Use-adaptive fuel gauging for battery powered electronic devices
First Claim
1. A method of fuel gauging in an electronic device having a battery, the method comprising:
- adapting the fuel gauging in the device to a use model, the use model comprising how the device is actually used by a user, wherein adapting the fuel gauging comprises;
checking a charge level of the battery each time the battery is replaced;
monitoring a net energy extracted from the battery as a function of time during use of the device by the user;
updating an estimated total available battery energy, wherein the estimated total available battery energy is derived from the net energy extracted; and
adapting the fuel gauging to the updated estimated total available battery energy,wherein checking the battery charge level comprises;
detecting a battery replacement event;
measuring the charge level of the battery; and
comparing the measured charge level to an expected charge level range.
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Accused Products
Abstract
A method and a battery powered electronic device incorporate use-adaptive fuel gauging. The use-adaptive fuel gauging adapts a fuel gauge algorithm to an average use model for the device. The adaptation accounts for the effects that variations in average use by a user of the device have on a total available energy or charge capacity of a battery. Accordingly, use-adaptivity can improve the fuel gauging accuracy by improving an estimate of the total energy available. The method and device optionally account for different battery chemistries yielding further increases in fuel gauging accuracy compared to conventional fuel gauging approaches.
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Citations
35 Claims
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1. A method of fuel gauging in an electronic device having a battery, the method comprising:
adapting the fuel gauging in the device to a use model, the use model comprising how the device is actually used by a user, wherein adapting the fuel gauging comprises; checking a charge level of the battery each time the battery is replaced; monitoring a net energy extracted from the battery as a function of time during use of the device by the user; updating an estimated total available battery energy, wherein the estimated total available battery energy is derived from the net energy extracted; and adapting the fuel gauging to the updated estimated total available battery energy, wherein checking the battery charge level comprises; detecting a battery replacement event; measuring the charge level of the battery; and comparing the measured charge level to an expected charge level range.
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2. A method of fuel gauging in an electronic device having a battery, the method comprising:
adapting the fuel gauging in the device to a use model, the use model comprising how the device is actually used by a user, wherein adapting the fuel gauging comprises; checking a charge level of the battery each time the battery is replaced to determine whether the battery is fully charged; monitoring a net energy extracted from the battery as a function of time during use of the device by the user; updating an estimated total available battery energy, wherein the estimated total available battery energy is derived from the net energy extracted; and adapting the fuel gauging to the updated estimated total available battery energy, wherein checking the battery charge level comprises; measuring the charge level of the battery; and comparing the measured charge level to an expected charge level range, the expected charge level range being the range for a fully charged battery. - View Dependent Claims (3, 4, 5, 6)
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7. A method of fuel gauging in an electronic device having a battery, the method comprising:
adapting the fuel gauging in the device to a use model, the use model comprising how the device is actually used by a user, wherein adapting the fuel gauging comprises; monitoring a net energy extracted from the battery as a function of time during use of the device by the user; updating an estimated total available battery energy, wherein the estimated total available battery energy is derived from the net energy extracted; and adapting the fuel gauging to the updated estimated total available battery energy, wherein updating an estimated total available energy from the battery comprises computing a moving average of a value for a total of the net energy extracted from a most recently installed battery and a value for a total of the net energy extracted for one or more previously installed batteries.
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8. A method of fuel gauging in an electronic device having a battery, the method comprising:
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checking a charge level of the battery; comparing the checked level to an expected charge level range; updating an estimated total available battery energy comprising computing a moving average of a value for a total of a net energy extracted from a most recently installed battery and a value for a total of the net energy extracted for one or more previously installed batteries; and adapting the fuel gauging in the device to a use model, wherein the use model comprises how the device is actually used by a user, and wherein the battery is non-rechargeable. - View Dependent Claims (9)
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10. A method of fuel gauging in an electronic device having a battery, to method comprising:
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updating an estimated total available battery energy, wherein updating comprises computing a moving average of a value for a total of a net energy extracted from a most recently installed battery and a value for a total of the net energy extracted for one or more previously installed batteries; and adapting the fuel gauging in the device to a use model, wherein the use model comprises how the device is actually used by a user. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An electronic device with use-adaptive fuel gauging, the electronic device using a battery for power, the electronic device comprising:
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a battery monitor that measures a characteristic of the battery; a controller that receives the measured battery characteristic from the battery monitor; a memory tat provides temporary data storage for the controller; a user interface that displays results produced by the controller, and a fuel gauge algorithm stored iii the memory as a computer program, the computer program comprising instructions that, when executed by the controller, check the charge level of a newly installed battery, monitor a net energy extracted from the newly installed battery, update an estimated total available energy, and adapt the fuel gauging to the estimated total available energy, wherein the instructions that update an estimated total available energy comprise instructions that compute a moving average of a value for a total of the net energy extracted from a most recently monitored battery and a value for a total of the net energy extracted for one or more previously monitored batteries. - View Dependent Claims (30, 31, 32, 33, 34)
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35. An electronic device with use-adaptive fuel gauging, the electronic device using a battery for power, the electronic device comprising:
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a battery monitor that measures a characteristic of the battery; a controller that receives the measured battery characteristic from the battery monitor; a memory that provides temporary data storage for the controller; a user interface that displays results produced by the controller; and a fuel gauge algorithm stored in the memory as a computer program, the computer program comprising instructions that when executed by the controller, update an estimated total available energy, and adapt the fuel, gauging in the device to a use model, wherein the instructions that update comprise instructions that compute a moving average of a value for a total of a net energy extracted from a most recently installed battery and a value for a total of the net energy extracted for one or more previously installed batteries, and wherein the use model comprises how the device is actually used by a user.
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Specification