摘要
针对现有磷酸铁锂电池模型在模拟电池大倍率充放电特性时精度较低的问题,基于一种简化电化学模型,对其关键的电化学反应系数进行了关于电流倍率的修正。修正后的模型校正了由于内部反应加剧导致的端电压平台位置的偏移,实现了大倍率充放电时端电压的准确仿真,并在45 Ah圆柱型磷酸铁锂电池上进行了实验验证。
To solve the problem that the existing models of LiFePO 4 lithium-ion batteries have low accuracy when simulating the high current rate charge/discharge properties,this paper revised the key electrochemical reaction coefficient of a simplified electrochemical model according to the current rate.The revised model corrects the terminal voltage platform deviations caused by the intensified internal electrochemical reaction,and realized accurate simulation of the terminal voltage during high current rate charge/discharge.Moreover,the revised model is experimentally verified on a 45 Ah cylindrical LiFePO 4 lithium-ion battery.
作者
刘倩倩
赵言本
吕超
LIU Qianqian;ZHAO Yanben;LV Chao(School of Electronic Engineering,Naval University of Engineering,Wuhan 430033,China;School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China)
出处
《电器与能效管理技术》
2020年第5期57-61,共5页
Electrical & Energy Management Technology
关键词
锂离子电池
大倍率
参数修正
电化学模型
lithium-ion battery
high current-rate
parameter modification
electrochemical model
