METHODS FOR CHARGING A RECHARGEABLE BATTERY
First Claim
1. A method for charging a rechargeable battery, comprising:
- charging the rechargeable battery in a first constant current mode for a main charge time period;
after the main charge time period, stopping 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, detecting an open-circuit voltage of the rechargeable battery and comparing the open-circuit voltage with a target voltage; and
if the open-circuit voltage is less than the target voltage, charging the rechargeable battery in a second constant current mode for a coercive charge time period.
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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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Citations
20 Claims
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1. A method for charging a rechargeable battery, comprising:
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charging the rechargeable battery in a first constant current mode for a main charge time period; after the main charge time period, stopping 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, detecting an open-circuit voltage of the rechargeable battery and comparing the open-circuit voltage with a target voltage; and if the open-circuit voltage is less than the target voltage, charging the rechargeable battery in a second constant current mode for a coercive charge time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method capable for recharging a rechargeable battery, comprising:
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charging the rechargeable battery in a pre-charge constant current mode, until a battery voltage of the rechargeable battery exceeds an under voltage; after charging the rechargeable battery in the pre-charge constant current mode, charging the rechargeable battery in a first constant current mode until the rechargeable battery exceeds a target voltage, wherein the target voltage is higher than the under voltage; after charging the rechargeable battery in the first constant current mode, stopping charging the rechargeable battery for a predetermined settle time period; after the predetermined settle time period, detecting an open-circuit voltage of the rechargeable battery and comparing the open-circuit voltage with the target voltage; and charging the rechargeable battery in a second constant current mode for a coercive charge time period, if the open-circuit voltage is less than the target voltage. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification