Peak power caching in a wireless power system

• US 9,876,382 B2
• Filed: 09/01/2015
• Issued: 01/23/2018
• Est. Priority Date: 09/01/2015
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Sultenfuss, Andrew T.
• Primary Examiner(s): Dinh, Paul
• Application Number:
  US14/842,795
• Publication Number:
  US 20170063135A1
• Time in Patent Office: 875 Days
• Field of Search: 320108, 320148-149
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 7/04 Regulation of charging current or voltage
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices

Abstract

An information handling system includes a wireless charging module, a capacitor, and a control module. The wireless charging module receives wireless power from a wireless charging pad, and provides power to other components in the information handling system. The control module receives a turbo mode request, and determines whether the wireless charging module of the information handling system has sufficient power delivery capability to enable a turbo mode of the information handling system. The wireless power charging module provides power to the capacitor in response to the turbo mode request being received and the wireless charging module having sufficient power delivery capability. The control module determines whether a first voltage of the capacitor is substantially equal to a second voltage of a second capacitor in the information handling system, and in response to the first voltage being substantially equal to the second voltage the capacitor to provide power for the turbo mode.

Claims

1. A method comprising:

receiving, at a control module of an information handling system, a turbo mode request to operate a central processing unit of the information handling system in a turbo mode;

determining, by the control module, whether a wireless charging module of the information handling system has sufficient power delivery capability to enable a turbo mode of the information handling system;

providing power to a capacitor in response to receiving the turbo mode request and determining that the wireless charging module has sufficient power delivery capability;

determining whether a first voltage of the capacitor is substantially equal to a second voltage of a second capacitor in the information handling system; and

providing, from the capacitor, power to the central processing unit for the turbo mode in response to the first voltage being substantially equal to the second voltage.

2. The method of claim 1, further comprising:

detecting a start of a power delivery cycle prior to providing the power from the capacitor.

3. The method of claim 1, further comprising:

receiving, at an antenna of the wireless charging module, wireless power from an antenna of a wireless charging pad; and

providing, by a wireless charger of the wireless charging module, power to the central processing unit of the information handling system.

4. The method of claim 1, wherein determining whether the wireless charging module of the information handling system has sufficient power delivery capability comprises:

comparing a power delivery capability of the wireless charging module to a threshold; and

determining that the wireless charging module has sufficient power delivery capability in response to the power delivery capability of the wireless charging module being above the threshold.

5. The method of claim 1, further comprising:

disabling a turbo mode in response to an end of a power delivery cycle subsequent to the power being delivered from the capacitor.

6. The method of claim 1, wherein the power is provided to the capacitor from a wireless charger of the wireless charging module.

7. The method of claim 1, wherein the power is provided to the capacitor from a battery of the wireless charging module.

8. An information handling system comprising:

a wireless charging module to receive wireless power from a wireless charging pad, and to provide power to other components in the information handling system;

a capacitor coupled to the wireless charging module; and

a control module coupled to the wireless charging module, the control module to receive a turbo mode request to operate a central processing unit of the information handling system in a turbo mode, to determine whether the wireless charging module of the information handling system has sufficient power delivery capability to enable a turbo mode of the information handling system, in response to the turbo mode request being received and the wireless charging module having sufficient power delivery capability, the wireless power charging module to provide power to the capacitor, the control module to determine whether a first voltage of the capacitor is substantially equal to a second voltage of a second capacitor in the information handling system, and in response to the first voltage being substantially equal to the second voltage the capacitor to provide power to the central processing unit for the turbo mode.

9. The information handling system of claim 8, further comprising:

a switch having a first terminal coupled to the capacitor and a second terminal coupled to a voltage regulator, the control module further to detect a start of a power delivery cycle, and to close the switch in response to the start of the power delivery cycle to enable the capacitor to provide the power to the voltage regulator.

10. The information handling system of claim 8, wherein the wireless charging module comprising:

an antenna to receive the wireless power from an antenna of the wireless charging pad; and

a wireless charger coupled to the antenna, the wireless charger to provide power to a central processing unit of the information handling system.

11. The information handling system of claim 8, the control module further to compare a power delivery capability of the wireless charging module to a threshold, and to determine that the wireless charging module has sufficient power delivery capability in response to the power delivery capability of the wireless charging module being above the threshold.

12. The information handling system of claim 8, the control module further to detect an end of a power delivery cycle subsequent to the power being delivered from the capacitor.

13. The information handling system of claim 12, the control module further to disable a turbo mode in response to the end of the power delivery cycle being detected.

14. The information handling system of claim 8, wherein the power is provided to the capacitor from a battery of the wireless charging module.

15. A method comprising:

receiving, at an antenna of a wireless charging module of an information handling system, wireless power from an antenna of a wireless charging pad;

receiving, at a control module of the information handling system, a turbo mode request to operate a central processing unit of the information handling system in a turbo mode;

comparing, by the control module, a power delivery capability of the wireless charging module to a threshold;

determining, at the control module, that the wireless charging module has sufficient power delivery capability in response to the power delivery capability of the wireless charging module being above the threshold;

providing power to a capacitor in response to receiving the turbo mode request and determining that the wireless charging module has sufficient power delivery capability;

determining whether a first voltage of the capacitor is substantially equal to a second voltage of a second capacitor in the information handling system; and

providing, from the capacitor, power to the central processing unit for the turbo mode in response to the first voltage being substantially equal to the second voltage.

16. The method of claim 15, further comprising:

detecting a start of a power delivery cycle prior to providing the power from the capacitor.

17. The method of claim 15, further comprising:

providing, by a wireless charger of the wireless charging module, power to the central processing unit of the information handling system.

18. The method of claim 15, further comprising:

disabling a turbo mode in response to an end of a power delivery cycle subsequent to the power being delivered from the capacitor.

19. The method of claim 15, wherein the power is provided to the capacitor from a wireless charger of the wireless charging module.

20. The method of claim 15, wherein the power is provided to the capacitor from a battery of the wireless charging module.