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POWER TRANSMISSION DEVICE AND POWER RECEPTION DEVICE

  • US 20160006260A1
  • Filed: 06/11/2015
  • Published: 01/07/2016
  • Est. Priority Date: 07/04/2014
  • Status: Active Grant
First Claim
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1. A power transmission device that transmits electric power to a power reception device, comprising:

  • a power transmission coil configured to transmit electric power to a power reception coil of said power reception device in a contactless manner; and

    a foreign object detector provided above said power transmission coil, with said power transmission coil being configured to transmit electric power to said power reception coil located above said power transmission coil,said foreign object detector includinga plurality of first coils arranged along an upper surface of said power transmission coil, anda plurality of second coils arranged along said upper surface of said power transmission coil above or below said plurality of first coils, said plurality of second coils being provided to correspond to said plurality of first coils,said plurality of second coils each being arranged to face a corresponding one of the first coils,an outer shape of each of said plurality of first coils and of each of said plurality of second coils being smaller than an outer shape of said power transmission coil when said power transmission coil, said plurality of first coils and said plurality of second coils are viewed two-dimensionally from above said power transmission coil.

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