Cylindrical battery and electric device

By inserting and fixing a support tube into the center hole of the cylindrical battery core, the problem of hole collapse was solved, stable support was achieved, abnormal noise was reduced, and the safety and service life of the battery were improved.

CN224304696UActive Publication Date: 2026-05-29BEIJING WELION NEW ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
BEIJING WELION NEW ENERGY TECH CO LTD
Filing Date
2025-04-21
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

After repeated charging and discharging, cylindrical batteries are prone to developing a collapsed hole in the center of the core, which can cause the support tube to collide with the core, resulting in abnormal noise and posing a safety hazard.

Method used

A support tube is inserted into the center hole of the core and fixedly connected to the bottom cover. The support tube includes a straight tube section and a tapered tube section. The straight tube section is fixed to the bottom cover, and the tapered tube section is inserted into the center hole of the core. A sealing structure is provided to prevent electrolyte leakage, and it is sealed to the bottom cover through a flange. The support tube is made of thermally conductive material to conduct heat.

Benefits of technology

The support tube provides stable support to the core, preventing collapse, reducing abnormal noise, improving battery safety, and extending service life.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224304696U_ABST
    Figure CN224304696U_ABST
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Abstract

The present disclosure relates to the field of batteries, and provides a cylindrical battery and an electric device, the cylindrical battery comprising a winding core with a center hole, a bottom cover arranged at an axial end of the winding core, and a support tube, the support tube passing through the bottom cover and being inserted into the center hole, and the support tube being fixedly connected to the bottom cover. Through the above technical solution, the support tube can stably support the winding core, prevent the winding core from collapsing into the center hole during use of the battery, and the bottom cover can provide support for the support tube, which can avoid or reduce movement of the support tube relative to the winding core, reduce abnormal sound, and thus improve the safety of the battery and prolong the service life of the battery.
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