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 an equivalent series resistance (ESR) value;
adjusting the ESR value by a correction factor to generate a corrected ESR value;
determining the capacity of the battery based at least in part on the corrected ESR value; and
automatically calibrating the correction factor based at least in part on the measured operating parameter.
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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
8 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 an equivalent series resistance (ESR) value; adjusting the ESR value by a correction factor to generate a corrected ESR value; determining the capacity of the battery based at least in part on the corrected ESR value; and automatically calibrating the correction factor based at least in part on the measured operating parameter. - View Dependent Claims (2, 3, 4)
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5. 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; one or more sensor circuits configured to measure one or more operating conditions of the battery; a battery capacity estimation program configured to access the profile table to translate the measured operating parameter into an equivalent series resistance (ESR) value, adjust the ESR value by a correction factor to generate a corrected ESR value, and determine the capacity of the battery based at least in part on the corrected ESR value; and the battery capacity estimation program being further configured automatically calibrate the correction factor based at least in part on the measured operating parameter. - View Dependent Claims (6, 7, 8)
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Specification