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Rechargeable Lithium Ion Button Cell Battery

Patent No. EP3477729 (titled "Rechargeable Lithium Ion Button Cell Battery") was filed by Zhuhai ZHI LI Battery on Mar 10, 2014. The application was issued on Oct 29, 2025.

Patent Summary

A rechargeable lithium-ion button cell battery with improved reliability and longer cycle life, featuring a novel electrode connection method that prevents exposure of metal surfaces to the electrolyte. The cathode tab is connected to the outer casing through a metal flake, which is then covered by a washer to prevent short circuits. This design eliminates the risk of lithium ions accumulating on exposed metal surfaces, thereby preventing battery short circuits and extending cycle life.

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VARTA MICROBATTERYSep 25, 2020OSTERTAG & PARTNER PATENTANWALTE MBB

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EP3477729

ZHUHAI ZHI LI BATTERY
Application Number
EP18208740A
Filing Date
Mar 10, 2014
Status
Patent Maintained As Amended
Sep 26, 2025
Publication Date
Oct 29, 2025
External Links
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