锂离子电池交流阻抗谱应用  

Application of Impedance Spectroscopy for Lithium Battery

作　　者：陈金荣 

机构地区：[1]上海理工大学机械工程学院,上海

出　　处：《物理化学进展》2024年第2期273-283,共11页Journal of Advances in Physical Chemistry

摘　　要：随着环境保护意识的增强,锂离子电池作为一种车用动力电池得到了广泛应用。然而,如何准确测试电池的荷电状态、识别过充、过放和内部短路等问题仍然是一个挑战。本研究采用电化学阻抗谱(Electrochemical Impedance Spectroscopy, EIS)技术探究了有效评估三元锂电池状态的方法。本研究在不同荷电状态(State of Charge, SOC)条件下对电池进行了EIS测试,并在过充、过放以及内部短路情况下进行了相应的电化学阻抗实验,从而得出结论,验证了EIS用于估计各种电池状态以及诊断电池故障的适用性。此外,作为EIS的补充手段,本研究还采用了弛豫时间分布法对不同状态下的电池进行了测试,并将结果与EIS测试进行了对比,以得出最终的结论。With the increasing awareness of environmental protection, lithium-ion batteries have been widely used as an automotive power battery. However, it is still a challenge to accurately test the charge state, health state, and identify overcharge, overdischarge, and internal short circuit of the battery. In this study, the Electrochemical Impedance Spectroscopy (EIS) technique was used to explore the methods to effectively assess the state of Li-ion ternary batteries. In this study, EIS tests were conducted on the battery under different SOC conditions, and the corresponding electrochemical impedance experiments were performed under overcharging, overdischarging, and internal short-circuit conditions, which led to the conclusion that the applicability of EIS for estimating various battery states and diagnosing battery faults was verified. In addition, as a complementary means to EIS, the relaxation time distribution method was used in this study to test batteries in different states, and the results were compared with the EIS tests to draw final conclusions.

关 键 词：三元锂离子电池 电化学阻抗谱 弛豫时间分布 

分 类 号：TM9[电气工程—电力电子与电力传动]