It can be deduced by the Mas theory that charging accept rate
is inversely proportional to charging period t, the rapidity of charging can be demonstrated by charging accept rate. However, how to count charging accept rate in different charging mode and charging system is always a problem puzzled engineers and technicians. This thesis probes the computed method of charging accept rate under different DOD and charging system through research about charge current attenuation index under different DOD. It also analyze the two different concepts of charging accept rate and charging acceptance which comes to a conclusion that the variation tendencies of charging accept rate and charging acceptance are the same under particular case, while in some cases, variation tendency is opposite.