Patent ID: 11903040
Assignee: HYUNDAI MOTOR COMPANY
Field: Transport (Mechanical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A connection establishment method, performed by an electric vehicle (EV) being supplied power from a power supply device, the connection establishment method comprising:
scanning beacon broadcast in a low-level communication scheme from a plurality of chargers;
calculating signal attenuations for a plurality of scanned beacon signals;
selecting an electric vehicle supply equipment (EVSE) associated with a charger of the plurality of chargers that transmits a first beacon signal having the minimum signal attenuation;
confirming whether a first EVSE information acquired through the first beacon signal matches a second EVSE information in a vendor specific element (VSE) information acquired through a probe response with the selected EVSE or a wireless local area network (WLAN) beacon from the selected EVSE;
establishing a communication connection with the selected EVSE when the first and second EVSE information are matched;
after establishing the communication connection with the selected EVSE, comparing signal attenuation of the first beacon signal with a signal attenuation of a second beacon signal of the plurality of beacon signals transmitted by another charger of the plurality of chargers associated with another EVSE with which a communication connection has not been established; and
determining whether the signal attenuation value of the first beacon signal is lower than the signal attenuation value of the second beacon signal and whether a position alignment for wireless power transfer of the EV is completed;
wherein the calculating, selecting, confirming, establishing, comparing, and determining are repeated when the signal attenuation value of the first beacon signal is greater than or equal to the signal attenuation value of the second beacon signal or when the position alignment is not completed.