Energy storage power station battery consistency evaluation and equalization method and system

By acquiring battery voltage, current, and temperature data in energy storage power stations, and combining equivalent circuit models and Arrhenius formulas, polarization and ohmic voltage drops are eliminated, the open-circuit voltage curve is reconstructed, and consistency is evaluated using the median baseline and the balance weight is calculated. This solves the problems of large battery consistency evaluation errors and ineffective power transfer in existing technologies, and improves the effective usable capacity and safety of battery power stations.

CN122238863BActive Publication Date: 2026-07-24INNER MONGOLIA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INNER MONGOLIA UNIV OF TECH
Filing Date
2026-04-29
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies struggle to accurately assess battery consistency and effectively balance them under dynamic operating conditions in energy storage power stations, resulting in large errors in assessment results and ineffective power transfer, which fails to improve the effective usable capacity and cycle life of battery power stations.

Method used

By acquiring voltage, current, and temperature data of the battery during a complete discharge cycle, and combining the equivalent circuit model and the Arrhenius formula, polarization and ohmic voltage drop are eliminated, the open-circuit voltage curve is reconstructed, consistency is evaluated using the median baseline, and power allocation is performed based on the balance weight calculated according to the relative difference.

Benefits of technology

It enables accurate evaluation of battery consistency under dynamic operating conditions, avoids invalid power transfer, improves the effective usable capacity and long-term operational safety of battery equipment, and ensures safe and reliable energy dispatch within the power station.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a kind of energy storage power station battery consistency evaluation and equalization method and system, it is related to battery management technical field, the voltage curve, current curve and state of charge curve and average temperature in complete discharge cycle are obtained, and the open-circuit voltage curve is obtained by point by point removing polarization pressure drop and ohmic pressure drop in combination with equivalent circuit and Arrhenius formula;The absolute deviation degree of open-circuit voltage curve and standard curve is calculated, and the median of extracted absolute deviation degree is used as baseline, and the consistency is analyzed by the relative difference of baseline and each battery;The relative difference is used as constraint, and the equalization weight is calculated in combination with current state of charge, and equalization power distribution is carried out based on equalization weight.The application constructs a multi-dimensional health evaluation system, and realizes the accurate control of battery safety equalization power rationality.
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