考虑弛豫过程的锂离子电池电-热-老化耦合建模  

Coupled electro-thermal-aging modeling for lithium-ion battery considering relaxation process

作　　者：耿陈 彭乔[1] 孟锦豪 刘天琪[1] 曾雪洋 陈刚 李燕 GENG Chen;PENG Qiao;MENG Jinhao;LIU Tianqi;ZENG Xueyang;CHEN Gang;LI Yan(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;State Grid Sichuan Electric Power Company Electric Power Research Institute,Chengdu 610072,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]国网四川省电力公司电力科学研究院,四川成都610072

出　　处：《电力自动化设备》2025年第3期33-39,共7页Electric Power Automation Equipment

基　　金：国家电网有限公司科技项目(5108-202299262A-1-0-ZB)。

摘　　要：为提高锂离子电池建模精度,提出了一种考虑弛豫过程的锂电池电-热-老化耦合建模方法。基于电池测试数据,辨识Thevenin等效电路模型参数,建立不同荷电状态与健康状态下的锂电池模型多维参数库。考虑传统Thevenin模型采用固定时间常数,导致电池模型在弛豫时间段端电压的拟合效果较差,采用变时间常数方法优化电池弛豫期间的端电压响应。在热表征方面,在不同电流倍率下均辨识了电池的热模型参数。实验结果表明,所提出的模型能够精确反映锂电池在多种运行条件下的端电压、温度和健康状态。In order to improve the modeling accuracy of lithium-ion batteries,a coupled electro-thermalaging modeling method for lithium-ion batteries considering the relaxation process is proposed.Based on the battery test data,the parameters of Thevenin equivalent circuit model are identified,and the multidimen-sional parameter table of lithium-ion battery model in different state of charge and state of health(SOH)is established.Considering that the traditional Thevenin model uses a fixed time constant,which leads to a poor fitting of the battery model for the terminal voltage during the relaxation period,a variable time con-stant method is used to optimize the terminal voltage response of the battery during the relaxation period.In terms of thermal characterization,the thermal model parameters of the battery are identified at different current multiplicities.The experimental results indicate that the proposed model can accurately reflect the terminal voltage,temperature,and SOH of lithium-ion battery under various operating conditions.

关 键 词：锂离子电池 电池建模 Thevenin模型 电-热-老化耦合模型 弛豫模型 

分 类 号：TM911[电气工程—电力电子与电力传动]