Charging device, and control method for charging device

Abstract

To provide a charging device capable of appropriately performing a system interconnection.SOLUTION: A charging device comprises a communication section, a battery, a terminal, a bidirectional charger, and a controller. The communication section receives interconnection information from a charging facility. A power system is connected to the charging facility. The interconnection information relates to technical requirements for interconnection with the power system. The battery is capable of storing power. The terminal is connectable to the charging facility. The bidirectional charger is connected between the terminal and the battery. The bidirectional charger is capable of converting AC power and DC power bidirectionally. The controller acquires a parameter in accordance with the received interconnection information. The controller controls a discharge operation of the bidirectional charger toward the terminal using the acquired parameter.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a charging device and a control method for the charging device. [Background technology]

[0002] When a charging device equipped with a battery is connected to a charging facility that is connected to a grid, the charging device is able to store power in the battery by charging the battery with power from the charging facility. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-530858 A Summary of the Invention [Problem to be solved by the invention]

[0004] When a charging device equipped with a battery is connected to a charging facility connected to a grid, the charging device can discharge the power stored in the battery to the charging facility to interconnect with the grid. At this time, it is desirable for the charging device to interconnect with the grid appropriately.

[0005] The present disclosure provides a charging device capable of appropriately connecting to a grid, and a method for controlling the charging device. [Means for solving the problem]

[0006] The charging device according to the present disclosure includes a communication unit, a battery, a terminal, a bidirectional charger, and a controller. The communication unit receives grid connection information from a charging facility. The charging facility is connected to a grid. The grid connection information relates to technical requirements for grid connection. The battery is capable of storing power. The terminal is capable of connecting to the charging facility. The bidirectional charger is connected between the terminal and the battery. The bidirectional charger is capable of bidirectionally converting AC power and DC power. The controller acquires parameters according to the received grid connection information. The controller uses the acquired parameters to control the discharge operation to the terminal side of the bidirectional charger. Effect of the Invention

[0007] According to the charging device according to the present disclosure, it is possible to appropriately perform grid connection. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram showing charging and discharging at a destination of a vehicle equipped with a charging device according to an embodiment. [Diagram 2] FIG. 1 is a diagram showing a configuration of a charging device according to an embodiment. [Diagram 3] FIG. 2 is a diagram showing the configuration of a controller according to the embodiment. [Figure 4] FIG. 4 is a diagram showing parameters for interconnecting with the grid in area A according to the embodiment. [Diagram 5] FIG. 4 is a diagram showing parameters for interconnecting with a system in area B in the embodiment. [Figure 6] 4 is a flowchart showing the operation of the charging device according to the embodiment. [Figure 7] 4 is a sequence chart showing a use case of the charging device according to the embodiment. [Figure 8] FIG. 11 is a diagram showing charging and discharging at a destination of a vehicle equipped with a charging device according to a first modified example of an embodiment. [Figure 9] FIG. 4 is a diagram showing the configuration of a charging device according to a first modified example of an embodiment. [Figure 10] FIG. 11 is a diagram showing charging and discharging at a destination of a vehicle equipped with a charging device according to a second modified example of the embodiment. [Figure 11] FIG. 13 is a diagram showing the configuration of a charging device according to a second modified example of an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a charging device according to the present disclosure will be described with reference to the drawings.

[0010] (Embodiment) The charging device of the embodiment is equipped with a battery, and when connected to charging equipment connected to a grid, the battery can be discharged to the charging equipment to connect to the grid, thereby enabling the device to be connected to the grid. However, the device is designed to ensure proper connection to the grid.

[0011] The charging device 1 may be mounted on a vehicle 100 as shown in FIG. 1. FIG. 1 is a diagram showing charging and discharging at a destination of the vehicle 100 mounted with the charging device 1. The vehicle 100 is any mobile body that is chargeable and has wheels. The vehicle 100 may be, for example, an EV (Electric Vehicle) type mobile body or a PHV (Plug-in Hybrid Vehicle) type mobile body. The vehicle 100 may be a two-wheeled vehicle, a three-wheeled vehicle, a four-wheeled vehicle, or a mobile body having five or more wheels. The following description will be mainly focused on the case where the vehicle 100 is an EV type four-wheeled vehicle.

[0012] As a charging infrastructure for the vehicle 100 equipped with the charging device 1, a plurality of charging stations exist in a plurality of regions, and a charging facility 300 is provided at each charging station.

[0013] For example, as shown in FIG. 1(a), when the destination of the vehicle 100 is region A, the vehicle 100 can charge the battery mounted in the charging device 1 by connecting the charging device 1 to a charging facility 300a at a charging station in region A. The charging facility 300a is connected to a system 400a in region A via a power distribution network, and is connected to a server 600a in region A via a communication line 500a. The communication line 500a may be a wired communication line and / or a wireless communication line. The system 400a and the server 600a in region A are each managed by the power transmission and distribution business operator in region A.

[0014] When the charging device 1 is connected to the charging facility 300a to which the grid 400a is connected, the charging device 1 can be interconnected with the grid 400a in area A by discharging the power stored in the battery to the charging facility 300a.

[0015] As shown in FIG. 1(b), when the destination of the vehicle 100 is region B, the vehicle 100 can charge the battery mounted in the charging device 1 by connecting the charging device 1 to a charging facility 300b at a charging station in region B. The charging facility 300b is connected to a system 400b in region B via a power distribution network, and is connected to a server 600b in region B via a communication line 500b. The communication line 500b may be a wired communication line and / or a wireless communication line. The system 400b and the server 600b in region B are each managed by the power transmission and distribution business operator in region B.

[0016] When the charging device 1 is connected to the charging facility 300b to which the grid 400b is connected, the charging device 1 can be interconnected with the grid 400b in area B by discharging the power stored in the battery to the charging facility 300b.

[0017] Here, the power transmission and distribution company in region A and the power transmission and distribution company in region B may operate the grids 400a and 400b with different technical requirements.

[0018] For example, in order to connect to the grid in each country, it is required to follow the grid code established by that country (in Japan, the grid interconnection regulations). According to the grid code, in addition to connecting using the same electrical method as the grid, it is required to be equipped with protection functions in the event of a grid accident, functions to continue operation for a certain period of time, and functions to prevent isolated operation. Since these functions have different detection thresholds and detection time limits for voltage and frequency for each of the multiple electricity transmission and distribution companies in each country (10 in Japan), when a vehicle moves and connects to the grid of a different electricity transmission and distribution company, it is required to change the functions to a state that conforms to the technical requirements.

[0019] In other words, it is desirable for the charging device 1 to perform grid connection appropriately in accordance with the technical requirements of the area to which the vehicle 100 equipped with the charging device 1 is to move.

[0020] In this embodiment, the charging device 1 receives interconnection information related to technical requirements for interconnection with the grid 400 when connected to the charging facility 300, and updates parameters for discharging to the charging facility 300, thereby enabling grid interconnection according to technical requirements for each region.

[0021] The charging device 1 may be configured as shown in Fig. 2. Fig. 2 is a diagram showing the configuration of the charging device 1.

[0022] The charging device 1 includes a communication unit 2, a battery 3, a terminal 4, a bidirectional charger 5, a grid interconnection relay NCR, a voltage transducer VT, a current transducer CT, a voltage detector VD, a frequency detector FD, and a controller 6.

[0023] The controller 6 comprehensively controls each part of the charging device 1. The controller 6 may be, for example, an ECU (Electronic Control Unit). The controller 6 may functionally include an overvoltage relay OVR, an undervoltage relay UVR, an over-frequency relay OFR, an under-frequency relay UFR, a reverse power relay RPR, and an under-power relay UPR.

[0024] The terminal 4 is disposed in a housing (not shown) of the charging device 1, and at least a portion of it is exposed to the outside. The terminal 4 can be connected to the charging facility 300. The charging facility 300 has a main body 303 connected to the terminal 302 via a cable 301. The terminal 4 corresponds to the terminal 302 of the charging facility 300. The terminal 4 and the terminal 302 may have structures that allow them to fit together. The terminal 4 may have a convex structure, and the terminal 302 may have a corresponding concave structure. When the terminal 302 of the charging facility 300 is an outlet that complies with a predetermined charging standard, the terminal 4 may be an inlet that complies with the predetermined charging standard. The cable 301 includes a power line 3011, and may further include a communication line 3012.

[0025] The charging facility 300 is connected via a power distribution network to a grid 400 in the area to which the vehicle 100 is moving, and is also connected via a communication line 500 to a server 600 in the area to which the vehicle 100 is moving.

[0026] The terminal 4 has a connection detector 41. The connection detector 41 is capable of detecting the connection of the terminal 302. The connection detector 41 may physically detect the connection of the terminal 302, or may electrically detect the connection of the terminal 302. When the connection detector 41 detects the connection of the terminal 302, it supplies a detection signal to the controller 6.

[0027] The communication unit 2 is capable of communicating with the charging equipment 300. The communication unit 2 is electrically connected between the controller 6 and the terminal 4. The communication unit 2 can be communicatively connected to the charging equipment 300 via the terminal 4. When the charging equipment 300 is connected to the terminal 4, the communication unit 2 is capable of transmitting and receiving predetermined information to and from the charging equipment 300 via the terminal 4.

[0028] For example, the charging facility 300 downloads and stores in advance the grid connection information 3031 from the server 600 via the communication line 500. The grid connection information 3031 is information on technical requirements for the grid connection with the grid 400. The grid connection information 3031 may include parameters according to the technical requirements for the grid connection with the grid 400, or may include a communication address (e.g., a URL of the server 600) for acquiring the parameters according to the technical requirements for the grid connection with the grid 400.

[0029] When the charging facility 300 is connected to the terminal 4, the communication unit 2 transmits a grid-connection information request from the communication unit 2 to the charging facility 300 under the control of the controller 6. As a response to the grid-connection information request, the communication unit 2 receives grid-connection information from the charging facility 300 and supplies it to the controller 6. The controller 6 holds grid-connection information 632. The controller 6 acquires parameters according to the grid-connection information 632. When the grid-connection information 632 includes parameters, the controller 6 may acquire the parameters by extracting the parameters from the grid-connection information 632. When the grid-connection information 632 includes a communication address for acquiring the parameters, the controller 6 may access the server 600 via the communication unit 2, the terminal 4, the charging facility 300, and the communication line 500 to acquire the parameters from the server 600. In this way, the controller 6 can control the discharging operation to the terminal 4 side of the bidirectional charger 5 using the acquired parameters.

[0030] The battery 3 can store electric power. The battery 3 may be a power storage component such as an electric double layer capacitor or an electrolytic capacitor, or may be a secondary battery such as a lead storage battery, a lithium ion battery, a nickel metal hydride battery, a nickel cadmium battery, or an all-solid-state battery.

[0031] The bidirectional charger 5 is connected between the terminal 4 and the battery 3. Under the control of a controller 6, the bidirectional charger 5 is capable of converting AC power and DC power in both directions.

[0032] The bidirectional charger 5 can be controlled by the controller 6 to perform a charging operation when the charging equipment 300 is connected to the terminal 4. The bidirectional charger 5 may receive AC power from the charging equipment 300 via the terminal 4, convert the AC power to DC power, and supply the DC power to the battery 3. In this way, the battery 3 can be charged.

[0033] The bidirectional charger 5 can be controlled by the controller 6 to perform a discharging operation when the charging equipment 300 is connected to the terminal 4. The bidirectional charger 5 may receive DC power from the battery 3, convert the DC power to AC power, and supply the AC power to the charging equipment 300 via the terminal 4. This allows the battery 3 to be discharged.

[0034] The grid interconnection relay NCR is inserted into the line LN that connects the terminal 4 and the bidirectional charger 5. One end of the grid interconnection relay NCR is connected to the terminal 4, the other end is connected to the bidirectional charger 5, and a control terminal is connected to the controller 6. The grid interconnection relay NCR is a normally closed relay. The grid interconnection relay NCR is in an on state in a steady state, and electrically connects the terminal 4 and the bidirectional charger 5. This allows the charging device 1 to be interconnected with the grid 400. The grid interconnection relay NCR can be shifted to an off state under the control of the controller 6. The grid interconnection relay NCR is maintained in an off state in response to the control of the controller 6, thereby electrically disconnecting the bidirectional charger 5 from the terminal 4. This stops the connection of the charging device 1 to the grid 400. The grid interconnection relay NCR is released from the off state and returned to an on state in response to the control of the controller 6, thereby electrically connecting the terminal 4 and the bidirectional charger 5 again. This allows the charging device 1 to return to a state in which it can be interconnected with the grid 400.

[0035] The voltage transducer VT is connected between the line LN and the controller 6. The primary side of the voltage transducer VT is connected to the line LN, and the secondary side is connected to the controller 6. The voltage transducer VT transmits the voltage of the line LN to the controller 6. The controller 6 supplies the voltage of the line LN to an overvoltage relay OVR, an undervoltage relay UVR, an over-frequency relay OFR, and an under-frequency relay UFR.

[0036] The overvoltage relay OVR is capable of detecting a physical quantity related to the voltage of the line LN. The overvoltage relay OVR receives the voltage of the line LN via the voltage transducer VT and is capable of detecting an overvoltage of the line LN.

[0037] The overvoltage relay OVR can set parameters PT1 and PT2 according to the grid-connection information 632 by the controller 6, and can detect an overvoltage on the line LN according to the set parameters PT1 and PT2. The parameter PT1 is a parameter related to voltage, and the parameter PT2 is a parameter related to time. The controller 6 may set a voltage threshold value regarded as an overvoltage as parameter PT1 in the overvoltage relay OVR according to the grid-connection information 632, and set a detection time regarded as an occurrence of an overvoltage as parameter PT2 in the overvoltage relay OVR. The overvoltage relay OVR may detect an overvoltage in response to a state in which the voltage of the line LN exceeds the voltage threshold value continuing for a detection time or longer.

[0038] When the overvoltage relay OVR detects an overvoltage on the line LN, it supplies a detection signal to the controller 6. In response to the detection signal from the overvoltage relay OVR, the controller 6 may transition the grid interconnection relay NCR to an OFF state and stop the discharging operation of the bidirectional charger 5.

[0039] The undervoltage relay UVR is capable of detecting a physical quantity related to the voltage of the line LN. The undervoltage relay UVR receives the voltage of the line LN via the voltage transducer VT and is capable of detecting an undervoltage of the line LN.

[0040] The undervoltage relay UVR can set parameters PT3 and PT4 according to the grid connection information 632 by the controller 6, and can detect an undervoltage on the line LN according to the set parameters PT3 and PT4. The parameter PT3 is a parameter related to voltage, and the parameter PT4 is a parameter related to time. The controller 6 may set a voltage threshold value regarded as an undervoltage in the undervoltage relay UVR as parameter PT3 in accordance with the grid connection information 632, and set a detection time regarded as an occurrence of an undervoltage in the undervoltage relay UVR as parameter PT4. The undervoltage relay UVR may detect an undervoltage in response to a state in which the voltage of the line LN falls below the voltage threshold value for a detection time or longer.

[0041] When the undervoltage relay UVR detects an undervoltage on the line LN, it supplies a detection signal to the controller 6. In response to the detection signal from the undervoltage relay UVR, the controller 6 may transition the grid interconnection relay NCR to the off state and stop the discharging operation of the bidirectional charger 5.

[0042] The frequency rise relay OFR is capable of detecting a physical quantity related to the frequency of the line LN. The frequency rise relay OFR receives the voltage of the line LN via the voltage transducer VT and is capable of detecting a frequency rise of the voltage of the line LN.

[0043] The frequency increase relay OFR can set parameters PT5 and PT6 according to the grid connection information 632 by the controller 6, and can detect a frequency increase of the voltage of the line LN according to the set parameters PT5 and PT6. The parameter PT5 is a parameter related to frequency, and the parameter PT6 is a parameter related to time. When the grid 400 is stopped, if the charging device 1 continues to operate independently, the frequency of the voltage supplied to the charging device 1 may increase from an appropriate value. The controller 6 may set a frequency threshold value for determining an isolated operation when the grid 400 is stopped as the parameter PT5 in the frequency increase relay OFR, and set a detection time for determining an isolated operation as the parameter PT6 in the frequency increase relay OFR, according to the grid connection information 632. The frequency increase relay OFR may detect a frequency increase of the voltage of the line LN in response to a state in which the frequency of the voltage of the line LN exceeds the frequency threshold value for a detection time or more.

[0044] When the over-frequency relay OFR detects a frequency rise of the voltage of the line LN, it supplies a detection signal to the controller 6. In response to the detection signal from the over-frequency relay OFR, the controller 6 may transition the grid interconnection relay NCR to the off state and stop the discharging operation of the bidirectional charger 5.

[0045] The under frequency relay UFR is capable of detecting a physical quantity related to the frequency of the line LN. The under frequency relay UFR receives the voltage of the line LN via the voltage transducer VT and is capable of detecting a frequency drop in the voltage of the line LN.

[0046] The under-frequency relay UFR can set parameters PT7 and PT8 according to the grid connection information 632 by the controller 6, and can detect a frequency drop of the voltage of the line LN according to the set parameters PT7 and PT8. The parameter PT7 is a parameter related to frequency, and the parameter PT8 is a parameter related to time. When the grid 400 is stopped, if the charging device 1 continues to operate alone, the frequency of the voltage supplied to the charging device 1 may drop from an appropriate value. The controller 6 may set a frequency threshold value for determining an isolated operation when the grid 400 is stopped as the parameter PT7 in the under-frequency relay UFR according to the grid connection information 632, and set a detection time for determining an isolated operation as the parameter PT8 in the under-frequency relay UFR. The under-frequency relay UFR may detect a frequency drop of the voltage of the line LN according to a state in which the frequency of the voltage of the line LN is below the frequency threshold value for a detection time or more.

[0047] When the under frequency relay UFR detects a frequency drop of the voltage of the line LN, it supplies a detection signal to the controller 6. In response to the detection signal from the under frequency relay UFR, the controller 6 may transition the grid interconnection relay NCR to the off state and stop the discharging operation of the bidirectional charger 5.

[0048] The current transducer CT is disposed between the line LN and the controller 6. The current transducer CT is disposed around the line LN, and one end is connected to the controller 6. The current transducer CT transmits the current of the line LN to the controller 6. The controller 6 supplies the current of the line LN to the reverse power relay RPR and the underpower relay UPR.

[0049] The reverse power relay RPR is capable of detecting a physical quantity related to the power of the line LN. The reverse power relay RPR receives the current of the line LN via the current transducer CT and is capable of detecting the reverse power of the line LN.

[0050] The reverse power relay RPR can set parameters PT9 and PT10 according to the grid connection information 632 by the controller 6, and can detect reverse power of the line LN according to the set parameters PT9 and PT10. The parameter PT9 is a parameter related to power, and the parameter PT10 is a parameter related to time. When the grid 400 is stopped, if the charging device 1 continues to operate independently, there is a possibility that the power supplied to the charging device 1 will be transmitted in the reverse direction. The controller 6 may set a power threshold value regarded as reverse power when the grid 400 is stopped in the reverse power relay RPR as the parameter PT9 in accordance with the grid connection information 632, and set a detection time regarded as reverse power in the reverse power relay RPR as the parameter PT10. The reverse power relay RPR may detect reverse power of the line LN in response to a state in which the reverse power of the line LN exceeds the power threshold value continuing for a detection time or more.

[0051] When the reverse power relay RPR detects reverse power in the line LN, it supplies a detection signal to the controller 6. In response to the detection signal from the reverse power relay RPR, the controller 6 may transition the grid interconnection relay NCR to an OFF state and stop the discharging operation of the bidirectional charger 5.

[0052] The underpower relay UPR is capable of detecting a physical quantity related to the power of the line LN. The underpower relay UPR receives the current of the line LN via the current transducer CT and is capable of detecting an underpower of the line LN.

[0053] The controller 6 can set parameters PT11 and PT12 according to the grid connection information 632 in the power shortage relay UPR, and can detect a power shortage in the line LN according to the set parameters PT11 and PT12. The parameter PT11 is a parameter related to power, and the parameter PT12 is a parameter related to time. The controller 6 may set a power threshold value regarded as a power shortage in the power shortage relay UPR as the parameter PT11 in accordance with the grid connection information 632, and set a detection time regarded as an occurrence of a power shortage in the power shortage relay UPR as the parameter PT12. The power shortage relay UPR may detect a power shortage in response to a state in which the power of the line LN falls below the power threshold value for a detection time or more.

[0054] When the power shortage relay UPR detects a power shortage in the line LN, it supplies a detection signal to the controller 6. In response to the detection signal from the power shortage relay UPR, the controller 6 may transition the grid interconnection relay NCR to an OFF state and stop the discharging operation of the bidirectional charger 5.

[0055] The voltage detector VD has one end connected to the line LN and detects the amplitude of the voltage on the line LN. The voltage detector VD has the other end connected to the controller 6 and supplies the detected voltage amplitude to the controller 6.

[0056] The controller 6 acquires parameters PT13 and PT14 according to the grid connection information 632. The parameter PT13 is a parameter related to voltage, and the parameter PT14 is a parameter related to time. Even if the grid 400 temporarily drops in voltage, the operation of the charging device 1 can be continued as long as the grid 400 does not stop. The controller 6 may acquire an allowable voltage range of the voltage drop of the grid 400 as the parameter PT13, and an allowable time of the voltage drop of the grid 400 as the parameter PT14. The controller 6 may maintain the ON state of the grid connection relay NCR and control the continuation of the discharging operation of the bidirectional charger 5 according to the amplitude of the voltage detected by the voltage detector VD and the parameters PT13 and PT14. The controller 6 may maintain the ON state of the grid connection relay NCR and control the continuation of the discharging operation of the bidirectional charger 5 until the duration of the state in which the amplitude of the voltage detected by the voltage detector VD is out of the allowable voltage range reaches the allowable time.

[0057] The frequency detector FD has one end connected to the line LN and detects the frequency of the voltage on the line LN. The frequency detector FD has the other end connected to the controller 6 and supplies the detected voltage frequency to the controller 6.

[0058] The controller 6 acquires parameters PT15 and PT16 according to the grid connection information 632. The parameter PT15 is a parameter related to frequency, and the parameter PT16 is a parameter related to time. Even if the grid 400 temporarily fluctuates in frequency, the operation of the charging device 1 can be continued as long as the grid 400 is not stopped. The controller 6 may acquire an allowable frequency range of the frequency fluctuation of the grid 400 as the parameter PT15, and an allowable time of the frequency fluctuation of the grid 400 as the parameter PT16. The controller 6 may maintain the on state of the grid connection relay NCR and control the continuation of the discharging operation of the bidirectional charger 5 according to the frequency of the voltage detected by the frequency detector FD and the parameters PT15 and PT16. The controller 6 may maintain the on state of the grid connection relay NCR and control the continuation of the discharging operation of the bidirectional charger 5 until the duration of the state in which the frequency of the voltage detected by the frequency detector FD is out of the allowable frequency range reaches the allowable time.

[0059] Next, the configuration of the controller 6 will be described with reference to Fig. 3. Fig. 3 is a diagram showing the configuration of the controller 6.

[0060] The controller 6 includes a processor 61, a volatile memory 62, a non-volatile memory 63, an interface (I / F) 64, and a bus 65. The processor 61, the volatile memory 62, the non-volatile memory 63, and the interface (I / F) 64 are connected to each other via the bus 65 so as to be able to communicate with each other.

[0061] The interface 64 is connected to the communication unit 2, the battery 3, the terminal 4, the bidirectional charger 5, the grid interconnection relay NCR, the voltage transducer VT, the current transducer CT, the voltage detector VD, and the frequency detector FD.

[0062] The volatile memory 62 may be any memory capable of temporarily storing information, for example, a dynamic random access memory (DRAM).

[0063] The non-volatile memory 63 is a memory capable of storing information in a non-volatile manner, and may be, for example, a flash memory. The non-volatile memory 63 stores a program 631, grid connection information 632, and a parameter group 633 in a non-volatile manner. The program 631 may be firmware for controlling each part of the charging device 1. The grid connection information 632 is information on technical requirements for grid connection with the grid 400. The grid connection information 632 may include a parameter group according to the technical requirements for grid connection with the grid 400, or may include a communication address (for example, a URL of the server 600) for acquiring a parameter group according to the technical requirements for grid connection with the grid 400. The parameter group 633 includes a plurality of parameters, each of which corresponds to the technical requirements for grid connection with the grid 400. The parameter group 633 may include the above-mentioned parameters PT1 to PT16.

[0064] The processor 61 functionally includes a connection detection unit 611, a communication control unit 612, a charging control unit 613, an update unit 614, a discharge control unit 615, an opening / closing control unit 616, an overvoltage relay OVR, an undervoltage relay UVR, an over-frequency relay OFR, an under-frequency relay UFR, a reverse power relay RPR, and an underpower relay UPR. Each unit in the processor 61 may be realized in hardware (for example, as a circuit) in the controller 6, or may be realized in software in the controller 6. Each unit in the processor 61 may be partially realized in hardware and the remaining part may be realized in software. The functions realized in software may be deployed as functional modules in the volatile memory 62 collectively at the time of compilation or sequentially as the processing progresses by the processor 61 executing the program 631. As a result, each unit can be equivalently considered to be realized in software in the processor 61.

[0065] The connection detection unit 611 can detect the connection to the terminal 4 of the charging facility 300 via the connection detector 41. When the connection detector 41 detects the connection of the terminal 302, it supplies a detection signal to the connection detection unit 611. The connection detection unit 611 detects the connection to the terminal 4 of the charging facility 300 in response to the detection signal. The connection detection unit 611 can notify each of the communication control unit 612, the charging control unit 613, and the discharging control unit 615 of the detection of the connection to the terminal 4 of the charging facility 300.

[0066] The communication control unit 612 can control the communication unit 2 in response to detection of a connection to the terminal 4 of the charging facility 300. The communication control unit 612 receives a notification of detection of a connection to the terminal 4 of the charging facility 300 from the connection detection unit 611. In response to the notification of the connection detection, the communication control unit 612 generates a grid-connection information request and supplies it to the communication unit 2. As a result, the communication unit 2 transmits the grid-connection information request from the communication unit 2 to the charging facility 300. When the communication unit 2 receives grid-connection information from the charging facility 300 as a response to the grid-connection information request, the communication control unit 612 receives the grid-connection information from the communication unit 2 and stores it in the non-volatile memory 63 as grid-connection information 632.

[0067] The charging control unit 613 can control the battery 3 and the bidirectional charger 5 in response to detection of the connection to the terminal 4 of the charging facility 300. The charging control unit 613 receives a notification of the detection of the connection to the terminal 4 of the charging facility 300 from the connection detection unit 611. In response to the notification of the connection detection, the charging control unit 613 controls the bidirectional charger 5 to perform a charging operation. The charging control unit 613 controls the battery 3 and the bidirectional charger 5 so that AC power received from the charging facility 300 via the terminal 4 is converted to DC power by the bidirectional charger 5 and supplied to the battery 3. In this way, the battery 3 can be charged.

[0068] The update unit 614 acquires a parameter set for connection with the grid 400 according to the grid connection information 632. When the grid connection information 632 includes a parameter set, the update unit 614 may acquire the parameters by extracting the parameter set from the grid connection information 632. When the grid connection information 632 includes a communication address for acquiring the parameters, the update unit 614 may access the server 600 via the communication unit 2, the terminal 4, the charging facility 300, and the communication line 500 to acquire the parameter set from the server 600. The update unit 614 updates the parameter set for connection with the grid 400 with the acquired parameter set. The update unit 614 may access the non-volatile memory 63 and update the parameter set 633 by overwriting the parameter set 633 with the acquired parameter set.

[0069] The parameter group 633 includes parameters related to a protection function in the event of a system accident in the system 100 at the destination of the vehicle 100, a function for continuing operation for a certain period of time, a function for preventing isolated operation, and the like.

[0070] For example, when the destination of the vehicle 100 is region A (see FIG. 1(a)), the parameter group 633 may include parameters as shown in FIG. 4. FIG. 4 is a diagram showing parameters for connecting to a grid 400a in region A. FIG. 4(a) illustrates parameters for a protection function in the event of a grid accident and a detection level and detection time for an islanding prevention function, and FIG. 4(b) illustrates parameters for an allowable level and allowable time for a function of continuing operation for a certain period of time.

[0071] 4(a), the parameter group 633 includes a parameter PT1 that sets the detection level of the overvoltage relay OVR to D1% and a parameter PT2 that sets the detection time to T1 seconds. The parameter group 633 includes a parameter PT3 that sets the detection level of the undervoltage relay UVR to D2% and a parameter PT4 that sets the detection time to T2 seconds.

[0072] 4(a), the parameter group 633 includes a parameter PT5 that sets the detection level of the over-frequency relay OFR to D3% and a parameter PT6 that sets the detection time to T3 seconds. The parameter group 633 includes a parameter PT7 that sets the detection level of the under-frequency relay UFR to D4% and a parameter PT8 that sets the detection time to T4 seconds. The parameter group 633 includes a parameter PT9 that sets the detection level of the reverse power relay RPR to D5% and a parameter PT10 that sets the detection time to T5 seconds. The parameter group 633 includes a parameter PT11 that sets the detection level of the under-power relay UPR to D6% and a parameter PT12 that sets the detection time to T6 seconds.

[0073] 4(b), the parameter group 633 includes a parameter PT13 that sets the allowable level of the voltage drop of the grid 400a to A1% or more of the rated voltage and a parameter PT14 that sets the allowable time to B1 seconds. The parameter group 633 includes a parameter PT15 that sets the allowable level of the frequency fluctuation of the grid 400a to -F1Hz to +F1Hz and a parameter PT16 that sets the allowable time to G1 cycles.

[0074] Alternatively, when the destination of the vehicle 100 is region B (see FIG. 1(b)), the parameter group 633 may include parameters as shown in FIG. 5. FIG. 5 is a diagram showing parameters for connecting to the grid 400b in region B. FIG. 5(a) illustrates parameters of a detection level and a detection time related to a protection function at the time of a grid accident and an islanding prevention function, and FIG. 6(b) illustrates parameters of an allowable level and an allowable time related to a function of continuing operation for a certain period of time.

[0075] 5(a), with regard to the protection function at the time of a system accident, the parameter group 633 includes a parameter PT1 that sets the detection level of the overvoltage relay OVR to D11% and a parameter PT2 that sets the detection time to T11 seconds. The parameter group 633 includes a parameter PT3 that sets the detection level of the undervoltage relay UVR to D12% and a parameter PT4 that sets the detection time to T12 seconds.

[0076] 5(a), the parameter group 633 includes a parameter PT5 that sets the detection level of the over-frequency relay OFR to D13% and a parameter PT6 that sets the detection time to T13 seconds. The parameter group 633 includes a parameter PT7 that sets the detection level of the under-frequency relay UFR to D14% and a parameter PT8 that sets the detection time to T14 seconds. The parameter group 633 includes a parameter PT9 that sets the detection level of the reverse power relay RPR to D15% and a parameter PT10 that sets the detection time to T15 seconds. The parameter group 633 includes a parameter PT11 that sets the detection level of the under-power relay UPR to D16% and a parameter PT12 that sets the detection time to T16 seconds.

[0077] 5(b), the parameter group 633 includes a parameter PT13 that sets the allowable level of the voltage drop in the grid 400b to A11% or more of the rated voltage and a parameter PT14 that sets the allowable time to B11 seconds. The parameter group 633 includes a parameter PT15 that sets the allowable level of the frequency fluctuation in the grid 400b to -F11Hz to +F11Hz and a parameter PT16 that sets the allowable time to G11 cycles.

[0078] 3 may update the parameters PT1 and PT2 by overwriting the parameters PT1 and PT2 included in the acquired parameter group and setting them in the overvoltage relay OVR. For example, when the vehicle 100 moves from region A to region B, the update unit 614 may update the parameter PT1 by overwriting the value of the parameter PT1 from D1% to D11% and setting it in the overvoltage relay OVR. The update unit 614 may update the parameter PT2 by overwriting the value of the parameter PT2 from T1 seconds to T11 seconds and setting it in the overvoltage relay OVR.

[0079] The update unit 614 may update the parameters PT3 and PT4 by overwriting the undervoltage relay UVR with the parameters PT3 and PT4 included in the acquired parameter group. For example, when the vehicle 100 moves from region A to region B, the update unit 614 may update the parameter PT3 by overwriting the value of the parameter PT3 from D2% to D12% and setting it in the undervoltage relay UVR. The update unit 614 may update the parameter PT4 by overwriting the value of the parameter PT4 from T2 seconds to T12 seconds and setting it in the undervoltage relay UVR.

[0080] The update unit 614 may update the parameters PT5 and PT6 by overwriting and setting the parameters PT5 and PT6 included in the acquired parameter group to the frequency up relay OFR. For example, when the vehicle 100 moves from region A to region B, the update unit 614 may update the parameter PT5 by overwriting the value of the parameter PT5 from D3% to D13% and setting it to the frequency up relay OFR. The update unit 614 may update the parameter PT6 by overwriting the value of the parameter PT6 from T4 seconds to T14 seconds and setting it to the frequency up relay OFR.

[0081] The update unit 614 may update the parameters PT7 and PT8 by overwriting and setting the parameters PT7 and PT8 included in the acquired parameter group to the down-frequency relay UFR. For example, when the vehicle 100 moves from region A to region B, the update unit 614 may update the parameter PT7 by overwriting the value of the parameter PT7 from D4% to D14% and setting the down-frequency relay UFR. The update unit 614 may update the parameter PT8 by overwriting the value of the parameter PT8 from T4 seconds to T14 seconds and setting the down-frequency relay UFR.

[0082] The update unit 614 may update the parameters PT9 and PT10 by overwriting and setting the parameters PT9 and PT10 included in the acquired parameter group in the reverse power relay RPR. For example, when the vehicle 100 moves from region A to region B, the update unit 614 may update the parameter PT9 by overwriting the value of the parameter PT9 from D5% to D15% and setting it in the reverse power relay RPR. The update unit 614 may update the parameter PT10 by overwriting the value of the parameter PT10 from T5 seconds to T15 seconds and setting it in the reverse power relay RPR.

[0083] The update unit 614 may update the parameters PT11 and PT12 by overwriting and setting the parameters PT11 and PT12 included in the acquired parameter group to the power shortage relay UPR. For example, when the vehicle 100 moves from region A to region B, the update unit 614 may update the parameter PT11 by overwriting the value of the parameter PT11 from D6% to D16% and setting it to the power shortage relay UPR. The update unit 614 may update the parameter PT12 by overwriting the value of the parameter PT12 from T6 seconds to T16 seconds and setting it to the power shortage relay UPR.

[0084] The discharge control unit 615 can control the battery 3 and the bidirectional charger 5 in response to detection of connection to the terminal 4 of the charging facility 300. The discharge control unit 615 receives a notification of detection of connection to the terminal 4 of the charging facility 300 from the connection detection unit 611. In response to the notification of connection detection, the discharge control unit 615 controls the bidirectional charger 5 to perform a discharging operation. The discharge control unit 615 controls the battery 3 and the bidirectional charger 5 so that the DC power received by the battery 3 is converted to AC power by the bidirectional charger 5 and supplied to the charging facility 300 via the terminal 4. This allows the battery 3 to be discharged.

[0085] The switching control section 616 is capable of controlling the switching of the grid interconnection relay NCR.

[0086] During a period in which the discharge operation is controlled by the discharge control unit 615, the opening / closing control unit 616 may transition the grid interconnection relay NCR to the off state in response to a detection signal from the overvoltage relay OVR, thereby stopping the discharge operation of the bidirectional charger 5.

[0087] During a period in which the discharge operation is controlled by the discharge control unit 615, the opening / closing control unit 616 may transition the grid interconnection relay NCR to the off state in response to a detection signal from the undervoltage relay UVR, thereby stopping the discharge operation of the bidirectional charger 5.

[0088] During a period in which the discharge operation is controlled by the discharge control unit 615, the opening / closing control unit 616 may transition the grid interconnection relay NCR to the off state in response to a detection signal from the frequency up relay OFR, thereby stopping the discharge operation of the bidirectional charger 5.

[0089] During a period in which the discharge operation is controlled by the discharge control unit 615, the opening / closing control unit 616 may transition the grid interconnection relay NCR to the off state in response to a detection signal from the under-frequency relay UFR, thereby stopping the discharge operation of the bidirectional charger 5.

[0090] During a period in which the discharge operation is controlled by the discharge control unit 615, the opening / closing control unit 616 may transition the grid interconnection relay NCR to an off state in response to a detection signal from the reverse power relay RPR, thereby stopping the discharge operation of the bidirectional charger 5.

[0091] During a period in which the discharge operation is controlled by the discharge control unit 615, the switching control unit 616 may transition the grid interconnection relay NCR to the off state in response to a detection signal from the power shortage relay UPR, thereby stopping the discharge operation of the bidirectional charger 5.

[0092] During a period in which the discharge operation is controlled by the discharge control unit 615, the switching control unit 616 may maintain the on state of the grid interconnection relay NCR and continue the discharge operation of the bidirectional charger 5 in accordance with the amplitude of the voltage detected by the voltage detector VD and the parameters PT13 and PT14. The switching control unit 616 may maintain the on state of the grid interconnection relay NCR and continue the discharge operation of the bidirectional charger 5 until the duration of the state in which the amplitude of the voltage detected by the voltage detector VD falls outside the allowable voltage range reaches an allowable time.

[0093] During a period in which the discharge operation is controlled by the discharge control unit 615, the switching control unit 616 may maintain the on state of the grid interconnection relay NCR and continue the discharge operation of the bidirectional charger 5 in accordance with the frequency of the voltage detected by the frequency detector FD and the parameters PT15 and PT16. The switching control unit 616 may maintain the on state of the grid interconnection relay NCR and continue the discharge operation of the bidirectional charger 5 until the duration of the state in which the frequency of the voltage detected by the frequency detector FD is outside the permissible frequency range reaches the permissible time.

[0094] Next, the operation of the charging device 1 will be described with reference to Fig. 6. Fig. 6 is a flowchart showing the operation of the charging device 1. Fig. 6 illustrates an example in which each unit in the processor 61 is realized by software.

[0095] In the charging device 1, the controller 6 waits until it is detected that the terminal 302 of the charging facility 300 is mated with the terminal 4 (No in S1).

[0096] When the controller 6 detects that the terminal 302 of the charging equipment 300 has been engaged with the terminal 4 (Yes in S1), it controls the communication unit 2 to establish communication with the charging equipment 300 (S2) and transmits a grid connection information request to the charging equipment 300 requesting information for grid connection (S3).

[0097] When the communication unit 2 receives the grid connection information from the charging facility 300 as a response, the controller 6 holds the received grid connection information as grid connection information 632. The controller 6 acquires parameters according to the grid connection information 632 (S4), and reflects the acquired parameters in the software as discharge control parameters (S6). For example, the controller 6 may update the parameter set 633 to be used by the program 631 by overwriting the parameter set 633 in the non-volatile memory 63 with the acquired parameter set.

[0098] The controller 6 determines whether or not the connection to the grid 400 is permitted (S7). For example, if the controller 6 does not receive a connection permission notification from the charging equipment 300 within a predetermined time after sending the notification in S6, it determines that the connection is not permitted (No in S7), stops charging and discharging by the bidirectional charger 5, turns off (opens) the grid connection relay NCR to perform parallel-off, and stops communication with the charging equipment 300 by the communication unit 2 (S8). As a result, the controller 6 releases the connection to the grid 400.

[0099] If the controller 6 receives a connection permission notification from the charging equipment 300 within a predetermined time after sending the notification in S6, it determines that the connection is permitted (Yes in S7) and exchanges information required for charging and discharging with the charging equipment 300 via the communication unit 2. Information supplied from the charging equipment 1 to the charging equipment 300 includes a charge / discharge current upper limit, battery information, departure time, target SOC, etc. Information supplied from the charging equipment 300 to the charging equipment 1 includes a charge / discharge allowable current value, etc.

[0100] The controller 6 judges whether or not a parallel condition conforming to the grid interconnection technical requirement is satisfied (S10). The parallel condition conforming to the grid interconnection technical requirement may be, for example, a condition under which grid interconnection specified by parameters PT1 to PT16 can be executed, as exemplified in FIG. 4 or FIG. 5.

[0101] If the parallel conditions pursuant to the grid interconnection technical requirements are not met (No in S10), if a timeout has not occurred since the execution of S9 (No in S11), or if the disconnection button has not been pressed (No in S12), the controller 6 returns to S10.

[0102] When a timeout occurs from the execution of S9 (Yes in S11) or when there is no timeout from the execution of S9 (No in S11) and the disconnection button is pressed (Yes in S12), the controller 6 performs control so that the bidirectional charger 5 stops charging / discharging, the grid interconnection relay NCR is turned off (open) to perform parallel-off, and the communication unit 2 stops communication with the charging equipment 300 (S8).

[0103] When the paralleling conditions conforming to the grid interconnection technical requirements are satisfied (Yes in S10), the controller 6 turns on (closes) the grid interconnection relay NCR to perform paralleling (S13). As a result, the controller 6 restores the interconnection with the grid 400.

[0104] When the controller 6 detects that the disconnection button has been pressed (Yes in S14), it determines that the terminal 302 of the charging equipment 300 has been pulled out from the terminal 4, stops charging and discharging by the bidirectional charger 5, turns off (opens) the grid interconnection relay NCR to perform parallel-off, and stops communication with the charging equipment 300 by the communication unit 2 (S8). As a result, the controller 6 releases the interconnection with the grid 400.

[0105] If the controller 6 does not detect that the disconnection button has been pressed (No in S14), it determines whether charging or discharging is requested (S15). If charging is requested (charging requested in S15), the controller 6 performs charging control within the allowable charging current value (S16).

[0106] If discharge is requested (discharge requested in S15), the controller 6 performs discharge control within the discharge allowable current value (S17). If the controller 6 does not detect an abnormality in the consideration 400 (No in S18), the process returns to S14.

[0107] When the controller 6 detects an abnormality in the study 400 (Yes in S18), the controller 6 performs abnormality response control regarding the function of continuing operation for a certain period of time in accordance with the grid interconnection technical requirements (S19).

[0108] For example, the controller 6 may maintain the on state of the grid interconnection relay NCR and continue the discharging operation of the bidirectional charger 5 until the duration of the state in which the amplitude of the voltage detected by the voltage detector VD is outside the allowable voltage range reaches an allowable time.

[0109] Alternatively, the controller 6 may maintain the grid interconnection relay NCR in the on state and continue the discharging operation of the bidirectional charger 5 until the duration of the state in which the frequency of the voltage detected by the frequency detector FD is outside the allowable frequency range reaches the allowable time.

[0110] The controller 6 checks for abnormalities related to the protection function in the event of a grid accident and the function for preventing isolated operation, and determines whether or not parallel-off is necessary (S20).

[0111] For example, if the controller 6 does not receive a detection signal from any of the overvoltage relay OVR, undervoltage relay UVR, over-frequency relay OFR, under-frequency relay UFR, reverse power relay RPR, and under-power relay UPR, it determines that parallel-off is not necessary (No in S20) and returns the process to S14.

[0112] When the controller 6 receives a detection signal from at least one of the overvoltage relay OVR, undervoltage relay UVR, over-frequency relay OFR, under-frequency relay UFR, reverse power relay RPR, and under-power relay UPR, it determines that parallel-off is necessary (Yes in S20) and performs abnormality response control related to the protection function at the time of a grid accident and the islanding prevention function in accordance with the grid interconnection technical requirements (S21). For example, the controller 6 transitions the grid interconnection relay NCR to the off state. After that, the controller 6 returns the process to S14.

[0113] Thereafter, when the controller 6 detects that the disconnection button has been pressed (Yes in S14), it determines that the terminal 302 of the charging facility 300 has been pulled out from the terminal 4, stops charging and discharging by the bidirectional charger 5, and stops communication with the charging facility 300 by the communication unit 2 (S8). As a result, the controller 6 releases the connection with the grid 400.

[0114] Next, a use case of the charging device 1 will be described with reference to Fig. 7. Fig. 7 is a sequence chart showing a use case of the charging device.

[0115] The charging facility 300 receives (SC1) the connection information 3031 from the server 600 and stores it.

[0116] When the charging facility 300 is connected to the terminal 4 (SC2), the connection detector 41 supplies a detection signal of an active level indicating the detection of connection to the controller 6 (SC3).

[0117] Upon receiving a detection signal indicating connection detection, the controller 6 controls the charging of the bidirectional charger 5 according to the establishment of a predetermined condition (for example, the remaining charge of the battery 3 is equal to or lower than a lower reference value) (SC4). In response to this, AC power is transmitted from the grid 400 to the charging equipment 300 (SC5), AC power is transmitted from the charging equipment 300 to the terminal 4 (SC6), AC power is transmitted from the terminal 4 to the bidirectional charger 5 (SC7), the AC power is converted to DC power in the bidirectional charger 5, and the DC power is supplied from the bidirectional charger 5 to the battery 3 (SC8).

[0118] When the charging facility 300 is pulled out from the terminal 4 and enters a connected state (SC9), the connection detector 41 supplies a detection signal of a non-active level indicating detection of a non-connection to the controller 6 (SC10).

[0119] When receiving the detection signal indicating that the connection is not established, the controller 6 controls the bidirectional charger 5 to stop (SC11).

[0120] When the charging facility 300 is again connected to the terminal 4 (SC12), the connection detector 41 supplies a detection signal of an active level indicating the detection of connection to the controller 6 (SC13).

[0121] When receiving the detection signal of connection detection, the controller 6 generates a grid-connection information request and supplies it to the communication unit 2 in response to the establishment of a predetermined condition (for example, the remaining charge of the battery 3 is equal to or greater than an upper reference value) (SC14). The communication unit 2 transmits the grid-connection information request to the charging facility 300 (SC15).

[0122] Upon receiving the grid-connection information request, the charging facility 300 transmits the grid-connection information 3031 to the communication unit 2 in response to the grid-connection information request (SC17).

[0123] Upon receiving the connection information, the communication unit 2 supplies the connection information to the controller 6 (SC17). The controller 6 holds the received connection information as connection information 632. The controller 6 acquires parameters according to the connection information 632, and updates the parameters for connecting to the grid 400 with the acquired parameters (SC18).

[0124] The controller 6 controls the discharge of the bidirectional charger 5 (SC19). In response to this, DC power is transmitted from the battery 3 to the bidirectional charger 5 (SC20), the DC power is converted to AC power by the bidirectional charger 5, the AC power is transmitted from the bidirectional charger 5 to the terminal 4 (SC21), the AC power is transmitted from the terminal 4 to the charging equipment 300 (SC22), and the AC power is transmitted from the charging equipment 300 to the grid 400 (SC23).

[0125] When the controller 6 detects an abnormality in the grid 400 (SC24), it stops or continues the discharging operation of the bidirectional charger 5 according to the updated parameters (SC25).

[0126] For example, when the controller 6 receives a detection signal from at least one of the overvoltage relay OVR, the undervoltage relay UVR, the over-frequency relay OFR, the under-frequency relay UFR, the reverse power relay RPR, and the under-power relay UPR, it transitions the grid interconnection relay NCR to the off state and stops the discharging operation of the bidirectional charger 5.

[0127] Alternatively, the controller 6 maintains the on state of the grid interconnection relay NCR and continues the discharging operation of the bidirectional charger 5 until the duration of the state in which the amplitude of the voltage detected by the voltage detector VD is outside the allowable voltage range reaches the allowable time.

[0128] Alternatively, the controller 6 maintains the on state of the grid interconnection relay NCR and continues the discharging operation of the bidirectional charger 5 until the duration of the state in which the frequency of the voltage detected by the frequency detector FD is outside the permissible frequency range reaches the permissible time.

[0129] As described above, in the present embodiment, the charging device 1 receives interconnection information related to technical requirements for interconnection with the grid 400 when connected to the charging facility 300, and updates parameters for discharging to the charging facility 300. This allows the charging device 1 to perform grid interconnection according to the technical requirements for each region.

[0130] As a first modified example of the embodiment, the charging device 1i mounted on the vehicle 100i may be capable of wired and wireless communication as shown in Fig. 8 and Fig. 9. Fig. 8 is a diagram showing charging and discharging at a destination of the vehicle 100i mounted with the charging device 1i according to the first modified example of the embodiment. Fig. 9 is a diagram showing the configuration of the charging device 1i according to the first modified example of the embodiment.

[0131] 9, the charging device 1i further includes a communication unit 8i. The communication unit 8i can communicate with the charging facility 300 via a communication line 3012 in a cable 301. The communication unit 8i can communicate with the server 600 via a wireless communication line, a communication line 500. The communication unit 8i is connected to the controller 6i.

[0132] 8(a), when the destination of the vehicle 100i is region A, the charging device 1i receives the connection information from the charging facility 300a via the cable 301a when connected to the charging facility 300a at a charging station in region A and stores the connection information as the connection information 632. When the connection information 632 includes a communication address for acquiring parameters, the controller 6i may access the server 600a via the communication unit 8i and the communication line 500a to acquire the parameters from the server 600a. This allows the controller 6i to control the discharging operation to the terminal 4 side of the bidirectional charger 5 using parameters corresponding to region A.

[0133] 8(b), when the destination of the vehicle 100i is region B, the charging device 1i receives the connection information from the charging facility 300b via the cable 301b when connected to the charging facility 300b at a charging station in region B, and stores the connection information as the connection information 632. When the connection information 632 includes a communication address for acquiring parameters, the controller 6i may access the server 600b via the communication unit 8i and the communication line 500b to acquire the parameters from the server 600b. This allows the controller 6i to control the discharging operation to the terminal 4 side of the bidirectional charger 5 using parameters corresponding to region B.

[0134] As a second modified example of the embodiment, the charging device 1j mounted on the vehicle 100i may be capable of wireless communication as shown in Fig. 10 and Fig. 11. Fig. 10 is a diagram showing charging and discharging at a destination of the vehicle 100j mounted with the charging device 1j according to the second modified example of the embodiment. Fig. 11 is a diagram showing the configuration of the charging device 1j according to the second modified example of the embodiment.

[0135] 11, the charging device 1j further includes a communication unit 8j, and the communication unit 2 is omitted. The communication unit 8j is capable of communicating with the server 600 via a wireless communication line, a communication line 500. The communication unit 8j is connected to the controller 6j.

[0136] 10(a), when the destination of the vehicle 100j is region A, the charging device 1j receives the connection information from the charging facility 300a via a wireless communication line when the charging device 1j is connected to the charging station in region A and stores the connection information as the connection information 632. When the connection information 632 includes a communication address for acquiring parameters, the controller 6j may access the server 600a via the communication unit 8j and the communication line 500a to acquire the parameters from the server 600a. This allows the controller 6j to control the discharging operation to the terminal 4 side of the bidirectional charger 5 using parameters corresponding to region A.

[0137] 10(b), when the destination of the vehicle 100j is region B, the charging device 1j receives the connection information from the charging facility 300b via a wireless communication line when the charging device 1j is connected to the charging facility 300b at a charging station in region B, and stores the connection information as the connection information 632. When the connection information 632 includes a communication address for acquiring parameters, the controller 6j may access the server 600b via the communication unit 8j and the communication line 500b to acquire the parameters from the server 600b. This allows the controller 6j to control the discharging operation to the terminal 4 side of the bidirectional charger 5 using parameters corresponding to region B.

[0138] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents described in the claims, as well as in the scope and spirit of the invention. [Explanation of symbols]

[0139] 1,1i,1j charging device 2,8i,8j Communication Department 3 Battery 4 Terminals 5-way charger 6,6i,6j Controller

Claims

1. A communication unit that receives grid-connection information related to technical requirements for interconnection with the grid from a charging facility to which the grid is connected; A battery capable of storing power; A terminal to which the charging facility can be connected; a bidirectional charger connected between the terminal and the battery and capable of bidirectionally converting AC power and DC power; a controller that is capable of acquiring parameters according to the received grid connection information and controlling a discharging operation of the bidirectional charger to the terminal side using the acquired parameters; A charging device comprising:

2. The communication unit transmits a grid-connection information request to the charging facility in response to the charging facility being connected to the terminal, and receives the grid-connection information from the charging facility as a response to the grid-connection information request. The charging device according to claim 1 .

3. a first relay that is inserted in a line connecting the terminal and the bidirectional charger and is in an on state; The controller: a second relay having one end disposed on the line side and capable of detecting a physical quantity related to a voltage of the line; The controller acquires a first parameter related to voltage and a second parameter related to time in response to the received grid connection information, and transitions the first relay to an off state in response to a result detected by the second relay using the first parameter and the second parameter, thereby stopping a discharging operation of the bidirectional charger. The charging device according to claim 1 .

4. a first relay that is inserted in a line connecting the terminal and the bidirectional charger and is in an on state; The controller: a second relay having one end disposed on the line side and capable of detecting a physical quantity related to a frequency of the line; The controller acquires a third parameter related to a frequency and a fourth parameter related to a time according to the received grid connection information, and transitions the first relay to an off state according to a result detected by the second relay using the third parameter and the fourth parameter, thereby stopping a discharging operation of the bidirectional charger. The charging device according to claim 1 .

5. a first relay that is inserted in a line connecting the terminal and the bidirectional charger and is in an on state; The controller: a second relay having one end disposed on the line side and capable of detecting a physical quantity related to the power of the line; The controller acquires a fifth parameter related to power and a sixth parameter related to time in accordance with the received grid-connection information, and transitions the first relay to an off state in accordance with a result detected by the second relay using the fifth parameter and the sixth parameter, thereby stopping a discharging operation of the bidirectional charger. The charging device according to claim 1 .

6. a first relay that is inserted in a line connecting the terminal and the bidirectional charger and is in an on state; a voltage detector having one end connected to the line and configured to detect the amplitude of the voltage on the line; Further equipped with The controller acquires a seventh parameter related to voltage and an eighth parameter related to time in accordance with the received grid connection information, and maintains an on state of the first relay and controls continuation of a discharging operation of the bidirectional charger in accordance with an amplitude of the voltage detected by the voltage detector, the seventh parameter, and the eighth parameter. The charging device according to claim 1 .

7. a first relay that is inserted in a line connecting the terminal and the bidirectional charger and is in an on state; a frequency detector having one end connected to the line for detecting a frequency of the voltage on the line; Further equipped with The controller acquires a ninth parameter related to a frequency and a tenth parameter related to a time in accordance with the received grid connection information, and maintains an on state of the first relay and controls continuation of a discharging operation of the bidirectional charger in accordance with a frequency of a voltage detected by the frequency detector, the ninth parameter, and the tenth parameter. The charging device according to claim 1 .

8. a charging device including a terminal to which a charging facility connected to a grid can be connected, a battery capable of storing power, and a bidirectional charger connected between the terminal and the battery and capable of bidirectionally converting AC power and DC power, in response to the charging facility being connected to the terminal, the charging device transmitting a grid-connection information request to the charging facility; receiving grid connection information from the charging facility as a response to the grid connection information request; Obtaining parameters according to the received grid connection information; Using the acquired parameters, control a discharging operation of the bidirectional charger toward the terminal side; A method for controlling a charging device comprising the steps of:

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