LiFePO_4电极放电曲线的阻抗模拟  

Discharge Curve Fitting of LiFePO_4 Based on Impedance Model

作　　者：王铭[1] 李建军[1] 何向明[1] 白鹏[2] 吴扞 万春荣[1] 田光宇[2] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]清华大学汽车工程系,北京100084 [3]台湾立凯电能科技股份有限公司,台湾33068

出　　处：《电化学》2012年第4期306-309,共4页Journal of Electrochemistry

基　　金：国家973计划项目(No.2011CB935902;No.2011CB711202);科技部国际合作(No.2010DFA72760);清华大学自主科研计划(No.2010THZ08116;No.2011THZ08139;No.2011THZ01004)资助

摘　　要：建立了磷酸铁锂(LiFePO4)电极材料放电曲线的阻抗模型.将不同倍率放电的电位分为欧姆电位降、电荷转移电位降与扩散阻抗电位降三部分,以电极交流阻抗谱图结合理论分析,推导出不同倍率电极电位的表达式.模拟结果显示,拟合值与实验值吻合较好.In this paper, an impedance model is developed for simulating the discharge curve of LiFePO4 cathode material. The voltage drop is divided into three parts： the Ohm voltage drop, the charge transfer volt-age drop and the diffusion voltage drop. A theoretical expression has been derived to predict the discharge curves at various discharge rates. The parameters of the equation have been obtained by fitting the results of EIS measurement, and a good agreement between the fitting and the experimental data has been found at all discharge rates.

关 键 词：LIFEPO4 阻抗模型 模拟 

分 类 号：TM912[电气工程—电力电子与电力传动]