四象限探测器
锂电池EIS测试参数拟合中频率范围的影响分析作者:朱亮红 张凯 于湛来源:《科技创新与应用》2019年第29期工业区位论
普朗克常量 摘; 要:锂电池EIS等效电路参数对锂电池的研究有非常重要的价值,为准确拟合出等效电路参数,不同频率下的阻抗可反映不同的电化学过程,因此电路参数准确性也不一样,文章取低频下限值为0.01Hz,对高频部分的选取进行拟合实验对比,通过对22组不同频率上限的数据进行拟合分析,表明在某一的频率范围内进行等效电路参数拟合能获得最佳的拟合效果。聚美优品总裁陈欧
关键词:电化学阻抗谱(EIS);等效电路;频率范围
北美论坛 小说 中图分类号:TM912; ; ; ; 文献标志码:A; ; ; ; ;文章编号:2095-2945(2019)29-0018-02
Abstract: The EIS equivalent circuit parameters of lithium battery are of great value to the research of lithium battery. In order to accurately fit the equivalent circuit parameters, the impedance at different frequencies can reflect different electrochemical processes, so the accuracy of circuit parameters is not the same. In this paper, the lower limit of low frequency is 0.01Hz, the selection of high frequency part is compared by fitting experiment, and the data of 22 groups with different upper limit of frequency ar
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e fitted and analyzed. The results show that the best fitting effect can be obtained by equivalent circuit parameter fitting in a certain frequency range.