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State of Charge Estimator using Sliding Mode Observer for Hybrid Electric Vehicle Lithium Battery  

Kim, Il-Song (충주대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.12, no.4, 2007 , pp. 324-331 More about this Journal
Abstract
This paper studies new estimation method for state of charge (SOC) of the hybrid electric vehicle lithium battery using sliding mode observer. A simple R-C Lithium battery modeling technique is established and the errors caused by simple modeling was compensated by the sliding mode observer. The structure of the sliding mode observer is simple, but it shows robust control property against modeling errors and uncertainties. The performance of the system has been verified by the UUDS test. The test results of the proposed observer system shows robust tracking performance under real driving environments.
Keywords
battery modeling; hybrid electric vehicle; sliding mode observer; state of charge estimation; SOC;
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