循环使用与储存条件对石墨/LiCoO_(2)电池寿命的影响分析

Effect Analysis of Recycling and Storage Conditions on Graphite/LiCoO_(2) Battery Life

锂离子电池被广泛应用于能量储存,电池老化的影响在整个使用寿命中限制了其性能。一方面通过分析石墨/LiCoO_(2)电池在不同荷电状态(State of charge,SOC)范围采取循环试验的数据,量化了平均SOC和SOC的变化(ΔSOC)对锂离子电池可用容量衰减的影响,并建立循环老化模型;另一方面,通过分析石墨/LiCoO_(2)电池不同SOC储存状态和不同储存温度寿命试验数据,揭示了储存条件变化对锂电池健康状态衰退过程的影响规律,并建立日历老化模型。分析结果可以应用于电池实际循环使用和静置储存优化设置。

Lithium-ion batteries are used for energy storage in a wide array of applications,and the effects of battery ageing limit their performance and occur throughout their whole life.On the one hand,the influence of the average SOC and SOC changes(ΔSOC)on the available capacity decay of lithium-ion batteries is quantified by analyzing the data of the graphite/LiCoO_(2)batteries in different state of charge(SOC)ranges,and a cycle aging model is established.On the other hand,by analyzing the test data of different SOC storage states and different storage temperature life of graphite/LiCoO_(2)batteries,the influence of storage condition changes on the decay process of lithium battery state of health is revealed,and a calendar aging model is established.The analysis results can be applied to the actual battery cycle use and static storage optimization settings.