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BATTERY CHARGING PAD EMPLOYING MAGNETIC INDUCTION

  • US 20100315038A1
  • Filed: 06/14/2010
  • Published: 12/16/2010
  • Est. Priority Date: 06/16/2009
  • Status: Active Grant
First Claim
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1. A battery charging pad that transmits power from a transmitting coil to a magnetically coupled receiving coil to charge a battery housed in a device housing a battery comprising:

  • a transmitting coil that is put in close proximity to the receiving coil in the device housing a battery and transmits electrical power to the receiving coil;

    a case that houses the transmitting coil and has a top plate where a device housing a battery is placed;

    a moving mechanism housed in the case to move the transmitting coil in close proximity to the receiving coil; and

    a position detection controller that detects the position of a device housing a battery placed on the top plate and controls the moving mechanism to move the transmitting coil in close proximity to the receiving coil in the device housing a battery, the position detection controller comprising;

    a plurality of position detection coils fixed to the inside surface of the top plate;

    a pulse generator that supplies pulse signals to the position detection coils;

    a receiving circuit that receives echo signals output from the receiving coil and transmitting coil to the position detection coils as a result of excitation by pulse signals supplied from the pulse generator to the position detection coils; and

    a discrimination circuit that determines the position of the receiving coil and the transmitting coil from the echo signals received by the receiving circuit,wherein the position detection controller detects the position of the receiving coil and transmitting coil and controls the moving mechanism to move the transmitting coil in close proximity to the receiving coil.

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