Systems and methods for providing positioning freedom, and support of different voltages, protocols, and power levels in a wireless power system

  • US 9,178,369 B2
  • Filed: 01/17/2012
  • Issued: 11/03/2015
  • Est. Priority Date: 01/18/2011
  • Status: Active Grant
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First Claim
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1. A system for use in charging or powering one or more devices or batteries by wireless power, comprising:

  • one or more ofa receiver coil, associated with a receiver for use with a device or battery, which receives inductive power from a charger coil placed close to the receiver coil and configured to provide power thereto, anda charger coil, provided within a charger, which transmits inductive power to a receiver coil placed close to the charger coil and configured to receive power therefrom;

    a switching layer having magnetic properties and covering the one or more receiver coil or charger coil, so that, during charging or powering of a device or battery, the switching layer is layered eitherbetween the receiver coil and a surface of the receiver, orbetween the charger coil and a surface of the charger; and

    wherein one or more components are used to modify one or both the magnitude or phase of an electromagnetic field, provided by the charger coil, in one or multiple dimensions, including wherein, when the receiver coil is placed close to the charger coil, the switching layer'"'"'s magnetic properties are locally modified, by one or more of a magnetic field of the receiver coil or charger coil, or by another magnetic component, to control magnetic flux within a particular region of the switching layer, includingguiding the magnetic flux to provide localized power transfer from the charger coil to the receiver coil within the particular region of the switching layer that is generally aligned both with the receiver coil and the charger coil, whileproviding electromagnetic shielding in regions of the switching layer other than the particular region.

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