Real-time OCV and Capacity Estimation Algorithm for Reusable Lithium-ion Battery without Pre-experiment

This paper proposes real-time open circuit voltage (OCV) and capacity estimation algorithm without the initial state of the battery. The proposed algorithm estimates components of the equivalent circuit model (ECM) through the sum of square regression and obtains real-time OCV curve using the ECM vo...

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Bibliographic Details
Published in2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia) pp. 1579 - 1584
Main Authors Lim, Jong-Hun, Lim, Je-Yeong, Lee, Hyeon-Ho, Han, Eui-Seong, Kim, Dong Hwan, Kuk Lee, Byoung
Format Conference Proceeding
LanguageEnglish
Published The Korean Institute of Power Electronics 22.05.2023
Subjects
Asia
Estimation
Lithium-ion battery
open circuit voltage
Power electronics
Real-time systems
reusable battery
Simulation
state of charge
Time series analysis
Voltage
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Summary:This paper proposes real-time open circuit voltage (OCV) and capacity estimation algorithm without the initial state of the battery. The proposed algorithm estimates components of the equivalent circuit model (ECM) through the sum of square regression and obtains real-time OCV curve using the ECM voltage relationship and Coulomb counting method. The feasibility of the proposed algorithm has been demonstrated by simulation based on a lithium nickel manganese cobalt battery. Verification results show high accuracy of the OCV curve as the cycle repetition even though internal parameters of the battery are not provided.
ISSN:2150-6086
DOI:10.23919/ICPE2023-ECCEAsia54778.2023.10213593