Apparatus and method for calibrating soh

The SOH correction device addresses the inaccuracy in SOH estimation by analyzing multiple battery data sets to reflect changing OCV-SOC relationships, improving accuracy and reliability of battery health assessment.

WO2026116728A1PCT designated stage Publication Date: 2026-06-04LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Filing Date
2025-09-24
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Conventional Battery Management Systems (BMS) fail to accurately estimate State of Health (SOH) due to the distortion of the OCV-SOC relationship caused by battery degradation, leading to inaccurate SOH and driving range estimation.

Method used

A SOH correction device and method that analyzes a plurality of battery data sets to determine SOH correction information by reflecting the changing OCV-SOC relationship, using a processor to extract reference values, generate correction profiles, and apply sequential corrections based on various parameters such as charge/discharge start/end SOC and temperature.

Benefits of technology

Improves the accuracy of SOH estimation by reflecting battery degradation through sequential corrections, stabilizing SOH trends and enhancing the reliability of battery condition assessments.

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Abstract

An apparatus for calibrating an SOH according to an embodiment of the present invention comprises: a data acquisition unit configured to obtain a plurality of battery data sets from at least one electric vehicle, each of the plurality of battery data sets including a charge / discharge event data set and an SOH associated with each other; and a processor configured to determine SOH calibration information on the basis of a plurality of charge / discharge event data and a plurality of SOHs included in the plurality of battery data sets.
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