电动汽车的动力电池模型及其参数辨识

Power Battery Model and Parameter Identification for Electric Vehicle

纯电动汽车正在逐步替代传统能源汽车,对电动汽车充电电池的研究也在不断加深,其中电池模型起着关键的作用。介绍了三类电池模型──电化学机理模型、神经网络模型和等效电路模型,详细分析了PNGV等效电路模型的特点,采用最小二乘法辨识了其主要模型参数,并拟合得到各参数的非线性规律,为动力电池的SOC估算及电动汽车仿真研究提供了理论基础。

Electric vehicles are gradually replace traditional vehicles,research on electric vehicle charging batteries is also growing,and the battery model plays an important role. Three kinds of battery models are introduced━━Electrochemical mechanism model、Neural Network model and equivalent circuit model,the characteristics of PNGV equivalent circuit model are analyzed in detail, then the main parameters of the model are identified according to the principle of least squares, and fitting the nonlinear law of each parameter, which provides a theoretical basis for the SOC estimation of power battery and the simulation of electric vehicle.