Enhanced-accuracy battery capacity prediction using multiple discharge curves
First Claim
1. A method comprising:
- detecting a voltage across a battery, an electrical current supplied by the battery, and a number of charge/discharge cycles of the battery;
selecting a first curve from a plurality of battery discharge curves based at least in part on the electrical current supplied by the battery;
selecting a second curve from the plurality of battery discharge curves based at least in part on the number of charge/discharge cycles;
generating a combined curve based at least in part on the first and second curves;
determining a residual battery capacity based at least in part on the measured voltage and the combined curve; and
displaying the residual battery capacity.
1 Assignment
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Accused Products
Abstract
Enhanced-accuracy battery capacity prediction in which a residual capacity of a battery associated with a mobile electronic device are determined and displayed. One or more characteristic values of the battery are detected and an appropriate battery discharge curve is selected from multiple stored battery discharge curves based on the electrical current supply rate or a number of historical charge/discharge cycles of the battery, or both. A detected battery voltage is compared to the selected curve, and the residual capacity of the battery is calculated based on the present discharge capacity and the useful discharge capacity of the battery based on the selected curve. The residual capacity accurately reflects the present operational state of the device and the present state of the battery. The accurate residual capacity of the battery is displayed on a display device for user viewing.
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Citations
21 Claims
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1. A method comprising:
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detecting a voltage across a battery, an electrical current supplied by the battery, and a number of charge/discharge cycles of the battery; selecting a first curve from a plurality of battery discharge curves based at least in part on the electrical current supplied by the battery; selecting a second curve from the plurality of battery discharge curves based at least in part on the number of charge/discharge cycles; generating a combined curve based at least in part on the first and second curves; determining a residual battery capacity based at least in part on the measured voltage and the combined curve; and displaying the residual battery capacity. - View Dependent Claims (2)
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3. A method comprising:
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measuring a voltage across a battery; detecting a first characteristic value of the battery, wherein the first characteristic value comprises a number of charge/discharge cycles; selecting a curve from a plurality of battery discharge curves based at least in part on the first characteristic value; and determining a residual battery capacity based at least in part on the measured voltage and the selected curve. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A device comprising:
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a battery; a memory configured to store a plurality of battery discharge curves based at least in part on a discharge characteristic of the battery; a battery characteristic value detector configured to measure a voltage across the battery and a characteristic value of the battery, wherein the characteristic value comprises a number of charge/discharge cycles of the battery; a battery discharge curve selector configured to select a curve from the plurality of battery discharge curves based at least in part on the measured characteristic value; a controller configured to determine a residual battery capacity based at least in part on the measured voltage and the selected curve; and a display configured to display the residual battery capacity.
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18. A device comprising:
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a battery; a memory configured to store a plurality of battery discharge curves based at least in part on a discharge characteristic of the battery; a battery characteristic value detector configured to measure a voltage across the battery, an electrical current supplied by the battery, and a number of charge/discharge cycles; a battery discharge curve selector configured to select a first curve from the plurality of battery discharge curves based at least in part on the electrical current supplied by the battery, and a second curve from the plurality of battery discharge curves based at least in part on the number of charge/discharge cycles; a controller configured to generate a combined curve based at least in part on the first and second curves, and to determine a residual battery capacity based at least in part on the measured voltage and the combined curve; and a display configured to display the residual battery capacity.
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19. A device comprising:
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a battery; a battery characteristic value detector configured to measure a voltage across the battery; a battery discharge curve selector configured to select a curve from a plurality of battery discharge curves; and a controller configured to determine a residual battery capacity based at least in part on the measured voltage and the selected curve, wherein the battery discharge curve selector further comprises a reader configured to receive a number of charge/discharge cycles of the battery and is further configured to select the curve based at least in part on the number of charge/discharge cycles. - View Dependent Claims (20)
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21. A device comprising:
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a battery, a battery characteristic value detector configured to measure a voltage across the battery; an estimator configured to estimate a number of charge/discharge cycles of the battery; a battery discharge curve selector configured to select a curve from a plurality of battery discharge curves based at least in part on the number of charge/discharge cycles; and a controller configured to determine a residual battery capacity based at least in part on the measured voltage and the selected curve.
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Specification