Inductive charging with support for multiple charging protocols

  • US 8,896,264 B2
  • Filed: 12/07/2012
  • Issued: 11/25/2014
  • Est. Priority Date: 06/11/2010
  • Status: Active Grant
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First Claim
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1. A system for inductive charging with support for multiple charging protocols, comprising:

  • a base unit having one or more charger coils, for use in inductive charging;

    one or more components within one or both of the base unit or a mobile device for supporting different charging protocols, for use by the base unit to control charging of the mobile device; and

    wherein, when a mobile device having one or more receiver coils and receivers associated with, is placed in proximity to the base unit, the system determines and selects a particular charging protocol from within a plurality of different charging protocols, wherein different charger types and different mobile device types can be associated with different charging protocols, for use with the one or more charger coils, including thatthe base unit periodically activates the one or more charger coils;

    the mobile devicedetects the activation of the one or more charger coils and uses such information to determine a charger type, andperforms an initiation process whereby one or more of a mobile device presence, receiver identifier, power or voltage requirement, temperature, or state of charge is communicated to the base unit; and

    the base unit and the mobile device exchange information to select from within the different charging protocols, the particular charging protocol to be used to inductively generate a current in the receiver coil or receiver associated with the mobile device, to charge or power the mobile device, including communicating between the charger and the receiver, using the particular charging protocol, information used by the base unit to make appropriate adjustments to its charger coil drive circuitry to achieve a desired voltage, current or power at the receiver output.

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