System and method of battery capacity estimation
First Claim
1. In a mobile device having a profile table that relates a plurality of battery profile values with a plurality of operating parameter values, a method of determining a capacity of a battery using the profile table, comprising:
- measuring an operating parameter of the battery;
accessing the profile table to translate the measured operating parameter into a battery profile value;
adjusting the battery profile value by a correction factor to generate a corrected battery profile value;
calculating the capacity of the battery using the corrected battery profile value;
using the measured operating parameter to estimate an actual battery profile value; and
automatically calibrating the correction factor using the estimated actual battery profile value.
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Accused Products
Abstract
In accordance with the teachings described herein, systems and methods are provided for battery capacity estimation. A profile table may be used that relates a plurality of battery profile values with a plurality of operating parameter values. The profile table may be accessed to translate one or more measured operating parameters into one or more corresponding battery profile values. One or more of the battery profile values may be adjusted by a correction factor to generate a corrected battery profile value. The available capacity of the battery may be calculated using the corrected battery profile value. The correction factor may then be automatically calibrated by using an estimated battery profile value calculated from the one or more measured operating parameter.
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Citations
22 Claims
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1. In a mobile device having a profile table that relates a plurality of battery profile values with a plurality of operating parameter values, a method of determining a capacity of a battery using the profile table, comprising:
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measuring an operating parameter of the battery;
accessing the profile table to translate the measured operating parameter into a battery profile value;
adjusting the battery profile value by a correction factor to generate a corrected battery profile value;
calculating the capacity of the battery using the corrected battery profile value;
using the measured operating parameter to estimate an actual battery profile value; and
automatically calibrating the correction factor using the estimated actual battery profile value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of estimating an operating time for a predetermined function of a device having a battery, the predetermined function relying on the battery to operate for the duration of the operating time, comprising:
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determining an accessible capacity value for the battery;
determining a load value for the predetermined function; and
determining the operating time value as a function of the load value and the accessible capacity value. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A mobile device, comprising:
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a memory device;
a battery;
a profile table stored in the memory device that relates a plurality of battery profile values with a plurality of operating parameter values;
means for measuring an operating parameter of the battery;
means for accessing the profile table to translate the measured operating parameter into a battery profile value;
means for adjusting the battery profile value by a correction factor to generate a corrected battery profile value;
means for calculating the capacity of the battery using the corrected battery profile value;
means for using the measured operating parameter to estimate an actual battery profile value; and
means for automatically calibrating the correction factor using the estimated actual battery profile value.
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Specification