Negative electrode piece and secondary battery including same

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 31st, 2026

Detected March 31st, 2026

Summary

CosMX Battery received USPTO Patent Grant US12592388B2 for a negative electrode piece with improved lithium-ion battery performance. The patent covers a polymer-based electrode designed to enhance lithium ion transmission and reduce internal resistance. The 6-claim patent (application 18065619) names seven inventors from Zhuhai CosMX Battery Co., Ltd.

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What changed

Zhuhai CosMX Battery Co., Ltd. received US Patent US12592388B2 for a negative electrode piece with improved lithium-ion battery performance. The invention replaces existing electrode polymers with a high-elasticity, high-extensibility polymer that enhances lithium ion transmission and reduces internal resistance. The patent includes 6 claims covering the electrode composition and structure, application number 18065619, filed December 13, 2022.

This patent grant does not impose compliance obligations or deadlines on third parties. Companies developing lithium-ion battery technology should review this patent for freedom-to-operate implications and potential licensing considerations. The patent holder gains enforceable rights to exclude others from making, using, or selling the claimed invention.

Source document (simplified)

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Negative electrode piece and secondary battery including same

Grant US12592388B2 Kind: B2 Mar 31, 2026

Assignee

Zhuhai CosMX Battery Co., Ltd.

Inventors

Weichao Tang, Suli Li, Wei Zhao, Hao Yuan, Chunyang Liu, Junyi Li, Yanming Xu

Abstract

A negative electrode piece and a secondary battery including the same. A type of polymer different from that in the prior art is selected as a component in the negative electrode piece, the polymer has high elasticity, high extensibility, can replace the polymer in the existing negative electrode piece, and can effectively improve and enhance the transmission performance of lithium ions and reduce the internal resistance of the lithium-ion battery. At the same time, it can effectively reduce side reactions caused by the expansion of the negative electrode piece, improve lithium conductive channels inside the negative electrode piece, and improve battery performance of the negative electrode piece during the battery cycling.