Battery state of charge voltage hysteresis estimator
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United States of America Patent
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Aug 4, 2009
Grant Date -
May 4, 2006
app pub date -
Dec 13, 2005
filing date -
Apr 6, 2004
priority date (Note) -
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Abstract
A battery control module is provided for use with a battery and includes a voltage measuring module that measures battery voltage, a current measuring module that measures battery current, and a state of charge (SOC) module that communicates with said current and voltage measuring modules. In some features, the SOC module determines an unfiltered SOC of said battery, a characteristic of said unfiltered SOC, and a modified SOC that is based on said unfiltered SOC and said characteristic. In other features, the SOC module determines first and second reset voltages, compares the battery voltage to the first and second reset voltages, and determines an unfiltered SOC based on said first and second reset voltages and said battery voltage.
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