CHARGING SYSTEM FOR ELECTRONIC DEVICE

• US 20140184137A1
• Filed: 12/28/2012
• Published: 07/03/2014
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Lilly Huang
• Inventors: HUANG, Lilly, Proefrock, Wayne L., Ravichandran, Krishnan
• Granted Patent: US 9,184,627 B2
• Time in Patent Office: Days
• US Class Current: 320/101
• CPC Class Codes: H02J 2300/26 involving maximum power point tracking control for photovoltaic sources maximum power point systems in particular G05F1/67
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

A charging system may include a switching device to receive an output voltage from an alternative power source and to provide an output voltage of the charging system, and an algorithm device to provide a control signal to the switching device based on a sensed power from the power source and a sensed output voltage from the charging system.

Claims

1. A charging system comprising:

a switching device to receive an output voltage from a power source and to provide an output voltage from the charging system based at least in part on the output voltage received from the power source; and

an algorithm device to provide a control signal to the switching device based at least in part on a sensed power from the power source and a sensed output voltage from the charging system, the control signal to be provided to the switching device to control the output voltage from the charging system.

2. The charging system of claim 1, wherein the algorithm device to compare a previous sensed power from the power source with a current sensed power from the power source.

3. The charging system of claim 2, wherein the algorithm device to further determine if a difference between the previous sensed power and the current sensed power is greater than a threshold value.

4. The charging system of claim 3, wherein when the difference between the current sensed power and the previous sensed power is greater than the threshold value, then the algorithm device to determine if the current sensed power is greater than the previous sensed power.

5. The charging system of claim 4, wherein when the current sensed power is determined to be greater than the previous sensed power, then the algorithm device to increase a voltage reference value by a pre-defined voltage step.

6. The charging system of claim 5, wherein the when the current sensed power is determined to be less than the previous sensed power, then the algorithm device to set the voltage reference value to the current sensed output voltage.

7. The charging system of claim 6, wherein the algorithm device to determine if the voltage reference is within an allowable voltage boundary.

8. The charging system of claim 7, wherein when the voltage reference is determined to be within the allowable voltage boundary, then the algorithm device to provide the control signal to the switching device.

9. The charging system of claim 7, wherein when the voltage reference is determined to not be within the allowable voltage boundary, then the algorithm device to reset at least one of the voltage boundaries.

10. The charging system of claim 1, wherein the power source is one of a solar power source, a mechanical power source, a photovoltaic power source, a thermal power source, a radio frequency power source, a vibration power source, a biomechanical power source or a fuel cell.

11. The charging system of claim 1, wherein the switching device to adjust impedance of the output voltage from the power source.

12. The charging system of claim 1, wherein the switching device includes at least one transistor and a driver, the driver to receive the control signal from the algorithm device, and the driver to control the at least one transistor based at least in part on the received control signal.

13. The charging system of claim 1, wherein the algorithm device includes a controller to execute an algorithm and to provide the control signal based at least in part on the executed algorithm.

14. An electronic device comprising:

a display device;

a battery charger to charge a battery based on an input voltage; and

a charging system to provide the input voltage to the battery charger, the charging system including;

a switching device to receive power from a power source and to provide an output voltage, and

an algorithm device to provide a control signal to the switching device based on a sensed power from the power source and a sensed output voltage from the switching device, the switching device to receive the control signal and to adjust the output voltage from the switching device based at least in part on the control signal.

15. The electronic device of claim 14, wherein the algorithm device to further determine if a difference between a previous sensed power from the power source and a current sensed power from the power source is greater than a threshold value.

16. The electronic device of claim 15, wherein when the difference between the current sensed power and the previous sensed power is greater than the threshold value, then the algorithm device to determine if the current sensed power is greater than the previous sensed power.

17. The electronic device of claim 16, wherein when the current sensed power is determined to be less than the previous sensed power, then the algorithm device to set a voltage reference value to the current sensed output voltage.

18. The electronic device of claim 17, wherein in response to the algorithm device determining that the voltage reference is within an allowable voltage boundary, then the algorithm device to provide the control signal to the switching device.

19. The electronic device of claim 14, wherein the switching device to adjust impedance of the power from the power source.

20. The electronic device of claim 14, wherein the switching device includes at least one transistor and a driver, the driver to receive the control signal from the algorithm device, and the driver to control the transistor based at least in part on the received control signal.

21. The electronic device of claim 14, wherein the algorithm device includes a controller to execute an algorithm and to provide the control signal based at least in part on the executed algorithm.

22. A charging method of an electronic device comprising:

receiving power from a power source;

sensing the power from the power source;

receiving the power at a switching circuit;

providing an output voltage from the switching circuit based at least in part on the sensed power from the power source;

sensing the output voltage from the switching circuit;

providing a control signal to the switching circuit based at least in part on the sensed power from the power source and the sensed output voltage from the switching circuit; and

adjusting the output voltage from the switching circuit based at least in part on the control signal.

23. The charging method of claim 22, further comprising comparing a previous sensed power from the power source with a current sensed power from the power source.

24. The charging method of claim 23, further comprising determining if a difference between the previous sensed power and the current sensed power is greater than a threshold value;

and

when the difference between the current sensed power and the previous sensed power is greater than the threshold value, determining if the current sensed power is greater than the previous sensed power.

25. The charging method of claim 24, wherein when the current sensed power is determined to be less than the previous sensed power, setting a voltage reference value to the current sensed output voltage.

26. The charging method of claim 25, wherein when the voltage reference is determined to be within an allowable voltage boundary, providing the control signal to the switching circuit.

27. The charging method of claim 26, wherein when the voltage reference is determined to not be within the allowable voltage boundary, resetting at least one of the voltage boundaries.

28. The charging method of claim 22, wherein providing the output voltage includes adjusting impedance of the power received from the power source.

29. The charging method of claim 22, wherein providing the control signal includes executing an algorithm and using the sensed power from the power source and the sensed output voltage from the switching circuit to provide the control signal.

30. The charging method of claim 22, further comprising providing the adjusted output voltage to a load of the electronic device.