Battery charging efficiency computing method for electric cars, involves obtaining ratio between initial and inner resistance at one point of battery, and calculating charging efficiency based on obtained ratio

摘要

The method involves measuring initial resistance of a battery at the start of charging and inner resistance of the battery from a voltage and a current between pair of its terminals. The charging efficiency of the battery is computed based on the ratio between the inner surface resistance and the initial resistance of the battery. An Independent claim is also included for an unit for computing charging efficiency.