Method and system for tracking battery state-of-health based on charging information
First Claim
1. A method for determining battery state of health, comprising:
- receiving a battery that is substantially uncharged;
charging the battery during a first charge phase during which the battery is charged with a substantially constant charge current and during a second charge phase during which a substantially constant voltage is applied to the battery;
measuring a time duration of the first charge phase only; and
calculating a state of health of the battery based upon the measured time duration and the constant charge current.
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Accused Products
Abstract
Methods, systems, and apparatuses for determining battery state of health are provided. A battery that is substantially uncharged is charged with a substantially constant charge current. A time duration of the charging of the battery with the substantially constant charge current is determined. A state of health of the battery is estimated based upon the determined time duration and the constant charge current. The state of health of the battery may be calculated by multiplying the determined time duration with a value of the constant charge current to determine a total accumulated charge, and applying a predetermined factor to the accumulated charge to determine the state of health. The predetermined factor is a fixed percentage of the total charge capacity of the battery that corresponds to the battery type.
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Citations
20 Claims
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1. A method for determining battery state of health, comprising:
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receiving a battery that is substantially uncharged; charging the battery during a first charge phase during which the battery is charged with a substantially constant charge current and during a second charge phase during which a substantially constant voltage is applied to the battery; measuring a time duration of the first charge phase only; and calculating a state of health of the battery based upon the measured time duration and the constant charge current. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for determining battery health, comprising:
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a battery charger configured to charge a battery from a substantially uncharged state during a first charge phase during which the battery is charged with a substantially constant charge current and during a second charge phase during which a substantially constant voltage is applied to the battery; a charge timer configured to measure a time duration of the first charge phase only; and a battery state of health calculator configured to calculate a state of health of the battery based upon the measured time duration and the constant charge current. - View Dependent Claims (8, 9, 10, 11, 12, 19)
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13. A battery-powered electrical device, comprising:
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a battery monitor that includes a battery charger, a charge timer, and a battery state of health calculator; and a battery port configured to interface the battery with the device; wherein the battery charger is configured to charge the interfaced battery from a substantially uncharged state during a first charge phase during which the battery is charged with a substantially constant charge current and during a second charge phase during which a substantially constant voltage is applied to the battery; wherein the charge timer is configured to measure a time duration of the first charge phase only; and wherein the battery state of health calculator is configured to calculate a state of health of the battery based upon the measured time duration and the constant charge current. - View Dependent Claims (14, 15, 16, 17, 18, 20)
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Specification