WIRELESS CHARGING DEVICE AND WIRELESS CHARGING METHOD

• US 20170033588A1
• Filed: 10/12/2015
• Published: 02/02/2017
• Est. Priority Date: 07/27/2015
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Wu, Wen-Chin, Kao, Yi-Sheng, Chang, Yao-Tsung
• Granted Patent: US 9,774,212 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 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A wireless charging device includes a base, a motor, a rotating member and a first transmitting coil. The base has a hollow pillar and a ring-shaped groove around the hollow pillar. The motor is movably disposed in the hollow pillar and has a rotating axle. The rotating member is connected to a first end of the rotating axle. The first transmitting coil is disposed on the rotating member. When an electronic device is placed in the ring-shaped groove, the motor drives the first transmitting coil to move and rotate to a position corresponding to a receiving coil of the electronic device, such that the first transmitting coil cooperates with the receiving coil to charge the electronic device.

Claims

1. A wireless charging device comprising:

a base having a hollow pillar and a ring-shaped groove around the hollow pillar;

a motor movably disposed in the hollow pillar, the motor having a rotating axle;

a rotating member connected to a first end of the rotating axle; and

a first transmitting coil disposed on the rotating member;

wherein when an electronic device is placed in the ring-shaped groove, the motor drives the first transmitting coil to move and rotate to a position corresponding to a receiving coil of the electronic device, such that the first transmitting coil cooperates with the receiving coil to charge the electronic device.

2. The wireless charging device of claim 1, further comprising a screw nut disposed in the hollow pillar, a second end of the rotating axle having an external screw thread, such that the second end of the rotating axle is rotatably connected to the screw nut, the first end being opposite to the second end.

3. The wireless charging device of claim 1, wherein the base further has a restraining hole located in the hollow pillar and the motor further has a restraining pillar movably disposed in the restraining hole.

4. The wireless charging device of claim 1, wherein before charging the electronic device, the motor drives the first transmitting coil to move and rotate to a plurality of heights and a plurality of directions, the first transmitting coil detects a plurality of loads for the heights and the directions, the height and the direction where a maximum value of the loads is located at represent the position corresponding to the receiving coil of the electronic device.

5. The wireless charging device of claim 4, wherein when a plurality of the electronic devices are disposed in the ring-shaped groove, the heights and the directions where a plurality of peak values of the loads are located at represent the positions corresponding to the receiving coils of the electronic devices.

6. The wireless charging device of claim 4, further comprising:

a circuit board disposed in the hollow pillar, the first transmitting coil being electrically connected to the circuit board;

a control unit disposed on the circuit board, the control unit controlling the motor;

a calculating unit disposed on the circuit board, the calculating unit determining intensity of the loads; and

a memory unit disposed on the circuit board, the memory unit recording the heights, the directions and the loads.

7. The wireless charging device of claim 1, further comprising a detecting unit disposed on the rotating member, wherein before charging the electronic device, the motor drives the first transmitting coil to move and rotate to a plurality of heights and a plurality of directions, the detecting unit detects a plurality of loads for the heights and the directions, the height and the direction where a maximum value of the loads is located at represent the position corresponding to the receiving coil of the electronic device.

8. The wireless charging device of claim 7, wherein when a plurality of the electronic devices are disposed in the ring-shaped groove, the heights and the directions where a plurality of peak values of the loads are located at represent the positions corresponding to the receiving coils of the electronic devices.

9. The wireless charging device of claim 7, further comprising:

a circuit board disposed in the hollow pillar, the first transmitting coil being electrically connected to the circuit board;

a control unit disposed on the circuit board, the control unit controlling the motor;

a calculating unit disposed on the circuit board, the calculating unit determining intensity of the loads; and

a memory unit disposed on the circuit board, the memory unit recording the heights, the directions and the loads.

10. The wireless charging device of claim 1, further comprising a second transmitting coil disposed on the rotating member and opposite to the first transmitting coil.

11. The wireless charging device of claim 10, wherein a wireless charging standard of the first transmitting coil is identical to a wireless charging standard of the second transmitting coil.

12. The wireless charging device of claim 10, wherein a wireless charging standard of the first transmitting coil is different from a wireless charging standard of the second transmitting coil.

13. A wireless charging method adapted to a wireless charging device, the wireless charging device comprising a base, a motor, a rotating member and a transmitting coil, the base having a hollow pillar and a ring-shaped groove around the hollow pillar, the motor being movably disposed in the hollow pillar, the motor having a rotating axle, the rotating member being connected to the rotating axle, the first transmitting coil being disposed on the rotating member, the wireless charging method comprising:

when an electronic device is placed in the ring-shaped groove, the motor driving the transmitting coil to move and rotate to a plurality of heights and a plurality of directions;

detecting a plurality of loads for the heights and the directions, wherein the height and the direction where a maximum value of the loads is located at represent a position corresponding to a receiving coil of the electronic device;

the motor driving the transmitting coil to move and rotate to the position corresponding to the receiving coil of the electronic device; and

the transmitting coil cooperating with the receiving coil to charge the electronic device.

14. The wireless charging method of claim 13, wherein when a plurality of the electronic devices are disposed in the ring-shaped groove, the heights and the directions where a plurality of peak values of the loads are located at represent the positions corresponding to the receiving coils of the electronic devices.

15. The wireless charging method of claim 14, wherein when the plurality of the electronic devices are disposed in the ring-shaped groove, the wireless charging method further comprises:

charging the electronic device having a maximum amount of power first.

16. The wireless charging method of claim 14, wherein when the plurality of the electronic devices are disposed in the ring-shaped groove, the wireless charging method further comprises:

charging the electronic device having a minimum amount of power first.

17. The wireless charging method of claim 14, wherein when the plurality of the electronic devices are disposed in the ring-shaped groove, the wireless charging method further comprises:

charging the electronic device having a shortest distance with respect to the transmitting coil first.

18. The wireless charging method of claim 14, wherein when the plurality of the electronic devices are disposed in the ring-shaped groove, the wireless charging method further comprises:

charging the electronic device detected prior to other electronic devices first.