Development of a LiFePO4-based high power lithium secondary battery for HEVs applications

来源期刊:Rare Metals2020年第12期

论文作者:Long-Zheng Deng Feng Wu Xu-Guang Gao Wei-ping Wu

摘    要:A LiFeP04-type lithium secondary battery cell of 8 Ah capacity with a high energy density and power density was developed for hybrid electric vehicle(HEV)applications by optimizing the key raw materials and process design.The 8 Ah class LiFePO4 cell with an energy density of 77.2 Wh·kg-1 exhibits a power density of2818 W·kg-1 at 50 % SOC(state of charge).The battery shows good cyclic capability with the capacity retention of81.1 % after 1,870 cycles at 5 C charge and 10 C discharge rates.It is demonstrated that the cells have an excellent balance of high-power,high-energy,low temperature,and long-life performance for meeting the requirements of HEV.

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