Chargers and methods for wireless power transfer

  • US 9,356,659 B2
  • Filed: 03/14/2013
  • Issued: 05/31/2016
  • Est. Priority Date: 01/18/2011
  • Status: Active Grant
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First Claim
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1. A wireless power charger, comprising:

  • a base unit having one or more transmitter coils; and

    one or more components including a magnetic material or layer, that modify the magnitude and/or phase of an electromagnetic field and/or corresponding magnetic flux in one or multiple dimensions and/or to guide the magnetic flux in such a manner as to create a preferential path for flux flow, the preferential path having a geometry that provides for low flux leakage and that exhibits low reluctance for return magnetic flux,wherein, when one or more vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries, each having one or more receiver coils or receivers associated therewith, is placed in proximity to the base unit, one or more of the transmitter coils are used to inductively generate a current in the receiver coil or receiver associated with the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries to charge or power the vehicles, mobile devices, cases, skins, battery doors, dongles, or batteries.

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