Battery state-of-charge estimation
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United States of America Patent
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Jun 23, 2020
Grant Date -
Oct 3, 2013
app pub date -
Mar 29, 2012
filing date -
Mar 29, 2012
priority date (Note) -
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Abstract
A battery pack management system adjusts the relative state-of-charge of respective battery blocks in a battery pack to equalize (i.e., align, balance or otherwise make similar) the peak battery block voltages (i.e., maximum or “upper peak” battery block voltages when the battery pack is being charged and/or minimum or “lower peak” battery block voltages when the battery is being discharged). Upon detecting an anomalous battery block that exhibits outlier upper and lower peak voltages, the battery pack management system adjusts the relative state of charge of respective battery blocks to center their respective upper and lower peak voltages between operating limits, thus maximizing the operating margin of the battery pack as a whole.
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