基于电路暂态分析的功率型动力电池建模  

Modeling research of power-assist battery based on circuit transient analysis

作　　者：王占国[1] 金新民[1] 孙丙香[1] 龚敏明[1] 曹雪铭[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《北京交通大学学报》2012年第2期91-94,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家“863”计划项目资助(2011AA05A108);国家科技支撑计划项目资助(2011BAA07B07)

摘　　要：以混合动力汽车用8Ah功率型锰酸锂电池为对象,选取戴维南电路模型等效开路电压、欧姆内阻和极化阻抗,在室温25℃条件下,分充电方向和放电方向的不同开展建模研究.通过增加放电搁置时间将复合功率脉冲试验进行改进,复合脉冲试验数据采用电路暂态分析和最小二乘的方法辨识,得到极化阻抗时间常数τ,不同充放电方向和不同SOC点的电路元件参数,利用Matlab/Simulink工具建立了电池仿真模型,并采用HPPC试验和变电流试验数据对仿真模型进行了验证.仿真结果表明等效电路模型具有较高的精度,能够准确地模拟锰酸锂电池的动态特性.With an 8Ah power-assist Li-ion battery for hybrid vehicles as the research object,this paper uses Thevenin equivalent circuit model to simulate the open-circuit voltage,ohmic resistance and polarization resistance,and the charging/discharging models are studied at the temperature 25 ℃.By increasing the discharge standing time to improve Hybrid Pulse Power Characterization（HPPC） test,least square method and circuit transient analysis are used to identify parameters.The polarization resistance’s time constant τ and element parameters of charging/discharging tests are obtained at each SOC point.Matlab/Simulink is used to build a battery simulation model which is validated by the data of HPPC test and change-current test.The simulation results show that the Thevenin equivalent circuit model has a high accuracy,and it can simulate the dynamic characteristics of lithium manganese oxide battery accurately.

关 键 词：锰酸锂电池 戴维南模型 复合脉冲试验 暂态分析 最小二乘法 

分 类 号：TM912.4[电气工程—电力电子与电力传动]