Abstract:  A calibration method of fast charging map without lithium plating for power lithium-ion battery was proposed to solve the safety problem of lithium-ion battery fast charging. Based on the potential criterion, the threshold value of negative electrode potential without lithium plating was set up by using the reference electrode to monitor the negative potential. Five fast charging strategy curves were obtained by adjusting different charging initial temperature points. State of change-temperature-current contour map (SOC-T-I Map) is obtained with piecewise linear interpolation method. The contrast experiment of rapidity and the cycle experiment of 25 ° C fast charging strategy were designed to verify the map's rapidity and no lithium plating. The results show that the fast charging strategy is 45.3% and 18.0% shorter than that of constant current 1 C and 1.5 C at 25 ° C. After 200 fast charging cycles, the differential curve of relaxation voltage has no minimum value, and the battery maintains a capacity retention rate of 99.7%, indicating that there is no metal lithium plating. The method of calibrating the current map provides the idea of mining the fast charging ability of the battery, and the calibrated map is suitable for fast charging of electric vehicles under diffident working conditions. 

Key words: electric vehicles, lithium-ion battery, fast charging without lithium plating, reference electrode, state of change-temperature-current contour map (SOC-T-I Map)