Method for wireless charging and device supporting same

A method of operating a power transmitting unit (PTU) configured to support resonance wireless charging and induction wireless charging, the method comprising:

• transmitting a first signal for detecting at least one external electronic device through at least one of a first coil for the induction wireless charging and a second coil for the resonance wireless charging;
• receiving, through the second coil, a feedback of the transmitted first signal from a first external electronic device among the at least one external electronic device;
• in response to receiving the feedback, controlling a wireless charging circuit and transmitting a first power for charging the first external electronic device in a resonance scheme;
• identifying whether a first region corresponding to the first coil and being at least partially flat is available;
• based on the first region being available, determining whether to change a charging scheme of the first external electronic device from the resonance scheme to an induction scheme;
• and
• in response to determining to change the charging scheme of the first external electronic device into the induction scheme, transmitting a control signal for charging using the induction scheme to the first external electronic device through a short-range wireless communication circuit.

A power transmitting unit (PTU) configured to support resonance wireless charging and induction wireless charging, comprising:

• at least one wireless charging coil;
• a wireless charging circuit electrically connected to the at least one wireless charging coil;
• a short-range wireless communication circuit;
• and
• at least one processor operatively connected to the wireless communication circuit and the short-range wireless communication circuit,
• wherein the at least one processor is configured to:
• transmit a first signal for detecting at least one power receiving unit through the at least one wireless charging coil;
• receive a feedback of the transmitted first signal from the at least one power receiving unit through the at least one wireless charging coil;
• in response to receiving the feedback, identify a first power receiving unit that supports the resonance wireless charging and does not support the induction wireless charging among the at least one power receiving unit;
• control the wireless charging circuit and transmit a first power for charging the identified first power receiving unit in a resonance scheme;
• obtain information on a battery state of charge of the first power receiving unit from the first power receiving unit through the short-range wireless communication circuit;
• determine whether a charging level of the first power receiving unit is less than or equal to a threshold value, based on the obtained information on the state of charge;
• and
• in response to determining that the charging level of the first power receiving unit is less than or equal to the threshold value, transmit a signal instructing a movement of the first power receiving unit through the short-range wireless communication circuit.

A power receiving unit (PRU) configured to support resonance wireless charging and/or induction wireless charging, comprising:

• a wireless charging circuit;
• a short-range wireless communication circuit;
• a display;
• and
• at least one processor operatively connected to the wireless charging circuit, the short-range wireless communication circuit, and the display,
• wherein the at least one processor is configured to:
• receive a first signal for detecting the power receiving unit from a power transmitting unit through the wireless charging circuit;
• transmit a feedback of the received first signal to the power transmitting unit through the wireless charging circuit;
• receive a first power for charging in a resonance scheme through the wireless charging circuit;
• in response to receiving the first power, perform wireless charging in the resonance scheme;
• while performing the wireless charging in the resonance scheme, transmit information on a battery state of charge of the power receiving unit to the power transmitting unit through the short-distance wireless communication circuit;
• receive a control signal for charging using an induction scheme from the power transmitting unit through the short-range wireless communication circuit;
• and
• in response to receiving the control signal, output a movement guide through the display.