GS Yuasa Granted US Patent for Lead-Acid Battery

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 24th, 2026

Detected March 25th, 2026

Summary

The USPTO has granted US Patent US12586821B2 to GS Yuasa International Ltd. for a novel valve-regulated lead-acid battery. The patent, effective March 24, 2026, details specific compositions for negative and positive electrode materials and electrolyte solutions.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12586821B2 to GS Yuasa International Ltd. This patent, effective March 24, 2026, covers a valve-regulated lead-acid battery. The invention specifies unique properties for the negative electrode material, including a polymer compound with a specific 1H-NMR spectrum peak range or a repeating oxy C2-4 alkylene unit structure. It also defines density parameters for the positive electrode material.

This patent grant is primarily an intellectual property event for GS Yuasa. For manufacturers in the battery sector, particularly those producing lead-acid batteries, this patent may influence future research and development or necessitate licensing agreements if their technologies overlap with the patented claims. No immediate compliance actions are required for other entities, but awareness of this patented technology is advisable for competitive and legal reasons.

Source document (simplified)

← USPTO Patent Grants

Lead-acid battery

Grant US12586821B2 Kind: B2 Mar 24, 2026

Assignee

GS Yuasa International Ltd.

Inventors

Yuri Kitada, Kazuki Sekiya

Abstract

A valve regulated lead-acid battery includes at least one cell including an element and an electrolyte solution. The element includes a negative electrode plate, a positive electrode plate, and a separator interposed between the negative electrode plate and the positive electrode plate. The negative electrode plate includes a negative electrode material. The negative electrode material contains a polymer compound having a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of a 1H-NMR spectrum measured using deuterated chloroform as a solvent, or contains a polymer compound having a repeating structure of oxy C2-4 alkylene units. The positive electrode plate includes a positive electrode material. A density of the positive electrode material is 3.70 g/cm3 or more and 4.65 g/cm3 or less.