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Modeling and Characteristic Analysis of HEV Li-ion Battery Using Recursive Least Square Estimation  

Kim, Ho-Gi (Hybrid Vehicle Development Division, Hyundai Motor Company)
Heo, Sang-Jin (Hybrid Vehicle Development Division, Hyundai Motor Company)
Kang, Gu-Bae (Hybrid Vehicle Development Division, Hyundai Motor Company)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.17, no.1, 2009 , pp. 130-136 More about this Journal
Abstract
A lumped parameter model of Li-ion battery in hybrid electric vehicle(HEV) is constructed and system parameters are identified by using recursive least square estimation for different C-rates, SOCs and temperatures. The system characteristics of pole and zero in frequency domain are analyzed with the parameters obtained from different conditions. The parameterized model of Li-ion battery indicates highly dependant of temperatures. The system pole and internal resistance changes 6.6 and 18 times at $-20^{\circ}C$, comparing with those at $25^{\circ}C$, respectively. These results will be utilized on constructing model-based state observer or an on-line identification and an adaptation of the model parameters in battery management systems for hybrid electric vehicle applications.
Keywords
Hybrid electric vehicle; Li-ion battery; BMS; Least square method; SOC; C-rate; Pole; Zero;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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