Comparative Study on Traction Battery Charging Strategies from the Perspective of Material Structure
作者机构：China Automotive Technology and Research Center Co.LtdTianjin 300300China CAT ARC NEV Test Center(Tianjin)Co.LtdTianjin 300300China
出 版 物：《Automotive Innovation》 (汽车创新工程（英文）)
年 卷 期：2022年第5卷第4期
页 面：427-437页
核心收录：
基 金：supported by National Key R&D Program of China(2021YFB2501500) Young Elite Scientists Sponsorship Program by CAST(2021QNRC001) Key R&D Program of Tianjin(20JCZDJC00520)
主 题：Traction battery Charging strategy Cycle life Material evolution
摘 要：The service life of an electric vehicle is,to some extent,determined by the life of the traction battery.A good charging strat-egy has an important impact on improving the cycle life of the lithium-ion ***,this paper presents a comparative study on the cycle life and material structure stability of lithium-ion batteries,based on typical charging strategies currently applied in the market,such as constant current charging,constant current and constant voltage charging,multi-stage constant current charging,variable current intermittent charging,and pulse *** with the reference charging strategy,the charging capacity of multi-stage constant current charging reaches 88%.Moreover,the charging time is reduced by 69%,and the capacity retention rate after 500 cycles is 93.3%.Through CT,XRD,SEM,and Raman spectroscopy analysis,it is confirmed that the smaller the damage caused by this charging strategy to the overall structure of the battery and the layered structure and particle size of the positive electrode material,the higher the capacity retention rate *** work facilitates the development of a better charging strategy for a lithium-ion battery from the perspective of material structure.
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