Patent ID: 8660808
Filing Date: 2014-02-25
Classification: G01R

Abstract:
1. A method for accurately estimating a run time of a battery utilized by an electronic device, the method comprising: determining a starting battery capacity by measuring only an open-circuit voltage of said battery, said open-circuit voltage measured by a voltage-measuring circuit; determining whether an active operation performed by said electronic device requires estimating said run time of said battery; determining a battery capacity decline rate utilizing a load-condition voltage of said battery measured by said voltage-measuring circuit; determining a low-voltage-alarm battery capacity by looking up and retrieving said low-voltage-alarm battery capacity from a plurality of low-voltage alarm battery capacities based on said low-voltage-alarm battery capacity being associated with said active operation, during said active operation of said electronic device; utilizing said starting battery capacity, said battery capacity decline rate, and said low-voltage-alarm battery capacity to estimate said run time of said battery.