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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Accused Products
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.
31 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