Power transfer apparatus, power transmission apparatus, power reception apparatus, and power transfer system

Abstract

Provided is a power transfer apparatus capable of effectively cooling heat generated by wireless power transfer.The power transfer apparatus is provided with: a power transmission coil TC for performing wireless power transfer; and a heat-dissipating plate CBT for cooling the power transmission coil TC, the heat-dissipating plate CBT comprising heat-dissipating members CB0 or the like which are divided by gaps GP along the radial direction of a winding plane of a copper thin-film wire constituting the power transmission coil TC.

1 . A power transfer apparatus, comprising:
 a transfer configured to perform a non-contact type power transfer, the transfer including a coil in which a winding wire is wound a plurality of times;   a metallic heat release configured to cool the transfer, the metallic heat release facing a region of the coil excluding a region inside from an innermost perimeter of the winding wire and facing a region outside from an outermost perimeter of the winding wire, in a plane parallel to a winding surface of the winding wire, and includes heat release members divided by one or a plurality of gaps along a radial direction of the winding surface; and   a second heat release that is thermally connected to, and electrically insulated from, any one of the heat release members, on an outer edge of the metallic heat release, the second heat release being a metal part of an object which is equipped with the power transfer apparatus and receives the power transmission.   
     
     
         2 . The power transfer apparatus according to  claim 1 , further comprising:
 a thermally conductive resin layer between the transfer and the metallic heat release.   
     
     
         3 . The power transfer apparatus according to  claim 1 , further comprising:
 a shield that is disposed on a side opposite to a power transmission side of the transfer at a time of power transmission or a side opposite to a power reception side of the transfer at a time of power reception when seen from a position of the transfer and the metallic heat release, and is configured to shield an electromagnetic wave generated by the power transfer; and   a magnetic body that is disposed between the transfer and the metallic heat release, and the shield,   wherein an area of the shield and the magnetic body in a plane perpendicular to a straight line toward the shield and the magnetic body from the position of the transfer is greater than or equal to an area of the transfer in the plane.   
     
     
         4 . The power transfer apparatus according to  claim 3 ,
 wherein the straight line is a perpendicular line that is erected in a direction toward the shield and the magnetic body with a center of the coil as a foot, and   an area of a surface perpendicular to the perpendicular line of the shield and the magnetic body that are respectively in the shape of a plate is greater than or equal to an area of the winding surface of the winding wire in the coil.   
     
     
         5 . The power transfer apparatus according to  claim 4 , wherein the transfer includes
 a first coil that performs the power transmission or the power reception, as the power transfer, and   a second coil stacked on the first coil in which power to be subjected to the power transmission is supplied at the time of the power transmission, and power to be subjected to the power reception is output at the time of the power reception.   
     
     
         6 . The power transfer apparatus according to  claim 5 ,
 wherein the first coil includes
 an out-in winding wire that is wound toward an inner circumference side from an outer circumference side of the first coil, and 
 an in-out winding wire that is wound in a winding direction opposite to the out-in winding wire toward the outer circumference side from the inner circumference side of the first coil, and 
   in the first coil, the out-in winding wire and the in-out winding wire are stacked such that a winding position of the out-in winding wire is coincident with a winding position of the in-out winding wire.   
     
     
         7 . The power transfer apparatus according to  claim 5 , wherein in the second coil, a second winding wire is wound a plurality of times. 
     
     
         8 . (canceled) 
     
     
         9 . A power transmission apparatus provided in a power transfer system that includes the power transmission apparatus and a power reception apparatus separated from the power transmission apparatus, and transfers power to the power reception apparatus from the power transmission apparatus in a non-contact manner, the power transmission apparatus comprising:
 the power transfer apparatus according to  claim 1 ; and   an output that outputs power to be transferred to the transfer of the power transfer apparatus.   
     
     
         10 . A power reception apparatus provided in a power transfer system that includes a power transmission apparatus and the power reception apparatus separated from the power transmission apparatus, and transfers power to the power reception apparatus from the power transmission apparatus in a non-contact manner, the power reception apparatus comprising:
 the power transfer apparatus according to  claim 1 ; and   an input that is connected to the transfer of the power transfer apparatus.   
     
     
         11 . A non-contact type power transfer system, comprising:
 the power transmission apparatus according to  claim 9 ; and   a power reception apparatus that is separated from the power transmission apparatus, is disposed to face the transfer, and configured to receive power transmitted from the power transmission apparatus.   
     
     
         12 . A non-contact type power transfer system, comprising:
 a power transmission apparatus; and   the power reception apparatus according to  claim 10  that is separated from the power transmission apparatus and configured to receive power transmitted from the power transmission apparatus in which the transfer is disposed to face the power transmission apparatus.