Method for accurate battery run time estimation utilizing load-condition voltage

Abstract

One disclosed embodiment is a method for accurately estimating a run time of a battery utilized by an electronic device. The method comprises determining a starting battery capacity utilizing an open-circuit voltage of the battery, determining a battery capacity decline rate utilizing a load-condition voltage of the battery, and determining a low-voltage-alarm battery capacity during an active operation of the electronic device. The method further comprises utilizing the starting battery capacity, the battery capacity decline rate, and the low-voltage-alarm battery capacity to estimate the run time of the battery. The run time estimate is determined, in one embodiment, by dividing the difference of the starting battery capacity and the low-voltage-alarm battery capacity by the battery capacity decline rate. One embodiment utilizes an open-circuit voltage lookup table, a load-condition voltage lookup table, and a low-voltage-alarm lookup table that are configured for use with a certain type of battery.

Dependencies are inferred from the claim text.