低温环境下相变储能材料在蓄电池中的应用

The Application of Phase-Change Energy Storage Materials in Battery under Low Temperature Environment

目的,研究相变储能材料(PCESMs)在蓄电池中的应用方法和对蓄电池低温性能的影响;方法,对使用了三种不同相变储能材料的电池和普通电池进行低温容量测试、低温循环测试和局部温度对比。分析了低温欠充条件下蓄电池容量和局部温度变化,并研究了相变储能材料对蓄电池低温性能产生影响的原因;结果,使用相变储能材料后,蓄电池在-20℃的容量比普通电池高20%,-28℃低温欠充循环110次后的容量比普通电池高8%,循环过程中的局部平均温度比普通电池高5.4℃;结论:相变储能材料无需额外耗能,可有效提升蓄电池的低温容量和低温欠充循环性能。

Aim,the application and the influence on battery's low temperature performance of phase-change energy storage materials(PCESMs)were studied;Method,low temperature capacity tests,cycle tests and local temperature contrast were carried on the batteries with three different PCESMs and the common batteries.The changes of capacity and local temperature were analyzed on low temperature-under charge condition,and the reason of PCESM's influence on the battery's low temperature performance was studied;Result,with the application of PCESMs,the capacity at-20℃ was 20% higher than that of the common battery,the capacity of the -28℃low temperature-under charge after 110 cycles was 8% higher than that of the common battery,and the average local temperature in the cycle process was 5.4℃ higher than that of the common battery;Conclusion,battery's low temperature capacity and low temperature-under charge cycle performance could be improved effectively by PCESMs,without extra energy.