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EP-4737201-A1 - POWER SYSTEM, AND ELECTRIC-POWERED VEHICLE

EP4737201A1EP 4737201 A1EP4737201 A1EP 4737201A1EP-4737201-A1

Abstract

A power system (1) includes power equipment (5) and an electric-powered vehicle (6). The power equipment (5) includes a powering unit and a storage unit. The powering unit powers a power grid (PG) in each of a first period and a second period. The storage unit stores grid code information. The electric-powered vehicle (6) includes a storage device and a control device. When the first period begins, the control device obtains the grid code information from the power equipment (5) and controls the transmit power during the first period, in accordance with the obtained grid code information. The control device stores the obtained grid code information into the storage device. If a predetermined condition is met, the predetermined condition indicating that the electric-powered vehicle (6) has been in stationary across a third period, the control device controls the transmit power during the second period, in accordance with the grid code information stored in the storage device.

Inventors

  • NAKAMURA, TOHRU

Assignees

  • TOYOTA JIDOSHA KABUSHIKI KAISHA

Dates

Publication Date
20260506
Application Date
20250930

Claims (6)

  1. A power system (1), comprising: power equipment (5) configured to be connected to a power grid (PG); and an electric-powered vehicle (6), wherein the power equipment (5) includes: a powering unit (52) configured to receive transmit power from the electric-powered vehicle (6) and power the power grid (PG) in each of a first period and a second period subsequent to the first period, the first period and the second period each being a period during which power supply regulation is performed at the power grid (PG); and a storage unit (58) for storing grid code information indicating a rule for powering the power grid (PG) by the powering unit (52), wherein the electric-powered vehicle (6) includes: a storage device (77); a communication device (70) for communicating with the power equipment (5); a power output device (61, 62) for outputting the transmit power to the power equipment (5); and a control device (79) configured to obtain the grid code information from the power equipment (5) through the communication device (70) when the first period begins and to control the transmit power during the first period, in accordance with the obtained grid code information, wherein the control device (79) is configured to store the obtained grid code information into the storage device (77), and the control device (79) is configured to control the transmit power during the second period, in accordance with the grid code information stored in the storage device (77), when the second period begins and a predetermined condition is met, the predetermined condition indicating that the electric-powered vehicle (6) has been in stationary across a third period from an end of the first period to a beginning of the second period.
  2. The power system (1) according to claim 1, wherein the power equipment (5) further includes a power cable (51b) for transmission of the transmit power and a connector (57) attached to the power cable (51b), the electric-powered vehicle (6) further includes an inlet (60) to which the connector (57) is connected, and the predetermined condition includes a condition that the connector (57) is kept connected to the inlet (60) across the third period.
  3. The power system (1) according to claim 1, wherein the electric-powered vehicle (6) further includes a shift lever (72), and the predetermined condition includes a condition that the shift lever (72) is fixed at a parking range across the third period.
  4. The power system (1) according to claim 1, wherein the storage unit (58) is configured to further store identification information of the power equipment (5), the control device (79) is configured to obtain the identification information of first equipment through the communication device (70) from the first equipment as the power equipment (5) that receives the transmit power during the first period, the control device (79) is configured to obtain the identification information of second equipment through the communication device (70) from the second equipment as the power equipment (5) that receives the transmit power during the second period, and the control device (79) is configured to control the transmit power to the second equipment during the second period, in accordance with the grid code information stored in the storage device (77), when the identification information of the second equipment is the same as the identification information of the first equipment.
  5. The power system (1) according to any one of claims 1 to 4, wherein the grid code information includes a predetermined threshold of a frequency or a voltage of the power grid (PG), for limiting the powering by the powering unit (52).
  6. An electric-powered vehicle (6) configured to output transmit power to power equipment (5) that powers a power grid (PG) during a period of power supply regulation at the power grid (PG), the electric-powered vehicle (6) comprising: a storage device (77); a communication device (70) for communicating with the power equipment (5); a power output device (61, 62) configured to output the transmit power to the power equipment (5); and a control device (79) configured to obtain grid code information from the power equipment (5) through the communication device (70), when a first period, which is the period for the power supply regulation, begins, and to control the transmit power during the first period, in accordance with the obtained grid code information, wherein the grid code information indicates a rule for powering the power grid (PG) by the power equipment (5), the control device (79) is configured to store the obtained grid code information into the storage device (77), and the control device (79) is configured to control the transmit power during a second period, in accordance with the grid code information stored in the storage device (77), when the second period, which is a period for the power supply regulation after the first period, begins and a predetermined condition is met, the predetermined condition indicating that the electric-powered vehicle (6) has been in stationary across a third period from an end of the first period to a beginning of the second period.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is based on Japanese Patent Application No. 2024-189818 filed on October 29, 2024 with the Japan Patent Office, the entire content of which is hereby incorporated by reference. BACKGROUND Field The present disclosure relates to a power system, and an electric-powered vehicle. Description of the Background Art Japanese Patent Laying-Open No. 2020-22311 discloses a grid-connected system. The system includes an electric-powered vehicle, power equipment, and an interconnection device. The electric-powered vehicle includes a power storage device. The power equipment includes a power conversion device for allowing the power storage device to discharge power. The interconnection device connects a power grid and the power equipment. SUMMARY When the electric-powered vehicle is to participate in power supply regulation at the power grid, the electric-powered vehicle transmits power to the power equipment. The power equipment receives the power and powers the power grid. When the electric-powered vehicle is to participate in the power supply regulation as noted above, the electric-powered vehicle, initially, obtains grid code information indicating a rule for powering the power grid by the power equipment. Subsequently, the electric-powered vehicle controls transmit power to the power equipment in accordance with the obtained grid code information, thereby appropriately participating in the power supply regulation. However, it can take a lot of time for the communications for the electric-powered vehicle to obtain the grid code information from the power equipment. As a result, the timing of the start of output of the transmit power from the electric-powered vehicle to the power equipment delays, and the timing of the start of powering from the power equipment to the power grid may, therefore, delay. In this case, the electric-powered vehicle may not be able to promptly participate in the power supply regulation. The present disclosure is made to solve problems as noted above, and an object of the present disclosure is to provide a power system and an electric-powered vehicle which enable the electric-powered vehicle to promptly participate in the power supply regulation. A power system according to the present disclosure includes power equipment and an electric-powered vehicle. The power equipment is connected to a power grid. The power equipment includes a powering unit and a storage unit. The powering unit receives transmit power from the electric-powered vehicle and powers the power grid in each of a first period and a second period subsequent to the first period, the first period and the second period each being a period during which power supply regulation is performed at the power grid. The storage unit stores grid code information indicating a rule for powering the power grid by the powering unit. The electric-powered vehicle includes a storage device, a communication device, a power output device, and a control device. The communication device communicates with the power equipment. The power output device outputs the transmit power to the power equipment. The control device, as the first period begins, obtains the grid code information from the power equipment through the communication device and controls the transmit power during the first period, in accordance with the obtained grid code information. The control device stores the obtained grid code information into the storage device, and when the second period begins and a predetermined condition is met, the predetermined condition indicating that the electric-powered vehicle has been in stationary across a third period from an end of the first period to a beginning of the second period, the control device controls the transmit power during the second period, in accordance with the grid code information stored in the storage device. With the above configuration, if the electric-powered vehicle remains stationary across the third period and participates in the power supply regulation during the second period, the transmit power during the second period is controlled in accordance with the grid code information stored in the storage device. If the electric-powered vehicle is in stationary across the third period, the same power equipment is used in the first period and the second period. Thus, the grid code information stored in the storage device is suitable grid code information to be used in the second period. Accordingly, the electric-powered vehicle is not required to obtain, again, the grid code information from the power equipment in order to participate in the power supply regulation during the second period. Stated differently, a communication process for obtaining the grid code information at the beginning of the second period can be obviated. As a result, the output of the transmit power from the electric-powered vehicle to the power equipment during the second period can start earlier by t