Metal shell square battery safety valve exhaust hole sealing boss structure

By setting a sealing boss structure at the vent of the nickel-metal hydride battery, and installing rivets and rivet pads in a nested and insulated manner, the problem of alkali creep caused by electrolyte penetration is solved, thereby improving the battery's sealing performance and lifespan.

CN224554606UActive Publication Date: 2026-07-24FUJIAN WEIDONG NEW ENERGY
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Patent Information

Application Number
CN202521609117.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-30
Publication Date
2026-07-24
Estimated Expiration
2035-07-30

AI Technical Summary

Technical Problem

The vent holes in existing nickel-metal hydride batteries are formed by drilling holes directly on the outer casing. This causes positive ions in the electrolyte to flow out along the vent hole protrusions, resulting in alkali creep, which affects battery life and appearance. Furthermore, the high temperature of the riveting process damages the sealing performance.

Method used

The sealed boss structure is adopted, which is installed in the vent hole by rivets and rivet pads. The sealing boss is formed by press riveting process. The rivets are insulated from the battery shell to enhance the sealing effect.

Benefits of technology

It effectively avoids alkali creep caused by electrolyte penetration, improves battery life, and ensures sealing performance through a simple and reliable riveting process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of metal shell square battery safety valve exhaust hole sealing boss structure.It relates to new energy battery parts technical field.Its structure includes sealing boss, battery metal shell, safety valve exhaust hole being set on battery shell.Sealing boss includes rivet and rivet pad, and rivet and rivet pad are nested installation in exhaust hole.Downward pressing is carried out to the rivet using press riveting process, and the rivet and the rivet pad form sealing boss, so that it is tightly covered the exhaust hole, and rivet and battery metal shell are insulated and isolated.The utility model sets sealing boss in safety valve exhaust hole, and exhaust passage and battery metal shell are insulated and isolated, and sealing boss of press riveting forming enhances sealing effect, effectively avoids the case that the phenomenon of alkaline climbing caused by the liquid phase penetration of existing nickel-metal hydride battery exhaust hole is electrified, improves battery service life.
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