초록 ▼

A battery monitoring system determines an accurate residual capacity of a battery in consideration of variation of battery temperature, amount of battery self-discharge, and amount of battery discharge from a host device, such as a portable computer. The monitoring system further determines a predic

A battery monitoring system determines an accurate residual capacity of a battery in consideration of variation of battery temperature, amount of battery self-discharge, and amount of battery discharge from a host device, such as a portable computer. The monitoring system further determines a predicted remaining operating time of the device. The battery capacity measuring apparatus includes a microcontroller, a battery pack, a battery temperature detection circuit, a battery voltage detection circuit, a load current detection circuit, and a power saving level detector. The microcontroller is coupled to a host device such that it indicates the battery residual capacity along with the remaining operating time of the device via a display. The microcontroller calculates the residual capacity of the battery based on the detected battery voltage and a correction is made to the calculated residual capacity according to the battery temperature signal and the load current signal, the corrected resultant residual capacity being fed to the host device so as to display the residual capacity of the battery. Also, the microcontroller calculates the remaining operating time of the device based on the detected load current and a correction is made thereto according to the set power saving level of the device, the resultant remaining operating time being fed to the host device so as to display the corrected remaining operating time of the device.

대표청구항 ▼

[ What is claimed is:] [1.] 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 t

[ What is claimed is:] [1.] 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.