Wireless power transferring method and device therefor
A wireless power transfer method may include a selection phase of monitoring the placement and removal of an object for an interface surface of the power transmitter, a ping phase of receiving a response from a power receiver by performing digital ping using a first communication protocol, an identification/configuration phase of receiving a configuration packet including configuration information of the power receiver using the first communication protocol, wherein the configuration packet includes power class information of the power receiver and communication protocol information of the power receiver, a negotiation phase of selecting any one of the first communication protocol and a second communication protocol different from the first communication protocol based on the power class information and/or the communication protocol information using the first communication protocol, a calibration phase of improving the ability to detect a foreign object by controlling a specific parameter, and a power transfer phase of performing communication with the power receiver using the selected communication protocol and transferring power to the power receiver.
1. A method for transferring, by a power transmitter, wireless power, the method comprising:
a ping phase of receiving a response from a power receiver by performing digital ping using a first communication protocol; and
a configuration phase of receiving a configuration packet of the power receiver using the first communication protocol, wherein the configuration packet includes communication protocol information of the power receiver indicating a second communication protocol supported by the power receiver;
wherein the power receiver supports the second communication protocol, based on that a value of the communication protocol information is ‘1’, and
wherein the power receiver does not support the second communication protocol, based on that the value of the communication protocol information is ‘0’.
2. The method of claim 1 , wherein the first communication protocol corresponds to an inband (IB) communication protocol defined in a wireless power transmission and reception system, and
wherein the second communication protocol corresponds to an out-of-band (OOB) communication protocol.
3. The method of claim 2 , wherein the OOB communication protocol is defined in a different communication system other than the wireless power transmission and reception system.
4. The method of claim 3 , wherein the IB communication protocol corresponds to a communication protocol based on a load modulation and frequency shift keying (FSK) method, and
wherein the OOB communication protocol corresponds to a short range communication protocol.
5. The method of claim 4 , further comprising:
a negotiation phase of selecting any one of the first communication protocol and the second communication protocol, wherein the second communication protocol is different from the first communication protocol,
when the second communication protocol is selected in the negotiation phase and the second communication protocol corresponds to Bluetooth, the negotiation phase further comprises receiving, from the power receiver, a Bluetooth medium access control (MAC) address of the power receiver used in the Bluetooth.
6. The method of claim 1 , further comprising:
a negotiation phase of selecting any one of the first communication protocol and the second communication protocol, wherein the second communication protocol is different from the first communication protocol, and
a power transfer phase of performing communication with the power receiver using the selected communication protocol and transferring power to the power receiver,
wherein the phase of selecting the first or the second communication protocol comprises:
selecting the second communication protocol, based on that the value of the communication protocol information is ‘1’, and
selecting the first communication protocol based on that the value of the communication protocol information is ‘0’.
7. A power transmitter, comprising:
a coil assembly including at least one primary coil generating a magnetic field;
a power conversion unit configured to convert electric energy into a power signal; and
a communication and control unit configured to control communication and power transfer with the power receiver,
wherein the power transmitter is configured to:
perform digital ping through a first communication protocol by controlling the communication and control unit and receive a response from the power receiver, and
receive a configuration packet of the power receiver through the first communication protocol by controlling the communication and control unit, wherein the configuration packet comprises communication protocol information of the power receiver indicating a second communication protocol supported by the power receiver,
wherein the power receiver supports the second communication protocol, based on that a value of the communication protocol information is ‘1’, and
wherein the power receiver does not support the second communication protocol, based on that the value of the communication protocol information is ‘0’.