05656919 is referenced by 52 patents and cites 24 patents.

The apparatus and method of monitoring and/or indicating an accurate state-of-charge of a battery compensates for varying current loads and changing temperature conditions. The apparatus and method compensate for the Peukert Effect which manifests itself when varying current loads are applied to the battery. Also, the apparatus and method may compensate for temperature changes in the environment of the battery. The extent of the Peukert Effect and temperature variation on the battery is based on intrinsic characteristics of the battery which may be experimentally defined. Specifically, preferred apparatuses include memories for storing various discharging/charging related values and a processor to calculate and determine values related to accurately monitoring the battery's state-of-charge. Also, the apparatus may include a battery state-of-charge indicator including a multi-segmented, multi-color LED display. The apparatuses and methods use a battery having a state-of-charge equal to the battery's charge capacity (CCAP). The battery's state-of-charge is tracked as it discharges/charges. Preferably, if the discharging current (i) is greater than or equal to a predefined discharging current (I), then the Peukert Equation is utilized to determine the actual discharge of the battery. If I<i, then Peukert Equation is not utilized because the Peukert Effect is not exhibited when i is below I.

Title
Accurate battery state-of-charge monitoring and indicating apparatus and method
Application Number
8/557451
Publication Number
5656919
Application Date
November 14, 1995
Publication Date
August 12, 1997
Inventor
Steven H Kahle
Edmonds
WA, US
Richard H Young Jr
Seattle
WA, US
William L Merkes
Seattle
WA, US
George A Ure
Kirkland
WA, US
Richard L Proctor
Seattle
WA, US
Agent
Christenson O Connor Johnson & Kindness PLLC
Assignee
Cruising Equipment
WA, US
IPC
H01M 10/48
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