Nonaqueous electrolyte secondary battery

By designing a second separator with lower load resistance in a non-aqueous electrolyte secondary battery and strengthening its rib structure, the problem of separator deformation during the injection process was solved, achieving stability of the electrode body and smooth battery manufacturing.

CN120854681APending Publication Date: 2025-10-28PRIME PLANET ENERGY & SOLUTIONS INC
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Patent Information

Application Number
CN202510452954.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-04-25
Filing Date
2025-04-11
Publication Date
2025-10-28

AI Technical Summary

Technical Problem

During the electrolyte injection process of a secondary battery, the separator deforms due to the weight of the electrode assembly, affecting the battery manufacturing process.

Method used

A non-aqueous electrolyte secondary battery is designed, which uses a second separator with low load resistance. A rib structure is provided on the second wall to control the deformation mode and suppress the deformation of the separator.

Benefits of technology

The deformation of the separator during the injection process is effectively suppressed, ensuring the stability of the electrode body and the smooth progress of battery manufacturing.

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Abstract

A non-aqueous electrolyte secondary battery (1) disclosed herein has a case main body (10), a first sealing plate, a second sealing plate (20B), an electrode body (30), and an electrolyte. Furthermore, in a space between the second sealing plate and the electrode body, a second separator (40B) for supporting the electrode body from below when the electrolyte is injected is disposed. The second spacer is provided with a pair of first wall portions (41) and a pair of second wall portions (42). The second spacer is configured such that the load resistance of the second wall section (42) is lower than the load resistance of the first wall section (41). As a result, the deformation pattern of the second spacer can be controlled so as to generate deformation starting from the second wall section (42). The second spacer (40B) is provided with a rib that crosses and connects the pair of second wall sections (42). As a result, the second wall portion (42) can be reinforced, and deformation of the second spacer (40B) can be suppressed.
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Citation Information

Patent Citations

  • Batteries, battery modules, battery packs and automobiles

    JP2023502461A