BATTERY HOUSING FOR RECEIVING AT LEAST ONE BATTERY CELL MODULE

Abstract

A battery housing for receiving at least one battery cell module is disclosed. The battery housing includes at least one housing part surrounding a housing interior. A film composed of a metal is arranged, at least in portions, on an outside of the at least one housing part facing away from the housing interior. A studded structure is provided on a surface of the film facing away from the at least one housing part. The studded structure includes a plurality of studs arranged spaced apart from one another and projecting from the surface of the film. The plurality of studs support themselves on the outside of the at least one housing part.

Claims

1. A battery housing for receiving at least one battery cell module, comprising: at least one housing part surrounding a housing interior, a film composed of a metal arranged, at least in portions on an outside of the at least one housing part facing away from the housing interior, wherein on a surface of the film facing the at least one housing part a studded structure is provided that includes a plurality of studs arranged spaced apart from one another and projecting from the surface of the film, wherein the plurality of studs support themselves on the outside of the at least one housing part.

2. The battery housing according to claim 1, wherein the film is connected to the at least one housing part via the plurality of studs such that between the film and the at least one housing part at least one intermediate space is provided.

3. The battery housing according to claim 2, wherein the at least one intermediate space is at least partially filled with a thermal insulation.

4. The battery housing according to claim 3, wherein the thermal insulation includes a foam material or a fibre fleece.

5. The battery housing according to claim 1, wherein the plurality of studs, for providing the studded structure, are arranged grid-like on the surface of the film.

6. The battery housing according to claim 1, wherein the plurality of studs each have a stud height measured perpendicularly to the surface of the film, that amounts to between 2560 μm and 2680 μm.

7. The battery housing according to claim 1, wherein a total film height measured perpendicularly to the surface of the film amounts to between 1.5 mm and 5.3 mm.

8. The battery housing according to claim 6, wherein a ratio of the stud height to a stud spacing of two adjacent studs amounts to between 0.15 and 0.25.

9. The battery housing according to claim 1, wherein at least one stud of the studded structure has a spherical segment-shaped form, a truncated cone-shaped form, a truncated pyramid-shaped form, or serpentine geometrical form.

10. The battery housing according to claim 1, wherein the metal of the film is aluminium or stainless steel.

11. The battery housing according to claim 1, wherein the studded structure with the plurality of studs is stamped.

12. The battery housing according to claim 1, wherein the at least one housing part includes a first housing part and a second housing part, wherein the first housing part is structured as a housing pot comprising a housing opening and the second housing part is structured as a housing lid that closes the housing opening of the housing pot.

13. The battery housing according to the claim 1, wherein a material of the at least one housing part includes a plastic or a metal.

14. A battery arrangement, comprising: a battery housing, the battery housing including: at least one housing part surrounding a housing interior, a film composed of a metal arranged, at least in portions on an outside of the at least one housing part facing away from the housing interior, wherein on a surface of the film facing the at least one housing part a studded structure is provided that includes a plurality of studs arranged spaced apart from one another and projecting from the surface of the film, wherein the plurality of studs support themselves on the outside of the at least one housing part, and at least one battery cell module arranged in the housing interior of the battery housing.

15. The battery arrangement according to claim 14, wherein the film is a fire protection film and is connected to the at least one housing part via the plurality of studs such that at least one intermediate space is provided between the film and the at least one housing part.

16. The battery arrangement according to claim 15, wherein the at least one intermediate space is at least partially filed with a thermal insulation.

17. The battery arrangement according to claim 16, wherein the thermal insulation includes a foam material or a fibre fleece material.

18. The battery arrangement according to claim 14, wherein the plurality of studs are arranged in a grid-like pattern on the surface of the film.

19. The battery arrangement according to claim 14, wherein the plurality of studs each have a stud height, measured perpendicularly to the surface of the film, that amounts to between 1020 μm and 1150 μm.

20. The battery arrangement according to claim 14, wherein the metal of the film is aluminium or stainless steel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] It shows, in each case schematically:

[0030] FIG. 1 a first housing part of the battery housing according to the invention formed as housing pot with fire protection film, in a perspective representation,

[0031] FIG. 2 a second housing part of the battery housing according to the invention formed as housing lid with fire protection film, likewise in a perspective representation,

[0032] FIG. 3 the fire protection film arranged outside on the housing lid of FIG. 2 in a separate perspective representation,

[0033] FIG. 4 a sectional representation of the housing lid shown in FIG. 2, in which the arrangement of the studded structure on the housing lid is noticeable,

[0034] FIG. 5 a further development of the housing lid of FIG. 3, in which in the intermediate space formed between the film and the housing lid by means of the studded structure a thermal insulation is arranged.

DETAILED DESCRIPTION

[0035] The FIGS. 1 and 2 each show exemplarily a housing part 2 of a battery housing 1 according to the invention in a perspective representation. In the example of the figures, the battery housing 1 is formed in two parts having a first and having a second housing part 2a, 2b, wherein the FIG. 1 shows the first housing part 2a and FIG. 2 the second housing part 2b. The first housing part 2a is formed by a housing pot 9 comprising a housing opening 10. The second housing part 2b is formed by a housing lid 11, by means of which the housing opening 10 of the housing pot 9 can be closed. The two housing parts 2a, 2b that is the housing pot 9 and the housing lid 11, surround, in a state of the housing lid mounted on the housing pot 9, in which the same closes the housing opening 10, surround a housing interior 3.

[0036] Preferably, a plastic, preferably a thermoplastic, can be used as material for the housing parts 2a, 2b. Alternatively to this however a metal can also be considered as material for the housing parts 2a, 2b.

[0037] Further, the battery housing 1 according to the FIGS. 1 and 2 includes a film 4 made of a metal, for example of aluminium or of stainless steel, which is arranged on an outside 12 of the first housing part 2a (see FIG. 1) facing away from the housing interior 3, and also on an outside 13 of the second housing part 2b (see FIG. 2) facing away from the housing interior 3. In the example of FIG. 1, the film 4 covers the outside 12 of the first housing part 2a, i.e. of the housing pot 9, completely. Thus, the film 4, seen by itself, has the same geometrical form as the housing pot 9, i.e. a pot-like geometry.

[0038] FIG. 3 shows the film 4 shown in FIG. 2 and arranged outside on the second housing part 2b, that is the housing lid 11 in a separate perspective representation. The film 4 functions as fire protection film for the battery housing 1. As is noticeable from FIG. 3, a studded structure 5 is formed on a surface 6 of the film 4 facing the second housing part 2b or the housing lid 11. This studded structure 5 that is indicated only roughly schematically in the representation of FIG. 3 and not noticeable in the FIGS. 1 and 2 includes a plurality of studs 7 arranged spaced apart from one another and projecting from the surface 6 of the film 4. These studs 7 support themselves on the outside 12 of the first housing part 2a, or on the outside 13 of the second housing part 2b. As illustrated in FIG. 3, the studs are arranged grid-like for forming the studded structure 5 on the surface 6 of the film 4. The studded structure 5 with the studs 7 can be in the form of a stamping, i.e. produced by means of a stamping operation.

[0039] The studs 7 of the studded structure 5 indicated only roughly schematically in FIG. 3 can have different geometrical forms. Conceivable is a truncated cone-shaped or truncated pyramid-shaped or serpentine geometrical form. Whereas with the truncated cone-shaped and truncated pyramid-shaped geometrical form, each individual stud 7 in each case substantially forms a point-contact with the respective housing parts 2a, 2b, a line contact is realised with the serpentine geometrical form. Here it is conceivable that the individual studs 7 have a different geometrical form. It is conceivable, in particular to combine the geometrical forms of the studs 7 in the studded structure 5 explained above with one another.

[0040] As is additionally illustrated in FIG. 3, multiple fastening elements 15 each with a clip-like geometry are provided on an encircling edge 16 of the film 4 spaced apart from one another, which in each case project from the film at an angle and can support fixing the film 4 to the housing lid 11 (see FIG. 3). When the material of the housing lid 11 is a metal, an electrical connection between the film 4 and the housing lid can be improved in this way.

[0041] FIG. 4 is a part representation of the second housing part 2b and the film 4 arranged thereon in a section. Accordingly, the studs 7 can also have a spherical segment-shaped geometrical form. A semi-spherical-shaped geometrical form which is not shown is also conceivable as an alternative thereto.

[0042] As illustrated by FIG. 4, the studs 7 have a stud height NH measured perpendicularly to the surface 6 of the film 4 which in the example scenario amounts to between 2560 μm and 2680 μm, preferentially between 1020 μm and 1150 μm. A total film height FH measured perpendicularly to the surface 6 of the film 4, which also includes the stud height NH shown in FIG. 5, amounts to between 1.5 mm and 5.3 mm. A ratio of the stud height NH to a respective stud spacing NA of two adjacent studs 7 can amount to between 0.15 and 0.25.

[0043] As is additionally evident from FIG. 4, the film 4 is mechanically connected to the second housing part 2b exclusively by means of the studs 7, so that between the film 4 and the housing part 2 intermediate spaces 8 are formed.

[0044] FIG. 5 shows in an analogous manner to FIG. 3 the film 4 in a separate perspective representation. The FIG. 5 illustrates that the intermediate space 8 formed between the film 4 and the second housing part 2b by means of the studs 7 can be filled with a thermal insulation 14. The thermal insulation 14 can be formed by a foam material or by a fibre fleece.