Power transmission unit and power transmission coil

Patent metadata

Field	Value
Publication number	US-2018366263-A1
Application number	US-201815984987-A
Country	US
Kind code	A1
Filing date	May 21, 2018
Priority date	Jun 14, 2017
Publication date	Dec 20, 2018
Grant date	—

Abstract

A power transmission unit includes: a power transmission coil; a communication coupler that is formed in an annular shape about an axis X and arranged to surround the power transmission coil; and a shielding member that is formed in an annular shape about the axis X, and arranged between the power transmission coil and the communication coupler in an intersecting direction. The shielding member is arranged at a position along the intersecting direction to surround the power transmission coil, and shields magnetic force generated by the power transmission coil.

First claim

What is claimed is:

1 . A power transmission unit comprising:
a power transmission coil that transmits electric power in a non-contact manner; a communication part that is formed in an annular shape about an axis, arranged to surround the power transmission coil, and transmits and receives a signal; and a shielding member that is formed in an annular shape about the axis, arranged between the power transmission coil and the communication part in an intersecting direction intersecting with the axis, and shields magnetic force generated by the power transmission coil.

2 . The power transmission unit according to claim 1 , further comprising:
a magnetic member that is arranged on the power transmission coil and includes a magnetic material; a substrate that includes a circuit and is electrically connected to the power transmission coil; an inner member that defines a relative position of the substrate, the power transmission coil, the magnetic member, the shielding member, and the communication part so as to allow transmission of electric power with a counterpart power transmission coil and allow communication with a counterpart communication part, the inner member to which the substrate, the power transmission coil, the magnetic member, the shielding member, and the communication part are assembled; and an outer member that covers the inner member to which the substrate, the power transmission coil, the magnetic member, the shielding member, and the communication part are assembled.

3 . The power transmission unit according to claim 2 , wherein
the inner member includes: a supporting plate arranged to intersect with the axis; an erected wall part that is erected from the supporting plate to be arranged in an annular shape about the axis, and includes the communication part wound around an outer face of the erected wall part to be mounted on the outer face and the shielding member mounted on an inner face; and a housing chamber that is arranged inside the erected wall part, includes a space part, and houses the power transmission coil and the magnetic member in the space part.

4 . The power transmission unit according to claim 1 , wherein
the shielding member includes a shield wall part that is arranged at a position along the intersecting direction to surround the power transmission coil so as to shield magnetic force generated by the power transmission coil, and the shield wall part is formed such that a gap between wall surfaces opposed to each other in the intersecting direction is widened from one side toward the other side of an axial direction along the axis.

5 . The power transmission unit according to claim 2 , wherein
the shielding member includes a shield wall part that is arranged at a position along the intersecting direction to surround the power transmission coil so as to shield magnetic force generated by the power transmission coil, and the shield wall part is formed such that a gap between wall surfaces opposed to each other in the intersecting direction is widened from one side toward the other side of an axial direction along the axis.

6 . The power transmission unit according to claim 3 , wherein
the shielding member includes a shield wall part that is arranged at a position along the intersecting direction to surround the power transmission coil so as to shield magnetic force generated by the power transmission coil, and the shield wall part is formed such that a gap between wall surfaces opposed to each other in the intersecting direction is widened from one side toward the other side of an axial direction along the axis.

7 . The power transmission unit according to claim 1 , wherein
the power transmission coil includes: a coil winding part in which a conductor wire is arranged in a spiral shape about the axis; a winding start end part as an end of the conductor wire on a winding start side; and a winding finish end part as an end of the conductor wire on a winding finish side, wherein a thickness of the coil winding part in the axial direction along the axis is smaller than an outer diameter of the winding start end part and an outer diameter of the winding finish end part.

8 . The power transmission unit according to claim 2 , wherein
the power transmission coil includes: a coil winding part in which a conductor wire is arranged in a spiral shape about the axis; a winding start end part as an end of the conductor wire on a winding start side; and a winding finish end part as an end of the conductor wire on a winding finish side, wherein a thickness of the coil winding part in the axial direction along the axis is smaller than an outer diameter of the winding start end part and an outer diameter of the winding finish end part.

9 . The power transmission unit according to claim 3 , wherein
the power transmission coil includes: a coil winding part in which a conductor wire is arranged in a spiral shape about the axis; a winding start end part as an end of the conductor wire on a winding start side; and a winding finish end part as an end of the conductor wire on a winding finish side, wherein a thickness of the coil winding part in the axial direction along the axis is smaller than an outer diameter of the winding start end part and an outer diameter of the winding finish end part.

10 . The power transmission unit according to claim 4 , wherein
the power transmission coil includes: a coil winding part in which a conductor wire is arranged in a spiral shape about the axis; a winding start end part as an end of the conductor wire on a winding start side; and a winding finish end part as an end of the conductor wire on a winding finish side, wherein a thickness of the coil winding part in the axial direction along the axis is smaller than an outer diameter of the winding start end part and an outer diameter of the winding finish end part.

11 . The power transmission unit according to claim 7 , wherein
the conductor wire is a litz wire obtained by intertwisting a plurality of conductor elemental wires.

12 . The power transmission unit according to claim 7 , wherein
the winding start end part and the winding finish end part are positioned outside or inside the coil winding part when viewed from the axial direction.

13 . The power transmission unit according to claim 11 , wherein
the winding start end part and the winding finish end part are positioned outside or inside the coil winding part when viewed from the axial direction.

14 . The power transmission unit according to claim 7 , wherein
the conductor wire of the coil winding part is coated with an adhesive member.

15 . The power transmission unit according to claim 11 , wherein
the conductor wire of the coil winding part is coated with an adhesive member.

16 . The power transmission unit according to claim 12 , wherein
the conductor wire of the coil winding part is coated with an adhesive member.

17 . A power transmission unit comprising:
a power transmission coil that transmits electric power in a non-contact manner; a substrate that includes a circuit and is electrically connected to the power transmission coil; a magnetic member that is arranged on the power transmission coil and includes a magnetic material; an inner member that defines a relative position of the substrate, the power transmission coil, and the magnetic member so as to allow transmission of electric power with a counterpart power transmission coil, the inner member to which the substrate, the power transmission coil, and the mag

Assignees

• Yazaki Corp

Inventors

• Nishizaki Ryohei
• Shiroki Takashi
• Nakahara Takahiro
• Ueda Takayuki

Classifications

• H02J50/005

  Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices · CPC title

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H01F38/14

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

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H02J50/12

  of the resonant type · CPC title