A new characterization measure of the degradation of power battery based on declining point

摘要

Due to the inconvenience of characterization of the degradation of power battery based on capacity fading, this paper proposes a new characterization measure for battery degradation based on declining point. After the declining point is defined and calculated, Olivier-Louis mode is used to fit the discrete discharge experimental data from NASA, the linear correlation between the declining point and capacity is confirmed by correlation analysis and regression analysis, therefore the declining point is verified to be an effective characterization measure of battery degradation.