锂离子电池开路电压温度系数的测试与分析

Test and analysis of OCV temperature coefficient of lithium-ion batteries

锂离子电池在放电过程中的可逆反应热对电池的发热量具有重要的贡献。开路电压温度系数是决定可逆反应热多少的重要参数,通过对锂离子电池进行开路电压与温度变化实验和统计学计算,得到开路电压温度系数的大小,以及其与SOC之间的关系。经过对该系数的分析可以得出电池内部化学反应的热量变化。

Open circuit voltage （OCV） temperature coefficient of lithium-ion batteries is an important factor for reversible entropic heat, which has effect on heat generation when battery charging. OCV temperature coefficient of lithium-ion battery was obtained by OCV-temperature test and statistics, also the relationship between OCV temperature coefficient and SOC. Cell reaction heat variation can be known through analysis of the OCV temperature coefficient.