DE102022106987A1 - Battery with multi-sided cooling, drive system and motor vehicle - Google Patents

Abstract

The present invention relates to a battery (1) for an electric drive system (2) for a motor vehicle (3), comprising a plurality of battery cells (4), each with a first arrester (5) and a second arrester (6), a first busbar (7 ), a second busbar (8) and a battery housing (9), the first busbar (7) and the second busbar (8) being partially covered by an electrically insulating layer (10), and the first arresters (5). the first busbar (7) and the second arresters (6) are electrically coupled to the second busbar (8). The first busbar (7) is arranged on a first side (11) of the battery cells (4) and the second busbar (8) is arranged on a second side (12) of the battery cells (4) that is different from the first side (11). The invention further relates to a drive system (2) and a motor vehicle (3).

Description

The present invention relates to a battery for an electric drive system for a motor vehicle. The invention further relates to an electric drive system for a motor vehicle and a motor vehicle with a generic electric drive system.

It is known that motor vehicles have batteries for storing electrical energy for operating an electric motor for driving the motor vehicle. Such batteries are sometimes also referred to as “traction batteries” and have a battery housing, which forms a battery interior in which a large number of battery cells are arranged.

Such batteries are used in particular in fully electric motor vehicles, which are also referred to as “Battery Electric Vehicle” or “BEV” for short, or in hybrid vehicles, which are also referred to as “Hybrid Electric Vehicle” or “HEV” for short. Hybrid vehicles, which, like fully electric vehicles, have a charging interface for charging the battery via an external charging device, are also known as “plug-in hybrid electric vehicles” or “PHEV” for short.

Generic batteries have several battery cells, each with a first arrester and a second arrester. The first arresters are, for example, electrically coupled to a first busbar and the second arresters are electrically coupled to one another via a second busbar. The busbars are each electrically coupled to an electrode and electrically insulated from each other and from the battery housing.

From the document US 2014 / 0023906 A1 A battery is known in which the battery cells are electrically separated from one another by insulating partitions. Two battery cells are electrically connected to each other via a busbar, so that the battery has a large number of such busbars for connecting all battery cells. According to one embodiment, the busbars are cast into a cover of the battery. The document US 2020 / 0350548 A1 shows a battery with a base plate in which troughs are formed for inserting positive and negative electrodes of the battery cells. At the document US 2020 / 0185682 A1 The battery cells are connected via printed circuit boards which are arranged on a side wall of the battery housing.

Known batteries have the disadvantage that heat dissipation from the conductors of the battery cells is only inadequately guaranteed. This can lead to a build-up of heat and thus accelerated aging and reduced performance of the battery.

It is therefore an object of the present invention to eliminate or at least partially eliminate the disadvantages described above in a battery for a drive system of a motor vehicle. In particular, it is the object of the present invention to create a battery that provides improved heat dissipation from the battery cells in a simple and cost-effective manner and at least reduces the risk of heat build-up compared to known batteries.

The above task is solved by the patent claims. Accordingly, the task is achieved by a battery for an electric drive system for a motor vehicle with the features of independent claim 1, by an electric drive system for a motor vehicle with the features of the independent claim 9 and by a motor vehicle with an electric drive system with the features of the independent claim 10 solved. Further features and details of the invention emerge from the subclaims, the description and the drawings. Features and details that are described in connection with the battery according to the invention naturally also apply in connection with the electric drive system according to the invention and the motor vehicle according to the invention and vice versa, so that reference is or can always be made to each other with regard to the disclosure of the individual aspects of the invention.

According to a first aspect of the invention, the object is achieved by a battery for an electric drive system for a motor vehicle. The battery has a plurality of battery cells, each with a first conductor and a second conductor, a first busbar, a second busbar and a battery housing, the first busbar and the second busbar being partially covered by an electrically insulating layer. The first arresters are electrically coupled to the first busbar. The second arresters are electrically coupled to the second busbar. According to the invention, the first busbar is arranged on a first side of the battery cells and the second busbar is arranged on a second side of the battery cells that is different from the first side.

The battery cells each have the first arrester and the second arrester. The first arrester is designed, for example, as a positive pole and the second arrester as a negative pole of the respective battery cell. Preferably the first arrester and the second arrester are on different sides arranged in the respective battery cell and/or aligned in different directions by the battery cells. The battery cells are designed, for example, as solid battery cells, pouch cells or the like. The battery cells are preferably combined to form a battery cell stack, which is also referred to as a “stack”. In the stack, the battery cells are preferably braced against one another in the stacking direction, for example by means of a pressure device acting against the stack, in particular in interaction with the battery housing or the first busbar and/or the second busbar.

The battery has the first busbar and the second busbar, each of which is partially covered by the electrically insulating layer. Preferably, a predominant part of the first busbar is covered with the insulating layer. More preferably, a predominant part of the second busbar is covered with the insulating layer. The insulating layer is preferably molded, cast, glued or the like.

According to the invention, it can be provided that the second busbar is designed symmetrically to the first busbar. The first arresters are arranged at non-insulated locations on the first busbar in such a way that the first arresters are electrically coupled to the first busbar. The first arresters are preferably welded to the first busbar. The second arresters are arranged at non-insulated locations on the second busbar in such a way that the second arresters are electrically coupled to the second busbar. The second arresters are preferably welded to the second busbar.

The first busbar is arranged on the first side of the battery cells and the second busbar is arranged on the second side of the battery cells. The second page is different from the first page. Preferably, the first busbar, preferably an electrically insulated area of the first busbar, contacts a cell wall of the first side of the battery cells, preferably flatly. According to the invention, it can be provided that the first busbar contacts the cell walls of one or more sides of the battery cells adjacent to the first side. Preferably, the second busbar, preferably an electrically insulated area of the second busbar, contacts a cell wall of the second side of the battery cells, preferably flatly. According to the invention, it can be provided that the second busbar contacts the cell walls of one or more sides of the battery cells adjacent to the second side. Accordingly, it can be provided according to the invention that the first busbar and the second busbar contact at least one cell wall of the same side of battery cells in areas different from one another. A large cover of the battery cells by the first busbar and the second busbar improves heat dissipation via the two busbars. Alternatively or additionally, a heat-conducting means, in particular an electrically insulating heat-conducting means, can be arranged between the first busbar and the battery cells and/or the second busbar and the battery cells in order to improve heat transfer from the battery cells to the respective busbar.

The first busbar and the second busbar are preferably integrated into a frame in which the battery cells are inserted. The frame is preferably designed to be closed and thus surrounds the battery cells or the stack on at least four sides. The frame is preferably rectangular with two long sides and two short sides. It is preferred that the frame is formed from the electrically insulating layer or forms the electrically insulating layer. Accordingly, it can be provided according to the invention that the first busbar and/or the second busbar are cast, pressed, glued or the like into the frame.

The frame preferably has guide devices for improved insertion and/or holding of the battery cells in the frame. The frame preferably has connecting webs between two opposite sides of the frame to improve the stability of the frame and/or to separate the battery cells in the frame and/or to improve heat dissipation from the stack. The connecting webs preferably have a particularly high thermal conductivity and are electrically insulated. The connecting webs preferably extend between the longest sides of the frame and parallel to the shortest sides of the frame.

The battery cells, the first busbar and the second busbar are arranged in the battery housing. The battery housing preferably has one or more openings for introducing a gap filler for filling cavities within the battery housing, for example between the first busbar and the battery housing or the second busbar and the battery housing. The gap filler has a material which is flowable for filling into the openings and which preferably solidifies afterwards. Furthermore, it is preferred that the gap filler has particularly good thermal conductivity in order to improve heat transfer from the busbar to the battery housing.

A battery according to the invention has the advantage over conventional batteries that heat dissipation from the battery cells via the busbars is improved using simple means and in a cost-effective manner. By arranging the busbars on different sides of the battery cells, the battery cells can be cooled from several sides via the busbars. In addition, the arrangement of the busbars according to the invention improves protection of the battery cells from external mechanical influences.

According to a preferred further development of the invention, it can be provided in a battery that the second side is opposite to the first side. Accordingly, the battery cells are arranged sandwich-like between the first busbar and the second busbar, so that the heat of a stack can be dissipated in two opposite directions. This has the advantage that heat dissipation from the battery cells via the busbars is improved using simple means and in a cost-effective manner.

According to the invention, it is preferred that the first busbar completely or predominantly covers the first side of the battery cells, and/or that the second busbar completely or predominantly covers the second side of the battery cells. The first busbar is therefore preferably designed to cover the first side of the battery cells completely or at least predominantly, for example to over 80% or over 90%. The second busbar is therefore preferably designed to cover the second side of the battery cells completely or at least predominantly, for example to over 80% or over 90%. This has the advantage that heat dissipation from the battery cells via the busbars is improved using simple means and in a cost-effective manner.

More preferably, the first busbar extends over a third side adjacent to the first side of the battery cells. Accordingly, the first busbar is preferably L-shaped. Alternatively or additionally, the second busbar extends over a fourth side adjacent to the second side of the battery cells. Accordingly, the second busbar is preferably L-shaped. By extending the busbars over several sides of the battery cells, one contact surface for heat dissipation can be enlarged. This has the advantage that heat dissipation from the battery cells via the busbars and protection of the battery cells from mechanical influences are improved using simple means and in a cost-effective manner.

In a particularly preferred embodiment of the invention, the third side is arranged opposite the fourth side. It is preferred here that the first busbar has a first bending region in which the first busbar is bent, for example by 90°. Alternatively, the first busbar can also be composed of several parts that are arranged obliquely to one another, for example to form an angle of 90°, and are connected to one another, for example by a welding area. Furthermore, it is preferred that the second busbar has a second bending region in which the second busbar is bent, for example by 90°. Alternatively, the second busbar can also be composed of several parts that are arranged obliquely to one another, for example to form an angle of 90°, and are connected to one another, for example by a welding area. The first busbar and the second busbar preferably form a common, preferably closed, frame which surrounds the battery cells on four sides, the first busbar being electrically insulated from the second busbar, for example by a common electrically insulating, solidified casting compound. The frame is preferably rectangular with two long sides and two short sides. It is preferred that the first busbar and/or the second busbar are cast, pressed, glued or the like into the frame. The frame preferably has connecting webs between two opposite sides of the frame to improve the stability of the frame and/or to separate the battery cells in the frame and/or to improve heat dissipation from the stack. The connecting webs are preferably made of a metal or have at least one metal and preferably have an electrically insulating layer. The connecting webs are preferably cast, injected or similar into the frame. Preferably, the connecting webs are each mechanically coupled to either the first busbar or the second busbar, for example welded, glued or the like. The connecting webs preferably have a particularly high thermal conductivity. The connecting webs preferably extend between the longest sides of the frame and parallel to the shortest sides of the frame. According to the invention, it can be provided that the frame additionally or alternatively has a central partition which extends within the frame over a largest base area of the frame. The partition is preferably connected to the connecting webs for improved heat dissipation. Preferably, the partition is formed from a metal or has at least one metal and preferably has have an electrically insulating layer. Preferably, the partition is cast, injected or the like into the frame. Preferably, the partition is mechanically coupled to either the first busbar or the second busbar, for example welded, glued or the like. The connecting webs preferably have a particularly high thermal conductivity. An electrical separation of the first busbar from the second busbar is always provided. This has the advantage that heat dissipation from the battery cells via the busbars and protection of the battery cells from mechanical influences are improved using simple means and in a cost-effective manner. Furthermore, the assembly of the battery can be improved in this way, for example by allowing the battery cells to be pre-assembled with the frame of the first busbar and the second busbar.

Preferably, the first busbar predominantly or completely covers the third side. Alternatively or additionally, it is preferred that the second busbar predominantly or completely covers the fourth side. The first busbar is therefore preferably designed to cover the third side of the battery cells completely or at least predominantly, for example to over 60% or over 90%. The second busbar is therefore preferably designed to cover the fourth side of the battery cells completely or at least predominantly, for example to over 60% or over 90%. It is particularly preferred that the first busbar predominantly or completely covers the first side and the third side. In addition, it is preferred that the second busbar predominantly or completely covers the second side and the fourth side. This has the advantage that heat dissipation from the battery cells via the busbars and protection of the battery cells from mechanical influences are improved using simple means and in a cost-effective manner.

According to a preferred embodiment of the invention, the battery housing surrounds the battery cells on four sides, with a first opening of the battery housing being closed by a first cover and a second opening of the battery housing being closed by a second cover. The battery housing is preferably designed in one piece, with the first cover and the second cover not being part of the battery housing, but merely closing off the battery housing from the outside. Preferably, the third side of the battery cells faces the first opening and the fourth side of the battery cells faces the second opening. The first cover is preferably held on the first busbar. The first cover is preferably formed integrally with the electrically insulating layer of the first busbar. Preferably, the first cover has such dimensions that the first cover completely closes the first opening. Preferably, the first cover is designed such that the first cover contacts the housing wall in the assembled state, so that further insertion of the frame into the battery housing is positively limited by the first cover. The second cover is preferably held on the second busbar. The second cover is preferably formed integrally with the electrically insulating layer of the second busbar. The second lid preferably has dimensions such that the second lid completely or at least almost completely closes the second opening. The second cover is preferably designed in such a way that the second cover can be inserted into the battery housing via the first housing opening when assembling the frame with the battery cells. Preferably, the first cover and second cover are welded, glued, screwed, riveted or the like to the battery housing. Electrodes of the busbars are preferably led out through the covers. It is preferred here that the first electrode, which is electrically coupled to the first busbar, is guided outwards through the first cover and/or the second electrode, which is electrically coupled to the second busbar, is guided outwards through the second cover. This has the advantage that heat dissipation from the battery cells via the busbars and protection of the battery cells from mechanical influences are improved using simple means and in a cost-effective manner. Furthermore, the assembly of the battery can be improved in this way, for example by slightly linearly inserting the frame with the battery cells into the battery housing.

According to an alternative embodiment of the invention, the battery housing surrounds the battery cells on five sides, with a first opening of the battery housing being closed by a first cover. The battery housing is preferably designed in one piece, with the first cover not being part of the battery housing, but merely closing off the battery housing from the outside. Preferably, the third side of the battery cells faces the first opening. The first cover is preferably held on the first busbar. The first cover is preferably formed integrally with the electrically insulating layer of the first busbar. Preferably, the first cover has such dimensions that the first cover completely closes the first opening. Preferably, the first cover is designed such that the first cover contacts the housing wall in the assembled state, so that further insertion of the frame into the battery housing is positively limited by the first cover. Preferential The first cover is welded, glued, screwed, riveted or the like to the battery housing. The first electrode of the first busbar is preferably led out through the first cover. The second electrode of the second busbar preferably extends outwards through a passage in the battery housing and is preferably electrically insulated from the battery housing, for example by an insulating potting compound or the like. This has the advantage that heat dissipation from the battery cells via the busbars and protection of the battery cells from mechanical influences are improved using simple means and in a cost-effective manner. Furthermore, the assembly of the battery can be improved in this way, for example by slightly linearly inserting the frame with the battery cells into the battery housing.

According to a second aspect of the invention, the object is achieved by an electric drive system for a motor vehicle. The electric drive system has an electric motor for driving the motor vehicle. According to the invention, the electric drive system has a battery according to the invention. The drive system according to the invention has all the advantages that have already been described for a battery according to the first aspect of the invention. Accordingly, the drive system according to the invention has the advantage over conventional drive systems that heat dissipation from the battery cells via the busbars is improved. By arranging the busbars on different sides of the battery cells, the battery cells can be cooled from several sides via the busbars. In addition, the arrangement of the busbars according to the invention improves protection of the battery cells from external mechanical influences.

According to a third aspect of the invention, the object is achieved by a motor vehicle with an electric drive system according to the invention. The motor vehicle according to the invention has all the advantages that have already been described for a battery according to the first aspect of the invention and for a drive system according to the second aspect of the invention. Accordingly, the motor vehicle according to the invention has the advantage over conventional motor vehicles that heat dissipation from the battery cells via the busbars is improved. By arranging the busbars on different sides of the battery cells, the battery cells can be cooled from several sides via the busbars. In addition, the arrangement of the busbars according to the invention improves protection of the battery cells from external mechanical influences.

• 1 in einer perspektivischen Ansicht einen ersten Herstellungszustand einer Batterie gemäß einer bevorzugten Ausführungsform der Erfindung,
• 2 in einer perspektivischen Ansicht einen zweiten Herstellungszustand der Batterie gemäß der bevorzugten Ausführungsform der Erfindung,
• 3 in einer perspektivischen Ansicht einen dritten Herstellungszustand der Batterie gemäß der bevorzugten Ausführungsform der Erfindung,
• 4 in einer perspektivischen Ansicht einen optionalen vierten Herstellungszustand der Batterie gemäß der bevorzugten Ausführungsform der Erfindung,
• 5 in einer perspektivischen Ansicht einen optionalen fünften Herstellungszustand der Batterie gemäß der bevorzugten Ausführungsform der Erfindung,
• 6 in einer perspektivischen Ansicht einen sechsten Herstellungszustand der Batterie gemäß der bevorzugten Ausführungsform der Erfindung,
• 7 in einer perspektivischen explodierten Ansicht eine zweite Elektrode gemäß der bevorzugten Ausführungsform der Erfindung,
• 8 in einer perspektivischen Ansicht einen siebten Herstellungszustand der Batterie gemäß der bevorzugten Ausführungsform der Erfindung,
• 9 in einer perspektivischen Ansicht einen optionalen achten Herstellungszustand der Batterie gemäß der bevorzugten Ausführungsform der Erfindung,
• 10 in einer perspektivischen Ansicht die Batterie gemäß der bevorzugten Ausführungsform der Erfindung, und
• 11 in einer Seitenansicht eine bevorzugte Ausführungsform eines erfindungsgemäßen Kraftfahrzeugs.

A battery according to the invention, a drive system according to the invention and a motor vehicle according to the invention are explained in more detail below with reference to drawings. They show schematically:

• 1 in a perspective view a first manufacturing state of a battery according to a preferred embodiment of the invention,
• 2 in a perspective view a second manufacturing state of the battery according to the preferred embodiment of the invention,
• 3 in a perspective view a third manufacturing state of the battery according to the preferred embodiment of the invention,
• 4 in a perspective view an optional fourth manufacturing state of the battery according to the preferred embodiment of the invention,
• 5 in a perspective view an optional fifth manufacturing state of the battery according to the preferred embodiment of the invention,
• 6 in a perspective view a sixth manufacturing state of the battery according to the preferred embodiment of the invention,
• 7 in a perspective exploded view a second electrode according to the preferred embodiment of the invention,
• 8th in a perspective view a seventh manufacturing state of the battery according to the preferred embodiment of the invention,
• 9 in a perspective view an optional eighth manufacturing state of the battery according to the preferred embodiment of the invention,
• 10 in a perspective view the battery according to the preferred embodiment of the invention, and
• 11 in a side view a preferred embodiment of a motor vehicle according to the invention.

Elements with the same function and mode of operation are in the 1 until 11 each provided with the same reference numerals.

In 1 is the first manufacturing state of a battery 1 (cf. 10 ) according to a preferred embodiment of the invention schematically in shown in a perspective view. A first busbar 7 with a first bending region 20 and a first electrode 22 and a second busbar 8 with a second bending region 21 and a second electrode 23 are provided. A first cover 16 is arranged on a shorter side of the first busbar 7, on which the first electrode 22 is formed. The first electrode 22 is passed through the first cover 16.

2 shows the second manufacturing state of the battery 1 according to the preferred embodiment of the invention schematically in a perspective view. In this manufacturing state, a second cover 18 is arranged on the second electrode 23. The second electrode 23 is passed through the second cover 18.

In 3 the third manufacturing state of the battery 1 according to the preferred embodiment of the invention is shown schematically in a perspective view. In this manufacturing state, areas of the first busbar 7 and the second busbar 8 are covered with an electrically insulating layer 10. A frame 29 is formed by the first busbar 7, second busbar 8 and electrically insulating layer 10.

4 shows the optional fourth manufacturing state of the battery 1 according to the preferred embodiment of the invention schematically in a perspective view. In this manufacturing state, connecting webs 24 made of the electrically insulating layer are arranged between the longer sides of the frame 29. The connecting webs 24 provide several separate areas for arranging battery cells 4 (cf. 6 ) educated.

In 5 the optional fifth manufacturing state of the battery 1 according to the preferred embodiment of the invention is shown schematically in a perspective view. In this manufacturing state, the frame 29 is further subdivided by a partition 25 made of the electrically insulating layer and extending longitudinally to the frame 29.

6 shows the sixth manufacturing state of the battery 1 according to the preferred embodiment of the invention schematically in a perspective view. In this manufacturing state, a battery cell 4 with several first arresters 5 and several second arresters 6 is inserted into the frame 29. The first arresters 5 are electrically coupled to the first busbar 7, for example by welding. The second arresters 6 are electrically coupled to the second busbar 8, for example by welding. According to the invention, several battery cells 4, for example each with only a first arrester 5 and a second arrester 6, can also be arranged on the frame 29.

In 7 1, the second electrode 23 according to the preferred embodiment of the invention is shown schematically in an exploded perspective view. In this view it can be seen that the second electrode 23 is passed through the second cover 18.

8th shows a seventh manufacturing state of the battery 1 according to the preferred embodiment of the invention schematically in a perspective view. In this manufacturing state, the frame 29 is arranged next to a battery housing 9. The second cover 18 faces a first opening 15 of the battery housing 9. The frame 29 surrounds a first side 11, a second side 12, a third side 13 and a fourth side 14 of the battery cells 4. In this manufacturing state, the frame 29 can be inserted into the battery housing 9 in such a way that the second cover 18 has a second opening 17 of the battery housing 9 and the first cover 16 closes the first opening 15.

In 9 the optional eighth manufacturing state of the battery 1 according to the preferred embodiment of the invention is shown schematically in a perspective view. In this manufacturing state, a gap filler 26 is arranged on the frame 29. To make the gap filler 26 easier to see, the battery housing 9 is hidden.

10 shows the battery 1 according to the preferred embodiment of the invention schematically in a perspective view. The frame 29 is arranged in the battery housing 9 in such a way that the second cover 18 closes the second opening 17 of the battery housing 9 and the first cover 16 closes the first opening 15 of the battery housing 9. The battery housing 9 has a plurality of filling openings 27 for filling the gap filler 26, which are arranged adjacent to the first side 11 in this illustration, for example. It can be provided that additionally or alternatively such filling openings 27 are arranged adjacent to the second side 12.

In 11 the preferred embodiment of a motor vehicle 3 according to the invention is shown schematically in a side view. The motor vehicle 3 has an electric drive system 2 according to the invention with an electric motor 19 with a transmission 28 for driving the motor vehicle 3 and a battery 1 according to the invention for providing electrical energy for operating the electric motor 19.

Reference symbol list

1

battery

2

Drive system

3

motor vehicle

4

Battery cell

5

first arrester

6

second arrester

7

first busbar

8th

second busbar

9

Battery case

10

electrically insulating layer

11

first page

12

second page

13

third party

14

fourth page

15

first opening

16

first lid

17

second opening

18

second lid

19

Electric motor

20

first bending area

21

second bending area

22

first electrode

23

second electrode

24

connecting bridge

25

partition wall

26

Gapfiller

27

Filling opening

28

transmission

29

Frame

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2014/0023906 A1 [0005]
• US 2020/0350548 A1 [0005]
• US 2020/0185682 A1 [0005]

Claims (10)

Battery (1) for an electric drive system (2) for a motor vehicle (3), comprising a plurality of battery cells (4), each with a first arrester (5) and a second arrester (6), a first busbar (7), a second busbar (8) and a battery housing (9), wherein the first busbar (7) and the second busbar (8) are partially covered by an electrically insulating layer (10), and wherein the first arresters (5) are connected to the first busbar (7 ) and the second arresters (6) are electrically coupled to the second busbar (8), characterized in that the first busbar (7) is on a first side (11) of the battery cells (4) and the second busbar (8) on one The second side (12) of the battery cells (4), which is different from the first side (11), is arranged. Battery (1). Claim 1 , characterized in that the second side (12) is opposite the first side (11). Battery (1). Claim 1 or 2 , characterized in that the first busbar (7) predominantly or completely covers the first side (11) of the battery cells (4), and / or that the second busbar (8) predominantly or completely covers the second side (12) of the battery cells (4). completely covers. Battery (1) according to one of the preceding claims, characterized in that the first busbar (7) extends over a third side (13) adjacent to the first side (11) of the battery cells (4), and/or that the second busbar ( 8) extends over a fourth side (14) adjacent to the second side (12) of the battery cells (4). Battery (1). Claim 4 , characterized in that the third side (13) is opposite the fourth side (14). Battery (1). Claim 4 or 5 , characterized in that the first busbar (7) predominantly or completely covers the third side (13), and/or that the second busbar (8) predominantly or completely covers the fourth side (14). Battery (1) according to one of the preceding claims, characterized in that the battery housing (9) surrounds the battery cells (4) on four sides, with a first opening (15) of the battery housing (9) through a first cover (16) and a second opening (17) of the battery housing (9) is closed by a second cover (18). Battery (1) according to one of the Claims 1 until 6 , characterized in that the battery housing (9) surrounds the battery cells (4) on five sides, a first opening (15) of the battery housing (9) being closed by a first cover (16). Electric drive system (2) for a motor vehicle (3), comprising an electric motor (19) for driving the motor vehicle (3), characterized in that the electric drive system (2) has a battery (1) according to one of the preceding claims. Motor vehicle (3), comprising an electric drive system (2) for driving the motor vehicle (3), characterized in that the electric drive system (2) is an electric drive system (2). Claim 9 is trained.

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