Patent ID: 6157169
Filing Date: 2000-12-05
Classification: G01R

Abstract:
An apparatus for measuring a residual capacity of a dumb battery used in a portable electronic device having a display device, comprising:a voltage detector for detecting a terminal voltage of the dumb battery and for producing a terminal voltage signal corresponding to the detected terminal voltage of the dumb battery;a temperature sensor for sensing a battery temperature of the dumb battery and for producing a battery temperature signal corresponding to the sensed battery temperature of the dumb battery;a current sensor for sensing a load current of the dumb battery and for producing a load current signal corresponding to the sensed load current of the dumb battery;a power saving level detector for detecting a power saving level set in the portable electronic device having the display device; anda controller for determining the residual capacity of the dumb battery based on the detected terminal voltage of the dumb battery and for determining a predicted remaining operating time of the portable electronic device based on the sensed load current, and the controller for correcting the determined residual capacity of the dumb battery according to the battery temperature signal and the load current signal, and the controller for correcting the predicted remaining operating time of the portable electronic device according to the power saving level set in the portable electronic device, the resultant residual capacity of the dumb battery and the resultant predicted remaining operating time of the portable electronic device being input to the portable electronic device so as to display on the display device the resultant residual capacity of the dumb battery and the resultant remaining operating time of the portable electronic device.