Battery housing, insulator device for battery housing and use thereof

Abstract

An insulator device for a battery housing comprising at least one housing wall for enclosing an interior space receiving a battery cell arrangement, the insulator device comprising at least one first insulating layer arranged in the interior space between the battery cell arrangement and the housing wall, wherein the at least one first insulating layer is configured for electrical and thermal insulation of the battery cell arrangement.

Description

Technical Field

[0001] The invention relates to an insulator device for a battery housing, a battery housing comprising an insulator device according to the invention, and the use of an insulator device according to the invention in a battery housing of a motor vehicle battery. Background Art

[0002] Devices for thermally and / or electromagnetically insulating a vehicle battery arrangement from the environment are known from the prior art.

[0003] Prior art battery housings for traction batteries and drive batteries, respectively, of electric vehicles generally have at least two interconnected battery housing parts, which together form a battery housing for enclosing a receiving space for a battery and a battery cell arrangement, respectively. The known battery housing parts are generally made of a metallic material, mainly aluminium or steel. The battery housing parts and the battery housing, respectively, are capable of effectively insulating the environment of the battery housing parts from electromagnetic radiation of a traction battery arranged in the receiving space and also effectively insulating the traction battery from electromagnetic radiation originating from radiation sources in the environment of the traction battery, for example from the electric vehicle itself. The battery housing parts and the battery housing, respectively, made of metallic material, generally have the disadvantage that they are very heavy.

[0004] Document DE 10 2020 111 062 A1 describes providing an isolating element in the region of a plastic housing for receiving a battery, wherein the isolating element is provided with a conductive coating for electromagnetically isolating a battery cell received in a receiving space of the battery housing. The disadvantage of the isolating elements is that they are attached to the outside of the battery housing and are exposed to environmental influences and environmental effects due to stone fragments, etc. Summary of the invention

[0005] Based on the above-mentioned disadvantages of the prior art, the object of the present invention is to provide an improved insulator device for a battery housing and an improved battery housing for thermal insulation and / or electromagnetic insulation of a vehicle battery and a battery cell arrangement, respectively.

[0006] According to a first aspect, the object is achieved by an insulator device for a battery housing, wherein the battery housing comprises at least one housing wall for completely or at least partially closing an interior space for receiving a battery cell arrangement in the interior space.

[0007] The insulator device according to the invention comprises at least one first insulating layer, which is arranged between the battery cell arrangement in the interior space and the housing wall of the battery housing, wherein the at least one first insulating layer is configured for electrical and thermal insulation of the battery cell arrangement. The arrangement of the at least one first insulating layer in the interior space of the battery housing protects it from external influences, which can significantly reduce the risk of damage. In addition, the insulator device according to the invention can fulfil a dual function in terms of heat and electricity by initially insulating and isolating the actual battery housing from the received battery, respectively.

[0008] The insulator device can be formed substantially along an extension plane which extends between a housing wall of the battery housing and a battery cell arrangement received in the battery housing. The extension plane can preferably extend flat and planar, but according to the invention it can also be curved and arched, respectively.

[0009] Preferably, the dimension of at least one insulating layer orthogonal to the extension plane can be formed to be smaller than the dimension of at least one first insulating layer in the extension plane. The advantage of designing the insulator device as a thin insulating layer is that the insulator device can be used as a layer inserted between the battery cell housing and the battery cell device, and the existing gap can be reasonably used without significantly increasing the overall size of the battery housing.

[0010] For example, a dimension of the first insulating layer orthogonal to the plane of extension is at least 20 times smaller than a maximum dimension seen in the plane of extension of the first insulating layer.

[0011] In an exemplary embodiment, the first insulating layer may have a dimension of 1000 mm×2000 mm in the plane of the extension plane, and a dimension or thickness orthogonal to the aforementioned extension plane of 15 mm.

[0012] The at least one first insulating layer can be substantially planar, in particular plate-shaped, and have a first surface facing the battery cell arrangement and a second surface facing away from the battery cell arrangement.

[0013] A dimension of the at least one first insulating layer orthogonal to the plane of extension of the insulating layer may be at least 1 mm.

[0014] Preferably, it can be provided that at least one first insulation layer is detachably formed from the battery cell arrangement and / or the battery housing.

[0015] For example, the detachable connection can be mutually adapted latching elements, which are respectively formed between at least one first insulating layer and the opposing battery housing and a portion of the battery cell device to be connected. For example, a hook-loop connection can be provided to establish a detachable connection.

[0016] However, according to the invention, it is also possible to detachably connect at least one insulating layer to the battery housing and the battery cell arrangement, respectively, using screws, rivets or other commercially available fastening means. The provided embodiment of the detachable connection initially ensures that the insulator device according to the invention is fixed relative to the other parts of the battery housing and the battery cell arrangement, respectively, during operational use, but in the case of subsequent recycling, for example at the end of the useful life of the battery, it enables the battery housing and the battery cell arrangement to be disassembled, wherein the insulator device according to the invention can be separated from the other parts in a clean and residue-free manner.

[0017] In an alternative embodiment, the insulator device can also be inseparably connected to the battery housing and / or the battery cell device; such a connection can be achieved, for example, by gluing or thermally bonding or welding the insulator device according to the invention (preferably at least one first insulating layer) to components of the battery housing and / or the battery cell device.

[0018] The at least one first insulating layer can be made of a thermosetting material, in particular a fiber-reinforced and / or glass-reinforced material. Providing a thermosetting material ensures the stability of the at least one insulating layer even at elevated temperatures, for example during thermal runaway of the battery cell arrangement.

[0019] Thus, even under thermal stress, the thermosetting embodiment can ensure that the insulation layer and the insulator device, respectively, remain stable in the desired arrangement position for a longer period of time and do not significantly deform or bend under the thermal loads that occur. Thus, the insulation layer according to the invention can isolate fluids and particles escaping from the battery cell arrangement from the actual battery cell housing, at least in local areas.

[0020] According to the invention, it may be provided that at least one first insulating layer comprises a sheet molding compound (SMC) material.

[0021] The material forming the at least one first insulating layer, in particular the SMC material, may also comprise additives, in particular flame retardants, preferably aluminum trihydrate (ATH).

[0022] According to the present invention, at least one first insulating layer may include a plurality of protruding elements on a first surface thereof facing the battery cell device.

[0023] The protrusions and / or rib-like protrusions may preferably be formed to divide the gap between the battery cell device and the first surface into several gap segments and / or to form a discharge channel. In the event of thermal runaway of the battery cell of the battery cell device to be accepted, the discharge channel allows the fluid and particles in the discharge event escaping from the battery cell to be discharged along the defined path along the discharge channel. In particular, the fluid and particles can be directed to at least one safety valve of the battery cell housing. The provision of a discharge channel and / or gap segments also limits the diffusion of fluid and particles to a local area of ​​the battery housing in the event of thermal runaway of a single battery, thereby preventing or at least reducing thermal runaway of other single batteries. The construction of the rib-like protrusions has the additional advantage that the bending stiffness of the first insulating layer can be increased around its extension plane without having to increase the thickness of the insulating layer in the entire extension area. The above measures can increase the bending stiffness without causing a significant increase in weight.

[0024] The protruding elements can preferably be formed opposite the cell support structure of the battery cell device to be received so that forces, which are generated, for example, due to deformations in the area of ​​the housing wall, are introduced directly into the cell support structure. The arrangement of the protruding elements (preferably a rib arrangement) can be selected so that forces introduced into the battery housing and the housing wall of the battery housing from below (for example, forces introduced by the vehicle touching the ground or objects colliding under the vehicle) can be introduced directly into the support structure of the battery cell device via the ribs of the insulating layer and / or the protruding elements. This embodiment advantageously prevents direct damage to the battery cells and their electrical contacts of the received battery cell device when external forces act on the battery housing.

[0025] In particular, the rib-like protrusions may extend at least partially parallel to each other and / or the plurality of discharge channels may extend substantially parallel to each other. Preferably, it may be provided that the width of the formed discharge channel and thus the dimension of the discharge channel along the extension direction of the at least one first insulating layer is greater than the average height and thus the average dimension of the discharge channel orthogonal to the extension plane.

[0026] In addition to the at least one first insulation layer, the insulator arrangement may also include at least one second insulation layer which is arranged in the interior space between the first insulation layer and the housing wall.

[0027] The at least one second insulating layer can be substantially planar, in particular plate-shaped, and have a first surface facing the first insulating layer and a second surface facing away from the first insulating layer.

[0028] The at least one second insulating layer can be configured such that it can be detachably connected to the housing wall and / or preferably detachably connected to the first insulating layer.

[0029] The corresponding detachable connection can be carried out in the same way as the detachable connection of at least one first insulating layer to the battery housing or the battery cell arrangement. Alternatively, it can be provided according to the invention that at least one second insulating layer is permanently connected to at least one first insulating layer and / or at least a part of the battery housing. Such a permanent connection can be established, for example, by bonding, welding or similar connection methods.

[0030] The at least one first insulation layer and / or the at least one second insulation layer can comprise at least one layer of a composite material, such as in particular a fiber-reinforced composite material, and preferably a fiber composite material with a glass fiber content.

[0031] At least one layer of the composite material may include quartz glass fibers or silica glass fibers. Quartz glass fibers have an increased silicon dioxide (SiO2) content (>90%) compared to E-glass fibers and increased heat resistance in the range of more than 1000°C.

[0032] For example, at least one layer formed from the fiber composite material can be a unidirectional (UD) tape fabric. The matrix material of the composite material can particularly advantageously be formed from a plastic that is compatible with the battery housing. This makes it possible to form at least partial material bonds between the battery housing and / or the at least one first insulating layer and / or the at least one second insulating layer during the manufacturing process.

[0033] For example, at least one insulating layer can be formed from a thermoplastic polypropylene tape with unidirectional glass fiber reinforcement having a glass fiber weight content of 70% (PP-DU-GF70), and the battery housing can be formed from glass fiber reinforced polypropylene having a glass fiber weight content of 30% (PP-GF30).

[0034] In order to improve the bonding or adhesion of the at least one second insulating layer to the battery housing and / or the at least one first insulating layer, the at least one second insulating layer may be at least partially provided with a layer of adhesive.

[0035] The at least one second insulating layer may be configured to isolate electromagnetic radiation from the environment from the battery cell arrangement, or vice versa.

[0036] At least one second insulating layer can be formed by a foil made of metal, in particular an aluminum foil. The formed foil can be designed to be fully or at least partially perforated.

[0037] Furthermore, it can be provided that at least one second insulating layer comprises a foil made of plastic, which has an electrically conductive, in particular metallic, coating, for example a copper and / or nickel coating. The electromagnetic isolation layer can be formed by applying a thin layer of an electrically conductive layer. Providing the plastic with an electrically conductive coating reduces the resulting overall weight compared to providing a full layer of electrically conductive material.

[0038] The at least one second insulating layer may comprise a fabric of wires, in particular metal wires, or a fabric of plastic fibers with a conductive coating, in particular a metal coating, preferably a copper or nickel coating.

[0039] As an alternative to providing a woven fabric, it is also possible to provide a fiber woven fabric, for example a nonwoven fabric, in particular composed of metal fibers or plastic fibers with a corresponding metal coating, for forming the at least one second insulation layer according to the invention.

[0040] The at least one second insulating layer can be formed by a fabric, in particular a woven fabric or a non-woven fabric, having a coating, in particular a metal coating, preferably a copper or aluminum or nickel coating.

[0041] According to a second aspect of the present invention, a battery housing can be formed, which includes at least one housing wall for at least partially enclosing an internal space, wherein the internal space is configured to receive a battery cell device and at least one insulator device according to the first aspect of the present invention, wherein the at least one insulator device according to the present invention is arranged between the battery cell device in the internal space and the housing wall.

[0042] By arranging at least one first insulating device between the battery cell device and the shell wall, the shell wall is at least partially separated from or covered by the battery cell device, in particular the battery cell, by the insulating device according to the present invention, so that gases, fluids and / or particles escaping from the battery cell device can, for example, be isolated or insulated from the shell wall of the battery shell by at least one first insulating layer, and particularly preferably can also be discharged into a specific area of ​​the battery shell.

[0043] According to the present invention, at least one case wall of the battery case may be formed of a thermoplastic resin.

[0044] According to a further aspect of the invention, the insulator device according to the invention can be used in a battery housing of a motor vehicle battery, in particular a motor vehicle battery of an electric motor vehicle, such as in particular a car, an aircraft and / or a ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Hereinafter, exemplary embodiments of an insulator device and a battery case according to the present invention are described with reference to the accompanying drawings.

[0046] In the attached picture:

[0047] Figure 1 A schematic cross-sectional view showing a first exemplary embodiment of an insulator device according to the invention in a battery housing;

[0048] Figure 2AA schematic cross-sectional view showing a second exemplary embodiment of an insulator device according to the invention in a battery housing;

[0049] Figure 2B A schematic cross-sectional view showing a third exemplary embodiment of an insulator device according to the invention in a battery housing;

[0050] Figure 2C A schematic cross-sectional view showing a fourth exemplary embodiment of an insulator device according to the invention in a battery housing;

[0051] Figure 3A A schematic cross-sectional view showing a fifth exemplary embodiment of an insulator device according to the present invention in a battery housing when a discharge event occurs;

[0052] Figure 3B A fourth exemplary embodiment of an insulator device in a battery housing is shown when a crash event occurs. DETAILED DESCRIPTION

[0053] Figure 1 The insulator device 1 is shown in a battery housing 3, wherein the battery housing 3 comprises at least one housing wall 31 for enclosing an interior space 30. In order to simplify the illustration, Figure 1 Only a partial cross section of the battery housing 3 is shown. As shown, the battery cell device 5 is received in the inner space 30. Such a battery cell device 5 can be a combination of several individual battery cells 51, which are combined to form the battery cell device 5, for example, via further structural elements (such as, in particular, a cell supporting structure 53). For example, such a unit device may include a support or a support for receiving and separating the individual battery cells. By providing a battery cell device 5, several individual battery cells 51 can be combined to form an assembly, which has a higher mechanical stability.

[0054] Figure 1 A cross-sectional view of a first insulating layer 11 is shown, which is configured for electrical and thermal insulation of a battery cell device 5. The first insulating layer 11 is initially substantially flat and has a first surface 111 facing the battery cell device 5 and a second surface 112 facing away from the battery cell device 5. The illustrated specific exemplary embodiment of the first insulating layer 11 also includes a plurality of optional protruding elements 113 on its first surface 111, which are configured to form a gap between the battery cell device 5 and the first surface 111 and divide the gap into a plurality of gap segments, and respectively form a plurality of discharge channels 302, such as Figure 1 shown.

[0055] according to Figure 1 The insulator device 1 shown further comprises a second insulating layer 12 arranged between the first insulating layer 11 and the housing wall 31. Figure 1 As shown, the at least one second insulating layer 12 may extend substantially parallel to the at least one first insulating layer 11. However, according to the present invention, different forms of the first insulating layer 11 and / or the second insulating layer 12 may also be provided relative to the battery housing 3.

[0056] The second insulating layer 12 may also be substantially flat, in particular plate-shaped, and have a first surface 121 facing the first insulating layer 11 and a second surface 122 facing away from the first insulating layer 11. Here, the second surface 122 faces the housing wall 31.

[0057] The at least one second insulating layer 12 may be configured such that it may be detachably connected to the housing wall 31 and / or detachably connected to the first insulating layer 11 .

[0058] The second surface 122 of at least one first insulating layer may preferably be connected to the first surface 121 of at least one second insulating layer 12 , so that the first insulating layer 11 and the second insulating layer 12 form a common object.

[0059] At least one first insulating layer 11 may be configured such that it can be detachably connected to the battery housing 3 and / or the battery cell device 5. For example, the locking element ( Figure 1 ) can be arranged in the area of ​​the first insulating layer 11 or the protrusion 113, which can be detachably connected to a component of the battery cell device 5 (in particular a structural member of the battery cell device 5) for detachably fixing the insulator device 1 relative to the battery cell device 5.

[0060] Figure 2A 2 shows a schematic cross-sectional view of a second exemplary embodiment of an insulator device 1 according to the invention, the insulator device 1 comprising a first insulating layer 11 and a second insulating layer 12. Figure 1 Compared to the embodiment shown, in the embodiment shown, the first insulating layer 11 does not have any protruding elements 113. Figure 2A In the illustrated embodiment, the first insulating layer 11 and the second insulating layer 12 are detachably connected to each other. Figure 2A It can be seen that the second surface 112 of the first insulating layer 11 and the first surface 121 of the second insulating layer 12 are directly adjacent to each other so as to be detachably connected, and the distance between each other is small, wherein elements for realizing a detachable connection between the first insulating layer 11 and the second insulating layer 12, such as a hook-and-eye connection, can be arranged.

[0061] In addition, according to Figure 2AIn an embodiment of the invention, the insulator device 1 is detachably connected to the housing wall 31 of the battery housing. In this respect, the second surface 122 of the second insulating layer 12 extends at least partially parallel to the housing wall 31 and respectively abuts against the housing wall 31 so that a detachable connection is formed exactly between the insulator device 1 and the housing wall 31 via the second insulating layer 12 in this region. The detachable connection between the housing wall 31 and the second insulating layer 12 or between the second insulating layer 12 and the first insulating layer 11 can in particular be a hook and eye connection, for example a Velcro-type connection or an alternative detachable connection type.

[0062] Figure 2B An alternative third embodiment of an insulator device 1 according to the invention is shown, which likewise comprises a first insulating layer 11 and a second insulating layer 12. However, unlike Figure 2A In contrast to the embodiment shown, the insulator device 1 is connected to the housing wall 31 of the battery housing 3 inseparably, in particular in a press fit and / or form fit manner. The insulator device 1 can also be connected to the battery housing 3 by material bonding. The second surface 112 of the first insulating layer 11 is formed directly adjacent to the first surface 121 of the second insulating layer 12 and forms a common surface with the latter. In addition, the second surface 122 of the second insulating layer 22 is formed directly adjacent to the housing wall 31.

[0063] The corresponding press-fit and / or form-fit connection can be, for example, an adhesive bond, in particular an adhesive can also be used between the at least one first insulation layer 11 and / or the second insulation layer 12 and / or the housing wall 31 .

[0064] Figure 2C A fourth exemplary embodiment of an insulator device 1 according to the invention is shown, wherein according to Figure 2C The embodiments are initially based on Figure 2B An embodiment of the present invention is designed in which a press fit and a form fit connection are established between the first insulating layer 11 and the second insulating layer 12 and the housing wall 31. Figure 2B In contrast, the second insulating layer 12 is longer than the first insulating layer 11 in the region to the left of the drawing plane, which means that the first insulating layer 11 does not cover the second insulating layer 12 at least in a left partial region in the direction of the illustrated battery cell arrangement 5 .

[0065] Figure 3A and Figure 3BA fifth exemplary embodiment of an insulator device 1 according to the invention is shown together, which also comprises a first insulating layer 11 and a second insulating layer 12 which are connected to one another, the second insulating layer 12 also being connected to the housing wall 31 of the battery housing 3. The first insulating layer 11 has a plurality of protrusions 113 on its first surface 111 facing the battery cell arrangement 5, which protrusions are rib-shaped in the illustrated embodiment. Due to the rib-shaped protrusions 113, the gap between the received battery cell arrangement 5 and the first surface 111 of the first insulating layer is divided into several sub-areas which are essentially separated from one another by the rib-shaped protrusions 113, and in the illustrated variant, the rib-shaped protrusions 113 form three drainage channels 302. The cross-sectional profile of the drainage channel 302 is shown in the image plane, which is in the shape of a rib. Figure 3A and Figure 3B extends in the depth of the image plane.

[0066] Now, if thermal runaway occurs in a single battery cell 51 enclosed in the battery cell device 5, as Figure 3A As schematically shown in FIG. 1 , hot exhaust gases, fluids and particles can escape from the safety valve (not shown) of a single battery cell at high speed and under high pressure. Now, they hit the first insulating layer 11 of the insulator device 1 and can be guided through the corresponding exhaust channel 302, for example to the safety valve of the battery housing 3. The provided device prevents the hot exhaust gases and particles from directly hitting the housing wall 31 of the battery housing 3, while guiding the escaping gases into the corresponding exhaust channel 302, which can reduce the thermal stress of the adjacent single battery cells 51 in the battery cell device 5.

[0067] from Figure 3A and Figure 3B It can be seen that the protrusions 113 of the first insulating layer 11 are formed opposite to each other with the cell support structure and the cell support element 53 of the battery cell device 5. No protrusions 113 are arranged in the area of ​​the individual battery cells 51. Figure 3B As shown, if an object (such as a stone) hits the outer area of ​​the battery housing 5, the generated force can be directly transmitted from the battery housing 3 via the insulator device 1 (especially via the protruding elements 113 of its first insulating layer 11) to the cell support structure 53, respectively, and is advantageously introduced into the cell support structure 53. Therefore, according to the present invention, it is possible to prevent or greatly reduce the introduction or transmission of external forces to the individual battery cells 51.

Claims

1. An insulator device (1) for a battery housing (3), The battery housing (3) comprises at least one housing wall (31) for enclosing an inner space (30) for receiving the battery cell device (5). The insulator device (1) comprises: at least one first insulating layer (11) arranged in the interior space (30) between the battery cell arrangement (5) and the housing wall (31), The at least one first insulating layer (11) is configured to be used for electrical insulation and thermal insulation of the battery cell device (5).

2. The insulator device (1) according to claim 1, wherein a dimension of at least one insulating layer (11) orthogonal to an extension plane is smaller than a dimension of the at least one first insulating layer (11) in the extension plane.

3. An insulator device (1) according to claim 1 or 2, wherein the at least one first insulating layer (11) is substantially flat, in particular plate-shaped, and has a first surface (111) facing the battery cell device (5) and a second surface (112) facing away from the battery cell device (5).

4. The insulator device (1) according to any one of claims 1 to 3, wherein a dimension of at least one insulating layer (11) orthogonal to the extension plane of the first insulating layer (11) is at least 1 mm.

5. The insulator device (1) according to any one of claims 1 to 4, wherein the at least one first insulating layer (11) is detachably connected to the battery housing (3) and / or the battery cell arrangement (5).

6. Insulator device (1) according to any one of claims 1 to 5, wherein the at least one first insulating layer (11) comprises a thermosetting material, in particular a fiber-reinforced and / or glass-fiber-reinforced thermosetting material.

7. The insulator device (1) according to claim 6, wherein the at least one first insulating layer (11) comprises a sheet molding compound (SMC) material.

8. Insulator device (1) according to claim 7, wherein the sheet molding compound material comprises an additive, in particular a flame retardant material, preferably aluminum trihydrate (ATH).

9. The insulator device (1) according to any one of claims 1 to 8, wherein the at least one first insulating layer (11) comprises a plurality of protruding elements (113) on its first surface (111), the protruding elements (113) comprising bumps and / or rib-like protrusions.

10. An insulator device (1) according to claim 9, wherein the protrusions and / or rib-like protrusions are formed to divide the gap between the battery cell device (5) and the first surface (111) into a plurality of gap segments (301) and / or to form a discharge channel (302).

11. An insulator device (1) according to claim 9 or 10, wherein the rib-like protrusions extend at least in segments parallel to each other, and / or the multiple discharge channels (302) extend substantially parallel to each other, wherein preferably, the width of the formed discharge channels (302) is greater than the average height of the discharge channels (302).

12. An insulator device (1) according to any one of claims 9 to 11, wherein the protruding element (113) is formed opposite to the cell support structure of the battery cell device (5) to be received so as to directly introduce the force generated in the area of ​​the shell wall (31) into the cell support structure.

13. The insulator device (1) according to any one of claims 1 to 12, wherein the insulator device (1) further comprises at least one second insulating layer (12), which is arranged between the first insulating layer (11) and the shell wall (31) in the inner space (30).

14. An insulator device (1) according to claim 13, wherein the at least one second insulating layer (12) is substantially flat, in particular plate-shaped, and has a first surface (121) facing the first insulating layer (11) and a second surface (122) facing away from the first insulating layer (11).

15. Insulator arrangement (1) according to claim 13 or 14, wherein the at least one second insulating layer (12) is detachably connected to the housing wall (31) and / or the first insulating layer (11).

16. The insulator device (1) according to any one of claims 13 to 15, wherein the second surface (122) of the at least one first insulating layer (11) is connected to the first surface (121) of the at least one second insulating layer (12).

17. Insulator arrangement (1) according to any one of claims 13 to 16, wherein the at least one second insulating layer (12) comprises a foil made of metal, in particular an aluminium foil.

18. Insulator arrangement (1) according to any one of claims 13 to 16, wherein the at least one second insulating layer (12) comprises a foil made of plastic with a metal coating, in particular a copper and / or nickel coating.

19. An insulator device (1) according to any one of claims 13 to 16, wherein the at least one second insulating layer (12) comprises a fabric formed by wires, in particular metal wires, or a fabric formed by plastic fibers having a coating, in particular a metal coating, in particular a copper or nickel coating.

20. Insulator device (1) according to any one of claims 13 to 16, wherein the at least one second insulating layer (12) comprises a cloth, in particular a woven fabric or a non-woven fabric with a coating, in particular a metal coating, preferably a copper or aluminum or nickel coating.

21. A battery housing (3), comprising: at least one housing wall (31) for enclosing an interior space (30) for receiving a battery cell arrangement (5), and at least one insulator device (1) having the features according to any one of claims 1 to 20; The at least one insulating device (1) is arranged in the interior space (30) between the battery cell arrangement (5) and the housing wall (31).

22. The battery housing (3) according to claim 21, wherein the at least one housing wall (31) is formed of a thermoplastic resin.

23. Use of an insulator device (1) according to any one of claims 1 to 20 in a battery housing (3) of a motor vehicle battery, in particular of a motor vehicle battery for an electrically driven motor vehicle.

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