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INDUCTIVE MODULE

  • US 20180233951A1
  • Filed: 09/11/2017
  • Published: 08/16/2018
  • Est. Priority Date: 02/15/2017
  • Status: Active Grant
First Claim
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1. A wireless power receiving module to receive magnetic flux for wireless power transfer, the module comprising:

  • a receiver coil comprising a single length of wire wound into a plurality of turns, the receiver coil configured to receive magnetic flux generated by a transmitter coil in a wireless charging device during a charging event and generate a plurality of electric fields;

    an electromagnetic receiver shield that is a passive component and coupled to a first side of the receiver coil, the electromagnetic receiver shield being configured to intercept some of the plurality of electric fields directed away from the receiver coil and allow the magnetic flux to pass through the first electromagnetic receiver shield toward the receiver coil;

    a ferrite layer coupled to a second side of the receiver coil opposite of the first side, the ferrite layer positioned to redirect magnetic flux during the charging event to improve charging efficiency; and

    a thermal mitigation shield comprising a thermally conductive layer adhered to an electrically conductive layer where the electrically conductive layer is coupled to ground, enabling the electrically conductive layer to capture stray flux during the charging event, wherein the ferrite layer is sandwiched between the thermal mitigation shield and the receiver coil.

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