电流输入电动汽车电池等效电路模型的比较

COMPARISON OF CURRENT INPUT EQUIVALENT CIRCUIT MODELS OF ELECTRICAL VEHICLE BATTERY

基于电动汽车系统仿真的研究需要,提出两个非线性等效电路电池模型:GNL模型和CR模型。为了评价 两个模型的性能,以320单体串联的80 Ah镍氢电池组为研究对象,基于同一组复合脉冲试验数据,应用多元线 性回归方法同时辨识Rint模型、Thevenin模型、PNGV模型、GNL模型和CR模型的参数,进而建立各等效电路 模型基于MATLAB／Simulink的电流输入仿真模型,使用26．67 A恒流放电和FUDS工况试验数据来验证模型精 度。模型计算结果与试验数据的误差表明,电流输入等效电路模型中,PNGV模型和GNL模型更适用于电动汽 车仿真,GNL模型具有更好的精度。

Required by electric vehicle system simulation, two equivalent circuit battery models named GNL model and CR model are proposed. To validate these two models, a comparison study between five models including another three often used models named Rint model, Thevenin model and PNGV model are conducted. Model parameters of five models are all obtained by performing a multiple linear regression on the hybrid pulse test data of an 80 Ah Ni-MH battery pack with 320 cells in series. Current input models in vehicle simulation environment of these five models are realized by MATLAB/ Simulink with the obtained model parameters. A 26.67 A constant current discharge test and a 1 372 s FUDS test are used to validate and compare models＇ performance. Compared with voltage error between simulation result and test data, it is concluded that PNGV model and GNL model are more suitable for electrical vehicle system simulation and GNL model done better.