Electrochemical device and electrical apparatus

By using the welding connection between the flange and the second shell in the lithium-ion battery to form a spacing, the problems of complex battery sealing process and low space utilization are solved, the yield and energy density of the battery are improved, and the process is simplified. And reduce costs.

WO2025001417A1PCT designated stage expired Publication Date: 2025-01-02ZHUHAI COSMX BATTERY CO LTD
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Patent Information

Application Number
PCT/CN2024/087067
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-29
Filing Date
2024-04-10
Publication Date
2025-01-02

AI Technical Summary

Technical Problem

The high positioning accuracy requirements during the welding process of existing lithium-ion battery sealing nails, resulting in low battery yield, low space utilization, high material cost and complex process.

Method used

Using an electrochemical device design including the first shell and the second shell, the space is formed through the welding connection between the flange edge and the second shell, simplifying the liquid injection and sealing process, reducing dependence on positioning nails, and improving the quality of the battery. rate and energy density.

Benefits of technology

The high yield rate and energy density of the battery are achieved, the material cost and process complexity are reduced, the sealing process is simplified, and the electrolyte spillage and contamination are avoided.

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Abstract

Provided in the present application are an electrochemical device and an electrical apparatus. The electrochemical device comprises a first casing, which comprises a recessed part and a flange edge arranged at a circumferential edge of the recessed part; a second casing, which shields an opening of the recessed part and is fixedly connected to the flange edge, the recessed part and the second casing defining an accommodation cavity; and an electrode assembly, which is arranged on the first casing, wherein the flange edge and the second casing are connected via a first structure, and a gap is provided between a first end and a second end of the first structure. The electrochemical device further comprises a second structure, the projection of the second structure in a first direction of the first casing covering the gap. Using the technical solution of the present application can effectively solve the problems in the prior art of complex battery production processes, an electrolyte being prone to overflow during formation processes, and high yields of defective batteries.
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Citation Information

Patent Citations

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    CN116632470A

  • Battery

    CN215070170U

  • Battery

    CN215119060U

  • Battery cell, battery and electric device

    CN216750092U

  • Battery

    CN217062315U