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
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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Abstract
Provided is a wireless power transmission system. The wireless power transmission system includes a power supply unit generating amplified power; a wireless power transmission unit receiving and converting the amplified power into wireless power; a wireless power reception unit receiving and converting the wireless power into charging power; and a charging unit receiving the charging power, wherein the charging unit includes a battery to store the charging power and the power supply unit includes a power detection unit identifies the charged state of the battery based on the amplified voltage and amplified current of the amplified power.
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10 Claims
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1. A method comprising:
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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; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification