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Wireless power transmission system calculating the battery charge state of the receiver based on the supply impedance of the power source and the summed impedance of the wireless transmitter, wireless receiver, medium therebetween, and battery charge circuit

  • US 10,008,888 B2
  • Filed: 07/18/2014
  • Issued: 06/26/2018
  • Est. Priority Date: 01/23/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • generating, by a power supply unit, amplified power when a battery is uncharged;

    identifying, by the power supply unit, whether the battery is charged or uncharged;

    receiving, by a wireless power transmission unit, the amplified power;

    converting, by the wireless power transmission unit, the amplified power into wireless power;

    wirelessly transmitting, by the wireless power transmission unit, the wireless power;

    receiving, by a wireless power reception unit, the wireless power;

    converting, by the wireless power reception unit, the wireless power into charging power; and

    receiving, by a charging unit, the charging power, the charging unit including the battery and a charging control unit; and

    charging, by the charging unit, the battery by the charging power,wherein identifying whether the battery is charged or uncharged includes;

    determining a supply impedance according to the following Equation 1;

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