Wireless power transmission device, wireless power reception device, and wireless charging system

Patent metadata

Field	Value
Publication number	US-2020051737-A1
Application number	US-201616340644-A
Country	US
Kind code	A1
Filing date	Dec 22, 2016
Priority date	Oct 10, 2016
Publication date	Feb 13, 2020
Grant date	—

Abstract

The present invention relates to a wireless power transmission device formed so as to wirelessly transmit power to a wireless power reception device, wherein the wireless power transmission device comprises: a first coil formed so as to transform a current into a magnetic field; and a first metal member formed so as to cover at least a portion of the first coil, and, in the present invention, the first metal member changes an emission direction of a magnetic field formed in the first coil so as to allow the power to reach the wireless power reception device which is positioned on a side surface of the wireless power transmission device.

First claim

1 - 10 . (canceled)

11 . A wireless power transmission device comprising:
a first coil configured to convert current into a magnetic field that is emitted in a first direction; and a first metal member formed to cover at least a portion of the first coil, wherein the first metal member is positioned to cause a change in direction of the magnetic field from the first direction to a second direction to provide power to a wireless power receiving device located adjacent to a side of the wireless power transmission device.

12 . The transmission device of claim 11 , wherein the first direction of the magnetic field is perpendicular to one side of the first coil and the second direction is parallel to the one side.

13 . The transmission device of claim 11 , wherein the first metal member is formed to cover at least half of one side of the first coil.

14 . The transmission device of claim 11 , wherein the first direction is perpendicular to the second direction.

15 . The transmission device of claim 11 , further comprising:
a second metal member shaped to define a space within which the first coil and the first metal member are located, wherein the second metal member comprises metal that prevents emission of the magnetic field.

16 . The transmission device of claim 15 , wherein the second metal member is shaped to define an opening such that at least part of a surface of the first coil, facing one surface of the first coil covered by the first metal member, is exposed through the opening.

17 . The transmission device of claim 16 , further comprising a second coil positioned to overlap a portion of the first coil that is exposed through the opening.

18 . The transmission device of claim 17 , wherein the second coil is positioned to be exposed through the opening.

19 . The transmission device of claim 17 , wherein the second coil is electrically connected to a capacitor to match a harmonic frequency of a fundamental frequency.

20 . The transmission device of claim 17 , wherein the second coil has one side electrically connected to the second metal member and another side connected to the second metal member to match a harmonic frequency of a fundamental frequency.

21 . A wireless power transmission device comprising:
a housing having a first side and a second side adjacent to the first side; a first coil located within the housing and configured to convert current into a magnetic field that is emitted in a first direction, wherein the first direction is perpendicular to a plane of the first side; a first metal member located within the housing and formed to cover at least a portion of the first coil, wherein the first metal member is positioned to cause a change in direction of the magnetic field from the first direction to a second direction to provide power to a wireless power receiving device located adjacent to the second side of the wireless power transmission device, and wherein the second direction is perpendicular to a plane of the second side.

22 . A wireless power transmission device comprising:
a housing; a first coil located within the housing and configured to convert current into a magnetic field that is emitted in a first direction; a first metal member located within the housing and formed to cover at least a portion of the first coil, wherein the first metal member is positioned to cause a change in direction of the magnetic field from the first direction to a second direction to provide power to a wireless power receiving device located adjacent to a side of the housing of the wireless power transmission device, and wherein the first direction is perpendicular to the second direction.

Assignees

• Lg Electronics Inc

Inventors

• Han Kiwon
• Seo Donghyun
• Park Jun
• Hwang Wonji

Classifications

• H02J50/10

  using inductive coupling · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/70

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

• H02J50/12 Primary

  of the resonant type · CPC title

• H01F38/14 Primary

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