METHOD AND APPARATUS FOR WIRELESSLY RECHARGING BATTERIES

• US 20150380977A1
• Filed: 06/29/2015
• Published: 12/31/2015
• Est. Priority Date: 06/27/2014
• Status: Active Grant

• Current Assignee: Superior Communications (Sinclair Broadcast Group Incorporated)
• Original Assignee: Superior Communications (Sinclair Broadcast Group Incorporated)
• Inventors: Sentosa, Samuel, Su, David P., Chen, George
• Granted Patent: US 9,780,600 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0032 disconnection of loads if battery is not under charge, e.g. in vehicle if engine is not running
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

A wireless charging unit for a mobile device unit. The wireless charging unit may include an interface surface for the mobile device unit to be positioned upon, and a power transmitter device configured to transmit power wirelessly to the mobile device unit when the mobile device unit is positioned upon the interface surface to charge the mobile device unit. A switch may be electrically coupled to a power connector plug and configured to disable reception of power by the power connector plug from a power outlet in response to a sensor circuit detecting that the mobile device unit has been removed from the interface surface to a distance.

Claims

1. A wireless charging unit for a mobile device unit comprising:

an interface surface for the mobile device unit to be positioned upon;

a power transmitter device configured to transmit power wirelessly to the mobile device unit when the mobile device unit is positioned upon the interface surface to charge the mobile device unit;

a power connector plug configured to receive power from a power outlet for powering the power transmitter device;

a sensor circuit configured to detect that the mobile device unit has been removed from the interface surface to a distance away from the interface surface; and

a switch electrically coupled to the power connector plug and configured to disable reception of power by the power connector plug from the power outlet in response to the sensor circuit detecting that the mobile device unit has been removed from the interface surface to the distance.

2. The unit of claim 1, wherein the wireless charging unit includes a housing that the power transmitter device, the sensor circuit, and the switch are positioned within, with the power outlet being positioned external to the housing.

3. The unit of claim 2, wherein the interface surface is an upper surface of the housing.

4. The unit of claim 2, wherein the switch is configured such that the disabling of the reception of power by the power connector plug from the power outlet by the switch disables any power exterior to the housing from being drawn by the wireless charging unit.

5. The unit of claim 1, wherein the power transmitter device is configured to transmit power wirelessly to the mobile device unit inductively.

6. The unit of claim 5, wherein the power transmitter device is configured to transmit power wirelessly to the mobile device unit through a magnetic resonant coupling with a power receiver device of the mobile device unit.

7. The unit of claim 1, wherein the switch is a latching relay.

8. The unit of claim 1, wherein the sensor circuit is configured to detect that the mobile device unit has been removed from the interface surface to a distance away from the interface surface by detecting a variation in inductance of the power transmitter device.

9. The unit of claim 1, wherein the sensor circuit includes a capacitive sensor, and the sensor circuit is configured to detect that the mobile device unit has been removed from the interface surface based on a signal produced by the capacitive sensor.

10. The unit of claim 1, wherein the wireless charging unit includes a mechanical trigger, and the sensor circuit is configured to detect that the mobile device unit has been removed from the interface surface based on reduced contact with the mechanical trigger.

11. The unit of claim 1, wherein the sensor circuit includes a radio frequency identification tag sensor configured to sense a radio frequency identification tag positioned on the mobile device unit, and the sensor circuit is configured to detect that the mobile device unit has been removed from the interface surface based on a signal produced by the radio frequency identification tag sensor.

12. The unit of claim 1, wherein the wireless charging unit includes a battery for powering the sensor circuit when the switch has disabled the reception of power by the power connector plug from the power outlet.

13. The unit of claim 1, wherein the sensor circuit is configured to detect that the mobile device unit has been positioned within a distance of the interface surface;

and

the switch is configured to enable reception of power by the power connector plug from the power outlet in response to the sensor circuit detecting that the mobile device unit has been positioned within the distance of the interface surface.

14. A system for wirelessly charging a mobile device comprising:

a power receiver device configured to couple to the mobile device and receive power wirelessly for charging the mobile device;

an interface surface for the power receiver device to be positioned upon;

a power transmitter device configured to transmit power wirelessly to the power receiver device when the power receiver device is positioned upon the interface surface;

a power connector plug configured to receive power from a power outlet for powering the power transmitter device;

a sensor circuit configured to detect that the mobile device has been removed from the interface surface to a distance away from the interface surface; and

a switch electrically coupled to the power connector plug and configured to disable reception of power by the power connector plug from the power outlet in response to the sensor circuit detecting that the mobile device has been removed from the interface surface to the distance.

15. The system of claim 14, wherein the power receiver device is connected to a mobile device case for covering at least a portion of the mobile device.

16. The system of claim 14, wherein the power receiver device is configured to be positioned within the mobile device.

17. The system of claim 14, wherein the power receiver device is configured to form a magnetic resonant coupling with the power transmitter device to receive power wirelessly for charging the mobile device.

18. The system of claim 14, wherein the power transmitter device includes at least one wire, and the power receiver device includes at least one wire, the at least one wire of the power transmitter device configured to produce a magnetic field that induces a current in the at least one wire of the power receiver device to transmit power wirelessly to the power receiver device.

19. A method for wirelessly charging a mobile device unit comprising:

positioning a mobile device unit on an interface surface of a wireless charging unit;

charging the mobile device unit wirelessly using a power transmission device of the wireless charging unit, the power transmission device receiving power for charging the mobile device unit from a power source positioned exterior to the wireless charging unit;

removing the mobile device unit from the interface surface to a distance; and

automatically disabling the wireless charging unit from receiving power from the power source in response to the mobile device unit being removed from the interface surface to the distance.

20. The method of claim 19, further comprising the steps of:

positioning the mobile device unit within a distance of the interface surface; and

automatically enabling the wireless charging unit to receive power from the power source in response to the mobile device unit being positioned within the distance of the interface surface.