The Dilemma of C-Rate and Cycle Life for Lithium-Ion Batteries under Low Temperature Fast Charging

Electric vehicles (EVs) in severe cold regions face the real demand for fast charging under low temperatures, but low-temperature environments with high C-rate can lead to lithium plating of anode material, resulting rapid degradation lithium-ion battery (LIB). In this paper, by constructing an electrode–thermal model coupling solid electrolyte interphase (SEI) growth and plating, competition among different factors capacity various ambient temperatures C-rates are systematically analyzed. addition, most important cause LIBs investigated, which reveal change pattern temperature C-rate. The threshold value kinetic law determined, a method lithium-free control is proposed. Finally, studying average aging rate LIBs, reasons abnormal attenuation cycle life at lower ascertained. Through chromaticity diagram expected conditions, optimal strategy explored, its practical application EVs also discussed. This study provide useful reference development high-performance high-safety management systems achieve fine management.