摘要
以现有电池阻抗模型为基础,以电工学为理论依据,建立锂电池阻抗模型。通过电化学阻抗谱对锂电池的阻抗特性进行分析,得到锂电池阻抗模型中各参数在充电和放电过程中随电池荷电状态(State of Charge,SOC)的变化规律。为验证得到的锂电池阻抗模型中各等效元件的参数值,采用暂态边界电压测试法对锂电池在充放电过程中的电压瞬态变化关系进行分析,得到模型中欧姆极化和电化学极化中等效元件参数值的误差均在12%以内。
This study was based on existing battery impedance models and the lithium battery impedance model was established. Through electrochemical impedance spectroscopy, the impedance characteristics of lithium batteries were analyzed. The parameters of the lithium battery impedance model were obtained for different state-of-charge levels during charging and discharging processes. In order to verify the parameters of the equivalent circuit elements in the model, by using the transient-boundary voltage method, the transient voltage variation of the lithium battery was analyzed during charging and discharging processes. The errors of these parametersin ohmic polarization and electrochemical polarization are within 12%.
出处
《汽车工程学报》
2014年第6期447-454,共8页
Chinese Journal of Automotive Engineering
基金
国家高技术研究发展计划(863计划)(2012AA111401)
安徽省自然科学基金(1208085ME78)
关键词
电动汽车
锂电池
阻抗特性
阻抗模型
electric vehicle
lithium battery
impedance characteristic
impedance model
