Metal-clad composite current collector, pole piece, roll core structure, lithium ion battery, and method for improving welding performance of composite current collector tab

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By welding a metal strip to the end of the composite current collector to form a metal edging, and combining laser welding and pretreatment steps, the problem of difficult welding of composite current collectors in lithium-ion batteries was solved, improving welding yield and battery performance.

CN122393316APending Publication Date: 2026-07-14ZHENGZHOU BAK BATTERY CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: ZHENGZHOU BAK BATTERY CO LTD
Filing Date: 2025-09-25
Publication Date: 2026-07-14

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Abstract

The application discloses a metal edge-coated composite current collector, a pole piece, a roll core structure, a lithium ion battery and a method for improving welding performance of a composite current collector tab. The welding performance of the composite current collector and the current collecting disc is improved through metal band edge coating, and the yield of the composite current collector is improved through the mode of welding first and then coating and die cutting, the electrochemical performance and the energy density of the battery are improved, and the safety performance of the battery is improved.

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