锂动力电池内阻影响因素的实验研究
发布时间：2018-10-18 15:49
【摘要】：锂动力电池内阻是衡量电动汽车用电池性能的一个重要参数。本文中研究了不同环境温度、放电倍率和放电深度下的电池内阻随循环次数而变化的规律。结果表明,电池内阻与循环次数之间呈幂指数关系。电池内阻变化率与环境温度之间近似于二次函数关系,当环境温度为20℃时,电池内阻及其随循环次数的变化率均最小;电池内阻变化率随放电倍率的增大而增大,当放电倍率为1C时,电池内阻变化率基本上不随循环次数而变化,而当放电倍率为1.5C和2C时,电池内阻变化率随循环次数增加而明显增大;放电深度为25%和50%时,电池内阻变化率随循环次数的变化曲线相近,当放电深度达到100%时,电池内阻变化率显著增大。单次循环放电中,放电深度为0~80%时,电池内阻随放电深度的变化较小,当放电深度为80%~100%时,电池内阻随放电深度的增加而急剧增加。
[Abstract]:The internal resistance of lithium power battery is an important parameter to measure the battery performance of electric vehicle. In this paper, the internal resistance of the battery varies with the number of cycles at different ambient temperature, discharge rate and discharge depth. The results show that there is a power exponential relationship between the internal resistance of the battery and the number of cycles. The change rate of battery internal resistance and environmental temperature is approximately the quadratic function. When the ambient temperature is 20 鈩，
本文编号：2279604
[Abstract]:The internal resistance of lithium power battery is an important parameter to measure the battery performance of electric vehicle. In this paper, the internal resistance of the battery varies with the number of cycles at different ambient temperature, discharge rate and discharge depth. The results show that there is a power exponential relationship between the internal resistance of the battery and the number of cycles. The change rate of battery internal resistance and environmental temperature is approximately the quadratic function. When the ambient temperature is 20 鈩，
本文编号：2279604
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