BATTERY HOUSING FOR AT LEAST ONE BATTERY CELL HAVING A CERAMIC OR GLASS-LIKE OR METALLIC PROTECTIVE COATING, AND MOTOR VEHICLE

Abstract

A housing for at least one battery cell of an electrical energy accumulator of an at least partially electrically operated motor vehicle, having an interior of the battery housing, which is designed for arranging the at least one battery cell, and having at least one protective coating formed on at least one housing wall of the battery housing and facing toward the interior, wherein the protective coating is ceramic or glass-like or metallic and is designed to generate a degassing flow in the event of degassing of the battery cell from the interior of the battery housing. The disclosure furthermore relates to a motor vehicle.

Claims

1. A battery housing comprising: at least one battery cell of an electrical energy accumulator of an at least partially electrically operated motor vehicle, having an interior of the battery housing, which is designed for arranging the at least one battery cell, and having at least one protective coating formed on at least one housing wall of the battery housing and facing toward the interior, and the protective coating is ceramic or glass-like or metallic and is designed to generate a degassing flow in the event of degassing of the battery cell from the interior of the battery housing.

2. The battery housing as claimed in claim 1, wherein the battery housing has a degassing opening, which is designed to discharge the degassing flow from the interior into an environment of the battery housing.

3. The battery housing as claimed in claim 2, wherein the degassing opening has a bursting membrane, which is designed to burst in the event of a predetermined degassing pressure in the interior and to discharge the degassing flow into the environment.

4. The battery housing as claimed in claim 1, wherein the battery housing has an additional degassing element which is designed to be arranged between the battery cell and at least one housing wall in the interior.

5. The battery housing as claimed in claim 4, wherein the degassing element is angled at a first end of the degassing element and/or at a second end of the degassing element opposite to the first end.

6. The battery housing as claimed in claim 1, wherein the at least one coated housing wall is opposite to at least one degassing device of the battery cell.

7. The battery housing as claimed in claim 1, wherein the battery housing is made of aluminum.

8. The battery housing as claimed in claim 1, wherein the protective coating is dimensionally stable during degassing of the battery cell.

9. The battery housing as claimed in claim 1, wherein a cover element of the battery housing and/or a first side element of the battery housing and/or a second side element of the battery housing and/or a base element of the battery housing has the protective coating.

10. The battery housing as claimed in claim 2, wherein the protective coating is dimensionally stable during degassing of the battery cell.

11. The battery housing as claimed in claim 3, wherein the protective coating is dimensionally stable during degassing of the battery cell.

12. The battery housing as claimed in claim 4, wherein the protective coating is dimensionally stable during degassing of the battery cell.

13. The battery housing as claimed in claim 5, wherein the protective coating is dimensionally stable during degassing of the battery cell.

14. The battery housing as claimed in claim 6, wherein the protective coating is dimensionally stable during degassing of the battery cell.

15. The battery housing as claimed in claim 7, wherein the protective coating is dimensionally stable during degassing of the battery cell.

16. The battery housing as claimed in claim 2, wherein a cover element of the battery housing and/or a first side element of the battery housing and/or a second side element of the battery housing and/or a base element of the battery housing has the protective coating.

17. The battery housing as claimed in claim 3, wherein a cover element of the battery housing and/or a first side element of the battery housing and/or a second side element of the battery housing and/or a base element of the battery housing has the protective coating.

18. The battery housing as claimed in claim 4, wherein a cover element of the battery housing and/or a first side element of the battery housing and/or a second side element of the battery housing and/or a base element of the battery housing has the protective coating.

19. The battery housing as claimed in claim 5, wherein a cover element of the battery housing and/or a first side element of the battery housing and/or a second side element of the battery housing and/or a base element of the battery housing has the protective coating.

20. The battery housing as claimed in claim 6, wherein a cover element of the battery housing and/or a first side element of the battery housing and/or a second side element of the battery housing and/or a base element of the battery housing has the protective coating.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Exemplary embodiments of the invention are described hereinafter. In the figures:

[0025] FIG. 1 shows a schematic side view of an embodiment of a battery housing; and

[0026] FIG. 2 shows a further schematic side view of a further embodiment of the battery housing.

DETAILED DESCRIPTION

[0027] The exemplary embodiments explained hereinafter are preferred embodiments of the invention. In the exemplary embodiments, the described components of the embodiments each represent individual features of the invention to be considered independently of one another, which each also refine the invention independently of one another. Therefore, the disclosure is intended to comprise combinations of the features of the embodiments other than those shown. Furthermore, the described embodiments can also be supplemented by further features of the invention that have already been described.

[0028] In the figures, the same reference numerals designate elements that have the same function.

[0029] FIG. 1 shows a schematic side view of an embodiment of a battery housing 10. In the present exemplary embodiment, the battery housing 10 is embodied, in particular, purely schematically in a motor vehicle 12 shown purely schematically. The battery housing 10 has an interior 14. In particular, a battery cell 16 can be arranged in the interior 14. In the present exemplary embodiment, the battery cell 16 is arranged in the interior 14.

[0030] In the present exemplary embodiment, the battery housing 10 has, in particular, a cover element 18, a first side element 20, and a second side element 22. Furthermore, the battery housing 10 has a base element 24.

[0031] The battery housing 10 is designed for the at least one battery cell 16 of an electrical energy accumulator 26 of the at least partially electrically operated motor vehicle 12. In particular, the electrical energy accumulator 26 can be formed from a plurality of battery cells 16. For this purpose, the electrical energy accumulator 26 can have a plurality of battery housings 10, wherein each of the battery housings 10 can in turn have a plurality of battery cells 16. In particular, the battery housing can thus be formed as part of a battery module, wherein the electrical energy accumulator 26 can in turn have a large number of battery modules. The battery housing 10 has the interior 14, which is formed for the arrangement of the at least one battery cell 16. Furthermore, the battery housing 10 has a first housing wall 18, 20, 22, 24. In the present exemplary embodiment, the housing walls 18, 20, 22, 24 are formed in particular by the cover element 18, by the first side wall 20, by the second side wall 22, and by the base element 24.

[0032] In particular, the battery housing 10 has a protective coating 28 facing toward the interior 14. In the present exemplary embodiment, in particular the cover element 18 has the protective coating 28, the first side element 20 has the protective coating 28, and the second side element 22 has the protective coating 28.

[0033] It is provided that the protective coating 28 is ceramic or glass-like or metallic and is designed to generate a degassing flow 30 in the event of degassing 32 of the battery cell 16 from the interior 14 of the battery housing 10.

[0034] In the present exemplary embodiment, it is shown in particular that the battery cell 16 can have an anode 34 and a cathode 36. FIG. 1 also shows that the battery cell 16 can have a degassing device 50. The degassing device 50 is, in particular, designed to selectively guide the resulting gas from the battery cell during the degassing 32 of the battery cell 16. In particular, it is then provided that the at least one coated housing wall, in the present exemplary embodiment the coated cover element 18, is at least opposite to the degassing device 50 of the battery cell 16.

[0035] Furthermore, FIG. 1 shows that the battery housing 10 can have a degassing opening 38, which is designed to discharge the degassing flow 30 from the interior 14 into an environment 40 of the battery housing 10. For this purpose, for example, it can be provided that the degassing opening 38 has a bursting membrane 42, which is designed to burst in the event of a predetermined degassing pressure in the interior 14 and to discharge the degassing flow 30 into the environment 40.

[0036] In particular, FIG. 1 furthermore shows that the cover element 18 and/or the first side element 20 and/or the second side element 22 can have the protective coating 18.

[0037] FIG. 2 shows a schematic side view of a further embodiment of the battery housing 10. In the present exemplary embodiment, it is shown in particular that the battery housing 10 can have an additional degassing element 44, which is designed to be arranged between the battery cell 16 and at least one housing wall 18, 20, 22, 24, in the present exemplary embodiment between the battery cell 16 and the cover element 18, in the interior 14. In particular, it can be provided for this purpose that the degassing element 44 is angled at a first end 46 and/or at a second end 48 opposite to the first end 46. The degassing flow 30 can thus be discharged in an improved manner. In particular, it can be provided for this purpose that the degassing element 44 can have the protective coating 28. In particular, it is then apparent in the present exemplary embodiment that the cover element 18 does not have a protective coating 28, since the cover element 18 is already protected from the degassing 32 by the degassing element 44. The degassing element 44 is arranged in the present case between the degassing device 50 and the cover element 18 and thus protects the cover element 18.

[0038] In particular, it can furthermore be provided that the battery housing 10 is made of aluminum. In particular, a light battery housing 10 can thereby be provided. Appropriate fire protection can be implemented by the protective coating 28.

[0039] Furthermore, it can in particular be provided that the protective coating 28 is dimensionally stable during the degassing 32 of the battery cell 16.

[0040] In particular, it is thus shown that the application of the temperature-resistant and chemical-resistant protective coating 28 of the battery housing 10 can improve the temperature resistance, in particular of light metals which form the battery housing 10, and thus separate fire protection measures can be reduced. In addition, the housing components can be used to selectively discharge the gas escaping from the battery cell 16. The fire protection and safety concept of the battery housing 10 can thus be improved.

[0041] In particular, it can be provided for this purpose that the housing components or further components, which in the case of degassing 32 are directly exposed to high temperatures by the degassing battery cell 16, are completely or only partially covered using a resistant coating, in other words the protective coating 28. In addition, the housing components can be actively used for the selective discharge of the gases. A glass-like or ceramic or metallic protective coating 28 can in particular be used to protect the surface.

[0042] Overall, the invention discloses an integrated and partial protective coating 28 of battery housing components to protect the battery housing 10.