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Wireless power transfer through a metal object

  • US 10,381,875 B2
  • Filed: 02/06/2015
  • Issued: 08/13/2019
  • Est. Priority Date: 07/07/2014
  • Status: Active Grant
First Claim
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1. An apparatus for wirelessly receiving power via a magnetic field, the apparatus comprising:

  • a metal cover that forms at least a portion of a housing, the metal cover comprising a first metal portion and a second metal portion that is electrically isolated from the first metal portion by at least one slot that is disposed between the first metal portion and the second metal portion and surrounds an entire perimeter of the second metal portion, the first metal portion forming a loop around a perimeter of the cover and entirely surrounding the second metal portion and the first metal portion configured to inductively couple power via the magnetic field, the magnetic field inducing a current in the first metal portion; and

    a receive circuit electrically coupled to the first metal portion, housed within the housing, and configured to receive the current from the first metal portion and charge or power a load based on the current.

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