System and method for inductive charging of portable devices

  • US 8,629,654 B2
  • Filed: 04/09/2012
  • Issued: 01/14/2014
  • Est. Priority Date: 01/31/2006
  • Status: Active Grant
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First Claim
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1. A system for inductive powering and charging of portable devices or batteries, comprising:

  • a base unit, including one or more primary coils which are capable of generating an inductive field for use in powering or charging one or multiple portable devices or batteries simultaneously, wherein each primary coil is positioned within the base unit so that an electrical current can be passed through the primary coil to generate an inductive field;

    a receiver unit, including a receiver coil which is coupled to or incorporated into a portable device or battery, or a skin, case, or battery door associated therewith, wherein the receiver coil receives energy inductively from the one or more primary coils and uses it to charge or power the portable device or battery; and

    components within the base unit for allowing a degree of position independence of the portable device, battery, skin, case, or battery door with respect to the base unit, including selectively activating an appropriate number of the one or more primary coils, includingverifying a presence of the receiver unit placed close to the base unit,activating the appropriate number of primary coils to be used with the receiver unit and its portable device, battery, skin, case, or battery door, andcommunicating information for use in managing power transfer to the portable device or battery.

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