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Coil unit, non-contact power transmission device, non-contact power reception device, non-contact power supply system, and vehicle

  • US 8,508,184 B2
  • Filed: 04/21/2011
  • Issued: 08/13/2013
  • Est. Priority Date: 04/27/2010
  • Status: Expired due to Fees
First Claim
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1. A coil unit that is provided in a vehicle or in a power supply device for a vehicle, and that performs at least one of transmission and reception of electric power using electromagnetic resonance between the coil unit and a primary resonance coil disposed to face the coil unit, the coil unit comprisinga secondary resonance coil that electromagnetically resonates with the primary resonance coil, wherein:

  • the secondary resonance coil includes a first coil and a second coil;

    the first coil and the second coil have a same number of turns, a same coil diameter, and a same shape, the first coil and the second coil are electrically connected in series, and the first coil and the second coil are disposed in a manner such that directions of generated magnetic fields are opposite to each other; and

    the first coil is disposed adjacent to the second coil on a plane perpendicular to the directions of the generated magnetic fields.

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