Aiming at the parameter identification problem, the two order RC equivalent circuit was used to establish the Li-ion battery pack model. The parameters of the model were then preliminarily identified by pulse discharge experiment method. The multiobjective optimization of the parameters was carried out, the optimal parameters were determined. The accuracy of the model was verified by hybrid pulse power characterization(HPPC) test, the charge and discharge characteristics of the Li-ion battery pack could accurately describe by the Li-ion battery pack model. The average error was 0.05 V, the max...
