Lithium secondary battery and method of replenishing electrolyte

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 31st, 2026

Detected March 31st, 2026

Summary

USPTO granted Patent No. US12592463B2 to SK On Co., Ltd. for a lithium secondary battery design with an integrated electrolyte storage unit for replenishment. The patent contains 18 claims covering the electrolyte storage unit design with offset first and sub-unit holes. Inventors include Chang Mook Hwang, Hee Soo Na, Ga Yeong Yoo, and Moo Hyung Lee.

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What changed

USPTO granted SK On Co., Ltd. Patent No. US12592463B2 covering a lithium secondary battery with an electrolyte storage unit designed to supply supplementary replenishment. The electrolyte storage unit comprises a first unit with a tubular body and first holes, and a sub-unit with offset sub-holes inserted within the first unit. The patent contains 18 claims and was filed December 9, 2022 under Application No. 18063750.

This is a patent grant notice, not a regulatory action imposing obligations. No immediate compliance actions are required. Technology companies and battery manufacturers developing similar electrolyte replenishment technologies should review the patent claims to assess potential infringement risks and may consider licensing discussions with SK On if pursuing similar designs.

Source document (simplified)

← USPTO Patent Grants

Lithium secondary battery and method of replenishing electrolyte in lithium secondary battery

Grant US12592463B2 Kind: B2 Mar 31, 2026

Assignee

SK On Co., Ltd.

Inventors

Chang Mook Hwang, Hee Soo Na, Ga Yeong Yoo, Moo Hyung Lee

Abstract

A lithium secondary battery includes an electrode assembly including a cathode and an anode facing the cathode, a case accommodating the electrode assembly, an electrolyte accommodated in the case together with the electrode assembly, and an electrolyte storage unit inserted into the case to supply a supplementary replenishment. The electrolyte storage unit includes a first unit including a first body having a tubular structure and first holes formed through the first body, and a sub-unit including a tubular body and sub-holes formed through the tubular body. The sub-unit is inserted into the first unit so that the sub-holes are offset from the first holes.