Bulkhead assembly for a battery housing, battery, and vehicle

Abstract

The present invention relates to a bulkhead assembly (1) for a battery housing (2), comprising a bulkhead (1a) located in a wall plane (WE) defined by a longitudinal direction (L) and a height direction (H) extending perpendicular to the longitudinal direction (L), at least one busbar housing (1b) and a busbar (1c) accommodated in the busbar housing (1b). The bulkhead assembly according to the invention is characterized in that the busbar housing (1b) is integrally formed with the bulkhead (1a).

Description

[Technical field]

[0001] The present invention relates to a bulkhead assembly for a battery housing as defined in detail in the preamble of claim 1, to a battery with a battery housing as defined in detail in the preamble of claim 7, and to a vehicle equipped with such a battery.

[0002] An electric vehicle battery for use in a vehicle, hereinafter referred to as the battery, typically includes a multi-part housing enclosing a battery interior space and a number of cell modules arranged in the battery interior space, each of which further includes a number of galvanic cells. The individual galvanic cells and the cell modules are interconnected in series and / or parallel in a predetermined manner to adjust the capacity of the battery and the voltage that the battery can output.

[0003] When a galvanic cell is damaged, it may ignite, which may result in the combustion of adjacent galvanic cells or even the entire cell module. The flame may also spread to adjacent cell modules, which may lead to the destruction of the entire battery. This phenomenon is also called thermal runaway or thermal propagation. To slow down this phenomenon, so-called partitions are arranged between the individual cell modules in the battery interior space. With such partitions, the individual cell modules can be thermally and electrically insulated from each other. This reduces the risk of a flame spreading in the battery interior space and reduces the ignition of the cell modules due to unacceptable heating caused by the hot fire gases rushing around.

[0004] To interconnect the cell modules, the conductors of the cell modules are connected by means of contact elements, also called busbars. To guide such busbars through the partitions, the partitions typically have a number of openings. However, these openings also allow gas and / or flame to pass through, thereby facilitating the ignition of cell modules adjacent to each other. To avoid short circuits or electric shocks, the busbars are arranged in busbar housings, which prevent direct contact with the busbars.

[0005] A battery further comprises many different components such as housing parts, screws, cell modules, current conductors, cooling components, power electronics, etc. Therefore, the manufacturing costs in producing a battery are correspondingly high.

[0006] From the patent document WO 2005 / 023301 a battery, a battery module for a battery and a busbar for a battery are known, where the busbar has an integrated protection function. Via the busbar, several galvanic cells can be interconnected in parallel, whereby each individual galvanic cell is connected to the busbar via a fuse. The fuse is made of a metal sheet, which is provided with two legs, for example by punching. The two legs thus form a spring element, which allows the galvanic cell to move relative to the busbar, whereby the individual galvanic cells are difficult to tear off from the busbar. If an individual galvanic cell is damaged, the current output by one galvanic cell can rise rapidly, which may damage other galvanic cells connected to the busbar. In this case, the fuse heats up, but only so strongly that the fuse melts and the defective galvanic cell separates from the busbar. [Patent Document 1] EP 3 282 501 A1

[0007] From DE 10 200 03 133 A1 a modular battery system is known with individually interconnected cell modules. A partition wall is arranged between the individual cell modules in each case, into which cell connectors are inserted. Guide means are connected to the partition walls, by means of which the cell modules can be simply aligned and positioned relative to one another. [Patent Document 2] US5,496,657 A

[0008] From DE 10 200 03 133 A1 a system for mounting electric energy modules is known. A number of cell modules are electrically conductively connected to one another by means of a respective connection block and a contact element inserted into the connection block. The cell modules can be arranged laterally next to one another or vertically stacked. The connection block can have a plate-like extension which extends between two cell modules and has cooling channels for guiding a cooling medium, so that heat can be removed from the cell modules. [Patent Document 3] US 2011 / 0302773 A1

[0009] From DE 10 2005 01 133 A1 an energy storage module is known with a module housing formed by a composite film. In this energy storage module, the composite film encloses each storage cell and forms individual storage pockets. The storage pockets are interconnected by a material bond to form the energy storage module. The composite film guides cell connectors at the respective contact areas between adjacent storage pockets for electrical contacting of the storage cells. [Patent Document 4] DE 10 2013 202 367 A1

[0010] From DE 10 200 03 133 A1 an arrangement for a battery is known. The battery comprises a battery housing with a partition wall formed by the battery housing itself, by means of which the interior space of the battery is divided into a number of chambers. One cell module is arranged in each chamber. Cell connectors are guided through or beyond the partition wall for electrical contact connection of adjacent cell modules. [Patent Document 5] US 2019 / 0288343 A1

[0011] From the patent document 6, a battery module and a battery pack are known. A plurality of battery cells are arranged in a row and are contact-connected to each other via electrically conductive connecting members. Holding structures are arranged between the battery cells, which enable simple and reliable mutual alignment and assembly of the battery cells. [Patent Document 6] DE 10 2017 216 005 A1

[0012] Furthermore, Patent Document 7 discloses a connector for a battery pack. The battery pack includes a battery housing with two chambers, in each of which a battery module with a plurality of battery cells is arranged. The chambers are bounded by walls that are integrally formed by the battery housing. The walls have openings through which a connector for electrically contacting and connecting the battery modules is guided. The connector itself includes a conductive core and a sleeve surrounding the core. The sleeve is shaped like an anchor plug to hold the connector firmly against the wall. [Patent Document 7] EP 3 496 179 A1 Summary of the Invention [Problem to be solved by the invention]

[0013] The problem on which the present invention is based is to provide an improved bulkhead assembly for a battery housing, which reduces the manufacturing costs of the battery and the required cycle time for interconnecting the cell modules during manufacture. [Means for solving the problem]

[0014] According to the invention, this problem is solved by a bulkhead module for a battery housing with the features of claim 1. Advantageous configurations and developments as well as a battery with such a bulkhead assembly and a vehicle with such a battery emerge from the claims dependent on this claim 1.

[0015] The partition assembly for a battery housing includes a partition located in a wall plane defined by a longitudinal direction and a height direction extending perpendicular to the longitudinal direction, the partition configured to divide the battery interior space enclosed by the battery housing into a plurality of mutually bounded chambers, and the partition assembly further includes at least one busbar housing and at least one busbar housed in the busbar housing, the busbar being guided through the partition perpendicular to the wall plane, the busbar housing being configured integrally with the partition. According to the invention, the partition is formed separately from the battery housing and configured to be connected to the battery housing. Furthermore, the partition has a sandwich structure in a direction perpendicular to the wall plane, in which a sandwich core contains a mineral material or is entirely made of a mineral material.

[0016] Due to the fact that the partition wall and the busbar housing are integrally formed, the partition wall assembly according to the invention can reduce the number of components required to interconnect the cell modules, which simplifies the manufacturing effort of the battery and shortens the manufacturing cycle time. That is, the busbars can be inserted into the partition wall, which is attached together with the busbars to the battery housing. It is no longer necessary to first assemble the busbars into the busbar housing, attach the partition wall to the battery housing and then guide the busbar housing together with the busbars through the partition wall. Furthermore, the partition wall assembly according to the invention has the secondary effect that it becomes difficult for mutually adjacent cell modules to burn in the event of a thermal runaway of the cell modules, which improves the safety of the battery in the event of a fire. This secondary effect is achieved by eliminating gaps due to openings between the busbar housing and the partition wall, which would otherwise allow flames and hot gases to penetrate through the gaps.

[0017] Generally, several busbars can also be accommodated in one partition wall. For example, two busbars can be guided through the partition wall at a distance from each other in the longitudinal direction. In this case, two or more cell modules can be contact-connected via the busbars.

[0018] For example, a mat of mineral material can be inserted into the hollow of the partition wall. The mineral material can increase the thermal resistance of the partition wall perpendicular to the wall plane, thereby reducing the heat flow from a cell module in a fire to an adjacent cell module. This further increases the safety of the battery in the event of a fire. Furthermore, since the mineral material is also non-conductive, this also improves the safety of the battery in the event of a short circuit.

[0019] In an advantageous development of the bulkhead assembly, the busbars are at least indirectly connected in the wall plane. , in a shape-fitting manner bulkhead above To PlacedThe busbar is in contact with the bulkhead, in particular in a fluid-tight manner. The smaller the gap between the busbar and the bulkhead, the more difficult it is for flame and gas to penetrate from a cell module in a flame to an adjacent cell module. In particular, if the busbar is in fluid-tight contact with the bulkhead, gas cannot penetrate between the busbar and the bulkhead. The busbar can be in direct contact with the bulkhead or there can be a compensation material between the busbar and the bulkhead. For example, the busbar can be at least partially surrounded by a heat-resistant shrink tube, which fills the gap between the busbar and the bulkhead in a fluid-tight manner.

[0020] According to a further advantageous configuration of the bulkhead assembly, the bulkhead assembly includes a protective cap device for each busbar, the protective cap device being connected to the bulkhead and JointlyThe protective cap arrangement surrounds each busbar and has a spacer which lies in the wall plane and is arranged on the protective cap arrangement in the height direction, with the spacer and the end face of the partition wall in the height direction being aligned flush with one another in the height direction. By providing the protective cap arrangement, the number of parts of the partition wall assembly is certainly increased. However, the number of parts of the partition wall assembly is still less than the number of parts of the busbar housings used previously, since the busbar housings used previously are also typically provided with protective caps. By providing the protective cap arrangement, curved busbars can be arranged on the partition wall. In order to insert such busbars, which are curved, for example, in a U-shape, the partition wall has a receiving portion at the end face which is open in the height direction. The U-shape makes it possible to compensate for positional tolerances as well as thermal expansion of the busbars. By means of the protective cap arrangement, this receiving portion can be closed, so that the passage of gas through the partition wall is minimized or even completely prevented. By means of the spacer, the gap between the partition wall and the battery housing can be bridged or closed, which improves the insulating effect of the partition wall assembly. The protective cap device can, for example, have a protective cap support with corresponding spacers as well as two protective caps, which can be formed integrally with the protective cap support, can be molded into the protective cap support, or can be attached to the protective cap support in other ways, for example by means of adhesive or screws.

[0021] In a further advantageous embodiment of the bulkhead assembly, it is further provided that the bulkhead comprises at least an electrically non-conductive material, in particular a plastic and / or a fiber-plastic composite, the bulkhead being preferably manufactured by injection moulding. Plastic is a relatively inexpensive electrically non-conductive material. In particular, by being manufactured as a fiber-plastic composite, the mechanical properties of the bulkhead can be improved, for example the stability and rigidity of the bulkhead can be increased. The use of plastic or a fiber-plastic composite allows for a production by injection moulding, whereby the bulkheads can be produced very cheaply and time-effectively, even in large numbers. For example, the bulkheads comprise PA6, GF35, thermosetting plastics and / or so-called sheet-molding-compounds (SMC).

[0022] In a further advantageous configuration of the bulkhead assembly, a tolerance compensation mat is arranged on the end face located in the height direction of the bulkhead, which extends in the longitudinal direction, in particular over the entire length of the bulkhead, and which extends above the busbars in the height direction. The tolerance compensation mat allows the positional tolerance between the bulkhead arranged in the battery housing and the battery housing to be compensated for, and thus closes any gaps that may arise. This makes it more difficult for a fire and / or gas to spread inside the battery. The tolerance compensation mat can extend over the entire length of the bulkhead or can only be partially placed on the end face of the bulkhead. It is also conceivable that the tolerance compensation mat is divided into several sections, for example into two, three or four sections. In particular, the positions at which the battery housing directly contacts the end face of the bulkhead are left free. For mounting, the tolerance compensation mat can be glued, for example, to the bulkhead. The tolerance compensation mat contains, for example, foamed plastic, rubber, silicone, etc.

[0023] According to the invention, a battery with a battery interior space enclosed by a battery housing includes at least one bulkhead assembly as described above arranged in the battery interior space. Due to the reduced number of parts of the bulkhead assembly according to the invention as opposed to providing a separate bulkhead and a busbar enclosed by a separate busbar housing, the cycle time of the manufacture of the battery according to the invention can be reduced, and thus the battery can be manufactured particularly quickly and cheaply.

[0024] In an advantageous development of the battery, the battery comprises at least two cell modules arranged in the battery interior space, with a partition assembly arranged between the two cell modules, such that the partition assembly divides the battery interior into two mutually bounded chambers, in particular two mutually gas-tightly bounded chambers, the two cell modules being electrically conductively contact-connected via a busbar. The partition assembly according to the invention not only makes it possible to reduce the manufacturing time of the battery, but also to improve the fire protection of the battery. With the partition assembly according to the invention, the cell modules arranged in the battery interior space can be bounded from one another, in which, in comparison with the partitions and busbar housings used up to now, any gaps that may arise are reduced to a minimum or even completely closed, in particular closed in a fluid-tight manner, which prevents or at least makes it difficult for flames and hot gases to penetrate from a thermally connected cell module to an adjacent cell module.

[0025] Advantageously, the battery housing has at least one safety valve for each chamber. For example, such a safety valve can be formed by a rupture disk. In case of thermal runaway of the cell modules, the gases escaping from the cell modules can lead to a pressure increase in the corresponding chamber in which each cell module is located. This creates a risk of bursting of the individual chambers or the battery housing itself. By providing a safety valve, pressure compensation can be performed and thus bursting of the chambers and / or the battery housing can be prevented. By means of the partition assembly according to the invention, the individual chambers can be bounded from each other in an airtight manner, which requires that at least one safety valve be provided for each chamber in order to protect the individual chambers also from impermissible internal pressures. The partition device and the battery housing are formed in such a way that a sufficient volume remains in each chamber in order to direct the gases escaping from the cell modules in the direction of the respective safety valve in a targeted manner. Individual chambers without safety valves can also be provided, which in this case are adjacent to at least one chamber provided with a safety valve in a fluid-flowing manner. In the event of thermal runaway in a cell module located in a chamber not provided with a safety valve, gas or vapor leaking from that cell module can be allowed to flow out of the battery housing through the safety valve of an adjacent chamber.

[0026] According to the invention, a vehicle comprises at least one battery as described above. The vehicle may be any vehicle, for example a passenger car, a truck, a transporter, a bus, etc. The vehicle may be driven exclusively by the battery's electricity or may be configured as a hybrid vehicle, in particular a plug-in hybrid vehicle. In case of a battery fire, due to the improved battery fire protection according to the invention, the vehicle occupants are given more time to move to a safe place. Modules adjacent to each other are more difficult to burn, which provides more time to take extinguishing measures.

[0027] Further advantageous configurations of the partition assembly according to the invention and of the battery according to the invention will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. [Brief description of the drawings]

[0028] [Figure 1] 1 shows an exploded view of a battery with a separator assembly known from the prior art; [Diagram 2] 2 shows a cross-sectional view of the battery shown in FIG. 1 at the mounting position of the busbar. [Diagram 3] 1 shows a perspective view of a bulkhead assembly according to the invention according to a first embodiment; [Figure 4] 1 illustrates an exploded view of a bulkhead assembly according to the present invention, according to an alternative embodiment. [Diagram 5] 1 shows a cross-sectional view of a battery with a bulkhead assembly according to the present invention at the busbar mounting position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] FIG. 1 shows an assembly situation of a partition 1a known from the prior art in a battery 5, for example an electric vehicle battery used in a vehicle. For the sake of clarity, only the lower part of the battery housing 2 is shown in FIG. 1. At least two cell modules 6 are arranged in the battery interior space enclosed by the battery housing 2, which are mutually bounded by a partition 1a. The partition 1a here extends between the cell modules 6 in a wall plane WE defined by a longitudinal direction L and a height direction H running perpendicular to the longitudinal direction L, and divides the battery interior space enclosed by the battery housing 2 into two chambers 7.1 and 7.2, which are shown in FIG. 2. At least one cell module 6 is arranged in each of the chambers 7.1 and 7.2 accordingly. The partition 1a is connected, for example, by a form-fit to a frame profile 10 protruding from the battery housing 2.

[0030] The partition 1a makes it difficult for flames and / or hot gases to spread between the two chambers 7.1, 7.2. A recess 8 is introduced into the partition 1a, through which a busbar 1c for contact-connecting the two cell modules 6 is guided in the orthogonal direction OR through the wall plane WE. The busbar 1c contains an electrically conductive material, for example copper. The busbar 1c has a number of openings, for example through holes, through which screws 9 for attaching the busbar 1c to the two cell modules 6 are guided. The busbar 1c is surrounded by a busbar housing 1b, which prevents undesired contact of the busbar 1c with components, or even with humans, which could result in a short circuit. The busbar housing 1b is provided in the upward height direction H with a protective cap arrangement 1d, which comprises a protective cap support 1d.1 and two protective caps 1.d2. To realize the screwing of the busbar 1c to the cell module 6, the protective cap 1.d2 can be opened.

[0031] The assembly of the battery is complicated due to the relatively large number of parts to be attached. Furthermore, if at least one cell module 6 catches fire, the flame and / or hot gases escaping from the cell module 6 can penetrate or penetrate through the recess 8, over the partition 1a and thus, for example, from the first chamber 7.1 to the second chamber 7.2. This increases the risk that adjacent cell modules 6 will also catch fire or at least be damaged.

[0032] Figure 2 shows again the mounting situation of the bulkhead 1a and the busbar 1c shown in Figure 1, including the busbar housing 1d, in a cross-section through the mounting position of the busbar 1c in the longitudinal direction L. Figure 2 shows arrows symbolizing the passage of gas and / or flame from the first chamber 7.1 to the second chamber 7.2 through an opening located between the bulkhead 1a and the busbar housing 1b.

[0033] 3 shows a perspective view of a bulkhead assembly 1 according to the present invention. Here, according to the present invention, the bulkhead 1a and the busbar housing 1b are integrally formed. This reduces the number of parts that need to be assembled when manufacturing the battery 5. This reduces the cycle time of the manufacturing, which leads to cost reduction.

[0034] Another advantageous secondary effect of the partition assembly 1 according to the invention is that the area of ​​the open part of the recess 8 can be reduced to a minimum dimension or other gaps between the partition 1a and the battery housing 2 can be closed. In a particularly advantageous embodiment, the partition assembly 1 according to the invention allows the two chambers 7.1 and 7.2 to be bounded gas-tight from one another, whereby a particularly high resistance to the spread of fire or the ingress of gases from the first chamber 7.1 to the second chamber 7.2 is achieved.

[0035] The bulkhead assembly 1 according to the invention may have one busbar 1c or may have several busbars 1c. Thus, the bulkhead 1a forms a busbar housing 1b for one or several busbars 1c. For example, as illustrated in FIG. 3, the bulkhead assembly 1 includes two busbars 1c. These two busbars 1c are spaced apart from each other in the longitudinal direction L with a distance Δl. Correspondingly, the bulkhead 1a has two openings for receiving and passing through the plate-shaped or strip-shaped busbars 1c in the orthogonal direction OR. Here, the busbars 1c may directly or indirectly contact the bulkhead 1a. For example, the busbars 1c may be at least partially covered with a shrink tube 11. The shrink tube 11 allows a gap that may occur between the bulkhead 1a and the busbars 1c to be closed in a fluid-tight manner. Furthermore, a tolerance compensation mat 4 may be arranged on the bulkhead 1a in the height direction H. The tolerance compensation mat 4 will be discussed again below.

[0036] FIG. 4 shows an advantageous configuration of a bulkhead assembly 1 according to the invention, which also allows the accommodation of curved busbars 1c as shown in FIGS. 1, 2, 4 and 5. Such busbars 1c have a substantially U-shaped profile with two extensions located in one plane for the contact connection of the busbars 1c with the cell modules 6. This curvature makes it possible, for example, to compensate for relative movements between the cell modules 6 as well as thermal expansion. In the embodiment of the bulkhead assembly 1 shown in FIG. 4, the busbars 1c are inserted into an accommodation space 12 provided in the bulkhead 1a so as to be accommodated through the bulkhead 1a as viewed in the height direction H, and this accommodation space 12 is closed by a protective cap arrangement 1d. Here again, the protective cap arrangement 1d comprises a protective cap support 1d.1 and two protective caps 1d.2. Here, the busbars 1c are preferably in indirect, fluid-tight contact with the bulkhead 1a and the protective cap arrangement 1d in the wall plane WE via a shrink tube 11.

[0037] In order to compensate for the distance between the upper end or upper surface of the protective cap arrangement 1d and the end surface S of the partition wall 1a, as viewed in the height direction H, the protective cap arrangement 1d has a spacer 1d.3 according to the invention. The spacer 1d.3 fills the space remaining between the protective cap support 1d.1 and the battery housing 2. This can also be seen from Fig. 5. In particular, the spacer 1d.3 has such an extension in the height direction H so that the spacer 1d.3 is flush with the end surface S of the partition wall 1a as viewed in the height direction H.

[0038] Particularly preferably, a tolerance compensation mat 4 is arranged on the end face S of the partition 1a over the entire length of the partition 1a in the longitudinal direction L. The tolerance compensation mat 4 contains, for example, foamed plastic, rubber, silicone, etc. and supports the mutual gas-tight demarcation of the two chambers 7.1 and 7.2. By means of the tolerance compensation mat 4, any gaps that may occur between the battery housing 2 and the partition 1a or the spacer 1d.3 can be closed.

[0039] The partition 1a has a sandwich structure in the orthogonal direction OR, in which a sandwich core 3 is inserted in the hollow of the partition 1a. The sandwich core 3 contains a mineral material or consists entirely of a mineral material. The mineral material has the advantage that it does not conduct electricity and further increases the thermal resistance of the partition 1a in the orthogonal direction OR. This reduces the risk of thermal damage to the components of two adjacent cell modules 6 in the event of a thermal runaway in one of the two cell modules 6. The partition 1a as well as the protective cap device 1d preferably contain a non-conductive material, for example a plastic. Suitable plastics are, for example, PA6, GF35 or any thermosetting plastic or a so-called sheet-molding compound, i.e. a fiber-plastic composite. The partition 1a as well as the protective cap device 1d can preferably be produced by injection molding, which allows a particularly inexpensive and fast production of the corresponding components.

[0040] To attach the protective cap device 1d to the bulkhead 1a, the protective cap device 1d can for example be clipped onto the bulkhead 1a.

[0041] Figure 5 shows again the embodiment of the bulkhead assembly 1 according to the invention shown in Figure 4 in a cross-sectional view in the longitudinal direction L at the height of the mounting position of the busbar 1c. Comparing Figure 5 with Figure 2, it can be seen that the open openings or gaps between the bulkhead 1a and the battery housing 2, and between the busbar 1c and the bulkhead 1a or the protective cap arrangement 1d, are closed, which makes it possible to prevent possible flames and / or gases from spreading beyond the chambers 7.1 and 7.2. In Figure 5, the protective cap 1d.2 is not shown.

[0042] To prevent rupture of one of the chambers 7.1, 7.2 in the event of thermal runaway of the cell module 6, the battery housing 2 may preferably have at least one safety valve (not shown) for each chamber 7.1, 7.2. Such a safety valve may for example be a rupture disk.

Claims

1. A bulkhead assembly (1) for a battery housing (2), comprising: a partition wall (1a) located in a wall plane (WE) defined by a longitudinal direction (L) and a height direction (H) extending perpendicular to the longitudinal direction (L) and dividing an internal space of the battery enclosed by the battery housing (2) into mutually bounded chambers (7.1, 7.2); At least one busbar housing (1b); a busbar (1c) accommodated in said busbar housing (1b) and guided perpendicular to said wall plane (WE); a protective cap device (1d) for said busbar (1c); In the bulkhead assembly (1), the bus bar housing (1b) is integrally formed with the partition wall (1a), and the bus bar housing (1b) and the protective cap device (1d) together enclose the bus bar (1c); The partition wall (1a) is formed separately from the battery housing (2) and is configured to be connected to the battery housing (2); The partition wall assembly (1), characterized in that the partition wall (1a) has a sandwich structure in a direction (OR) perpendicular to the wall plane (WE) and the sandwich core (3) contains mineral material or consists entirely of mineral material.

2. 2. The bulkhead assembly (1) according to claim 1, characterized in that the busbar (1c) rests on the bulkhead (1a) in a form-fitting manner at least indirectly in the wall plane (WE).

3. A partition assembly (1) as described in claim 1 or 2, comprising a spacer (1d.3) located in the wall plane (WE) and arranged in the protective cap device (1d) in the height direction (H), wherein the spacer (1d.3) and an end face (S) of the partition (1a) in the height direction (H) are aligned flush with each other in the height direction (H).

4. 3. The bulkhead assembly (1) according to claim 1 or 2, characterized in that the bulkhead (1a) contains at least a non-conductive material, and that the bulkhead (1a) is manufactured by injection molding.

5. A partition assembly (1) as described in claim 1 or 2, characterized in that a tolerance compensation mat (4) is arranged on an end surface (S) of the partition (1a) located in the height direction (H) and extends consistently throughout the entire length of the partition (1a) in the longitudinal direction (L), and the tolerance compensation mat (4) extends above the busbar (1c) when viewed in the height direction (H).

6. A battery (5) having an internal battery space surrounded by a battery housing (2), The battery (5), characterized by a bulkhead assembly (1) according to claim 1 or 2 arranged in the battery interior space.

7. 7. The battery (5) according to claim 6, characterized by at least two cell modules (6) arranged in the battery interior space, the partition assembly (1) being arranged between the two cell modules (6) such that the partition assembly (1) divides the battery interior space into two mutually bounded chambers (7.1, 7.2), the two cell modules (6) being conductively contact-connected via the busbar (1c).

8. 8. Battery (5) according to claim 7, characterized in that the battery housing (2) comprises at least one safety valve for each of the chambers (7.1, 7.2).

9. A vehicle, characterised in that it comprises at least one battery (5) according to claim 6.

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