BYD Company Ltd

Longgang, China

BYD Company Ltd

Longgang, China
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Patent
Byd Company Ltd | Date: 2012-02-01

A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, an energy limiting circuit, and an energy control unit for energy storage circuit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1, switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so that the energy can flow to and fro between the battery and the energy storage circuit when the switch unit (1) switches on; the energy limiting circuit is designed to limit the magnitude of current flowing from the energy storage circuit to the battery; the energy control unit for energy storage circuit is connected with the energy storage circuit, and is designed to control the energy conversion in the energy storage circuit to a preset value after the switching control module (100) controls the switch unit (1) to switch on and then switch off. Using the heating circuit provided in the present invention, safety problem caused by overcurrent in the heating loop can be avoided, and therefore the battery can be protected effectively.

Claims which contain your search:

1. A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, an energy limiting circuit, and an energy control unit for energy storage circuit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1, switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so that the energy can flow to and fro between the battery and the energy storage circuit when the switch unit (1) switches on; the energy limiting circuit is designed to limit the magnitude of current flowing from the energy storage circuit to the battery; the energy control unit for energy storage circuit is connected with the energy storage circuit, and is designed to control the energy conversion in the energy storage circuit to a preset value after the switching control module (100) controls the switch unit (1) to switch on and then switch off.

2. The heating circuit according to Claim 1, wherein, the damping element R1 is the parasitic resistance in the battery, and the current storage element L1 is the parasitic inductance in the battery.

3. The heating circuit according to Claim 1, wherein, the switch unit (1) comprises a first one-way branch designed to enable energy flow from the battery to the energy storage circuit and a second one-way branch designed to enable energy flow from the energy storage circuit to the battery; the switching control module (100) is connected to either or both of the first one-way branch and second one-way branch, and is designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the connected branches.

4. The heating circuit according to Claim 3, wherein, the energy limiting circuit comprises a current storage element L11 connected in series in the second one-way branch.

5. The heating circuit according to Claim 4, wherein, the switch unit (1) comprises a switch K6, a one-way semiconductor element D11, and a one-way semiconductor element D12, the switch K6 and the one-way semiconductor element D11 are connected with each other in series to constitute the first one-way branch; the one-way semiconductor element D12 constitutes the second one-way branch; the switching control module (100) is connected with the switch K6, and is designed to control ON/OFF of the first one-way branch by controlling ON/OFF of the switch K6, the current storage element L11 is connected in series with the one-way semiconductor element D12.

6. The heating circuit according to Claim 5, wherein, the switch unit (1) further comprises a switch K7, and the switch K7 is connected with the one-way semiconductor element D12 in series in the second one-way branch; the switching control module (100) is further connected with the switch K7, and is designed to control ON/OFF of the second one-way branch by controlling ON/OFF of the switch K7, the current storage element L11 is connected in series between the one-way semiconductor element D12 and the switch K7.

7. The heating circuit according to Claim 1, wherein, the energy control unit for energy storage circuit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is designed to invert the voltage polarity of the charge storage element C1 after the switch unit (1) switches on and then switches off.

8. The heating circuit according to Claim 7, wherein, the energy control unit for energy storage circuit further comprises a electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the battery after the switch unit (1) switches on and then switches off and before the polarity inversion unit (102) inverts the voltage polarity of the charge storage element C1.

9. The heating circuit according to any of claims 7 or 8, wherein, the polarity inversion unit (102) comprises a single pole double throw switch J1 and a single pole double throw switch J2 located on the two ends of the charge storage element C1 respectively; the input wires of the single pole double throw switch J1 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J1 is connected with the first pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch J1 is connected with the second pole plate of the charge storage element C1; the input wires of the single pole double throw switch J2 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J2 is connected with the second pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch J2 is connected with the first pole plate of the charge storage element C1; the switching control module (100) is also connected with the single pole double throw switch J1 and single pole double throw switch J2 respectively, and is designed to invert the voltage polarity of the charge storage element C1 by altering the connection relationships between the respective input wires and output wires of the single pole double throw switch J1 and the single pole double throw switch J2.

10. The heating circuit according to any of claims 7 or 8, wherein, the polarity inversion unit (102) comprises a one-way semiconductor element D3, a current storage element L2, and a switch K9; the charge storage element C1, current storage element L2, and switch K9 are connected sequentially in series to form a loop; the one-way semiconductor element D3 is connected in series between the charge storage element C1 and the current storage element L2 or between the current storage element L2 and the switch K9; the switching control module (100) is also connected with the switch K9, and is designed to invert the voltage polarity of the charge storage element C1 by controlling the switch K9 to switch on.

11. The heating circuit according to any of claims 7 or 8, wherein, the polarity inversion unit (102) comprises a first DC-DC module (2) and a charge storage element C2; the first DC-DC module (2) is connected with the charge storage element C1 and the charge storage element C2 respectively; the switching control module (100) is also connected with the first DC-DC module (2), and is designed to transfer the energy in the charge storage element C1 to the charge storage element C2 by controlling the operation of the first DC-DC module (2), and then transfer the energy in the charge storage element C2 back to the charge storage element C1, so as to invert the voltage polarity of the charge storage element C1.

12. The heating circuit according to Claim 1, wherein, the energy control unit for energy storage circuit further comprises an electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the battery after the switch unit (1) switches on and then switches off.

13. The heating circuit according to any of claims 8 or 12, wherein, the electricity recharge unit (103) comprises a second DC-DC module (3), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the second DC-DC module (3), and is designed to transfer the energy in the charge storage element C1 to the battery by controlling the operation of the second DC-DC module (3).

14. The heating circuit according to claim 1, wherein, the energy control unit for energy storage circuit further comprises a DC-DC module (4), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the DC-DC module (4), and is designed to control the operation of the DC-DC module (4) to transfer the energy in the charge storage element C1 to the energy storage element, and then superpose the remaining energy in the charge storage element C1 with the energy in the battery after the switch unit (1) switches on and then switches off.


Patent
BYD Company Ltd | Date: 2012-02-01

A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, and an energy transfer unit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L 1 and a charge storage element C 1; the damping element R1 and switch unit (1) are connected in series with the energy storage circuit; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so as to control the energy flowing between the battery and the energy storage circuit; the energy transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off. The heating circuit provided in the present invention can improve the charge/discharge performance of the battery, improve safety when the battery is heated, and also has an energy recycling function.

Claims which contain your search:

1. A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, and an energy transfer unit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1 and the switch unit (1) are connected in series with the energy storage circuit; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so as to control the energy flowing between the battery and the energy storage circuit; the energy transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off.

2. The heating circuit according to Claim 1, wherein, the damping element R1 is the parasitic resistance in the battery, and the current storage element L1 is the parasitic inductance in the battery.

3. The heating circuit according to claim 2, wherein, the energy storage element is the battery, the energy transfer unit comprises an electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the battery after the switch unit (1) switches on and then switches off; the electricity recharge unit (103) comprises a second DC-DC module (3), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the second DC-DC module (3), and is designed to transfer the energy in the charge storage element C1 to the battery by controlling the operation of the second DC-DC module (3).

4. The heating circuit according to Claim 2, wherein, the switching control module (100) is designed to control ON/OFF of the switch unit (1), so as to control energy flowing from the battery to the energy storage circuit only.

5. The heating circuit according to Claim 4, wherein, the switch unit (1) comprises a switch K1 and a one-way semiconductor element D1, the switch K1 and the one-way semiconductor element D1 are connected with each other in series, and then connected in the energy storage circuit in series; the switching control module (100) is connected with the switch K1, and designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the switch K1.

7. The heating circuit according to Claim 6, wherein, the switching control module (100) is designed to control the switch unit (1) to switch off before the current flow through the switch unit (1) reaches to zero after the switch unit (1) switches on; the switch unit (1) comprises a one-way semiconductor element D9, a one-way semiconductor element D 10, a switch K2, a resistor R4, and a charge storage element C3; the one-way semiconductor element D9 and the switch K2 are connected in series in the energy storage circuit, the resistor R4 and the charge storage element C3 are connected with each other in series and then connected across the switch K2 in parallel; the one-way semiconductor element D10 is connected in parallel across the damping element R4, and is designed to sustain the current flow through the current storage element L1 when the switch K2 switches off; the switching control module (100) is connected with the switch K2, and is designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the switch K2.

8. The heating circuit according to Claim 2, wherein, the switching control module (100) is designed to control ON/OFF of the switch unit (1), so that the energy flows to and fro between the battery and the energy storage circuit when the switch unit (1) switches on.

10. The heating circuit according to Claim 8, wherein, the switch unit (1) comprises a first one-way branch designed to enable energy flow from the battery to the energy storage circuit and a second one-way branch designed to enable energy flow from the energy storage circuit to the battery; the switching control module (100) is connected to either or both of the first one-way branch and second one-way branch, and is designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the connected branches.

15. The heating circuit according to any of claims 1-14, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C 1 after the switch unit (1) switches on and then switches off and before the energy transfer unit performs energy transfer, or to consume the energy in the charge storage element C 1 after the energy transfer unit performs energy transfer; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage value across the charge storage element C1 to a predetermined voltage value after the switch unit (1) switches on and then switches off and before the energy transfer unit performs energy transfer, or to consume the energy in the charge storage element C1 after the energy transfer unit performs energy transfer.

16. The heating circuit according to Claim 15, wherein, the voltage control unit (101) comprises a damping element R5 and a switch K8, the damping element R5 and the switch K8 are connected with each other in series, and then connected in parallel across the charge storage element C1; the switching control module (100) is further connected with the switch K8, and is designed to control the switch K8 to switch on after the control switch unit (1) switches on and then switches off.


Certain embodiments of the present invention provide a battery heating circuit, comprising a switch unit 1, a switching control module 100, a damping component R1, an energy storage circuit, and an energy superposition unit; the energy storage circuit is configured to connect with the battery to form a loop, and comprises a current storage component L1 and a charge storage component C1; the damping component R1, the switch unit 1, the current storage component L1, and the charge storage component C1 are connected in series; the switching control module 100 is connected with the switch unit 1, and is configured to control ON/OFF of the switch unit 1, so as to control the energy flowing between the battery and the energy storage circuit.

Claims which contain your search:

1. A circuit for heating a battery, the circuit comprising: the battery including a first damping component and a first current storage component, the first damping component and the first current storage component being parasitic to the battery, the battery including a first battery terminal and a second battery terminal; a switch unit; a switching control component coupled to the switch unit; a first charge storage component, the first charge storage component and the first current storage component being at least parts of an energy storage circuit; and an energy superposition unit coupled to the first charge storage component; wherein:the first damping component, the first current storage component, the switch unit, and the first charge storage component are connected in series;the switching control component is configured to turn on and off the switch unit so as to control a first current flowing between the battery and the first charge storage component, the switching control component being further configured to turn off the switch unit if a second current flowing from a positive voltage terminal of the battery to the first charge storage component reduces to zero in magnitude after the switch unit is turned on; andthe energy superposition unit is configured to, after the switch unit is turned on and then turned off, adjust a storage voltage associated with the first charge storage component so that a positive voltage terminal of the first charge storage component is coupled, directly or indirectly, to a negative voltage terminal of the battery; wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery.

3. The circuit of claim 1 wherein: the first damping component is a parasitic resistor of the battery; and the first current storage component is a parasitic inductor of the battery.

4. The circuit of claim 3 wherein the first charge storage component is a capacitor.

5. The circuit of claim 4 wherein the energy superposition unit includes a polarity inversion unit coupled to the first charge storage component and configured to, after the switch unit is turned on and then turned off, invert a voltage polarity associated with the first charge storage component.

6. The circuit of claim 5 wherein the polarity inversion unit includes: a first single-pole double-throw switch coupled to a first storage terminal of the first charge storage component; and a second single-pole double-throw switch coupled to a second storage terminal of the second charge storage component; wherein:the first single-pole double-throw switch includes a first input wire, a first output wire, and a second output wire;the first input wire is coupled, directly or indirectly, to the first battery terminal; andthe first output wire and the second output wire are coupled to the first storage terminal and the second storage terminal respectively; wherein:the second single-pole double-throw switch includes a second input wire, a third output wire, and a fourth output wire;the second input wire is coupled, directly or indirectly, to the second battery terminal; andthe third output wire and the fourth output wire are coupled to the second storage terminal and the first storage terminal respectively; wherein the switching control component is coupled to the first single-pole double-throw switch and the second single-pole double-throw switch, and is configured to invert the voltage polarity associated with the first charge storage component by altering connection relationships among the first input wire, the first output wire, the second output wire, the second input wire, the third output wire, and the fourth output wire.

7. The circuit of claim 5 wherein the polarity inversion unit includes: a second current storage component; a first switch; and a first one-way semiconductor component connected between the first charge storage component and the second current storage component or between the second current storage component and the first switch; wherein:the first charge storage component, the first one-way semiconductor component, the second current storage component, and the first switch are at least parts of a polarity inversion loop; andthe switching control component is coupled to the first switch and is configured to invert the voltage polarity associated with the first charge storage component by turning on the first switch.

8. The circuit of claim 5 wherein the polarity inversion unit includes: a second charge storage component; and a first DC-DC module coupled to the second charge storage component and the first charge storage component; wherein the switching control component is coupled to the first DC-DC module and configured to invert the voltage polarity associated with the first charge storage component by transferring energy from the first charge storage component to the second charge storage component and then transferring the energy from the second charge storage component back to the first charge storage component.

10. The circuit of claim 1 wherein the switch unit includes a first branch circuit for conduction in a first direction and a second branch circuit for conduction in a second direction, the first direction being from the positive voltage terminal of the battery to the first charge storage component, the second direction being from the battery to the first charge storage component.

15. The circuit of claim 1, and further comprising an energy consumption unit coupled to the first charge storage component and configured to consume energy stored in the first charge storage component after the switch unit is turned on and then turned off but before the storage voltage is adjusted by the energy superposition unit.

16. The circuit of claim 15 wherein the energy consumption unit includes a voltage control unit configured to regulate the storage voltage associated with the first charge storage component to a predetermined voltage after the switch unit is turned on and then turned off but before the storage voltage is adjusted by the energy superposition unit.

17. The circuit of claim 16 wherein the voltage control unit includes: a second damping component; and a first switch connected in series with the second damping component; wherein the first charge storage component is connected in parallel with a combination of the second damping component and the first switch.

19. The circuit of claim 1, and further comprising a freewheeling circuit connected between the first battery terminal and the second battery terminal and configured to allow a freewheeling current to flow to the battery after the switch unit is turned on and then turned off.

20. The circuit of claim 19 wherein: the freewheeling circuit includes a first switch and a first one-way semiconductor component connected in series with the first switch, the first switch being coupled to the switching control component; and the switching control component is configured to:turn on the first switch to allow the freewheeling current to flow to the battery after the switch unit is turned on and then turned off; andturn off the first switch if the freewheeling current flowing to the battery reaches a predetermined magnitude.

21. The circuit of claim 19 wherein: the freewheeling circuit includes a second charge storage component, a first one-way semiconductor component, and a second damping component in parallel with the first one-way semiconductor component, the second charge storage component is in series with a combination of the first one-way semiconductor component and the second damping component.

22. The circuit of claim 1 is further configured to: start heating the battery if at least one heating start condition is satisfied; and stop heating the battery if at least one heating stop condition is satisfied.

23. The circuit of claim 1 wherein the second battery terminal is the negative voltage terminal of the battery.

24. The circuit of claim 1 wherein the switching control component is further configured to turn off the switch unit if a third current flowing from the first charge storage component to the positive voltage terminal of the battery reduces to zero in magnitude after the switch unit is turned on.


Certain embodiments of the present invention provide a battery heating circuit, comprising a switch unit 1, a switching control module 100, a damping component R1, an energy storage circuit, a freewheeling circuit 20, and an energy superposition unit; the energy storage circuit is configured to connect with the battery to form a loop, and comprises a current storage component L1 and a charge storage component C1; the damping component R1, the switch unit 1, the current storage component L1, and the charge storage component C1 are connected in series; the switching control module 100 is connected with the switch unit 1, and is configured to control ON/OFF of the switch unit 1, so as to control the energy flowing between the battery and the energy storage circuit; the energy superposition unit is connected with the energy storage circuit.

Claims which contain your search:

1. A circuit for heating a battery, the circuit comprising: the battery including a first damping component and a first current storage component, the first damping component and the first current storage component being parasitic to the battery, the battery including a first battery terminal and a second battery terminal; a switch unit; a switching control component coupled to the switch unit; a first charge storage component, the first charge storage component and the first current storage component being at least parts of an energy storage circuit; and an energy superposition unit coupled to the first charge storage component; a freewheeling circuit connected between the first battery terminal and the second battery terminal; wherein:the first damping component, the first current storage component, the switch unit, and the first charge storage component are connected in series;the switching control component is configured to turn on and off the switch unit so as to control a first current flowing between the battery and the first charge storage component;the energy superposition unit is configured to, after the switch unit is turned on and then turned off, adjust a storage voltage associated with the first charge storage component so that a positive voltage terminal of the first charge storage component is coupled, directly or indirectly, to a negative voltage terminal of the battery; andthe freewheeling circuit configured to allow a freewheeling current to flow to the battery after the switch unit is turned on and then turned off; wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery.

2. The circuit of claim 1 wherein: the first damping component is a parasitic resistor of the battery; and the first current storage component is a parasitic inductor of the battery.

3. The circuit of claim 2 wherein the first charge storage component is a capacitor.

4. The circuit of claim 3 wherein the energy superposition unit includes a polarity inversion unit coupled to the first charge storage component and configured to, after the switch unit is turned on and then turned off, invert a voltage polarity associated with the first charge storage component.

5. The circuit of claim 4 wherein the polarity inversion unit includes: a first single-pole double-throw switch coupled to a first storage terminal of the first charge storage component; and a second single-pole double-throw switch coupled to a second storage terminal of the second charge storage component; wherein:the first single-pole double-throw switch includes a first input wire, a first output wire, and a second output wire;the first input wire is coupled, directly or indirectly, to the first battery terminal; andthe first output wire and the second output wire are coupled to the first storage terminal and the second storage terminal respectively; wherein:the second single-pole double-throw switch includes a second input wire, a third output wire, and a fourth output wire;the second input wire is coupled, directly or indirectly, to the second battery terminal; andthe third output wire and the fourth output wire are coupled to the second storage terminal and the first storage terminal respectively; wherein the switching control component is coupled to the first single-pole double-throw switch and the second single-pole double-throw switch, and is configured to invert the voltage polarity associated with the first charge storage component by altering connection relationships among the first input wire, the first output wire, the second output wire, the second input wire, the third output wire, and the fourth output wire.

6. The circuit of claim 4 wherein the polarity inversion unit includes: a second current storage component; a first switch; and a first one-way semiconductor component connected between the first charge storage component and the second current storage component or between the second current storage component and the first switch; wherein:the first charge storage component, the first one-way semiconductor component, the second current storage component, and the first switch are at least parts of a polarity inversion loop; andthe switching control component is coupled to the first switch and is configured to invert the voltage polarity associated with the first charge storage component by turning on the first switch.

7. The circuit of claim 4 wherein the polarity inversion unit includes: a second charge storage component; and a first DC-DC module coupled to the second charge storage component and the first charge storage component; wherein the switching control component is coupled to the first DC-DC module and configured to invert the voltage polarity associated with the first charge storage component by transferring energy from the first charge storage component to the second charge storage component and then transferring the energy from the second charge storage component back to the first charge storage component.

9. The circuit of claim 1 wherein the switch unit includes a first branch circuit for conduction in a first direction and a second branch circuit for conduction in a second direction, the first direction being from the positive voltage terminal of the battery to the first charge storage component, the second direction being from the battery to the first charge storage component.

14. The circuit of claim 1, and further comprising an energy consumption unit coupled to the first charge storage component and configured to consume energy stored in the first charge storage component after the switch unit is turned on and then turned off but before the storage voltage is adjusted by the energy superposition unit.

15. The circuit of claim 14 wherein the energy consumption unit includes a voltage control unit configured to regulate the storage voltage associated with the first charge storage component to a predetermined voltage after the switch unit is turned on and then turned off but before the storage voltage is adjusted by the energy superposition unit.

16. The circuit of claim 15 wherein the voltage control unit includes: a second damping component; and a first switch connected in series with the second damping component; wherein the first charge storage component is connected in parallel with a combination of the second damping component and the first switch.

18. The circuit of claim 1 wherein: the freewheeling circuit includes a first switch and a first one-way semiconductor component connected in series with the first switch, the first switch being coupled to the switching control component; and the switching control component is configured to:turn on the first switch to allow the freewheeling current to flow to the battery after the switch unit is turned on and then turned off; andturn off the first switch if the freewheeling current flowing to the battery reaches a predetermined magnitude.

19. The circuit of claim 1 wherein: the freewheeling circuit includes a second charge storage component, a first one-way semiconductor component, and a second damping component in parallel with the first one-way semiconductor component, the second charge storage component is in series with a combination of the first one-way semiconductor component and the second damping component.

20. The circuit of claim 1 is further configured to: start heating the battery if at least one heating start condition is satisfied; and stop heating the battery if at least one heating stop condition is satisfied.

21. The circuit of claim 1 wherein the second battery terminal is the negative voltage terminal of the battery.


Certain embodiments of the present invention provide a battery heating circuit, wherein: the battery comprises a first battery and a second battery; the heating circuit comprises a first switch unit, a second switch unit, a damping component R1, a damping component R2, a current storage component L3, a current storage component L4, a switching control module and an energy storage component V1; the first battery, the damping component R1, the current storage component L3, the energy storage component V1 and the first switch unit are connected in series to constitute a first charging/discharging circuit; the second battery, the damping component R2, the current storage component L4, the energy storage component V1 and the second switch unit are connected in series to constitute a second charging/discharging circuit.

Claims which contain your search:

1. A circuit for heating a first battery and a second battery, the circuit comprising: the first battery including a first damping component and a first current storage component, the first damping component and the first current storage component being parasitic to the first battery; the second battery including a second damping component and a second current storage component, the second damping component and the second current storage component being parasitic to the second battery; a first switch unit; a second switch unit; a switching control component coupled to the first switch unit and the second switch unit; and a first energy storage component including a first storage terminal and a second storage terminal, the first storage terminal being coupled to a first negative terminal of the first battery through the first switch unit, the second storage terminal being coupled to a second negative terminal of the second battery through the second switch unit; wherein:the first battery, the first switch unit, and the first energy storage component are connected to form a first charging and discharging circuit; andthe second battery, the second switch unit, and the first energy storage component are connected to form a second charging and discharging circuit; wherein:the switching control component is configured to turn on the first switch unit and the second switch unit alternately so as to control a first current flowing between the first battery and the first energy storage component and a second current flowing between the second battery and the first energy storage component; andthe circuit for heating the first battery and the second battery is configured to heat the first battery and the second battery by at least discharging the first battery and discharging the second battery.

2. The circuit of claim 1 wherein the circuit for heating the first battery and the second battery is further configured to charge the first energy storage component with the first current flowing in a first direction and with the second current flowing in a second direction, the first direction and the second direction being opposite to each other.

3. The circuit of claim 1 wherein: the first damping component is a first parasitic resistor of the first battery; the first current storage component is a first parasitic inductor of the battery; the second damping component is a second parasitic resistor of the second battery; and the second current storage component is a second parasitic inductor of the battery.

4. The circuit of claim 1 wherein the first energy storage component includes an inductor.

7. The circuit of claim 1 wherein the first energy storage component includes a capacitor.

10. The circuit of claim 1, and further comprising: a second energy storage component; wherein:the first battery, the second switch unit, and the second energy storage component are connected to form a third charging and discharging circuit; andthe second battery, the first switch unit, and the second energy storage component are connected to form a fourth charging and discharging circuit; wherein the switching control component is configured to turn on the first switch unit and the second switch unit alternately so as to control a third current flowing between the first battery and the second energy storage component and a fourth current flowing between the second battery and the second energy storage component.

11. The circuit of claim 10 wherein the circuit for heating the first battery and the second battery is further configured to charge the second energy storage component with the third current flowing in a third direction and with the fourth current flowing in a fourth direction, the third direction and the fourth direction being opposite to each other.

12. The circuit of claim 10 wherein: the first energy storage component includes a first inductor; and the second energy storage component includes a second inductor.

15. The circuit of claim 10 wherein: the first energy storage component includes a first capacitor; and the second energy storage component includes a second capacitor.

20. The circuit of claim 1 is further configured to: start heating the first battery and the second battery if at least one heating start condition is satisfied; and stop heating the first battery and the second battery if at least one heating stop condition is satisfied.


Patent
Byd Company Ltd | Date: 2012-02-01

A battery heating circuit is provided, comprising a switch unit (1), a switching control module (100), a damping element RI, and an energy storage circuit, the energy storage circuit is designed to connected with the battery and comprises a current storage element L and a charge storage element C 1; the damping element R1, switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1) and is designed to control ON/OFF of the switch unit (1), so as to control energy flowing from the battery to the energy storage circuit only. The heating circuit provided in the present invention can improve the charge/discharge performance of the battery, improve safety when the battery is heated.

Claims which contain your search:

1. A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element RI, and an energy storage circuit, the energy storage circuit is designed to connected with the battery and comprises a current storage element L1 and a charge storage element C1; the damping element R1, switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1) and is designed to control ON/OFF of the switch unit (1), so as to control energy flowing from the battery to the energy storage circuit only.

2. The heating circuit according to Claim 1, wherein, the damping element RI is the parasitic resistance in the battery, and the current storage element LI is the parasitic inductance in the battery.

3. The heating circuit according to claim 2, wherein, the heating circuit further comprises an energy superposition unit, which is connected with the energy storage circuit, and is designed to superpose the energy in the energy storage circuit with the energy in the battery after the switching control module (100) controlling the switch unit (1) to switch on and then to switch off; the energy superposition unit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is designed to invert the voltage polarity of the charge storage element C1 after the switch unit (1) switches on and then switches off.

4. The heating circuit according to claim 2, wherein, the heating circuit further comprises an energy transfer unit, which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off; the energy transfer unit comprises an electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off.

5. The heating circuit according to claim 2, wherein, the heating circuit further comprises an energy superposition and transfer unit connected with the energy storage circuit; the energy superposition and transfer unit is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off, and then superpose the remaining energy in the energy storage circuit with the energy in the battery.

6. The heating circuit according to claim 5, wherein, the energy superposition and transfer unit comprises a DC-DC module (4), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the DC-DC module (4), and is designed to control the operation of the DC-DC module (4) to transfer the energy in the charge storage element C1 to the energy storage element, and then superpose the remaining energy in the charge storage element C1 with the energy in the battery.

7. The heating circuit according to claim 5, wherein, the energy superposition and transfer unit comprises an energy superposition unit and an energy transfer unit; the energy transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off; the energy superposition unit is connected with the energy storage circuit, and is designed to superpose the remaining energy in the energy storage circuit with the energy in the battery after the energy transfer unit performs energy transfer; the energy transfer unit comprises a electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off; the energy superposition unit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is designed to invert the voltage polarity of the charge storage element C1 after the electricity recharge unit (103) performs energy transfer.

8. The heating circuit according to any of claims 3 or 7, wherein, the polarity inversion unit (102) comprises a single pole double throw switch J1 and a single pole double throw switch J2 located on the two ends of the charge storage element C1 respectively; the input wires of the single pole double throw switch 11 are connected in the energy storage circuit, the first output wire of the single pole double throw switch 11 is connected with the first pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch 11 is connected with the second pole plate of the charge storage element C1; the input wires of the single pole double throw switch J2 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J2 is connected with the second pole plate of the charge storage element C 1, and the second output wire of the single pole double throw switch J2 is connected with the first pole plate of the charge storage element C1; the switching control module (100) is also connected with the single pole double throw switch 11 and single pole double throw switch J2 respectively, and is designed to invert the voltage polarity of the charge storage element C1 by altering the connection relationships between the respective input wires and output wires of the single pole double throw switch J1 and the single pole double throw switch J2.

9. The heating circuit according to any of claims 3 or 7, wherein, the polarity inversion unit (102) comprises a one-way semiconductor element D3, a current storage element L2, and a switch K9; the charge storage element C1, current storage element L2, and switch K9 are connected sequentially in series to form a loop; the one-way semiconductor element D3 is connected in series between the charge storage element C 1 and the current storage element L2 or between the current storage element L2 and the switch K9; the switching control module (100) is also connected with the switch K9, and is designed to invert the voltage polarity of the charge storage element C 1 by controlling the switch K9 to switch on.

10. The heating circuit according to any of claims 3 or 7, wherein, the polarity inversion unit (102) comprises a first DC-DC module (2) and a charge storage element C2; the first DC-DC module (2) is connected with the charge storage element C1 and the charge storage element C2 respectively; the switching control module (100) is also connected with the first DC-DC module (2), and is designed to transfer the energy in the charge storage element C1 to the charge storage element C2 by controlling the operation of the first DC-DC module (2), and then transfer the energy in the charge storage element C2 back to the charge storage element Cl, so as to invert the voltage polarity of the charge storage element C 1.

11. The heating circuit according to any of claims 4 or 7, wherein, the electricity recharge unit (103) comprises a second DC-DC module (3), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the second DC-DC module (3), and is designed to transfer the energy in the charge storage element C1 to the battery by controlling the operation of the second DC-DC module (3).

12. The heating circuit according to claim 2, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 l after the switch unit (1) switches on and then switches off; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage value across the charge storage element C1 to a predetermined voltage value after the switch unit (1) switches on and then switches off.

13. The heating circuit according to claim 3, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy superposition unit performs energy superposition; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element C1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy superposition unit performs energy superposition.

14. The heating circuit according to claim 4, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 l after the switch unit (1) switches on and then switches off and before the energy transfer unit performs energy transfer, or consume the energy in the charge storage element C1 after the energy transfer unit performs energy transfer; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element Cl to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy transfer unit performs energy transfer, or convert the voltage across the charge storage element C 1 to a predetermined value of voltage after the energy transfer unit performs energy transfer.

15. The heating circuit according to claim 5, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy superposition and transfer unit performs energy transfer, or consume the energy in the charge storage element after the energy superposition and transfer unit performs energy transfer and before the energy superposition and transfer unit performs energy superposition; the energy consumption unit comprises a voltage control unit C 101 ) , which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element C1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy superposition and transfer unit performs energy transfer, or convert the voltage across the charge storage element C 1 to a predetermined value of voltage after the energy superposition and transfer unit performs energy transfer and before the energy superposition and transfer unit performs energy superposition.

16. The heating circuit according to any of Claims 12-15, wherein, the voltage control unit (101) comprises a damping element R5 and a switch K8, the damping element R5 and the switch K8 are connected with each other in series, and then connected in parallel across the charge storage element C1; the switching control module (100) is further connected with the switch K8, and is designed to control the switch K8 to switch on after the control switch unit (1) switches on and then switches off.

17. The heating circuit according to Claim 2, wherein, the switch unit (1) comprises a switch K1 and a one-way semiconductor element D1, the switch K1 and the one-way semiconductor element D1 are connected with each other in series, and then connected in the energy storage circuit in series; the switching control module (100) is connected with the switch K1, and designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the switch K1.

19. The heating circuit according to Claim 18, wherein, the switching control module (100) is designed to control the switch unit (1) to switch off before the current flow through the switch unit (1) reaches to zero after the switch unit (1) switches on;the switch unit (1) comprises a one-way semiconductor element D9, a one-way semiconductor element DIG, a switch K2, a resistor R4, and a charge storage element C3; the one-way semiconductor element D9 and the switch K2 are connected in series in the energy storage circuit, the resistor R4 and the charge storage element C3 are connected with each other in series and then connected across the switch K2 in parallel; the one-way semiconductor element D10 is connected in parallel across the damping element R4, and is designed to sustain the current flow through the current storage element L1 when the switch K2 switches off; the switching control module (100) is connected with the switch K2, and is designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the switch K2.


Patent
Byd Company Ltd | Date: 2012-02-01

A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, and an energy superposition and transfer unit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C 1; the damping element R1 , switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so as to control the energy flowing between the battery and the energy storage circuit; the energy superposition and transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off, and then superpose the remaining energy in the energy storage circuit with the energy in the battery. The heating circuit provided in the present invention can improve the charge/discharge performance of a battery, enhance the safety of battery heating, and improve the working efficiency of the heating circuit, and energy recycling can be achieved.

Claims which contain your search:

1. A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, and an energy superposition and transfer unit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1 , switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so as to control the energy flowing between the battery and the energy storage circuit; the energy superposition and transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off, and then superpose the remaining energy in the energy storage circuit with the energy in the battery.

2. The heating circuit according to Claim l, wherein, the damping element R1 is the parasitic resistance in the battery, and the current storage element L1 is the parasitic inductance in the battery.

3. The heating circuit according to claim 2, wherein, the energy superposition and transfer unit comprises a DC-DC module (4), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the DC-DC module (4), and is designed to control the operation of the DC-DC module (4) to transfer the energy in the charge storage element C1 to the energy storage element, and then superpose the remaining energy in the charge storage element C1 with the energy in the battery.

4. The heating circuit according to claim 2, wherein, the energy superposition and transfer unit comprises an energy superposition unit and an energy transfer unit; the energy transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off; the energy superposition unit is connected with the energy storage circuit, and is designed to superpose the remaining energy in the energy storage circuit with the energy in the battery after the energy transfer unit performs energy transfer.

5. The heating circuit according to claim 4, wherein, the energy storage element is the battery, the energy transfer unit comprises an electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the battery after the switch unit (1) switches on and then switches off; the electricity recharge unit (103) comprises a second DC-DC module (3), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the second DC-DC module (3), and is designed to transfer the energy in the charge storage element C1 to the battery by controlling the operation of the second DC-DC module (3).

6. The heating circuit according to claim 4, wherein, the energy superposition unit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is designed to invert the voltage polarity of the charge storage element C1 after the energy transfer unit performs energy transfer.

7. The heating circuit according to claim 6, wherein, the polarity inversion unit (102) comprises a single pole double throw switch J1 and a single pole double throw switch J2 located on the two ends of the charge storage element C1 respectively; the input wires of the single pole double throw switch J1 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J1 is connected with the first pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch J1 is connected with the second pole plate of the charge storage element C1; the input wires of the single pole double throw switch J2 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J2 is connected with the second pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch J2 is connected with the first pole plate of the charge storage element C1; the switching control module (100) is also connected with the single pole double throw switch J1 and single pole double throw switch J2 respectively, and is designed to invert the voltage polarity of the charge storage element C by altering the connection relationships between the respective input wires and output wires of the single pole double throw switch J1\ and the single pole double throw switch J2.

8. The heating circuit according to claim 6, wherein, the polarity inversion unit (102) comprises a one-way semiconductor element D3, a current storage element L2, and a switch K9; the charge storage element Cl, current storage element L2, and switch K9 are connected sequentially in series to form a loop; the one-way semiconductor element D3 is connected in series between the charge storage element C1 and the current storage element L2 or between the current storage element L2 and the switch K9; the switching control module (100) is also connected with the switch K9, and is designed to invert the voltage polarity of the charge storage element C 1 by controlling the switch K9 to switch on.

9. The heating circuit according to claim 6, wherein, the polarity inversion unit (102) comprises a first DC-DC module (2) and a charge storage element C2; the first DC-DC module (2) is connected with the charge storage element C1 and the charge storage element C2 respectively; the switching control module (100) is also connected with the first DC-DC module (2), and is designed to transfer the energy in the charge storage element C1 to the charge storage element C2 by controlling the operation of the first DC-DC module (2), and then transfer the energy in the charge storage element C2 back to the charge storage element C1, so as to invert the voltage polarity of the charge storage element C 1.

10. The heating circuit according to claim 2, wherein, the switching control module (100) is designed to control ON/OFF of the switch unit (1), so as to control the energy to flow from the battery to the energy storage circuit only.

11. The heating circuit according to Claim 10, wherein, the switch unit (1) comprises a switch K1 and a one-way semiconductor element D1, the switch K1 and the one-way semiconductor element D1 are connected with each other in series, and then connected in the energy storage circuit in series; the switching control module (100) is connected with the switch K1, and designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the switch K1 .

13. The heating circuit according to Claim 12, wherein, the switching control module (100) is designed to control the switch unit (1) to switch off before the current flow through the switch unit (1) reaches to zero after the switch unit (1) switches on; the switch unit (1) comprises a one-way semiconductor element D9, a one-way semiconductor element D 10, a switch K2, a resistor R4, and a charge storage element C3; the one-way semiconductor element D9 and the switch K2 are connected in series in the energy storage circuit, the resistor R4 and the charge storage element C3 are connected with each other in series and then connected across the switch K2 in parallel; the one-way semiconductor element D10 is connected in parallel across the damping element R4, and is designed to sustain the current flow through the current storage element L1 when the switch K2 switches off; the switching control module (100) is connected with the switch K2, and is designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the switch K2.

14. The heating circuit according to Claim 2, wherein, the switching control module (100) is designed to control ON/OFF of the switch unit (1), so that the energy flows to and fro between the battery and the energy storage circuit when the switch unit (1) switches on.

16. The heating circuit according to Claim 14, wherein, the switch unit (1) comprises a first one-way branch designed to enable energy flow from the battery to the energy storage circuit and a second one-way branch designed to enable energy flow from the energy storage circuit to the battery; the switching control module (100) is connected to either or both of the first one-way branch and second one-way branch, and is designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the connected branches.

21. The heating circuit according to any of claims 1-20, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element Cl, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy superposition and transfer unit performs energy transfer, or to consume the energy in the charge storage element C1 after the energy superposition and transfer unit performs energy transfer and before the energy superposition and transfer unit performs energy superposition; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element Cl, and is designed to convert the voltage value across the charge storage element C1 to the predetermined voltage value after the switch unit (1) switches on and then switches off and before the energy superposition and transfer unit performs energy transfer, or to convert the voltage value across the charge storage element C1 to the predetermined voltage value after the energy superposition and transfer unit performs energy transfer and before the energy superposition and transfer unit performs energy superposition; the voltage control unit (101) comprises a damping element R5 and a switch K8; the damping element R5 and the switch K8 are connected in series with each other, and then connected in parallel between the two ends of the charge storage element C1; the switching control module (100) is also connected with the switch K8, and is also designed to control the switch K8 to switch on after controlling the switch unit (1) to switch on and then to switch off.


Patent
Byd Company Ltd | Date: 2012-02-01

The present invention provides a battery heating circuit, wherein, the battery comprises a first battery and a second battery; the heating circuit comprises a first switch unit, a second switch unit, a damping element R1, a damping element R2, a current storage element L3, a current storage element L4, a switching control module and an energy storage element V1; the first battery, damping element R1, current storage element L3, energy storage element V1 and first switch unit are connected in series to constitute a first charging/discharging circuit; the second battery, damping element R2, current storage element L4, energy storage element V1 and second switch unit are connected in series to constitute a second charging/discharging circuit; when the energy storage element V1 is charged or discharges, the direction of charging/discharging current in the second charging/discharging circuit is reverse to the direction of charging/discharging current in the first charging/discharging circuit; the switching control module is electrically connected with the first switch unit and second switch unit, and is configured to control the first switch unit and second switch unit to switch on in alternate, so as to control the electric energy to flow among the first battery, energy storage element V1 and second battery. The battery heating circuit of the present invention can achieve high heating efficiency.

Claims which contain your search:

1. A battery heating circuit, the battery comprises a first battery (E1) and a second battery (E2); the heating circuit comprises a first switch unit (10), a second switch unit (20), a damping element R1, a damping element R2, a current storage element L3, a current storage element L4, a switching control module (100) and an energy storage element V1,the first battery (E1), the damping element R1, the current storage element L3, the energy storage element V1 and the first switch unit (10) are connected in series to constitute a first charging/discharging circuit;the second battery (E2), the damping element R2, the current storage element L4, the energy storage element V1 and the second switch unit (20) are connected in series to constitute a second charging/discharging circuit; when the energy storage element V1 is charged or discharges, the direction of charging/discharging current in the second charging/discharging circuit is reverse to the direction of charging/discharging current in the first charging/discharging circuit;the switching control module (100) is electrically connected with the first switch unit (10) and second switch unit (20), and the switching control module (100) is configured to control the first switch unit (10) and the second switch unit (20) to switch on in alternate, so as to control the electric energy to flow among the first battery (E1), the energy storage element V1 and the second battery (E2).

2. The battery heating circuit according to claim 1, wherein the damping element R1 and the damping element R2 are the parasitic resistances in the first battery (E1) and the second battery (E2) respectively, and the current storage element L3 and the current storage element L4 are the parasitic inductances in the first battery (E1) and the second battery (E2) respectively.

3. The battery heating circuit according to claim 1, wherein the energy storage element V1 is an inductor L1.

4. The battery heating circuit according to claim 3, wherein the switching control module (100) is configured to control the first switch unit (10) and the second switch unit (20) to switch their ON/OFF states when the current in the inductor L1 reaches to a preset value.

5. The battery heating circuit according to claim 1, wherein the energy storage element V1 is a capacitor C1.

6. The battery heating circuit according to claims 5, wherein the switching control module (100) is configured to control the first switch unit (10) and second switch unit (20) to switch their ON/OFF states when the current in the capacitor C1 reaches to zero after each pair of continuous positive and negative half cycles or each pair of continuous negative and positive half cycles.

7. The battery heating circuit according to claim 1, wherein the heating circuit further comprises an energy storage element V2,the first battery (E1), the damping element R1, the current storage element L3, the energy storage element V2 and the second switch unit (20) are connected in series to form a third charging/discharging circuit;the second battery (E2), the damping element R2, the current storage element L4, the energy storage element V2 and the first switch unit (10) are connected in series to form a fourth charging/discharging circuit; when the energy storage element V2 is charged or discharges, the direction of charging/discharging current in the third charging/discharging circuit is reverse to the direction of charging/discharging current in the fourth charging/discharging circuit;the switching control module (100) is configured to control the electric energy to flow among the first battery (E1), the energy storage element V1, the energy storage element V2 and the second battery (E2) by controlling the first switch unit (10) and the second switch unit (20) to switch on in alternate.

8. The battery heating circuit according to claim 7, wherein the energy storage element V1 is an inductor L1, the energy storage element V2 is an inductor L2

9. The battery heating circuit according to claim 8, wherein the switching control module (100) is configured to control the first switch unit (10) and the second switch unit (20) to switch their ON/OFF states when the current in the inductor L1 or the inductor L2 reaches to a preset value.

10. The battery heating circuit according to claim 7, wherein the energy storage element V1 is a capacitor C1, the energy storage element V2 is a capacitor C2.

11. The battery heating circuit according to claim 10, wherein the switching control module (100) is configured to control the first switch unit (10) and the second switch unit (20) to switch their ON/OFF states when the current in the capacitor C1 or capacitor C2 reaches to zero after each pair of continuous positive and negative half cycles or each pair of continuous negative and positive half cycles.

12. The battery heating circuit according to any one of claims 1 to 11, wherein the first switch unit (10) and/or the second switch unit (20) comprises a switch K11 and a one-way semiconductor element D11 connected in parallel with the switch K11 in reverse direction , and the switching control module (100) is electrically connected with the switch K11, and the switching control module (100) is configured to control ON/OFF of the forward direction branches of the first switch unit (10) and/or the second switch unit (20) by controlling ON/OFF of the switch K11.


Patent
Byd Company Ltd | Date: 2012-02-01

A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, and an energy storage circuit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1, switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so that the energy can flow to and fro between the battery and the energy storage circuit when the switch unit (1) switches on. The heating circuit provided in the present invention can improve the charge/discharge performance of a battery, enhance the safety of battery heating, and improve the working efficiency of the heating circuit.

Claims which contain your search:

1. A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, and an energy storage circuit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1, switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so that the energy can flow to and fro between the battery and the energy storage circuit when the switch unit (1) switches on.

2. The heating circuit according to Claim 1, wherein, the damping element R1 is the parasitic resistance in the battery, and the current storage element L1 is the parasitic inductance in the battery.

4. The heating circuit according to one of the Claims 1 to 3, wherein, the switch unit (1) comprises a first one-way branch designed to enable energy flow from the battery to the energy storage circuit and a second one-way branch designed to enable energy flow from the energy storage circuit to the battery; the switching control module (100) is connected to either or both of the first one-way branch and second one-way branch, and is designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the connected branches.

9. The heating circuit according to one of the claims 1 to 8, wherein, the heating circuit further comprises an energy superposition unit, which is connected with the energy storage circuit, and is designed to superpose the energy in the energy storage circuit with the energy in the battery after the switching control module (100) controlling the switch unit (1) to switch on and then to switch off; the energy superposition unit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is designed to invert the voltage polarity of the charge storage element C1 after the switch unit (1) switches on and then switches off.

10. The heating circuit according to one of the claims 1 to 9, wherein, the heating circuit further comprises an energy transfer unit, which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off; the energy transfer unit comprises an electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off.

11. The heating circuit according to one of the claims 1 to 10, wherein, the heating circuit further comprises an energy superposition and transfer unit connected with the energy storage circuit; the energy superposition and transfer unit is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off, and then superpose the remaining energy in the energy storage circuit with the energy in the battery.

12. The heating circuit according to claim 11, wherein, the energy superposition and transfer unit comprises an energy superposition unit and an energy transfer unit; the energy transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off; the energy superposition unit is connected with the energy storage circuit, and is designed to superpose the remaining energy in the energy storage circuit with the energy in the battery after the energy transfer unit performs energy transfer; the energy transfer unit comprises a electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off; the energy superposition unit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is designed to invert the voltage polarity of the charge storage element C1 after the electricity recharge unit (103) performs energy transfer.

13. The heating circuit according to claim 11 or 12, wherein, the energy superposition and transfer unit comprises a DC-DC module (4), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the DC-DC module (4), and is designed to control the operation of the DC-DC module (4) to transfer the energy in the charge storage element C1 to the energy storage element, and then superpose the remaining energy in the charge storage element C 1 with the energy in the battery.

14. The heating circuit according to any of claims 9 to 13, wherein, the polarity inversion unit (102) comprises a single pole double throw switch J1 and a single pole double throw switch J2 located on the two ends of the charge storage element C1 respectively; the input wires of the single pole double throw switch J1 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J1 is connected with the first pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch J1 is connected with the second pole plate of the charge storage element C1; the input wires of the single pole double throw switch J2 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J2 is connected with the second pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch J2 is connected with the first pole plate of the charge storage element C1; the switching control module (100) is also connected with the single pole double throw switch J1 and single pole double throw switch J2 respectively, and is designed to invert the voltage polarity of the charge storage element C 1 by altering the connection relationships between the respective input wires and output wires of the single pole double throw switch J1 and the single pole double throw switch J2.

15. The heating circuit according to any of claims 9 to 14, wherein, the polarity inversion unit (102) comprises a one-way semiconductor element D3, a current storage element L2, and a switch K9; the charge storage element C1, current storage element L2, and switch K9 are connected sequentially in series to form a loop; the one-way semiconductor element D3 is connected in series between the charge storage element C1 and the current storage element L2 or between the current storage element L2 and the switch K9; the switching control module (100) is also connected with the switch K9, and is designed to invert the voltage polarity of the charge storage element C1 by controlling the switch K9 to switch on.

16. The heating circuit according to any of claims 9 to 15, wherein, the polarity inversion unit (102) comprises a first DC-DC module (2) and a charge storage element C2; the first DC-DC module (2) is connected with the charge storage element C1 and the charge storage element C2 respectively; the switching control module (100) is also connected with the first DC-DC module (2), and is designed to transfer the energy in the charge storage element C 1 to the charge storage element C2 by controlling the operation of the first DC-DC module (2), and then transfer the energy in the charge storage element C2 back to the charge storage element C1, so as to invert the voltage polarity of the charge storage element C1.

17. The heating circuit according to any of claims 10 to 16, wherein, the electricity recharge unit (103) comprises a second DC-DC module (3), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the second DC-DC module (3), and is designed to transfer the energy in the charge storage element C1 to the battery by controlling the operation of the second DC-DC module (3).

18. The heating circuit according to one of the claims 1 to 17, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C 1, and is designed to convert the voltage value across the charge storage element C1 to a predetermined voltage value after the switch unit (1) switches on and then switches off.

19. The heating circuit according to one of the claims 9 to 18, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy superposition unit performs energy superposition; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element C 1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy superposition unit performs energy superposition.

20. The heating circuit according to one of the claims 10 to 19, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy transfer unit performs energy transfer, or consume the energy in the charge storage element C 1 after the energy transfer unit performs energy transfer; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element C1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy transfer unit performs energy transfer, or convert the voltage across the charge storage element C1 to a predetermined value of voltage after the energy transfer unit performs energy transfer.

21. The heating circuit according to one of the claims 11 to 21, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy superposition and transfer unit performs energy transfer, or consume the energy in the charge storage element after the energy superposition and transfer unit performs energy transfer and before the energy superposition and transfer unit performs energy superposition; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element C 1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy superposition and transfer unit performs energy transfer, or convert the voltage across the charge storage element C 1 to a predetermined value of voltage after the energy superposition and transfer unit performs energy transfer and before the energy superposition and transfer unit performs energy superposition.

22. The heating circuit according to any of Claims 18-21, wherein, the voltage control unit (101) comprises a damping element R5 and a switch K8, the damping element R5 and the switch K8 are connected with each other in series, and then connected in parallel across the charge storage element C1; the switching control module (100) is further connected with the switch K8, and is designed to control the switch K8 to switch on after the control switch unit (1) switches on and then switches off.

24. The heating circuit according to any of the preceding claims, wherein, the heating circuit comprises a plurality of charge storage elements C1 and switch units (1), which are connected in series in one-to-one correspondence to form a plurality of branches; the branches are connected in parallel with each other and then connected in series with the current storage element L1 and damping element R1.

25. The heating circuit according to claim 24, wherein, the switching control module (100) controls a plurality of switch units (1), so that the energy flows from the battery to the respective energy storage circuits at the same time and flows from the energy storage circuits to the battery in sequence.


Patent
Byd Company Ltd | Date: 2012-02-22

The present invention provides a battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, and an energy limiting circuit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1, the switch unit (1), the current storage element L1, and the charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is configured to control ON/OFF of the switch unit (1), so that the energy can flow to and fro between the battery and the energy storage circuit when the switch unit (1) switches on; the energy limiting circuit is configured to limit the magnitude of current flowing from the energy storage circuit to the battery. The battery heating circuit provided in the present invention can avoid the safety problem caused by overcurrent in the heating circuit, so as to protect the battery efficiently.

Claims which contain your search:

1. A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, and an energy limiting circuit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1, the switch unit (1), the current storage element L1, and the charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is configured to control ON/OFF of the switch unit (1), so that the energy can flow to and fro between the battery and the energy storage circuit when the switch unit (1) switches on; the energy limiting circuit is configured to limit the magnitude of current flowing from the energy storage circuit to the battery.

2. The heating circuit according to Claim 1, wherein, the switch unit (1) comprises a first one-way branch designed to enable energy flow from the battery to the energy storage circuit and a second one-way branch designed to enable energy flow from the energy storage circuit to the battery; the switching control module (100) is connected to either or both of the first one-way branch and second one-way branch, and is designed to control ON/OFF of the switch unit (1) by controlling ON/OFF of the connected branches.

3. The heating circuit according to claim 2, wherein, the energy limiting circuit comprises a current storage element L11, which is connected in series in the second one-way branch.

6. The heating circuit according to claim 5, wherein, the heating circuit further comprises an one-way semiconductor element D15, an one-way semiconductor element D16, a switch K10, and a switch K11; the negative electrode of the one-way semiconductor element D16 is connected between the switch K7 and the charge storage element L11, the positive electrode of the one-way semiconductor element D16 is connected to one end of the switch K11, and the other end of the switch K11 is connected to the negative electrode of the battery; the positive electrode of the one-way semiconductor element D15 is connected between the one-way semiconductor element D12 and the charge storage element L11, the negative electrode of the one-way semiconductor element D15 is connected to one end of the switch K10, and the other end of the switch K10 is connected to the negative electrode of the battery; the switching control module (100) is also connected with the switch K10 and the switch K11 respectively, to control ON/OFF of the switch K10 and the switch K11.

7. The heating circuit according to claim 6, wherein, the switching control module (100) is configured to:control the switch K6 and the switch K7 to switch on, so that the energy can flow from the battery to the charge storage element C1 and flow from the charge storage element C1 back to the battery;control the switch K7 to switch off and control the switch K11 to switch on when the voltage across the charge storage element C1 reaches to a first preset value which is higher than the voltage of the battery;control the switch K11 to switch off when the current flowing through the current storage element L11 is zero, and control the switch K7 and switch K10 to switch on, so as to invert the voltage polarity of the charge storage element C1.

8. The heating circuit according to claim 6 or 7, wherein, the switching control module (100) is configured to:control the switch K6 and switch K7 to switch on, so that the energy can flow from the battery to the charge storage element C1 and flows from the charge storage element C1 back to the battery;control the switch K7 to switch off and control the switch K11 to switch on when the voltage across the charge storage element C1 reaches to a second preset value which is lower than or equal to the voltage of the battery;control the switch K11 to switch off and control the switch K7 and the switch K10 to switch on when the current flowing through the current storage element L11 reaches to a second set value of current;control the switch K10 to switch off when the current flowing through the current storage element L1 reaches to a first set value of current, so that the energy in the current storage element L11 flows to the battery;control the switch K7 and switch K10 to switch on when the current flowing through the current storage element L11 is zero, so as to invert the voltage polarity of the charge storage element C1.

9. The heating circuit according to one of the preceding claims, wherein, the heating circuit further comprises an energy superposition unit, which is connected with the energy storage circuit, and is designed to superpose the energy in the energy storage circuit with the energy in the battery after the switching control module (100) controlling the switch unit (1) to switch on and then to switch off; the energy superposition unit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is designed to invert the voltage polarity of the charge storage element C1 after the switch unit (1) switches on and then switches off.

10. The heating circuit according to one of the preceding claims, wherein, the heating circuit further comprises an energy transfer unit, which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off; the energy transfer unit comprises an electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off.

11. The heating circuit according to one of the preceding claims, wherein, the heating circuit further comprises an energy superposition and transfer unit connected with the energy storage circuit; the energy superposition and transfer unit is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off, and then superpose the remaining energy in the energy storage circuit with the energy in the battery.

12. The heating circuit according to claim 11, wherein, the energy superposition and transfer unit comprises an energy superposition unit and an energy transfer unit; the energy transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to an energy storage element after the switch unit (1) switches on and then switches off; the energy superposition unit is connected with the energy storage circuit, and is designed to superpose the remaining energy in the energy storage circuit with the energy in the battery after the energy transfer unit performs energy transfer; the energy transfer unit comprises an electricity recharge unit (103), which is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off; the energy superposition unit comprises a polarity inversion unit (102), which is connected with the energy storage circuit, and is designed to invert the voltage polarity of the charge storage element C1 after the electricity recharge unit (103) performs energy transfer.

13. The heating circuit according to claim 11 or 12, wherein, the energy superposition and transfer unit comprises a DC-DC module (4), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the DC-DC module (4), and is designed to control the operation of the DC-DC module (4) to transfer the energy in the charge storage element C1 to the energy storage element, and then superpose the remaining energy in the charge storage element C1 with the energy in the battery.

14. The heating circuit according to one of the claims 9 to 13, wherein, the polarity inversion unit (102) comprises a single pole double throw switch J1 and a single pole double throw switch J2 located on the two ends of the charge storage element C1 respectively; the input wires of the single pole double throw switch J1 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J1 is connected with the first pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch J1 is connected with the second pole plate of the charge storage element C1; the input wires of the single pole double throw switch J2 are connected in the energy storage circuit, the first output wire of the single pole double throw switch J2 is connected with the second pole plate of the charge storage element C1, and the second output wire of the single pole double throw switch J2 is connected with the first pole plate of the charge storage element C1; the switching control module (100) is also connected with the single pole double throw switch J1 and single pole double throw switch J2 respectively, and is designed to invert the voltage polarity of the charge storage element C1 by altering the connection relationships between the respective input wires and output wires of the single pole double throw switch J1 and the single pole double throw switch J2.

15. The heating circuit according to one of the claims 9 to 14, wherein, the polarity inversion unit (102) comprises a one-way semiconductor element D3, a current storage element L2, and a switch K9; the charge storage element C1, current storage element L2, and switch K9 are connected sequentially in series to form a loop; the one-way semiconductor element D3 is connected in series between the charge storage element C1 and the current storage element L2 or between the current storage element L2 and the switch K9; the switching control module (100) is also connected with the switch K9, and is designed to invert the voltage polarity of the charge storage element C1 by controlling the switch K9 to switch on.

16. The heating circuit according to one of the claims 9 to 15, wherein, the polarity inversion unit (102) comprises a first DC-DC module (2) and a charge storage element C2; the first DC-DC module (2) is connected with the charge storage element C1 and the charge storage element C2 respectively; the switching control module (100) is also connected with the first DC-DC module (2), and is designed to transfer the energy in the charge storage element C1 to the charge storage element C2 by controlling the operation of the first DC-DC module (2), and then transfer the energy in the charge storage element C2 back to the charge storage element C1, so as to invert the voltage polarity of the charge storage element C1.

17. The heating circuit according to one of the claims 10 to 16, wherein, the electricity recharge unit (103) comprises a second DC-DC module (3), which is connected with the charge storage element C1 and the battery respectively; the switching control module (100) is also connected with the second DC-DC module (3), and is designed to transfer the energy in the charge storage element C1 to the battery by controlling the operation of the second DC-DC module (3).

18. The heating circuit according to one of the preceding claims, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1 and designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off; the energy consumption unit comprises a voltage control unit (101), which is designed to convert the voltage across the charge storage element C1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off.

19. The heating circuit according to one of the claims 9 to 18, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy superposition unit performs energy superposition; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element C1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy superposition unit performs energy superposition.

20. The heating circuit according to one of the claims 10 to 19, wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy transfer unit performs energy transfer, or consume the energy in the charge storage element C1 after the energy transfer unit performs energy transfer; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element C1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy transfer unit performs energy transfer, or convert the voltage across the charge storage element C1 to a predetermined value of voltage after the energy transfer unit performs energy transfer.

21. The heating circuit according to one of the claims 11 to 20,wherein, the heating circuit further comprises an energy consumption unit, which is connected with the charge storage element C1, and is designed to consume the energy in the charge storage element C1 after the switch unit (1) switches on and then switches off and before the energy superposition and transfer unit performs energy transfer, or consume the energy in the charge storage element after the energy superposition and transfer unit performs energy transfer and before the energy superposition and transfer unit performs energy superposition; the energy consumption unit comprises a voltage control unit (101), which is connected with the charge storage element C1, and is designed to convert the voltage across the charge storage element C1 to a predetermined value of voltage after the switch unit (1) switches on and then switches off and before the energy superposition and transfer unit performs energy transfer, or convert the voltage across the charge storage element C1 to a predetermined value of voltage after the energy superposition and transfer unit performs energy transfer and before the energy superposition and transfer unit performs energy superposition.

22. The heating circuit according to any of Claims 18 to 21, wherein, the voltage control unit (101) comprises a damping element R5 and a switch K8, the damping element R5 and the switch K8 are connected with each other in series, and then connected in parallel across the charge storage element C1; the switching control module (100) is further connected with the switch K8, and is designed to control the switch K8 to switch on after the control switch unit (1) switches on and then switches off.

24. The heating circuit according to one of the preceding claims, wherein, the damping element R1 is the parasitic resistance in the battery, and the current storage element L1 is the parasitic inductance in the battery.

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