A cover plate terminal structure of a power battery

By adopting a mechanical interlocking structure of "T"-shaped terminal post and welding ring in the power battery cover terminal, and utilizing injection molding and multi-directional constraint design of the substrate, the problems of insufficient tensile strength and poor reliability of traditional terminal structures are solved, and the high stability and sealing of the terminal post are achieved.

CN224458520UActive Publication Date: 2026-07-03NANJING SHENGSHI PRECISION IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NANJING SHENGSHI PRECISION IND CO LTD
Filing Date
2025-07-11
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Traditional power battery cover terminal structures have significant defects in terms of insufficient tensile strength, poor long-term reliability, and simple structural constraints. In particular, they are prone to interface peeling and micro-cracks under battery charging, discharging and vibration environments, which can lead to loosening of the terminals and electrolyte leakage.

Method used

The pole is T-shaped, with an outer welding ring and is squeezed together by injection molding. The inner and outer convex rings of the welding ring are engaged with the grooves of the injection molding, and combined with the base plate and brake frame for multi-directional constraint, forming a mechanical interlocking structure.

Benefits of technology

It significantly improves the tensile strength of the pole in the Z-axis direction, enhances the axial stability and reliability of the terminal, solves the problem of zero structural failure in vibration testing of traditional terminals, and ensures sealing performance.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224458520U_ABST
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Abstract

The utility model discloses a cover plate terminal structure of power battery, including the pole, the section shape of pole is " T " character shape, the pole is equipped with the welding ring outward, the pole with through injection molding glue extrusion joint between the welding ring, the bottom of welding ring inner wall is inwards convex and is formed with second convex ring, the top of welding ring is upwards convex and is formed with first convex ring, the outside of injection molding glue is covered joint to first convex ring and second convex ring of it. The first recess and the second recess are set up respectively in the injection molding glue inwards corresponding first convex ring and second convex ring, first recess with first convex ring each other cooperation joint, second recess and second convex ring each other cooperation joint. The base plate is equipped with the welding ring outside, and the base plate is mutually jointed with the welding ring. The application will change the welding ring, the pole structure, makes the pole in Z axle direction all have the constraint upwards / downwards to the improvement pole Z axle direction's tensile strength.
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