Wireless energy transfer for rechargeable batteries

  • US 10,158,251 B2
  • Filed: 04/01/2016
  • Issued: 12/18/2018
  • Est. Priority Date: 06/27/2012
  • Status: Active Grant
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First Claim
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1. A device capable of being charged wirelessly, the device comprising:

  • a cylindrical enclosure, symmetrical around an axis, comprising a first end having a positive terminal and a second end having a negative terminal and having a form factor corresponding to a battery; and

    a magnetic resonator disposed within the cylindrical enclosure, the magnetic resonator comprising a plurality of loops of a conductive material oriented coaxially with the axis of the cylindrical enclosure, the plurality of loops coupled to at least one capacitor and coupled to the positive terminal and the negative terminal,wherein the magnetic resonator is configured to receive energy wirelessly through an oscillating magnetic field generated by a source magnetic resonator with a source resonant frequency;

    wherein the magnetic resonator has an unperturbed resonant frequency that is different than the source resonant frequency; and

    wherein the device is a first device, and is configured so that when a second device enclosed within a second enclosure and comprising a second magnetic resonator is positioned proximate to the cylindrical enclosure such that the first device and the second device are not directly electrically connected, the magnetic resonator has a perturbed resonant frequency that matches the source resonant frequency.

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