Method for accurate battery run time estimation utilizing load-condition voltage
First Claim
1. A method for accurately estimating a run time of a battery utilized by an electronic device, the method comprising:
- determining a starting battery capacity by measuring only an open-circuit voltage of said battery, said open-circuit voltage measured by a voltage-measuring circuit;
determining whether an active operation performed by said electronic device requires estimating said run time of said battery;
determining a battery capacity decline rate utilizing a load-condition voltage of said battery measured by said voltage-measuring circuit;
determining a low-voltage-alarm battery capacity by looking up and retrieving said low-voltage-alarm battery capacity from a plurality of low-voltage alarm battery capacities based on said low-voltage-alarm battery capacity being associated with said active operation, during said active operation of said electronic device;
utilizing said starting battery capacity, said battery capacity decline rate, and said low-voltage-alarm battery capacity to estimate said run time of said battery.
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Accused Products
Abstract
A method for accurately estimating a run time of a battery utilized by an electronic device. The method comprises determining a starting battery capacity utilizing an open-circuit voltage of the battery, determining a battery capacity decline rate utilizing a load-condition voltage of the battery, and determining a low-voltage-alarm battery capacity during an active operation of the electronic device. The method further comprises utilizing the starting battery capacity, the battery capacity decline rate, and the low-voltage-alarm battery capacity to estimate the run time of the battery which may be determined by dividing the difference of the starting battery capacity and the low-voltage-alarm battery capacity by the battery capacity decline rate. One embodiment utilizes an open-circuit voltage lookup table, a load-condition voltage lookup table, and a low-voltage-alarm lookup table that are configured for use with a certain type of battery.
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Citations
19 Claims
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1. A method for accurately estimating a run time of a battery utilized by an electronic device, the method comprising:
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determining a starting battery capacity by measuring only an open-circuit voltage of said battery, said open-circuit voltage measured by a voltage-measuring circuit; determining whether an active operation performed by said electronic device requires estimating said run time of said battery; determining a battery capacity decline rate utilizing a load-condition voltage of said battery measured by said voltage-measuring circuit; determining a low-voltage-alarm battery capacity by looking up and retrieving said low-voltage-alarm battery capacity from a plurality of low-voltage alarm battery capacities based on said low-voltage-alarm battery capacity being associated with said active operation, during said active operation of said electronic device; utilizing said starting battery capacity, said battery capacity decline rate, and said low-voltage-alarm battery capacity to estimate said run time of said battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for accurately estimating a run time of a battery utilized by an electronic device, the method comprising:
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determining a starting battery capacity by measuring only an open-circuit voltage of said battery, said open-circuit voltage measured by a voltage-measuring circuit; determining whether an active operation performed by said electronic device requires estimating said run time of said battery; determining a battery capacity decline rate utilizing a load-condition voltage of said battery measured by said voltage-measuring circuit; determining a low-voltage-alarm battery capacity by looking up and retrieving said low-voltage-alarm battery capacity from a plurality of low-voltage alarm battery capacities based on said low-voltage-alarm battery capacity being associated with said active operation, during said active operation of said electronic device; dividing a difference of said starting battery capacity and said low-voltage-alarm battery capacity by said battery capacity decline rate to estimate said run time of said battery. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification