Current collector for cylindrical batteries

By designing the overlapping ring and pressure ring structure of the current collector, the problems of high short-circuit rate and insufficient overcurrent capacity caused by the outward flipping of the battery core tabs were solved, thus improving battery performance.

CN224481156UActive Publication Date: 2026-07-10MIANYANG CHUANGMING INTELLIGENT BATTERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
MIANYANG CHUANGMING INTELLIGENT BATTERY CO LTD
Filing Date
2025-05-26
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

During the stamping process, the tabs on the edge of the cylindrical battery core may fold outwards, making them prone to breakage and resulting in high short-circuit rate and insufficient overcurrent capacity.

Method used

A current collector structure was designed, including an overlap ring and a pressure ring. The overlap ring has a recessed area and a groove inside. The pressure ring is tightly fitted and welded to the edge tab of the battery core. The recessed area is flush with the pressure ring and presses down the middle tab. The connection is made by laser welding to increase the current flow area and prevent the tab from flipping outward.

Benefits of technology

It effectively prevents the tabs from flipping outward, increases the current-carrying area, improves the current-carrying capacity of the battery core, and ensures that the battery performance meets the requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to cylindrical battery technical field provides a current collecting disc of cylindrical battery, include: disc body, have the lap joint ring and be located in the sunken area of lap joint ring inside, and the compression ring, wherein, the compression ring is closely attached to the back of lap joint ring, is used for pressing the pole ear of battery roll core edge portion and welds with it, the back of sunken area is protruding from the back of lap joint ring and is flush with the side of compression ring towards battery roll core, is used for pressing the pole ear of battery roll core middle part and welds with it. Through the compression ring presses the pole ear of battery roll core edge portion and welds with it, not only can prevent the quality defect caused by the battery roll core edge pole ear everted in a series, and their contact can increase the overcurrent area, improves the overcurrent capacity of battery roll core, thereby ensures that the battery performance meets the requirements.
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