06892148 is referenced by 78 patents and cites 6 patents.

The remaining run-time (t_rem) of a battery is determined independently of the condition of the battery and the amount of load on the battery by obtaining the value of a present total zero-current capacity (Qmax) of the battery based on relaxed-battery OCV values measured just before and just after a charging or discharging cycle. A current through the battery is integrated to determine a transfer of charge (Q) from the battery, and a value of total run-time (t_total) that would be required to reduce the open circuit voltage of the battery to a predetermined lower limit (Vmin) is determined. The remaining run-time (t_rem) is determined by subtracting the duration of the integrating from the total run-time (t_total).

Title
Circuit and method for measurement of battery capacity fade
Application Number
10/428704
Publication Number
6892148 (B2)
Application Date
May 2, 2003
Publication Date
May 10, 2005
Inventor
David L Freeman
McKinley
TX, US
Dan R Poole
Austin
TX, US
Evgenij Barsoukov
Dallas
TX, US
Agent
Frederick J Telecky Jr
W James Brady
W Daniel Swayze Jr
Assignee
Texas Instruments Incorporated
TX, US
IPC
G01R 031/36
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