IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0973450
(2010-12-20)
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등록번호 |
US-8639954
(2014-01-28)
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발명자
/ 주소 |
- Winkler, David A.
- Johnson, Robert M.
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
11 |
초록
▼
A portable electronic device employs a method for recovering power to a rechargeable battery used therein when the battery is in a low state of charge. The portable electronic device includes at least a power management subsystem (PMS), a main processor subsystem, and the battery. When the battery i
A portable electronic device employs a method for recovering power to a rechargeable battery used therein when the battery is in a low state of charge. The portable electronic device includes at least a power management subsystem (PMS), a main processor subsystem, and the battery. When the battery is incapable of supplying boot-up power to the processor subsystem, power is provided from a battery charger to the PMS to power-up the PMS. The PMS then determines the battery's type and a state-of-charge (SOC) parameter for the battery, and compares the SOC parameter to a threshold, which is based on at least the battery type. If the SOC parameter is less than the threshold, power is provided from the battery charger to the battery for use in recharging the battery. Otherwise, power is supplied from the battery to the processor subsystem to facilitate general operation of the portable electronic device.
대표청구항
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1. A method for recovering power to a rechargeable battery in a portable electronic device when the battery is in a low state of charge, the battery being of a determinable battery type, the method comprising: providing power from a battery charger to a power management subsystem to power-up the pow
1. A method for recovering power to a rechargeable battery in a portable electronic device when the battery is in a low state of charge, the battery being of a determinable battery type, the method comprising: providing power from a battery charger to a power management subsystem to power-up the power management subsystem;after power-up of the power management subsystem, retrieving, by the power management subsystem, stored state-of-charge information for the battery;determining, by the power management subsystem, a battery type for the battery based on the retrieved state-of-charge information;determining, by the power management subsystem, a then-current state-of-charge parameter for the battery;comparing, by the power management subsystem, the then-current state-of-charge parameter for the battery to a threshold, wherein the threshold is based on at least the battery type;in the event that the then-current state-of-charge parameter for the battery is less than the threshold, providing power from the battery charger to the battery for use in recharging the battery; andin the event that the then-current state-of-charge parameter for the battery is greater than or equal to the threshold, supplying power from the battery to a processor subsystem that controls general operation of the portable electronic device, the processor subsystem having greater power requirements than the power management subsystem. 2. The method of claim 1, further comprising: after the battery has been recharging for a predetermined time period, re-determining, by the power management subsystem, the then-current state-of-charge parameter for the battery. 3. The method of claim 1, wherein the threshold is based on at least the battery type and an amount of power required by the processor subsystem. 4. The method of claim 1, further comprising: determining, by the power management subsystem, a type for the battery charger;wherein providing power from the battery charger to the battery for use in recharging the battery includes: providing power from the battery charger to the battery based on at least the battery type and the battery charger type. 5. The method of claim 4, further comprising: determining, by the power management subsystem, a temperature of the battery,wherein providing power from the battery charger to the battery for use in recharging the battery includes: providing power from the battery charger to the battery based on at least the battery type, the battery charger type, and the battery temperature. 6. The method of claim 4, wherein providing power from the battery charger to the battery for use in recharging the battery further comprises: adapting a charging profile for voltage and current supplied from the battery charger to the battery based on at least one of the battery type and the battery charger type. 7. The method of claim 1, wherein providing power from the battery charger to the battery for use in recharging the battery comprises: adapting a charging profile for voltage and current supplied from the battery charger to the battery based on at least the battery type. 8. The method of claim 1, further comprising: determining, by the power management subsystem, a type for the battery charger; andwhen the battery charger is a Universal Serial Bus (USB) type charger, requesting, by the power management subsystem, maximum power from a USB host device that is sourcing power through the USB type charger. 9. A method for recovering power to a rechargeable battery in a portable electronic device when the battery is in a low state of charge, the battery being of a determinable battery type, the method comprising: receiving power from a battery charger coupled to the portable electronic device to produce received power;providing the received power to a power management subsystem to power-up the power management subsystem;after power-up of the power management subsystem, retrieving, by the power management subsystem, stored state-of-charge information for the battery;determining, by the power management subsystem, a battery type for the battery based on the retrieved state-of-charge information;determining, by the power management subsystem, a then-current state-of-charge parameter for the battery;comparing, by the power management subsystem, the then-current state-of-charge parameter for the battery to a threshold, wherein the threshold is based on at least the battery type and an amount of power required by a processor subsystem, the processor subsystem controlling general operation of the portable electronic device and having greater power requirements than the power management subsystem;in the event that the then-current state-of-charge parameter for the battery is less than the threshold, providing power from the battery charger to the battery for use in recharging the battery; andin the event that the then-current state-of-charge parameter for the battery is greater than or equal to the threshold, supplying power from the battery to the processor subsystem. 10. The method of claim 9, further comprising: determining, by the power management subsystem, a type for the battery charger; andwhen the battery charger is a Universal Serial Bus (USB) type charger, requesting, by the power management subsystem, maximum power from a USB host device that is sourcing power through the USB type charger. 11. A portable electronic device comprising: a rechargeable battery of a determinable battery type;memory that stores state-of-charge information for the battery;a power source receptor operable to receive power from an external battery charger;a processor subsystem operably coupled to the battery and operable to control general operation of the portable electronic device upon receiving a threshold level of power; anda power management subsystem operably coupled to the power source receptor and the battery, the power management subsystem being operable to: power-up upon receipt of power from the battery charger via the power source receptor;after power-up, retrieve stored state-of-charge information for the battery from the memory;determine a battery type for the battery based on the retrieved state-of-charge information;determine a then-current state-of-charge parameter for the battery;compare the then-current state-of-charge parameter for the battery to a threshold corresponding to the threshold level of power required by the processor subsystem, wherein the threshold is based on at least the battery type;enable power to be supplied from the battery charger to the battery for use in recharging the battery in the event that the then-current state-of-charge parameter for the battery is less than the threshold; andenable power to be supplied from the battery to the processor subsystem in the event that the then-current state-of-charge parameter for the battery is greater than or equal to the threshold;wherein the processor subsystem has greater power requirements than the power management subsystem. 12. The portable electronic device of claim 11, further comprising: memory operably coupled to the power management subsystem and operable to store power requirements information for the processor subsystem,wherein the power management subsystem is further operable to: determine the threshold based on at least the battery type and the power requirements information. 13. The portable electronic device of claim 11, wherein the power management subsystem includes a microcontroller. 14. The portable electronic device of claim 13, wherein the power source receptor is a Universal Serial Bus (USB) connector, wherein the power management subsystem further includes a USB switch operable under control of the microcontroller, and wherein the microcontroller is operable to instruct the USB switch to route data from the USB connector to the processor subsystem. 15. The portable electronic device of claim 11, wherein the battery is of a type having an end of life voltage of at least three volts. 16. The portable electronic device of claim 11, wherein the battery is of a type having an end of life voltage of less than three volts. 17. The portable electronic device of claim 11, wherein the portable electronic device is a wireless communication device. 18. The portable electronic device of claim 11, wherein the then-current state-of-charge parameter for the battery includes at least one of voltage and remaining energy capacity. 19. The portable electronic device of claim 11, wherein the power management subsystem is further operable to: adapt a charging profile for voltage and current supplied from the battery charger to the battery based on at least the battery type. 20. The portable electronic device of claim 11, wherein the power management subsystem is further operable to: determine a type for the battery charger; andadapt a charging profile for voltage and current supplied from the battery charger to the battery based on at least the battery type and the battery charger type. 21. The portable electronic device of claim 11, wherein the power management subsystem is further operable to: determine a type for the battery charger; andwhen the battery charger is a Universal Serial Bus (USB) type charger, request maximum power from a USB host device that is sourcing power through the USB type charger. 22. A portable electronic device comprising: a rechargeable battery of a determinable battery type;memory that stores state-of-charge information for the battery;a connector operable to receive power from a Universal Serial Bus (USB) host device through a USB type battery charger;a processor subsystem operably coupled to the battery and operable to control general operation of the portable electronic device upon receiving a threshold level of power; anda power management subsystem operably coupled to the connector and the battery, the power management subsystem being operable to: power-up upon receipt of power from the connector;after power-up, retrieve stored state-of-charge information for the battery from the memory and request maximum power from the USB host device through the connector and the USB type charger;determine a battery type for the battery based on the retrieved state-of-charge information;determine a then-current state-of-charge parameter for the battery;compare the then-current state-of-charge parameter for the battery to a threshold corresponding to the threshold level of power required by the processor subsystem, wherein the threshold is based on at least the battery type;enable power to be supplied from the connector to the battery for use in recharging the battery in the event that the then-current state-of-charge parameter for the battery is less than the threshold; andenable power to be supplied from the battery to the processor subsystem in the event that the then-current state-of-charge parameter for the battery is greater than or equal to the threshold;wherein the processor subsystem has greater power requirements than the power management subsystem.
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