USPTO Patent Granted for Battery Management Apparatus

ChangeBridge: Patent Grants - Power Supply (H02J)

Published March 24th, 2026

Detected March 25th, 2026

Summary

The USPTO has granted a patent (US12584971B2) for a battery management apparatus, method, and system to VEHICLE ENERGY JAPAN INC. The patent covers technology for calculating state of charge, deterioration degrees, and remaining capacity of batteries.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12584971B2 for a battery management apparatus, method, and energy storage system. The patent, assigned to VEHICLE ENERGY JAPAN INC., details a system that calculates the state of charge (SOC), charge deterioration degree (SOHQ), and corrected resistance deterioration degree (SOHR) of a battery. It further describes methods for calculating remaining capacity and available energy based on these parameters.

This patent grant is primarily an informational event and does not impose new regulatory obligations on companies. However, it may impact companies operating in the battery technology and electric vehicle sectors by potentially influencing future product development and intellectual property landscapes. Compliance officers should note this as a development in the technological landscape relevant to their industry.

Source document (simplified)

← USPTO Patent Grants

Battery management apparatus, battery management method, and battery energy storage system

Grant US12584971B2 Kind: B2 Mar 24, 2026

Assignee

VEHICLE ENERGY JAPAN INC.

Inventors

Fanny Matthey, Ryohhei Nakao, Kei Sakabe, Hironori Sasaki

Abstract

A battery management apparatus 102 calculates a state of charge SOC representing the state of charge of a chargeable and dischargeable battery, a charge deterioration degree SOHQ and a resistance deterioration degree SOHR, corrects the calculated SOHR, corrects an mid resistance MidDCR corresponding to a mid voltage MidVoltage according to a correction coefficient in accordance with SOHR for MidDCR (corrected SOHR), calculates MidVoltage (a mid voltage present between a discharge voltage in the current state of charge of the battery, and a voltage value representing a discharge voltage in the minimum state of charge of the battery), calculates the remaining capacity of the battery based on SOC and SOHQ, and calculates the available energy of the battery based on the mid voltage and the remaining capacity.

CPC Classifications

G01R 31/392 G01R 31/367 G01R 31/374 G01R 31/387 G01R 31/389 G01R 31/382 H01M 10/44 H01M 10/48 H01M 10/425 H01M 10/42 H01M 2010/4271 H02J 7/0048 H02J 7/00716 H02J 7/007182 H02J 7/007192 Y02E 60/10