Advanced convectively-cooled inductive charging

• US 10,283,999 B2
• Filed: 07/19/2016
• Issued: 05/07/2019
• Est. Priority Date: 02/26/2015
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Helberg, Chris, North, Travis C., Sultenfuss, Andrew, Shelnutt, Austin M.
• Primary Examiner(s): Pelton, Nathaniel R
• Assistant Examiner(s): Dibenedetto, Michael N
• Application Number:
  US15/213,780
• Publication Number:
  US 20160329735A1
• Time in Patent Office: 1,022 Days
• Field of Search: 320108, 336 55, 336 57, 336 58, 336 84 R, 336 84 M, 336 94
• CPC Class Codes: H01F 27/08 Cooling heat-transfer elements F28F; Ventilating structural details of casings H01F27/02
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 7/007192 in response to temperature
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H05K 7/2039 characterised by the heat transfer by conduction from the heat generating element to a dissipating body arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00

Abstract

An information handling system (IHS) includes a base station that has a transmitter coil to generate a magnetic field for charging a portable power source of a battery-powered electronic device. A receiver coil magnetically receives power from the transmitter coil of the base station. A power control module connected to the portable power source and the receiver coil charges the portable power source with the received power. A flexible ferrite shield is positioned on a side of the receiver coil opposite to the transmitter coil to shield the IHS electronics. A pneumatic diaphragm is formed by a portion of the flexible ferrite shield that is positioned for oscillating movement into a center cavity of the receiver coil. A diaphragm actuator is attached to the pneumatic diagram and is responsive to a triggering signal to oscillate the pneumatic diaphragm to disperse thermal energy that is generated by the receiver coil.

Claims

1. An information handling system (IHS) comprising:

a portable power source;

IHS electronics that are powered by the portable power source;

a receiver coil to magnetically receive power from a transmitter coil that is located within a proximate range of the receiver coil;

a power control module connected to the portable power source and the receiver coil to charge the portable power source with received power from the receiver coil; and

a pneumatic diaphragm positioned on a side of the receiver coil opposite to a location of the transmitter coil to shield the IHS electronics, the flexible ferrite shield further configured to use the pneumatic diaphragm to support dispersal of thermal energy generated by the receiver coil, wherein the pneumatic diaphragm is a portion of a flexible ferrite shield and is positioned for oscillating movement into a center cavity of the receiver coil.

2. The IHS of claim 1, further comprising:

a temperature sensor to sense a temperature that is proximate to the receiver coil; and

a communication component electrically connected to the temperature sensor and which receives the sensed temperature, the communication component being in wireless communication with component that contains the transmitter coil to communicate feedback that is representative of the sensed temperature to cause the component to vary a frequency of the magnetic field, which varies a duty cycle of the oscillations of the pneumatic diaphragm.

3. The IHS of claim 2, further comprising a diaphragm driver that generates and transmits the triggering signal to an actuator of the pneumatic diaphragm.

4. The IHS of claim 3, further comprising a temperature sensor which senses a temperature that is proximate to the receiver coil, wherein the diaphragm driver varies a duty cycle of the triggering signal based on a value of the sensed temperature.

5. The IHS of claim 3, wherein the diaphragm driver is enabled by magnetic fields that are transmitted by the transmitter coil.

6. The IHS of claim 3, wherein the diaphragm actuator comprises at least one of a piezoelectric actuator and an electromechanical actuator.

7. The IHS of claim 2, further comprising:

a diaphragm actuator attached to the pneumatic diagram and which responds to a triggering signal to oscillate the pneumatic diaphragm to disperse thermal energy that is generated by the receiver coil.

8. The IHS of claim 7, wherein:

the triggering signal is a magnetic field that is transmitted by the transmitter coil; and

the diaphragm actuator comprises a magnetically responsive material to mechanically respond to the magnetic field by oscillating.

9. An information handling system (IHS) comprising:

electronics that require electrical power;

a Wirelessly Rechargeable Battery-Powered (WRBP) device comprising;

a portable power source that provide electrical power for powering the electronics;

a receiver coil that magnetically receives power from a transmitter coil;

a power control module connected to the portable power source and the receiver coil to charge the portable power source with the received power;

a pneumatic diaphragm positioned on a side of the receiver coil opposite to a location of the transmitter coil to shield the IHS electronics and which is further configured to use the pneumatic diaphragm to provide dispersal of thermal energy generated by the receiver coil, wherein the pneumatic diaphragm is a portion of a flexible ferrite shield and is positioned for oscillating movement into a center cavity of the receiver coil.

10. The IHS of claim 9, further comprising a diaphragm actuator that is attached to the pneumatic diagram and that is responsive to a triggering signal to oscillate the pneumatic diaphragm to disperse thermal energy that is generated by the receiver coil.

11. The IHS of claim 9, further comprising:

a power conversion unit that controls a frequency of the magnetic field generated by a transmitter coil;

a temperature sensor to sense a temperature value in one of a base station hosting the transmitter coil and the WRBP device; and

a processor in electrical communication with the temperature sensor to receive the temperature value and in electrical communication with the power conversion unit to vary the magnetic field in frequency to vary a duty cycle of the oscillations of the pneumatic diaphragm of the WRBP device.

12. The IHS of claim 11, wherein the power conversion unit and transmitter coil perform at least one of (i) magnetic induction energy transfer;

and (ii) magnetic resonance energy transfer.

13. A method of providing wireless energy transfer for powering an information handling system (IHS), the method comprising:

receiving, via a receiver coil located inside of the IHS, a magnetic field from an external transmitter coil;

charging a portable power source with the received power from the receiver coil to power IHS equipment; and

triggering a diaphragm actuator that is attached to a pneumatic diaphragm to oscillate the pneumatic diaphragm to disperse thermal energy that is generated by the receiver coil, the pneumatic diaphragm being a portion of a flexible ferrite shield and is positioned for oscillating movement into a center cavity of the receiver coil.

14. The method of claim 13, wherein:

the diaphragm actuator comprises a magnetically responsive material; and

triggering the diaphragm actuator comprises the magnetic field of the transmitter coil causing a mechanical oscillation of the diaphragm actuator and the attached pneumatic diaphragm.

15. The method of claim 13, wherein the IHS is a WRBP device that can dock to a separate base station, the method further comprising:

sensing a temperature value in one of the base station and the WRBP device; and

varying the magnetic field in frequency to vary a duty cycle of the oscillations of the pneumatic diaphragm.

16. The method of claim 13, wherein triggering the diaphragm actuator comprises:

detecting, by the WRBP device, the magnetic field that is transmitted by the transmitter coil; and

electrically actuating the diaphragm actuator in response to detecting the magnetic field.

17. The method of claim 13, wherein triggering the diaphragm actuator comprises electrically actuating at least one of a piezoelectric actuator and an electromechanical actuator.

18. The method of claim 13, wherein receiving the magnetic field comprises receiving at least one of magnetic induction energy transfer and magnetic resonance energy transfer.