Battery dropout correction for battery monitoring in mobile unit
First Claim
1. A method for monitoring a voltage of a battery in an electronic device, the device having multiple modes of operation, each mode operating at a respective current load, the method comprising:
- acquiring a sensed battery voltage during a particular mode of operation;
converting the sensed battery voltage to a scaled voltage for a known battery discharge curve having a known current load and a known turn-off voltage; and
comparing the scaled voltage to the known turn-off voltage.
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Abstract
A mobile electronic device can operate in multiple modes, each at a respective current load. Monitoring a battery in such a mobile device includes acquiring a sensed battery voltage during a particular operating mode and converting the sensed battery voltage to a scaled voltage for a known battery discharge curve having a well-defined turn-off voltage. The known battery discharge curve is preferably one for a full current load. The scaled voltage is then compared with the well-defined turn-off voltage to determine the amount of energy remaining in the battery. Operating times for other operating modes can also be calculated and displayed for the user'"'"'s information.
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Citations
21 Claims
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1. A method for monitoring a voltage of a battery in an electronic device, the device having multiple modes of operation, each mode operating at a respective current load, the method comprising:
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acquiring a sensed battery voltage during a particular mode of operation; converting the sensed battery voltage to a scaled voltage for a known battery discharge curve having a known current load and a known turn-off voltage; and comparing the scaled voltage to the known turn-off voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for monitoring a voltage of a battery in an electronic device, the device having multiple modes of operation, each mode operating at a respective current load, the method comprising:
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generating a formula to curve fit a battery discharge curve for the current load of a respective operating mode to a battery discharge curve for a full current load, the full current load battery discharge curve having a known turn-off voltage; acquiring a sensed battery voltage during an operating mode; converting the sensed battery voltage with the formula to a scaled voltage for the full current load battery discharge curve; and comparing the scaled voltage to the known turn-off voltage. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for operating an electronic device having multiple modes of operation, each mode operating at a respective current load, the method comprising:
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acquiring a sensed battery voltage during a particular mode of operation; converting the sensed battery voltage to a scaled voltage for a battery discharge curve having a full current load and a known turn-off voltage; calculating operating times for a plurality of operating modes; and displaying a list of options indicating the plurality of operating modes and their respective operating times. - View Dependent Claims (17)
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18. An electronic device including a plurality of applications, each application operating at a respective current load, the electronic device comprising:
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a battery electrically coupled to the plurality of applications, the battery providing power to the plurality of applications of the electronic device; a voltage monitor coupled to the battery, the voltage monitor providing a sensed voltage of the battery; and a control unit coupled to the plurality of applications, the battery and the voltage monitor, the control unit converting the sensed voltage to a scaled voltage for a known battery discharge curve having a known current load and a known turn-off voltage and comparing the scaled voltage to the known turn-off voltage. - View Dependent Claims (19, 20, 21)
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Specification