锂离子电池内阻测试方法研究  

Study on impedance measurement about lithium ion batteries

作　　者：徐晓东[1] 刘洪文[1] 杨权[2] 

机构地区：[1]军械工程学院电力工程教研室,河北石家庄050003 [2]武汉军械士官学校特种车辆教研室,湖北武汉430075

出　　处：《中国测试》2010年第6期24-26,共3页China Measurement & Test

摘　　要：在深入研究锂离子电池内阻形成原理的基础上,通过对现有锂离子电池内阻测试方法的分析研究,证明了利用锁相放大器提高交流内阻测量精度的原理方法,并提出了基于不同荷电状态下的直流内阻谱概念和不同频率下的交流内阻谱概念。由于内阻谱包含了更多电池性能方面的信息,在实际测量中与传统测量方法相比有一定的优越性。Based on the study of the principle of battery impedance formation and traditional techniques for measuring the impedance of lithium ion battery,improving of measurement precision for battery impedance with lock-in amplifier was proven.Meanwhile,the concepts of DC impedance spectrum based on different SOC and AC impedance spectrum based on different frequency were presented.Impedance spectrum contains more information about battery characteristics,so it is superior to traditional method in practical measurements.

关 键 词：锂离子电池 内阻谱 锁相放大器 电池内阻 

分 类 号：TM911.48[电气工程—电力电子与电力传动] TM930.12