USPTO Patent 12586825B2 Granted for Negative-Electrode Plate

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 24th, 2026

Detected March 26th, 2026

Summary

The USPTO has granted US Patent 12586825B2 to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED for a negative-electrode plate. The patent covers a specific design intended to inhibit lithium dendrites in secondary batteries, potentially improving battery safety and performance.

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What changed

The United States Patent and Trademark Office (USPTO) has granted US Patent 12586825B2 for a negative-electrode plate, its preparation method, and related battery components. The patent, assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, details a negative-electrode plate comprising an alkali metal layer and a polymer film layer. This design aims to inhibit lithium dendrite formation in secondary batteries by controlling the polymer film layer's surface resistivity.

This patent grant is primarily informational for manufacturers in the battery and electric apparatus sectors. While it does not impose new regulatory obligations or compliance deadlines, it signifies a new intellectual property protection for a specific battery technology. Companies operating in battery development, particularly those using or developing similar negative-electrode plate technologies, should be aware of this patent to avoid potential infringement issues.

Source document (simplified)

← USPTO Patent Grants

Negative-electrode plate, preparation method thereof, and secondary battery, battery module, battery pack, and electric apparatus containing same

Grant US12586825B2 Kind: B2 Mar 24, 2026

Assignee

CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

Inventors

Bobing Hu, Shengyuan Huang, Chengyong Liu, Jiawei Fu, Xiaoning He, Jieliang Zou, Chengbin Zhong

Abstract

A negative-electrode plate, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an electric apparatus including such negative-electrode plate are provided. The negative-electrode plate includes an alkali metal layer and a polymer film layer provided on at least one surface of the alkali metal layer. Surface resistivity of the polymer film layer gradually increases in a thickness direction of the polymer film layer away from the alkali metal layer. When the negative-electrode plate is used in a secondary battery, lithium dendrites can be effectively inhibited.