DE102018000112A1 - Battery with a plurality of battery cells - Google Patents

Abstract

The invention relates to a battery (10), in particular for a motor vehicle, having a plurality of battery cells (12), which are arranged at least partially in a coolant space (14) through which a coolant can flow. The coolant space (14) is delimited by a cooling jacket (20), which is connected in a fluid-tight manner to at least one battery cell housing (22) of at least one of the battery cells (12). The cooling jacket (20) is formed from a metal, which is fluid-tightly connected to the at least one battery cell housing (22) by welding.

Description

The invention relates to a battery having a plurality of battery cells, which are arranged at least partially in a coolant space through which a coolant can flow. The coolant space is delimited by a cooling jacket, which is connected in a fluid-tight manner to at least one battery cell housing of at least one of the battery cells.

The DE 10 2015 013 377 A1 describes a tempering device for a battery system with a cuboid hollow body, which has a connection device for supplying and a connection device for discharging a fluid. In breakthroughs of the hollow body cylindrical battery cells are added. By the hollow body, a liquid space is limited. In order to ensure that the liquid space is fluid-tight, a sealing element is provided which encloses the cylindrical battery cells.

Batteries such as high-voltage batteries, which are used for vehicle applications such as hybrid vehicles, plug-in hybrid vehicles or electric vehicles, and high-voltage batteries for stationary applications such as electricity suppliers or electricity storage include a plurality of electrically connected in series or electrically connected single cells or battery cells.

Within a battery, the battery cells are usually summarized in so-called cell blocks, each containing a certain number of battery cells including the devices for their mechanical fixation, for electrical contacting and optionally for temperature control, ie for cooling or heating of the battery cells. The cell block or cell blocks are in turn housed in a stable battery housing, which additionally includes means for electrical control and protection of the battery, such as a battery management system, contactors for connecting and disconnecting the electrical power, fuses, ammeters and the like. Furthermore, the battery case has external connections such as power supply and drainage, coolant supply and drainage, battery control port, and the like.

For particularly high demands on the cooling of the battery cells, as they occur in large charging currents and discharge currents, especially in conjunction with high internal resistance of the battery cells, a direct flow around the battery cells with a coolant makes sense. Such a direct flow around for cooling purposes or tempering purposes is referred to as direct cooling. In order to avoid short circuits as a result of leakage of the coolant and also because at least areas of surfaces of a battery cell housing of the respective battery cell or parts of the battery cell housing are live or potential-leading, is used for such a direct cooling usually an electrically non-conductive coolant.

It is possible, for example, the use of special oils such as transformer oil, silicone oil or the like, which, however, are flammable. This is not recommended for battery applications in terms of safety. As non-flammable coolant certain fluorocarbons can be used, such as those available under the name NOVEC ^® from the company 3M. Such, containing fluorocarbons coolant can be used for example in the direct cooling of electronic components. These liquid coolants are available with different boiling points, so that not only immersion bath cooling but also boiling bath cooling can be achieved with such fluorocarbon-containing coolants.

The disadvantage, however, in the use of such, fluorocarbons containing coolant, the diffusion behavior. Because the fluorocarbons can diffuse through any type of plastic wrap or plastic seals. This constantly requires a supplement of the very expensive coolant. An example of this is a battery or a battery pack, which is available from the company Kreisel Electric and has round cells of the type 18650. In this case takes place by means of a cooling NOVEC -Kühlmittels ^®, and the round cells enveloping cooling jacket is formed from plastic.

Object of the present invention is to provide an improved battery of the type mentioned.

This object is achieved by a battery having the features of patent claim 1. Advantageous embodiments with expedient developments of the invention are specified in the dependent claims.

The battery according to the invention, which can be used in particular as a traction battery for a motor vehicle, has a plurality of battery cells. The battery cells are arranged at least partially in a coolant space through which a coolant can flow. The coolant space is limited by a cooling jacket. The cooling jacket is fluid-tight with the at least one Battery cell housing connected to at least one of the battery cells. Here, the cooling jacket is formed of a metal, which is fluid-tightly connected to the at least one battery cell housing by welding. The coolant space is thus wrapped completely metallic without the use of plastic insulation or plastic seals. Accordingly, the at least one battery cell housing is a metallic housing, so that so-called hardcase cells are used as battery cells. In this way, an improved battery is created because diffusion of coolant out of the coolant space is prevented. In particular, it is thus possible to provide a battery with at least one diffusion-tight cell module in which direct cooling is provided. In a battery case of the battery, a plurality of such cell modules, which include a respective coolant space having a plurality of battery cells, may be provided.

Such a battery allows a highly efficient direct cooling, in which also volatile coolant, such as fluorocarbons containing coolant permanently enclosed in the coolant space. The metallic cooling jacket can also serve as a busbar at the same time, so that components can be saved. In addition, the safety of such a battery is particularly high when the coolant is a non-combustible material is used, but the fluorocarbons containing coolant.

Preferably, at least one electrical pole of at least one of the battery cells is arranged in the region of an opening which is formed in the cooling jacket. In other words, therefore, both poles or cell poles or at least one cell pole are led out through the corresponding opening or through openings in the cooling jacket, in order to enable current supply and / or current discharge. If only one pole is led out of the cooling jacket, as may preferably be provided in the case of polar battery cells in which an electrical pole of the battery cell is located on the battery cell housing, then the voltage of the second electrical pole lies on the cooling jacket. Accordingly, the cooling jacket is then preferably provided with a tap.

As a further advantage, it has been shown that at least one weld is formed at a location at which the cooling jacket rests against an end face of the at least one battery cell housing. The provision of the weld or the welds to connect the cooling jacket in the plane of such planar tops or bottoms of the battery cell housing, ie in the plane of the end face, is preferable for process engineering reasons. However, it is also possible to form a weld on a lateral surface of the battery cell housing, so to put the weld on the cell shell.

Preferably, a degassing opening of at least one of the battery cells is arranged in the region of a passage formed in the cooling jacket. Through such a degassing opening, which is also referred to as Ventingöffnung, an overpressure can be reduced defined, which can be set, for example, in the event of a short circuit or overcharging of the battery cell. Placing the vent opening so that it is aligned with the passage and thus located outside of the coolant space, causes the venting gases are not blown into the coolant.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or in the figures alone can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention. In the figures, identical or functionally identical elements are provided with identical reference numerals.

• 1 eine Batterie mit einer Batteriezelle, welche zwei auf einer Oberseite elektrisch isoliert aus einem Batteriezellengehäuse herausgeführte Pole aufweist, und mit einem auf einer Oberseite des Batteriezellengehäuses aufgeschweißten Kühlmantel;
• 2 eine Batterie mit einer Batteriezelle, welche einen auf einer Oberseite herausgeführten Pluspol aufweist, und mit dem auf der spannungsführenden Batteriezellengehäuseoberseite aufgeschweißten Kühlmantel, der zugleich dem Abgriff der Spannung dient;
• 3 eine Batterie mit einer Batteriezelle, welche auf einer Oberseite und einer Unterseite elektrisch isoliert aus einem nicht spannungsführenden Batteriezellengehäuse herausgeführte Pole aufweist, und mit dem auf die beiden Stirnflächen des Batteriezellengehäuses aufgeschweißten Kühlmantel;
• 4 eine Batterie mit einer Batteriezelle, welche zwei auf der Oberseite elektrisch isoliert aus dem Batteriezellengehäuse herausgeführte Pole aufweist, und mit dem auf eine Seitenwand des Batteriezellengehäuses aufgeschweißten Kühlmantel;
• 5 ein diffusionsdichtes Zellmodul einer Batterie, mit drei in dem Zellmodul elektrisch in Reihe geschalteten Batteriezellen und auf Stirnflächen der äußeren Batteriezellen aufgeschweißtem Kühlmantel;
• 6 eine schematische Explosionsdarstellung vor der Montage und Schweißung eines diffusionsdichten Zellmoduls mit sieben Batteriezellen, welche als Rundzellen des Typs 21700 ausgebildet sind;
• 7 eine schematische Darstellung des diffusionsdichten Zellmoduls gemäß 6, wobei eine Schnittdarstellung nach der Montage und Schweißung gezeigt ist;
• 8 in einer Explosionsdarstellung eine Perspektivansicht von Komponenten des diffusionsdichten Zellmoduls, wobei Abstandshalter auf die Batteriezellen aufgeschoben werden, um einen Zellpack zu bilden;
• 9 eine Perspektivansicht beim Aufschieben eines Zellmodulbechers und eines Zellmoduldeckels auf den Zellpack;
• 10 eine Perspektivansicht von Komponenten des diffusionsdichten Zellmoduls nach dem Verschweißen des Zellmodulbechers mit dem Zellmoduldeckel;
• 11 eine Perspektivansicht gemäß 10, wobei auf den Zellmodulbecher eine Isolationsplatte und ein Zellverbinder aufgesetzt werden;
• 12 die Perspektivansicht des diffusionsdichten Zellmoduls nach dem Anbringen des Zellverbinders und der Isolationsplatte an dem Zellmodulbecher;
• 13 eine Längsschnittansicht des Zellmoduls gemäß 12;
• 14 eine Querschnittsansicht des Zellmoduls gemäß 12, wobei einer der Abstandshalter eine Kühlmittel-Leitfunktion aufweist;
• 15 in einer perspektivischen Explosionsdarstellung einen Zellblock, welcher drei Zellmodule gemäß 12 umfasst;
• 16 den Zellblock gemäß 15 mit an den Zellmodulen angebrachten, metallischen Kühlmittelleitungen; und
• 17 eine Schnittansicht des Zellblocks gemäß 16.

Showing:

• 1 a battery having a battery cell, which has two poles electrically led out on a top side out of a battery cell housing, and having a cooling jacket welded onto an upper side of the battery cell housing;
• 2 a battery having a battery cell having a positive pole led out on an upper side, and having the cooling jacket welded on the live battery cell housing upper side and at the same time serving to tap the voltage;
• 3 a battery having a battery cell, which on an upper side and a lower side electrically insulated from a non-live battery cell housing led out pole, and with the welded on the two end faces of the battery cell housing cooling jacket;
• 4 a battery having a battery cell, which has two electrically insulated on the top of the battery cell housing led out pole, and with a on a Side wall of the battery cell housing welded cooling jacket;
• 5 a diffusion-tight cell module of a battery, with three battery cells electrically connected in series in the cell module and a cooling jacket welded onto end faces of the outer battery cells;
• 6 a schematic exploded view before assembly and welding of a diffusion-tight cell module with seven battery cells, which are designed as round cells of the type 21700;
• 7 a schematic representation of the diffusion-tight cell module according to 6 showing a sectional view after assembly and welding;
• 8th in an exploded view, a perspective view of components of the diffusion-tight cell module, wherein spacers are pushed onto the battery cells to form a cell pack;
• 9 a perspective view when pushing a cell module cup and a cell module cover on the cell pack;
• 10 a perspective view of components of the diffusion-tight cell module after welding the cell module cup with the cell module cover;
• 11 a perspective view according to 10 wherein an insulation plate and a cell connector are placed on the cell module cup;
• 12 the perspective view of the diffusion-tight cell module after attaching the cell connector and the insulating plate to the cell module cup;
• 13 a longitudinal sectional view of the cell module according to 12 ;
• 14 a cross-sectional view of the cell module according to 12 wherein one of the spacers has a coolant directing function;
• 15 in a perspective exploded view of a cell block, which three cell modules according to 12 includes;
• 16 according to the cell block 15 with attached to the cell modules, metallic coolant lines; and
• 17 a sectional view of the cell block according to 16 ,

1 shows a schematic diagram of a battery 10 with a battery cell 12 , The battery cell 12 is thus in a coolant space through which a coolant can flow 14 arranged that only electric poles 16 . 18 the battery cell 12 from a the coolant space 14 limiting cooling jacket 20 protrude. The battery cell 12 has a metallic battery cell case 22 on and the electric poles 16 . 18 are opposite this metallic battery cell case 22 by means of respective insulation 24 electrically isolated. The in 1 shown construction of the battery cell 12 is typical of prismatic battery cells, which are designed as hardcase cells, in which therefore the battery cell housing 22 Stiffness is.

For cooling the battery 10 In the present case, a direct cooling is realized in which the battery cells, of which in 1 only schematically the battery cell 12 is shown, are flowed around directly by the coolant, if this through the coolant space 14 is promoted through. For supplying and discharging the coolant are in the cooling jacket 20 a feed 26 and a process 28 educated.

The electrically non-conductive coolant may include fluorocarbons and / or mineral oils and / or silicone oils and / or distilled water. As the coolant is preferably a fluorocarbon-containing coolant is used, which may have a relatively low boiling point, so that not only a Tauchbadkühlung, but also a Siedebadkühlung is feasible.

So that the coolant does not escape from the coolant space 14 can escape, is the cooling jacket 20 , which is also formed here from a metal, by welding fluid-tight with the battery cell housing 22 connected. Appropriate welds 30 are at the in 1 shown battery 10 on a top or top end 32 the battery cell 12 educated.

At the in 2 shown variant of the battery 10 is the first pole 18 , which may be, for example, the positive pole, on the top of the battery cell housing 22 from the battery cell case 22 led out. Such a configuration is typical for round cells, such as round cells of the format or type 18650 or the format or type 21700 , In this case, the second electrical pole, for example the negative pole, is through the battery cell housing 22 provided. Since the metallic cooling jacket 20 at the welds 30 fluid-tight with the battery cell housing 22 is connected, there is also the cooling jacket 20 at the same electrical potential as the battery cell housing 22 , Accordingly, on the cooling jacket 20 a tap 34 be provided for the voltage.

At the in 3 shown variant of the battery 10 are the electric poles 16 . 18 the battery cell 12 on the top side 32 and on a lower front side 36 from the battery cell case 22 led out. This is a typical design for certain types of round cell battery cells 12 , In this embodiment, the cooling jacket 20 via respective welds 30 with the top side 32 on the one hand and with the lower end side 36 on the other hand via respective welds 30 connected fluid-tight.

The battery 10 according to 4 is essentially the same as in 1 illustrated battery 10 , Again, accordingly, the two electrical poles 16 . 18 on the top side 32 electrically isolated from the battery cell housing 22 led out, as is typical for prismatic hardcase cells. However, here is the cooling jacket 20 over the welds 30 with a jacket area 38 or a side wall of the battery cell housing 22 fluid-tight connected by welding.

According to 5 are three battery cells 12 with respect to 3 described type electrically connected in series. The electric poles 16 . 18 the completely inside the cooling jacket 20 arranged battery cell 12 So are with the electric poles 16 . 18 those battery cells 12 electrically connected, of which one of the electrical poles 16 . 18 over in the cooling jacket 20 provided openings is accessible from the outside. Also in this embodiment, the cooling jacket 20 on the top side 32 one of the marginal battery cells 12 welded. In an analogous way, the cooling jacket 20 on the underside of the front 36 another randliche battery cell 12 or edge cell welded.

6 schematically shows a cell module 40 the battery 10 in the condition before assembly and welding. Hereby is by cell cover 42 of electrically parallel connected battery cells 12 of which in 6 only three battery cells 12 are shown, one of the electrical poles 16 . 18 , For example, the positive pole provided. The further electrical pole, for example, the negative pole of the respective battery cell 12 , is through cell cups 44 the respective battery cells 12 provided. seals 46 the respective battery cell 12 ensure the electrical insulation of the cell lid 42 opposite the cell cup 44 , A package of such battery cells 12 of the battery module or cell module 40 is in the cooling jacket 20 arranged, which a module cup 48 or cell module cups and a module lid 50 , So a cover for the cell module cup includes. In the module cup 48 are passages 52 educated. About these passages 52 can in the assembled state of the cell module (cf. 7 ) the cell lids 42 the battery cells 12 and thus the positive poles of the battery cells 12 be contacted electrically.

Furthermore, the module cup 48 at respective welds 30 with the cell cups 44 the battery cells 12 welded fluid-tight. This is done by the parallel connection of the battery cells 12 the metallic cooling jacket 20 the function of otherwise additionally required cell connectors or busbars. Furthermore, the module cover 50 on further welds 54 with the module cup 48 welded fluid-tight. The coolant space 14 for the coolant containing the fluorocarbons is complete with the metallic cooling jacket 20 envelops. The welds 30 run in the field of cell cups 44 preferably around the cell lids 42 around. In the field of cell lids 42 In the present case, degassing openings are provided, which are also referred to as vent openings. Through these degassing, the respective battery cell 12 outgas when there is an overpressure inside of the cell cup 44 and the cell lid 42 formed battery cell housing 22 comes.

In 7 is such outgassing, which in the area of the passages 52 takes place and thus through the cooling jacket 20 is not obstructed by arrows 56 illustrated. In the diffusion-tight cell module 40 So it is ensured that the venting gases are not injected into the coolant.

Components of in 7 schematically shown cell module 40 are in 8th shown in a perspective view. It can be seen that the cell module 40 in the present case seven individual battery cells 12 which, for example, as round cells of the type 21700 are formed. Furthermore, in 8th the venting openings or degassing openings 58 the battery cells 12 shown. These degassing openings 58 are usually closed by a rupture disc or the like, which opens at pressure. In addition, in 8th in this case made of plastic spacers 60 shown which the battery cells 12 of the cell module 40 Keep away from each other. The spacers 60 have passage openings 62 on. The spacers 60 become so on the battery cells 12 postponed that after inserting the battery cells 12 in a respective passage opening 62 the battery cells 12 in the passages 62 are arranged.

A cell packet 64 which the battery cells 12 and those on the battery cells 12 deferred spacers 60 includes, is in 9 shown in perspective. Furthermore, in 9 the module cup 48 and the module cover 50 shown in perspective, wherein the module cup 48 and the module cover 50 are preferably formed from a steel sheet. Moreover, in 9 for example, as the feed 26 trained coolant connection shown, which on the module cup 48 is provided.

While 9 the cell pack 64 before pushing on the module cup 48 on the cell pack 64 and before attaching the module cover 50 shows is in 10 the arrangement after welding the module cup 48 with the module cover 50 shown. Here is between the module cup 48 and the module cover 50 the trained as a lap weld, circumferential weld 54 (see 7 ) finished. Furthermore, between a floor 66 of the module cup 48 and the cell cups 44 the battery cells 12 (see 7 ) the respective weld 30 formed, which is also preferably designed as a lap weld.

To do that in 7 schematically shown cell module 40 is provided to the cell pack 64 an insulation plate 68 made of plastic (compare 11 ). This insulation plate 68 has passages 70 on, through which the cell lids 42 the battery cells 12 pass through when the insulation board 68 on the ground 66 of the module cup 48 is applied. Furthermore, in 11 a cell connector 72 of the cell module 40 shown, which is formed here from a steel sheet.

This cell connector 72 contacted in the assembled state of the cell module 40 (see 12 ) the cell lids 42 the battery cells 12 , For electrically conductive connection of the cell connector 72 with the cell lids 42 is preferably between the cell connector 72 and the cell lids 42 , ie the positive poles of the battery cells 12 , a respective weld joint in the form of an overlap weld 74 educated. In the area around these lap welds 74 around are both in the cell connector 72 as well as in the insulation board 68 Through openings 76 educated. About these openings 76 In the event of a fault, venting gases can flow unhindered from the battery cells 12 escape. Furthermore, in the present case, the cell connector 72 a tab 78 on, through which one of the electrical connections of the cell module 40 is formed, in this case, for example, the positive pole. The additional electrical connection, in the present case the negative pole, is through the cooling jacket 20 of the cell module 40 educated.

13 shows the diffusion-tight cell module 40 according to 12 in a sectional view. Here are the battery cells 12 flows around directly from the coolant. While the negative pole on the up to the edge of the top or front 32 of the battery cell case 22 extending cell cup 44 is the positive pole as a raised part of the cell lid 42 formed and through the battery cell housing 22 isolated passed. The cell cup 44 and the cell lid 42 are preferably made of a nickel-plated steel sheet. Around the positive pole are located on the top or front side 32 the respective battery cell 12 the venting openings or degassing openings 58 the respective battery cell 12 ,

For positioning the battery cells 12 and to form the mechanically stable cell stack 64 become the perforated spacers 60 made of plastic from above and below over the battery cells 12 pushed. The cooling jacket 20 is from the module cup 48 and the module cover 50 formed, which are preferably designed as deep-drawn parts made of nickel-plated steel sheet. By this configuration of the cooling jacket 20 from the same material as the battery cell case 22 becomes the fluid-tight welding of the cooling jacket 20 with the battery cell housings 22 facilitated. The module cup 48 is provided with respective nozzles for the supply and discharge of the coolant through which the inlet 26 and the process 28 is provided (see 7 ).

That through the spacers 60 held together package of battery cells 12 will be in the module cup 48 pushed, with the positive poles of the battery cells 12 and their vent openings or degassing openings 58 through corresponding recesses 80 stick out, which in the ground 66 of the module cup 48 are trained (see 9 ). Subsequently, the welding of the upper sides of the battery cell housing takes place 22 with the ground 66 of the module cup 48 through the annular and closed welds 30 (see 7 ), which are preferably designed as lap seams and produced by laser welding. This will cause the battery cells 12 of the cell packet 64 simultaneously electrically connected in parallel on its negative side.

The following will close the cooling jacket 20 the module cover 50 with the module cup 48 welded. For electrical parallel connection of the plus side of the battery cells 12 becomes the cell connector 72 welded, being used for electrical insulation between the ground 66 of the module cup 48 (see 9 ) and the underside of the cell connector 72 the thin insulation board 68 is arranged. The insulating plate formed of plastic 68 and the cell connector 72 are with the present case designed as slots passages 76 provided, which preferably geometrically with the vent openings 58 the battery cells 12 correspond and thus, if necessary, allow the discharge of venting gas into the open air.

Out 14 It can be seen that for uniform distribution of coolant to the individual battery cells 12 inside the cell module 40 baffles 82 may be provided, which preferably by the spacers 60 are provided, ie in particular integrally with the spacers 60 are formed. In 14 are such baffles 82 exemplified. The coolant conductivity of the spacers 60 provides a uniform flow and temperature control of the battery cells 12 for sure.

In 15 is a cell block 84 the battery 10 shown in an exploded view, which a plurality of in 12 shown cell modules 40 includes, in the present example, three such cell modules 40 are shown in perspective. To form the cell block 84 So will several cell modules 40 electrically connected in series. The cell connectors 72 , which with the tab 78 or such a contact lug are provided, in each case with the module cup 48 of the adjacent cell module 40 welded. The individual cell modules 40 of the cell block 84 be via a distribution line 86 supplied with the tempered coolant. After the flow through the cell modules 40 the coolant is via a manifold 88 discharged again and fed, for example, a cooler.

These coolant lines are also metallic to prevent diffusion. Therefore, here are between respective sections 90 the distribution line 86 on the one hand and between corresponding sections 92 the manifold 88 on the other hand, intermediate pieces 94 made of an electrically insulating material, for example of a ceramic material.

The sections 90 the distribution line 86 have respective connecting pieces 96 on, which with the respective inlet 26 the cell modules 40 get connected. In an analogous way, the sections 92 the manifold 88 spigot 98 on, which at the respective expiration 28 of the respective cell module 40 be connected. 15 shows the cell block 84 before assembly.

In contrast, shows 16 the completely assembled cell block 84 , preferably between the tabs 78 the cell connector 72 and the module cups 48 Überlappschweißnähte 100 are formed. Moreover, in 16 the distribution line 86 to the cell modules 40 connected shown.

17 shows the cell block 84 in a sectional view.

LIST OF REFERENCE NUMBERS

10

battery

12

battery cell

14

Coolant space

16

pole

18

pole

20

cooling jacket

22

Battery cell housing

24

insulation

26

Intake

28

procedure

30

Weld

32

front

34

tap

36

front

38

cladding region

40

cell module

42

cell cover

44

cell can

46

poetry

48

module cups

50

module cover

52

passage

54

Weld

56

arrow

58

vent

60

spacer

62

Through opening

64

cell package

66

ground

68

insulation plate

70

Through opening

72

cell connectors

74

lap weld

76

Through opening

78

flap

80

recess

82

vane

84

cell block

86

distribution line

88

manifold

90

section

92

section

94

connecting piece

96

spigot

98

spigot

100

lap weld

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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

• DE 102015013377 A1 [0002]

Claims (7)

Battery, in particular for a motor vehicle, having a plurality of battery cells (12) which are arranged at least partially in a coolant space (14) through which a coolant can flow, wherein the coolant space (14) is bounded by a cooling jacket (20) which is fluid-tight with at least one battery cell housing (22) of at least one of the battery cells (12) is connected, characterized in that the cooling jacket (20) is formed of a metal which is fluid-tightly connected to the at least one battery cell housing (22) by welding. Battery after Claim 1 , characterized in that at least one electrical pole (16, 18, 42) of at least one of the battery cells (12) is arranged in the region of an opening (52) which is formed in the cooling jacket (20). Battery after Claim 1 or 2 , characterized in that at least one weld (30) is formed at a location at which the cooling jacket (20) on an end face (32, 36) of the at least one battery cell housing (22). Battery after one of the Claims 1 to 3 , characterized in that a degassing opening (58) of at least one of the battery cells (12) in the region of a in the cooling jacket (20) formed passage (80) is arranged. Battery after one of the Claims 1 to 4 , characterized in that the battery cells (12) by means of at least one spacer (60) are kept at a distance from each other, which has a plurality of passage openings (62) in which the battery cells (12) are arranged. Battery after Claim 5 , characterized in that the spacer (60) for distributing the coolant in the coolant space (14) formed guide elements (82). Battery after one of the Claims 1 to 6 , characterized in that the coolant is electrically non-conductive.

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