Vehicle, power adjustment system, and power equipment

Power equipment configured to supply electric power to a vehicle, the vehicle being configured to be connected to a power grid and to participate in energy adjustment for adjusting a power supply and demand balance in the power grid, the vehicle including:

• a power receiving device configured to receive electric power supplied from the power equipment when connected to the power equipment;
• a first power storage device configured to be charged with the electric power received by the power receiving device;
• a second power storage device connected to the first power storage device and configured to be charged with electric power of the first power storage device;
• and
• a communication device configured to communicate with the power equipment by using electric power of the second power storage device, wherein a communication sequence between the communication device and the power equipment includes a first sequence for exchanging advance information prior to start of charging and a second sequence for exchanging minimally required transmission information for starting charging,
• the power equipment comprising:
• a power supply device configured to supply the electric power to the power receiving device when connected to the power receiving device;
• and
• a communication unit configured to acquire a state of charge of the first power storage device from the vehicle,
• wherein, when the vehicle does not participate in the energy adjustment and the state of charge of the first power storage device is lower than a threshold value when the power receiving device is connected to the power equipment, the communication device is configured to complete only the second sequence without completing the first sequence, and then the first power storage device is charged with minute electric power smaller than supplied electric power in a case where the vehicle participates in the energy adjustment, and
• after the state of charge of the first power storage device reaches the threshold value, the communication device is configured to complete the communication sequence including at least the first sequence, and then the first power storage device is charged with electric power larger than the minute electric power.