US 6,982,544 B2
System and method of battery capacity reporting
Phat H. Tran, Kitchener (Canada)
Assigned to Research In Motion Limited, Waterloo (Canada)
Filed on Sep. 16, 2004, as Appl. No. 10/942,546.
Application 10/942546 is a continuation of application No. 10/189714, filed on Jul. 03, 2002, granted, now 6,794,852.
Claims priority of provisional application 60/303129, filed on Jul. 05, 2001.
Prior Publication US 2005/0029988 A1, Feb. 10, 2005
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/46 (2006.01)
U.S. Cl. 320—132 20 Claims
 
1. A method for reporting an available capacity of a rechargeable battery, comprising:
reporting the available capacity of the rechargeable battery based on a measured battery voltage;
detecting a change in state of the rechargeable battery between a discharge state and a charge state;
if the detected state change is from the charge state to the discharge state, then reporting only decreases in the available capacity until another state change is detected; and
if the detected state change is from the discharge state to the charge state, then reporting only increases in the available capacity until another state change is detected.