Device and method for battery state determination
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United States of America Patent
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Jul 14, 2009
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app pub date -
Sep 17, 2007
filing date -
Sep 18, 2006
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Abstract
A method for determining the state of a battery includes receiving measurements representative of at least one of a battery terminal voltage and a battery terminal current from a first unit and using a second unit to determine at least one characteristic variable for a battery state from at least one of the measured battery terminal voltage and the measured battery current. The method also includes using a microprocessor to statistically assess the at least one characteristic variable for the battery state by performing a statistical process check. The method further includes defining an observation window for the at least one characteristic variable within which the at least one characteristic variable is assumed to be steady-state and identifying an implausible value, which is not caused by the battery, for the at least one characteristic variable if the scatter of the at least one characteristic variable exceeds a defined scatter limit.
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