Patent ID: 6091246
Filing Date: 2000-07-18
Classification: G01R

Abstract:
A battery remaining capacity measuring apparatus, comprising:a plurality of voltage detectors disposed corresponding to a plurality of batteries connected in series, for detecting terminal voltages of the plurality of batteries respectively;a current detector for detecting a current flowing from the plurality of batteries to a load;a voltage and current collector for reading, for each battery, both a voltage value detected by the corresponding voltage detector and a current value detected by the current detector at every predetermined period of time, and collecting a predetermined number of detected voltage values and corresponding detected current values; anda remaining capacity calculator for calculating a battery remaining capacity for each battery based on the predetermined number of detected voltage values and the corresponding detected current values collected by the voltage and current collector, selecting a battery remaining capacity having a minimum value from out of a plurality of calculated battery remaining capacities, and calculating a battery remaining capacity of the whole of the plurality of batteries based on the selected battery remaining capacity.