Patent ID: 11897359
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 6:
7. An electric power calculation method of calculating, in an electric power system including a vehicle, a charging stand, and a server, an amount of electric power transferred by the vehicle,
the vehicle being configured to perform
external charging of charging a battery with electric power supplied from outside the vehicle, and
external discharging of supplying electric power of the battery to outside the vehicle,

the charging stand being configured to transfer electric power between an AC power supply outside the vehicle and the vehicle in the external charging and the external discharging,
the server being configured to communicate with the vehicle and the charging stand,
in the external charging and the external discharging, when electric power transferred between the vehicle and the charging stand is AC power, the vehicle including
a first charger that converts AC power supplied from the charging stand into DC power and converts DC power supplied from the battery into AC power, and
a first detector that detects electric power input to and output from the first charger,

the electric power calculation method comprising:
measuring, by the vehicle, charging power supplied from the charging stand or discharging power supplied to the charging stand using a detection value of the first detector; and
transmitting, by the vehicle to the server, a first measurement value that is a result of the measurement, and
in the external charging and the external discharging, when electric power transferred between the vehicle and the charging stand is DC power,
the charging stand including
a second charger that converts AC power supplied from the AC power supply into DC power and converts DC power supplied from the vehicle into AC power, and
a second detector that detects electric power input to and output from the second charger, and

the electric power calculation method further comprising:
measuring, by the charging stand, charging power supplied to the vehicle or discharging power supplied from the vehicle using a detection value of the second detector; and
transmitting, by the charging stand to the server, a second measurement value that is a result of the measurement.