磷酸铁锂电池老化研究探讨

Research on Aging of Lithium Iron Phosphate Batteries

磷酸铁锂电池的老化主要包括日历老化和循环老化。总结了近些年磷酸铁锂电池老化重要研究进展,梳理了磷酸铁锂电池循环老化机理和影响因素、日历老化机理和影响因素,探讨了磷酸铁锂电池老化的主要影响因素。日历老化主要受运行或存储时间、温度和荷电状态(SOC)的影响。循环老化主要受运行温度、充放电倍率和放电深度影响。磷酸铁锂电池可以基于经典Arrhenius模型开展温度加速老化试验,但加速老化温度不宜超过60℃,加速循环倍率不宜超过3 C。为长寿命、高安全的磷酸铁锂电池储能系统设计提供了理论依据和设计参考。

The aging of lithium iron phosphate battery mainly includes calendar aging and cycle aging.The important research progress of aging of lithium iron phosphate batteries is summarized in recent years.The cycle aging mechanism and influencing factors and calendar aging mechanism and influencing factors of lithium iron phosphate batteries are sorted out.The main influencing factors of lithium iron phosphate battery aging is discussed.Calendar aging is mainly affected by operating or storage time,temperature and state of charge(SOC).Cycle aging is mainly affected by operating temperature,charge/discharge rate and depth of discharge.The temperature accelerated aging test can be carried out for LiFePO 4 based on the classical Arrhenius model,but the accelerated aging temperature should not exceed 60℃and the accelerated cycle multiplier should not exceed 3 C.It provides a theoretical basis and design reference for the design of long-life and high-safety LiFePO 4 energy storage system.