System and method for providing wireless power feedback in a wireless power delivery system

• US 10,067,546 B2
• Filed: 11/16/2015
• Issued: 09/04/2018
• Est. Priority Date: 05/18/2012
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Sultenfuss, Andrew T., Markow, Mitchell
• Primary Examiner(s): Huynh, Kim Ngoc
• Assistant Examiner(s): Chan, Danny
• Application Number:
  US14/942,662
• Publication Number:
  US 20160070322A1
• Time in Patent Office: 1,023 Days
• Field of Search: None
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/30 using light, e.g. lasers
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power delivery system includes a wireless power source and a control module. The wireless power source provides power to an information handling system. The control module is in communication with the wireless power source, and is configured to detect a presence signal from the information handling system, to set an output power level for the information handling system based on the presence signal, to receive a signal from the information handling system, and to adjust the output power level based on the signal.

Claims

1. An information handling system comprising:

a wireless charger to receive power from a first wireless charging pad based on a first power state of the information handling system, and to provide the power to the information handling system;

a second wireless charging pad to receive the power from the wireless charger, to detect a first presence signal of a second information handling system, to determine a second power state for the second information handling system based on the first presence signal, to provide power to the second information handling system based on the second power state, to receive a first indication that the second information handling system does not need power in response to a flag being set when a battery of the second information handling system is fully charged, wherein the flag is cleared in response to the second information handling system no longer being in communication with the second wireless charging pad; and

a hardware control circuit to communicate with the wireless charger, the hardware control circuit to provide the first power state to the first wireless charging pad, to receive an adjust signal from the first wireless charging pad indicating a change in an amount of power available for the information handling system from the first wireless charging pad, and to change an operating mode of the information handling system in response to the change in the amount of power available.

2. The information handling system of claim 1 further comprising:

an antenna in communication with the wireless charger, the antenna to wirelessly receive the power from the wireless charging pad.

3. The information handling system of claim 1 further comprising:

an information tag to transmit a second presence signal to the first wireless charging pad, wherein the second presence signal includes a presence indication of the information handling system.

4. The information handling system of claim 3 wherein the presence signal further includes a maximum power requirement of the information handling system.

5. The information handling system of claim 1 further comprising:

an antenna to communicate with the hardware control module, the antenna to transmit the first power state to the wireless charging pad.

6. An information handling system comprising:

a wireless charger to receive power from a first wireless charging pad based on a first power state of the information handling system, and to provide the power to the information handling system;

a second wireless charging pad to receive the power from the wireless charger, to detect a first presence signal of a second information handling system, to determine a second power state for the second information handling system based on the first presence signal, to provide power to the second information handling system based on the second power state, to combine the second power state with the first power state to create a third power state, to provide the third power state to the first wireless charging pad, to receive a first indication that the second information handling system does not need power in response to a flag being set when a battery of the second information handling system is fully charged, wherein the flag is cleared in response to the second information handling system no longer being in communication with the second wireless charging pad; and

a hardware control circuit to communicate with the wireless charger, the hardware control circuit to provide the first power state to the first wireless charging pad, to receive an adjust signal from the first wireless charging pad indicating a change in an amount of power available for the information handling system from the first wireless charging pad, and to change an operating mode of the information handling system in response to the change in the amount of power available.

7. The information handling system of claim 6 further comprising:

an antenna in communication with the wireless charger, the antenna to wirelessly receive the power from the wireless charging pad.

8. The information handling system of claim 6 further comprising:

an information tag to transmit a second presence signal to the first wireless charging pad, wherein the second presence signal includes a presence indication of the information handling system.

9. The information handling system of claim 8 wherein the second presence signal further includes a maximum power requirement of the information handling system.

10. The information handling system of claim 6 further comprising:

an antenna to communicate with the hardware control module, the antenna to transmit the first power state to the first wireless charging pad.

11. A method comprising:

providing a first presence signal to a first wireless charging pad;

receiving, at an antenna of the first information handling system, power based on the first presence signal;

receiving, at a second wireless charging pad of the first information handling system, a second presence signal from a second information handling system;

determining a first power state for the second information handling system based on the second presence signal;

providing, by the second wireless charging pad, power to the second information handling system based on the first power state;

receiving a first indication that the second information handling system does not need power in response to a flag being set when a battery of the second information handling system is fully charged, wherein the flag is cleared in response to the second information handling system no longer being in communication with the second wireless charging pad;

detecting a change in an amount of power available for the information handling system;

sending an adjustment signal to the information handling system indicating the change in the amount of power available to the information handling system; and

changing an operating mode of the information handling system in response to the change in the amount of power available.

12. The method of claim 11 wherein the change in the amount of power available to the information handling system is based on a priority of the information handling system as compared to another information handling system in communication with the wireless charging pad.

13. The method of claim 11 wherein the first presence signal includes a presence indication and a maximum power requirement of the first information handling system.

14. The method of claim 11 wherein the second presence signal includes a presence indication and a maximum power requirement of the second information handling system.

15. The method of claim 11 further comprising:

receiving the power from a direct current power source prior to setting an output power level for the information handling system; and

adjusting the power to the output power level based on the presence signal.