Electronic device for supporting fast battery charging

1 . A power supply device comprising:

an authentication circuit;

power supply circuits; and

a control circuit configured to be connected to the authentication circuit and the power supply circuits,

wherein each of the power supply circuits comprises a coil and a communication circuit,

wherein each of the power supply circuits is configured to transmit a power signal to an external power reception device through the coil, and

wherein the control circuit is configured to:

while transmitting the power signal to a first power reception device and a second power reception device, send a first message for requesting authentication to the first power reception device and the second power reception device,

based on sending the first message, receive, through a first communication circuit, a first authentication request message for fast charging from the first power reception device and receive, through a second communication circuit, a second authentication request message from a second power reception device,

determine the first power reception device as a first target to be authenticated and the second power reception device as a second target to be authenticated,

based on the first authentication request message, authenticate the first power reception device by relaying an exchange of a data signal between the authentication circuit and the first power reception device,

based on completely authenticating the first power reception device, send through the second communication circuit, a second message for requesting authentication to the second power reception device while maintaining transmission of the power signal from a second power supply circuit to the second power reception device,

based on sending the second message, receive, through the second communication circuit, a third authentication request message from the second power reception device, and

based on the third authentication request message, authenticate the second power reception device by relaying an exchange of a data signal between the authentication circuit and the second power reception device.

2 . The power supply device of claim 1 , wherein the control circuit is included in a power supply circuit designated as primary among a plurality of the power supply circuits configured in the power supply device.

3 . The power supply device of claim 1 , wherein the control circuit is further configured to determine an authentication order according to a chronological order in which the first authentication request message and the second authentication request message are received from the first power reception device and the second power reception device respectively.

4 . The power supply device of claim 1 ,

wherein charging pads which correspond to the power supply circuits and on which the first and second power reception devices are respectively mounted on are provided, and

wherein the control circuit is configured to determine an authentication order according to an order designated for the charging pads.

5 . The power supply device of claim 1 , wherein the control circuit is further configured to determine an authentication order, based on identification information about the first power reception device and the second power reception device.

6 . The power supply device of claim 1 , wherein the control circuit includes a microcontroller unit (MCU).

7 . A power reception device comprising:

a battery;

a charging circuit configured to charge the battery;

a coil;

a power reception circuit configured to transmit a power signal received from a power supply device through the coil to the charging circuit;

a communication circuit configured to perform data communication with the power supply device through the coil; and

a control circuit configured to be connected to the charging circuit, the power reception circuit, and the communication circuit,

wherein the control circuit is configured to:

transmit a first authentication request message for requesting authentication for fast charging to the power supply device through the communication circuit, based on identifying that the power supply device supports fast charging from identification information about the power supply device received through the communication circuit,

receive a retransmission request message for requesting a re-request for authentication from the power supply device through the communication circuit after transmitting the first authentication request message, and

transmit a second authentication request message to the power supply device through the communication circuit in response to the retransmission request message.

8 . A power reception device comprising:

a battery;

a charging circuit configured to charge the battery;

a coil;

a power reception circuit configured to transmit a power signal received from a power supply device through the coil to the charging circuit;

a communication circuit configured to perform data communication with the power supply device through the coil; and

a control circuit configured to be connected to the charging circuit, the power reception circuit, and the communication circuit,

wherein the control circuit is configured to:

transmit a first authentication request message for requesting authentication for fast charging to the power supply device through the communication circuit, based on identifying that the power supply device supports fast charging from identification information about the power supply device received through the communication circuit, and

transmit a second authentication request message to the power supply device through the communication circuit in case that there is no response from the power supply device within a designated time after transmitting the first authentication request message.

9 . A method for operating a power supply device, the power supply device comprising an authentication circuit and power supply circuits, each of the power supply circuits comprising a coil and a communication circuit and being configured to transmit a power signal to an external power reception device through the coil, the method comprising:

while transmitting the power signal to a first power reception device and a second power reception device, sending a first message for requesting authentication to the first power reception device and the second power reception device,

based on sending the first message, receiving, through a first communication circuit, a first authentication request message for fast charging from the first power reception device and receive, through a second communication circuit, a second authentication request message from a second power reception device,

determining the first power reception device as a first target to be authenticated and the second power reception device as a second target to be authenticated,

based on the first authentication request message, authenticating the first power reception device by relaying an exchange of a data signal between the authentication circuit and the first power reception device,

based on completely authenticating the first power reception device, sending, through the second communication circuit, a second message for requesting authentication to the second power reception device while maintaining transmission of the power signal from a second power supply circuit to the second power reception device,

based on sending the second message, receiving, through the second communication circuit, a third authentication request message from the second power reception device, and

based on the third authentication request message, authenticating the second power reception device by relaying an exchange of a data signal between the authentication circuit and the second power reception device.

10 . The method of claim 9 , wherein the determining comprises determining an authentication order according to a chronological order in which the first authentication request message and the second authentication request message are received from the first power reception device and the second power reception device respectively.

11 . The method of claim 9 ,

wherein charging pads which correspond to the power supply circuits and on which the first and second power reception devices are respectively mounted on are provided, and

wherein the determining comprises determining an authentication order according to an order designated for the charging pads.

12 . The method of claim 9 , wherein the determining comprises determining an authentication order, based on identification information about the first power reception device and the second power reception device.

13 . The method of claim 9 , wherein the receiving of the first authentication request message for the fast charging comprises:

while the power supply device supplies power to the first power reception device and the second power reception device in a slow charging mode, receiving authentication request messages from the first power reception device and the second power reception device.