METHODS FOR CHARGING A RECHARGEABLE BATTERY
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United States of America Patent
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Jan 29, 2015
app pub date -
Jul 21, 2014
filing date -
Jul 29, 2013
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Abstract
Disclosure has a method for charging a rechargeable battery. The rechargeable battery is charged by a charger in a first constant current mode for a main charge time period. After the main charge time period, the charger stops charging the rechargeable battery for a relaxation time period. During a sample time period that starts after a predetermined settle time period following the beginning of the relaxation time period, the charger detects an open-circuit voltage of the rechargeable battery to compare with a target voltage. If the open-circuit voltage is less than the target voltage, the charger charges the rechargeable battery in a second constant current mode for a coercive charge time period.
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