Charging system and control method thereof

Abstract

To provide a charging system and a control method thereof capable of suppressing power theft without using quasi-personal information.SOLUTION: A controller 11 of a charging system 1 includes an acquisition section 111 and a determination section 112. The acquisition section 111 acquires charging parameters related to the charging of a storage battery 62 from an electric vehicle 60 by causing a communication section 14 to communicate with the electric vehicle 60 via a communication line 72. The determination section 112 determines whether to permit the electric vehicle 60, to which a vehicle coupler 20 is connected, to be charged, by matching the charging parameters acquired by the acquisition section 111 with the permission parameters, which are the charging parameters of one or more vehicles that are permitted to be charged by the charging system 1. The determination section 112 permits DC power to be supplied from a DC power supply to the storage battery 62 if the charging parameters match the permission parameters, but prohibits the DC power to be supplied from the DC power supply to the storage battery 62 if none of the charging parameters matches the permission parameters.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a charging system and a control method thereof. More specifically, the present disclosure relates to a charging system for charging a storage battery of an electric vehicle and a control method thereof.

Background Art

[0002] Patent Document 1 discloses a power supply system that supplies power from a power supply device to a power receiving device mounted on a vehicle. The power receiving device includes a storage unit that stores identification information for identifying the device itself. The power supply device includes a storage unit that records identification information of a partner for whom power supply is permitted. When the power supply device receives the identification information from the power receiving device, the power supply device collates the received identification information with the identification information stored in the storage unit. When the power supply device determines that the received identification information matches the identification information stored in the storage unit, the power supply device permits power supply to the power receiving device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the power supply system of Patent Document 1, in order to authenticate the power receiving device, the identification information assigned to the power receiving device is used. Since the identification information assigned to the power receiving device is information equivalent to personal information, security measures are required to prevent leakage of the identification information. Therefore, measures such as encrypting the communication between the power receiving device and the power supply device are required.

[0005] An object of the present disclosure is to provide a charging system and a control method thereof that can suppress power theft without using information equivalent to personal information.

Means for Solving the Problems

[0006] A charging system according to an aspect of the present disclosure is a charging system for charging a battery of an electric vehicle existing in a parking space of a facility. The charging system includes a DC power supply unit, a communication unit, and a control unit. The DC power supply unit can supply DC power to the battery of the electric vehicle via the power line in a state where a vehicle coupler connected to a charging cable including a power line and a communication line is connected to a vehicle inlet of the electric vehicle. The communication unit can communicate with the electric vehicle via the communication line in a state where the vehicle coupler is connected to the vehicle inlet. The control unit controls operations of the DC power supply unit and the communication unit. The control unit has an acquisition unit and a determination unit. The acquisition unit acquires charging parameters related to charging of the battery from the electric vehicle by causing the communication unit to communicate with the electric vehicle via the communication line. The determination unit performs a determination process of determining whether to permit charging of the electric vehicle to which the vehicle coupler is connected by comparing the charging parameters acquired by the acquisition unit with permission parameters that are the charging parameters of one or more permitted vehicles for which charging by the charging system is permitted. The determination unit permits supply of DC power from the DC power supply unit to the battery when the charging parameters match the permission parameters. The determination unit does not permit supply of DC power from the DC power supply unit to the battery when the charging parameters do not match the permission parameters.

[0007] The control method according to one aspect of the present disclosure is a control method for a charging system. The charging system includes a DC power supply unit capable of supplying DC power to a storage battery of an electric vehicle via a power line in a state where a vehicle coupler connected to a charging cable including the power line and a communication line is connected to a vehicle inlet of the electric vehicle existing in a parking space of a facility. The control method includes an acquisition step and a determination step. In the acquisition step, in a state where the vehicle coupler is connected to the vehicle inlet, by communicating with the electric vehicle via the communication line, charging parameters related to charging of the storage battery are acquired from the electric vehicle. In the determination step, by comparing the charging parameters acquired in the acquisition step with permission parameters that are the charging parameters of one or more permitted vehicles for which permission to supply DC power is permitted from the DC power supply unit, it is determined whether to permit charging of the electric vehicle. In the determination step, when the charging parameters match the permission parameters, supply of DC power from the DC power supply unit to the storage battery is permitted. In the determination step, when the charging parameters do not match the permission parameters, supply of DC power from the DC power supply unit to the storage battery is not permitted.

Advantages of the Invention

[0008] According to the present disclosure, there is provided a charging system and a control method thereof capable of suppressing power theft without using information corresponding to personal information.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0010] Hereinafter, the charging system and its control method according to the embodiment will be described in detail with reference to the drawings. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as the effects of the present disclosure can be achieved.

[0011] (Embodiment) (1) Overview The charging system 1 of the present embodiment is a system for charging the battery 62 of the electric vehicle 60 existing in the parking space 101 of the facility 100.

[0012] The charging system 1 includes a DC power supply unit (for example, a DC / DC converter 13 in the present embodiment), a communication unit 14, and a control unit 11.

[0013] The DC power supply unit can supply DC power to the battery 62 of the electric vehicle 60 via the power line 71 in a state where the vehicle coupler 20 is connected to the vehicle inlet 61 of the electric vehicle 60. The vehicle coupler 20 is connected to a charging cable 70 including a power line 71 and a communication line 72.

[0014] The communication unit 14 can communicate with the electric vehicle 60 via the communication line 72 in a state where the vehicle coupler 20 is connected to the vehicle inlet 61.

[0015] The control unit 11 controls the operations of the DC power supply unit and the communication unit 14.

[0016] The control unit 11 includes an acquisition unit 111 and a determination unit 112.

[0017] The acquisition unit 111 acquires charging parameters related to the charging of the battery 62 from the electric vehicle 60 by causing the communication unit 14 to communicate with the electric vehicle 60 via the communication line 72.

[0018] The determination unit 112 performs a determination process of determining whether to permit charging of the electric vehicle 60 to which the vehicle coupler 20 is connected by collating the charging parameters acquired by the acquisition unit 111 with the permission parameters. The permission parameters are the charging parameters of one or more permitted vehicles for which charging by the charging system 1 is permitted.

[0019] When the charging parameters match the permission parameters, the determination unit 112 permits the supply of DC power from the DC power supply unit to the storage battery 62. When the charging parameters do not match the permission parameters, the determination unit 112 does not permit the supply of DC power from the DC power supply unit to the storage battery 62.

[0020] Here, the facility 100 is, for example, a building used by the user of the electric vehicle 60, and in this embodiment, it is a building for a single-family house or a condominium unit in a multi-family house. Note that the facility 100 is not limited to a building for a dwelling unit, and may be a non-residential building such as an office building, a commercial facility, a supermarket, a store, a school facility, or a hospital. The parking space 101 is a parking space provided outside or inside the facility 100 (e.g., underground, etc.), and is a space for parking the electric vehicle 60 charged by the charging system 1.

[0021] The electric vehicle 60 has a storage battery 62 for supplying power to the driving motor, and runs by driving the driving motor with the power stored in the storage battery 62. The electric vehicle 60 is, for example, a battery electric vehicle (BEV) or a plug-in hybrid electric vehicle (PHEV). Note that there are multiple types of charging methods for the electric vehicle 60, and the charging system 1 of the present embodiment adopts, for example, a charging method compliant with the CHAdeMO standard. Note that there are multiple versions of the charging method compliant with the CHAdeMO standard due to changes in the charging sequence and the like, and a CHAdeMO management number indicating the version of the charging sequence is set for the electric vehicle 60 compliant with the CHAdeMO standard. In addition, some of the electric vehicle 60 and the charging system 1 are compatible with a vehicle-to-home (V2H) system capable of supplying power from the storage battery 62 of the electric vehicle 60 to the load of the facility 100 via the charging system 1. There are also multiple versions of the V2H system due to changes in the charging sequence and the like, and a V2H management number indicating the version of the charging sequence is set for the electric vehicle 60 and the charging system 1 compatible with the V2H system. The permitted vehicle is the electric vehicle 60 permitted to be charged by the charging system 1. When the charging system 1 is shared by multiple users, there may be multiple permitted vehicles.

[0022] The charging parameter is information different from the personal information that can identify the user who uses the electric vehicle 60, and although it cannot identify each individual electric vehicle 60, it is information that can identify the type of the electric vehicle 60. The electric vehicle 60 can be classified into multiple types according to, for example, the vehicle type, model, model year, production lot, etc. of the electric vehicle 60. The charging parameter is information whose value changes according to the type of the electric vehicle 60.

[0023] The charging parameters may include one or more of, for example, the total battery capacity of the storage battery 62 mounted on the electric vehicle 60, the battery endurance upper limit value, the charging current command value, the charging voltage upper limit value, the discharge voltage lower limit value, the CHAdeMO management number, the V2H management number, and the response time. The total battery capacity is the total capacity of the drive storage battery 62 provided in the electric vehicle 60. The battery endurance upper limit value is the voltage value at which charging is stopped to protect the storage battery 62 by the charging system 1. The charging current command value is the command value (target value) of the charging current of the storage battery 62. The charging voltage upper limit value is the target value of the charging voltage of the storage battery 62. The discharge voltage lower limit value is the lower limit value of the battery voltage of the storage battery 62 when discharging from the storage battery 62. The response time is the time from when the charging device 10 transmits a signal to the electric vehicle 60 until the electric vehicle 60 responds, or the time until the state of the electric vehicle 60 changes, in the communication between the charging device 10 and the electric vehicle 60.

[0024] These charging parameters are information whose values change depending on the type of the electric vehicle 60 having different designs or specifications, and are information that can identify the type of the electric vehicle 60 based on the charging parameters. The determination unit 112 determines whether the electric vehicle 60 connected to the vehicle coupler 20 matches the permitted vehicle by comparing the charging parameters acquired by the acquisition unit 111 with the permitted parameters. Here, since the charging parameters are information that can identify the type of the electric vehicle 60, the determination unit 112 can determine whether the type of the electric vehicle 60 connected to the vehicle coupler 20 matches the type of the permitted vehicle by comparing the charging parameters acquired by the acquisition unit 111 with the permitted parameters.

[0025] When the charging parameters acquired by the acquisition unit 111 do not match the permitted parameters, the determination unit 112 prohibits the supply of DC power from the DC power supply unit to the storage battery 62. Therefore, when the type of the electric vehicle 60 connected to the vehicle coupler 20 does not match the permitted vehicle, the supply of DC power to the electric vehicle 60 connected to the vehicle coupler 20 can be blocked. Thus, when an electric vehicle 60 of a type different from the permitted vehicle is connected to the vehicle coupler 20, the power supply to this electric vehicle 60 can be stopped, and the possibility of power theft in which an electric vehicle 60 other than the permitted vehicle receives power supply from the charging system 1 can be reduced. Further, in the present embodiment, the determination unit 112 performs determination processing by comparing the charging parameters acquired from the electric vehicle 60 with the permitted parameters. Since the charging parameters are not information equivalent to personal information such as the chassis number of the electric vehicle 60, the electric vehicle 60 can be authenticated without using information equivalent to personal information, and power theft can be suppressed. Further, since the charging parameters are not information equivalent to personal information, there is no need for security measures for preventing leakage of the charging parameters, and there is also an advantage that the installation cost of the charging system 1 can be reduced.

[0026] Note that when there are a plurality of permitted vehicles, the determination unit 112 permits the supply of DC power from the DC power supply unit to the storage battery 62 if the charging parameters acquired by the acquisition unit 111 match the permitted parameters of any one of the plurality of permitted vehicles. Further, the determination unit 112 prohibits the supply of DC power from the DC power supply unit to the storage battery 62 when the charging parameters acquired by the acquisition unit 111 do not match any of the permitted parameters of the plurality of permitted vehicles.

[0027] (2) Details Hereinafter, the charging system 1 according to the present embodiment will be described in detail with reference to the drawings.

[0028] (2.1) Configuration (2.1.1) Electric vehicle The electric vehicle 60 charged by the charging system 1 includes a vehicle inlet 61, a storage battery 62, and a communication unit 63.

[0029] A vehicle coupler 20 can be connected to a vehicle inlet 61. The vehicle coupler 20 is configured to be detachable from the vehicle inlet 61.

[0030] The storage battery 62 is a secondary battery such as, for example, a lithium-ion battery, a nickel-metal hydride battery, an electric double layer capacitor, or an all-solid-state battery. A contactor 64 is connected between the vehicle inlet 61 and the storage battery 62. The electric vehicle 60 includes a control circuit that controls the opening and closing of the contactor 64. When the control circuit closes the contactor 64 with the vehicle coupler 20 connected to the vehicle inlet 61, the storage battery 62 is charged with DC power supplied from the DC power supply unit of the charging device 10.

[0031] The communication unit 63 can communicate with the communication unit 14 of the charging device 10. The communication unit 63 communicates with the communication unit 14 of the charging device 10 via a communication line 72 with the vehicle coupler 20 connected to the vehicle inlet 61.

[0032] Also, the electric vehicle 60 includes a traveling motor and a drive circuit for the traveling motor. The drive circuit drives the traveling motor with power supplied from the storage battery 62.

[0033] (2.1.2) Configuration of the charging system The charging system 1 includes, for example, a charging device 10 installed in a parking space 101 of a facility 100.

[0034] In the facility 100, for example, a distribution board 40 that distributes AC power supplied from a system power supply PS1 such as a commercial AC power supply (AC100 / 200V, 50 / 60Hz AC power supply) to a load 41 in the facility 100 is installed. The load 41 is, for example, a lighting fixture or an air-conditioning device.

[0035] In addition, the facility 100 is provided with an operation terminal 30 for operating the charging system 1 and monitoring the state of the charging system 1. The operation terminal 30 is arranged inside the facility 100. When the facility 100 is an apartment building, the operation terminal 30 is arranged in a place where the entry of persons other than the residents of the apartment building, such as each household of the apartment building or a shared space inside the apartment building, is restricted.

[0036] The operation terminal 30 includes a first operation unit 31 and a display unit 32. The operation terminal 30 is configured to be communicable with the charging device 10. The communication method between the operation terminal 30 and the charging device 10 may be a wireless communication method or a wired communication method. The operation terminal 30 is, for example, a dedicated operation device, but may also be a smartphone or a tablet computer having a communication function.

[0037] The display unit 32 has a display device such as a liquid crystal display or an organic EL display, for example. The display content of the display unit 32 is controlled by, for example, the control unit 11 of the charging system 1. That is, the charging system 1 further includes the display unit 32. The display content of the display screen of the display unit 32 is controlled by the control unit 11 of the charging device 10.

[0038] The first operation unit 31 receives the operation of the user who uses the facility 100. When the first operation unit 31 receives the user's operation, it outputs operation information indicating the operation content to the control unit 11 of the charging device 10. The first operation unit 31 has an input device such as a touch pad provided on the display device included in the display unit 32, for example. That is, the first operation unit 31 and the display unit 32 are integrated as a touch panel. The first operation unit 31 is arranged inside the facility 100 and is used to switch various operation modes of the charging system 1 and perform various settings. When the charging system 1 is combined with a power generation and storage connection system that connects a distributed power source such as a solar power generation system or a power storage system to the grid power source PS1, the first operation unit 31 may be used to perform a switching operation of the connection operation between the solar power generation system or the power storage system and the grid power source PS1.

[0039] The charging device 10 includes a control unit 11, an inverter 12, a DC / DC converter 13 which is a DC power supply unit, a communication unit 14, a storage unit 17, a communication unit 18, and a lock unit 19. The charging device 10 is arranged, for example, in a parking space 101 where the electric vehicle 60 to be charged is parked.

[0040] The control unit 11 controls the transmission and reception of signals by the sequence circuit unit 15 according to a predetermined charging sequence or charge-discharge sequence. Further, the control unit 11 controls the operations of the inverter 12 and the DC / DC converter 13 according to a predetermined charging sequence or charge-discharge sequence.

[0041] The control unit 11 is mainly composed of a computer system having one or more processors and a memory. The functions of the control unit 11 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, may be provided through a telecommunication line such as the Internet, or may be provided by being recorded in a non-transitory recording medium such as a memory card.

[0042] The control unit 11 has the functions of the acquisition unit 111 and the determination unit 112 described above. Note that the acquisition unit 111 and the determination unit 112 only indicate the functions realized by the control unit 11, and do not necessarily indicate a physical configuration.

[0043] The inverter 12 converts the AC power supplied from the distribution board 40 into DC power and outputs it to the DC / DC converter 13. The inverter 12 is, for example, a full-bridge inverter circuit in which four switching elements are bridge-connected, but the circuit configuration of the inverter 12 can be appropriately changed. A power outlet 42 capable of outputting AC power supplied from the inverter 12 using the battery 62 of the electric vehicle 60 as a power source when the utility power supply PS1 fails is connected to the circuit between the inverter 12 and the distribution board 40.

[0044] The DC / DC converter 13 converts the voltage value of the DC voltage input from the inverter 12 and outputs it to the electric vehicle 60 via the vehicle coupler 20. The DC / DC converter 13 is, for example, a buck-boost chopper circuit, but the circuit configuration of the DC / DC converter 13 can be changed as appropriate.

[0045] Note that the DC / DC converter 13 may be a bidirectional converter corresponding to both the charging operation for charging the storage battery 62 and the discharging operation for discharging the storage battery 62. When the DC / DC converter 13 is a bidirectional converter, the inverter 12 may be a bidirectional inverter capable of bidirectional power conversion.

[0046] Note that when the charging system 1 is applied to a power generation and storage linked system, for example, a DC / DC converter that converts the output voltage of a distributed power source and outputs it to the DC bus is connected to the DC bus between the inverter 12 and the DC / DC converter 13. In this case, depending on the output direction of the DC / DC converter connected to the distributed power source, it may be determined whether the inverter 12 is a unidirectional inverter circuit or a bidirectional inverter circuit.

[0047] The communication unit 14 can communicate with the communication unit 63 of the electric vehicle 60 via the communication line 72 in a state where the vehicle coupler 20 is connected to the vehicle inlet 61.

[0048] Here, the communication unit 14 includes two communication circuits (a sequence circuit unit 15 and a CAN communication unit 16).

[0049] The sequence circuit unit 15 communicates with the communication unit 63 of the electric vehicle 60 via the first communication line 73 using a communication protocol compliant with the communication standard for the charger of the electric vehicle 60 (for example, IEC61851-24). A charging sequence or a charge / discharge sequence is executed according to various signals exchanged between the sequence circuit unit 15 and the communication unit 63. The charging sequence or the charge / discharge sequence includes a plurality of processes, and by sequentially executing the plurality of processes, charging or discharging of the storage battery 62 of the electric vehicle 60 is performed.

[0050] Here, the signals exchanged between the sequence circuit section 15 and the communication section 63 include a "start / stop operation 1" signal, a "start / stop operation 2" signal, a connector connection signal (also referred to as a connector connection confirmation signal), an operation permission / prohibition signal, and the like.

[0051] The "start / stop operation 1" signal is a signal for the charging device 10 to notify the electric vehicle 60 of a start request for a charging sequence (or a charge / discharge sequence). When the communication section 63 of the electric vehicle 60 detects the start / stop operation 1 signal, the charging sequence (or the charge / discharge sequence) on the electric vehicle 60 side is started.

[0052] The "start / stop operation 2" signal is a signal for the charging device 10 to notify the electric vehicle 60 of a start request for charging or discharging. When the communication section 63 of the electric vehicle 60 detects the start / stop operation 2 signal, the control circuit of the electric vehicle 60 closes the contactor 64 connected between the vehicle inlet 61 and the storage battery 62. When the sequence circuit section 15 of the charging device 10 stops outputting the "start / stop operation 2" signal, the control circuit of the electric vehicle 60 opens the contactor 64 to stop the charging (or discharging) of the storage battery 62.

[0053] The connector connection signal is a signal for the charging device 10 to notify the electric vehicle 60 of the state in which the vehicle coupler 20 is connected to the vehicle inlet 61. The electric vehicle 60 prohibits movement of the electric vehicle 60, for example, when the connector connection signal is input, and can prevent mis-starting when the vehicle coupler 20 is connected.

[0054] The operation permission / prohibition signal is a signal for notifying the charging device 10 to prohibit charging according to the state of the electric vehicle 60 (for example, the shift position, the state of the storage battery 62), etc., when the sequence circuit section 15 is outputting the "start / stop operation 1" signal. When the sequence circuit section 15 of the charging device 10 detects the operation permission / prohibition signal, the control unit 11 of the charging device 10 stops the charging or discharging operation and enters a state of stopping the output of the "start / stop operation 2" and "start / stop operation 1" signals.

[0055] The CAN communication unit 16 communicates via the second communication line 74 using, for example, a serial communication protocol compliant with ISO11898. By communicating with the communication unit 63 of the electric vehicle 60, the CAN communication unit 16 can obtain the specification values (such as the battery endurance upper limit value, the charging voltage upper limit value, the discharging voltage lower limit value, etc.) of the storage battery 62 and the state values (such as the total battery capacity, etc.) of the storage battery 62 from the electric vehicle 60. That is, by communicating with the communication unit 63 of the electric vehicle 60, the CAN communication unit 16 can receive charging parameters such as the total battery capacity, the battery endurance upper limit value, the charging voltage upper limit value, the discharging voltage lower limit value, etc. from the electric vehicle 60.

[0056] The storage unit 17 includes a non-volatile memory such as an EEPROM (Electrically Erasable and Programmable Read-Only Memory). The storage unit 17 stores, for example, permission parameters that are the charging parameters of one or more permitted vehicles.

[0057] The communication unit 18 can communicate with the server 200 via a communication network NT1 such as the Internet. In the storage device of the server 200, the charging parameters of a plurality of electric vehicles 60 that can be charging targets of the charging system 1 are registered.

[0058] The locking unit 19 maintains the connection state by holding the engaged state in which the latch portion of the vehicle coupler 20 is engaged with a part of the vehicle inlet 61 while charging the electric vehicle 60 in the connected state where the vehicle coupler 20 is connected to the vehicle inlet 61. That is, the charging system 1 further includes a locking unit 19 that locks the vehicle coupler 20 in the state where the vehicle coupler 20 is connected to the vehicle inlet 61. When a release command is input from the control unit 11 to the locking unit 19 after the charging by the charging device 10 stops, the locking unit 19 enables the release of the engaged state of the latch portion. When the engaged state of the latch portion becomes releasable, the user can remove the vehicle coupler 20 from the vehicle inlet 61.

[0059] The second operation unit 33 receives the operations of the user of the charging system 1. The second operation unit 33 is provided, for example, in a housing different from the housing of the charging device 10. The housing in which the second operation unit 33 is provided is installed at a position closer to the electric vehicle 60 parked in the parking space 101 than the charging device 10. When the second operation unit 33 receives a user operation on the charging device 10, it outputs operation information corresponding to the operation content to the control unit 11. The second operation unit 33 includes an operation unit such as a button or a touch panel, and a display unit such as a display lamp that displays the operating state of the charging device 10. When the charging device 10 has only the charging function of the electric vehicle 60, the second operation unit 33 may be provided with a charging start button, a charging stop button, a lock release button for releasing the lock of the vehicle coupler 20, and the like. When the charging device 10 has the charging function and the discharging function of the electric vehicle 60, the second operation unit 33 may be provided with a discharging start button for starting discharging from the electric vehicle 60 in addition to the charging start button, the charging stop button, and the lock release button. Note that in the charging system 1, it is not essential that the second operation unit 33 is provided in a housing different from the housing of the charging device 10, and the second operation unit 33 may be provided in the housing of the charging device 10.

[0060] (2.2) Operation Explanation The operation when the charging system 1 of the present embodiment executes the charging sequence will be described based on FIG. 2 and the like. Note that the sequence diagram in FIG. 2 is only an example of the control method of the charging system 1 according to the present embodiment, and the order of processing may be appropriately changed, and processing may be appropriately added or omitted.

[0061] When the user connects the vehicle coupler 20 of the charging device 10 to the vehicle inlet 61 of the electric vehicle 60 parked in the parking space 101, the voltage value of the first communication line 73 is pulled up to, for example, DC12V by the sequence circuit unit 15. When the vehicle coupler 20 is connected to the vehicle inlet 61, conduction of the first communication line 73 is detected from the change in the voltage level of the first communication line 73 in both the charging device 10 and the electric vehicle 60 (S1).

[0062] After that, when the user performs a charging start operation using the second operation unit 33, the second operation unit 33 receives the user's charging start operation (S2), and outputs operation information corresponding to the charging start operation to the control unit 11. When operation information corresponding to the charging start operation is input from the second operation unit 33 to the control unit 11, the control unit 11 causes the sequence circuit unit 15 to output an "operation start / stop 1" signal to the electric vehicle 60 (S3).

[0063] When the communication unit 63 of the electric vehicle 60 receives the "operation start / stop 1" signal from the sequence circuit unit 15, the control circuit of the electric vehicle 60 starts the charging sequence on the electric vehicle 60 side. Also, CAN communication starts between the CAN communication unit 16 of the charging system 1 and the communication unit 63 of the electric vehicle 60 (S4, S5). Then, through the CAN communication between the CAN communication unit 16 and the communication unit 63, the acquisition unit 111 acquires charging parameters such as the total battery capacity, the upper limit value of battery endurance, the CHAdeMO management number, and the V2H management number from the electric vehicle 60 (S6). Further, the acquisition unit 111 may acquire the first response time from when the "operation start / stop 1" signal is output until CAN communication starts as a charging parameter.

[0064] When the charging preparation on the electric vehicle 60 side is completed, the control circuit of the electric vehicle 60 outputs a preparation completion signal from the communication unit 63 to the sequence circuit unit 15 (S7).

[0065] When the sequence circuit unit 15 receives a preparation completion signal (such as an "operation permission / prohibition signal") from the electric vehicle 60, the control unit 11 of the charging device 10 causes the lock unit 19 to hold the connection state in which the vehicle coupler 20 is connected to the vehicle inlet 61 (S8), and prohibits the removal of the vehicle coupler 20. Also, after the control unit 11 of the charging device 10 confirms the open state of the contactor 64 of the electric vehicle 60, it confirms whether there is no insulation failure or the like (S9). As a result of the insulation diagnosis, if there is no insulation failure or the like, the control unit 11 causes the sequence circuit unit 15 to output an "operation start / stop 2" signal to the electric vehicle 60 (S10).

[0066] When the communication unit 63 of the electric vehicle 60 receives the "Operation Start / Stop 2" signal from the sequence circuit unit 15, the control circuit of the electric vehicle 60 closes the contactor 64 (S11), and then causes the communication unit 63 to transmit information such as a charging current command value to the charging device 10 (S12). Here, through the CAN communication between the CAN communication unit 16 and the communication unit 63, the acquisition unit 111 acquires the charging current command value as a charging parameter from the electric vehicle 60. Further, the acquisition unit 111 may acquire, as a charging parameter, the second response time from when the "Operation Start / Stop 2" signal is output until the closing of the contactor 64 is confirmed. Note that it is not essential for the acquisition unit 111 to acquire all of the total battery capacity, the battery endurance upper limit value, the CHAdeMO management number, the V2H management number, the charging current command value, the first response time, and the second response time as charging parameters. The acquisition unit 111 only needs to acquire at least one of the total battery capacity, the battery endurance upper limit value, the CHAdeMO management number, the V2H management number, the charging current command value, the first response time, and the second response time as a charging parameter.

[0067] When the acquisition unit 111 acquires a charging parameter in the process from step S1 to S12, the determination unit 112 determines whether the charging parameter acquired by the acquisition unit 111 matches the permitted parameter stored in the storage unit 17 (S13). Note that when permitted parameters corresponding to a plurality of permitted vehicles are stored in the storage unit 17, the determination unit 112 determines that the charging parameter matches the permitted parameter if the charging parameter acquired by the acquisition unit 111 matches any of the plurality of permitted parameters. Also, when permitted parameters corresponding to a plurality of permitted vehicles are stored in the storage unit 17, the determination unit 112 determines that the charging parameter does not match the permitted parameter if the charging parameter acquired by the acquisition unit 111 does not match any of the plurality of permitted parameters.

[0068] In the determination process of step S13, when the charging parameter acquired by the acquisition unit 111 matches the permitted parameter, the control unit 11 controls the inverter 12 and the DC / DC converter 13 to supply a charging current to the storage battery 62 to charge the storage battery 62 (S14). After that, when a predetermined charging end time arrives, the control unit 11 causes the sequence circuit unit 15 to notify the electric vehicle 60 of the charging stop (S15). The acquisition unit 111 of the charging device 10, together with the charging stop notification, controls the inverter 12 and the DC / DC converter 13 to stop the power supply to the storage battery 62 (S16). When the communication unit 63 of the electric vehicle 60 receives the charging stop notification, the control circuit of the electric vehicle 60 starts the end process of the charging sequence on the electric vehicle 60 side and notifies the charging device 10 of the start of the end process of the charging sequence (S17).

[0069] Also, when the control circuit of the electric vehicle 60 starts the end process of the charging sequence, it determines whether the contactor 64 is welded. If the contactor 64 is not welded, it opens the contactor 64 (S18).

[0070] When the voltage of the power line 71 drops below a predetermined threshold voltage, the control unit 11 of the charging device 10 determines that the contactor 64 of the electric vehicle 60 has opened and releases the locked state of the vehicle coupler 20 by the locking unit 19 (S19). When the locked state of the vehicle coupler 20 by the locking unit 19 is released, the vehicle coupler 20 can be removed. When the user removes the vehicle coupler 20 from the vehicle inlet 61, the electric vehicle 60 can be moved.

[0071] In the determination process of step S13, if the charging parameters acquired by the acquisition unit 111 do not match the permitted parameters, the control unit 11 of the charging device 10 does not permit power supply from the charging device 10 to the electric vehicle 60. When the charging parameters acquired by the acquisition unit 111 do not match the permitted parameters, it can be determined that the electric vehicle 60 to which the vehicle coupler 20 is connected is of a type different from the permitted vehicle. When the charging parameters acquired by the acquisition unit 111 do not match the permitted parameters, the control unit 11 of the charging device 10 does not permit power supply from the charging device 10 to the electric vehicle 60, so the possibility of power supply from the charging device 10 to the electric vehicle 60 for which charging is not permitted can be reduced. Therefore, in the charging system 1 of the present embodiment, power theft by a third party other than a legitimate user who has permitted charging can be suppressed.

[0072] Also, as a result of the determination process, when the charging parameters do not match the permitted parameters, the control unit 11 may maintain the locked state of the lock unit 19. Thereby, the charging system 1 can suppress the electric vehicle 60 attempting to steal power from escaping. Further, when it is known that the vehicle coupler 20 is locked by the lock unit 19 and cannot be removed when attempting to steal power, there is also a deterrent effect of causing a third party attempting to steal power to give up stealing power.

[0073] In the determination process of step S13, the determination unit 112 determines whether the charging parameters acquired by the acquisition unit 111 from the electric vehicle 60 match the permitted parameters. Here, the charging parameters used by the determination unit 112 for determination are one or more of the total battery capacity, the upper limit value of battery endurance, the upper limit value of charging voltage, the lower limit value of discharge voltage, the charging current command value, the CHAdeMO management number, the V2H management number, the first response time, and the second response time.

[0074] In addition, when the charging parameter used in the determination process is a CHAdeMO management number or a V2H management number, the determination unit 112 may determine whether the CHAdeMO management number or the V2H management number acquired from the electric vehicle 60 exactly matches the CHAdeMO management number or the V2H management number set as the permission parameter.

[0075] On the other hand, when the charging parameter used in the determination process is data whose value can vary, such as the total battery capacity, the upper limit value of battery endurance, the upper limit value of charging voltage, the lower limit value of discharge voltage, the charging current command value, the first response time, and the second response time, the determination unit 112 may determine that the charging parameter matches the permission parameter if the charging parameter to be determined is within a predetermined range including the permission parameter. That is, in the determination process, the determination unit 112 may determine that the charging parameter matches the permission parameter if the charging parameter acquired from the electric vehicle 60 is within a predetermined range including the permission parameter. When the charging parameter used for the determination target is data whose value can vary, even if the electric vehicle 60 connected to the vehicle coupler 20 is a permitted vehicle, the charging parameter acquired from the electric vehicle 60 may not exactly match the permission parameter. Even in this case, by the determination unit 112 determining whether the charging parameter acquired from the electric vehicle 60 is within a predetermined range, it is possible to more reliably determine whether the electric vehicle 60 connected to the vehicle coupler 20 is a permitted vehicle.

[0076] For example, assuming that the permission parameter is A and the variation value of the permission parameter is α, if the charging parameter B obtained from the electric vehicle 60 satisfies the relationship of (A - α) ≤ B ≤ (A + α), the determination unit 112 determines that the charging parameter matches the permission parameter. Here, when the total battery capacity is used as the charging parameter, the variation value α is preferably set to the estimated deterioration value of the total battery capacity during the longest non-connection period (for example, a period of about one month) when the electric vehicle 60 is not connected to the charging device 10. Further, when the charging parameter is the first response time or the second response time, the variation value α may be set to the longest response time that can theoretically occur. For example, the variation value α may be set to the time obtained by adding the response times of the circuit components provided in the electric vehicle 60 and the charging device 10 to the communication cycle between the electric vehicle 60 and the charging device 10.

[0077] In addition, the charging system 1 of the present embodiment includes a second operation unit 33 as an operation unit that receives an instruction to start charging the electric vehicle 60 to which the vehicle coupler 20 is connected. When the operation unit (second operation unit 33) receives the start instruction, the determination unit 112 performs a determination process. As a result, triggered by the user operating the operation unit (second operation unit 33) to input a start instruction, the determination unit 112 performs a determination process to determine whether the electric vehicle 60 connected to the vehicle coupler 20 is a permitted vehicle. Note that the user may operate the first operation unit 31, which is an operation unit provided inside the facility 100, to input a start instruction. When the first operation unit 31 receives the start instruction, the determination unit 112 may start a determination process based on the operation information input from the first operation unit 31.

[0078] When the second response time is not used, the determination process in step S13 shown in FIG. 2 may be performed before step S8. In this case, a determination can be made at an earlier stage from the start of the charging operation. Further, the second response time may be defined as the time from when the "operation start / stop 1" signal is output until the "operation permission / prohibition signal" indicating the completion of the preparation of the electric vehicle 60 is confirmed, and the determination process may be performed prior to the lock control in step S8.

[0079] Also, in the present embodiment, the DC power supply unit (for example, the DC / DC converter 13) can perform bidirectional power conversion operations, including a charging operation of supplying DC power to the storage battery 62 to charge the storage battery 62 and a discharging operation of converting the DC power discharged from the storage battery 62 and supplying it to loads within the facility. When the vehicle coupler 20 is connected to the vehicle inlet 61 of the electric vehicle 60 and the user operates the first operation unit 31 or the second operation unit 33 to instruct the start of the discharging operation, the control unit 11 can control the inverter 12 and the DC / DC converter 13 to convert the DC power supplied from the storage battery 62 into AC power and supply it to the load 41 via the distribution board 40. Here, when the control unit 11 causes the DC power supply unit (for example, the DC / DC converter 13 in the present embodiment) to perform the discharging operation, the determination unit 112 does not perform the determination process, and it is only necessary for the control unit 11 to permit the discharging operation of the DC power supply unit. When the DC / DC converter 13, which is the DC power supply unit, performs the discharging operation, power is supplied from the storage battery 62 of the electric vehicle 60, so there is no power theft from the facility 100. For example, in the event of a power outage due to a disaster or the like, an electric vehicle 60 of a public institution such as a local government or an electric vehicle 60 used by a third party other than the user of the facility 100 may be connected to the charging device 10, and power may be supplied from the electric vehicle 60 to the facility 100 via the charging device 10. Therefore, when the control unit 11 causes the DC power supply unit (DC / DC converter 13) to perform the discharging operation, even if the first operation unit 31 or the second operation unit 33 is operated to instruct the start of the discharging operation and the vehicle coupler 20 is connected to the vehicle inlet 61, the determination unit 112 does not perform the determination process, and the control unit 11 only needs to permit the discharging operation of the DC power supply unit. In this way, when the control unit 11 causes the DC power supply unit to perform the discharging operation, the determination unit 112 does not perform the determination process, and since the control unit 11 permits the discharging operation by the DC power supply unit, the time required until the DC / DC converter 13 and the inverter 12 start the discharging operation can be shortened.

[0080] In addition, the charging system 1 of the present embodiment further includes an operation unit (the first operation unit 31 in the present embodiment) disposed inside the facility 100. The operation unit (the first operation unit 31) receives an instruction to start charging the electric vehicle 60 to which the vehicle coupler 20 is connected. When the first operation unit 31, which is the operation unit, receives the start instruction, the determination unit 112 does not perform the determination process, and the control unit 11 permits the DC power supply unit (for example, the DC / DC converter 13 in the present embodiment) to supply DC power. Since the user who operates the first operation unit 31 disposed inside the facility 100 is a user permitted to enter the facility 100, there is a high possibility that the user is the user of the electric vehicle 60 permitted to be charged by the charging system 1. Therefore, when the first operation unit 31, which is the operation unit, receives the start instruction, the determination unit 112 does not perform the determination process, the control unit 11 permits the DC / DC converter 13 to supply DC power, and the time required until the DC / DC converter 13 starts supplying DC power can be shortened.

[0081] Also, in the determination process, when the charging parameter acquired by the acquisition unit 111 from the electric vehicle 60 does not match the permitted parameter, the control unit 11 causes the display unit 32 to display a selection screen. The selection screen is a screen for selecting whether to perform a setting process of setting the charging parameter acquired from the electric vehicle 60 as the permitted parameter. When the operation unit (for example, the first operation unit 31 of the operation terminal 30) receives an instruction to perform the setting process while the display unit 32 is displaying the selection screen, the control unit 11 may set the charging parameter acquired from the electric vehicle 60 as the permitted parameter. When the user wants to add a new electric vehicle 60 as a permitted vehicle, the user may input an instruction to perform the setting process using the first operation unit 31 while the selection screen is being displayed on the display unit 32. When the first operation unit 31 receives an instruction to perform the setting process, the control unit 11 sets the charging parameter acquired from the electric vehicle 60 as the permitted parameter, so that a new electric vehicle 60 can be added to the permitted vehicles.

[0082] Also, when the operation unit (for example, the first operation unit 31 in this embodiment) receives an instruction to perform setting processing, the control unit 11 causes the display unit 32 to display a selection screen for selecting whether to delete the already set permission parameters. When the operation unit (the first operation unit 31) receives an instruction to delete the already set permission parameters, the control unit 11 deletes the instructed permission parameters. One or more already set permission parameters are displayed on the selection screen. When the user uses the operation unit (the first operation unit 31) to perform an operation of selecting a permission parameter to be deleted from among the one or more permission parameters displayed on the selection screen, the control unit 11 deletes the selected permission parameter. When the user switches from the previously used electric vehicle 60 to a new electric vehicle 60, by inputting an instruction to delete the permission parameters using the operation unit 31, the permission parameters of the previously used electric vehicle 60 can be deleted. Thereby, the possibility of misjudging an electric vehicle 60 of the same type as the previously used electric vehicle 60 as a permitted vehicle can be reduced, and the possibility of power theft occurring can be reduced. Also, when the first operation unit 31 receives an instruction to perform setting processing, since the control unit 11 causes the display unit 32 to display a selection screen for selecting whether to delete the already set permission parameters, there is also an advantage that it is possible to prevent forgetting to delete the permission parameters that are no longer used.

[0083] Note that the control unit 11 may obtain one or more charging parameters corresponding to one or more permitted vehicles from a server 200 that stores the charging parameters of multiple types of electric vehicles 60, and set the obtained charging parameters as permitted parameters. The charging parameters of multiple types of electric vehicles 60 are registered in the server 200. The operating entity of the server 200 may be an operator that provides the charging service of the charging system 1, a manufacturer of the charging device 10, or a user community of the facility 100 where the charging system 1 is installed. For example, when the user operates the first operation unit 31 to input the type of a new electric vehicle 60 (such as vehicle model, type, model year, production lot, etc.), the first operation unit 31 outputs type information indicating the type of the new electric vehicle 60 to the control unit 11. When the type information is input from the first operation unit 31, the control unit 11 obtains the charging parameters of the electric vehicle 60 corresponding to the type information from the server 200, and stores the obtained charging parameters in the storage unit 17 as permitted parameters.

[0084] Thereby, when it is desired to add a new electric vehicle 60 to the permitted vehicles, before connecting the vehicle coupler 20 to the vehicle inlet 61 of the new electric vehicle 60, the charging parameters of the new electric vehicle 60 can be preset as permitted parameters. Therefore, even in the state before the new electric vehicle 60 is delivered, the charging parameters of the new electric vehicle 60 can be registered as permitted parameters, and once the new electric vehicle 60 is delivered, it can be charged by the charging device 10 immediately.

[0085] (3) Modification The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be variously modified according to design and the like as long as the object of the present disclosure can be achieved. Further, functions similar to those of the charging system 1 may be embodied by a control method of the charging system 1, a computer program, or a non-transitory recording medium recording the program. The control method according to one aspect is a control method of the charging system 1. The charging system 1 includes a DC power supply unit (for example, a DC / DC converter 13 in this embodiment) capable of supplying DC power to the storage battery 62 of the electric vehicle 60 via the power line 71 in a state where the vehicle coupler 20 connected to the charging cable 70 including the power line 71 and the communication line 72 is connected to the vehicle inlet 61 of the electric vehicle 60 existing in the parking space 101 of the facility 100. The control method includes an acquisition step and a determination step. In the acquisition step, while the vehicle coupler 20 is connected to the vehicle inlet 61, charging parameters related to charging of the storage battery 62 are acquired from the electric vehicle 60 by communicating with the electric vehicle 60 via the communication line 72. In the determination step, it is determined whether to permit charging of the electric vehicle 60 by comparing the charging parameters acquired in the acquisition step with permission parameters that are charging parameters of one or more permitted vehicles for which permission to supply DC power from the DC power supply unit is permitted. In the determination step, when the charging parameters match the permission parameters, permission to supply DC power from the DC power supply unit to the storage battery 62 is permitted. In the determination step, when the charging parameters do not match the permission parameters, supply of DC power from the DC power supply unit to the storage battery is not permitted. A (computer) program according to one aspect is a program for causing a computer system to execute the above control method.

[0086] Hereinafter, modified examples of the above embodiment will be listed. The modified examples described below can be applied in appropriate combinations.

[0087] The subject of execution of the charging system 1 or the control method of the charging system 1 in the present disclosure includes a computer system. The computer system is mainly composed of a processor and a memory as hardware. The processor executes a program recorded in the memory of the computer system, thereby realizing the function of the subject of execution of the charging system 1 or the control method of the charging system 1 in the present disclosure. The program may be pre-recorded in the memory of the computer system, may be provided through an electric communication line, or may be provided by being recorded in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large scale integrated circuit (LSI). The integrated circuits such as ICs and LSIs are called by different names depending on the degree of integration, and include integrated circuits called system LSIs, VLSIs (Very Large Scale Integration), or ULSIs (Ultra Large Scale Integration). Furthermore, a field-programmable gate array (FPGA) that is programmed after the manufacture of the LSI, or a logic device that can reconfigure the connection relationship inside the LSI or reconfigure the circuit partition inside the LSI, can also be adopted as a processor. The electronic circuits may be integrated in one chip or distributed among multiple chips. The chips may be integrated in one device or distributed among multiple devices. The computer system includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0088] Moreover, it is not an essential configuration of the charging system 1 that a plurality of functions in the charging system 1 are integrated in one housing, and the components of the charging system 1 may be provided dispersedly in a plurality of housings. Further, at least some functions of the charging system 1 may be realized by a cloud (cloud computing) or the like.

[0089] Conversely, in Embodiment 1, at least some functions of the charging system 1 that are dispersed in a plurality of devices may be integrated in one housing.

[0090] In the charging system 1 of the above embodiment, the determination unit 112 may perform a determination process when the vehicle coupler 20 is connected to the vehicle inlet 61. When the user connects the vehicle coupler 20 to the vehicle inlet 61, the sequence circuit unit 15 outputs operation information regarded as a charging start operation to the control unit 11 by detecting the conduction of the first communication line 73 from the voltage level of the connector connection signal. When the operation information regarded as a charging start operation is input from the sequence circuit unit 15, the control unit 11 causes the determination unit 112 to perform a determination process, so that the charging sequence can be started without the user performing a charging start operation using the second operation unit 33. As a result, the determination unit 112 starts the determination process, which has the advantage that the user does not need to perform an operation to start the determination process.

[0091] In the charging system 1 of the above embodiment, in the determination process, the determination unit 112 may determine whether or not a first hash value obtained by hashing the charging parameters acquired from the electric vehicle 60 matches a second hash value obtained by hashing the permission parameters.

[0092] When the control unit 11 acquires the permission parameters, which are the charging parameters of the permitted vehicle, it causes the storage unit 17 to store the second hash value obtained by hashing the permission parameters. The determination unit 112 obtains the first hash value obtained by hashing the charging parameters acquired by the acquisition unit 111 in the determination process. Then, the determination unit 112 compares the first hash value with the second hash value stored in the storage unit 17, and determines whether the electric vehicle 60 is a permitted vehicle based on whether the first hash value matches the second hash value. Here, the storage unit 17 of the charging device 10 only needs to store the second hash value obtained by hashing the permission parameters. Since the data volume of the second hash value is smaller than that of the permission parameters, the required storage capacity of the storage unit 17 can be reduced compared to the case where the permission parameters are stored in the storage unit 17. Also, in order to improve the determination accuracy of the determination process, even when the determination unit 112 increases the number of charging parameters used in the determination process, there is an effect that the storage capacity of the storage unit 17 required to store a plurality of second hash values can be reduced.

[0093] In the above embodiment, the control unit 11 may update the value of the permission parameters by setting, as the permission parameters, the charging parameters acquired from the electric vehicle 60 to which the vehicle coupler 20 is connected to the vehicle inlet 61 at a predetermined update timing.

[0094] For example, when the charging parameters are data that change over time, such as the total battery capacity, it is preferable to update the permission parameters. The control unit 11 may set, as the permission parameters, the charging parameters acquired from the electric vehicle 60 at a predetermined update timing (for example, the timing immediately before the end of charging) during charging of the electric vehicle 60. By updating the value of the permission parameters, the possibility that the determination unit 112 erroneously determines that the electric vehicle 60, which is a permitted vehicle, is not a permitted vehicle can be reduced.

[0095] Also, in the above embodiment, one or more permitted vehicles that can use the charging by the charging system 1 may be set for each of a plurality of time zones. That is, in the storage unit 17, one or more permitted vehicles may be set for each of the plurality of time zones. The one or more permitted vehicles set for each time zone may be the same or different from each other. And the determination unit 112 determines, in the determination process, whether the charging parameters acquired from the electric vehicle 60 match the permission parameters of one or more permitted vehicles set for the time zone including the determination time point at which the determination process is performed. Since the charging system 1 sets one or more permitted vehicles for each of the plurality of time zones, it is possible to set permitted vehicles that can use charging in each time zone so that a plurality of users use the charging system 1 by dividing the time zones they use.

[0096] (Summary) From the embodiments and the like described above, the following aspects are disclosed.

[0097] The charging system (1) of the first aspect is a charging system (1) for charging the battery (62) of the electric vehicle (60) present in the parking space (101) of the facility (100). The charging system (1) includes a DC power supply unit (13), a communication unit (14), and a control unit (11). The DC power supply unit (13) can supply DC power to the battery (62) of the electric vehicle (60) via the power line (71) when the vehicle coupler (20) connected to the charging cable (70) including the power line (71) and the communication line (72) is connected to the vehicle inlet (61) of the electric vehicle (60). The communication unit (14) can communicate with the electric vehicle (60) via the communication line when the vehicle coupler (20) is connected to the vehicle inlet. The control unit (11) controls the operations of the DC power supply unit (13) and the communication unit (14). The control unit (11) has an acquisition unit (111) and a determination unit (112). The acquisition unit (111) acquires charging parameters related to the charging of the battery (62) from the electric vehicle (60) by causing the communication unit (14) to communicate with the electric vehicle (60) via the communication line (72). The determination unit (112) performs a determination process of determining whether to permit the charging of the electric vehicle (60) to which the vehicle coupler (20) is connected by comparing the charging parameters acquired by the acquisition unit (111) with the permitted parameters, which are the charging parameters of one or more permitted vehicles for which charging by the charging system is permitted. When the charging parameters match the permitted parameters, the determination unit (112) permits the supply of DC power from the DC power supply unit (13) to the battery (62). When the charging parameters do not match the permitted parameters, the determination unit (112) does not permit the supply of DC power from the DC power supply unit (13) to the battery (62).

[0098] According to this aspect, the determination unit (112) performs the determination process by comparing the charging parameters acquired from the electric vehicle (60) with the permitted parameters. Since the charging parameters are not information corresponding to personal information, the electric vehicle (60) can be authenticated without using information corresponding to personal information. Since the charging parameters are not information corresponding to personal information, there is no need for security measures for preventing leakage of the charging parameters, and there is also an advantage that the installation cost of the charging system (1) can be reduced.

[0099] The charging system (1) of the second aspect further includes an operation unit (31, 33) that receives an instruction to start charging the electric vehicle (60) to which the vehicle coupler (20) is connected in the first aspect. When the operation unit (31, 33) receives the start instruction, the determination unit (112) performs a determination process.

[0100] According to this aspect, when the user operates the operation unit (31, 33) to input a start instruction as a trigger, the determination unit (112) performs a determination process to determine whether the electric vehicle (60) connected to the vehicle coupler (20) is an authorized vehicle.

[0101] In the charging system (1) of the third aspect, in the first or second aspect, when the vehicle coupler (20) is connected to the vehicle inlet (61), the determination unit (112) performs a determination process.

[0102] According to this aspect, when the user connects the vehicle coupler (20) to the vehicle inlet (61), the determination unit (112) starts the determination process. Therefore, there is an advantage that the user does not need to perform an operation to start the determination process.

[0103] In the charging system (1) of the fourth aspect, in any one of the first to third aspects, the DC power supply unit (13) can perform a bidirectional power conversion operation including a charging operation of supplying DC power to the storage battery (62) to charge the storage battery (62) and a discharging operation of converting the DC power discharged from the storage battery (62) and supplying it to a load in the facility. When the control unit (11) causes the DC power supply unit (13) to perform a discharging operation, the determination unit (112) does not perform a determination process, and the control unit (11) permits the discharging operation of the DC power supply unit (13).

[0104] When the DC power supply unit (13) performs a discharging operation, since power is supplied from the storage battery (62) of the electric vehicle (60), there is no possibility that the power of the facility (100) is used by a third party who is not permitted to use the power of the facility (100). According to the fourth aspect, by omitting the determination process by the determination unit (112), the time required until the DC power supply unit (13) starts the discharging operation can be shortened.

[0105] The charging system (1) according to the fifth aspect further includes an operation unit (31) disposed inside the facility (100) and configured to receive an instruction to start charging the electric vehicle (60) to which the vehicle coupler (20) is connected, in any of the first to fourth aspects. When the operation unit (31) receives the start instruction, the determination unit (112) does not perform the determination process, and the control unit (11) permits the DC power supply unit (13) to supply DC power.

[0106] Since the user who operates the operation unit (31) disposed inside the facility (100) is a user permitted to enter the inside of the facility (100), there is a high possibility that the user is the user of the electric vehicle (60) permitted to charge by the charging system (1). Therefore, when the operation unit (31) receives the start instruction, the determination unit (112) does not perform the determination process, the control unit (11) permits the DC power supply unit (13) to supply DC power, and the time required until the DC power supply unit (13) starts supplying DC power can be shortened.

[0107] The charging system (1) according to the sixth aspect further includes a display unit (32) in the fifth aspect. In the determination process, when the charging parameters acquired by the acquisition unit (111) from the electric vehicle (60) do not match the permitted parameters, the control unit (11) causes the display unit (32) to display a selection screen. The selection screen is a screen for selecting whether to perform a setting process of setting the charging parameters acquired from the electric vehicle (60) as the permitted parameters. When the operation units (31, 33) receive an instruction to perform the setting process, the control unit (11) sets the charging parameters acquired from the electric vehicle (60) as the permitted parameters.

[0108] According to this aspect, when it is desired to add a new electric vehicle (60) to the permitted vehicles, in a state where a selection screen is being displayed on the display unit (32), the user may input an instruction to perform a setting process using the operation unit (31). When the operation unit (31) receives an instruction to perform a setting process, the control unit (11) sets the charging parameters acquired from the electric vehicle (60) as permitted parameters, so that a new electric vehicle (60) can be added to the permitted vehicles.

[0109] In the charging system (1) of the seventh aspect, in the sixth aspect, when the operation unit (31) receives an instruction to perform a setting process, the control unit (11) causes the display unit (32) to display a selection screen for selecting whether to delete the already set permitted parameters. When the operation unit (31) receives an instruction to delete the already set permitted parameters, the control unit (11) deletes the instructed permitted parameters.

[0110] According to this aspect, when the user switches from an electric vehicle (60) previously used to a new electric vehicle (60), by inputting an instruction to delete the permitted parameters using the operation unit (31), the unused permitted parameters can be deleted.

[0111] In the charging system (1) of the eighth aspect, in any of the first to seventh aspects, the control unit (11) acquires the charging parameters of one or more electric vehicles (60) corresponding to one or more permitted vehicles from a server that stores the charging parameters of a plurality of types of electric vehicles (60), and sets the acquired charging parameters as permitted parameters.

[0112] According to this aspect, when it is desired to add a new electric vehicle (60) to the permitted vehicles, before connecting the vehicle coupler (20) to the vehicle inlet (61) of the new electric vehicle (60), the charging parameters of the new electric vehicle (60) can be preset as permitted parameters.

[0113] In the charging system (1) of the ninth aspect, in any of the first to eighth aspects, in the determination process, the determination unit (112) determines whether or not a first hash value obtained by hashing the charging parameters acquired from the electric vehicle (60) matches a second hash value obtained by hashing the permission parameters.

[0114] According to this aspect, the charging system (1) only needs to store the second hash value obtained by hashing the permission parameters. Since the data amount of the second hash value is smaller than that of the permission parameters, the storage capacity required to store the second hash value can be reduced compared to the case of storing the permission parameters.

[0115] In the charging system (1) of the tenth aspect, in any of the first to ninth aspects, in the determination process, if the charging parameters acquired from the electric vehicle (60) are within a predetermined range including the permission parameters, the determination unit (112) determines that the charging parameters match the permission parameters.

[0116] According to this aspect, even if the charging parameters are values that vary over time, as long as the charging parameters are within a predetermined range, it is determined that the charging parameters match the permission parameters. Therefore, it is possible to more reliably determine whether the electric vehicle (60) connected to the vehicle coupler (20) is a permitted vehicle.

[0117] In the charging system (1) of the eleventh aspect, in the tenth aspect, the control unit (11) updates the value of the permission parameters by setting, at a predetermined update timing, the charging parameters acquired from the electric vehicle (60) to which the vehicle coupler (20) is connected to the vehicle inlet (61) as the permission parameters.

[0118] According to this aspect, even if the charging parameters are data that change over time, by updating the value of the permission parameters, the possibility that the determination unit (112) misjudges an electric vehicle (60) that is a permitted vehicle as not a permitted vehicle can be reduced.

[0119] In the charging system (1) according to the twelfth aspect, in any of the first to eleventh aspects, the charging system (1) further includes a locking unit (19) that locks the vehicle coupler (20) in a state where the vehicle coupler (20) is connected to the vehicle inlet (61). As a result of the determination process, when the charging parameter does not match the permitted parameter, the control unit (11) maintains the locked state of the vehicle coupler (20) by the locking unit (19).

[0120] According to this aspect, the charging system (1) can suppress the electric vehicle (60) attempting to steal electricity from escaping.

[0121] In the charging system (1) according to the thirteenth aspect, in any of the first to twelfth aspects, one or more permitted vehicles are set for each of a plurality of time zones. In the determination process, the determination unit (112) determines whether the charging parameter acquired from the electric vehicle (60) matches the permitted parameter of one or more permitted vehicles that permit the supply of DC power from the DC power supply unit (13) in the time zone including the determination time point at which the determination process is performed.

[0122] According to this aspect, by setting one or more permitted vehicles for each of the plurality of time zones, a plurality of users can use the charging system (1) by dividing the time zones for use.

[0123] The control method of the 14th aspect is a control method of a charging system (1). The charging system (1) includes a DC power supply unit (13) capable of supplying DC power to a storage battery (62) of an electric vehicle (60) via a power line (71) in a state where a vehicle coupler (20) connected to a charging cable (70) including the power line (71) and a communication line (72) is connected to a vehicle inlet (61) of the electric vehicle (60) existing in a parking space (101) of a facility (100). The control method includes an acquisition step and a determination step. In the acquisition step, while the vehicle coupler (20) is connected to the vehicle inlet (61), charging parameters related to charging of the storage battery (62) are acquired from the electric vehicle (60) by communicating with the electric vehicle (60) via the communication line (72). In the determination step, it is determined whether to permit charging of the electric vehicle (60) by comparing the charging parameters acquired in the acquisition step with permission parameters that are charging parameters of one or more permitted vehicles for which permission to supply DC power from the DC power supply unit (13) is permitted. In the determination step, when the charging parameters match the permission parameters, permission to supply DC power from the DC power supply unit (13) to the storage battery (62) is permitted. In the determination step, when the charging parameters do not match the permission parameters, supply of DC power from the DC power supply unit (13) to the storage battery (62) is not permitted.

[0124] According to this aspect, determination processing is performed by comparing the charging parameters acquired from the electric vehicle (60) with the permission parameters. Since the charging parameters are not information equivalent to personal information, the electric vehicle (60) can be authenticated without using information equivalent to personal information. Since the charging parameters are not information equivalent to personal information, there is also an advantage that security measures for preventing leakage of the charging parameters are not required, and the installation cost of the charging system (1) can be reduced.

[0125] Not limited to the above aspect, various configurations (including modified examples) of the charging system (1) according to the above embodiment can be embodied by a control method of the charging system (1), a (computer) program, or a non-temporary recording medium on which the program is recorded, etc.

[0126] Regarding the configurations according to the second to thirteenth aspects, they are not essential configurations of the charging system (1) and can be omitted as appropriate.

Explanation of Signs

[0127] 1 Charging system 11 Control unit 13 DC / DC converter (DC power supply unit) 14 Communication unit 19 Locking unit 20 Vehicle coupler 31 First operation unit (operation unit) 32 Display unit 33 Second operation unit (operation unit) 60 Electric vehicle 61 Vehicle inlet 62 Storage battery 70 Charging cable 71 Power line 72 Communication line 101 Parking space 111 Acquisition unit 112 Judgment unit

Claims

1. A charging system for charging a battery of an electric vehicle existing in a parking space of a facility, comprising: A DC power supply unit capable of supplying DC power to the battery of the electric vehicle via a power line, with a vehicle coupler connected to a charging cable including the power line and a communication line being connected to a vehicle inlet of the electric vehicle; A communication unit capable of communicating with the electric vehicle via the communication line when the vehicle coupler is connected to the vehicle inlet; A control unit for controlling operations of the DC power supply unit and the communication unit; The control unit: An acquisition unit that acquires charging parameters related to charging of the battery from the electric vehicle by causing the communication unit to communicate with the electric vehicle via the communication line; A determination unit that performs a determination process of determining whether to permit charging of the electric vehicle to which the vehicle coupler is connected by comparing the charging parameters acquired by the acquisition unit with permitted parameters that are the charging parameters of one or more permitted vehicles for which charging by the charging system is permitted; The determination unit: Permits supply of DC power from the DC power supply unit to the battery when the charging parameters match the permitted parameters; Does not permit supply of DC power from the DC power supply unit to the battery when the charging parameters do not match the permitted parameters. Charging system.

2. The charging system according to claim 1, further comprising an operation unit that receives an instruction to start charging the electric vehicle to which the vehicle coupler is connected; The determination unit performs the determination process when the operation unit receives the start instruction. The charging system according to claim 1.

3. The charging system according to claim 1, wherein the determination unit performs the determination process when the vehicle coupler is connected to the vehicle inlet. The charging system according to claim 1.

4. The DC power supply unit is capable of bidirectional power conversion operations, including a charging operation of supplying DC power to the battery to charge the battery and a discharging operation of converting DC power discharged from the battery and supplying it to a load within the facility; When the control unit causes the DC power supply unit to perform the discharging operation, the determination unit does not perform the determination process and the control unit permits the discharging operation of the DC power supply unit. The charging system according to claim 1.

5. The charging system according to claim 1, further comprising an operation unit disposed inside the facility that receives an instruction to start charging the electric vehicle to which the vehicle coupler is connected. When the operation unit receives the start instruction, the determination unit does not perform the determination process, and the control unit permits the DC power supply unit to supply DC power. The charging system according to claim 1.

6. Further comprising a display unit, In the determination process, when the charging parameters acquired by the acquisition unit from the electric vehicle do not match the permitted parameters, The control unit causes the display unit to display a selection screen for selecting whether to perform a setting process of setting the charging parameters acquired from the electric vehicle as the permitted parameters, When the operation unit receives an instruction to perform the setting process, the control unit sets the charging parameters acquired from the electric vehicle as the permitted parameters. The charging system according to claim 5.

7. When the operation unit receives an instruction to perform the setting process, the control unit causes the display unit to display a selection screen for selecting whether to delete the already set permitted parameters, When the operation unit receives an instruction to delete the already set permitted parameters, the control unit deletes the instructed permitted parameters. The charging system according to claim 6.

8. The control unit acquires the charging parameters of one or more electric vehicles corresponding to the one or more permitted vehicles from a server that stores the charging parameters of a plurality of types of electric vehicles, and sets the acquired charging parameters as the permitted parameters. The charging system according to claim 1.

9. In the determination process, the determination unit determines whether a first hash value obtained by hashing the charging parameters acquired from the electric vehicle matches a second hash value obtained by hashing the permitted parameters. The charging system according to claim 1.

10. In the determination process, if the charging parameters acquired from the electric vehicle fall within a predetermined range including the permitted parameters, the determination unit determines that the charging parameters match the permitted parameters. The charging system according to claim 1.

11. The control unit updates the permitted parameters by setting the charging parameters acquired from the electric vehicle to which the vehicle coupler is connected to the vehicle inlet as the permitted parameters at a predetermined update timing. The charging system according to claim 10.

12. The vehicle coupler further includes a locking unit that locks the vehicle coupler in a state where the vehicle coupler is connected to the vehicle inlet. As a result of the determination process, when the charging parameter does not match the permission parameter, the control unit maintains the locked state of the vehicle coupler by the locking unit. The charging system according to claim 1.

13. The one or more permitted vehicles are set for each of a plurality of time zones. In the determination process, the determination unit determines whether the charging parameter acquired from the electric vehicle matches the permission parameter of the one or more permitted vehicles set in the time zone including the determination time point at which the determination process is performed. The charging system according to claim 1.

14. A control method for a charging system including a DC power supply unit capable of supplying DC power to a storage battery of an electric vehicle via a power line, in a state where a vehicle coupler connected to a charging cable including the power line and a communication line is connected to a vehicle inlet of the electric vehicle existing in a parking space of a facility, An acquisition step of acquiring, from the electric vehicle, a charging parameter related to charging of the storage battery by communicating with the electric vehicle via the communication line in a state where the vehicle coupler is connected to the vehicle inlet; A determination step of determining whether to permit charging of the electric vehicle by comparing the charging parameter acquired in the acquisition step with a permission parameter that is the charging parameter of one or more permitted vehicles that permit supply of DC power from the DC power supply unit, In the determination step, when the charging parameter matches the permission parameter, permission is given to supply DC power from the DC power supply unit to the storage battery, when the charging parameter does not match the permission parameter, supply of DC power from the DC power supply unit to the storage battery is not permitted. Control method.

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