Wireless charging device and system for transportation equipment

A wireless power reception method of a wireless power reception device for a transportation apparatus, the wireless power reception method comprising:

• establishing short-range wireless communication with a wireless power transmission device when a wireless power signal transmitted by the wireless power transmission device is detected in an idle state;
• receiving a first power signal to perform charging;
• receiving safety status information through in-vehicle communication;
• and
• controlling a strength of received power based on the safety status information, wherein the transportation apparatus includes a first sensing device and a controller,
• and further including:
• generating with the controller first safety status information based on sensing information received from the first sensing device through the in-vehicle communication,
• transmitting the first safety status information to the wireless power reception device, and
• determining whether passengers have exited the transportation apparatus before establishing the short-range wireless communication,
• wherein, when all passengers have exited, the short-range wireless communication is established.

A wireless power transmission method of a wireless power transmission device, the wireless power transmission method comprising:

• identifying a wireless power reception device;
• establishing short-range wireless communication with the identified wireless power reception device;
• transmitting a first power signal to the wireless power reception device;
• receiving a power control signal through the short-range wireless communication;
• and
• controlling a strength of transmitted power based on the power control signal,
• wherein the wireless power reception device is mounted in a transportation apparatus having a first sensing device and a controller, and the power control signal is generated based on safety status information collected in correspondence with the transportation apparatus, and
• wherein the controller generates first safety status information based on sensing information received from the first sensing device through the in-vehicle communication and transmits the first safety status information to the wireless power reception device;
• and
• further including:
• generating second safety status information based on sensing information received from a second sensing device which does not interwork with the transportation apparatus;
• and
• transmitting the second safety status information to the wireless power reception device through the short-range wireless communication.

A wireless power reception device for a transportation apparatus, the wireless power reception device comprising:

• a power reception unit configured to receive a wireless power signal;
• a first communication unit configured to perform short-range wireless communication with a wireless power transmission device;
• a second communication unit configured to perform in-vehicle communication;
• and
• a first controller configured to determine a strength of required power based on status information received through the second communication unit,
• wherein the status information includes:
• boarding status information for identifying whether passengers of the transportation apparatus have exited;
• and
• safety status information including distances between the passengers and the wireless power reception device,
• wherein, upon determining that all the passengers have exited and been spaced apart from the wireless power reception device by a predetermined reference value or more while first power is received, a second power higher than the first power is requested from the wireless power transmission device through the first communication unit.