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.
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