电动汽车锂离子电池集总参数RC等效电路模型

RC equivalent circuit model of lumped parameters for lithium ion batteries in electric vehicles

本项目以纯电动汽车锂离子动力电池集总参数RC等效电路模型为研究对象,在传统模型基础上,考虑了电池的极化效应特性和迟滞电压特性,创建一种新的锂离子动力电池动态等效电路模型;基于实验测试,对该模型参数进行了辨识,并通过实验分析验证,该模型的估算误差为2%,比传统一阶及二阶模型准确,比三阶RC模型简单。

This article studied the RC equivalent circuit model of lumped parameters for lithium-ion batteries in electric vehicles.On the base of the traditional battery models,this research creates a new dynamic equivalent circuit model of lithium-ion power battery considering the polarization effect and hysteresis voltage characteristics of battery.Model’s parameters were identified by tests.The estimated error of this model is 2%through experimental analysis,which is more accurate than the traditional first-order and second-order models and simpler than the third-order RC model.