Method for detecting cell state-of-charge and state-of-discharge divergence of a series string of batteries or capacitors
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United States of America Patent
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Nov 12, 2013
Grant Date -
Oct 1, 2009
app pub date -
Mar 31, 2009
filing date -
Mar 31, 2008
priority date (Note) -
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Abstract
A system for charging a battery includes a battery pack having at least two lithium ion cells. A controller detects a rate of change of voltage with respect to a state of charge (dV/dSOC) of the battery pack based on a calculated dV/dSOC that represents the battery pack as a whole, without calculating dV/dSOC individually on a cell-by-cell basis. Charging is terminated when dV/dSOC reaches a predetermined value.
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