本文采用锂电池多尺度耦合模型对不同工况下放电的电极颗粒内部Li浓度分布特性进行了研究,并根据放电过程中的Li脱嵌量对放电容量进行了估算.结果表明:在1C放电电流下,当环境温度较低(0～25℃)时,锂电池放电容量随环境温度的升高而迅速增大,当环境温度较高(25～40℃)时,放电容量基本不随温度变化;在25℃的环境温度下,当放电电流较小时(0 C～4 C)时,放电容量随放电倍率的增大而减小,而当放电电流较大(4 C～10 C)时,锂电池放电容量随放电倍率的增大基本不变.
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