一种可拆卸用于排气补液的盖帽

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By designing a detachable cap structure and utilizing the combination of threaded sections and flange caps, the problem of venting after lithium battery assembly was solved, enabling detachable venting and sealing of the battery, thus extending its service life.

CN224520143UActive Publication Date: 2026-07-17CHANGZHOU WUJIN ZHONGRUI ELECTRONICS

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CHANGZHOU WUJIN ZHONGRUI ELECTRONICS
Filing Date: 2025-07-25
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

The inability to vent the gas after lithium battery assembly leads to a problem where the internal pressure of the battery affects its lifespan.

Method used

A detachable cap was designed, comprising an explosion-proof plate and a rubber rivet. The rubber rivet includes a threaded section and a flange cover. The threaded section is inserted into the inner stepped hole through an interference fit to achieve a detachable seal of the exhaust channel.

Benefits of technology

This design enables the battery venting channel to be detachable during use, reducing the risk of adhesive pins coming loose, ensuring battery sealing, and extending battery life.

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Abstract

本实用新型涉及锂电池技术领域，具体是一种可拆卸用于排气补液的盖帽，包括防爆片、排气通道和胶钉，所述防爆片上开设有排气通道，所述排气通道包括靠近电池内部的内台阶孔和靠近电池外部的外台阶孔，所述内台阶孔的内壁处形成为内螺纹，所述胶钉配合在所述排气通道内，所述胶钉包括螺纹段和形成在所述螺纹段一端的法兰盖，所述螺纹段的段身从远离所述法兰盖开始逐渐收窄，所述螺纹段过盈配合插入所述内台阶孔直至所述法兰盖压合在所述内台阶孔和外台阶孔的过渡端面上。解决了电池组装后无法排气、电池寿命受限的技术问题。

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Claims

1. A cap that is detachable for venting and liquid replenishment, characterized in that, include: An explosion-proof sheet (1) is provided with an exhaust channel (2); The exhaust channel (2) includes an inner stepped hole (21) near the inside of the battery and an outer stepped hole (22) near the outside of the battery. The inner wall of the inner stepped hole (21) is formed with an internal thread. A plastic nail (3) fits into the venting channel (2). The plastic nail (3) includes a threaded section (31) and a flange cover (32) formed at one end of the threaded section (31). The section of the threaded section (31) gradually narrows from away from the flange cover (32). The threaded section (31) is inserted into the inner stepped hole (21) with an interference fit until the flange cover (32) is pressed against the transition end face of the inner stepped hole (21) and the outer stepped hole (22).

2. The cap of claim 1, wherein, The threaded section (31) is first coated with glue and then screwed into the inner stepped hole (21).

3. The cap of claim 1, wherein, The plastic nail (3) is made of one piece of plastic material.

4. The cap of claim 3, wherein, A sleeve fixture with a shape matching the flange cover (32) is fitted onto the flange cover (32) of the rubber nail (3) so as to screw the rubber nail (3) through the sleeve fixture.

5. The cap of claim 4, wherein, The flange cover (32) has a flat stress-bearing part formed in the circumference.

6. The detachable cap for venting and replenishing fluid according to claim 1, characterized in that, The explosion-proof sheet (1) is made of aluminum stamping, and the internal thread in the inner stepped hole (21) is formed by extrusion tap.