锂离子电池模型参数辨识研究  

Research on Model Parameter Identification of Lithium Ion Battery

作　　者：朱启煌 陈伊韵 张爽 舒开鑫 方宇[1] 

机构地区：[1]扬州大学信息工程学院(人工智能学院),江苏 扬州 [2]扬州大学电气与能源动力工程学院,江苏 扬州

出　　处：《电路与系统》2023年第2期9-19,共11页Open Journal of Circuits and Systems

摘　　要：由于汽车工况的变化,汽车动力电池组的结构系数也相应出现了非线性改变。为对此类非线性电池组件实现高效控制,本文选用了二阶RC模型作为电池的等效电路模型,并采用了电池的恒流充放电试验、开路电压和荷电状态的标定试验来获得电池的相关数据,在MATLAB中辨识二阶RC模型的相关参数。该模型利用放电电流、开路电压等物理量,辨识出电池的内部结构参数、荷电状态等特性,方便对电池组进行管理。通过MATLAB/Simulink软件中搭建模型进行仿真,验证了等效电路模型可以精确模拟实际电池。Due to the change in automobile working conditions, the structure coefficient of automobile power battery pack also appears to nonlinear change. In order to realize efficient control of such nonlinear battery components, this paper chooses the second-order RC model as the equivalent circuit model of the battery, and uses the constant current charge-discharge test of the battery, the calibration test of open circuit voltage and charge state to obtain the relevant data of the battery, and identifies the relevant parameters of the second-order RC model in MATLAB. The model uses discharge current, open circuit voltage and other physical quantities to identify the internal structural parame-ters of the battery, the state of charge and other characteristics, so as to facilitate the management of the battery pack. Through the simulation of the model built in MATLAB/Simulink software, it is verified that the equivalent circuit model can accurately simulate the actual battery.

关 键 词：荷电状态 开路电压 锂离子电池 电池组件 等效电路模型 放电电流 动力电池组 结构系数 

分 类 号：TM9[电气工程—电力电子与电力传动]