GS Yuasa International Ltd.

Japan

GS Yuasa International Ltd.

Japan
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An energy storage apparatus includes: an energy storage device which is connected to a vehicle load and a vehicle power generator; a current interrupt device that causes the energy storage device and the vehicle load as well as the energy storage device and the vehicle power generator to be in a conduction state or in an interruption state; a voltage detection unit that detects voltage of the energy storage device; and a control unit. The control unit executes: a switching instruction process in which, when determining that the electric storage device will reach an overcharge state on the basis of the voltage, the control unit issues an interruption switching instruction to the current interrupt device; and an interruption maintaining process in which, when the number of times of the switching instruction process exceeds a predetermined value, the control unit issues an instruction to maintain the interruption state.

Claims which contain your search:

1. An energy storage apparatus mounted to a vehicle, the energy storage apparatus comprising: an energy storage device which is able to be charged and connected to a vehicle load and a vehicle power generator which are mounted on the vehicle; a current interrupt device that causes the energy storage device and the vehicle load as well as the energy storage device and the vehicle power generator to be in a conduction state or in an interruption state; a voltage detection unit that detects voltage of the energy storage device; and a control unit, wherein the control unit executes: a switching instruction process in which, when determining that the electric storage device will reach an overcharge state or has reached an overcharge state on the basis of the voltage detected by the voltage detection unit, the control unit issues an interruption switching instruction for switching to the interruption state to the current interrupt device; and an interruption maintaining process in which, when the number of times of the switching instruction process exceeds a predetermined value in a predetermined period of time, the control unit determines that the energy storage device is misused, and issues an instruction to maintain the interruption state to the current interrupt device.

2. The energy storage apparatus according to claim 1, comprising a discharge circuit which is connected in parallel with the current interrupt device and includes a diode that allows current to flow toward the vehicle load from the energy storage device.

3. The energy storage apparatus according to claim 2, wherein the discharge circuit includes an auxiliary current interrupt device connected in series with the diode, and the control unit executes both the interruption maintaining process and an auxiliary interruption maintaining process in which an instruction to maintain the interruption state is issued to the auxiliary current interrupt device, when determining that the energy storage device is misused because the number of times of the switching instruction process exceeds a predetermined value in a predetermined period of time, and determining that the vehicle reaches a parked state.

4. The energy storage apparatus according to claim 2, wherein the discharge circuit includes an auxiliary current interrupt device connected in series with the diode, and the control unit executes the interruption maintaining process when determining that the energy storage device is misused because the number of times of the switching instruction process exceeds a predetermined value in a predetermined period of time, and executes an auxiliary interruption maintaining process in which an instruction to maintain the interruption state is issued to the auxiliary current interrupt device, when determining that the vehicle reaches a parked state.

5. The energy storage apparatus according to claim 3, comprising a current detection unit that detects current between the vehicle load and the energy storage device, wherein the control unit determines that the vehicle reaches a parked state when determining that the current detected by the current detection unit has been continuously less than a predetermined value for a predetermined period of time.

6. The energy storage apparatus according to claim 3, wherein the control unit is communicable with a vehicle-side electronic control device provided to the vehicle, and determines that the vehicle reaches a parked state on the basis of whether or not there is communication with the vehicle-side electronic control device.

7. The energy storage apparatus according to claim 3, wherein the control unit is connectable to an external device, and cancels the interruption state of the current interrupt device and the auxiliary current interrupt device on the basis of the communication from the connected external device.

8. The energy storage apparatus according to claim 1, wherein the energy storage device is a lithium ion secondary battery.

9. A method for determining misuse of an energy storage device in an energy storage apparatus which includes: an energy storage device which is able to be charged and connected to a vehicle load and a vehicle power generator which are mounted on the vehicle; a current interrupt device that causes current between the energy storage device and the vehicle load as well as current between the energy storage device and the vehicle power generator to be in a conduction state or in an interruption state; and a voltage detection unit that detects voltage of the energy storage device, the method comprising executing: a switching instruction process in which an interruption switching instruction for switching to the interruption state is issued to the current interrupt device, when it is determined that the energy storage device will reach an overcharge state or has reached an overcharge state on the basis of the voltage detected by the voltage detection unit; and a determination process in which, when the number of times of the switching instruction process exceeds a predetermined value in a predetermined period of time, it is determined that the energy storage device is misused.


Patent
GS Yuasa International Ltd. | Date: 2017-01-04

Provided is an energy storage apparatus which includes a first energy storage device having a first terminal which is either a positive electrode terminal or a negative electrode terminal, wherein the energy storage apparatus further includes a terminal neighboring member which is disposed adjacently to the first terminal of the first energy storage device, and the terminal neighboring member includes: a first housing portion capable of housing a first conductive member which connects the first terminal and a second terminal which a second energy storage device different from the first energy storage device has to each other; and a first lead-out portion capable of leading out a second conductive member which connects the first terminal and a third terminal which a third energy storage device different from the first energy storage device and the second energy storage device has to each other from the first housing portion.

Claims which contain your search:

1. An energy storage apparatus comprising:a first energy storage device including a first terminal that is either a positive electrode terminal or a negative electrode terminal; anda terminal neighboring member that is disposed adjacently to the first terminal of the first energy storage device,wherein the terminal neighboring member includes:a first housing portion capable of housing a first conductive member that connects the first terminal and a second terminal, which a second energy storage device has, to each other; anda first lead-out portion capable of leading out, from the first housing portion, a second conductive member that connects the first terminal and a third terminal, which a third energy storage device has, to each other.

2. The energy storage apparatus according to claim 1, wherein the first housing portion and the first lead-out portion are opening portions that penetrate different portions of the terminal neighboring member in different directions.

3. The energy storage apparatus according to claim 1 or 2, wherein the terminal neighboring member includes a wall formed on an outer periphery of the first housing portion,wherein the first lead-out portion is formed on the wall.

4. The energy storage apparatus according to any one of claims 1 to 3, wherein the terminal neighboring member further includes:a second housing portion capable of housing a third conductive member that connects the third terminal and a fourth terminal, which is a terminal different from the second terminal of the second energy storage device, to each other; anda second lead-out portion being disposed closer to the second housing portion than the first lead-out portion and capable of leading out the second conductive member from the second housing portion.

5. The energy storage apparatus according to any one of claims 1 to 4, wherein the second energy storage device is an energy storage device disposed at a position disposed adjacently to the first energy storage device,wherein the third energy storage device is an energy storage device disposed at a position different from the position disposed adjacently to the first energy storage device, andwherein the energy storage apparatus includes the third energy storage device without including the second energy storage device, and includes the second conductive member without including the first conductive member.

6. An energy storage apparatus comprising:a first energy storage device including a first terminal that is either a positive electrode terminal or a negative electrode terminal;an outer connection terminal; anda terminal neighboring member that is disposed adjacently to a first terminal side of the first energy storage device,wherein the terminal neighboring member includes:a conductor housing portion capable of housing a first conductive member that connects the first terminal and a second terminal, which a second energy storage device has, to each other; anda first lead-out portion capable of leading out, from the conductor housing portion, a second conductive member that connects the first terminal and the outer connection terminal to each other.

7. The energy storage apparatus according to claim 6, whereinthe conductor housing portion is a bus bar arranging opening portion capable of housing a bus bar that connects the first terminal and the second terminal to each other as the first conductive member,the first lead-out portion is a terminal connecting opening portion from which the second conductive member is configured to be led out toward the outer connection terminal from the first terminal, andthe bus bar arranging opening portion and the terminal connecting opening portion are opening portions that penetrate different portions of the terminal neighboring member in different directions.

8. The energy storage apparatus according to claim 6 or 7, whereinthe terminal neighboring member includes a wall formed on an outer periphery of the conductor housing portion,wherein the first lead-out portion is formed on the wall.

9. The energy storage apparatus according to any one of claims 6 to 8, wherein the terminal neighboring member further includes a second lead-out portion capable of leading out a third conductive member that connects the outer connection terminal and a third terminal, which a second energy device has, to each other.

10. The energy storage apparatus according to any one of claims 6 to 9, wherein the energy storage apparatus includes an energy storage device housing portion in which the second energy storage device is housed,wherein the energy storage device housing portion is a housing portion for an energy storage device that is disposed at a position adjacently to the first energy storage device and closest to the outer connection terminal.

11. The energy storage apparatus according to any one of claims 6 to 10, wherein the first terminal and the outer connection terminal are connected to each other without being connected to the second terminal and the third terminal.


A first projecting portion is disposed between a head portion of an external terminal and a gasket body of a gasket, the first projecting portion projecting toward the gasket body from a first opposedly-facing surface which opposedly faces a case of the head portion, the first projecting portion surrounding the shaft portion, the first projecting portion having a pressing surface which directly or indirectly presses the gasket body in a projecting direction of the first projecting portion. The gasket has the second and third opposedly-facing surfaces, the second opposedly-facing surface opposedly facing the head portion, the third opposedly-facing surface opposedly facing the case. A second projecting portion is disposed in a region of at least one of the second and third opposedly-facing surfaces which correspond to the first projecting portion, the second projecting portion surrounding the shaft portion and being in a state where the second projecting portion is compressed toward the second or third opposedly-facing surface by the pressing surface.

Claims which contain your search:

1. An energy storage device comprising: a case; an external terminal having a head portion disposed outside the case and a shaft portion extending from the head portion and penetrating the case; and a gasket having a gasket body disposed at least between the case and the head portion, wherein the head portion has a first opposedly-facing surface extending along an outer surface of the case and opposedly facing the gasket body, the gasket has second and third opposedly-facing surfaces, the second opposedly-facing surface opposedly facing the head portion, the third opposedly-facing surface opposedly facing the case, a first projecting portion is disposed between the head portion and the gasket body, the first projecting portion projecting toward the gasket body from the first opposedly-facing surface and surrounding the shaft portion, the first projecting portion having a pressing surface which directly or indirectly presses the gasket body in a projecting direction of the first projecting portion, and a second projecting portion is disposed in a region of at least one of the second and third opposedly-facing surfaces which correspond to the first projecting portion, the second projecting portion surrounding the shaft portion and being in a state where the second projecting portion is compressed toward the second or third opposedly-facing surface by the pressing surface.

2. The energy storage device according to claim 1, wherein the second projecting portion is in a state where the second projecting portion is collapsed by the pressing surface, and a projection area of the second projecting portion in a direction that the shaft portion extends is smaller than a projection area of the pressing surface in the direction that the shaft portion extends.

3. The energy storage device according to claim 1, wherein the second projecting portion is disposed on the second opposedly-facing surface and the third opposedly-facing surface of the gasket body.

4. The energy storage device according to claim 1, wherein the first projecting portion is disposed adjacently to the shaft portion.

5. The energy storage device according to claim 4, wherein the head portion and the first projecting portion are integrally formed with each other to construct a terminal head, and a thickness of the terminal head where the first projecting portion is formed in the direction that the shaft portion extends is set larger than corresponding thicknesses of other portions of the terminal head.

6. The energy storage device according to claim 4, wherein the case has a recessed portion indented toward an inside of the case on a peripheral edge portion around a hole through which the shaft portion is made to pass, an outer edge of the recessed portion corresponds to an outer edge of the first projecting portion as viewed from the direction that the shaft portion extends, and in the direction that the shaft portion extends, a distance between the pressing surface and a bottom portion of the recessed portion is set smaller than a distance between the first opposedly-facing surface and an opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface.

7. The energy storage device according to claim 1, wherein a distance between the first opposedly-facing surface and the opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface is larger than a thickness of the gasket body in the direction that the shaft portion extends, the gasket body being positioned between the first opposedly-facing surface and the opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface.

8. The energy storage device according to claim 1, wherein between the first opposedly-facing surface and the opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface, a space is formed at least either one of between the head portion and the gasket body or between the gasket body and the case.

9. The energy storage device according to claim 1, wherein between the first opposedly-facing surface and the opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface, the head portion and the gasket body are not in contact with each other or the gasket body and the case are not in contact with each other.

10. The energy storage device according to claim 1, wherein the external terminal has, along an inner surface of the case, a large diameter portion extending from the shaft portion, the large diameter portion sandwiching, in the direction that the shaft portion extends, the gasket body and the case in cooperation with the first projecting portion, and the large diameter portion extends to or outward of a position of the second projecting portion as viewed in the direction that the shaft portion extends.

11. The energy storage device according to claim 1, wherein a region of the case which corresponds to the first projecting portion is in a state where the region is hardened by working.

12. The energy storage device according to claim 1, wherein the gasket body and the second projecting portion are integrally formed with each other.

13. The energy storage device according to claim 1, wherein the external terminal is made of a material which contains at least one of aluminum, an aluminum alloy, copper and a copper alloy.

14. The energy storage device according to claim 1, wherein the gasket is made of a material which contains a polyphenylene sulfide resin or a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin.

15. The energy storage device according to claim 1, wherein the external terminal includes a positive electrode external terminal and a negative electrode external terminal, and as viewed in the direction that the shaft portion extends, the head portion of the negative electrode external terminal is larger than the head portion of the positive electrode external terminal.

16. An energy storage device comprising: a case; an external terminal having a head portion disposed outside the case and a shaft portion extending from the head portion and penetrating the case; and a gasket having a gasket body disposed at least between the case and the head portion, wherein the head portion has a first opposedly-facing surface extending along an outer surface of the case and opposedly facing the gasket body, the gasket has second and third opposedly-facing surface, the second opposedly-facing surface opposedly facing the head portion, the third opposedly-facing surface opposedly facing the case, a first projecting portion is disposed between the head portion and the gasket body, the first projecting portion projecting toward the gasket body from the first opposedly-facing surface and surrounding the shaft portion, the first projecting portion having a pressing surface which directly or indirectly presses the gasket body in a projecting direction of the first projecting portion, a second projection portion is disposed in a region of at least one of the second and third opposedly-facing surface which correspond to the first projecting portion, in a state where the gasket body is not compressed by the pressing surface, the second projecting portion is disposed in such a manner that the second projecting portion projects in a direction away from the gasket body and surrounds the shaft portion, and in a state where the gasket body is compressed by the pressing surface, the second projecting portion surrounding the shaft portion and being in a state where the second projecting portion is compressed toward the second or third opposedly-facing surface by the pressing surface.

17. The energy storage device according to claim 16, wherein a distance between the first opposedly-facing surface and an opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface is larger than a thickness of the gasket body in the direction that the shaft portion extends, the gasket body positioned between the first opposedly-facing surface and the opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface.

18. The energy storage device according to claim 16, wherein between the first opposedly-facing surface and the opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface, a space is formed at least either one of between the head portion and the gasket body or between the gasket body and the case.

19. The energy storage device according to claim 16, wherein between the first opposedly-facing surface and the opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface, the head portion and the gasket body are not in contact with each other or the gasket body and the case are not in contact with each other.

20. An energy storage device comprising: a case; an external terminal having a head portion disposed outside the case and a shaft portion extending from the head portion and penetrating the case; and a gasket having a gasket body disposed at least between the case and the head portion, wherein the head portion has a first opposedly-facing surface extending along an outer surface of the case and opposedly facing the gasket body, the gasket has second and third opposedly-facing surfaces, the second opposedly-facing surface opposedly facing the head portion, the third opposedly-facing surface opposedly facing the case, a first projecting portion is disposed between the head portion and the gasket body, the first projecting portion projecting toward the gasket body from the first opposedly-facing surface and surrounding the shaft portion, the first projecting portion having a pressing surface which directly or indirectly presses the gasket body in a projecting direction of the first projection portion, a second projecting portion is disposed in a region of at least one of the second and third opposedly-facing surfaces which correspond to the first projecting portion, the second projecting portion surrounding the shaft portion and being in a state where the second or third opposedly-facing surface by the pressing surface, a distance between the first opposedly-facing surface and an opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface is larger than a thickness of the gasket body in a direction that the shaft portion extends, the gasket body positioned between the first opposedly-facing surface and the opposedly-facing surface of the case which opposedly faces the first opposedly-facing surface, the external terminal has, along an inner surface of the case, a large diameter portion extending from the shaft portion, the large diameter portion sandwiching, in the direction that the shaft portion extends, the gasket body and the case in cooperation with the first projecting portion, and the large diameter portion extends to or outward of a position of the second projecting portion as viewed in the direction that the shaft portion extends.

21. An energy storage apparatus comprising: the energy storage devices according to claim 1; and a bus bar member which electrically connects the energy storage devices to each other.

22. A method of manufacturing an energy storage device comprising the steps of: causing a shaft portion of an external terminal, which includes a head portion and the shaft portion extending from the head portion, to penetrate a case of the energy storage device such that a gasket body of a gasket is disposed between the head portion and the case, the gasket having second and third opposedly-facing surfaces, the second opposedly-facing surface opposedly facing the head portion, the third opposedly-facing surface opposedly facing the case; forming a large diameter portion, which extends from the shaft portion along an inner surface of the case, by swaging a distal end portion of the shaft portion to sandwich the gasket body and the case between the first projecting portion and the large diameter portion; disposing a first projecting portion between the head portion and the gasket body by causing the shaft portion to penetrate the case, the first projecting portion projecting toward the gasket from a first opposedly-facing surface of the head portion which extends along an outer surface of the case and opposedly faces the gasket, the first projecting portion surrounding the shaft portion, the first projecting portion having a pressing surface which directly or indirectly presses the gasket body in a projecting direction of the first projecting portion; disposing a second projecting portion in a region of at least one of the second and third opposedly-facing surfaces which correspond to the first projecting portion, the second projecting portion projecting in a direction away from the gasket body from at least one of the second and third opposedly-facing surface; and forming the large diameter portion to compress the second projecting portion by the pressing surface toward the second or third opposedly-facing surface.


Patent
GS Yuasa International Ltd. | Date: 2017-02-01

Disclosed is an energy storage apparatus which includes: an energy storage device; an outer case which accommodates the energy storage device; a partition plate which is disposed between the energy storage device and a side wall of the outer case; and a discharge portion which is disposed on the outer case, the discharge portion having one or more openings through which a gas, which has passed through a flow passage formed between the partition plate and the side wall, is discharged from the outer case.

Claims which contain your search:

1. An energy storage apparatus comprising:an energy storage device;an outer case which accommodates the energy storage device;a partition plate which is disposed between the energy storage device and a side wall of the outer case; anda discharge portion which is disposed on the outer case, the discharge portion having one or more openings through which a gas, which has passed through a flow passage formed between the partition plate and the side wall, is discharged from the outer case.

2. The energy storage apparatus according to claim 1, wherein at least a portion of the discharge portion is disposed on a lower portion of the side wall.

3. The energy storage apparatus according to claim 1 or 2, wherein at least a portion of the discharge portion is arranged on a lower wall of the outer case.

4. The energy storage apparatus according to any one of claims 1 to 3, wherein a first guide portion which is disposed adjacently to the discharge portion is further provided such that the first guide portion extends in a first direction, which intersects with the partition plate and the side wall, between the partition plate and the side wall.

5. The energy storage apparatus according to claim 4, wherein the outer case includes: a body having an opening; and a lid body disposed so as to close the opening, the first guide portion is disposed in the body, andthe lid body includes a second guide portion which is continuously formed with the first guide portion in a second direction which intersects with the first direction.

6. The energy storage apparatus according to claim 4 or 5, wherein the outer case further includes a third guide portion which is formed on an upper wall of the outer case in a projecting manner toward the energy storage device, and guides the gas discharged from the energy storage device toward the first guide portion.

7. The energy storage apparatus according to any one of claims 1 to 6, wherein a plurality of the energy storage devices are accommodated in the outer case, and the discharge portion is positioned in a direction that the plurality of energy storage devices are arranged in a row as viewed from the energy storage devices.

8. The energy storage apparatus according to any one of claims 1 to 7, wherein the partition plate is connected to a lower wall of the outer case.

9. The energy storage apparatus according to any one of claims 1 to 8, wherein the partition plate has a first surface which directly opposedly faces the energy storage device and a second surface which directly opposedly faces the flow passage.

10. An energy storage apparatus comprising:an energy storage device;an outer case which accommodates the energy storage device; anda discharge portion formed on the outer case, the outer case having one or more openings through which a gas, which has passed through a flow passage formed by ribs formed on a lid body that the outer case includes, is discharged from the outer case.

11. The energy storage apparatus according to claim 10, wherein a plurality of the energy storage devices are accommodated in the outer case,the rib includes: a horizontal guide portion which is formed on an upper wall of the lid body in a projecting manner toward the energy storage device, and extends in a first direction along which the plurality of energy storage devices are arranged in a row; and a vertical guide portion which is formed on the upper wall and a side wall of the lid body in a projecting manner and is arranged on a side of the energy storage device that is disposed on an end portion of the lid body in the first direction.

12. The energy storage apparatus according to any one of claims 1 to 11, wherein the energy storage device includes a discharge valve for discharging a gas, andthe discharging portion is positioned below the discharge valve.

13. The energy storage apparatus according to claim 12, wherein the outer case has two side walls which opposedly face each other, and said two side walls define a flow passage space, in which the flow passage is disposed, and an equipment arranging space, in which electric equipment is disposed, in corporation with two partition plates disposed in the outer case adjacently to said two side walls respectively.

14. The energy storage apparatus according to claim 13, wherein the partition plate which defines the equipment arranging space is configured to block the inflow of a gas discharged from the discharge valve of the energy storage device to the equipment arranging space.


A performance deterioration detecting apparatus configured to detect a performance deterioration start state of an energy storage device. The performance deterioration start state is an initial state of deterioration in performance of the energy storage device. The apparatus includes a performance deterioration determiner configured to determine that the energy storage device is in the performance deterioration start state based on a displacement of peak position in a capacity-voltage property of the energy storage device with time. The capacity-voltage property indicates a relation between a capacity variation amount (dQ/dV) and a voltage (V).

Claims which contain your search:

1. A performance deterioration detecting apparatus configured to detect a performance deterioration start state of an energy storage device, wherein the performance deterioration start state is an initial state of deterioration in performance of the energy storage device, the apparatus comprising: a performance deterioration determiner configured to determine that the energy storage device is in the performance deterioration start state based on a displacement of peak position in a capacity-voltage property of the energy storage device with time, wherein the capacity-voltage property indicates a relation between a capacity variation amount (dQ/dV) and a voltage (V).

2. The performance deterioration detecting apparatus according to claim 1, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in chargeable or dischargeable capacity of the energy storage device.

3. The performance deterioration detecting apparatus according to claim 1, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in input-output performance indicated by an input-output property of the energy storage device.

4. An energy storage system comprising: an energy storage device; and the performance deterioration detecting apparatus according to claim 1.

5. The energy storage system according to claim 4, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in chargeable or dischargeable capacity of the energy storage device.

6. The energy storage system according to claim 4, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in input-output performance indicated by an input-output property of the energy storage device.

7. The energy storage system according to claim 4, wherein a maximum current flowing the energy storage device is limited if the performance deterioration determiner determines that the energy storage device is in the performance deterioration start state.

8. The energy storage system according to claim 4, further comprising: a vehicle on which the energy storage device is mounted.

9. The energy storage system according to claim 8, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in input-output performance indicated by an input-output property of the energy storage device.

10. The energy storage system according to claim 4, wherein the energy storage device comprises a lithium-ion secondary battery.

11. A performance deterioration detecting method of detecting a performance deterioration start state of an energy storage device, wherein the performance deterioration start state is an initial state of deterioration in performance of the energy storage device, the method comprising: determining, by a performance deterioration determiner, that the energy storage device is in the performance deterioration start state based on a displacement of peak position in a capacity-voltage property of the energy storage device with time, wherein the capacity-voltage property indicates a relation between a capacity variation amount (dQ/dV) and a voltage (V).


Patent
GS Yuasa International Ltd. | Date: 2016-05-26

An energy storage device includes a positive electrode and a negative electrode. The negative electrode includes graphite and non-graphitizable carbon, and a D50 particle size of the graphite at which a cumulative volume in a particle size distribution of a particle size reaches 50% is 2 m or more. A ratio of a mass of the non-graphitizable carbon to a total amount of a mass of the graphite and a mass of the non-graphitizable carbon is 5% by mass or more and 45% by mass or less and a ratio of the D50 particle size of the graphite to a D50 particle size of the non-graphitizable carbon is 1.02 or less.

Claims which contain your search:

1. An energy storage device comprising: a positive electrode; and a negative electrode, wherein the negative electrode comprises graphite and non-graphitizable carbon, a D50 particle size of the graphite at which a cumulative volume in a particle size distribution of a particle size reaches 50% is 2 m or more, a ratio of a mass of the non-graphitizable carbon to a total amount of a mass of the graphite and a mass of the non-graphitizable carbon is 5% by mass or more and 45% by mass or less, and a ratio of the D50 particle size of the graphite to a D50 particle size of the non-graphitizable carbon is 1.02 or less.

2. The energy storage device according to claim 1, wherein the D50 particle size of the graphite is 2 m or more and 6.3 m or less.

3. The energy storage device according to claim 1, wherein the D50 particle size of the graphite is 2 m or more and 4.5 m or less.

4. The energy storage device according to claim 1, wherein a ratio of a mass of the non-graphitizable carbon to a total amount of a mass of the graphite and a mass of the non-graphitizable carbon is 5% by mass or more and 20% by mass or less.

5. The energy storage device according to claim 4, wherein the D50 particle size of the non-graphitizable carbon is 2 m or more and 4.5 m or less.

6. The energy storage device according to claim 1 wherein a ratio of a mass of the non-graphitizable carbon to a total amount of a mass of the graphite and a mass of the non-graphitizable carbon is 15% by mass or more and 20% by mass or less.

7. The energy storage device according to claim 1, wherein the negative electrode further comprises an aqueous binder.

8. The energy storage device according to claim 1, wherein the negative electrode comprises at least one of methyl cellulose, carboxymethyl cellulose, a sodium salt or an ammonium salt of methyl cellulose, and a sodium salt or an ammonium salt of carboxymethyl cellulose.

9. The energy storage device according to claim 1, further comprising: a first separator; and a second separator, wherein the positive electrode, the first separator, the negative electrode, and the second separator are wound in a state of being superimposed.

10. The energy storage device according to claim 1, further comprising: a separator, wherein the positive electrode includes a plurality of positive electrodes, the negative electrode includes a plurality of negative electrodes, and the plurality of positive electrodes and the plurality of negative electrodes are superimposed with the separator arranged therebetween.

11. An energy storage apparatus comprising a plurality of the energy storage devices according to claim 1.


Patent
GS Yuasa International Ltd. | Date: 2016-05-26

A battery pack includes: energy storage devices arranged with a gap which is formed between the energy storage devices for passing a fluid; a case configured to accommodate the energy storage devices; a first duct disposed in an inside of the case and defining a supply flow passage through which the fluid is supplied to the gap; and a second duct disposed in the inside of the case and defining a discharge flow passage through which the fluid which has passed through the gap is discharged, wherein an auxiliary flow passage where the fluid flows along an outer surface of the first duct is formed, and the fluid is made to flow through the supply flow passage and the auxiliary flow passage at a same time.

Claims which contain your search:

1. A battery pack comprising: a plurality of energy storage devices arranged with a gap which is formed between the energy storage devices for passing a fluid; a case configured to accommodate the plurality of energy storage devices; a first duct disposed in an inside of the case and defining a supply flow passage through which the fluid is supplied to the gap; and a second duct disposed in the inside of the case and defining a discharge flow passage through which the fluid which has passed through the gap is discharged, wherein an auxiliary flow passage where the fluid flows along an outer surface of the first duct is formed, and the fluid is made to flow through the supply flow passage and the auxiliary flow passage at a same time.

2. The battery pack according to claim 1, wherein the plurality of energy storage devices are arranged in a row in a first direction, the first duct extends in the first direction and faces in an opposed manner the plurality of energy storage devices in a second direction which is orthogonal to the first direction, and the auxiliary flow passage is defined by the case and the outer surface of the first duct.

3. The battery pack according to claim 2, wherein each of the energy storage devices includes a battery module where the energy storage devices are stacked in a third direction orthogonal to the first and second directions by way of a spacer, and an air flow passage is formed between the spacer and the energy storage device disposed adjacently to the spacer.

4. The battery pack according to claim 3, wherein the air flow passage extends parallel to a direction along which external terminals in each energy storage device are arranged.

5. The battery pack according to claim 3, wherein the first duct extends in the first direction and the third direction and faces the battery module in an opposed manner.

6. The battery pack according to claim 1, wherein the flow direction of the fluid in the supply flow passage and the flow direction of the fluid in the auxiliary flow passage are substantially equal.

7. The battery pack according to claim 1, wherein the first duct includes a branching portion which makes the supply flow passage and the auxiliary flow passage communicate with each other, and the branching portion is disposed at a position upstream of a position where the first duct reaches the energy storage device in the flow direction of the fluid in the supply flow passage.

8. The battery pack according to claim 1, wherein the second duct includes a merging portion which makes the auxiliary flow passage and the discharge flow passage communicate with each other, and the merging portion is disposed at a position downstream of the first duct in the flow direction of the fluid in the auxiliary flow passage.

9. The battery pack according to claim 8, wherein the second duct has a valve which opens and closes the merging portion.

10. The battery pack according to claim 8, wherein the second duct has a suction portion.

11. The battery pack according to claim 1, wherein the first duct has a metal duct wall.

12. A vehicle equipped with the battery pack according to claim 1.

14. A method of cooling a battery pack comprising: supplying a fluid to a plurality of energy storage devices accommodated in an inside of a case and disposed with a gap, which is formed between the energy storage devices, through a first duct disposed in the inside of the case; discharging the fluid, which has passed through the gap, through a second duct disposed in the inside of the case; allowing the fluid to flow through an auxiliary passage which extends along an outer surface of the first duct through a branching portion formed on the first duct; and supplying the fluid which has passed through the auxiliary flow passage to the second duct through a merging portion formed on the second duct and discharging the fluid which has passed through the auxiliary flow passage through the second duct.

15. The method of cooling a battery pack according to claim 14, wherein a suction portion mounted on the second duct is operated, a valve which opens and closes the merging portion is opened, and the fluid flows to the auxiliary flows passage through the branching portion formed on the first duct.


Patent
GS Yuasa International Ltd. | Date: 2015-09-02

An energy storage apparatus includes: one or more energy storage devices; and a first outer covering and a second outer covering arranged outside said one or more energy storage devices. The energy storage apparatus further includes: a weld portion which is a joint portion between the first outer covering and the second outer covering formed by joining the first outer covering and the second outer covering to each other by welding; a heat-susceptible object; and a heat shielding portion arranged between the weld portion and the heat-susceptible object.

Claims which contain your search:

1. An energy storage apparatus comprising: one or more energy storage devices; a first outer covering and a second outer covering arranged outside said one or more energy storage devices; a weld portion which is a joint portion between the first outer covering and the second outer covering formed by joining the first outer covering and the second outer covering to each other by welding; a heat-susceptible object; and a heat shielding portion arranged between the weld portion and the heat-susceptible object.

2. The energy storage apparatus according to claim 1, wherein the first outer covering includes a first projecting portion which projects toward the second outer covering as the heat shielding portion.

3. The energy storage apparatus according to claim 2, wherein the first outer covering or the second outer covering includes a second projecting portion arranged so as to sandwich the weld portion between the first projecting portion and the second projecting portion.

4. The energy storage apparatus according to claim 3, wherein the second projecting portion is formed on the first outer covering, and the first projecting portion has a larger height than the second projecting portion.

5. The energy storage apparatus according to claim 1, wherein the heat shielding portion is arranged away from the heat-susceptible object.

6. The energy storage apparatus according to claim 1, wherein the heat shielding portion includes a heat insulating portion formed using a heat insulating material.

7. The energy storage apparatus according to claim 1, wherein the heat-susceptible object includes a printed circuit board electrically connected to the energy storage device.

8. The energy storage apparatus according to claim 7, wherein the printed circuit board is arranged between the energy storage device and the weld portion at a position closer to the weld portion than the energy storage device.

9. The energy storage apparatus according to claim 1, wherein the heat-susceptible object includes a non-aqueous electrolytic secondary battery which is the energy storage device.

10. The energy storage apparatus according to claim 1, wherein the heat-susceptible object includes the energy storage device having a lid portion arranged close to the weld portion.

11. The energy storage apparatus according to claim 1, wherein the heat-susceptible object includes a resin-made frame body.

12. An energy storage apparatus comprising: one or more energy storage devices; a first outer covering and a second outer covering arranged outside said one or more energy storage devices; a weld portion which is a joint portion between the first outer covering and the second outer covering formed by joining the first outer covering and the second outer covering to each other by welding; a first projecting portion formed on the first outer covering and projecting toward the second outer covering; and a second projecting portion formed on the first outer covering or the second outer covering, and arranged so as to sandwich the weld portion between the first projecting portion and the second projecting portion.

13. The energy storage apparatus according to claim 12, wherein the first outer covering is configured such that, with the weld portion interposed between the first projecting portion and the second projecting portion, the first projecting portion is disposed inside the weld portion and the second projecting portion is disposed outside the weld portion, and the first projecting portion has the larger height than the second projecting portion.

14. A method of manufacturing an energy storage apparatus which includes: one or more energy storage devices; a first outer covering and a second outer covering arranged outside the above-mentioned one or more energy storage devices; a heat-susceptible object; and a heat shielding portion, the method comprising: heating a joint portion between the first outer covering and the second outer covering, the joint portion being arranged so as to sandwich the heat shielding portion between the joint portion and the heat-susceptible object; and joining by welding the first outer covering and the second outer covering at the joint portion.


An energy storage device management method for deciding an SOC estimated value includes: preparing first and second SOC estimation methods for estimating an SOC; and employing a predetermined value as the SOC estimated value when a first SOC region and a second SOC region are different. V-SOC correlation between a voltage and the state of charge of the energy storage device is sectioned into a plurality of SOC regions. The first SOC region is the SOC region that the SOC estimated by the first SOC estimation method belongs to, and the second SOC region is the SOC region that the SOC estimated by the second SOC estimation method belongs to. The predetermined value is set to a value close to a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, or a value between the boundary value and an intermediate value of the second SOC region.

Claims which contain your search:

1. An energy storage device management method for deciding an SOC estimated value, which is a value indicating a state of charge of an energy storage device, comprising: preparing first and second SOC estimation methods for estimating an SOC of the energy storage device in ways different from each other; and employing a predetermined value as the SOC estimated value when a first SOC region and a second SOC region are different from each other, wherein a V-SOC correlation between a voltage and the state of charge of the energy storage device is sectioned into a plurality of SOC regions, the first SOC region is the SOC region that the SOC estimated by the first SOC estimation method belongs to, and the second SOC region is the SOC region that the SOC estimated by the second SOC estimation method belongs to, and the predetermined value is set to 1) a value close to a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, or 2) a value between the boundary value and an intermediate value of the second SOC region.

2. The energy storage device management method according to claim 1, wherein the first SOC estimation method is a method in which the SOC of the energy storage device is estimated, using data obtained by measuring a current flowing in/from the energy storage device, and the second SOC decision method is a method in which the SOC of the energy storage device is estimated, using data obtained by measuring the voltage of the energy storage device.

3. The energy storage device management method according to claim 1, wherein when the first SOC region and the second SOC region are same, the SOC estimated based on the first SOC estimation method is employed as the SOC estimated value.

4. The energy storage device management method according to claim 1, wherein one of the SOC regions is a region corresponding to a voltage flat region in which as to the voltage of the energy storage device, change of the voltage to the change of the SOC in the V-SOC correlation is smaller than that in an other region.

5. An energy storage device management apparatus, comprising: an information processor that outputs an SOC estimated value, which is a value indicating a state of charge of an energy storage device, and executes first and second SOC estimation methods for estimating an SOC of the energy storage device in ways different from each other, wherein a V-SOC correlation between a voltage and the state of charge of the energy storage device is sectioned into a plurality of SOC regions, the information processor employs a predetermined value as the SOC estimated value when a first SOC region and a second SOC region are different from each other, the first SOC region being the SOC region that the SOC estimated by the first SOC estimation method belongs to, and the second SOC region being the SOC region that the SOC estimated by the second SOC estimation method belongs to, and the predetermined value is set to 1) a value close to a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, or 2) a value between the boundary value and an intermediate value of the second SOC region.

6. The energy storage device management apparatus according to claim 5, wherein the first SOC estimation method is a method in which the SOC of the energy storage device is estimated, using data obtained by measuring a current flowing in/from the energy storage device, and the second SOC estimation method is a method in which the SOC of the energy storage device is estimated, using data obtained by measuring the voltage of the energy storage device.

7. The energy storage device management apparatus according to claim 5, wherein when the first SOC region and the second SOC region are same, the SOC estimated based on the first SOC estimation method is employed as the SOC estimated value.

8. The energy storage device management apparatus according to claim 5, wherein one of the SOC regions is a region corresponding to a voltage flat region in which as to the voltage of the energy storage device, change of the voltage to the change of the SOC in the V-SOC correlation is smaller than that in an other region.

9. The energy storage device management apparatus according to claim 8, wherein the V-SOC correlation includes information regarding a plurality of the voltage flat regions.

10. The energy storage device management apparatus according to claim 5, wherein the energy storage device is a lithium ion battery including an iron-phosphate based positive active material.

11. An energy storage device module, comprising: an energy storage device; and the energy storage device management apparatus according to claim 5.

12. An energy storage device management program for causing a computer that controls an energy storage device to decide an SOC estimated value, which is a value indicating a state of charge of the energy storage device, the computer executing first and second SOC estimation methods for estimating an SOC of the energy storage device in ways different from each other, wherein the program causes the computer to perform: employing a predetermined value as the SOC estimated value when a first SOC region and a second SOC region are different from each other, wherein a V-SOC correlation between a voltage and the state of charge of the energy storage device is sectioned into a plurality of SOC regions, the first SOC region is the SOC region that the SOC estimated by the first SOC estimation method belongs to, and the second SOC region is the SOC region that the SOC estimated by the second SOC estimation method belongs to, and the predetermined value is set to 1) a value close to a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, or 2) a value between the boundary value and an intermediate value of the second SOC region.

13. A movable body, comprising: an energy storage device; and the energy storage device management apparatus according to claim 5.


A current integration method in which an SOC of an energy storage device is estimated by time integration of a current flowing in/from the energy storage device, and an OCV method in which an SOC is estimated, based on a V-SOC correlation between a voltage and a state of charge of the energy storage device can be executed. When this V-SOC correlation is sectioned into a plurality of SOC regions, if a first SOC region and a second SOC region are different from each other, a predetermined value of the second SOC region is employed as an SOC estimated value, the first SOC region being the SOC region that the SOC estimated by the current integration method belongs to, and the second SOC region being the SOC region that the SOC estimated by the OCV method belongs to. The predetermined value may be set between a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, and an intermediate value of the second SOC region.

Claims which contain your search:

1. An energy storage device management method for deciding an SOC estimated value, which is a value indicating a state of charge of an energy storage device, comprising:preparing first and second SOC estimation methods for estimating an SOC of the energy storage device in ways different from each other; andemploying a predetermined value as the SOC estimated value when a first SOC region and a second SOC region are different from each other,wherein a V-SOC correlation between a voltage and the state of charge of the energy storage device is sectioned into a plurality of SOC regions,the first SOC region is the SOC region that the SOC estimated by the first SOC estimation method belongs to, and the second SOC region is the SOC region that the SOC estimated by the second SOC estimation method belongs to, andthe predetermined value is set to 1) a value close to a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, or 2) a value between the boundary value and an intermediate value of the second SOC region.

2. The energy storage device management method according to claim 1, wherein the first SOC estimation method is a method in which the SOC of the energy storage device is estimated, using data obtained by measuring a current flowing in/from the energy storage device, and the second SOC decision method is a method in which the SOC of the energy storage device is estimated, using data obtained by measuring the voltage of the energy storage device.

3. The energy storage device management method according to claim 1 or 2, wherein when the first SOC region and the second SOC region are same, the SOC estimated based on the first SOC estimation method is employed as the SOC estimated value.

4. The energy storage device management method according to any one of claims 1 to 3, wherein one of the SOC regions is a region corresponding to a voltage flat region in which as to the voltage of the energy storage device, change of the voltage to the change of the SOC in the V-SOC correlation is smaller than that in an other region.

5. An energy storage device management apparatus, comprising:an information processor that outputs an SOC estimated value, which is a value indicating a state of charge of an energy storage device, and executes first and second SOC estimation methods for estimating an SOC of the energy storage device in ways different from each other,wherein a V-SOC correlation between a voltage and the state of charge of the energy storage device is sectioned into a plurality of SOC regions,the information processor employs a predetermined value as the SOC estimated value when a first SOC region and a second SOC region are different from each other, the first SOC region being the SOC region that the SOC estimated by the first SOC estimation method belongs to, and the second SOC region being the SOC region that the SOC estimated by the second SOC estimation method belongs to, andthe predetermined value is set to 1) a value close to a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, or 2) a value between the boundary value and an intermediate value of the second SOC region.

6. The energy storage device management apparatus according to claim 5, wherein the first SOC estimation method is a method in which the SOC of the energy storage device is estimated, using data obtained by measuring a current flowing in/from the energy storage device, and the second SOC estimation method is a method in which the SOC of the energy storage device is estimated, using data obtained by measuring the voltage of the energy storage device.

7. The energy storage device management apparatus according to claim 5 or 6, wherein when the first SOC region and the second SOC region are same, the SOC estimated based on the first SOC estimation method is employed as the SOC estimated value.

8. The energy storage device management apparatus according to any one of claims 5 to 7, wherein one of the SOC regions is a region corresponding to a voltage flat region in which as to the voltage of the energy storage device, change of the voltage to the change of the SOC in the V-SOC correlation is smaller than that in an other region.

9. The energy storage device management apparatus according to claim 8, wherein the V-SOC correlation includes information regarding a plurality of the voltage flat regions.

10. The energy storage device management apparatus according to any one of claims 5 to 9, wherein the energy storage device is a lithium ion battery including an iron-phosphate based positive active material.

11. An energy storage device module, comprising:an energy storage device; andthe energy storage device management apparatus according to any one of claims 5 to 10.

12. An energy storage device management program for causing a computer that controls an energy storage device to decide an SOC estimated value, which is a value indicating a state of charge of the energy storage device, the computer executing first and second SOC estimation methods for estimating an SOC of the energy storage device in ways different from each other, wherein the program causes the computer to perform:employing a predetermined value as the SOC estimated value when a first SOC region and a second SOC region are different from each other,wherein a V-SOC correlation between a voltage and the state of charge of the energy storage device is sectioned into a plurality of SOC regions,the first SOC region is the SOC region that the SOC estimated by the first SOC estimation method belongs to, and the second SOC region is the SOC region that the SOC estimated by the second SOC estimation method belongs to, andthe predetermined value is set to 1) a value close to a boundary value on a side close to the first SOC region of boundary values sectioning the second SOC region, or 2) a value between the boundary value and an intermediate value of the second SOC region.

13. A movable body, comprising:an energy storage device; andthe energy storage device management apparatus according to any one of claims 5 to 10.

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