System and method for charging or powering devices, such as robots, electric vehicles, or other mobile devices or equipment

  • US 9,722,447 B2
  • Filed: 03/14/2013
  • Issued: 08/01/2017
  • Est. Priority Date: 03/21/2012
  • Status: Active Grant
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First Claim
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1. A system for enabling efficient wireless power transfer and charging of one or more devices or batteries, comprising:

  • a charger coil and a receiver coil that, via an alternating current magnetic field that enables wireless power transfer from the charger coil to the receiver coil, wherein the receiver coil is electrically connected to the one or more devices or batteries for a vehicle like an automobile, train, bus, truck, electric bicycle, or other personal mobility or moving equipment like a Segway or robot;

    one or more magnetic guiding layers sized for improved alignment and energy transfer efficiency that extend beyond one or more of the charger coil or receiver coil dimensions, and allow returning flux lines of the magnetic field to close on themselves, the magnetic field lines being substantially perpendicular to the one or more magnetic guiding layers, and provide a low reluctance path for the magnetic field and improved power transfer and charging efficiency; and

    a means for detecting and aligning the charger and receiver coils using RFID, NFC, Bluetooth or other electromagnetic or optical alignment or magnetic coupling or magnetic pinging means to optimize energy or power transfer efficiency.

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