Method and apparatus for calibrating a rechargeable battery
First Claim
1. A method for calibrating a rechargeable battery for an electronic device comprising:
- charging the battery by a charging process;
determining a total amount of charge accepted by the battery during the charging process; and
providing a value of total battery capacity of the battery based, at least in part, on the total amount of charge accepted by the battery.
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Accused Products
Abstract
Method and apparatus for calibrating a rechargeable battery for mobile telephones and other electronic devices. Calibration is accomplished during a process of completely charging the battery by determining the total amount of charge accepted by the battery during the charging process, and providing a value of total charge capacity of the battery based, at least in part, on the total amount of charge accepted by the battery. The total charge capacity of the battery is used to calculate remaining battery capacity and to predict the remaining operational time of the device. Alternative calibration procedures are provided if the battery is not completely discharged before charging or if the battery is not fully charged by the charging process. The calibration procedures of the invention require no interaction from a user (other than his initiating the normal charging process), and typically permits a calibration to be carried out notwithstanding varying usage habits of different users.
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Citations
46 Claims
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1. A method for calibrating a rechargeable battery for an electronic device comprising:
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charging the battery by a charging process;
determining a total amount of charge accepted by the battery during the charging process; and
providing a value of total battery capacity of the battery based, at least in part, on the total amount of charge accepted by the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus for calibrating a rechargeable battery for an electronic device comprising:
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a charging circuit for charging said battery, a determiner which determines the total amount of charge accepted by the battery during charging; and
a provider which provides a total battery capacity value for said battery based, at least in part, on the total amount of charge accepted by the battery. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A method for determining remaining battery capacity of a battery for an electronic device, said battery including at least one battery cell, the method comprising:
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determining a voltage across said at least one battery cell; and
determining a remaining battery capacity value as a function of said voltage across said at least one battery cell, wherein said step of determining a voltage across said at least one battery cell comprises measuring battery voltage when said battery current is sufficiently low that said battery voltage is substantially equal to said voltage across said at least one battery cell. - View Dependent Claims (36, 37, 38)
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39. A method for calibrating a battery of an electronic device, comprising:
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monitoring used battery capacity of said battery during use of said device and providing a monitored remaining battery capacity value therefrom;
predicting a remaining battery capacity value of said battery, calculating a difference between said predicted remaining battery capacity value and said monitored remaining battery capacity value; and
updating a total capacity value of said battery as a result of said difference. - View Dependent Claims (40, 41, 42)
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43. A method for calibrating a battery of an electronic device, comprising:
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monitoring said battery during use of said device to determine a difference between a remaining battery capacity value indicated by a fuel gauge of said device and an actual remaining battery capacity value; and
updating a total battery capacity value stored in said device as a result of said difference. - View Dependent Claims (44, 45, 46)
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Specification