Stuttgart, Germany

Robert Bosch GmbH

bosch.com
Stuttgart, Germany

Robert Bosch GmbH , or Bosch, is a German multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart, Germany. It is the world's largest supplier of automotive components measured by 2011 revenues. The company was founded by Robert Bosch in Stuttgart in 1886.Bosch's core products are automotive components , industrial products and building products .Bosch has more than 350 subsidiaries across over 60 countries and its products are sold in around 150 countries. Bosch employs around 306,000 people and had revenues of approximately €52.5 billion in 2012. In 2012 it invested around €4.8 billion in research and development and applied for around 4,800 patents worldwide. In 2009 Bosch was the leader in terms of numbers of patents at the German Patent and Trade Mark Office with 3,213 patents.However, Bosch continued to extend its international footprint through company acquisitions and investments in new plants, and will continue along with this path in 2013. For example, the Bosch Group is planning to set up a manufacturing site for automotive windshield-wiper systems near Belgrade, Serbia. By 2019 some 70 million euros will be invested. Construction work was set to begin in early 2012, with production due to commence at the start of 2013. Initially, some 60 associates will work in manufacturing operations with a floor area of around 22,000 square meters. By 2019 the number of associates is set to rise to some 620. Its objectives are to achieve a better increase in sales than in 2012 and to improve result significantly.Robert Bosch GmbH is privately owned, and 92% of its share capital is held by Robert Bosch Stiftung GmbH, a charitable foundation. The majority of voting rights are held by Robert Bosch Industrietreuhand KG, an industrial trust. The remaining shares are held by the Bosch family and by Robert Bosch GmbH. The Bosch logo represents a simple magneto armature and casing, one of the company's first products. Wikipedia.

SEARCH TERMS
SEARCH FILTERS
Time filter
Source Type

Patent
Robert Bosch GmbH | Date: 2017-07-26

The invention relates to an energy storage unit for a handheld power tool, comprising a housing (14a; 14b, 16b) which has a rebate (22a, 28a; 22b, 28b) on a housing base side (18a) and comprising at least one connection element (32a, 34a; 32b, 34b, 36b, 38b) which is provided for conducting an electrode potential out of the housing (14a; 14b, 16b) through the rebate (22a, 28a; 22b, 28b). According to the invention, the energy storage unit has at least one contact point (40a, 42a; 40b-50b) for electrically contacting the at least one connection element (32a, 34a; 32b, 34b, 36b, 38b), said contact point being arranged at least partly on the rebate (22a, 28a; 22b, 28b).


The invention relates to a frame device (18) for accommodating storage cells (12) of an energy storage module (10), in particular a battery module, comprising two plate-like closure elements (20) which form two ends (22, 24) of the frame device (18) that are opposite one another along an axis (14), connection elements (30) which are arranged on mutually opposite sides (26, 28) of the frame device (18) and which extend from one end (22) to the other end (24) of the frame device (18) and mechanically connect the two closure elements (20) over a distance. For connection to the two closure elements (20), provision is made for each of the connection elements (30) to be provided at each of the ends thereof with a pin (42) which is oriented transversely to the axis (14) and which respectively engages in a cutout (40) in one of the closure elements (20) and is releasably fixed there by means of a respective latch-type securing element (32). The invention further relates to a corresponding energy storage module (10).


The present invention relates to a method for operating an energy storage unit having a plurality of battery cells (1) electrically connected to one another, each battery cell comprising an over-voltage protection device and a cell protection, wherein an adjacent battery cell voltage (14) on each battery cell (1) of the energy storage unit is monitored to determine whether said battery cell voltage is larger than a predetermined cell voltage minimum value (16), wherein the energy storage unit is switched off when the battery cell voltage (14) drops below the cell voltage minimum value (16). Thereby the battery cells (1) are monitored with respect to a triggering of the respective over-voltage protection devices, wherein the energy storage unit is further operated if a battery cell voltage (14) of a battery cell (1) of the energy storage unit exceeds the cell voltage minimum value (16) and the triggering of the over-voltage protection device of this battery cell (1) is thereby detected. The present invention further relates to a battery management system configured to carry out the method and an energy storage unit with such a battery management system.

Claims which contain your search:

1. A method for operating an energy storage unit ( 26) having a plurality of electrically interconnected battery cells ( 1) that each comprise an overvoltage protection apparatus ( 6) and a cell fuse ( 11), wherein a respective battery cell voltage ( 14) applied to a battery cell ( 1) of the energy storage unit ( 26) is monitored for whether it is greater than a prescribed cell voltage minimum value ( 16), the energy storage unit ( 26) being disconnected in the event of a drop in the battery cell voltage ( 14) below the cell voltage minimum value ( 16), characterized in that the battery cells ( 1) are monitored for a tripping of the respective overvoltage protection apparatus ( 6), wherein the energy storage unit ( 26) continues to be operated when a battery cell voltage ( 14) of a battery cell ( 1) of the energy storage unit ( 26) drops below the cell voltage minimum value ( 16) and, in the process, tripping of the overvoltage protection apparatus ( 6) of this battery cell ( 1) is identified.

3. The method as claimed in claim 1, characterized in that a current sensor monitors whether an overcurrent has occurred in the energy storage unit ( 26).

4. The method as claimed in claim 1, characterized in that the battery cells ( 1) are monitored for a tripping of the cell fuse ( 11).

5. The method as claimed in claim 1, characterized in that monitoring of the tripping of the overvoltage protection apparatus ( 6) of a battery cell ( 1) of the energy storage unit ( 26) involves a check being performed to determine whether a cell current ( 15) of the respective battery cell ( 1) has a value not equal to zero amps and a battery cell voltage ( 14) has a voltage value between a lower limit voltage value ( 18) and an upper limit voltage value ( 19), the upper limit voltage value ( 19) being less than the cell voltage minimum value ( 16) and being greater than the lower limit voltage value ( 18).

6. The method as claimed in claim 1, characterized in that in the event of a detected drop in the battery cell voltage ( 14) of a battery cell ( 1) of the energy storage unit ( 26) below the cell voltage minimum value ( 16), the energy storage unit ( 26) is disconnected no earlier than after a predetermined time interval has elapsed, wherein the energy storage unit ( 26) continues to be operated when tripping of the overvoltage protection apparatus ( 6) of this battery cell ( 1) is identified within this time interval.

7. The method as claimed in claim 1, characterized in that an identified tripping of the overvoltage protection apparatus ( 6) of a battery cell ( 1) of the energy storage unit ( 26) is written to a fault memory as an event.

8. The method as claimed in claim 1, characterized in that an identified tripping of the overvoltage protection apparatus ( 6) of a battery cell ( 1) of the energy storage unit ( 26) is signaled.

9. A battery management system for monitoring and regulating operation of an energy storage unit ( 26) having a plurality of electrically interconnected battery cells ( 1), characterized in that the battery management system is designed to perform a method as claimed in claim 1.

10. An energy storage unit ( 26) having a multiplicity of electrically interconnected battery cells ( 1) and a battery management system for monitoring and regulating operation of the energy storage unit ( 26), characterized in that the battery management system is a battery management system as claimed in claim 9.


An electrochemical energy storage cell is configured to repeatedly store electrical energy, and includes two electrodes, and at least one reference electrode element to enable determining an electrode potential of at least one of the two electrodes. A rechargeable battery, and in particular to a rechargeable lithium-ion battery, includes the electrochemical energy storage cell, and is configured to supply electrical energy to an electrical load. A method includes determining an electrode potential of at least one of the two electrodes with reference to the at least one reference electrode element.

Claims which contain your search:

1. An electrochemical energy storage cell configured to repeatedly store electrical energy, comprising: a cell core; an electrode winding that is disposed around the cell core, and that includes:at least two electrodes; andat least one separator positioned between the at least two electrodes; and a reference electrode element that enables determining an electrode potential of at least one of the at least two electrodes.

2. The electrochemical energy storage cell according to claim 1, wherein the cell core is defined by (i) a winding mandrel, (ii) a winding blade, or (iii) a deformable plastic film winding core.

3. The electrochemical energy storage cell according to claim 1, further comprising a housing that surrounds the electrode winding, at least in sections, and that defines the reference electrode element.

4. The electrochemical energy storage cell according to claim 1, further comprising a housing that surrounds the electrode housing, at least in sections, wherein the reference electrode is positioned on an inner surface of the housing.

5. The electrochemical energy storage cell according to claim 1, further comprising: a retainer element that surrounds the electrode winding, at least in sections; and a housing which surrounds the retainer element, at least in sections; wherein:the reference electrode element is arranged on or in the retainer element; andthe retainer element is in contact with the housing, at least in sections.

6. The electrochemical energy storage cell according to claim 1, further comprising a housing which surrounds the electrode winding, at least in sections, wherein: the cell core is defined by a deformable plastic film winding core which is in contact with the housing, at least in sections; and the reference electrode element is arranged on the plastic film winding core.

7. The electrochemical energy storage cell according to claim 1, further comprising: a housing which surrounds the electrode winding, at least in sections; and at least one of (i) measurement lines, and (ii) communication lines that enable determining a reference electrode value, and that are arranged on an outer wall of the housing.

8. The electrochemical energy storage cell according to claim 1, further comprising a housing which surrounds the electrode winding, at least in sections, wherein: the housing is operatively connected to one of the at least two electrodes; and the reference electrode element is insulated from the housing.

9. A rechargeable battery that is configured to supply electrical energy to an electrical load, the rechargeable battery comprising: at least one electrochemical energy storage cell that includes:a cell core;an electrode winding that is disposed around the cell core, and that includes:a reference electrode element that enables determining an electrode potential of at least one of the at least two electrodes.

10. A method, comprising: transmitting reference electrode values of a reference electrode element to an evaluating unit via at least one of (i) measurement and (ii) communication lines, wherein:the reference electrode element either (i) is in contact with a housing of an electrochemical energy storage cell, at least in sections, or (ii) forms at least a portion of the housing of the electrochemical energy storage cell;the at least one of measurement and communication lines are arranged on the housing;the housing surrounds an electrode winding of the electrochemical energy storage cell, at least in sections; andthe electrode winding is disposed around a cell core of the electrochemical energy storage cell, and includes at least two electrodes and at least one separator positioned between the at least two electrodes; and determining, via the evaluation unit, an electrode potential of at least one of the at least two electrodes with reference to the reference electrode values.


An electric energy storage device includes two electrical terminals. The energy storage device further includes at least one first current path configured to electrically connect to the two terminals. The energy storage device further includes at least two energy storage modules configured to be connected to form a series connection of the energy storage modules. The energy storage modules include multiple storage units and a controllable multiple-voltage level converter. The converter is configured to optionally connect the one or more storage units in the first current path for the incremental adjustment of a module voltage, as at least one of a function of a control signal of a control and regulating device of the electric energy storage device.

Claims which contain your search:

1. An electric energy storage device comprising: two electrical terminals; at least one first current path configured to electrically connect the two terminals; at least two energy storage modules configured to be connected to form a series connection of the energy storage modules, the energy storage modules including:multiple storage units, anda controllable multiple-voltage level converter configured to optionally connect the one or more storage units in the first current path for incremental adjustment of a module voltage, as at least one of a function of a control signal of a control and regulating device of the electric energy storage device.

2. The energy storage device as claimed in claim 1, wherein a maximum voltage of the module is at least twice as high as voltage of the individual storage units of the at least one energy storage module that include a controllable multiple-voltage level converter.

3. The energy storage device as claimed in claim 1, wherein a maximum voltage of the module is 120 volts.

4. The energy storage device as claimed in claim 1, wherein the at least one controllable multiple-voltage level converter includes a circuit arrangement having controllable switches and diode elements.

5. The energy storage device as claimed in claim 1, further comprising: at least one second energy storage modules, the second energy storage modules including: multiple first storage units, and an associated switching device configured to optionally accommodate the at least one first storage unit in one section of the first current path or alternatively to short-circuit the section of the first current path.

6. The energy storage device as claimed in claim 1, wherein a parallel circuit of multiple first current paths are configured to connect the two terminals electrically.

7. The energy storage device as claimed in claim 1, further comprising: a capacitive component configured to act as an intermediate-circuit capacitor and arranged in a second current path between the terminals.

8. The energy storage device as claimed in claim 7, further comprising: a converter device connected to the two terminals in parallel with the second current path including the capacitive component.

9. A method for increasing the voltage at the terminals of an electric energy storage device, the method comprising: electrically connecting the two terminals of the energy storage device using at least one first current path of the energy storage device, the energy storage device including multiple energy storage modules connected to form a series connection of the modules and at least one of the energy storage modules having multiple storage units and a controllable multiple-voltage level converter, the multiple-voltage level converter being configured to optionally connect one or several of its storage units in the current path for incrementally increasing a module voltage as a function of a control signal; and controlling the multiple-voltage level converters in an increment at least on average smaller than the maximum module voltage of the at least one energy storage module including the multiple-voltage level converter.

11. The electric energy storage device as claimed in claim 1, wherein the electric energy storage device is a battery device.


The invention relates to an energy storage unit (1) comprising a plurality of energy storage sub-units (5) that have a first electrode (6) and a second electrode (7), the first electrode (6) and second electrode (7) of a particular energy storage sub-unit (5) being arranged on opposite sides of said energy storage sub-unit (5), and said energy storage unit comprising a receiving device (2) that has a plurality of adjacently-arranged receiving units each spatially delimited by a lateral wall, one energy storage sub-unit (5) being introduced into each receiving unit of said receiving device (2), and the energy storage sub-units (5) being secured in said receiving units such that the electrodes (6, 7) are arranged in a first contact level and in a second contact level, the electrodes (6, 7) arranged in the first contact level being electrically interconnected by means of a first printed circuit board (10) and the electrodes (6, 7) arranged in the second contact level (9) being electrically interconnected by means of a second printed circuit board (11). The invention also relates to an energy storage system which comprises a plurality of electrically-interconnected energy storage units (1) according to the invention.

Claims which contain your search:

1. An energy storage unit ( 1), comprising a plurality of energy storage subunits ( 5) each having a first electrode ( 6) and a second electrode ( 7), wherein the first electrode ( 6) and the second electrode ( 7) of a respective energy storage subunit ( 5) are arranged on opposite sides of the respective energy storage subunit ( 5), and the energy storage unit ( 1) also comprising a receiving device ( 2) having a plurality of receiving units ( 17) which are arranged next to one another and are each physically delimited by at least one side wall ( 18), wherein in each case one energy storage subunit ( 5) of the energy storage unit ( 1) is inserted into a receiving unit ( 17) of the receiving device ( 2), and the energy storage subunits ( 5) are fixed in the receiving units ( 17) in such a way that the electrodes ( 6, 7) of the energy storage subunits ( 5) are arranged in a first contact-making plane ( 8) and in a second contact-making plane ( 9), characterized in that the electrodes ( 6, 7) which are arranged in the first contact-making plane ( 8) are electrically interconnected by means of at least one first printed circuit board ( 10) and the electrodes ( 6, 7) which are arranged in the second contact-making plane ( 9) are electrically interconnected by means of at least one second printed circuit board ( 11).

2. The energy storage unit ( 1) as claimed in claim 1, characterized in that the energy storage subunits ( 5) are fixed in the receiving units ( 17) by at least one cover element ( 3).

3. The energy storage unit ( 1) as claimed in claim 2, characterized in that the at least one first printed circuit board ( 10) and/or the at least one second printed circuit board ( 11) at least partially form the at least one cover element ( 3).

4. The energy storage unit ( 1) as claimed in claim 1, characterized in that the receiving device ( 2) comprises at least one first insert ( 19) into which the at least one first printed circuit board ( 10) is inserted to make contact with the electrodes ( 6, 7) which are arranged in the first contact-making plane ( 8), and/or in that the receiving device ( 2) comprises at least one second insert into which the at least one second printed circuit board ( 11) is inserted to make contact with the electrodes ( 6, 7) which are arranged in the second contact-making plane ( 9).

5. The energy storage unit ( 1) as claimed in claim 4, characterized in that the at least one first printed circuit board ( 10) and/or the at least one second printed circuit board ( 11) has contact-making elements ( 12), which are configured to have an elastically restoring action, for making contact with the electrodes ( 6, 7), which are arranged in one contact-making plane ( 8, 9), of the energy storage subunits ( 5) in such a way that the contact-making elements ( 12) are pushed down when the respective printed circuit board ( 10, 11) is inserted into the insert ( 19), and the contact-making elements ( 12) make contact with the electrodes ( 6, 7) under mechanical stress when the printed circuit board ( 10) is inserted.

6. The energy storage unit ( 1) as claimed in claim 1, characterized in that the at least one first printed circuit board ( 10) and/or the at least one second printed circuit board ( 11) has contact lugs as contact-making elements ( 12), wherein the respective printed circuit board ( 10, 11) in each case has an opening next to a contact lug in such a way that the respective contact lug protrudes into the opening region and the contact lugs are connected to the electrodes ( 6, 7) by a welding process which is performed through the respective opening.

7. The energy storage unit ( 1) as claimed in claim 2, characterized in that the energy storage unit ( 1) comprises, as the at least one cover element ( 3), at least one first cover element in which the at least one first printed circuit board ( 10) is arranged and/or comprises at least one second cover element in which the at least one second printed circuit board ( 11) is arranged.

8. The energy storage unit ( 1) as claimed claim 1, characterized in that a group ( 32) of receiving units ( 17) of the receiving device ( 2) in each case has at least one connecting element ( 27) by which the group ( 32) of receiving units ( 17) is connected to at least one further group ( 32) of receiving units ( 17) and/or by which the group ( 32) of receiving units ( 17) is configured to be connected to at least one further group ( 32) of receiving units ( 17).

9. The energy storage unit ( 1) as claimed in claim 1, characterized in that the receiving device ( 2) or in each case one group ( 32) of receiving units ( 17) of the receiving device ( 2) is integrally produced by means of an injection-molding process.

10. The energy storage unit ( 1) as claimed in claim 1, characterized in that groups ( 32) of receiving units ( 17) are respectively spaced apart from one another, wherein an intermediate space ( 23) is formed between adjacent groups ( 32) of receiving units ( 17), and wherein the intermediate space ( 23) is configured to conduct a coolant ( 22) for controlling the temperature of the energy storage subunits ( 5).

11. The energy storage unit ( 1) as claimed in claim 1, characterized in that the at least one side wall ( 18) which in each case physically delimits a receiving unit ( 17) of the energy storage unit ( 1) is a temperature-control apparatus.

12. The energy storage unit ( 1) as claimed in claim 1, characterized in that the energy storage unit ( 1) comprises a battery management system, wherein the battery management system is at least partially integrated into the at least one first printed circuit board ( 10) and/or into the at least one second printed circuit board ( 11).

13. The energy storage unit ( 1) as claimed in claim 1, characterized in that the energy storage subunits ( 5) each comprise at least one electrochemical cell ( 25).

14. The energy storage unit ( 1) as claimed in claim 1, characterized in that the receiving units ( 17) each form a cylindrical volumetric space into which at least one energy storage subunit ( 5), which is a round cell, is inserted.

15. The energy storage unit ( 1) as claimed in claim 1, characterized in that the receiving units ( 17) each have, as a connecting element ( 27), a termination element, which, at opposite ends, projects beyond the at least one side wall ( 18), wherein the receiving units ( 17) are welded to the receiving device ( 2) by the termination elements.

16. The energy storage unit ( 1) as claimed in claim 1, characterized in that the receiving device ( 2) has at least one sealing wall ( 24) which closes off intermediate spaces ( 23), which are located between the receiving units ( 17), to the outside in a sealed manner, wherein the receiving device ( 2) has connections ( 21) for supplying and for discharging a coolant ( 22) to and from the intermediate spaces ( 23).

17. The energy storage unit ( 1) as claimed in claim 1, characterized in that the energy storage unit ( 1) has at least one connecting element ( 30, 30) for mechanical connection to at least one further energy storage unit ( 1) and/or at least one connecting element for electrically conductive connection to at least one further energy storage unit ( 1) and/or at least one connecting element for electrically conductive connection to an electrical load device.

18. An energy storage system comprising a plurality of energy storage units ( 1) which are electrically interconnected, characterized in that the energy storage units ( 1) are energy storage units as claimed in claim 1.

19. The energy storage system as claimed in claim 18, characterized in that the energy storage units ( 1) are mechanically and electrically connected to one another by connecting elements ( 30, 30).


The present invention relates to an energy storage unit (1) having a plurality of electrochemical cells (2), wherein the electrochemical cells (2) each have a first outer face (3) comprising a first electrode (5), and a second outer face (4) comprising a second electrode (6), and the electrochemical cells (2) are electrically interconnected owing to the lined-up arrangement (9) of the electrochemical cells (2) by way of the outer faces (3, 4) by means of the electrodes (5, 6). The energy storage unit (1) additionally comprises a first frame element (7) and a second frame element (8), which frame elements are directly or indirectly connected to one another, wherein the first frame element (7) is arranged at one end (10) of the lined-up arrangement (9) of the electrochemical cells (2), and the second frame element (8) is arranged at the other end (11) of the lined-up arrangement (9) of the electrochemical cells (2). The present invention also relates to a battery cell (2) for use with an energy storage unit (1) according to the invention, and also to a method for producing a battery cell (2) of this kind.

Claims which contain your search:

1. An energy storage unit ( 1) having a plurality of galvanic cells ( 2), wherein the galvanic cells ( 2) in each case have a first outer side ( 3) comprising a first electrode ( 5) and a second outer side ( 4) comprising a second electrode ( 6) and the galvanic cells ( 2) are electrically interconnected with one another by juxtaposition ( 9) of the galvanic cells ( 2) by way of the outer sides ( 3, 4) via the electrodes ( 5, 6), characterized in that the energy storage unit ( 1) comprises a first frame element ( 7) and a second frame element ( 8), which are directly or indirectly connected to one another, wherein the first frame element ( 7) is arranged at one end ( 10) of the juxtaposition ( 9) of the galvanic cells ( 2) and the second frame element ( 8) is arranged at the other end ( 11) of the juxtaposition ( 9) of the galvanic cells ( 2).

2. The energy storage unit ( 1) as claimed in claim 1, characterized in that at least one third frame element ( 12) which at least partly frames at least one galvanic cell ( 2) of the energy storage unit ( 1) is arranged between the first frame element ( 7) and the second frame element ( 8), wherein the first frame element ( 7) is connected to the second frame element ( 8) via the at least one third frame element ( 12).

3. The energy storage unit ( 1) as claimed in claim 2, characterized in that the at least one third frame element ( 12) is arranged in each case between identically sized groups of electrically interconnected galvanic cells ( 2) of the energy storage unit ( 1).

4. The energy storage unit ( 1) as claimed in claim 1, characterized in that the frame elements in each case have at least one fixing element, wherein adjacent frame elements are connected to one another in each case via the at least one fixing element.

5. The energy storage unit ( 1) as claimed in claim 2, characterized in that the first frame element ( 7) and/or the second frame element ( 8) and/or the at least one third frame element ( 12) in each case have/has at least one contacting element ( 20), wherein the at least one contacting element ( 20) contacts at least one galvanic cell ( 2) of the energy storage unit ( 1) for detecting at least one parameter of the galvanic cell ( 2).

6. The energy storage unit ( 1) as claimed in claim 5, characterized in that the first frame element ( 7) and/or the second frame element ( 8) and/or the at least one third frame element ( 12) in each case have/has at least one connection element ( 15) which is electrically conductively connected to the at least one contacting element ( 20), wherein the at least one connection element ( 15) is connected to a cell monitoring unit ( 19) and/or is connectable to a cell monitoring unit.

7. The energy storage unit ( 1) as claimed in claim 2, characterized in that the first frame element ( 7) and/or the second frame element ( 8) and/or the at least one third frame element ( 12) comprise(s) a cell monitoring unit ( 19).

8. The energy storage unit ( 1) as claimed in claim 2, characterized in that the first frame element ( 7) and/or the second frame element ( 8) and/or the at least one third frame element ( 12) are/is in each case a cooling device for regulating the temperature of at least one galvanic cell ( 2) of the energy storage unit ( 1).

9. The energy storage unit ( 1) as claimed in claim 2, characterized in that the first frame element ( 7) and/or the second frame element ( 8) and/or the at least one third frame element ( 12) in each case comprise(s) at least one bearing element ( 23) which projects into the area ( 22) spanned by the frame element ( 7, 8, 12) and on which at least one galvanic cell ( 2) of the energy storage unit ( 1) bears by way of a bearing region ( 24) of the galvanic cell ( 2).

10. The energy storage unit ( 1) as claimed in claim 1, characterized in that the energy storage unit ( 1) comprises at least one safety barrier ( 35) which is arranged between two adjacently arranged galvanic cells ( 2) of the energy storage unit ( 1), wherein the safety barrier ( 35) provides an electrically conductive connection ( 37) between said galvanic cells ( 2) and is configured to prevent a thermal chain reaction between said galvanic cells ( 2).

11. The energy storage unit ( 1) as claimed in claim 10, characterized in that the at least one safety barrier ( 35) is furthermore configured as a cooling device for regulating the temperature of the galvanic cells ( 2) surrounding the safety barrier ( 35).

12. The energy storage unit ( 1) as claimed in claim 10, characterized in that the at least one third frame element ( 12) is configured as the safety barrier ( 35).

14. A battery cell ( 2) for use with an energy storage unit ( 1) as claimed in claim 1, wherein the battery cell ( 2) has at least one electrode arrangement ( 27) having at least one cathode ( 32) and at least one anode ( 33), said at least one electrode arrangement being surrounded by a first half-shell ( 28) and by a second half-shell ( 29), wherein the first half-shell ( 28) and the second half-shell ( 29) are connected via a linking region ( 42) and the first half-shell ( 28) comprises the first electrode ( 5) of the battery cell ( 2) and the second half-shell ( 29) comprises the second electrode ( 6) of the battery cell ( 2).

15. The battery cell ( 2) as claimed in claim 14, characterized in that the first half-shell ( 28) comprises a first metallic foil ( 38) and the second half-shell ( 29) comprises a second metallic foil ( 39).

16. The battery cell ( 2) as claimed in claim 15, characterized in that the battery cell ( 2) is configured in the manner of a pouch cell, wherein the first metallic foil ( 38) is shaped to form the first half-shell ( 28) by means of a deep-drawing method, and the second metallic foil ( 39) is shaped to form the second half-shell ( 29) by means of a deep-drawing method.

17. The battery cell ( 2) as claimed in claim 15, characterized in that the cathode ( 32) of the at least one electrode arrangement ( 27) is electrically conductively connected to the first half-shell ( 28) and the anode ( 33) of the at least one electrode arrangement ( 27) is electrically conductively connected to the second half-shell ( 29), wherein at least one insulator element ( 30) is arranged between the first half-shell ( 28) and the second half-shell ( 29) in the linking region ( 42) in such a way that the first half-shell ( 28) is electrically insulated from the second half-shell ( 29).

18. The battery cell ( 2) as claimed in claim 15, characterized in that the electrode arrangement ( 27) is surrounded by an electrically nonconductive inner layer ( 43), to which the first half-shell ( 28) and the second half-shell ( 29) are adjacent toward the outside.

19. The battery cell ( 2) as claimed in claim 18, characterized in that the cathode ( 32) of the at least one electrode arrangement ( 27) is electrically conductively connected to the first half-shell ( 28) via a first connecting element ( 31) and the anode ( 33) of the at least one electrode arrangement ( 27) is electrically conductively connected to the second half-shell ( 29) via a second connecting element ( 31), wherein the first connecting element ( 31) and the second connecting element ( 31) are led out from the inner layer ( 43) and the half-shells ( 28, 29) of the battery cell ( 2) and the first connecting element ( 31) electrically conductively contacts the first half-shell ( 28) on the outer side ( 3) thereof and the second connecting element ( 31) electrically conductively contacts the second half-shell ( 29) on the outer side ( 4) thereof.

20. The battery cell ( 2) as claimed in claim 14, characterized in that the battery cell ( 2) comprises at least one first electrode arrangement ( 27) having a cathode ( 32) and an anode ( 33) and at least one second electrode arrangement ( 27) having a cathode ( 32) and an anode ( 33), wherein the cathode ( 32) of the first electrode arrangement ( 27) electrically conductively contacts the first half-shell ( 28) of the battery cell ( 2), the anode ( 33) of the second electrode arrangement ( 27) electrically conductively contacts the second half-shell ( 29) of the battery cell ( 2) and the battery cell ( 2) comprises in each case between the first electrode arrangement ( 27) and the second electrode arrangement ( 27) an electrically conductive separating element ( 41) which spatially separates the first electrode arrangement ( 27) from the second electrode arrangement ( 27) and which is electrically conductively contacted by the anode ( 33) of the first electrode arrangement ( 27) and the cathode ( 32) of the second electrode arrangement ( 27).

21. The battery cell ( 2) as claimed in claim 14, characterized in that at least one cooling device for regulating the temperature of the battery cell ( 2) is arranged between the first half-shell ( 28) and the second half-shell ( 29) in the linking region ( 42).

22. The battery cell ( 2) as claimed in claim 14, characterized in that the first half-shell ( 28) and the second half-shell ( 29) have in the linking region ( 42) in each case a border ( 25) tapering off in a flat fashion, wherein the border ( 25) of the first half-shell ( 28) together with the border ( 25) of the second half-shell ( 29) are electrically non-conductively connected to one another.

23. The battery cell ( 2) as claimed in claim 14, characterized in that the first half-shell ( 28) and the second half-shell ( 29) are connected to one another by at least one of a flanged adhesive connection and an adhesive plug connection.

24. The battery cell ( 2) as claimed in claim 14, characterized in that the cathode ( 32) is contacted with a first terminal element ( 45), wherein the first terminal element ( 45) penetrates through the first half-shell ( 28) on the outer side ( 3) thereof, and wherein the first terminal element ( 45) is electrically insulated from the first half- shell ( 28), and/or the anode ( 33) is contacted with a second terminal element ( 46), wherein the second terminal element ( 46) penetrates through the second half-shell ( 29) on the outer side ( 4) thereof, and wherein the second terminal element ( 46) is electrically insulated from the second half-shell ( 29).

25. A method for producing a battery cell ( 2) as claimed in claim 14, wherein a first half-shell (28) having a first outer side (3) is shaped from a first metallic foil (38), a second half-shell (29) having a second outer side (4) and configured in a manner corresponding to the first half-shell (28) is shaped from a second metallic foil (29) in such a way that at least one electrode arrangement (27) having a cathode (32) and an anode (33) can be enclosed by the first half-shell (28) and the second half-shell (29), the cathode (32) and the anode (33) of an electrode arrangement are electrically conductively contacted in such a way that a contacting of the cathode (32) via the first outer side (3) of the first half-shell (28) is made possible and a contacting of the anode (33) via the second outer side (4) of the second half-shell (29) is made possible, and the first half-shell (28) and the second half-shell (29) are electrically non-conductively connected to one another.


The invention relates to a method for charging energy storage cells of an energy storage device with a plurality of energy storage modules which are connected in series in an energy supply line, each energy storage module comprising an energy storage cell module which has at least one energy storage cell and comprising a coupling device with coupling elements. The coupling elements are designed to selectively connect the energy storage cell module in the energy supply line or to bridge the energy storage cell module. The method consists of the following steps: coupling the output connections of the energy storage device to a DC voltage source, controlling the coupling devices of all the energy storage modules in order to bridge the energy storage cell modules in the energy supply line for a first specified period of time, and controlling the coupling devices of at least one first energy storage module in order to connect the energy storage cell module of the first energy storage module in the energy supply line for a second specified period of time after the first specified period of time has elapsed.

Claims which contain your search:

1. A method ( 10) for charging energy storage cells ( 5 a, 5 k) of an energy storage device ( 1) comprising a multiplicity of energy storage modules ( 3) connected in series in an energy supply string, which energy storage modules each comprise: an energy storage cell module (5), which has at least one energy storage cell (5a, 5k), and a coupling device (7) comprising coupling elements (7a, 7b; 7c, 7d), which are configured to selectively switch the energy storage cell module (5) into the energy supply string or to bypass said energy storage cell module, wherein the method (10) has the following steps: coupling (11) output connections (1a, 1b) of the energy storage device (1) to a DC voltage source (2c); actuating (12) the coupling devices (7) of all energy storage modules (3) for bypassing the energy storage cell modules (5) in the energy supply string for a first predetermined time span; and actuating (13) the coupling devices (7) of at least one first energy storage module (3) for switching the energy storage cell module (5) of the at least one first energy storage module (3) into the energy supply string for a second predetermined time span once the first predetermined time span has elapsed.

2. The method ( 10) as claimed in claim 1, wherein the coupling step ( 11) comprises coupling of one of the output connections ( 1 a, 1 b) of the energy storage device ( 1) to the DC voltage source ( 2 c) via a coupling inductance ( 2 a), and wherein the duration of the second predetermined time span is dependent on an absolute value of a current through the coupling inductance ( 2 a).

3. The method ( 10) as claimed in claim 1, wherein the duration of the second predetermined time span is dependent on an absolute value of the current flow through the energy storage cell module ( 5) of the first energy storage module ( 3).

4. The method ( 10) as claimed in claim 1, wherein the steps of bypassing the energy storage cell modules ( 5) and switching at least one energy storage cell module ( 5) into the energy supply string are iterated.

5. The method ( 10) as claimed in claim 4, further comprising actuation ( 13) of the coupling devices ( 7) of at least one second energy storage module ( 3) for switching the energy storage cell module ( 5) of the at least one second energy storage module ( 3) into the energy supply string.

6. A system ( 100), comprising: an energy storage device (1) comprising a multiplicity of energy storage modules (3) connected in series in an energy supply string, which energy storage modules each comprise: an energy storage cell module (5), which has at least one energy storage cell (5a, 5k), and a coupling device (7) comprising coupling elements (7a, 7b; 7c, 7d), which are configured to selectively switch the energy storage cell module (5) into the energy supply string or to bypass said energy storage cell module; a DC link (2b), which is coupled to output connections (1a, 1b) of the energy storage device (1); a pulse-controlled inverter (4), which is coupled to the DC link (2b) and which is fed an input voltage from the DC link (2b); an electric machine (6), which is coupled to the pulse-controlled inverter (4) and which is supplied a phase voltage by the pulse-controlled inverter (4); a DC voltage source (2c), which is connected switchably to the output connections (1a, 1b) of the energy storage device (1); and a control device (8), which is coupled to the coupling devices (7) and which is configured to selectively actuate the coupling devices (7) of the energy storage device (1) for providing a total output voltage of the energy storage device (1) and to implement a method (10) as claimed in claim 1.

9. The system ( 100) as claimed in claim 6, wherein the energy storage cells ( 5 a, 5 k) comprise lithium-ion rechargeable batteries.

10. The system ( 100) as claimed in claim 6, further comprising: a coupling inductance (2a), which is coupled between one of the output connections (1a) of the energy storage device (1) and the DC voltage source (2c).

13. The system ( 100) as claimed in claim 6, wherein the DC voltage source ( 2 c) is a low-voltage battery.


Patent
Robert Bosch GmbH | Date: 2016-04-14

A system includes a rechargeable electrical energy store having a predetermined nominal capacity and a predetermined maximum capacity, the maximum capacity being higher than the nominal capacity, and a charging unit for controlling a charging process of the energy store. The charging unit is configured for the purpose of charging the energy store until the amount of energy stored in it equals the nominal capacity, and then to determine an end of charging.

Claims which contain your search:

1. A system, comprising: a rechargeable electrical energy store having a predetermined nominal capacity and a predetermined maximum capacity, the maximum capacity being higher than the nominal capacity; a charging unit to control a charging process of the energy store, the charging unit being configured to charge the energy store until an amount of energy stored in the energy store corresponds to the nominal capacity, and then to determine an end of charging.

2. The system as recited in claim 1, wherein the charging unit is configured to end the charging of the energy store when the end of charging is reached.

3. The system as recited in claim 1, wherein the charging unit is configured to charge the energy store with a constant current until a voltage of the energy store reaches a predetermined threshold value.

4. The system as recited in claim 2, wherein the voltage applied to the energy store is usable as a measure for the amount of energy stored in the energy store.

5. The system as recited in one of claim 3, wherein the charging unit is configured to subsequently continue to charge the energy store to a predetermined voltage until a current flowing through the energy store has dropped to a predetermined value.

7. The system as recited in claim 5, wherein the current flowing through the energy store is usable as a measure for the amount of energy stored in the energy store.

9. The system as recited in claim 1, wherein the charging unit is integrated into the electrical energy store as a separately manageable unit.


A charging circuit for an energy storage device having an inductive transmitter element designed to inductively receive a charging AC voltage. In one embodiment, a rectifier is coupled to the inductive transmitter element and designed to convert the received charging AC voltage into a charging DC voltage. The energy storage device has at least one energy supply section coupled between two output connections of the energy storage device. The energy supply section has one or more energy storage modules connected in series in the power supply section. The energy storage modules each have an energy storage cell module having at least one energy storage cell, and a coupling device having a large number of coupling elements.

Claims which contain your search:

1. A charging circuit for an energy storage device, the charging circuit comprising: an inductive transmitter element which is designed to inductively receive a charging AC voltage; a rectifier which is coupled to the inductive transmitter element and which is designed to convert the received charging AC voltage into a charging DC voltage; and an energy storage device having at least one energy supply section which is coupled between two output connections of the energy storage device, wherein the energy supply section has:one or more energy storage modules which are connected in series in the energy supply section and which each have: wherein the rectifier is coupled directly to the output connections of the energy storage device, and wherein the energy storage device has a control device which is designed to actuate the coupling devices of the energy storage modules as a function of the state of charge of the associated energy storage cells using the rectifier in a charging mode of the energy storage device.

4. The charging circuit according to claim 1, wherein the at least one energy storage cell has a lithium-ion rechargeable battery.

5. The charging circuit ( 100) according to claim 1, further comprising: a DC voltage intermediate circuit which is coupled between the output connections of the energy storage device.

6. A method for charging an energy storage device, the method comprising: inductively receiving a charging AC voltage by way of an inductive transmitter element; converting the received charging AC voltage into a charging DC voltage by way of a rectifier; determining the state of charge of energy storage cells of an energy storage device having at least one energy supply section which is coupled between two output connections of the energy storage device, wherein the energy supply section has:one or more energy storage modules which are connected in series in the energy supply section and which each have: setting an output voltage of the energy supply section by actuating the coupling devices of the energy storage modules depending on the determined state of charge of the energy storage cells.

7. The method according to claim 6, wherein actuating the coupling devices of the energy storage modules comprises selectively connecting or disconnecting the energy storage cell modules into/from the respective energy supply section, and wherein the method further exhibits the step of: cyclically exchanging the energy storage cell modules which are connected into the respective energy supply section.

8. The method according to claim 7, wherein the number of energy storage cell modules which are connected into the respective energy supply section is determined depending on the determined state of charge of the energy storage cells.

Loading Robert Bosch GmbH collaborators
Loading Robert Bosch GmbH collaborators