Method of manufacturing magnetic shielding block for wireless power charging, and magnetic shielding block and wireless power receiving device using same

Patent metadata

Field	Value
Publication number	US-2018366262-A1
Application number	US-201616063554-A
Country	US
Kind code	A1
Filing date	Nov 2, 2016
Priority date	Dec 28, 2015
Publication date	Dec 20, 2018
Grant date	—

Abstract

The present invention relates to a magnetic shielding block for a wireless power receiver, and a method of manufacturing same. A method of manufacturing a magnetic shielding block according to an embodiment of the present invention may comprise the steps of: disposing a non-conductive magnetic shielding sheet between a first and second cover tape and laminating same; marking a cutting region on one side of the laminated cover tape; and cutting the marked cutting region.

First claim

1 - 20 . (canceled)

21 . A magnetic shielding block, comprising:
first and second cover tapes; and a nonconductive magnetic shielding sheet disposed between the first cover tape and the second cover tape, wherein the nonconductive magnetic shielding sheet is bonded with the first cover tape and the second cover tape, and wherein the magnetic shielding block is formed by cutting off cutting areas marked on one surface of the bonded cover tapes.

22 . The magnetic shielding block according to claim 21 , wherein the nonconductive magnetic shielding sheet is formed of a ferrite-based material.

23 . The magnetic shielding block according to claim 22 , wherein the ferrite-based material is any one of a Ni—Zn—Cu-based material, a Ni—Zn-based material and a Mn—Zn-based material.

24 . The magnetic shielding block according to claim 21 , wherein the cutting area is circular and a diameter of the cutting area is 30 mm less than or equal to 30 mm.

25 . The magnetic shielding block according to claim 21 , wherein a magnetic permeability of the nonconductive magnetic shielding sheet has a real part less than or equal to 300 and an imaginary part less than or equal to 20 in a low frequency band below 300 KHz.

26 . A magnetic shielding block, comprising:
first to n-th conductive magnetic shielding sheets, n>=2; n-1 intermediate adhesive members disposed between two adjacent the conductive magnetic shielding sheets to produce a bonded block; and a first insulating cover tape and a second insulating cover tape to be adhered to upper and lower surfaces of the bonded block, respectively, wherein a portion of the bonded block is cut off, and wherein the first insulating cover tape is adhered to the upper surface of the cutoff bonded block and the second insulating cover tape is adhered to the lower surface of the cutoff bonded block.

27 . The magnetic shielding block according to claim 26 , wherein cut surface of the cutoff bonded block is fully covered with the first insulating cover tape and the second insulating cover tape.

28 . The magnetic shielding block according to claim 27 , wherein the bonded block is cut into a circle, and
wherein the adhered first insulating cover tape and the second insulating cover tape are cut into a diameter corresponding to area of the cut surface.

29 . The magnetic shielding block according to claim 26 , wherein the conductive magnetic shielding sheets are formed of any one of a nano-crystal-based material and an amorphous-based material.

30 . The magnetic shielding block according to claim 26 , wherein the conductive magnetic shielding sheets have a thickness of 17 micrometers (μm) to 25 μm.

31 . The magnetic shielding block according to claim 26 , wherein the magnetic shielding block is used in a wireless power receiver and has a diameter of 30 mm or less.

32 . A wireless power reception device comprising:
a reception coil configured to wirelessly receive alternating current (AC) power; a control circuit board connected to both terminals of the reception coil; a magnetic shielding member mounted between the reception coil and the control circuit board to block the received AC power from being transferred to the control circuit board; and an adhesive member configured to adhere the magnetic shielding member and the reception coil to each other.

33 . The wireless power reception device according to claim 32 , wherein the reception coil is any one of a patterned coil and a wire-wound coil.

34 . The wireless power reception device according to claim 33 , wherein the patterned coil is mounted as the reception coil when a diameter of the reception coil exceeds 25 mm, and the wire-wound coil is mounted as the reception coil when the diameter of the reception coil is greater than or equal 25 mm.

35 . The wireless power reception device according to claim 31 , wherein the magnetic shielding member is a conductive magnetic shielding member formed of any one of a nano-crystal-based material and an amorphous-based material.

36 . The wireless power reception device according to claim 32 , wherein the magnetic shielding member is a nonconductive magnetic shielding member formed of any one of a Ni—Zn-Cu-based material, a Ni—Zn-based material, and a Mn—Zn-based material.

37 . The wireless power reception device according to claim 36 , wherein a magnetic permeability of the nonconductive magnetic shielding member has a real part less than or equal to 300 and an imaginary part less than or equal to 20 in a low frequency band below 300 KHz.

38 . The wireless power reception device according to claim 32 , wherein the magnetic shielding member comprises:
first to n-th conductive magnetic shielding sheets; and n-1 intermediate adhesive members configured to adhering the first to n-th conductive magnetic shielding sheets to each other, wherein the first to the n-th conductive magnetic shielding sheets adhered to each other are cut to a size of the reception coil and then subjected to surface insulation treatment.

39 . The wireless power reception device according to claim 38 , wherein the surface insulation treatment is performed using at least one of an insulating cover tape or an insulating coating agent.

40 . The wireless power reception device according to claim 39 , wherein the surface insulation treatment is performed by applying the insulating coating agent to the cut surface.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Dong Hyuk
• Kim Hyoung Rae
• Song Ji Yeon
• Lee Hye Min

Classifications

• H01F10/13

  Amorphous metallic alloys, e.g. glassy metals {(H01F10/3204 takes precedence)} · CPC title

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F10/20

  Ferrites · CPC title

• H02J50/12

  of the resonant type · CPC title

• H05K9/0075

  Magnetic shielding materials · CPC title