Battery system

Abstract

The invention relates to a battery system (6) comprising a battery system housing (20) and at least one electrochemical battery cell (8) received therein, wherein the battery cell (8) has a degassing device (22) with a defined degassing direction, wherein the battery system housing (20) has a high-voltage area (26) and a gas area (28) which are separated from each other by an intermediate wall (18), wherein an opening (30) connecting the high-voltage area (26) and the gas area (28) is provided in the intermediate wall (18), wherein the battery cell (8) is arranged in the high-voltage area (26) such that the degassing direction is directed towards the opening (30), wherein the intermediate wall (18) has a corrugated conical deformation (32, 32') which tapers obliquely towards the opening (30) in the degassing direction, and wherein a sealing element (40, 40') surrounding the opening (30) such between the transformation (32,32') and the battery cell (8) is arranged such that the sealing element (40, 40') is pressed radially outwards from the opening (30) and along a conical slope (36, 36') of the deformation (32, 32') towards the battery cell (8) in the event of a pressure increase in the gas area (28) due to degassing.

Description

[0001] The invention relates to a battery system comprising a battery system housing and at least one electrochemical battery cell accommodated therein. The invention further relates to a vehicle battery and a motor vehicle driven or drivable by an electric motor.

[0002] Electric or electric-powered vehicles, such as electric, hybrid, plug-in, or fuel cell vehicles, typically include an electric motor that can drive one or both axles. To supply electrical energy, the electric motor is typically connected to an on-board (high-voltage) battery that serves as an electrical energy storage device.

[0003] An electrochemical battery, in particular, is understood here and below to mean a so-called secondary battery (secondary battery) of a motor vehicle. In such a (secondary) vehicle battery, consumed chemical energy can be recovered by means of an electrical charging process. Such vehicle batteries are designed, for example, as electrochemical accumulators, in particular as lithium-ion accumulators.

[0004] To generate or provide a sufficiently high operating voltage, such vehicle batteries or battery systems typically have at least one battery module (battery cell module) in which several individual battery cells are interconnected in a modular fashion. Alternatively, a so-called cell-to-pack design is possible, in which the battery cells are directly interconnected to form the battery system rather than pre-assembled into modules.

[0005] To reduce heat losses, the interconnected battery modules or battery cells have the lowest possible internal electrical resistance. However, due to these low internal resistances, comparatively high short-circuit currents occur in the event of an electrical short circuit. Due to the high packing or energy density in vehicle batteries, there is a risk of a self-reinforcing chain reaction, known as thermal runaway, occurring, for example, due to an internal short circuit or overcharging of the battery cell. Thermal runaway of the battery cell can also be triggered by, for example, severe thermal stress on the battery cell, internal manufacturing defects, or mechanical damage to the battery cell.

[0006] Thermal runaway is a condition that involves an exponential temperature increase within the battery system or battery cell, causing the battery cell to heat up very quickly. The energy released in this process can trigger further exothermic reactions in neighboring battery cells. Further thermal runaway of other battery cells is also known as thermal propagation. Due to the energy released in the form of heat, temperatures in the battery system reach several hundred degrees Celsius in a short period of time. Thermal propagation can result in a fire in the battery system.

[0007] Thermal runaway is an exothermic chemical reaction in which, on the one hand, a high level of heat energy is released and, on the other hand, a gas is formed in the affected battery cells, particularly due to electrolyte decomposition and other side reactions, which causes high internal pressure in the battery cell. As a result, the battery cell can deform, burn, or even release the gas pressure explosively. Such thermal runaway or a fire due to spontaneous combustion of the vehicle battery can also occur if the battery system is damaged, for example, in a vehicle accident or crash.

[0008] The gas flow escaping from the battery cells (gas volume flow) exhibits a high volume flow and a high (gas) temperature. The gas flow carries conductive and glowing particles or solids out of the battery cell. There is a risk that the glowing and conductive particles contained in the gas flow could cause further electrical short circuits if the gas flow impinges on a high-voltage component, such as a module connector, causing the fire to spread further or system components to be damaged by arcing.

[0009] Battery cells typically have venting devices for the controlled degassing of flammable (hot) gases and high-energy particles. Such pressure equalization devices, also known as vents, are designed, for example, as bursting discs or pressure relief valves to vent the gas flow in a predetermined degassing direction in the event of a fault. The emitted gas flow must be vented to the environment, separate from the high-voltage components and battery cells, to prevent the triggering of further thermal propagation reactions in neighboring battery cells, i.e., thermal propagation within the battery system. Spatial separation of the gas particle flow from the high-voltage components is extremely important to avoid potentially harmful electrical phenomena (short circuits, arcing).

[0010] For this purpose, it is known, for example, from DE 10 2009 046 385 A1, to divide the battery system housing into a high-voltage section accommodating the high-voltage components and battery cells, and a gas section dissipating the gas flow. This requires reliable and operationally safe sealing of the two sub-volumes. Viscous materials (adhesives, gap fillers, etc.) or simple seals, for example, are integrated to separate the sections. The use of simple sealing elements often results in inadequate sealing effects and challenges in production, as they are often difficult to handle. The use of viscous materials such as adhesives, etc., also creates challenges in production (drying time). Furthermore, the use of adhesives leads to challenges when these battery systems are being maintained, serviced, or repaired.

[0011] DE 10 2014 200 203 A1 describes a battery system in which a deformation means is provided to seal leaks caused by degassing pressure, which deforms due to an occurring degassing pressure and presses on the sealing element in order to increase a sealing pressure.

[0012] DE 10 2020 125 651 A1 discloses a conical through-hole between the high-voltage and gas areas, which is surrounded by a coolant line. An opening element is incorporated into the wall of the through-hole, which opens in the event of a fault and floods the through-hole (as well as the degassing battery cell) with coolant.

[0013] The invention is based on the object of providing a particularly suitable battery system. In particular, a reliable seal between a high-voltage area and a gas area is to be ensured in the event of a thermal runaway. The invention is further based on the object of providing a particularly suitable vehicle battery and a particularly suitable motor vehicle.

[0014] With regard to the battery system, the object is achieved according to the invention with the features of claim 1, with regard to the vehicle battery with the features of claim 9, and with regard to the motor vehicle with the features of claim 10. Advantageous embodiments and further developments are the subject of the dependent claims (subclaims). The advantages and embodiments cited with regard to the battery system are also transferable mutatis mutandis to the vehicle battery and / or the motor vehicle, and vice versa.

[0015] The conjunction “and / or” is to be understood here and in the following in such a way that the features linked by this conjunction can be formed both together and as alternatives to one another.

[0016] The battery system according to the invention comprises a battery system housing and at least one electrochemical battery cell accommodated therein. In particular, a number of battery cells, for example in the form of battery modules or as a cell-to-pack configuration, are arranged in the battery system housing.

[0017] The or each battery cell comprises a degassing device for degassing (outgassing), particularly during thermal runaway. The degassing device is designed, for example, as a rupture disc or a pressure relief valve and has a defined degassing direction. This means that during degassing, the gas flow escaping from the battery cell (for example, hot gas and high-energy particles) is oriented along a predetermined direction.

[0018] The battery system housing is divided by a partition wall into a high-voltage area, in which the battery cells and, if applicable, other (high-voltage) components of the battery system are arranged, and a gas area (outgassing area, degassing area), which is provided for discharging the degassed gas flow (degassing flow). The bulkhead-like partition wall is designed, for example, as a floor plate of the high-voltage area and has a hole- or window-like (through-) opening, wherein the battery cell is arranged in the high-voltage area such that the degassing direction is directed toward the opening. In other words, the degassing direction is oriented approximately perpendicular to the opening plane.

[0019] In the following, the degassing direction is assumed - without loss of generality - to be along a Z-axis, i.e. a height direction of the battery system, with the opening plane being arranged in a transverse XY plane.

[0020] According to the invention, the partition wall has a bead-like, conical shape that tapers diagonally toward the opening in the degassing direction. A sealing element (venting seal) that surrounds the opening is arranged between the shape and the battery cell in such a way that, in the event of a degassing-induced pressure increase in the gas region, the sealing element is pressed radially outward from the opening and along the conical slope of the shape toward the battery cell. This results in a particularly suitable battery system with improved sealing between the high-voltage region and the gas region.

[0021] The sealing element, embodied, for example, as a sealing ring or sealing strip, is preferably elastically or deformably compressible and is arranged at least partially displaceably along the bevel of the deformation. In its initial state, the sealing element is sealingly positioned in the opening-side region of the bevel. The sealing element is clamped between a base of the battery cell associated with the partition wall and the deformation or bevel with a certain sealing pressure or a certain (mechanical) preload. The sealing element is thus held force-fit between the battery cell and the bevel.

[0022] The invention thus implements a sealing concept for the spatial separation of the high-voltage and gas areas, particularly in the event of thermal runaway of one or more battery cells in the battery system. The sealing concept combines a local deformation of the partition wall, which spatially separates the battery cells (the cell stack) from the gas area, with a circumferential sealing element. The local deformation is characterized by a conically tapered slope, sloping toward the opening for the degassing flow.

[0023] The battery cells or cell stack are preferably positioned on the sealing element. The positioning of the battery cells is simplified by the beveled partition wall, whereby the sealing element is compressed or squeezed together by the battery cells when installed. In the event of thermal runaway of an individual cell, a strong increase in pressure occurs in the gas region due to the degassing process. The pressure presses the sealing element into the tapered sealing plane towards the battery cell bases, which leads to a locally increased sealing effect and improves the spatial separation between the high-voltage and gas regions in the event of thermal runaway, thus reducing the risk of thermal propagation or the occurrence of short circuit effects. The permissible force exerted on the battery cells in the z-direction can be exceeded, thus maximizing the sealing effect.

[0024] The invention is thus based on functionally integrating the seal between the high-voltage and gas areas in the event of a thermal runaway in the battery system, as well as assisting the positioning of the cell stack through local deformations in the base plate or the partition wall. The sealing effect is further enhanced by the pressure applied from the gas area, thus acting as a self-reinforcing seal.

[0025] Preferably, no additional process steps are required during assembly. Due to its simple design, the elimination of additional components, and simplified assembly, the battery system according to the invention is particularly cost-effective. Furthermore, the sealing concept according to the invention can be transferred to existing battery systems without fundamental design changes.

[0026] For example, it is conceivable for each battery cell or each degassing device to be assigned its own opening with a sealing element. Alternatively, each battery cell can be assigned an opening, with all openings encompassed by a common sealing element. Preferably, the opening is approximately elongated and extends over several battery cells or degassing devices, and is sealed by a common sealing element.

[0027] In an advantageous embodiment, the formed portion or bevel has an edge collar that defines the opening and is bent toward the battery cells, opposite to the degassing direction. The tapered portion is thus terminated by a "nose" in front of the opening. This creates a circumferential "groove" into which the sealing element can be inserted. This advantageously and easily prevents the sealing element from accidentally slipping into the opening. Furthermore, the edge collar facilitates the positioning of the sealing element, which improves the assembly process and reduces positioning tolerance.

[0028] In a conceivable further development, the formed portion has a receiving area adjacent to the slope for holding the battery cells. The receiving area can be designed as a recess, making it easier to position the battery cells during assembly of the battery system. The slope can extend essentially over the entire length of the battery cells. Alternatively, the slope can be shortened and extend only over a portion of the battery cells if a larger support surface is required for the battery cells, for example, for temperature control or cooling purposes.

[0029] In a suitable embodiment, the opening is covered by a cover. In other words, the opening is closed to protect the cell vents, for example, by a channel-shaped cover. This would initially increase the pressure even further in the event of a thermal runaway. The channel-shaped cover has, for example, openings, bursting discs, or pressure equalization elements at predetermined locations. During a thermal runaway, it can additionally or alternatively be provided that local melting is caused in the cover area, which creates a direct connection to the gas region.

[0030] An additional or further aspect of the invention provides that the partition wall is designed as a cooling plate through which coolant (cooling fluid, cooling medium) flows or can flow. This means that coolant lines are integrated into the cooling plate. This allows the battery cells and / or the degassing flow to be cooled.

[0031] In a preferred development, the sealing element is designed as a hose through which coolant flows, wherein the hose is connected in particular to the cooling plate or the coolant lines integrated therein. The sealing element can therefore be formed by a hose that is connected to the cooling plate and through which coolant flows. This integrates the sealing and temperature control functions in one component. Furthermore, this development enables easier clamping of the entire cell stack during assembly of the battery system. If the coolant flows through the sealing element or the hose, the cross-section of the hose increases as a result of the internal pressure, thereby clamping the battery cells sitting on it.

[0032] In a practical embodiment, a cooling system is arranged flush with the battery cell. The cooling system can be arranged on or in the partition wall or cooling plate. In other words, the cooling system is integrated into the cooling plate, for example, as a coolant channel. Alternatively, the cooling system is arranged, for example, as a coolant line on the side of the partition wall opposite the battery cell, i.e., in the gas area. This allows for improved thermal contact with the cell or cell stack, thereby increasing the cooling effect.

[0033] The vehicle battery according to the invention is designed, for example, as a traction battery for an electrically powered or drivable motor vehicle. The vehicle battery has a battery system as described above. This results in a particularly suitable vehicle battery that offers improved safety, particularly with regard to thermal runaway and thermal propagation.

[0034] The electrically driven or drivable motor vehicle according to the invention has a battery system as described above. This results in a particularly suitable motor vehicle.

[0035] Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. In schematic and simplified representations, the drawings show: Fig. 1 a motor vehicle with a battery system, Fig. 2 in perspective the battery system, Fig. 3 section of the battery system in normal operation, Fig. 4 section of the battery system in case of thermal runaway, Fig. 5 a top view of a cell stack of the battery system, Fig. 6 shows a section of a second version of the battery system, Fig. 7 shows a section of a third version of the battery system, Fig. 8 shows a section of a fourth embodiment of the battery system, and Fig. 9 shows a section of a fifth version of the battery system.

[0036] Corresponding parts and sizes are always provided with the same reference symbols in all figures.

[0037] The Fig. Figure 1 shows an electrically powered or drivable motor vehicle 2, for example, an electric or hybrid vehicle. The motor vehicle 2 has an electric motor (not shown in detail) as an electric traction drive, which is connected to a traction or vehicle battery 4 for supplying electrical energy.

[0038] The vehicle battery 4 has a Fig. 2, the electrochemical battery system 6 comprises a number of electrochemical battery cells 8. The battery cells 8 are provided with reference numerals in the figures merely as examples.

[0039] In the following, information regarding the spatial directions is also provided, in particular, in a coordinate system of the motor vehicle (vehicle coordinate system) with respect to an exemplary installation situation of a battery system 6 in a vehicle floor. The abscissa axis (X-axis, X-direction) is oriented along the vehicle's longitudinal direction (direction of travel), the ordinate axis (Y-axis, Y-direction) along the vehicle's transverse direction, and the applicate axis (Z-axis, Z-direction) along the vehicle height.

[0040] To generate or provide a sufficiently high operating voltage, the battery cells 8 can be modularly connected to at least one battery module. Fig. In the embodiment shown in Figure 2, the battery system 4 is implemented in a so-called Cell2Pack design, in which the battery cells 8 are directly interconnected as a cell stack 10 and are not pre-assembled into modules. For example, the battery cells 8 are stacked along the X-direction or arranged in a row.

[0041] The battery cells 8 are designed, for example, as prismatic cells and thus have a prismatic or cuboid-shaped cell housing 12. The housing surfaces of each cell housing 12 that are opposite one another in the X direction or row or stack direction are referred to below as the end faces of the respective cell housing 12. The sides of the cell housing 12 oriented perpendicular to the Y direction are referred to as the narrow sides. The battery poles 14, 16 of the respective battery cell 8 are arranged on the opposite narrow sides of the cell housing 12. The battery cells 8 are arranged on an intermediate wall 18 in a battery system housing 20, wherein the housing surfaces sitting on the intermediate wall 18 are referred to as the base of the respective cell housing 12.

[0042] Each battery cell 8 or each cell housing 12 has - as for example in Fig. 3 - a degassing device 22 for degassing (outgassing), in particular in the course of a thermal runaway. The degassing device 22 has a degassing opening (venting opening), from which a gas stream (venting gas) 24 ( Fig. 4) can escape. The degassing device 22 has a defined degassing direction, which in the illustrated embodiment is oriented perpendicular to the floor, i.e., along the Z-direction. The degassing device 22 is thus directed toward the partition wall 18.

[0043] The bulkhead-like partition wall 18, acting as a base plate, separates the interior of the battery housing 20 into two chambers or partial interior spaces, which are also referred to below as the high-voltage area 26 and the gas area 28. The battery cells 8 are arranged in the high-voltage area 22. The gas area (outgassing area, degassing area, venting gas area) 24 is provided and configured to discharge the gas flow 24 from the battery system housing 20. The partition wall 18 can be designed as a cooling plate with integrated coolant lines / channels, thus enabling temperature control of the battery cells 8.

[0044] The intermediate wall 18 has a (through) opening 30 through which the gas stream 24 from the degassing devices 22 can flow into the gas region 28. The opening 30 is bordered by a bead-like, conical deformation 32 of the intermediate wall 18, which engages in the gas region 28. The deformation 32 has a step-like shoulder towards the high-voltage region 26, which forms a receiving area 34 recessed in the intermediate wall 18 for the battery cells 8. Adjacent to the receiving area 34 at the bottom is a conical or funnel-like slope 36, which surrounds and delimits the opening 30 at the edge. The slope 36 runs at an acute (inclination) angle with respect to the intermediate wall 18. For example, the angle of inclination is approximately 10°. In other words, the deformation 32 is bevelled and tapered, and tapers towards the opening 30.

[0045] Thus, between the slope 36 and the bottom of the battery cells 8, a gap region is formed which is approximately wedge-shaped in cross section and whose height or clear width tapers outwards from the opening.

[0046] The bevel 36 is provided at its free end with a collar 38 that is bent or raised toward the high-voltage area 26. The tapered deformation 32 is thus closed off toward the opening edge by an upstanding "nose." This creates a circumferential (receiving) channel or groove in which a sealing element 40 surrounding the opening 30 is arranged.

[0047] In the Fig. During normal operation of the battery system 6 shown in Figure 3, the sealing element 40, designed, for example, as a sealing ring, is arranged in the receiving groove of the forming portion 32, wherein the battery cells 8 or the cell stack 10 is inserted into the receiving area 34 and thus presses against the sealing element 40 in a clamping manner in the z-direction. The sealing element 40 is therefore held under a certain mechanical prestress between the bottom of the battery cells 8 and the slope 36 of the forming portion 32, so that a sealing pressure directed in the z-direction is exerted on the sealing element 40. The sealing element 40 is preferably elastically or deformably compressible and is arranged so as to be at least partially displaceable along the slope 36 of the forming portion 32.

[0048] During normal operation, the (internal) pressure pHV in the high-voltage area 26 (high-voltage area pressure) and the (internal) pressure pG in the gas area 28 (gas area pressure) essentially correspond to an ambient pressure of the battery system 6. In other words, the high-voltage area pressure pHV and the gas area pressure pG are essentially the same, so that there is essentially no pressure difference or no pressure difference between the high-voltage area 26 and the gas area 28, or radially inside and radially outside of the sealing element 40.

[0049] The Fig. Figure 4 shows a fault in the battery cell 8, in which (for example, due to thermal runaway) the internal pressure of the battery cell 8 exceeds a predetermined value, and the degassing device 22 opens, so that a gas stream 24 flows in the degassing direction out of the cell housing 12, through the opening 30, and into the gas region 28. This leads to a pressure increase in the gas region 28, so that the gas region pressure pG becomes greater than the high-voltage region pressure pHV. As a result, the pressure increases radially on the inside of the sealing element 40, whereby the sealing element 40 is pushed radially outward from the opening 30 due to the degassing-induced pressure increase in the gas region 28. This is shown in the Fig. 4 is shown schematically by horizontal arrows 42. Subsequently, the sealing element 40 is pressed or displaced along the slope 36 into the successively narrowing gap between the battery cell 8 and the formed portion 32, so that an increasingly higher sealing pressure is generated to seal the high-voltage area 26.

[0050] The cell stack 12 is advantageously clamped or held in place such that the battery cells 8 are not lifted out of the receiving area 34 when the sealing element 40 is displaced. This ensures a reliable and operationally safe spatial and fluidic separation between the high-voltage area 26 and the gas area 28, even in the event of a thermal runaway of one or more battery cells 8.

[0051] In this embodiment, the opening 30 is designed essentially as an elongated hole extending along the X-direction, which is thus arranged along the stacking direction below the cell bottoms or degassing devices 22. As shown, for example, in the Fig. 5, the sealing element 40 encompasses all degassing devices 22 or openings of the battery cells 8 arranged in series.

[0052] The Fig. 6 shows a second embodiment of the battery system 6, in which the opening 30 is covered with a (vent) cover 44 to protect against external influences.

[0053] In the embodiment of the Fig. 7, the sealing element 40' is designed as an elastically compressible hose through which a coolant flows. The sealing element 40' is connected to a coolant circuit of the vehicle battery 4, in particular to coolant lines of the partition wall 18.

[0054] In the Fig. In the embodiment shown in Figure 8, the formed portion 32' does not have a receiving area 34. Furthermore, the slope 36' of the formed portion 32' is shortened, so that an enlarged support area for the battery cells 8 is provided on the floor of the intermediate wall 18. The slope 36' has a larger angle of inclination to the intermediate wall 18 compared to the slope 36. For example, the slope 36' has an acute angle of inclination of less than 45°, in particular approximately 30°. °

[0055] The Fig. 9 shows a further development of the above-described embodiment of the Fig.8, in which a cooling system 46 in the form of a coolant guide is arranged adjacent to the slope 36' on the gas region side. The cooling system 46 can alternatively be integrated into the intermediate wall 18. The cooling system 46 is arranged in particular in the flat support area radially outside the slope 36'.

[0056] The claimed invention is not limited to the exemplary embodiments described above. Rather, other variants of the invention can also be derived therefrom by those skilled in the art within the scope of the disclosed claims without departing from the subject matter of the claimed invention. In particular, all individual features described in connection with the various exemplary embodiments can also be combined in other ways within the scope of the disclosed claims without departing from the subject matter of the claimed invention. List of reference symbols 2 motor vehicles 4 vehicle battery 6 Battery system 8 battery cells 10 cell stacks 12 cell housings 14, 16 Battery terminal 18 Partition wall 20 battery cases 22 Degassing device 24 Gas flow 26 high-voltage range 28 Gas area 30 Opening 32, 32' forming 34 Recording area 36, 36' slope 38 edge collar 40, 40' sealing element 42 Arrow 44 Cover 46 Cooling x Vehicle longitudinal direction y vehicle transverse direction z Vehicle height direction pHV high-voltage range pressure pG gas range pressure QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This 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

[0000] DE 10 2009 046 385 A1

[0010] DE 10 2014 200 203 A1

[0011] DE 10 2020 125 651 A1

[0012]

Claims

[1] Battery system (6), comprising a battery system housing (20) and at least one electrochemical battery cell (8) accommodated therein, - wherein the battery cell (8) has a degassing device (22) with a defined degassing direction, - wherein the battery system housing (20) has a high-voltage region (26) and a gas region (28) which are separated from each other by an intermediate wall (18), - wherein an opening (30) connecting the high-voltage area (26) and the gas area (28) is introduced into the intermediate wall (18), - wherein the battery cell (8) is arranged in the high-voltage area (26) in such a way that the degassing direction is directed towards the opening (30), - wherein the intermediate wall (18) has a bead-like conical deformation (32, 32') which tapers obliquely in the degassing direction towards the opening (30), and - wherein a sealing element (40, 40') surrounding the opening (30) is arranged between the formed portion (32, 32') and the battery cell (8) in such a way that the sealing element (40, 40') is pressed radially outwards from the opening (30) and along a conical slope (36, 36') of the formed portion (32, 32') in the direction of the battery cell (8) in the event of a pressure increase in the gas region (28) due to degassing. [2] Battery system (6) according to claim 1, characterized by that the deformation (32, 32') has an edge collar (38) which delimits the opening (30) and is bent in the opposite direction to the degassing direction. [3] Battery system (6) according to claim 1 or 2, characterized by that the deformation (32, 32') has a receiving area (34) adjoining the slope (36) for holding the battery cell (8). [4] Battery system (6) according to one of claims 1 to 3, characterized by that the opening (30) is covered by a cover (44). [5] Battery system (6) according to one of claims 1 to 4, characterized by that the intermediate wall (18) is a cooling plate through which coolant can flow. [6] Battery system (6) according to one of claims 1 to 5, characterized by that the sealing element (40') is designed as a hose through which coolant can flow. [7] Battery system (6) according to claim 6, characterized by that the hose (40') is connected to the cooling plate (18). [8] Battery system (6) according to one of claims 1 to 7, characterized by that a cooling system (46) is arranged on the intermediate wall (18) in alignment with the battery cell (8). [9] Vehicle battery (4) for an electrically driven or drivable motor vehicle (2), comprising a battery system (6) according to one of claims 1 to 8. [10] Electrically driven or drivable motor vehicle (2), comprising a battery system (6) according to one of claims 1 to 9.

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