odeling and simulation of lithium battery based on
second order Thevenin model
1. Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, Hubei 430070, China; 2. Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan, Hubei 430070, China
Abstract：Several typical battery models were introduced, and the second order Thevenin model was selected as research object. The performance test of lithium battery was carried out, and the hybrid pulse power characteristic (HPPC) test was used to identify the parameters of battery model. With Matlab/cftool, the experimental data were polynomial fitted. In Matlab/Simulink, the simulation model was built and simulated. Through the comparison of simulation and test results, the validity of lithium battery model parameter identification was verified. The reason for the increase of simulation error was analyzed, and the method to improve the accuracy of battery model parameters was proposed. The results show that the model can accurately describe the external characteristics of lithium battery under different working conditions, and the simulation error is increased with the decreasing of state of charge (SOC). When the SOC<0.2, the simulation error is increased obviously.
闫回想, 甘小燕, 武鸿辉, 刘岸晖. 基于二阶Thevenin模型的锂电池建模仿真[J]. 江苏大学学报（自然科学版）, 2018, 39(4): 403-408.
YAN Hui-Xiang, GAN Xiao-Yan, WU Hong-Hui, LIU An-Hui. odeling and simulation of lithium battery based on
second order Thevenin model[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2018, 39(4): 403-408.
2018, Vol. 39 
