BATTERY SHELL COMPRISING A REINFORCING NONWOVEN, METHOD OF PRODUCTION AND TRACTION BATTERY

Abstract

A battery shell includes a reinforcing nonwoven with long fibers and a polymer matrix.

Claims

1. A battery shell of a traction battery, wherein the battery shell has a bottom and side walls, wherein the battery shell has an inner side and an outer side, characterized in that the battery shell has a reinforcing nonwoven of long fibers and a polymer matrix.

2. The battery shell according to claim 1, characterized in that the long fibers have a length between 0.5 mm and 20 mm.

3. The battery shell according to claim 1, characterized in that the battery shell has a fiber volume fraction greater than or equal to 20%.

4. The battery shell according to claim 1, characterized in that the polymer matrix is a thermoplastic material.

5. The battery shell according to claim 1, characterized in that the long fibers have a glass fiber and/or a carbon fiber and/or an aramid fiber.

6. The battery shell according to claim 1, characterized in that the battery shell has a metal insert for fastening the battery shell.

7. The battery shell according to claim 1, characterized in that at least one side wall of the battery shell has a deviating height.

8. A method of production of the battery shell of claim 1, wherein the method comprises the following steps: forming the battery shell from a preform having the reinforcing nonwoven using a compression mold having a cavity; and demolding the battery shell.

9. The method according to claim 8, characterized in that a molding compound for the preform is provided by mixing a molten thermoplastic material with long fibers.

10. The method according to claim 8, characterized in that, prior to forming the battery shell, the preform is formed by an extruder nozzle; and/or introduced into a pressing tool.

11. The method according to claim 10, characterized in that the extruder nozzle is a wide slot nozzle.

12. The method according to claim 10, characterized in that a cavity of the pressing tool has a variable volume.

13. The method according to claim 8, characterized in that an insert is introduced into the cavity before the battery shell is formed.

14. The method according to claim 8, characterized in that, prior to forming the battery shell, a metal insert for fastening the battery shell is introduced into the cavity.

15. (canceled)

16. A traction battery having a battery shell according to claim 1.

17. The battery shell according to claim 1, characterized in that the polymer matrix is made of a polypropylene, PA6 or PA6,6.

18. The battery shell according to claim 6, wherein the metal insert has an internal thread.

19. The method of claim 8, wherein the compression mold is a plunge edge mold.

20. The method of claim 12, wherein the pressing tool is a plunge edge tool.

21. The method of claim 14, wherein the metal insert is brought into an operative connection with a holding device in the cavity when introduced into the cavity.

Description

DESCRIPTION OF THE DRAWINGS

[0106] Further advantages, details and features will be apparent below from the examples of embodiments explained. In the drawings, in detail:

[0107] FIG. 1: shows schematically a section of a battery shell;

[0108] FIG. 2: shows a schematic of a section of a battery shell in a section of a pressing tool with standard separation; and

[0109] FIG. 3: shows schematically a section of a battery shell in a section of a plunge edge tool.

DESCRIPTION OF EMBODIMENTS

[0110] The battery shell 100 in FIG. 1 is monolithically molded from a thermoplastic plastics material (not shown) that encloses a reinforcing nonwoven (not shown).

[0111] The battery shell 100 has a bottom 102, at least one side wall 104, and a peripheral collar 120.

[0112] Furthermore, the battery shell 100 has an inner reinforcing nonwoven element 140 for reinforcing the battery shell 100, which is also monolithically formed with the battery shell 100 and thus also has a reinforcing nonwoven (not shown).

[0113] The inner stiffening element 140 has stiffening ribs 141 on both sides (only visible on one side), which additionally stiffen the battery shell 100 and also have a reinforcing nonwoven (not shown).

[0114] The collar 120 also has a reinforcing nonwoven (not shown) within it.

[0115] The collar 120 of the battery shell 100 further has at least one metal insert 110, by means of which the battery shell 100 can be fastened and/or connected to a deviating battery shell (not shown) to form a battery housing (not shown).

[0116] Also, the bottom 102 of the battery shell 100 has at least one metal insert 110 by means of which designated components (not shown) in the battery shell 100 can be connected.

[0117] FIG. 2 shows a section of a battery shell 100 in a section of a multi-part pressing tool with standard separation (160). As can be seen, any ridge 150 of the battery shell 100 extends in the separation plane (not designated) of the pressing tool with standard separation (160).

[0118] FIG. 3 shows a section of a battery shell 100 in a section of a multi-part plunge edge tool (170). Here, any ridge 150 of the battery shell 100 extends in the direction (not designated) in which the plunge edge tool (170) can be opened and closed.

[0119] It is to be understood that the foregoing is a description of one or more preferred exemplary embodiments of the invention. The invention is not limited to the particular embodiment(s) disclosed herein, but rather is defined solely by the claims. Furthermore, the statements contained in the foregoing description relate to particular embodiments and are not to be construed as limitations on the scope of the invention or on the definition of terms used in the claims, except where a term or phrase is expressly defined above. Various other embodiments and various changes and modifications to the disclosed embodiment(s) will become apparent to those skilled in the art. All such other embodiments, changes, and modifications are intended to come within the scope of the appended claims.

[0120] As used in this specification and claims, the terms for example, for instance, such as, and like, and the verbs comprising, having, including, and their other verb forms, when used in conjunction with a listing of one or more components or other items, are each to be construed as open-ended, meaning that the listing is not to be considered as excluding other, additional components or items. Other terms are to be construed using their broadest reasonable meaning unless they are used in a context that requires a different interpretation.

LIST OF REFERENCE SIGNS

[0121] 100 battery shell [0122] 102 bottom [0123] 104 side wall [0124] 110 metal insert [0125] 120 collar [0126] 140 inner stiffening element [0127] 141 stiffening ribs [0128] 150 ridge [0129] 160 Pressing tool with standard separation [0130] 170 plunge edge tool