基于二阶RC模型电池交流内阻特性分析  

Characteristic of AC Internal Resistance Based on Second-order RC Model

作　　者：王群 刘增辉 王嘉骥 王滢 徐静[2] WANG Qun;LIU Zeng-hui;WANG Jia-ji;WANG Ying;XU Jing(Hebei Petroleum University of Technology, Chengde 067000, Hebei, China;Chengde Medical University, Chengde 067000, Hebei, China)

机构地区：[1]河北石油职业技术大学,河北承德067000 [2]承德医学院,河北承德067000

出　　处：《承德石油高等专科学校学报》2022年第3期52-57,共6页Journal of Chengde Petroleum College

基　　金：承德医学院2019年度教育科学研究课题:20190068.

摘　　要：依据二阶RC电池等效电路模型以及对其进行参数辨识,建立二阶RC模型阻抗与电池交流内阻的关系模型。对不同类型电池进行实验验证发现:电池交流内阻随不同SOC(State of Charge,SOC)区间变化与当前状态二阶RC模型阻抗值有一定的关系,通过对调整因子K的调节,得到表征交流内阻与RC模型阻抗之间关系的补偿函数且其符合指数分布规律,通过数据拟合补偿函数R-square值高于93%。According to the battery equivalent circuit model of second-order RC and its parameter identification,the relationship between impedance of second-order RC model and AC internal resistance of the battery is established.Through experiments with different types of batteries,we find that the battery AC internal resistance varies with the SOC(State of Charge,SOC)change and is related to the impedance value of second-order RC model.By adjusting the adjustment factor K,the compensation function which characterizes the relationship between AC internal resistance and model impedance is obtained and conforms to the law of exponential distribution.The compensation function R-square value by data fitting is higher than 93%.

关 键 词：二阶RC模型 交流内阻 原理分析 

分 类 号：TM912[电气工程—电力电子与电力传动]