Wall assembly for battery pack for vehicle, battery pack for vehicle and vehicle

Abstract

The present disclosure relates to a wall assembly (34) for a battery pack (12) of a vehicle. The wall assembly (34) includes a carrier plate (14) and a protective sheet (16) connected to the carrier plate (14). In addition, the protective sheet (16) is thermally coupled to the carrier plate (14) via a surface region of the carrier plate (14). In addition, the protective sheet (16) covers a portion of the carrier plate (14). A battery pack (12) for a vehicle is also provided. The battery pack (12) includes a housing (36) including at least one wall assembly (34). Further, the battery pack (12) includes a plurality of battery cells (18) arranged inside the housing (36). Furthermore, each battery cell (18) comprises a vent valve. The exhaust valve faces a protective sheet (16) of the wall assembly (34). The invention further relates to a vehicle having such a battery pack (12).

Description

Technical Field

[0001] The present disclosure relates to a wall assembly for a battery pack of a vehicle.

[0002] The present disclosure also relates to a battery pack for a vehicle. The battery pack includes a housing and a plurality of battery cells disposed inside the housing.

[0003] Furthermore, the present disclosure relates to a vehicle including the battery pack. Background Art

[0004] A battery electric vehicle or a hybrid electric vehicle may include a battery pack configured to provide electrical energy for driving the vehicle. Such a battery pack may be referred to as a traction battery pack.

[0005] In this context, the electrical storage capacity of the battery pack is a major factor affecting the driving range of the associated vehicle. Therefore, a long driving range requires a large electrical storage capacity, which results in a relatively large geometric size of the battery pack. However, the interior space of the vehicle is limited, such that the geometric size of the battery pack cannot be increased arbitrarily. Thus, when it is desired to increase the driving range and only a given space is available for the battery pack, it is necessary to increase the energy density of the battery pack. At the same time, it is necessary to ensure the operational safety of the battery pack. Summary of the Invention

[0006] Accordingly, it is an object of the present disclosure to improve battery packs for vehicles such that they are well adapted to the above challenges. This means that the improved battery packs should be compact, suitable for high energy density, and should meet high operational safety standards.

[0007] The problem is solved or alleviated at least in part by the subject matter of the independent claims of the present disclosure, with further examples incorporated in the dependent claims.

[0008] According to a first aspect, there is provided a wall assembly for a battery pack of a vehicle. The wall assembly includes a carrier plate and a protective sheet connected to the carrier plate. The protective sheet is thermally coupled to the carrier plate via a surface area of the carrier plate. Additionally, the protective sheet covers a portion of the carrier plate. In this context, the battery pack can be understood as a traction battery pack of a vehicle. An alternative term for the carrier plate is a substrate. The fact that the protective sheet covers a portion of the carrier plate means that the surface of the carrier plate on which the protective sheet is provided is covered by less than 100%. The protective sheet serves as local protection for the carrier plate, for example against mechanical strain such as impacts of particles acting on the protective sheet. The purpose of the fact that the protective sheet only covers a portion of the carrier plate is to reduce the amount of additional material required for the protective sheet in the battery pack. Thereby, the size and weight of the battery pack are reduced. The thermal coupling between the protective sheet and the carrier plate has the effect that the heat energy can be dissipated using the carrier plate. Therefore, such a protective sheet does not need to be configured to dissipate the heat that occurs during the operation or failure of the battery pack. This also helps to reduce the amount of material required for the protective sheet. The wall assembly according to the present disclosure provides a high level of safety, for example in the case of a thermal event in the battery pack. In such an event, a hot gas containing abrasive particles is ejected from one or more battery cells that have undergone the thermal event. In this case, the protective sheet serves as ballistic protection against the abrasive particles. At the same time, due to the thermal coupling between the protective sheet and the carrier plate, the heat energy of the hot gas can be dissipated in the carrier plate, where the heat energy can be quickly and effectively spread over a large surface area and mass.

[0009] According to an example, the protective sheet and the carrier plate can be mechanically connected. According to an example, the mechanical connection is achieved by roll bonding. In another example, the protective sheet can be cast into the carrier plate. According to another example, the protective sheet and the carrier plate can be mechanically connected using threaded fasteners, rivets, and / or other suitable connecting devices. Additionally or alternatively, the protective sheet can be adhesively connected to the carrier plate (e.g., by an adhesive). In this context, a thermal interface material can be used to enhance the thermal coupling between the protective sheet and the carrier plate. Further additionally or alternatively, the protective sheet can be held in place by other components of the battery pack. Such components can be, for example, busbars or similar parts for electrically connecting the battery cells of the battery pack to each other and / or for connecting the battery pack to a load or a charging system.

[0010] According to an example, the protective sheet and the carrier plate are electrically insulated from each other. Therefore, contact corrosion between the protective sheet and the carrier plate can be reduced and / or eliminated.

[0011] According to the example, the wear resistance of the protective sheet is higher than that of the carrier plate. This further enhances the protective effect of the protective sheet against abrasive substances (such as particles released from a battery cell undergoing a thermal event). This allows for the selection of a material for the carrier plate that has a relatively low wear resistance but is otherwise a high-performance material, for example, a lightweight, high thermal conductivity material. In summary, a relatively long service life of the wall assembly is ensured. This can result in a long service life of the associated battery pack.

[0012] According to the example, the density of the protective sheet is higher than that of the carrier plate. Additionally or alternatively, the hardness of the protective sheet is higher than that of the carrier plate. Further additionally or alternatively, the tensile strength of the protective sheet is higher than that of the carrier plate. These properties have the effect of increasing the wear resistance of the protective sheet compared to that of the carrier plate. Thus, the wall assembly can withstand mechanical impacts, such as abrasive particles. At the same time, a material with a relatively low wear resistance but otherwise high performance can be selected for the carrier plate. In summary, the robustness of the wall assembly against undesired thermal events and / or mechanical events is enhanced. This can result in a relatively long service life of the wall assembly. Therefore, a long service life of the associated battery pack can be achieved.

[0013] According to the example, the thermal conductivity of the carrier plate is higher than that of the protective sheet. This enables effective heat dissipation away from the protective sheet and away from the battery cell of the battery pack using the wall assembly. In other words, the carrier plate can act as a heat sink. Additionally, overheating of the protective sheet can be prevented.

[0014] According to the example, the carrier plate includes a metallic material. Additionally or alternatively, the protective sheet includes a metallic material. Metallic materials provide good mechanical stability and heat conduction properties. Moreover, the carrier plate and / or the protective sheet made of metallic materials can be produced using mature production techniques. Therefore, production can be cost-effective.

[0015] According to the example, the carrier plate includes an aluminum material. Additionally or alternatively, the protective sheet includes a steel material. The aluminum material is characterized by a low density, which may result in a low weight of the wall assembly. Additionally, the aluminum material has favorable heat conduction properties, i.e., the aluminum material is a good heat conductor. Therefore, the aluminum material is well-suited for transferring and dissipating heat, thereby preventing overheating of the wall assembly and the battery pack in which the wall assembly is used. The steel material is characterized by a relatively high density, tensile strength, and hardness, which can result in a robust wall assembly with high structural integrity. This has the effect that the protective sheet can withstand mechanical and / or chemical strains that may occur during a failure of the battery cell (e.g., during a thermal event). Additionally, due to the relatively high melting point of the steel material, the protective sheet including the steel material can withstand high thermal shocks. In this way, the carrier plate is reliably protected against mechanical, chemical, and / or thermal strains.

[0016] According to an example, the wall assembly of the present disclosure includes at least two protective sheets. Each protective sheet is connected to the carrier plate. In addition, each of the protective sheets contacts a surface area of the carrier plate such that each of the protective sheets is thermally coupled to the carrier plate via the associated surface area. Additionally, each of the protective sheets covers a portion of the carrier plate. Thus, the at least two protective sheets are arranged on the carrier plate at different positions. These positions may coincide with positions that are at risk of experiencing high mechanical strain or high mechanical shock (e.g., from particles). In short, by providing at least two protective sheets, the carrier plate is protected when needed. The positions to be protected are generated, for example, by the arrangement of the battery cells of the battery pack in which the wall assembly is used. In the example, each protective sheet can protect the carrier plate from potential ejection of high-temperature substances from one or a group of battery cells. Since each of the protective sheets covers a portion of the surface area of the carrier plate, a relatively small amount of material for the protective sheets can be used. Thus, a low weight and a compact size of the wall assembly can be achieved.

[0017] According to another example, the wall assembly of the present disclosure optionally includes more than two protective sheets. As previously mentioned, the number of protective sheets can correspond to the number of positions on the carrier plate that need to be protected.

[0018] According to an example, the protective sheets are arranged in a regular pattern. The protective sheets arranged in a regular pattern are arranged, for example, such that adjacent protective sheets have a constant center distance. In another example, the distance between adjacent protective sheets is constant. Additionally or alternatively, the protective sheets can be arranged in parallel or at any other predetermined angle. The regular pattern of the protective sheets can correspond to the regular pattern of the elements of the battery cells of the battery pack in which the wall assembly is used. In this case, the battery cells can be arranged in two or more rows, and each of the at least two protective sheets can be associated with a row of battery cells. In this case, the exhaust valves of the battery cells can be arranged in two or more rows, and each of the at least two protective sheets can be arranged opposite a row of exhaust valves. This has the effect that the carrier plate is reliably protected from the ejected substances from each row of battery cells (more precisely, from the exhaust valves). Arranging the protective sheets in a regular pattern can also result in an easier and more efficient assembly process for the wall assembly.

[0019] According to an example, the thickness of the carrier plate exceeds the thickness of the protective sheet. The thickness of the protective sheet is preferably 5% to 10% of the thickness of the carrier plate. This has the effect that the thermal energy only has to travel a relatively short distance (i.e., the thickness of the protective sheet) to reach the carrier plate. This is beneficial for heat dissipation. Additionally, the relatively high thickness of the carrier plate is also beneficial for heat conduction. This can prevent possible overheating of the wall assembly and, for example, the battery pack. Moreover, the relatively low thickness of the protective sheet has the effect of requiring a relatively small amount of material for the protective sheet. This reduces the size and weight of the wall assembly. Additionally, the material cost of the protective sheet is relatively small.

[0020] According to a second aspect, a battery pack for a vehicle is provided. The battery pack includes a housing. The housing includes at least one wall assembly according to the present disclosure. The battery pack further includes a plurality of battery cells disposed inside the housing. Each battery cell includes an exhaust valve. Additionally, the exhaust valve faces a protective sheet of the wall assembly. In this context, the wall assembly can form a part of the housing of the battery pack. According to an example, the battery cells are stacked along a stacking direction. Thereby, one or more "piles" or stacks of battery cells are formed. The exhaust valve is a valve configured to release gas and / or particles from the battery cell in the case of a thermal event. According to an example, all the exhaust valves are oriented in the same direction. Thus, the exhaust valves enable the gas to be released in a target direction inside the housing of the battery pack. When a battery cell undergoes a thermal event, it can eject high-temperature gas and / or particles through its exhaust valve. The fact that the exhaust valve faces the protective sheet results in the effect that high-temperature substances are splashed on the protective sheet in the case of a thermal event. Thereby, the carrier plate is protected from high-temperature substances. Accordingly, the housing of the battery pack can be protected from high-temperature substances and / or abrasive substances. The housing can serve as a structural component for supporting the battery cells. Such a housing provides good heat conduction performance and high resilience against abrasive substances and / or high resilience against mechanical loads. This enhances the robustness of the battery pack against thermal events and / or mechanical events, and thus enhances the service life of the battery pack. Additionally, due to the above-mentioned compactness of the wall assembly, the battery pack can also be compact and have a relatively low weight. The compactness of the wall assembly also enables a high electrical capacity of the battery pack, since the space not required by the wall assembly can be used for additional battery cells. Moreover, the wall assembly provides the possibility of using cell chemistry while occupying a relatively small space, which results in a high electrical storage capacity. This is due to the fact that the wall assembly according to the present disclosure ensures compliance with high safety standards.

[0021] According to an example, the protective sheet defines a gas channel. Such a gas channel can direct the gas and / or particles released from the battery cell towards the discharge port of the battery pack. This may be the case after a thermal event. Additionally, since the gas and / or particles released from the battery cell are directed to the discharge port of the battery pack, the pressure generated by the particles and gas in the battery cell is reduced, and excessive impact of abrasive particles on the housing of the battery pack can be avoided. Accordingly, the safety and stability of the battery cell can be enhanced, and thus the safety and stability of the battery pack can be enhanced.

[0022] According to the example, the wall assembly forms the bottom wall or the top wall of the battery pack. Generally, there are different ways to position the battery cells inside the battery pack of a vehicle. The battery cells can be positioned into the battery pack of the vehicle from the bottom up or from the bottom down, where the bottom of the battery cell should be understood as the side opposite to the side where the electrical connection terminals are provided. In either case, the abrasive material ejected through the exhaust valve is splashed onto the protective sheet. Thus, reliable protection of the housing of the battery pack is maintained. In addition, the assembly process of the battery pack is facilitated and thus the cost can be reduced.

[0023] It should be understood that in the example, the battery cells can also be partially or completely inserted into the housing of the battery pack, where the exhaust valves of the battery cells face the side wall of the housing of the battery pack. In this case, the protective sheet and the wall assembly therewith can form the side wall of the battery pack. This has the effect that in this case, the abrasive material ejected through the exhaust valve is also splashed onto the protective sheet. Thus, reliable protection of the housing of the battery pack is maintained.

[0024] According to the example, at least a part of the battery cell is mechanically coupled to the wall assembly. The term "mechanically coupled" means that at least a part of the battery cell is connected to the wall assembly such that force and / or torque can be transmitted between the respective battery cell and the wall assembly. In this way, the movement of the battery cell having the exhaust valve relative to the wall assembly may be hindered or blocked. Thus, the exhaust valve remains aligned with the protective sheet. In other words, the exhaust valve remains facing the protective sheet of the wall assembly. It is desirable to keep the exhaust valve of the battery cell aligned with the protective sheet because the protective sheet only covers a part of the housing of the battery pack. In this way, it is ensured that the abrasive material ejected through the exhaust valve is always splashed onto the protective sheet. Thus, reliable protection of the carrier plate and / or the housing of the battery pack is maintained. In addition, if at least a part of the battery cell is mechanically coupled to the wall assembly, the battery cell can be used to provide mechanical stability to the housing. In this case, the battery cell can be used to carry a shear load. In other words, by mechanically coupling the battery cell to the wall assembly, a "shear plane" can be formed, where the battery cell is used to absorb or carry the shear load. Thus, the structural integrity of the battery pack and its resilience against mechanical loads can be enhanced. Since the battery cell is used to carry mechanical loads, the size and / or weight of the housing can be reduced. Thus, the size and / or weight of the battery pack is relatively small.

[0025] According to the example, the wall assembly is a structural component of a vehicle. This means that part of the housing of the battery pack including the wall assembly or the entire housing of the battery pack is a structural component of the vehicle. In other words, the battery pack of the vehicle is a structural battery pack. In this case, the housing of the battery pack of the vehicle contributes to the structural function of the vehicle chassis. In other words, the wall assembly is configured to carry loads that are typically carried by the chassis of the vehicle. This may be the case in any driving situation, including a collision event. Since the ability of the housing of the battery pack contributes to the structural function of the vehicle chassis, the chassis itself can be constructed in a weight - reducing and efficient manner. In other words, redundant structural components in the vehicle can be avoided. In the case where the wall assembly is a structural component of the vehicle, it is particularly important that when any one of the battery cells undergoes a thermal event, the protective sheet protects the carrier plate from the abrasive impact of any substances ejected from the battery cell. This is because the abrasive impact on the carrier plate may deteriorate the structural performance of the carrier plate and, in turn, deteriorate the housing of the battery pack. In addition, the wall assembly supports the battery pack while providing improved heat conduction and / or resilience against abrasive substances originating from the battery cells. In summary, the wall assembly reduces the total weight of the vehicle and has the effect of enhancing the safety of the vehicle.

[0026] According to a third aspect, a vehicle is provided, wherein the vehicle includes a battery pack according to the present disclosure. Due to the fact that the battery pack is compact, lightweight and can operate according to high safety standards, the battery pack consumes relatively little space in the vehicle and contributes relatively little weight to the total weight of the vehicle. In addition, the vehicle as a whole can operate according to high safety standards. This provides the possibility of using a battery pack with a high energy density (i.e., having a high electrical storage capacity while still being relatively compact) in the vehicle. Thereby, a larger driving range of the vehicle can be ensured.

[0027] It should be noted that the above examples can be combined with each other regardless of the aspects involved.

[0028] With reference to the examples described below, these and other aspects of the present disclosure will become apparent and be elucidated. Description of the Drawings

[0029] Examples of the present disclosure will be described below with reference to the following drawings.

[0030] Figure 1 A vehicle including a battery pack according to the present disclosure is shown, the battery pack having a wall assembly according to the present disclosure,

[0031] Figure 2 shown in a separate perspective view Figure 1 of the wall assembly and Figure 1 multiple battery cells of the battery pack of the vehicle, wherein the wall assembly is partially represented in a transparent manner,

[0032] Figure 3 shows a cross-section along plane III of the battery pack Figure 2 , and

[0033] Figure 4 shows the wall assembly of the battery pack Figure 2 in a separate view. DETAILED DESCRIPTION

[0034] The drawings are only schematic representations and are only used to illustrate examples of the present disclosure. Identical or equivalent elements are in principle provided with the same reference signs.

[0035] Figure 1 An electric vehicle 10 is shown, which will hereinafter be referred to simply as vehicle 10.

[0036] Vehicle 10 includes a battery pack 12, and battery pack 12 includes a plurality of battery cells 18 arranged in a housing 36. For reasons of better visibility, only some of the battery cells 18 are provided with reference signs.

[0037] In the present example, battery pack 12 is a traction battery, i.e., battery pack 12 is used to drive vehicle 10.

[0038] Furthermore, in the present example, battery pack 12 is a so-called structural battery. This means that at least some components of battery pack 12 serve as structural components of parts forming the chassis of vehicle 10. Thus, the mechanical stiffness of the chassis is partly provided by battery pack 12. In other words, forces and torques acting on the chassis during driving, for example, can be borne at least partly by components of battery pack 12. This enables a lightweight construction of the vehicle chassis.

[0039] Figure 2 The wall assembly 34 and the plurality of battery cells 18 of battery pack 12 are shown in more detail.

[0040] In the present case, wall assembly 34 forms the top wall of housing 36 of battery pack 12. The side walls and the bottom wall of housing 36 are not shown Figure 2 herein.

[0041] Wall assembly 34 includes a carrier plate 14 and a total of four protection sheets 16. For reasons of better visibility, carrier plate 14 is represented in a transparent manner.

[0042] In the present example, the battery cells 18 of battery pack 12 are arranged in four parallel rows of stacked battery cells 18. Furthermore, the battery cells 18 of adjacent rows are adjacent to each other in a direction perpendicular to the stacking direction of the rows. For reasons of better visibility, the rows are not completely filled with battery cells 18.

[0043] With respect to the wall assembly 34, the protective sheet 16 is connected to the carrier plate 14, for example, by using an adhesive. In addition, the protective sheet 16 is thermally coupled to the carrier plate 14 via the surface area of the carrier plate 14. This means that heat can be transferred between the protective sheet 16 and the carrier plate 14, with a relatively low resistance opposing this heat transfer.

[0044] In addition, each of the protective sheets 16 only covers a part of the carrier plate 14 (see also Figure 4 ).

[0045] Four protective sheets 16 are arranged in a regular pattern. In this example, this means that the four protective sheets 16 extend parallel to each other. In addition, the protective sheets 16 are arranged such that the center distance 20 between adjacent protective sheets 16 is constant.

[0046] Furthermore, each of the protective sheets 16 is aligned with one of the four rows of stacked battery cells 18. More precisely, each protective sheet is centered with respect to the associated row of battery cells in a direction perpendicular to the stacking direction. Since the geometry of each battery cell 18 is the same and the vent valve 26 is provided centrally on each battery cell 18, the vent valves 26 of each row of battery cells 18 are arranged opposite the associated protective sheet 16 (see also Figure 3 ).

[0047] The vent valve 26 is arranged on the same side as the electrical connection terminal 30 of the battery cell 18.

[0048] Figure 3 More details of one of the battery cells 18 and the wall assembly 34 are shown.

[0049] The wall assembly 34 and the battery cell 18 are mechanically coupled using a connecting element 24. The connecting element is arranged between the battery cell 18 and the wall assembly 34.

[0050] In addition to the mechanical coupling, the connecting element 24 defines a gap between the battery cell 18 and the wall assembly 34 such that the vent valve 26 is spaced apart from the wall assembly 34.

[0051] Thus, a gas channel 38 is formed, which is bounded by the side of the battery cell 18 including the vent valve 26, the connecting element 24, and the wall assembly 34 (more precisely, the protective sheet 16).

[0052] In Figure 3 the case where a battery cell 18 experiences a thermal event such as thermal runaway, heat, gas, and / or particles can be released from the battery cell 18 via the vent valve 26. Heat, gas, and / or particles can be simply referred to as high-temperature substances and / or abrasive substances 28, which are indicated by the Figure 3 arrows in

[0053] The high-temperature material and / or the abrasive material 28 is splashed onto the protective sheet 16. The protective sheet 16 prevents the high-temperature material and the abrasive material 28 from contacting the carrier plate 14, and thus prevents mechanical damage to the carrier plate 14.

[0054] The high-temperature material and / or the abrasive material 28 can be guided away from the battery cell 18 through the gas passage 38. At the same time, heat can be absorbed by the carrier plate 14 through the protective sheet 16. Since the carrier plate 14 is made of aluminum and has a certain thickness, the heat can be dissipated in the carrier plate 14, thereby protecting the adjacent battery cells 18 and / or the electrical connection devices 32 (such as busbars) of the battery pack from excessive heat exposure.

[0055] The mechanical coupling between the battery cell 18 and the wall assembly 34 further facilitates maintaining the defined orientation and positioning of the exhaust valve 26 of the battery cell 18 relative to the protective sheet 16 of the wall assembly 34.

[0056] It should also be noted that in this example, the protective sheet 16 is made of a steel material, and the carrier plate 14 is made of an aluminum material.

[0057] Therefore, the wear resistance of the protective sheet 16 is higher than that of the carrier plate 14. Thus, the protective sheet 16 is used to protect the carrier plate 14 from the high-temperature and abrasive material 28.

[0058] More specifically, the higher wear resistance of the protective sheet 16 is due to the fact that the steel material has a higher density, higher hardness, and higher tensile strength than the aluminum material of the carrier plate 14.

[0059] In addition, the thermal conductivity of the carrier plate 14 is particularly high, that is, higher than that of the protective sheet 16. This allows the heat from the high-temperature material and the abrasive material 28 to quickly spread through the carrier plate. In other words, the carrier plate 14 serves as a heat sink.

[0060] As used herein, the phrase "at least one" with respect to a list of one or more entities should be understood to mean at least one entity selected from any one or more of the entities in the list of entities, but not necessarily including at least one of each of the specifically listed entities within the list of entities, and not excluding any combination of entities in the list of entities. This definition also allows that entities other than those specifically identified within the list of entities referred to by the phrase "at least one" may optionally exist, whether related or unrelated to those specifically identified. Thus, as a non-limiting example, "at least one of A and B" (or equivalently, "at least one of A or B", or equivalently, "at least one of A and / or B") may in one example refer to at least one A, optionally including more than one A, without B (and optionally including entities other than B); in another example, to at least one B, optionally including more than one B, without A (and optionally including entities other than A); in yet another example, to at least one A, optionally including more than one A, and at least one B, optionally including more than one B (and optionally including other entities). In other words, the phrases "at least one", "one or more", and "and / or" are open-ended expressions that are both conjunctive and disjunctive in operation. For example, each of the expressions "at least one of A, B, and C", "at least one of A, B, or C", "one or more of A, B, and C", "one or more of A, B, or C", and "A, B, and / or C" may represent A alone, B alone, C alone, A and B together, A and C together, B and C together, A, B, and C together, and optionally any combination of any of the foregoing with at least one other entity.

[0061] By studying the drawings, the disclosure, and the appended claims, those skilled in the art can understand and implement other variations of the disclosed examples when practicing the claimed disclosure. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single processor or other unit may implement the functions of several items or steps recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used advantageously. A computer program may be stored / distributed on a suitable medium, such as an optical storage medium or a solid-state medium provided together with or as part of other hardware, but may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems. Any reference signs in the claims should not be construed as limiting the scope of the claims.

[0062] List of reference signs

[0063] 10 Vehicle

[0064] 12 Battery pack

[0065] 14 Carrier plate

[0066] 16 Protective sheet

[0067] 18 Battery cell

[0068] 20 Center distance

[0069] 22 Bottom wall

[0070] 24 Connecting element

[0071] 26 Exhaust valve

[0072] 28 High-temperature substance and / or abrasive substance

[0073] 30 Electrical connection terminal

[0074] 32 Electrical connection device

[0075] 34 Wall assembly

[0076] 36 Housing

[0077] 38 Gas passage

[0078] 40 Top wall

Claims

1. A wall assembly (34) for a battery pack (12) of a vehicle (10), the wall assembly (34) comprising a carrier plate (14) and a protective sheet (16) connected to the carrier plate (14), wherein the protective sheet (16) is thermally coupled to the carrier plate (14) via a surface area of ​​the carrier plate (14), and wherein the protective sheet (16) covers a portion of the carrier plate (14).

2. The wall assembly (34) according to claim 1, wherein the wear resistance of the protection sheet (16) is higher than the wear resistance of the carrier plate (14).

3. A wall assembly according to claim 2, wherein the density of the protective sheet (16) is higher than the density of the supporting plate (14), and / or wherein the hardness of the protective sheet (16) is higher than the hardness of the supporting plate (14), and / or wherein the tensile strength of the protective sheet (16) is higher than the tensile strength of the supporting plate (14).

4. The wall assembly (34) according to claim 1, wherein the thermal conductivity of the carrier plate (14) is higher than the thermal conductivity of the protection sheet (16).

5. The wall assembly (34) of claim 1, wherein the carrier plate (14) comprises a metal material, and / or wherein the protective sheet (16) comprises a metal material.

6. The wall assembly (34) according to claim 5, wherein the carrier plate (14) comprises an aluminum material, and / or wherein the protection sheet (16) comprises a steel material.

7. The wall assembly (34) according to claim 1 comprises at least two protective sheets (16), each protective sheet (16) being connected to the carrier plate (14), wherein each of the protective sheets (16) contacts a surface area of ​​the carrier plate (14) so ​​that each of the protective sheets (16) is thermally coupled to the carrier plate (14) via an associated surface area, and wherein each of the protective sheets (16) covers a portion of the carrier plate (14).

8. Wall assembly (34) according to claim 7, wherein the protective sheets (16) are arranged in a regular pattern.

9. The wall assembly (34) of claim 1, wherein a thickness of the carrier plate (14) exceeds a thickness of the protection sheet (16).

10. A battery pack (12) for a vehicle (10), comprising: A housing (36), wherein the housing (36) comprises at least one wall component (34) according to any one of the preceding claims, and a plurality of battery cells (18) disposed within the housing (36), wherein each of the battery cells (18) includes a vent valve (26), The exhaust valve (26) faces the protection sheet (16) of the wall assembly (34).

11. The battery pack (12) of claim 10, wherein the protective sheet (16) defines a gas channel (38).

12. The battery pack (12) according to claim 10 or 11, wherein the wall component (34) forms a bottom wall (22) or a top wall (40) of the battery pack (12).

13. The battery pack (12) of claim 10, wherein at least a portion of the battery cells (18) are mechanically coupled to the wall assembly (34).

14. The battery pack (12) of claim 10, wherein the wall assembly (34) is a structural component of the vehicle (10).

15. A vehicle (10) comprising a battery pack (12) according to any one of claims 10 to 14.

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