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本文研究了不同倍率过充对三电极锂离子电池阻抗的影响。通过02 C电流进行过充实验，使用弛豫时间分布(DRT)方法分析了电池过充前后在不同荷电状态(SOC)下的阻抗变化。结果表明，过充会导致电池的电荷转移阻抗(Rct)和固态电解质界面(SEI)膜的阻抗(Rf)增加；且过充会使得DRT曲线中对应的SEI膜阻抗的峰增加，对应SEI膜的成分发生变化。
Abstract：In this paper,the influence of overcharge at different rates on the impedance of three-electrode Liion battery was studied.The impedance changes of the battery at different SOCs before and after overcharge were analyzed through the experiments of 0.2 C overcharge.The results show that the total impedance of the overcharged battery increases significantly,especially the charge transfer impedance(Rct) and the membrane impedance(Rf).Additionally overcharge can increase the peak corresponding to the membrane impedance in the DRT curve,along with changes in the composition of the membrane impedance.
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基本信息:
DOI：10.19996/j.cnki.ChinBatlnd.2025.06.006
中图分类号:TM912
引用信息:
[1]崔莞琪,李丽娟,宋林霏,等.弛豫时间分布方法分析过充对阻抗的影响[J].电池工业,2025,29(06):477-480.DOI:10.19996/j.cnki.ChinBatlnd.2025.06.006.
基金信息: