Protective arrangement for a battery cell

A deformable non-conductive coating on the inner and outer sides of the metal cell housing addresses the complexity and inefficiency of existing battery cell protection methods, enhancing mechanical stability, electrical insulation, and electrolyte wetting to prevent short circuits and thermal runaway, while improving energy density.

DE102024200767A1Pending Publication Date: 2025-07-31VOLKSWAGEN AG
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Patent Information

Application Number
DE102024200767
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-01-29
Publication Date
2025-07-31

AI Technical Summary

Technical Problem

Existing battery cell protection arrangements are complex, reduce energy density, and fail to prevent metal housing deformation from causing short circuits and thermal runaway due to inadequate mechanical and electrical protection.

Method used

A deformable non-conductive coating is applied to the inner and outer sides of the metal cell housing, providing mechanical stability and electrical insulation, while maintaining pressure resistance and enhancing electrolyte wetting.

Benefits of technology

Prevents metal housing penetration into electrodes, reduces the risk of short circuits and thermal runaway, simplifies assembly, and improves energy density by ensuring effective electrolyte penetration.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention provides a protective arrangement (1) for a battery cell, wherein the protective arrangement (1) comprises a cell housing (2) and a first coating (3), wherein the first coating (3) is designed such that it is connected to an inner side of the cell housing (2) and is deformable.
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Claims

[1] Protection arrangement (1) for a battery cell, comprising: - a cell housing (2); and - a first coating (3), wherein the first coating (3) is designed such that it is connected to an inner side of the cell housing (2) and is deformable. [2] The protective arrangement (1) according to claim 1, wherein the first coating is formed using a non-conductive material. [3] Protection arrangement (1) according to one of the preceding claims, comprising a second coating (3), wherein the second coating (3) is connected to an outer side of the cell housing and is deformable. [4] Protective arrangement (1) according to one of the preceding claims, wherein the first and second coating (3) comprise a polymer. [5] Protective arrangement (1) according to one of the preceding claims, wherein the first and second coating (3) further comprise ceramic particles (3a). [6] Protection arrangement (1) according to one of the preceding claims, further comprising a pressure relief element (4). [7] Battery cell with a protective arrangement (1) according to one of the preceding claims. [8] A method for producing a battery cell according to claim 7, comprising: - providing a cell housing (2); - Coating an inner side of the cell housing (2), wherein the cell housing and the coating material form a bond which remains deformable. [9] Battery module with a battery cell according to claim 7. [10] Electric machine with a battery module according to claim 9.

Citation Information

Patent Citations

  • Battery shell and battery

    CN219801083U

  • battery module

    DE102016210308A1

  • CN000219801083U