Secondary Battery Charging Method and Apparatus

ChangeBridge: EPO Bulletin - Batteries (H01M)

Published March 25th, 2026

Detected April 1st, 2026

Summary

The European Patent Office published patent application EP4195355A1 by Contemporary Amperex Technology (Hong Kong) Limited (CATL) for a secondary battery charging method, charging apparatus, charging device, and computer storage medium. The patent application covers innovations in battery charging technology including methods and apparatus for improved secondary battery charging. The application was published March 25, 2026, and designates 31 European states for protection.

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What changed

The EPO published CATL's patent application EP4195355A1 covering a secondary battery charging method, charging apparatus for secondary battery, charging device, and computer storage medium. The application relates to IPC classifications H01M (batteries) and H02J (charging circuits), with designated states including major European markets such as DE, FR, GB, NL, and IT. The patent holder is Contemporary Amperex Technology (Hong Kong) Limited, a leading battery manufacturer.

This is an informational patent publication notice. No immediate compliance action is required from industry participants. However, companies developing battery charging technology should review the claims to assess potential infringement risks or opportunities for licensing. Competitors may wish to design around these claims or evaluate the technology for potential partnership or acquisition opportunities.

What to do next

Review patent claims to assess potential infringement risks to existing or planned battery charging products
Evaluate whether licensing or cross-licensing opportunities exist with CATL
Consider designing around patent claims if developing similar charging technology

Source document (simplified)

← EPO Patent Bulletin

CHARGING METHOD FOR SECONDARY BATTERY, CHARGING APPARATUS FOR SECONDARY BATTERY, CHARGING DEVICE, AND COMPUTER STORAGE MEDIUM

Publication EP4195355A1 Kind: A1 Mar 25, 2026

Applicants

Contemporary Amperex Technology
(Hong Kong) Limited

IPC Classifications

H01M 10/44 20060101AFI20251118BHEP H01M 10/052 20100101ALI20251118BHEP H02J 7/00 20060101ALI20251118BHEP H01M 4/131 20100101ALI20251118BHEP H01M 4/62 20060101ALI20251118BHEP H01M 4/02 20060101ALN20251118BHEP

Designated States

AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR

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