摘要
以淘汰磷酸铁锂动力电池为研究对象,采用内阻测试仪测试法、直流阻抗法、短路电流与内阻水平法、交流阻抗法分别进行内阻测试,结果表明:内阻测试仪测试法最简单,可以在线测量,但是系统误差最大;直流阻抗法和短路电流与内阻水平法可避免较大的人为误差,并且能够清楚地显示电池内阻在不同SOC下的变化情况,但是只能在离线状态下测量,其中,短路电流与内阻水平法测试是在大电流放电下进行的,对电池会产生一定的影响;交流阻抗法测试能够比较全面地反映各部分动力学过程产生的阻抗,但是只能测出某一荷电状态下的电池内阻变化,并且测试相对复杂且受环境影响较大。
Resistances of eliminated power Li Fe PO4 batteries were measured respectively by the internal resistance tester method, the DC impedance method, the short circuit current and resistance level method and the AC impedance method. The results show that the internal resistance tester is most simple and can online measure,but the systematic error is too big. Human error could be avoided through using the DC impedance method and the short circuit and resistance level method. Moreover, the change of resistance under different SOC was clearly showed,but batteries must be offline. The short circuit and resistance level method was conducted under large current,which could produce damage to batteries. The Ac impedance method could comprehensively reflect the impedance produced by dynamic process, but this method only detect the change of resistance under one state of Charge. By contrast,this test was relatively complex and greatly influenced by the environment.
出处
《电源技术》
CAS
CSCD
北大核心
2016年第2期274-276,320,共4页
Chinese Journal of Power Sources
基金
国家自然科学基金资助(21376035)
