电力系统自动化2013，Vol.37Issue(1)：54-58,5.DOI:10.7500/AEPS201210170
梯次利用锂离子电池电化学阻抗模型及特性参数分析
Characterization of Electrochemical Impedance Equivalent Model and Parameters for Li-ion Batteries Echelon Use
摘要
Abstract
An electrochemical impedance model for Li-ion batteries echelon use is developed based on the electrochemical impedance spectroscopy (EIS) test results. It is shown that the model fitting results agree with the experimental results, and the simulation error can be controlled within 2% with the proposed battery model. The effects of the battery state of charge (SOC) and degradation on model parameters are discussed in detail. It is suggested that the DC resistance of the battery is essentially constant as SOC varies, while both activation polarization impedance and concentration polarization impedance increase significantly at both ends of SOC. The polarization impedance is similarly going up with the battery aging while the ohmic resistance is hardly influenced by battery degradation. It is concluded that the battery performance degradation is primarily a result of polarization impedance increase, which provides the theoretical foundation for Li-ion batteries echelon use applied in the energy storage system.关键词
锂离子电池/梯次利用/阻抗模型/荷电状态Key words
Li-ion battery/ echelon use/ impedance model/ state of charge (SOC)引用本文复制引用
张彩萍,姜久春,张维戈,刘秋降,鲁妍..梯次利用锂离子电池电化学阻抗模型及特性参数分析[J].电力系统自动化,2013,37(1):54-58,5.基金项目
国家高技术研究发展计划(863计划)资助项目(2011AA05A108). （863计划）
