Electric power transmission device, vehicle, and non-contact electric power transmission and reception system

A vehicle configured to be able to receive electric power in a non-contact manner from an electric power transmission device outside the vehicle, the vehicle comprising:

• an electric power reception portion for receiving electric power in a non-contact manner from the electric power transmission device;
• a communication portion for communicating with the electric power transmission device;
• and
• a control device controlling the electric power reception portion and the communication portion, the control device:
• checking whether the electric power reception portion and an electric power transmission portion of the electric power transmission device are properly positioned relative to each other after the vehicle completes positioning with respect to the electric power transmission portion and before electric power transmission from the electric power transmission portion to the electric power reception portion;
• transmitting a requesting signal to the electric power transmission device;
• transmitting a positioning request after communication has been established;
• informing a user about position information based on a weak electric power from the electric power transmission portion;
• and
• checking whether the electric power reception portion and the electric power transmission portion are properly positioned relative to each other after positioning.

A non-contact electric power transmission and reception system comprising:

• a vehicle configured to be able to receive in a non-contact manner electric power from outside of the vehicle;
• and
• an electric power transmission device externally transmitting electric power to the vehicle, the electric power transmission device including:
• an electric power transmission portion for transmitting electric power in a non-contact manner to the vehicle;
• a first communication portion for communicating with the vehicle;
• and
• a first control device controlling the electric power transmission portion and the first communication portion;
• the vehicle including:
• an electric power reception portion for receiving electric power in a non-contact manner from the electric power transmission portion;
• a second communication portion for communicating with the first communication portion;
• and
• a second control device controlling the electric power reception portion and the second communication portion;
• at least one of the first control device and the second control device checking whether the electric power reception portion and the electric power transmission portion are properly positioned relative to each other after the vehicle completes positioning with respect to the electric power transmission portion and before electric power transmission from the electric power transmission portion to the electric power reception portion;
• the first control device allowing the electric power transmission portion to start electric power transmission to the vehicle based on a request from the vehicle when the electric power reception portion and the electric power transmission portion are properly positioned relative to each other;
• the first control device causing the electric power transmission portion to transmit weak electric power based on a positioning request from the vehicle;
• at least one of the first control device and the second control device checking whether the electric power reception portion and the electric power transmission portion are properly positioned relative to each other after positioning using the weak electric power;
• and
• the first control device causing the electric power transmission portion to transmit electric power based on a charging request, the transmitted electric power being larger than the weak electric power.