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Multi-coil wireless charging method and device and system therefor

  • US 10,498,163 B2
  • Filed: 08/23/2016
  • Issued: 12/03/2019
  • Est. Priority Date: 11/06/2015
  • Status: Active Grant
First Claim
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1. A wireless power transmitter for wirelessly transmitting power to a wireless power receiver, the wireless power transmitter comprising:

  • a power transmission unit comprising at least two transmission coils;

    a controller configured to control a first detection signal for detecting presence of the wireless power receiver so as to be transmitted simultaneously using different frequencies pre-allocated to each of the transmission coils; and

    a modulation/demodulation unit configured to transmit, when a first signal strength indicator corresponding to the first detection signal is received from the wireless power receiver, the received first signal strength indicator and a predetermined transmission coil identifier for identifying a transmission coil through which the first signal strength indicator has been received to the controller,wherein the controller controls a second detection signal so as to be transmitted through the transmission coil through which the first signal strength indicator has been received.

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