WO2024062546A1

WO2024062546A1 - Charging/discharging system, charging/discharging management device, charging/discharging management method, and charging/discharging management program

Info

Publication number: WO2024062546A1
Application number: PCT/JP2022/035102
Authority: WO
Inventors: 猛馬場
Original assignee: 住友電気工業株式会社; 住友電装株式会社; 株式会社オートネットワーク技術研究所
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2024-03-28

Abstract

A charging/discharging system according to the present invention comprises: electric wiring arranged in a parking facility and connected to a grid power supply; one or a plurality of connectors provided to the end of the electric wiring and connected to a charging/discharging device for charging and discharging an onboard battery of an electric vehicle; and a charging/discharging management device that controls the charging/discharging device connected to the connector and that manages charging/discharging of the onboard battery through the electric wiring. If the supply of electric power from the grid power supply is stopped, the charging/discharging management device causes the charging/discharging device to supply electric power discharged from the onboard battery through the electric wiring.

Description

Charge/discharge system, charge/discharge management device, charge/discharge management method, and charge/discharge management program

This disclosure relates to a charge/discharge system, a charge/discharge management device, a charge/discharge management method, and a charge/discharge management program.

Patent Document 1 discloses an emergency power transmission control system for a parking lot, which transmits power discharged from the storage batteries of cars parked in the parking lot to the power company in an emergency. This system determines whether an emergency has occurred that requires power transmission to the power company, and if it determines that an emergency has occurred, it performs control to transmit the power discharged from the storage batteries of cars parked in the parking lot to the power company.

JP 2012-135153 A

A charging/discharging system according to one aspect of the present disclosure includes electrical wiring arranged in a parking facility and connected to a grid power source, and a charging/discharging system provided at an end of the electrical wiring for charging/discharging an on-board battery of an electric vehicle. The charging and discharging management device includes a connector connected to the device, and a charging and discharging management device that controls the charging and discharging device connected to the connector and manages charging and discharging of the in-vehicle battery through the electrical wiring. The charging/discharging device is configured to supply electric power discharged from the vehicle-mounted battery to the electrical wiring when power supply from the system power source is stopped.

The present disclosure can be realized not only as a charging/discharging system having the above-mentioned characteristic configuration, but also as a charging/discharging management device included in the charging/discharging system, or as a characteristic processing in the charging/discharging management device. It can be realized as a charging/discharging management method with steps. The present disclosure can be implemented as a computer program that causes a computer to function as a charge/discharge management device, or a part or all of the charge/discharge management device can be implemented as a semiconductor integrated circuit.

FIG. 1 is a diagram showing an example of the overall configuration of a charging/discharging system according to an embodiment. FIG. 2 is a diagram showing electrical connection relationships in the charging/discharging system according to the embodiment. FIG. 3 is a block diagram showing an example of the hardware configuration of the charging/discharging device according to the embodiment. FIG. 4 is a circuit diagram showing an example of the configuration of a power conversion circuit in a charge/discharge device. FIG. 5 is a block diagram illustrating an example of a hardware configuration of the charge and discharge management device according to the embodiment. FIG. 6 is a functional block diagram showing an example of the functions of the charge/discharge management device according to the embodiment. FIG. 7 is a diagram showing an example of a management table in normal mode. FIG. 8 is a diagram showing an example of a management table in emergency mode. FIG. 9 is a diagram showing another example of the management table in the emergency mode. FIG. 10 is a diagram showing still another example of the management table in the emergency mode. FIG. 11 is a flowchart illustrating an example of mode setting processing by the charge/discharge management device according to the embodiment. FIG. 12 is a flowchart illustrating an example of the first management process of the charge/discharge management device according to the embodiment. FIG. 13 is a flowchart illustrating an example of the second management process of the charge/discharge management device according to the embodiment. FIG. 14 is a flowchart illustrating an example of discharge control processing. FIG. 15 is a flowchart illustrating an example of charging control processing.

<Issues that this disclosure seeks to solve>
Power outages may occur during disasters such as earthquakes, typhoons, and floods. When a parking lot is used as an evacuation site during a power outage, it is necessary to manage power within the evacuation site, which is cut off from the grid power supply, in order for evacuees to live or to carry out rescue operations. However, the system disclosed in Patent Document 1 does not pay attention to power management during a power outage, and cannot use a parking lot as an evacuation site.

<Effects of this disclosure>
According to the present disclosure, in the event of a power outage, a parking lot can be used as an evacuation site for evacuees to live in or for rescue operations.

<Summary of embodiments of the present disclosure>
Hereinafter, an overview of the embodiments of the present disclosure will be listed and described.

(1) The charging and discharging system according to the present embodiment includes electrical wiring that is placed in a parking facility and connected to a grid power supply, and a charging and discharging system that is installed at the end of the electrical wiring and is used to charge and discharge the on-board battery of an electric vehicle. comprising one or more connectors connected to a discharge device, and a charge/discharge management device that controls the charge/discharge device connected to the connector and manages charge/discharge of the in-vehicle battery through the electrical wiring, The charge/discharge management device causes the charge/discharge device to supply power discharged from the vehicle-mounted battery to the electrical wiring when power supply from the system power source is stopped. This allows the on-vehicle battery to be used as an emergency power source in the event of a power outage. Therefore, in the event of a power outage, the parking lot can be used as an evacuation site, and evacuees can live or perform rescue operations using the power supplied from the on-board battery. Note that the term "parking facility" refers to a public parking lot that is equipped with electrical wiring for charging the on-vehicle battery of an electric vehicle, and it does not matter whether it is a multi-story parking lot or a flat parking lot.

(2) In (1) above, the charging/discharging management device is configured to charge/discharge the in-vehicle battery with the power supplied from the grid power source to the charging/discharging device when the power supply from the grid power source is not stopped. The vehicle may operate in a normal mode in which the vehicle is charged, and in an emergency mode in which the charging/discharging device discharges the vehicle-mounted battery when power supply from the system power source is stopped. Thereby, the charge/discharge management device can perform power management in the normal mode when there is no power outage, and can perform power management in the emergency mode during the time of a power outage. Therefore, appropriate power management is possible depending on the situation.

(3) In (2) above, the charging/discharging management device, in the emergency mode, connects the first charging/discharging device to the first connector provided at the first end of the electrical wiring. The second charging and discharging device is connected to a second charging and discharging device that is connected to a second connector provided at a second end of the electrical wiring. A second vehicle-mounted battery of a second vehicle connected to the second vehicle may be charged. Thereby, in the emergency mode, the first vehicle-mounted battery of the first vehicle can be used as a power source to charge the second vehicle-mounted battery of the second vehicle.

(4) In (2) above, the charging/discharging management device selects a vehicle connected to a charging/discharging device connected to some of the plurality of connectors as a power source in the emergency mode, and A vehicle connected to a charging/discharging device connected to another part of the plurality of connectors may be selected as a charging target. Thereby, in the emergency mode, it is possible to select a vehicle to be used as a power source and a vehicle to be charged.

(5) In (4) above, the charge/discharge management device stores remaining power amount information indicating the remaining power amount of the on-vehicle batteries of the plurality of vehicles connected to the plurality of charge/discharge devices connected to the plurality of connectors. Based on the obtained remaining power amount information, some of the plurality of vehicles may be selected as power sources, and another part of the plurality of vehicles may be selected as charging targets. Thereby, a vehicle to be used as a power source and a vehicle to be charged can be selected based on the remaining power amount of each vehicle-mounted battery.

(6) In (5) above, the charge/discharge management device selects as a power source a vehicle in which the remaining power amount of the in-vehicle battery is greater than the first value, and selects as a power source a vehicle in which the remaining power amount of the in-vehicle battery is less than or equal to the first value. A vehicle smaller than the second value may be selected as a charging target. As a result, an on-vehicle battery with sufficient remaining power can be used as a power source, and an on-vehicle battery with a small amount of remaining power can be charged.

(7) In (5) or (6) above, the charge/discharge management device performs the charging based on the remaining power of the on-board batteries of some of the vehicles selected as the charging target. The amount of charge to the on-vehicle batteries of some other vehicles among the plurality of vehicles selected as targets may be determined. Thereby, the amount of charge can be adjusted between the on-vehicle batteries to be charged.

(8) In any one of (4) to (7) above, the charge/discharge management device acquires identification information of a plurality of vehicles connected to a plurality of charge/discharge devices connected to the plurality of connectors. However, a vehicle whose identification information matches specific identification information may be selected as the power source. Thereby, the vehicle to which specific identification information is assigned can be used preferentially as a power source.

(9) In any one of (4) to (7) above, the charge/discharge management device acquires identification information of a plurality of vehicles connected to a plurality of charge/discharge devices connected to the plurality of connectors. However, a vehicle whose identification information matches specific identification information may be selected as a charging target. Thereby, it is possible to preferentially charge a vehicle to which specific identification information has been assigned.

(10) In any one of (2) to (9) above, the charging/discharging system converts the shared battery located in the parking facility and the electric power output from the shared battery, and The charge/discharge management device further includes a power conversion device that outputs power to the electric wiring, and the charge/discharge management device is configured to convert the power conversion device into the power conversion device when the remaining power amount of the shared battery is equal to or higher than a reference value in the emergency mode. causing the device to supply the electric power discharged from the common battery to the electrical wiring, and in the emergency mode, when the remaining power amount of the common battery is less than the reference value, the charging/discharging device Electric power discharged from the vehicle battery may be supplied to the electrical wiring. As a result, if the shared battery has sufficient remaining power, the shared battery can be used as a power source, and if the shared battery has little remaining power, the on-vehicle battery can be used as a power source.

(11) In any one of (1) to (10) above, the charging/discharging system may include a charging/discharging device connected to the connector.

(12) The charge/discharge management device according to the present embodiment is a charge/discharge management device that manages charging and discharging of a vehicle battery through electrical wiring arranged in a parking facility and connected to a grid power supply, and which A control unit for controlling a charging/discharging device for charging and discharging an on-board battery of an electric vehicle is connected to one or more connectors provided at a terminal, and the control unit is configured to control a power supply from the system power supply. When the vehicle is stopped, the charging/discharging device is caused to supply electric power discharged from the vehicle-mounted battery to the electrical wiring. This allows the on-vehicle battery to be used as an emergency power source in the event of a power outage. Therefore, in the event of a power outage, the parking lot can be used as an evacuation site, and evacuees can live or perform rescue operations using the power supplied from the on-board battery.

(13) The charging/discharging management method according to the present embodiment is a charging/discharging management method for managing the charging/discharging of a vehicle battery through electrical wiring arranged in a parking facility and connected to a grid power source, the method comprising: It includes the step of controlling a charging/discharging device for charging and discharging an onboard battery of an electric vehicle, which is connected to one or more connectors provided at a terminal, and in the controlling step, power supply from the grid power supply is controlled. When the vehicle is stopped, the charging/discharging device is caused to supply electric power discharged from the vehicle-mounted battery to the electrical wiring. This allows the on-vehicle battery to be used as an emergency power source in the event of a power outage. Therefore, in the event of a power outage, the parking lot can be used as an evacuation site, and evacuees can live or perform rescue operations using the power supplied from the on-board battery.

(14) The charge/discharge management program according to this embodiment is a charge/discharge management program used by a charge/discharge management device that manages charging/discharging of a vehicle battery through electrical wiring that is placed in a parking facility and connected to a grid power source. and causing the computer to execute the step of controlling a charging/discharging device connected to one or more connectors provided at the end of the electrical wiring for charging and discharging the on-board battery of the electric vehicle, and controlling the charging/discharging device. In the step, when the power supply from the grid power source is stopped, the computer controls the charging/discharging device so that the charging/discharging device supplies the electric power discharged from the vehicle battery to the electric wiring. . This allows the on-vehicle battery to be used as an emergency power source in the event of a power outage. Therefore, in the event of a power outage, the parking lot can be used as an evacuation site, and evacuees can live or perform rescue operations using the power supplied from the on-board battery.

<Details of the embodiment of the present disclosure>
Hereinafter, the details of the embodiments of the present invention will be described with reference to the drawings. Note that at least some of the embodiments described below may be combined in any desired manner.

[1. Charging/discharging system]
FIG. 1 is a diagram showing an example of the overall configuration of a charging/discharging system according to an embodiment. The charging and discharging system 10 charges and discharges the on-vehicle battery of the electric vehicle 40 at the parking facility 11 . The charging/discharging system 10 is provided in a parking facility 11. The charging/discharging system 10 includes electrical wiring 20, a plurality of connectors 21, and a charging/discharging management device 50.

The electrical wiring 20 is connected to the grid power supply. Transmits AC power supplied from the grid power supply. The electrical wiring 20 is routed to the parking facility 11. For example, the parking facility 11 is a self-propelled multi-level parking lot and includes a plurality of floors. The electrical wiring 20 is wired to each floor of the parking facility 11.

The electrical wiring 20 includes a plurality of ends, and a connector 21 is provided at each end. The connector 21 is provided on each floor of the parking facility 11. The connector 21 can be connected to a charging/discharging device 30 used for charging/discharging an on-vehicle battery of the electric vehicle 40. More specifically, a plug 31 provided on the charging/discharging device 30 can be inserted into the connector 21 .

The charging/discharging device 30 has a plug 32 for connecting to the electric vehicle 40. The plug 32 can be inserted into an inlet provided on the electric vehicle 40. By connecting the plug 31 to the connector 21 and connecting the plug 32 to the electric vehicle 40, the charging/discharging device 30 can charge and discharge the on-vehicle battery of the electric vehicle 40.

The electrical wiring 20 is connected to a power line 23 via a distribution board 22. Power line 23 is connected to a grid power source.

The charging/discharging management device 50 controls the charging/discharging device 30 connected to the connector 21 and manages charging/discharging of the vehicle battery through the electrical wiring 20. The charge/discharge management device 50 is connected to a wireless communication device 51. The wireless communication device 51 is capable of wireless communication using a specific communication protocol. For example, the charging/discharging device 30 has a wireless communication function and is capable of wireless communication using a specific communication protocol. The charge/discharge management device 50 and the charge/discharge device 30 can communicate wirelessly, for example.

The charge/discharge management device 50 is placed in the management room 12 within the parking facility 11. The charge/discharge management device 50 is operated, for example, by an administrator who manages the parking facility 11. The charge/discharge management device 50 includes an input device and a display device. The administrator can input information into the charging/discharging management device 50 using the input device and monitor the charging/discharging status of the entire parking facility 11 using the display device.

The charging/discharging system 10 further includes a solar power generation device 60, a shared battery 70, and a power conversion device 80.

The solar power generation device 60 is placed at a location where it can receive sunlight during the day, such as on the roof of the parking facility 11, for example. The power generated by the solar power generation device 60 is stored in the shared battery 70. The power conversion device 80 can convert the DC power output from the solar power generation device 60 into voltage and output DC power at a predetermined voltage. The output power from the power conversion device 80 is supplied to the shared battery 70, and the shared battery 70 is charged.

A power line 85 extends from the power conversion device 80. The power line 85 is connected to a connection point in the middle of the power line 23.

FIG. 2 is a diagram showing electrical connection relationships in the charging/discharging system according to the embodiment.

The charge/discharge management device 50 is connected to the power converter 80 by a signal line, and controls the power converter 80. The charge/discharge management device 50 can perform the following energy management by controlling the power conversion device 80.

Power conversion device 80 includes a step-up DC/DC converter 81, a bidirectional AC/DC converter 82, and a bidirectional DC/DC converter 83. The step-up DC/DC converter 81 is connected to the solar power generation device 60 by a power line, boosts the DC power input from the solar power generation device 60, and outputs the boosted DC power.

The output power from the step-up DC/DC converter 81 is input to the bidirectional DC/DC converter 83. The bidirectional DC/DC converter 83 converts the voltage of the input DC power. The bidirectional DC/DC converter 83 is connected to the common battery 70 by a power line, outputs DC power after voltage conversion to the common battery 70, and charges the common battery 70.

As described above, the charge/discharge management device 50 controls the power conversion device 80 and charges the shared battery 70 with the power generated by the solar power generation device 60 during the day.

The bidirectional AC/DC converter 82 is connected to the power line 85 , and AC power from the system power supply 90 can be input from the power line 85 . Bidirectional AC/DC converter 82 converts input AC power into DC power. The converted DC power is input from the bidirectional AC/DC converter 82 to the bidirectional DC/DC converter 83 . The bidirectional DC/DC converter 83 converts the voltage of the DC power input from the bidirectional AC/DC converter 82, outputs the DC power after voltage conversion to the shared battery 70, and charges the shared battery 70.

The charge/discharge management device 50 controls the power conversion device 80 and transfers the power supplied from the grid power source 90 to the shared battery 70 during times when the solar power generation device 60 is not suitable for power generation, such as at night or during bad weather. can be charged to.

Furthermore, the power conversion device 80 can discharge the shared battery 70. Bidirectional DC/DC converter 83 converts DC power output from shared battery 70 and outputs the DC power after voltage conversion to bidirectional AC/DC converter 82 . Bidirectional AC/DC converter 82 converts input DC power into AC power, and outputs the AC power to power line 85.

The charge/discharge management device 50 can reversely flow a part of the power stored in the common battery 70 from the power line 85 to the system power supply 90 when the remaining power amount of the common battery 70 is sufficient.

The shared battery 70 is shared by multiple users, unlike an in-vehicle battery. For example, instead of the power from the system power supply 90, power stored in the shared battery 70 can be supplied to the charging/discharging device 30 through the electrical wiring 20 to charge the electric vehicle 40.

The charge/discharge management device 50 operates in the normal mode when the power supply from the grid power supply 90 is not stopped, and operates in the emergency mode when the power supply from the grid power supply 90 is stopped. . The charging/discharging management device 50 causes the charging/discharging device 30 to charge the on-vehicle battery of the electric vehicle 40 with the power supplied from the grid power supply 90 in the normal mode. The charge/discharge management device 50 causes the charge/discharge device 30 to discharge the on-vehicle battery of the electric vehicle 40 in the emergency mode. This allows the vehicle battery to be used as an emergency power source.

A wattmeter 24 and a relay 25 are connected to each connector 21.

The charge/discharge management device 50 is connected to each relay 25 by a signal line, and can control each relay 25. The relay 25 connects the corresponding connector 21 and the electrical wiring 20 in the on state, and electrically disconnects the corresponding connector 21 in the off state.

When the relay 25 is in the on state, the power meter 24 can measure the amount of power output to the charging/discharging device 30 connected to the corresponding connector 21, i.e., the amount of charge of the vehicle battery. When the relay 25 is in the on state, the power meter 24 can measure the amount of power output from the charging/discharging device 30 connected to the corresponding connector 21, i.e., the amount of discharge of the vehicle battery.

The charge/discharge management device 50 is connected to each wattmeter 24 by a signal line, and can receive the measured values of each wattmeter 24. The charge/discharge management device 50 can monitor the amount of charge and discharge of the vehicle battery based on the measured value of the wattmeter 24.

[2. Charging/discharging device]
FIG. 3 is a block diagram showing an example of the hardware configuration of the charging/discharging device according to the embodiment. The charging/discharging device 30 includes a power conversion circuit 301, a control circuit 302, a communication interface (communication I/F) 303, and a wireless communication I/F 304.

The power conversion circuit 301 is connected to the plug 31 via a power line. The plug 31 can be connected to the connector 21. The power conversion circuit 301 is connected to the plug 32 via a power line. The plug 32 can be connected to the electric vehicle 40.

The electric vehicle 40 includes an on-board battery 401, an on-board control device 402, and an inlet 403.

The on-vehicle battery 401 is a drive motor that supplies power to a motor (not shown) for propelling the electric vehicle 40.

The in-vehicle control device 402 manages the power of the in-vehicle battery 401. The on-vehicle control device 402 includes, for example, a processor, memory, communication I/F, and the like. The in-vehicle control device 402 can manage the charging state of the in-vehicle battery 401 and calculate the remaining power amount (SOC: State Of Charge). Unique identification information (ID) is assigned to the electric vehicle 40. The on-vehicle control device 402 can acquire the ID of the electric vehicle 40.

The inlet 403 includes a socket (not shown) connectable to the plug 32. Inlet 403 is connected to vehicle battery 401 by a power line. Inlet 403 is connected to vehicle-mounted control device 402 via a communication line.

FIG. 4 is a circuit diagram showing an example of the configuration of a power conversion circuit in a charging/discharging device. Power conversion circuit 301 includes a bidirectional AC/DC converter 311, a bidirectional AC/DC converter 312, a bidirectional AC/DC converter 313, and a transformer 314.

The bidirectional AC/DC converter 311 is connected to a power line extending from the plug 31. Bidirectional AC/DC converter 311 is connected to bidirectional AC/DC converter 312. Bidirectional AC/DC converter 312 and bidirectional AC/DC converter 313 are connected via a transformer 314. Bidirectional AC/DC converter 313 is connected to a power line extending from plug 32.

Each of the bidirectional AC/

DC converters

311, 312, and 313 is, for example, a full bridge circuit including a plurality of (four) switching elements. The switching element is, for example, a power semiconductor element such as an IGBT (insulated gate bipolar transistor) or a power MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor).

When charging the vehicle battery 401, the power conversion circuit 301 converts AC power input from the plug 31 into DC power, and outputs the DC power to the plug 32. Specifically, the bidirectional AC/DC converter 311 functions as a rectifying and smoothing circuit and converts input AC power into DC power. Bidirectional AC/DC converter 312 functions as a DC/AC converter and converts DC power to AC power by a switching operation. Transformer 314 converts the voltage of AC power. The bidirectional AC/DC converter 313 functions as a rectifying and smoothing circuit, and converts AC power after voltage conversion into DC power.

When discharging the vehicle battery 401, the power conversion circuit 301 converts the DC power input from the plug 32 into AC power, and outputs the AC power to the plug 31. Specifically, the bidirectional AC/DC converter 313 functions as a DC/AC converter and converts DC power to AC power by a switching operation. Transformer 314 converts the voltage of AC power. The bidirectional AC/DC converter 312 functions as a rectifying and smoothing circuit, and converts AC power after voltage conversion into DC power. The bidirectional AC/DC converter 313 functions as a DC/AC converter and converts DC power to AC power by a switching operation.

Returning to FIG. 3, the control circuit 302 is connected to the power conversion circuit 301. The control circuit 302 includes, for example, a processor, a memory, and the like. The control circuit 302 can cause the power conversion circuit 301 to selectively perform the charging function and the discharging function by controlling the switching operation of the power conversion circuit 301.

The communication I/F 303 is connected to a communication line extending from the plug 32. When the plug 32 is connected to the inlet 403, the communication I/F 303 is connected to the in-vehicle control device 402 through a communication line. Communication I/F 303 is used for communication with in-vehicle control device 402. The communication I/F 303 can perform communication using a specific communication protocol, for example, CAN (Controller Area Network).

The wireless communication I/F 304 is used for communication with the charge/discharge management device 50. The wireless communication I/F 304 can perform communication using a specific communication protocol, for example, TCP/IP (Transmission Control Protocol/Internet Protocol).

[3. Hardware configuration of charge/discharge management device]
FIG. 5 is a block diagram showing an example of the hardware configuration of the charge/discharge management device according to the embodiment. The charge/discharge management device 50 includes a processor 501, a nonvolatile memory 502, a volatile memory 503, an input device 504, a display device 505, and a communication I/F 506.

The volatile memory 503 is, for example, a semiconductor memory such as SRAM (Static Random Access Memory) or DRAM (Dynamic Random Access Memory). The nonvolatile memory 502 is, for example, a flash memory, a hard disk, a ROM (Read Only Memory), or the like. The nonvolatile memory 502 stores a charge/discharge management program 507 that is a computer program and data used to execute the charge/discharge management program 507. Each function of the charge/discharge management device 50 is performed by the processor 501 executing a charge/discharge management program 507 that is a computer program stored in the storage device of the computer. The charge/discharge management program 507 can be stored in a recording medium such as a flash memory, ROM, or CD-ROM. The processor 501 manages charging and discharging of the electric vehicle 40 in the charging and discharging system 10 using a charging and discharging management program 507.

The processor 501 is, for example, a CPU (Central Processing Unit). However, processor 501 is not limited to a CPU. The processor 501 may be a GPU (Graphics Processing Unit). Processor 501 is, for example, a multi-core processor. Processor 501 may be a single core processor. The processor 501 may be, for example, an ASIC (Application Specific Integrated Circuit), or a programmable logic device such as a gate array or an FPGA (Field Programmable Gate Array). In this case, the ASIC or programmable logic device is configured to be able to execute the same processing as the charge/discharge management program 507.

For example, the input device 504 includes a keyboard and a pointing device such as a mouse. Input device 504 may be a capacitive or pressure sensitive touch pad overlaid on the screen of display device 505 . The input device 504 is used to input data to the charge/discharge management device 50.

The display device 505 includes, for example, a liquid crystal panel or an OEL (organic electroluminescence) panel. The display device 505 can display text or graphic information.

The communication I/F 506 is used for communication with the charging/discharging device 30. The communication I/F 506 is, for example, a wired communication interface, and is connected to the wireless communication device 51 via a signal line. The communication I/F 506 may be a wireless communication interface. The communication I/F 506 can communicate using a specific communication protocol, for example TCP/IP.

[4. Functions of charge/discharge management device]
FIG. 6 is a functional block diagram showing an example of the functions of the charge/discharge management device according to the embodiment. When the processor 501 executes the charge/discharge management program 507, the charge/discharge management device 50 functions as a control section 511, a setting section 512, an acquisition section 513, a determination section 514, and a selection section 515.

The control unit 511 controls the charging/discharging device 30 connected to the connector 21. When the power supply from the grid power supply 90 is stopped, the control unit 511 uses the on-board battery 401 as a power source and causes the charging/discharging device 30 to supply the electric power discharged from the on-board battery 401 to the electrical wiring 20. .

The setting unit 512 sets the operation mode of the charge/discharge management device 50 to the normal mode when the power supply from the system power supply 90 is not stopped. Setting unit 512 sets the operation mode of charge/discharge management device 50 to emergency mode when power supply from system power supply 90 is stopped. For example, normal mode is the default operating mode. The setting unit 512 changes the setting of the operation mode of the charge/discharge management device 50 from the normal mode to the emergency mode when the power supply from the system power supply 90 is stopped, that is, at the time of a power outage.

The setting unit 512 switches the operating mode between the normal mode and the emergency mode, for example, in response to an instruction from the administrator. As another example, when a stop in power supply from the system power supply 90 is detected, the setting unit 512 may switch the operation mode from the normal mode to the emergency mode.

In the emergency mode, the control unit 511 controls, in the emergency mode, a charging/discharging device 30 (first charging/discharging device) connected to a certain connector 21 (first connector), and an electric vehicle 40 (first charging/discharging device) connected to the charging/discharging device 30. The on-vehicle battery 401 (first on-vehicle battery) of the vehicle) is discharged. In the emergency mode, the control unit 511 connects the charging/discharging device 30 (second charging/discharging device) connected to a connector (second connector) different from the connector 21 described above to the electric power connected to the charging/discharging device 30. The on-vehicle battery 401 (second on-vehicle battery) of the car 40 (second vehicle) is charged. That is, the control unit 511 uses one vehicle battery 401 as a power source to charge the other vehicle battery 401 in the emergency mode. In addition, in the emergency mode, the electrical wiring 20 is cut off from the system power supply by a circuit breaker at a point upstream from the connection point between the power line 85 and the power line 23 (at a point close to the system power supply 90). This prevents the occurrence of reverse power flow to the system power supply 90 when a power outage occurs.

In the emergency mode, the charge/discharge management device 50 may use the power stored in the shared battery 70 to charge the vehicle battery 401 of the electric vehicle 40. In a specific example, in the emergency mode, when the SOC of the shared battery 70 is equal to or greater than a reference value, the control unit 511 causes the power conversion device 80 to supply the power discharged from the shared battery 70 to the electrical wiring 20. In the emergency mode, when the SOC of the shared battery 70 is less than the reference value, the control unit 511 causes the charge/discharge device 30 to supply the power discharged from the vehicle battery 401 to the electrical wiring 20. In other words, when the SOC of the shared battery is equal to or greater than the reference value, the shared battery 70 is used as an emergency power source, and when the SOC of the shared battery is less than the reference value, the vehicle battery 401 of the electric vehicle 40 is used as an emergency power source.

The acquisition unit 513 acquires the SOC (remaining power amount information) of the on-board battery 401 from the electric vehicle 40. The acquisition unit 513 further acquires the ID (identification information) of the electric vehicle 40.

In the emergency mode, the selection unit 515 selects the electric vehicle 40 connected to the charging/discharging device 30 connected to some of the plurality of connectors 21 as a power source, and selects the electric vehicle 40 connected to the charging/discharging device 30 connected to some of the plurality of connectors 21 as the power source. The electric vehicle 40 connected to the charging/discharging device 30 connected to the section is selected as a charging target. In other words, the selection unit 515 selects the charge/discharge type for each electric vehicle 40 connected to the electric wiring 20 via the charge/discharge device 30. The selection unit 515 selects "discharge" as the charge/discharge type of the electric vehicle 40 used as a power source (discharge source). The selection unit 515 selects "charging" as the charging/discharging type of the electric vehicle 40 to be charged (charging destination).

For example, the SOC acquired by the acquisition unit 513 may be displayed on the display device 505. The administrator may determine the charging/discharging type of the electric vehicle 40 with reference to the SOC, and may input the determined charging/discharging type into the charging/discharging management device 50. The selection unit 515 can select the charge/discharge type of the electric vehicle 40 by assigning the input charge/discharge type to the electric vehicle 40 concerned.

In another example, the selection unit 515 may select the charging/discharging type of the electric vehicle 40 based on the SOC acquired by the acquisition unit 513. For example, the selection unit 515 selects "discharge" as the charge/discharge type of the electric vehicle 40 whose SOC is larger than the first value, and selects "charge" as the charge/discharge type of the electric vehicle 40 whose SOC is smaller than the second value. be able to. Here, the second value is a value less than or equal to the first value.

The decision unit 514 decides whether or not to permit charging and discharging of the electric vehicle 40 connected to the charging and discharging device 30 connected to the connector 21. The decision unit 514 can control the relays 25. The decision unit 514 turns on the relays 25 corresponding to the electric vehicle 40 for which charging and discharging is permitted, and turns off the relays 25 corresponding to the electric vehicle 40 for which charging and discharging is not permitted. For example, the relays 25 are normally in the off state, and when charging and discharging of the electric vehicle 40 is permitted, the corresponding relays 25 are shifted from the off state to the on state.

For example, at least one of the ID and SOC acquired by the acquisition unit 513 may be displayed on the display device 505. The administrator may refer to the ID or SOC to determine whether or not the electric vehicle 40 can be charged or discharged, and input the determination result into the charge/discharge management device 50. The determining unit 514 performs on/off control of the relay 25 according to the input determination result.

In another example, the determining unit 514 may determine whether the electric vehicle 40 can be charged or discharged based on at least one of the ID and SOC acquired by the acquiring unit 513. For example, if the ID acquired by the acquisition unit 513 matches an ID registered in advance, the determination unit 514 allows charging and discharging of the electric vehicle 40 (turns on the relay 25), and the ID acquired by the acquisition unit 513 If the registered ID does not match the pre-registered ID, charging and discharging of the electric vehicle 40 is not permitted (the relay 25 is turned off).

The selection unit 515 selects the charge/discharge type of the electric vehicle 40 for which charging and discharging is permitted, and the selection unit 515 does not need to select the charge/discharge type for the electric vehicle 40 for which charging and discharging is not permitted.

The charge/discharge management device 50 may manage charge/discharge of the electric vehicle 40 using a management table. The management table is stored in the nonvolatile memory 502, for example.

FIG. 7 is a diagram showing an example of a management table in normal mode. For example, the management table 520 may include parking space no. , vehicle ID, SOC, selection type, and amount of charge/discharge can be stored in association with each other. Parking space no. is a number assigned to each parking space within the parking facility 11.

In the normal mode, the management table 520 shows the parking space number where the charging/discharging device 30 is connected to the connector 21. The ID and SOC acquired by the acquisition unit 513 are stored in association with. In the normal mode, all of the electric vehicles 40 connected to the connector 21 via the charging/discharging device 30 are to be charged. Therefore, the selection unit 515 does not need to select the charge/discharge type. In the normal mode, the selection type field in the management table 520 does not need to be used. However, the selection unit 515 may select “charging” as the charging/discharging type of all electric vehicles 40 in the normal mode, and “charging” may be stored in the selection type field of the management table 520.

The current charge amount or discharge amount measured by the wattmeter 24 is stored in the charge amount/discharge amount field. In the charge amount/discharge amount field, the charge amount or discharge amount is updated periodically, for example.

In the example of FIG. 7, parking space no. An electric vehicle 40 with an ID “111111” is connected to the connector 21 of No. 1 via a charging/discharging device 30, and the amount of charge to the electric vehicle 40 is 20 kWh. Parking space no. An electric vehicle 40 with ID “333333” is connected to the connector 21 of No. 3 via the charging/discharging device 30, and the amount of charge to the electric vehicle 40 is 5 kWh. Parking space no. An electric vehicle 40 with ID "444444" is connected to the connector 21 of No. 4 via the charging/discharging device 30, and the amount of charge to the electric vehicle 40 is 35 kWh.

Returning to FIG. 6, in the emergency mode, the control unit 511 controls a plurality of electric vehicles 40 to be charged based on the SOC of the on-vehicle batteries 401 of some electric vehicles 40 among the plurality of electric vehicles 40 to be charged. The amount of charge to the on-vehicle battery 401 of some of the other electric vehicles 40 can be determined.

For example, in the emergency mode, the control unit 511 may set the SOC of the on-vehicle batteries 401 of some of the electric vehicles 40 among the plurality of electric vehicles 40 to be charged to the SOC of the on-vehicle batteries 401 of some of the electric vehicles 40 to be charged. The amount of charge to the on-vehicle batteries 401 of some of the other electric vehicles 40 can be determined so that the SOCs of the on-vehicle batteries 401 of some of the electric vehicles 40 match. Specifically, the control unit 511 sets the SOC of the on-vehicle battery 401 of the electric vehicle 40 with the smallest SOC among the electric vehicles 40 for which "charging" is selected as the charge/discharge type to the electric vehicle with the second smallest SOC. The amount of charge of the on-board battery 401 of the electric vehicle 40 with the smallest SOC is determined so as to match the SOC of the on-board battery 401 of the electric vehicle 40.

Figure 8 is a diagram showing an example of a management table in emergency mode. In the example of Figure 8, an electric vehicle 40 with ID "222222" is connected to the connector 21 of parking space No. 1 via the charging/discharging device 30. An electric vehicle 40 with ID "555555" is connected to the connector 21 of parking space No. 2 via the charging/discharging device 30. An electric vehicle 40 with ID "666666" is connected to the connector 21 of parking space No. 3 via the charging/discharging device 30. An electric vehicle 40 with ID "777777" is connected to the connector 21 of parking space No. 4 via the charging/discharging device 30.

In the example of FIG. 8, the SOC of the electric vehicle 40 with ID "222222" is 30%. The SOC of the electric vehicle 40 with ID "555555" is 80%. The SOC of the electric vehicle 40 with ID "666666" is 40%. The SOC of the electric vehicle 40 with ID "777777" is 60%. In the example of FIG. 8, the first value is 55% and the second value is 45%. Therefore, the charge/discharge type of the electric vehicle 40 with ID "555555" and the electric vehicle 40 with ID "777777" whose SOC is greater than the first value is selected as "discharge". The charge/discharge type of the electric vehicle 40 with ID "222222" and the electric vehicle 40 with ID "666666" whose SOC is less than the second value is selected as "charge".

In the example of FIG. 8, the SOC of the electric vehicle 40 with ID "222222" is 30%, which is the minimum. The SOC of electric vehicle 40 with ID "666666" is 40%, which is the second smallest. The control unit 511 determines the amount of charge of the electric vehicle 40 with the ID “222222” so that the SOC of the electric vehicle 40 with the ID “222222” matches the SOC of the electric vehicle 40 with the ID “666666”. That is, this charging amount is equivalent to 10% of the SOC of the electric vehicle 40 with ID "222222".

The control unit 511 sets the SOC of the on-board batteries 401 of some of the electric vehicles 40 to be charged to the SOC of the on-vehicle batteries 401 of some of the electric vehicles 40 to be charged. After the SOCs of the in-vehicle batteries 401 match, the charging/discharging devices 30 connected to some of the electric vehicles 40 and the charging/discharging devices 30 connected to 40 of some of the other electric vehicles are controlled, The on-vehicle batteries 401 of some of the electric vehicles 40 described above and the on-vehicle batteries 401 of some of the other electric vehicles 40 can be charged at the same time. More specifically, the amount of charge per unit time of the on-vehicle batteries 401 of the plurality of electric vehicles 40 to be charged may be the same. In the example of FIG. 8, after the SOC of the electric vehicle 40 with ID "222222" reaches 40%, the control unit 511 connects the charging/discharging device 30 connected to the electric vehicle 40 with ID "222222" and the electric vehicle 40 with ID "666666". '', and simultaneously charges the on-vehicle battery 401 of the electric vehicle 40 with ID "222222" and the on-vehicle battery 401 of the electric vehicle 40 with ID "666666". This allows the on-vehicle batteries 401 of the plurality of electric vehicles 40 to be charged fairly during a power outage when power waste should be suppressed.

In another example, the control unit 511 may charge the on-vehicle batteries 401 of a plurality of electric vehicles 40 to be charged simultaneously in the emergency mode. More specifically, the amount of charge per unit time of the on-vehicle batteries 401 of the plurality of electric vehicles 40 to be charged may be the same.

In the example of FIG. 8, the control unit 511 controls the charging/discharging device 30 connected to the electric vehicle 40 with ID "222222" and the charging/discharging device 30 connected to the electric vehicle 40 with ID "666666", and can simultaneously charge the on-board battery 401 of the electric vehicle 40 with ID "222222" and the on-board battery 401 of the electric vehicle 40 with ID "666666".

For example, in the emergency mode, the control unit 511 may control the SOC of the on-vehicle batteries 401 of some of the electric vehicles 40 of the plurality of electric vehicles 40 used as power sources to The amount of discharge of the on-vehicle batteries 401 of some of the other electric vehicles 40 may be determined so that the SOCs of the on-vehicle batteries 401 of some of the other electric vehicles 40 of the cars 40 match. Specifically, the control unit 511 sets the SOC of the on-vehicle battery 401 of the electric vehicle 40 with the highest SOC among the electric vehicles 40 for which "discharge" has been selected as the charge/discharge type to the electric vehicle with the second highest SOC. The amount of discharge of the on-vehicle battery 401 of the electric vehicle 40 with the largest SOC can be determined so as to match the SOC of the on-board battery 401 of the electric vehicle 40.

In the example of FIG. 8, the SOC of the electric vehicle 40 with ID "555555" is 80%, which is the maximum. The SOC of electric vehicle 40 with ID "777777" is 60%, which is the second highest. The control unit 511 determines the amount of discharge of the electric vehicle 40 with the ID "555555" so that the SOC of the electric vehicle 40 with the ID "555555" matches the SOC of the electric vehicle 40 with the ID "777777". In other words, this discharge amount is equivalent to 20% of the SOC of the electric vehicle 40 with ID "555555".

The control unit 511 sets the SOC of the on-vehicle battery 401 of some of the electric vehicles 40 used as a power source to the SOC of the on-vehicle battery 401 of some of the electric vehicles 40 used as a power source. After the SOCs of the onboard batteries 401 of the electric vehicles 40 match, the charging/discharging devices 30 connected to some of the electric vehicles 40 and the charging/discharging devices 30 connected to the 40 of some of the other electric vehicles The on-vehicle batteries 401 of some of the electric vehicles 40 described above and the on-vehicle batteries 401 of some of the other electric vehicles 40 can be discharged simultaneously. More specifically, the amount of discharge per unit time of the on-vehicle batteries 401 of the plurality of electric vehicles 40 used as power sources may be the same. In the example of FIG. 8, after the SOC of the electric vehicle 40 with ID "555555" reaches 80%, the control unit 511 connects the charging/discharging device 30 connected to the electric vehicle 40 with ID "555555" and the electric vehicle 40 with ID "777777". '', and simultaneously discharges the on-vehicle battery 401 of the electric vehicle 40 with ID "555555" and the on-vehicle battery 401 of the electric vehicle 40 with ID "777777." Thereby, the on-vehicle batteries 401 of the plurality of electric vehicles 40 can be discharged fairly.

In another example, the control unit 511 may simultaneously discharge the on-vehicle batteries 401 of the plurality of electric vehicles 40 used as power sources in the emergency mode. More specifically, the amount of discharge per unit time of the on-vehicle batteries 401 of the plurality of electric vehicles 40 used as power sources may be the same.

In the example of FIG. 8, the control unit 511 controls the charging/discharging device 30 connected to the electric vehicle 40 with ID “555555” and the charging/discharging device 30 connected to the electric vehicle 40 with ID “777777”, The on-vehicle battery 401 of the electric vehicle 40 with ID "555555" and the on-vehicle battery 401 of the electric vehicle 40 with ID "777777" can be discharged simultaneously.

Returning to FIG. 6, when the ID acquired by the acquisition unit 513 matches a predetermined specific ID (specific identification information), the selection unit 515 selects the electric vehicle 40 corresponding to the ID as the power source, i.e. , the charging/discharging type of the electric vehicle 40 corresponding to the ID can be selected as "discharge".

Figure 9 is a diagram showing another example of the management table in emergency mode. In the example of Figure 9, an electric vehicle 40 with ID "222222" is connected to the connector 21 of parking space No. 1 via the charging/discharging device 30. An electric vehicle 40 with ID "E18888" is connected to the connector 21 of parking space No. 2 via the charging/discharging device 30. An electric vehicle 40 with ID "666666" is connected to the connector 21 of parking space No. 3 via the charging/discharging device 30. An electric vehicle 40 with ID "777777" is connected to the connector 21 of parking space No. 4 via the charging/discharging device 30.

In the example of FIG. 9, the ID whose first two digits are "E1" is a specific ID. The specific ID is stored in advance in the nonvolatile memory 502, for example. For example, an ID whose first two digits are "E1" is assigned to a public vehicle. Public vehicles are vehicles (electric vehicles) operated by national or local governments, administrative agencies, public organizations, etc. In the example of FIG. 9, the charge/discharge type of the electric vehicle 40 whose ID is "E18888" is selected as "discharge". As a result, in the event of a power outage, the power source for the parking facility 11 can be secured by dispatching public vehicles to the parking facility 11, which is an evacuation site.

For example, the control unit 511 preferentially uses the electric vehicle 40 (public vehicle) given the specific ID as a power source. In a specific example, when a public vehicle is connected to the charging/discharging system 10, the selection unit 515 selects "discharging" as the charging/discharging type of the public vehicle, and selects "discharge" as the charging/discharging type of the public vehicle, and selects "discharge" for the public vehicle other than the public vehicle connected to the charging/discharging system 10. The charging/discharging type of the electric vehicle 40 is selected as "charging" regardless of the SOC. In the example of FIG. 9, the charging/discharging type of each electric vehicle 40 with IDs "222222", "666666", and "777777" is selected as "charging".

In another example, if the SOC of the public vehicle is larger than a certain lower limit value, even if the SOC of the public vehicle is smaller than the SOC of another electric vehicle 40 whose charge/discharge type is "discharge". , the on-board battery 401 of the public vehicle is discharged. In this case, for example, the on-vehicle battery 401 of the electric vehicle 40 other than the public vehicle whose charge/discharge type is selected as "discharge" is not discharged. That is, a plurality of electric vehicles 40 including public vehicles are connected to the charging/discharging system 10 (that is, connected to the connector 21 via the charging/discharging device 30), and the public vehicles and at least one electric vehicle 40 are When the charge/discharge type is selected as "discharge", the control unit 511 may discharge only the on-board battery 401 of the public vehicle.

Returning to FIG. 6, when the ID acquired by the acquisition unit 513 matches a predetermined specific ID, the selection unit 515 selects the electric vehicle 40 corresponding to the ID as the charging target. The charging/discharging type of the corresponding electric vehicle 40 can be selected as "charging".

FIG. 10 is a diagram showing still another example of the management table in the emergency mode. In the example of FIG. 10, parking space No. An electric vehicle 40 with ID “222222” is connected to the connector 21 of No. 1 via the charging/discharging device 30. Parking space no. An electric vehicle 40 with ID "E28888" is connected to the connector 21 of No. 2 via the charging/discharging device 30. Parking space no. An electric vehicle 40 with ID "666666" is connected to the connector 21 of No. 3 via the charging/discharging device 30. Parking space no. An electric vehicle 40 with ID “777777” is connected to the connector 21 of No. 4 via the charging/discharging device 30.

In the example of FIG. 10, an ID whose first two digits are "E2" is a specific ID. The specific ID is, for example, stored in the non-volatile memory 502 in advance. An ID whose first two digits are "E2" is, for example, assigned to an emergency vehicle. Emergency vehicles include ambulances, fire engines, and police vehicles. Emergency vehicles may also include vehicles from gas companies, electric power companies, and blood transfusion vehicles. In the example of FIG. 10, the charge/discharge type of the electric vehicle 40 whose ID is "E28888" is selected as "charging." This allows the on-board battery of the emergency vehicle to be charged in the parking facility 11 where a power source is secured during a power outage. This allows an emergency vehicle to be dispatched to the location of the emergency during a power outage.

For example, the control unit 511 preferentially charges an electric vehicle 40 (emergency vehicle) that has been assigned a specific ID. In a specific example, when an emergency vehicle is connected to the charging/discharging system 10, the selection unit 515 selects the charge/discharge type of the emergency vehicle to "charging". For example, even if an emergency vehicle is connected to the charging/discharging system 10, when the SOC of an electric vehicle 40 other than the emergency vehicle connected to the charging/discharging system 10 is smaller than a second value, the selection unit 515 can select the charge/discharge type of the electric vehicle 40 to "charging". In the example of FIG. 10, the charge/discharge type of each of the electric vehicles 40 with IDs "222222" and "666666" that have SOCs smaller than 45% is selected to be "charging".

In another example, the selection unit 515 may select "discharge" as the charge/discharge type of the electric vehicle 40 other than the emergency vehicle connected to the charge/discharge system 10.

If the SOC of the public vehicle is smaller than a certain upper limit value, the control unit 511 controls whether the emergency vehicle's SOC is higher than the SOC of other electric vehicles 40 whose charging/discharging type is "charging". Charge the battery 401. In this case, for example, the on-vehicle battery 401 of the electric vehicle 40 other than the emergency vehicle whose charge/discharge type is selected as "charge" is not charged. That is, a plurality of electric vehicles 40 including an emergency vehicle are connected to the charging/discharging system 10 (that is, connected to the connector 21 via the charging/discharging device 30), and the emergency vehicle and at least one electric vehicle 40 are When the charging/discharging type is selected as "charging", the control unit 511 may charge only the on-vehicle battery 401 of the emergency vehicle.

[5. Operation of charging/discharging system]
The operation of the charging/discharging system 10 according to the embodiment will be described below.

The charge/discharge management device 50 executes the following mode setting process, first management process, and second management process by executing the charge/discharge management program 507.

FIG. 11 is a flowchart illustrating an example of mode setting processing by the charge/discharge management device according to the embodiment.

When the power supply from the system power supply 90 is not stopped, i.e., when there is no power outage, the charge/discharge management device 50 operates in the normal mode. The processor 501 determines whether or not to change the operation mode from the normal mode to the emergency mode (step S101). When the power supply from the system power supply 90 is stopped and a power outage occurs, for example, the administrator operates the charge/discharge management device 50 and instructs the charge/discharge management device 50 to change the operation mode from the normal mode to the emergency mode. When such an instruction is received (YES in step S101), the processor 501 changes the operation mode from the normal mode to the emergency mode (step S102). When no instruction from the administrator is received (NO in step S101), the processor 501 maintains the operation mode in the normal mode.

In the normal mode, the charge/discharge management device 50 executes the first management process. FIG. 12 is a flowchart illustrating an example of the first management process of the charge/discharge management device according to the embodiment.

During a non-power outage, the driver (user) drives the electric vehicle 40 with the parking facility 11 as the destination. When the electric vehicle 40 arrives at the parking facility 11, the driver parks the electric vehicle 40 in the parking space, connects the plug 31 of the charging/discharging device 30 owned by the driver to the connector 21, and connects the plug 32 to the inlet. Connect to 403.

When the plug 32 is connected to the inlet 403, the control circuit 302 of the charging/discharging device 30 starts communication with the on-vehicle control device 402 of the electric vehicle 40. The in-vehicle control device 402 transmits the ID of the electric vehicle 40 and the SOC of the in-vehicle battery 401, and the control circuit 302 receives the transmitted ID and SOC. The control circuit 302 starts wireless communication with the charge/discharge management device 50 and transmits the received ID and SOC. The charging/discharging management device 50 receives the ID and SOC transmitted from the charging/discharging device 30 (step S201).

The administrator determines whether or not the electric vehicle 40 parked in the parking space can be connected to the charging/discharging system 10, and when permitting the connection, inputs a connection permission instruction into the charging/discharging management device 50, and rejects the connection. If so, an instruction to reject the connection is input to the charge/discharge management device 50. The processor 501 receives an instruction to allow or deny connection (permit or deny) input from the administrator (step S202).

If an instruction to refuse connection is received from the administrator (NO in step S203), the first management procedure ends.

When receiving an instruction for permission to connect from the administrator (YES in step S203), the processor 501 turns on the relay 25 corresponding to the connector 21 to which the charging/discharging device 30 is connected, and starts charging the charging/discharging device 30. An instruction is transmitted (step S204).

Upon receiving the charging start instruction, the control circuit 302 of the charging/discharging device 30 controls the power conversion circuit 301 to charge the vehicle battery 401. The on-vehicle battery 401 is charged by the power supplied from the system power supply 90.

The wattmeter 24 connected to the charge/discharge device 30 periodically measures the amount of charge (power amount) and outputs the measured value of the amount of charge. The charge/discharge management device 50 receives the measured value of the amount of charge from the wattmeter 24 (step S205). The processor 501 stores the received charge amount in, for example, the management table 520 and displays it on the display device 505.

The processor 501 determines whether the charging termination condition is satisfied (step S206). The termination condition is, for example, that the SOC reaches a target value (for example, 100%). The on-vehicle control device 402 of the electric vehicle 40 periodically transmits the current SOC of the on-board battery 401, and the charge/discharge management device 50 receives the SOC via the charge/discharge device 30. Thereby, the charge/discharge management device 50 can acquire the current SOC of the in-vehicle battery 401.

If the charging termination condition is not satisfied (NO in step S206), the processor 501 returns to step S205.

If the charging termination condition is satisfied (YES in step S206), the processor 501 transmits a charging stop instruction to the charging/discharging device 30 (step S207). When the control circuit 302 of the charging/discharging device 30 receives the charge stop instruction, it stops controlling the power conversion circuit 301 and stops charging the vehicle battery 401.

The processor 501 executes billing processing for charging the in-vehicle battery 401 (step S208). The user is charged an amount according to the amount of charging or the charging time. With this, the first management process ends.

In the emergency mode, the charge/discharge management device 50 executes the second management process. FIG. 13 is a flowchart illustrating an example of the second management process of the charge/discharge management device according to the embodiment.

In the event of a power outage, the driver (user) evacuates to the parking facility 11, which is an evacuation site, in the electric vehicle 40. When the electric vehicle 40 arrives at the parking facility 11, the driver parks the electric vehicle 40 in a parking space, then connects the plug 31 of the charging/discharging device 30 owned by the driver to the connector 21, and connects the plug 32 to the inlet 403.

When the plug 32 is connected to the inlet 403, the control circuit 302 of the charging/discharging device 30 starts communication with the on-vehicle control device 402 of the electric vehicle 40. The in-vehicle control device 402 transmits the ID of the electric vehicle 40 and the SOC of the in-vehicle battery 401, and the control circuit 302 receives the transmitted ID and SOC. The control circuit 302 starts wireless communication with the charge/discharge management device 50 and transmits the received ID and SOC. The charging/discharging management device 50 receives the ID and SOC transmitted from the charging/discharging device 30 (step S301).

The administrator determines whether or not the electric vehicle 40 parked in the parking space can be connected to the charging/discharging system 10, and when permitting the connection, inputs a connection permission instruction into the charging/discharging management device 50, and rejects the connection. If so, an instruction to reject the connection is input to the charge/discharge management device 50. The processor 501 receives an instruction to allow or deny connection (permit or deny) input from the administrator (step S302).

If a connection refusal instruction is received from the administrator (NO in step S303), the second management procedure ends.

When receiving a connection permission instruction from the administrator (YES in step S303), the processor 501 turns on the relay 25 corresponding to the connector 21 to which the charging/discharging device 30 is connected. Based on the received ID and SOC, the processor 501 selects the charging/discharging type of the electric vehicle 40 as "charging" or "discharging" (step S304).

When the selected type is "discharge" ("discharge" in step S305), the processor 501 executes the discharge control process (step S306).

FIG. 14 is a flowchart illustrating an example of discharge control processing.

The processor 501 periodically calculates the SOC of the shared battery 70. The processor 501 compares the SOC of the shared battery 70 with a reference value (step S401). If the SOC of the shared battery 70 is equal to or greater than the reference value (YES in step S401), the discharge control process ends. In this case, the charge/discharge management device 50 controls the power conversion device 80 to discharge the shared battery 70. Thereby, the shared battery 70 is used as an emergency power source.

If the SOC of the shared battery 70 is less than the reference value (NO in step S401), the processor 501 sets a target discharge amount of the on-vehicle battery 401 (step S402). The target discharge amount is set based on, for example, the SOC of the vehicle-mounted battery 401. For example, among the plurality of electric vehicles 40 whose charge/discharge type is selected as "discharge", the target discharge amount of the electric vehicle 40 whose on-board battery 401 has the highest SOC is the SOC of the electric vehicle 40 and the SOC. The discharge amount is set to correspond to the difference from the SOC of the second largest electric vehicle 40. As another example, the target discharge amount may be a constant value.

The processor 501 determines whether the discharge start condition is satisfied (step S403). In the charge/discharge management device 50, various discharge rules can be set, for example. For example, a rule may be set to discharge the on-vehicle battery 401 of the electric vehicle 40 with the highest SOC among the electric vehicles 40 whose charge/discharge type is selected as "discharge". As another example, a rule may be set in which the on-vehicle batteries 401 of electric vehicles 40 whose charge/discharge type is selected as "discharge" are simultaneously discharged. Furthermore, if an electric vehicle 40 (public vehicle) to which a specific ID is assigned is included in the electric vehicle 40 whose charging/discharging type is selected as "discharge", a rule is set to discharge the in-vehicle battery 401 of the public vehicle. may be done. The discharge start conditions are set based on such discharge rules.

If the discharge start condition is not satisfied (NO in step S403), the processor 501 returns to step S402.

If the discharge start condition is satisfied (YES in step S403), the processor 501 transmits a discharge start instruction to the charging/discharging device 30 (step S404).

Upon receiving the discharge start instruction, the control circuit 302 of the charging/discharging device 30 controls the power conversion circuit 301 to discharge the vehicle battery 401. Thereby, the vehicle battery 401 is used as a power source.

The wattmeter 24 connected to the charging/discharging device 30 periodically measures the amount of discharge (power amount) and outputs the measured value of the amount of discharge. The charge/discharge management device 50 receives the measured value of the amount of discharge from the wattmeter 24 (step S405).

The processor 501 determines whether the measured value of the discharge amount has reached the target discharge amount (step S406).

If the measured value of the discharge amount has not reached the target discharge amount (NO in step S406), the processor 501 returns to step S405.

If the measured value of the discharge amount has reached the target discharge amount (YES in step S406), the processor 501 transmits a discharge stop instruction to the charging/discharging device 30 (step S407). Upon receiving the discharge stop instruction, the control circuit 302 of the charge/discharge device 30 stops controlling the power conversion circuit 301 and stops discharging the vehicle battery 401. With this, the discharge control process ends.

Returning to FIG. 13, when the discharge control process ends, the second management process ends.

When the selected type is "charging" ("charging" in step S305), the processor 501 executes charging control processing (step S307).

FIG. 15 is a flowchart illustrating an example of charging control processing.

The processor 501 sets a target charging amount (step S501). The target charge amount is set, for example, based on the SOC of the vehicle-mounted battery 401. For example, among the plurality of electric vehicles 40 whose charge/discharge type is selected as "charge", the target charge amount of the electric vehicle 40 whose on-board battery 401 has the smallest SOC is the SOC of the electric vehicle 40 and the SOC. The amount of charge is set to correspond to the difference from the SOC of the second smallest electric vehicle 40. As another example, the target charge amount may be a constant value.

The processor 501 determines whether the charging start condition is satisfied (step S502). For example, various charging rules can be set in the charging/discharging management device 50. For example, a rule may be set to charge the on-vehicle battery 401 of the electric vehicle 40 with the smallest SOC among the electric vehicles 40 whose charge/discharge type is selected as "charge". As another example, a rule may be set that the on-vehicle batteries 401 of electric vehicles 40 whose charge/discharge type is selected as "charge" are simultaneously charged. Furthermore, if the electric vehicle 40 whose charging/discharging type is selected as "discharge" includes an electric vehicle 40 (emergency vehicle) to which a specific ID is assigned, a rule is set that the on-board battery 401 of the emergency vehicle is charged. may be done. Charging start conditions are set based on such charging rules.

If the charging start condition is not satisfied (NO in step S502), the processor 501 returns to step S501.

If the charging start condition is satisfied (YES in step S502), the processor 501 transmits a charging start instruction to the charging/discharging device 30 (step S503).

Upon receiving the charging start instruction, the control circuit 302 of the charging/discharging device 30 controls the power conversion circuit 301 to charge the vehicle battery 401. Thereby, in the event of a power outage, the on-vehicle battery 401 of the electric vehicle can be charged using the emergency power source (the shared battery 70 or the on-vehicle battery 401 of the electric vehicle 40).

The wattmeter 24 connected to the charge/discharge device 30 periodically measures the amount of charge (power amount) and outputs the measured value of the amount of charge. The charge/discharge management device 50 receives the measured value of the amount of charge from the wattmeter 24 (step S504).

The processor 501 determines whether the measured value of the charge amount has reached the target charge amount (step S505).

If the measured value of the charge amount has not reached the target charge amount (NO in step S505), the processor 501 returns to step S504.

If the measured value of the charge amount has reached the target charge amount (YES in step S505), the processor 501 transmits a charging stop instruction to the charging/discharging device 30 (step S506). Upon receiving the charging stop instruction, the control circuit 302 of the charging/discharging device 30 stops controlling the power conversion circuit 301 and stops charging the vehicle battery 401.

The processor 501 determines whether the termination conditions for terminating the charging control process are satisfied (step S507). For example, when the shared battery 70 is used as a power source, the termination condition is that the SOC reaches a target value (for example, 100%). For example, when the on-vehicle battery 401 of another electric vehicle 40 is used as the power source, the termination condition is that the SOC of the electric vehicle 40 to be charged matches the SOC of the electric vehicle 40 that is the power source.

If the termination condition is not satisfied (NO in step S507), the processor 501 returns to step S501.

If the termination condition is satisfied (YES in step S507), the charging control process ends.

Returning to FIG. 13, when the charging control process ends, the second management process ends.

[6. Addendum]
The embodiments disclosed this time are illustrative in all respects and are not restrictive. The scope of rights of the present invention is indicated by the scope of the claims rather than the above-described embodiments, and includes meanings equivalent to the scope of the claims and all changes within the scope thereof.

10 Charging and discharging system 11 Parking facility 12 Management room 20 Electrical wiring 21 Connector 22 Distribution board 23 Power line 24 Wattmeter 25 Relay 30 Charging and discharging device 301 Power conversion circuit 302 Control circuit 303 Communication interface (communication I/F)
304 Wireless communication interface (wireless communication I/F)
311, 312, 313 Bidirectional AC/DC converter 314

Transformer

31, 32 Plug 40 Electric vehicle 401 On-board battery 402 On-board control device 403 Inlet 50 Charge/discharge management device 501 Processor 502 Non-volatile memory 503 Volatile memory 504 Input device 505 Display Device 506 Communication interface (communication I/F)
507 Charge/discharge management program 511 Control unit 512 Setting unit 513 Acquisition unit 514 Determination unit 515 Selection unit 520 Management table 51 Wireless communication device 60 Solar power generation device 70 Common battery 80 Power conversion device 81 Step-up DC/DC converter 82 Bidirectional AC /DC converter 83 Bidirectional DC/DC converter 85 Power line 90 System power supply

Claims

electrical wiring located in the parking facility and connected to the grid power;
one or more connectors provided at the ends of the electrical wiring and connected to a charging/discharging device for charging and discharging an onboard battery of an electric vehicle;
a charging and discharging management device that controls the charging and discharging device connected to the connector and manages charging and discharging of the in-vehicle battery through the electrical wiring;
Equipped with
The charge/discharge management device causes the charge/discharge device to supply power discharged from the on-board battery to the electrical wiring when power supply from the system power source is stopped.
charging/discharging system.
The charge/discharge management device includes:
When the power supply from the grid power supply is not stopped, the charging/discharging device operates in a normal mode in which the in-vehicle battery is charged with the power supplied from the grid power supply,
operating in an emergency mode that causes the charging/discharging device to discharge the vehicle battery when power supply from the grid power supply is stopped;
The charging/discharging system according to claim 1.
In the emergency mode, the charge/discharge management device includes a first charge/discharge device connected to a first connector provided at a first end of the electrical wiring; A first on-vehicle battery of the vehicle is discharged, and a second battery of the second vehicle connected to the second charging/discharging device is connected to a second charging/discharging device connected to a second connector provided at a second end of the electric wiring. 2 Charge the car battery,
The charging/discharging system according to claim 2.
In the emergency mode, the charging/discharging management device selects as a power source a vehicle connected to a charging/discharging device connected to some of the plurality of connectors, and selects as a power source a vehicle connected to a charging/discharging device connected to some of the plurality of connectors. Selecting a vehicle connected to a charging/discharging device connected to the unit as a charging target,
The charging/discharging system according to claim 2.
The charge/discharge management device acquires remaining power amount information indicating the remaining power amount of the in-vehicle batteries of the plurality of vehicles connected to the plurality of charging/discharging devices connected to the plurality of connectors, and the acquired remaining power amount. Selecting a portion of the plurality of vehicles as a power source and selecting another portion of the plurality of vehicles as a charging target based on the amount information;
The charging/discharging system according to claim 4.
The charge/discharge management device selects as a power source a vehicle in which the remaining power amount of the in-vehicle battery is larger than a first value, and selects as a charging target a vehicle in which the remaining power amount in the in-vehicle battery is smaller than a second value that is less than or equal to the first value. select as,
The charging/discharging system according to claim 5.
The charging/discharging management device is configured to charge/discharge the charge/discharge management device based on the remaining power amount of the on-vehicle batteries of some of the vehicles selected as the charging target. determines the amount of charge to the on-board battery of some vehicles,
The charging/discharging system according to claim 5 or claim 6.
The charge/discharge management device acquires identification information of a plurality of vehicles connected to a plurality of charge/discharge devices connected to the plurality of connectors, and selects a vehicle whose identification information matches specific identification information as a power source. ,
The charging/discharging system according to any one of claims 4 to 7.
The charging/discharging management device acquires identification information of a plurality of vehicles connected to a plurality of charging/discharging devices connected to the plurality of connectors, and selects a vehicle whose identification information matches specific identification information as a charging target. do,
The charging/discharging system according to any one of claims 4 to 7.
The charging/discharging system includes:
a shared battery located in the parking facility;
a power conversion device that converts power output from the shared battery and outputs the converted power to the electrical wiring;
Furthermore,
The charge/discharge management device includes:
In the emergency mode, when the remaining power amount of the common battery is equal to or higher than a reference value, causing the power conversion device to supply the electric power discharged from the common battery to the electrical wiring,
In the emergency mode, if the remaining power amount of the shared battery is less than the reference value, causing the charging/discharging device to supply the electric power discharged from the on-board battery to the electrical wiring;
The charging/discharging system according to any one of claims 2 to 9.
The charging/discharging system includes a charging/discharging device connected to the connector.
The charging/discharging system according to any one of claims 1 to 10.
A charging and discharging management device that manages charging and discharging of a vehicle battery through electrical wiring arranged in a parking facility and connected to a grid power supply,
comprising a control unit that controls a charging and discharging device for charging and discharging an on-board battery of an electric vehicle, which is connected to one or more connectors provided at the end of the electric wiring,
The control unit causes the charging/discharging device to supply the electric power discharged from the in-vehicle battery to the electric wiring when power supply from the grid power source is stopped.
Charge/discharge management device.
A charging/discharging management method for managing charging/discharging of a vehicle battery through electrical wiring arranged in a parking facility and connected to a grid power source, the method comprising:
a step of controlling a charging/discharging device connected to one or more connectors provided at the end of the electric wiring for charging/discharging an onboard battery of an electric vehicle;
In the controlling step, when power supply from the system power source is stopped, causing the charging/discharging device to supply the electric power discharged from the on-board battery to the electric wiring.
Charge/discharge management method.
A charging and discharging management program used by a charging and discharging management device that manages charging and discharging of a vehicle battery through electrical wiring arranged in a parking facility and connected to a grid power source, the program comprising:
causing the computer to execute the step of controlling a charging/discharging device connected to one or more connectors provided at the end of the electric wiring for charging/discharging the on-board battery of the electric vehicle;
In the controlling step, when the power supply from the grid power supply is stopped, the charging and discharging device causes the computer to supply the electric power discharged from the on-vehicle battery to the electric wiring. control the
Charge/discharge management program.