A battery state of charge estimation method using sliding mode observer

In this paper, a simplified battery model and a closed-loop estimation method of the state of charge (SOC) are proposed. The simplified battery model consists only of two resistors and two capacitors, based on which a sliding mode observer is designed to compensate modeling errors when the SOC is es...

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Bibliographic Details
Published in2008 7th World Congress on Intelligent Control and Automation pp. 989 - 994
Main Authors Fei Zhang, Guangjun Liu, Lijin Fang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2008
Subjects
Batteries
Battery
Estimation
Estimation error
Mathematical model
Robots
sliding mode observer
state estimation
state of charge
System-on-a-chip
Voltage measurement
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ISBN1424421136
9781424421138
DOI10.1109/WCICA.2008.4593055

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Summary:In this paper, a simplified battery model and a closed-loop estimation method of the state of charge (SOC) are proposed. The simplified battery model consists only of two resistors and two capacitors, based on which a sliding mode observer is designed to compensate modeling errors when the SOC is estimated. The proposed method can overcome the drawbacks of the conventional SOC estimation methods, such as large cumulative errors. And it is simple and robust to modeling errors. The effectiveness of the proposed method is verified experimentally on a test bench and a power transmission line inspection robot. The experimental results show that the proposed method is effective and can estimate battery SOC.
ISBN:1424421136
9781424421138
DOI:10.1109/WCICA.2008.4593055