Transmission coil module for wireless power transmitter

Patent metadata

Field	Value
Publication number	US-9899147-B2
Application number	US-201615367925-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Dec 17, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

Embodiments provide a wireless power transfer technology, and more particularly, provide a method of mounting a transmission coil, which wirelessly transmits power, in a wireless power transmitter. The transmission coil module includes a transmission coil for wirelessly transmitting power, a coil frame including a receptacle for insertion of the transmission coil, a support unit for surrounding the receptacle, and a central fixing plate formed inside the receptacle and corresponding to an inner shape of the transmission coil, and a connector for electrically connecting the transmission coil to a control circuit board, and the support unit and the central fixing plate are integrally formed with each other.

First claim

What is claimed is:

1. A transmission coil module for wirelessly transmitting power comprising:
a top coil;
a first bottom coil and a second bottom coil;
a coil frame receiving the top coil, the first bottom coil and the second bottom coil; and
a shield located below the coil frame,
wherein an upper surface of the coil frame includes a first receptacle for receiving the top coil,
wherein a lower surface of the coil frame includes a second receptacle for receiving the first bottom coil and a third receptacle for receiving the second bottom coil,
wherein the first receptacle includes an area overlapping each of the second receptacle and the third receptacle, and
wherein the shield includes a plurality of functional holes formed at positions corresponding to the top coil, the first bottom coil and the second bottom coil.

2. The transmission coil module according to claim 1 , wherein the overlapping area is 50% or more of a total area of the first receptacle.

3. The transmission coil module according to claim 1 , wherein the coil frame includes a plurality of functional holes formed at positions corresponding to the plurality of functional holes of the shield.

4. The transmission coil module according to claim 1 , further comprising:
a radiator located below the shield.

5. The transmission coil module according to claim 1 , wherein the radiator includes a plurality of functional holes formed at positions corresponding to the plurality of functional holes of the shield.

6. The transmission coil module according to claim 1 , wherein the coil frame includes a plate, which forms the first receptacle and the second receptacle and support the top coil, the first bottom coil and the second bottom coil.

7. The transmission coil module according to claim 6 , wherein the coil frame includes a first central fixing plate having a shape corresponding to an inner shape of the top coil, a second central fixing plate having a shape corresponding to an inner shape of the first bottom coil, and a third central fixing plate having a shape corresponding to an inner shape of the second bottom coil.

8. The transmission coil module according to claim 7 , wherein each of the second central fixing plate and the third central fixing plate has a portion overlapping the first receptacle, and
wherein the first central fixing plate has a portion overlapping the second receptacle and the third receptacle.

9. The transmission coil module according to claim 8 , wherein the support plate, and the first, second and third central fixing plates are integrally formed with each other.

10. The transmission coil module according to claim 1 , wherein the first bottom coil and the second bottom coil are spaced apart from each other in the same plane.

11. The transmission coil module according to claim 1 , further comprising:
a connector connecting the first bottom coil and the second bottom coil to an external control circuit board through the coil frame.

12. The transmission coil module according to claim 11 , wherein the coil frame has an indented side surface such that the connector can be located in the indented side surface.

13. The transmission coil module according to claim 11 , wherein the connector comprises:
an upper terminal connected to lead wires of the top coil, the first bottom coil and the second bottom coil; and
a lower terminal for connecting to an external device.

14. The transmission coil module according to claim 10 , wherein the coil frame includes a lead wire insertion terminal, into which lead wires of the top coil, the first bottom coil and the second bottom coil are inserted.

15. The transmission coil module according to claim 1 , wherein the coil frame includes a fixing hole, into which a fixing member for fastening with an external device is inserted.

16. The transmission coil module according to claim 1 , wherein a plurality of functional holes formed in the shield are provided such that a thermistor located below the transmission coil module can detect temperature information of each of the top coil, the first bottom coil and the second bottom coil.

17. The transmission coil module according to claim 1 , wherein the coil frame includes a support plate, which forms the first receptacle and the second receptacle and supports the top coil, the first bottom coil and the second bottom coil,
wherein the coil frame includes a first central fixing plate having a shape corresponding to an inner shape of the top coil, a second central fixing plate having a shape corresponding to an inner shape of the first bottom coil, and a third central fixing plate having a shape corresponding to an inner shape of the second bottom coil, and
wherein an upper surface of the first central fixing plate is located at the same height as an upper surface of the support plate.

18. The transmission coil module according to claim 17 , wherein the first central fixing plate has the same thickness as the top coil.

Assignees

• Lg Innotek Co Ltd

Inventors

• Leem Sung Hyun

Classifications

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title

• H02J50/10 Primary

  using inductive coupling · CPC title

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title

• H01F38/14 Primary

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title