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《Journal of Hubei University(Natural Science)》 2018-03
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Reduced-order analysis for the fractional circuit model of automotive lithium ion battery

FANG Di;HUANG Qiuan;YANG Jian;YANG Changping;Faculty of Physics and Electronic Science,Hubei University;School of Computer Science and Information Engineering,Hubei University;  
An improved Randle fractional circuit is proposed to describe the transfer function of a lithiumion battery,and the analytic solution of the step current response is addressed. Then,the reduced order processing is conducted on circuit model containing fractional element R_1//CPE_1 and ZW∞. Simulating results in time domain show that the analyzable solution is very close to approximate solution for the current step response of both Z_(W∞) and R_1//CPE_1. In the time range of 0. 1 10. 0 s,the relative errors are less than 3.0%,and less than 12. 0% for R_1//CPE_1 with α 0. 8. The reduced order model obtained in present work not only reduces the complexity of operation,but also roughly meets with the requirements of control precision.
【Fund】: 国家自然科学基金(11674086);; 教育部留学归国人员科研启动基金((2015)311);; 湖北省教育厅重点项目(D20141003)资助
【CateGory Index】: TM912
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