A top cover sheet structure and a forming device thereof

By setting a support part in the top cover sheet structure and using a molding device for bending, the problem of uneven plastic flow during the injection molding process of the top cover sheet structure is solved, and the connection strength and sealing performance between the pole and the top cover sheet are improved.

CN224481038UActive Publication Date: 2026-07-10ZHEJIANG ZHONGZE PRECISION TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG ZHONGZE PRECISION TECHNOLOGY CO LTD
Filing Date
2025-07-22
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

The existing top cover structure lacks internal support during injection molding, resulting in uneven plastic flow, which can easily lead to shrinkage defects and unreliable connection between the pole and the top cover, posing a risk of electrical connection failure and seal damage.

Method used

A support section is provided in the top cover structure. The support section is evenly distributed on the annular truncated cone along the central axis and forms an inclined angle with the annular truncated cone. The support section is bent by a molding device to improve the contact area and connection strength between the plastic and the pole.

Benefits of technology

It enhances the connection strength between the plastic body and the terminal post, reduces the phenomenon of unreliable connection between the terminal post and the top cover plate, and improves the reliability and sealing of the battery cover.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224481038U_ABST
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Abstract

The utility model provides a kind of top cover piece structure and its forming device, comprising: cover, the assembly hole is set up on the cover, the center axis is built on the assembly hole;Annular circular table, the annular circular table is set on the cover, and with the coaxial center axis of the assembly hole;Support part, the support part is along the center axis annular even portion and is set on annular circular table, and the support part and the annular circular table form inclination angle.The utility model provides a kind of top cover piece structure and its forming device, cover is the top cover piece in power battery cover plate, in the assembly process, pole post is placed in assembly hole and carries out filling plastic colloid, plastic colloid is covered between pole post and annular circular table along support part in injection molding process, utilize support part to improve the support area and plastic strength of plastic colloid, reduce the phenomenon that pole post and top cover piece are not reliably connected.
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