Sport ball inductive charging methods and systems

  • US 10,523,053 B2
  • Filed: 05/23/2014
  • Issued: 12/31/2019
  • Est. Priority Date: 05/23/2014
  • Status: Active Grant
First Claim
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1. A method for inductively charging a power supply of athletic equipment, comprising:

  • receiving a presence signal of a charging base;

    generating a calibration signal based on a frequency of a local oscillator of the athletic equipment;

    transmitting the calibration signal to the charging base in response to the receiving of the presence signal, the calibration signal being transmitted via a resonance coil of the athletic equipment;

    receiving initial power from the charging base at a resonant circuit via the resonance coil;

    transmitting charging information to the charging base, wherein the charging information indicates a charging voltage value of the initial power received from the charging base at the resonant circuit and a charging state, the transmitting of the charging information including;

    detecting the charging voltage value and the charging state, the charging state being one of either a normal charging state or a trickle charging state;

    selecting a transmission frequency range that corresponds to the detected charging state from among a first transmission frequency range and a second transmission frequency range, the first transmission frequency range identifying the trickle charging state and the second transmission frequency range identifying the normal charging state;

    encoding the charging voltage value within the selected transmission frequency range; and

    transmitting the charging information at the selected transmission frequency range; and

    transmitting, from the charging base, adjusted power to the resonant circuit after transmitting the charging information.

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