ADVANCED CONVECTIVELY-COOLED INDUCTIVE CHARGING

• US 20160254690A1
• Filed: 02/26/2015
• Published: 09/01/2016
• 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: SULTENFUSS, ANDREW, SHELNUTT, AUSTIN M., HELBERG, CHRIS, NORTH, TRAVIS C.
• Granted Patent: US 9,438,071 B1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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;

a flexible ferrite shield that is positioned on a side of the receiver coil opposite to a location of the transmitter coil to shield the IHS electronics;

a pneumatic diaphragm comprising a portion of the flexible ferrite shield that is positioned for oscillating movement into a center cavity of the receiver coil; and

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.

2. The IHS of claim 1, 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.

3. 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 a base station that contains the transmitter coil to communicate feedback that is representative of the sensed temperature to cause the base station to vary a frequency of the magnetic field, which varies a duty cycle of the oscillations of the pneumatic diaphragm.

4. The IHS of claim 1, further comprising a diaphragm driver to generate and to transmit the triggering signal to the diaphragm actuator.

5. The IHS of claim 4, further comprising a temperature sensor to sense 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.

6. The IHS of claim 4, wherein the diaphragm driver is enabled by magnetic fields that are transmitted by the transmitter coil.

7. The IHS of claim 1, wherein the diaphragm actuator comprises a piezoelectric actuator.

8. The IHS of claim 1, wherein the diaphragm actuator comprises an electromechanical actuator.

9. An information handling system (IHS) comprising:

a base station comprising;

a transmitter coil to generate an magnetic field; and

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

a portable power source;

an IHS electronics that are powered by the portable power source;

a receiver coil to magnetically receive power from the 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 flexible ferrite shield that is positioned on a side of the receiver coil opposite to the transmitter coil to shield the IHS electronics;

a pneumatic diaphragm comprising a portion of the flexible ferrite shield that is positioned for oscillating movement into a center cavity of the receiver coil; and

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.

10. The IHS of claim 9, wherein the base station further comprises:

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

a temperature sensor to sense a temperature value in one of the base station 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.

11. The IHS of claim 10, wherein the power conversion unit and transmitter coil perform magnetic induction energy transfer.

12. The IHS of claim 10, wherein the power conversion unit and transmitter coil perform magnetic resonance energy transfer.

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

a receiver coil, located inside of the IHS, receiving a magnetic field from an external transmitter coil, wherein the receiver coil is shielded on a side opposite to the transmitter coil by a flexible ferrite shield having a portion that comprises a pneumatic diaphragm positioned for oscillating movement into a center cavity of the receiver 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 the pneumatic diaphragm to oscillate the pneumatic diaphragm to disperse thermal energy that is generated by 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 mechanically oscillating the diaphragm actuator and the attached pneumatic diaphragm.

15. The method of claim 14, 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 16, wherein triggering the diaphragm actuator comprises electrically actuating a piezoelectric actuator.

18. The method of claim 16, wherein triggering the diaphragm actuator comprises electrically actuating an electromechanical actuator.

19. The method of claim 13, wherein receiving the magnetic field comprises receiving magnetic induction energy transfer.

20. The method of claim 13, wherein receiving the magnetic field comprises receiving magnetic resonance energy transfer.