Cover plate assembly, housing and battery

CN224502095UActive Publication Date: 2026-07-14SVOLT ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SVOLT ENERGY TECHNOLOGY CO LTD
Filing Date
2025-07-31
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

In the traditional lithium-ion power battery cell cover structure, the gap between the connecting piece and the lower plastic leads to poor welding and fatigue fracture of the connecting piece, affecting the battery's cycle life and safety performance.

Method used

A support boss is provided on the lower plastic to support the electrode connecting piece to ensure that it is tightly welded to the electrode base plate. The support boss optimizes the assembly relationship between the electrode base plate and the electrode connecting piece, reduces the risk of poor welding, and enhances the stability of the connection.

Benefits of technology

It improves the welding quality of electrode connecting pieces and terminal base plates, reduces defects such as false welds and explosion points, improves battery production yield and reliability, reduces the risk of electrolyte leakage, and enhances the battery's impact resistance and current transmission stability.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224502095U_ABST
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Abstract

The utility model relates to a battery field especially relates to a cover plate subassembly, shell and battery. Cover plate subassembly includes cover plate body, the lower plastic is installed in cover plate body, and the lower plastic forms the support boss, the pole bottom plate is installed in the lower plastic, the electrode connecting piece, the support boss is suitable for supporting in electrode connecting piece to make electrode connecting piece and the welding area compaction of pole bottom plate in pole bottom plate. The support boss in this cover plate subassembly eliminates the gap between electrode connecting piece and pole bottom plate through mechanical jacking, makes the welding surface close fitting, avoids the energy dispersion or the insufficient melting depth caused by the gap when laser welding, reduces the defects such as false welding, false welding. The contact of support boss and electrode connecting piece forms rigid limit, reduces the horizontal sliding or deviation of electrode connecting piece in the assembly process, ensures the accuracy of welding position.
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