JP5415398B2 - Electric vehicle charging system and charging method - Google Patents

Description

  The present invention relates to a charging system and a charging method for an electric vehicle, and more particularly, to a technique for appropriately and efficiently charging a plurality of electric vehicles in an environment where power that can be supplied is limited.

  In recent years, development of electric vehicles has been progressing rapidly against the background of environmental problems. Along with this, the development of charging stations necessary for the spread of electric vehicles is being promoted.

  As a technique related to a charging stand, for example, Patent Document 1 discloses a power supply means for supplying power to a battery of an electric vehicle, a charging instruction for the purpose of improving the utilization efficiency of the charging device and suppressing initial cost and operation cost. In a charging system for an electric vehicle including an information input means that enables information to be input, an information display means, a charging terminal, and a control section that sets a usable time of power supply means, the control section provides information on charging reservation information. It is described that the power supply means can be used after it is displayed on the display means and the charge charge is collected by the charge collection means.

  Moreover, even if the power supply capacity of the power supply equipment that supplies power to the charging device is small, Patent Literature 2 allows the existing power supply equipment to be used as it is without performing the construction work of the power supply equipment, leading to the power supply equipment. Charging means that receives power supply from an external power supply and supplies charging current to the battery to allow charging without blowing the breaker even if the user does not check the state of the load, other connected to the external power supply Charging device, detection means for detecting the current supplied from the external power source, information obtaining means for inquiring the charging state information to other charging devices and obtaining the charging state information, the charging device and others from the external power source Represents the upper limit of the total current, which is the sum of the currents that are supplied by the charger. Based on the information, the operating current value that is the current that the charging device can receive from the external power supply is detected by the operating current setting means and detecting means that set the total current so that it does not exceed the total current limit value. It is described that the vehicle battery charging device is provided with a charge control means for controlling the charging means so that the current does not exceed the use current value set by the use current setting means.

JP 2010-28913 A JP 2003-333706 A

  In the future, as electric vehicles become more widespread, it is considered that charging stations will be installed at various locations in the region, such as parking lots at shopping centers and common areas of apartment houses.

  However, depending on the installation environment of the charging station, there may be cases where it is not always possible to secure a dual-purpose power source that meets the expected demand. In such a case, while using limited power effectively, It is necessary to supply electric power appropriately to each of the charging stations so that the electric vehicle is efficiently charged.

  The present invention has been made from such a viewpoint, and provides a charging system and a charging method for an electric vehicle capable of appropriately and efficiently charging a plurality of electric vehicles even in an environment where the power that can be supplied is limited. The purpose is to provide.

The main invention for achieving the above object is to provide a power source for supplying electric power for charging the electric vehicle, a charging facility for charging the electric vehicle with the electric power supplied from the power source, and a supply for each of the charging facilities. And a control device that controls the supply of current from the power source to each of the charging facilities, the control device comprising: When a charge reservation for an electric vehicle is accepted by the facility, and charging is performed for the charging facility reserved for charging to a current value Ir that is a sum of current values currently supplied to each of the charging facilities, the charging facility Whether or not a current value Ir + Δi obtained by adding a maximum charging current Δi that is a maximum current value supplied to the battery is equal to or less than a maximum allowable current Imax that is a maximum current value that can be supplied by the power source If the current value Ir + Δi is less than or equal to the maximum allowable current Imax, supply of current to the charging facility reserved for charging is started, and the current value Ir + Δi exceeds the maximum allowable current Imax. The charging reservation is managed as a standby state, and for each of the charging facilities, the charging duration, which is the time from the start of the supply of current from the power source to each of the charging facilities, is monitored, and the charging is performed. When it is detected that there is the charging facility whose duration exceeds a preset maximum charging duration Tmax, the supply of current from the power source to the charging facility is stopped, and after the stop, the standby state For the charge reservation managed as follows, it is determined whether or not the current value Ir + Δi is less than or equal to the maximum allowable current Imax, and the current value Ir + Δi is the maximum value. If it is permissible current Imax or less and to initiate the supply of current to the charging equipment for said charge reservation being managed.

  According to the present invention, the electric vehicle can be charged by efficiently supplying current to each of the charging facilities within a range where the current value supplied by the power source does not exceed the maximum allowable current Imax. In addition, after starting charging, for charging facilities exceeding the maximum charging duration Tmax, the supply of current is forcibly stopped, and instead charging is automatically started for charging facilities reserved for charging. Then, the charging of the electric vehicle that is subsequently reserved for charging can be started early. As described above, according to the present invention, it is possible to appropriately and efficiently charge a plurality of electric vehicles in an environment where the power that can be supplied is limited.

  Another aspect of the present invention is the above-described charging system, wherein the control device receives an instruction to stop charging the electric vehicle by the charging facility, and the charging facility corresponding to the received instruction. Stop the supply of current from the power source to, and determine whether the current value Ir + Δi is less than or equal to the maximum allowable current Imax for the charge reservation managed as a standby state after the stop, When the current value Ir + Δi is equal to or less than the maximum allowable current Imax, supply of current to the charging facility for the charge reservation being managed is started.

  According to the present invention, when the control device receives an instruction to stop charging and stops the supply of current from a power supply to a certain charging facility, the control device starts supplying current to another charging facility in a standby state. As described above, according to the present invention, when an instruction to stop charging is received, the supply of current to other charging facilities in the standby state is automatically started, so that the electric vehicle that is subsequently reserved for charging. Can be started early. Therefore, it is possible to appropriately and efficiently charge a plurality of electric vehicles even in an environment where the power that can be supplied is limited.

  Another aspect of the present invention is the above-described charging system, in which the control device determines whether charging is completed or not based on the value of the current supplied from the power source to each of the charging facilities. Whether or not the charging end determination value Iend or less, which is a threshold value for determining whether the current is supplied from the power source, is less than or equal to the charging end determination value Iend. If detected, the supply of current from the power supply to the charging facility is stopped, and after the stop, whether the current value Ir + Δi is equal to or less than the maximum allowable current Imax for the charge reservation managed as a standby state If the current value Ir + Δi is less than or equal to the maximum allowable current Imax, supply of current to the charging facility for the charge reservation being managed is started. The

  According to the present invention, when supply of current from the power supply is stopped for a charging facility that has been charged, supply of current to another charging facility that is in a standby state is started. When the supply of current from the power supply is stopped for the charging facility that has been charged in this way, the supply of current to the other charging facilities in the standby state is automatically started, and then the charge is reserved. It is possible to start charging the electric vehicle that is running at an early stage. Therefore, according to the present invention, it is possible to appropriately and efficiently charge a plurality of electric vehicles even in an environment where the power that can be supplied is limited.

Another one of the present invention is the above-described charging system, wherein the control device receives a reservation for charging the electric vehicle by the charging facility, and totals the current values currently supplied to each of the charging facilities. The current value Ir + Δi obtained by adding the maximum charging current Δi, which is the maximum current value supplied to the charging facility when charging is performed for the charging facility reserved for charging, to the current value Ir Is equal to or less than the maximum allowable current Imax, which is the maximum current value that can be supplied, and a value Nr + 1 obtained by adding 1 to the total number Nr of connected charging units, which is the number of charging facilities currently connected to the electric vehicle, is , it is determined whether the charging system is simultaneously chargeable number Nmax below a preset upper limit value of the number of rechargeable electric vehicles simultaneously, the current value Ir + .DELTA.i said maximum allowable collector When Nr + 1 is equal to or less than Imax and Nr + 1 is equal to or less than the simultaneously chargeable number Nmax, supply of current to the charging facility reserved for charging is started, and the current value Ir + Δi is equal to the maximum allowable current Imax. Or the Nr + 1 exceeds the simultaneous chargeable number Nmax, the charge reservation is managed as a standby state, and supply of current from the power source to each of the charging facilities is started. Monitoring the charging duration, which is the time from the start to the present, and detecting that there is the charging facility having the charging duration exceeding a preset maximum charging duration Tmax, The supply of current from the power supply is stopped, and after the stop, the current value I for the charge reservation managed as a standby state It is determined whether r + Δi is equal to or less than the maximum allowable current Imax, and whether Nr + 1 is equal to or less than the simultaneously chargeable number Nmax, the current value Ir + Δi is equal to or less than the maximum allowable current Imax, and Nr + 1 Is less than or equal to the simultaneously chargeable number Nmax, supply of current to the charging facility for the charge reservation being managed is started.

  According to the present invention, the current of the power supply is not exceeding the maximum allowable current Imax, and the charging facility can be efficiently operated within a range in which the total number of currently connected electric vehicles does not exceed the simultaneously chargeable number Nmax. The electric vehicle can be charged by supplying current to each. In addition, after starting charging, for charging facilities exceeding the maximum charging duration Tmax, the supply of current is forcibly stopped, and instead charging is automatically started for charging facilities reserved for charging. Then, the charging of the electric vehicle that is subsequently reserved for charging can be started early. As described above, according to the present invention, it is possible to appropriately and efficiently charge a plurality of electric vehicles even in an environment where the power that can be supplied is limited.

  In addition, the subject which this application discloses, and its solution method are clarified by the column of the form for inventing, and drawing.

  According to the present invention, it is possible to appropriately and efficiently charge a plurality of electric vehicles even in an environment where the power that can be supplied is limited.

1 is a diagram illustrating a schematic configuration of a charging system 1. FIG. It is a figure which shows the vehicle equipment with which the electric vehicle shown as an example of the electric vehicle 2 is provided. It is a figure which shows the hard air structure of the quick charger shown as an example of the charging equipment. 2 is a diagram illustrating a hardware configuration of a measurement control device 50. FIG. It is a figure which shows the main functions with which the measurement control apparatus 50 is provided. FIG. 2 is a diagram showing a hardware configuration of main controller 10. It is a figure which shows the main data with which the main function of the main controller 10 and the main controller 10 are provided. It is a figure which shows an example of the user information management table. 5 is a diagram illustrating an example of a setting information management table 122. FIG. It is a figure which shows an example of the plan maximum charging current management table. It is a figure which shows an example of the stand management table 124 during charge. It is a figure which shows an example of the charge stand management table 125. It is a flowchart explaining operation input reception processing S1300. 5 is a diagram showing an example of an authentication screen 1400. FIG. It is a figure which shows an example of the display content of the status display column 1414. FIG. 5 is a diagram showing an example of a menu screen 1600. FIG. It is a flowchart explaining the detail of charge start process S1322. It is a figure which shows an example of the vehicle type selection screen 1800. It is a flowchart explaining the detail of charge stop process S1324. It is a flowchart explaining the detail of charge stop process S2000. It is a flowchart explaining charge continuation time monitoring process S2100. It is a flowchart explaining charge completion process S2200. It is a figure which shows the specific example of charge control. It is a flowchart explaining the detail of maintenance process S1326. 5 is a diagram illustrating an example of a maintenance screen 2500. FIG.

  FIG. 1 shows a schematic configuration of a charging system 1 described as an embodiment. As shown in the figure, the charging system 1 supplies power to a charging facility 4 (rapid charger, ordinary charger, etc.) (hereinafter also referred to as a stand) for charging the electric vehicle 2 and the charging facility 4. The power supply 3 includes a distribution board 5 that distributes power supplied from the power supply 3 to the charging equipment 4 and a main control device 10 (control device).

  The power source 3 is, for example, a commercial power system (for example, AC 200 V, AC 100 V, etc.), a distributed power source (a micro gas turbine, a fuel cell, a generator using natural energy (solar generator, wind generator, hydroelectric generator, etc.)) ) Etc.

  The distribution board 5 includes a main line 31 to which power from the power source 3 is supplied, a main breaker 32 provided on the main line 31, a plurality of branch lines 33 branching from the main line 31, an earth leakage breaker 34 provided on each branch line 33, and An ammeter 35 provided in the branch line 33, a relay 36 provided in each branch line 33, and a measurement control device 50 (control device) provided in each branch line 33 are provided.

  As shown in the figure, the ammeter 35 and the measurement control device 36 provided in each branch line 33 are connected to a measurement control device 50 provided in the branch line 33 provided respectively. Moreover, all the measurement control apparatuses 50 provided in each branch line 33 are communicably connected to the main control apparatus 10.

  FIG. 2 shows in-vehicle equipment provided in an electric vehicle (EV (Electric Vehicle)) shown as an example of an electric vehicle 2 that is charged by the charging system 1. As shown in the figure, this electric vehicle includes a storage battery 201, a motor 202, an inverter 203, a quick charging connection port 204, a normal charging connection port 205, an in-vehicle charger 206, a BMU 207 (BMU: Battery Management Unit) (voltage A detection unit), an ECU 208 (ECU: Electronic Control Unit), a navigation device 209 ("navigation device" in the figure), and a voltage conversion circuit 210.

  The storage battery 201 is, for example, a lithium ion secondary battery, a lithium ion polymer battery, a metal-air battery, a nickel metal hydride battery, a lead storage battery, or the like. The motor 202 generates motive power for driving the electric vehicle with the energy supplied from the storage battery 201. The inverter 203 converts the DC voltage supplied from the storage battery 201 into an AC voltage necessary for driving the motor 202. The inverter 203 is configured using, for example, a single pulse inverter, a PWM (PWM: Pulse Width Modulation) inverter, or the like.

  When the storage battery 201 is rapidly charged, the charging connector 41 for rapid charging of the charging facility 4 is connected to the quick charging connection port 204. The normal charging connection port 205 is connected to a charging connector 41 for normal charging of the charging facility 4 when the storage battery 201 is normally charged.

  The on-vehicle charger 206 charges the storage battery 201 with power supplied from the charging facility 4. The in-vehicle charger 206 corresponds to a plurality of input voltages, and automatically determines a voltage value supplied from the charging facility 4 and controls charging of the storage battery 201 (CVCC (Constant Voltage) according to the determined voltage value. Charge control by Constant Current).

  The BMU 207 communicates with an in-vehicle charger 206, an ECU 208, and a quick charger (not shown) connected via the quick charging connection port 204 in accordance with a protocol such as CAN (Controller Area Network). The BMU 207 actively or passively monitors and controls an in-vehicle device mounted on the electric vehicle. For example, the BMU 207 monitors the state (terminal voltage, energization current, temperature, etc.) of the cells constituting the storage battery 201 in real time, discharges the storage battery 201, and charges the storage battery 201 with the in-vehicle charger 206 or the quick charger. Control, state diagnosis of the storage battery 201 based on monitoring of internal resistance, etc., control of voltage balance of each cell constituting the storage battery 201, and the like are performed.

  The ECU 208 controls power mechanisms provided in the electric vehicle such as the motor 202, a transmission (not shown), a clutch (not shown), etc. based on information sent from the BMU 207, the motor 202, the inverter 203, the navigation device 209, and the like. Do.

  The navigation device 209 is, for example, a car navigation device, and is based on a positioning signal sent from a GPS satellite 9 (GPS: Global Positioning System) or information sent from a VICS (Vehicle Information and Communication System). The current position (latitude, longitude, altitude) of the electric vehicle is specified, information indicating the current position, map information around the current position, information indicating the route to the destination (guidance), etc. on the screen (video) and audio To users in real time.

  Voltage conversion circuit 210 includes a DC / DC converter that converts the voltage of storage battery 201 into the operating voltage of ECU 208 and navigation device 209. The voltage conversion circuit 210 is configured using, for example, a high voltage chopper circuit or a boost chopper circuit.

  FIG. 3 shows a hard air configuration of a quick charger shown as an example of the charging facility 4. As shown in the figure, the quick charger includes a rectifier circuit 411, a PWM control circuit 412 (PWM: Pluse Width Modulation), a high-frequency transformer 413, and a rectifier circuit 414.

  Among these, the rectifier circuit 411 is configured using a rectifier bridge or the like, and converts alternating current supplied from an alternating current power source into direct current. The PWM control circuit 412 is a circuit that converts the output of the rectifier circuit 411 into a high-frequency pulse, and is configured using a switching element whose on / off timing is controlled by a circuit that controls the output voltage. The high frequency transformer 413 transmits the energy of the high frequency pulse generated by the PWM control circuit 412 to the rectifier circuit 414. The rectifier circuit 414 is a circuit that converts alternating current input via the high-frequency transformer 413 into direct current, and is configured using a rectifier diode, a smoothing capacitor, or the like.

  FIG. 4 shows a hardware configuration of the measurement control device 50. As shown in the figure, the measurement control device 50 includes a central processing unit 501, a storage device 502, a timing device 503, an input I / F 504, a control I / F 505, and a communication device 505.

  The central processing unit 501 is configured using a CPU (Central Processing Unit), an MPU (Micro Processing Unit), or the like, and performs overall control of the measurement control device 50. The storage device 502 is a semiconductor storage device (RAM (Random Access Memory) or ROM (Read Only Memory)), and stores programs and data. The timing device 503 is configured using an RTC (Real Time Clock) or the like, and provides timing information such as the current time.

  The input I / F 504 includes an A / D converter and the like, and notifies the central processing unit 501 of the current value measured by the ammeter 35 as a digital value. The input I / F 504 acquires the voltage value that is acquired through the charging facility 4 and is currently applied to the charging connector 41 of the charging facility 4 (that is, the voltage value of the storage battery 201 of the electric vehicle 2), and acquires the acquired voltage. The value is notified to the central processing unit 501 as a digital value. This voltage value is used to determine whether or not the electric vehicle 2 is currently connected to the charging connector 41.

  The control I / F 505 performs opening / closing control of the relay 36 in accordance with an instruction from the central processing unit 501. The communication device 506 communicates with the main control device 10 according to a predetermined communication method (UART (Universal Asynchronous Receiver Transmitter), USB (Universal Serial Bus), LAN (Local Area Network), PLC (Power Line Communication), CAN ( Controller Area Network)).

  FIG. 5 shows main functions of the measurement control device 50. As shown in the figure, the measurement control device 50 includes functions of a control instruction reception unit 511, a measurement value transmission unit 512, and an opening / closing control unit 513. Note that these functions are realized by hardware included in the measurement control device 50 or by the central processing unit 301 of the measurement control device 50 reading and executing a program stored in the storage device 502.

  Among these, the control instruction receiving unit 511 receives a current measurement request (hereinafter referred to as a current measurement instruction) of the ammeter 35 sent from the main control device 10 and a voltage value applied to the charging connector 41. Various instructions such as a transmission request (hereinafter referred to as a voltage value transmission instruction) and an instruction for controlling opening / closing of the relay 36 (hereinafter referred to as an opening / closing control instruction) are received.

  The measurement value transmission unit 512 is acquired through the input I / F 504 either actively or passively in response to receiving the above instruction (current measurement instruction, voltage value transmission instruction) from the control instruction reception unit 511. The measured value of the ammeter 35 and the voltage value applied to the charging connector 41 are transmitted to the main controller 10.

  The opening / closing control unit 313 controls the state (opening / closing) of the relay 36 in accordance with the opening / closing control instruction received by the control instruction receiving unit 512.

  FIG. 6 shows a hardware configuration of the main controller 10. As shown in the figure, the main control device 10 includes a central processing unit 101, a storage device 102, a timing device 103, an input device 104, a display device 105, and a communication device 106.

  The central processing unit 101 is configured using a CPU, MPU, or the like, and performs overall control of the main control device 10. The storage device 102 is a semiconductor storage device (RAM, ROM, SSD (Solid State Drive)) or the like, and stores programs and data. The timing device 103 is configured using an RTC or the like, and provides timing information such as the current time. The input device 104 is a touch panel (resistive film type, capacitance type, etc.), a keyboard, an operation button, and the like, and receives a user's operation input. The display device 105 is a liquid crystal panel, an organic EL panel, or the like, and visually outputs information. The communication device 106 communicates with the measurement control device 50 according to a predetermined communication method (UART, USB, LAN, PLC, CAN, etc.).

  FIG. 7 shows main functions of the main control device 10 and main data included in the main control device 10. As shown in the figure, the main control device 10 includes an operation receiving unit 111, an authentication processing unit 112, a charging start processing unit 113, a charging stop processing unit 114, a charging duration monitoring unit 115, a charging completion processing unit 116, and information setting. Each function of the processing unit 117 and the measurement value acquisition management unit 118 is provided. Note that these functions are realized by hardware included in the main control device 10 or by the central processing unit 101 of the main control device 10 reading and executing a program stored in the storage device 102.

  Among the functions shown in FIG. 7, the operation reception unit 111 receives an operation input related to charging of the electric vehicle 2 from the user. The authentication processing unit 112 receives authentication information (user ID, password, etc.) for performing operations and settings related to charging of the electric vehicle 2 from the user, and compares the received authentication information with a user information management table 121 described later. And authenticate.

  The charging start processing unit 113 receives registration for starting charging of the electric vehicle 2 from the user. The charging cancellation processing unit 114 performs processing for canceling charging when an operation for canceling charging of the electric vehicle 2 is received from the user.

  The charging time monitoring unit 115 is the time from the start of charging of the electric vehicle 2 to the current time (hereinafter referred to as a charging duration time. Note that if charging is resumed after charging has been interrupted, The electric vehicle 2 in which the time until the present time is the charging duration exceeds the preset time (hereinafter referred to as the maximum charging duration (hereinafter also referred to as Tmax)) and is in the charging standby state. Is present, the charging of the electric vehicle 2 whose charging duration has exceeded Tmax is interrupted, and charging of the electric vehicle 2 in the charging standby state is started.

  The charging completion processing unit 116 monitors whether the electric vehicle 2 has been fully charged (whether the charging amount of the storage battery 201 is equal to or greater than a predetermined value) (monitors in real time or at a preset timing), When the charging is completed, the charging of the electric vehicle 2 is stopped. As will be described later, the charging completion processing unit 116 determines whether or not the current value supplied to the charging facility 4 to which the electric vehicle 2 is connected is equal to or lower than a charging end determination value Iend described later. By examining, it is determined whether or not charging of the electric vehicle 2 is completed. In addition, when the charging of the electric vehicle 2 is stopped, the charging completion processing unit 116 starts charging the electric vehicle 2 in the charging waiting state if there is an electric vehicle 2 in the charging waiting state.

  The information setting processing unit 117 receives a user operation input and sets the contents of a user information management table 121, a setting information management table 122, and a scheduled maximum charging current management table 123, which will be described later. Note that the information setting processing unit 117 includes the user information management table 121, the setting information management table 122, and the scheduled maximum charging current management table 123 only when the user authenticated by the authentication processing unit 112 has administrator authority. Allow update.

  The measurement value acquisition management unit 118 transmits the above-described current measurement instruction and voltage transmission instruction to the measurement control device 50 as needed. Further, the measurement value acquisition management unit 118 receives a current value measured by the ammeter 35 and a voltage value applied to the charging connector 41 sent from the measurement control device 50. The measurement value acquisition management unit 118 updates the contents of the charging stand management table 124 and the charging standby stand management table 125 based on the information received from the measurement control device 50.

  As shown in FIG. 7, the main control device 10 manages a user information management table 121, a setting information management table 122, a scheduled maximum charging current management table 123, a charging stand management table 124, and a charging standby stand management table 125. doing.

  FIG. 8 shows an example of the user information management table 121. As shown in the figure, the user management table 121 includes one or more records having items of a user ID 1211, a password 1212, and an administrator authority 1213.

  Among these, the user ID 1211 is set with an identifier (user ID) assigned to each user. A password is set in the password 1212. In the administrator authority 1213, information (present / absent) indicating whether or not the user of the record has the administrator authority is set.

  FIG. 9 shows an example of the setting information management table 122. As shown in the figure, the setting information management table 122 manages a maximum allowable current Imax 1221, a simultaneously chargeable number Nmax 1222, a maximum charging duration Tmax 1223, and a charging end determination value Iend 1224.

  Among these, the maximum allowable current Imax1221 is the maximum value of current that can be supplied by the charging system 1 (the power supply 3 can be supplied to the main line 31) (the upper limit value of the total current consumption of the charging equipment 4 (hereinafter, Imax). Also referred to as))).

  The simultaneously chargeable number Nmax1222 is set to the simultaneously chargeable number (hereinafter also referred to as Nmax), which is the maximum value of the number of electric vehicles 2 that can be charged simultaneously by the charging system 1.

  The above-described Tmax is set as the maximum charge duration time Tmax1223.

  In the charging end determination value Iend1224, a charging end determination value (hereinafter also referred to as Iend) that is a current value used when determining whether or not the charging of the electric vehicle 2 is completed is set.

  FIG. 10 shows an example of the scheduled maximum charging current management table 123. As shown in the figure, the scheduled maximum charging current management table 123 is composed of one or more records having items of the vehicle type 1231 and the scheduled maximum charging current 1232.

  Among these, the vehicle type 1231 is set with information for specifying the vehicle type of the electric vehicle 2. The scheduled maximum charging current 1232 includes a maximum value of current flowing through the branch line 33 that supplies power to the charging facility 4 to which the electric vehicle 2 is connected when the electric vehicle 2 is charged (hereinafter, the planned maximum charging current). (Referred to as Δi).

  FIG. 11 shows an example of the charging stand management table 124. In this charging stand management table 124, records indicating charging facilities 4 (stands) currently being charged (one record corresponds to one charging facility 4) are managed.

  As shown in the figure, in the charging stand management table 124, records having items of a stand ID 1241, a vehicle type 1242, a charging current 1243, and a charging start date 1244 are registered.

  In the stand ID 1241, an identifier (hereinafter referred to as a stand ID) assigned to each charging facility 4 is set.

  In the vehicle type 1242, information indicating the vehicle type of the electric vehicle 2 currently connected to the stand of the record (the vehicle type selected by the user on the vehicle type selection screen 1800 described later) is set.

  In the charging current 1243, the current charging current of the stand of the record, which is notified from the measurement control device 50 as needed, is set.

  In the charging start date and time 1244, the date and time when charging of the electric vehicle 2 currently connected to the stand of the record is started (hereinafter referred to as the charging start date and time) is set. When charging is started again after the maximum charging duration time Tmax is exceeded, the charging start date and time 2234 is set to the date and time when charging is started again.

  FIG. 12 shows an example of the charging stand management table 125. In the charging standby stand management table 125, a record (one record corresponds to one charging facility 4) indicating the charging facility 4 currently in the charging standby state is managed.

  As shown in the figure, a record having items of a stand ID 1251, a car type 1252, and a registration date and time 1253 is registered in the charging stand management table 125.

  Among these, the stand ID 1251 is set with a stand ID. In the vehicle type 1252, information indicating the vehicle type of the electric vehicle 2 currently connected to the stand of the record (the vehicle type selected by the user on the vehicle type selection screen 1800 described later) is set.

  In the registration date and time 1253, the date and time when the record is registered in the charging standby stand management table 125 is set.

= Description of processing =
Next, processing performed in the charging system 1 having the above configuration will be described.

<Operation input acceptance processing>
FIG. 13 is a flowchart for explaining a process (hereinafter referred to as an operation input receiving process S1300) performed when the main control apparatus 10 receives an operation input from a user via the input device 104. Hereinafter, the operation input receiving process S1300 will be described with reference to FIG.

  When accepting an operation input from the user, main controller 10 first requests the user to input authentication information (S1311 to S1312).

  FIG. 14 shows a screen (hereinafter referred to as an authentication screen 1400) displayed on the display device 105 by the main control device 10 when requesting the user to input authentication information.

  As shown in the figure, the authentication screen 1400 is provided with a user ID input field 1411, a password input field 1412, and a numeric keypad 1413 for inputting a character string thereto. The user operates the numeric keypad 1413 to input the user ID in the user ID input field 1411 and the password in the password input field 1412. As shown in the figure, the authentication screen 1400 is provided with a status display field 1414 for notifying the user of the current status of the charging system 1.

  FIG. 15 shows an example of display contents in the status display field 1414. As shown in the figure, in the status display column, for each stand (stand ID 151), the state 152 of the stand (“charging” or “standby”) and the electric vehicle 2 connected to the stand 153 are displayed. The total charging power amount 153, the total charging time 154 after the electric vehicle 2 connected to the stand 153 is connected to the stand 153, and the state 152 of the stand when “standby” is set Information such as a time at which charging is scheduled to start next time (a scheduled charging start time 155) is displayed.

  The main controller 10 obtains the scheduled charging start time 155 based on, for example, the charging stand management table 124, the charging standby stand management table 125, and the setting information management table 122.

  Returning to FIG. 13, main controller 10 collates the authentication information received in S1312 with the contents of user information management table 121 (S1313). If the authentication information is correct (S1313: YES), a screen (hereinafter referred to as menu screen 1600) for accepting an operation related to charging from the user is displayed (S1314).

  FIG. 16 shows an example of the menu screen 1600. As shown in the figure, the menu screen 1600 is provided with a stand selection field 1611 and a process selection field 1612.

  In S1315, main controller 10 determines whether or not a time during which the user has not operated anything on input device 104 (hereinafter referred to as a non-operation time) exceeds a preset threshold time. ing. If the non-operation time exceeds the threshold value (S1315: YES), the process returns to S1311 to request authentication information again. On the other hand, if the user has operated the menu screen 1600 within the threshold time (S1316: YES), the process proceeds to S1317.

  In step S <b> 1317, the main control apparatus 10 determines whether the operation performed by the user is an operation for selecting a stand with respect to the stand selection field 1611. If the operation is to select a stand (S1317: YES), main controller 10 stores the stand ID of the selected stand (S1318). Thereafter, the process returns to S1314.

  In S1321, main controller 10 determines whether or not the operation performed by the user is an operation of selecting charging start button 165. When the operation is to select the charging start button 165 (S1321: YES), the main controller 10 executes a charging start process S1322. Thereafter, the process returns to S1314.

  In S <b> 1323, main controller 10 determines whether or not the operation performed by the user is an operation of selecting charging stop button 166. When it is operation which selects charge stop button 166 (S1323: YES), main controller 10 performs charge stop processing S1324. Thereafter, the process returns to S1314.

  In S1325, main controller 10 determines whether or not the operation performed by the user is an operation for selecting maintenance button 167. When the operation is to select the maintenance button 167 (S1325: YES), the main controller 10 executes the maintenance process S1326. Thereafter, the process returns to S1314.

<Charge start processing>
FIG. 17 is a flowchart illustrating details of the charging start process S1322 of FIG. Hereinafter, the charging start process S1322 will be described in detail with reference to FIG.

  First, main controller 10 displays a screen for selecting a vehicle type (hereinafter referred to as a vehicle type selection screen 1800) on display device 105, and acquires the vehicle type of electric vehicle 2 to be charged from the user (S1711).

  FIG. 18 shows an example of the vehicle type selection screen 1800. As shown in the figure, a selection button 1811 for selecting a vehicle type, a vehicle type 1812, a planned maximum charging current 1813, and the like are displayed on the vehicle type selection screen 1800. The main controller 10 generates a vehicle type selection screen 1800 based on the contents of the scheduled maximum charging current management table 123.

  When the user selects a vehicle type from vehicle type selection screen 1800, main controller 10 acquires planned maximum charging current Δi corresponding to the selected vehicle type (S1712).

  Subsequently, main controller 10 communicates with each measurement controller 50 to acquire the current value flowing through each branch line 33, and sums the acquired current values to obtain a current value Ir flowing through main line 31 (S1713). .

  Next, main controller 10 adds a value obtained by adding planned maximum charging current Δi acquired in S1712 to current value Ir obtained in S1713, which is equal to or less than Imax set in maximum allowable current Imax1221 in setting information management table 122. It is determined whether or not there is (S1714).

  As a result of the determination, if the added value Ir + Δi is equal to or less than Imax (S1714: YES), the process proceeds to S1715. On the other hand, if the added value Ir + Δi exceeds Imax (S1714: NO), the process proceeds to S1731.

  In S1715, the main controller 10 is connected to the electric vehicle 2 in the total number Nr of electric vehicles 2 currently connected to the charging system 1 (that is, the charging equipment 4 to which the charging current is supplied from the power source 3). The number of charging facilities 4) is acquired. In addition, the main controller 10 notifies the voltage value applied to the charging connector 41 of the charging facility 4 that is notified from the measurement control device 50, for example, whether or not the electric vehicle 2 is connected to the charging facility 4. Based on (for example, whether or not the voltage value is within the voltage range normally held by the storage battery 201 of the electric vehicle 2).

  Next, main controller 10 is set to a value obtained by adding 1 to the total value Nr of the number of connected electric vehicles 2 currently connected to charging system 1 and the simultaneously chargeable number Nmax 1222 of setting information management table 122. It is determined whether or not Nr + 1 is equal to or less than Nmax (S1716).

  If Nr + 1 is equal to or less than Nmax as a result of the above determination (S1716: YES), the process proceeds to S1717. On the other hand, if Nr + 1 exceeds Nmax (S1716: NO), the process proceeds to S1731.

  In S1717, main controller 10 transmits an opening / closing control instruction to measurement controller 50, and starts power feeding to the stand (the stand stored in S1318 of FIG. 13; hereinafter referred to as the currently selected stand). Further, main controller 10 registers the record of the selected stand in charging stand management table 124 (S1718), and starts measuring the duration of charging for the selected stand (S1719). Thereafter, the process returns to S1314 in FIG.

  In S1731, main controller 10 registers the record of the currently selected stand in charging stand management table 125. Thereafter, the process returns to S1314 in FIG.

  In the charging start process S1322 described above, both the restriction by the maximum allowable current Imax and the restriction by the simultaneously chargeable number Nmax are imposed as conditions for starting charging, but only one of the conditions is set. May be imposed.

<Charge stop processing>
FIG. 19 is a flowchart for explaining the details of the charging stop processing S1324 of FIG. Hereinafter, the charging stop process S1324 will be described in detail with reference to FIG.

  First, main controller 10 checks whether or not the stand stored in S1318 of FIG. 13 (hereinafter referred to as a selected stand) is currently being charged (S1911). Specifically, it is determined whether or not the selected stand is currently charged by checking whether or not the selected stand record is currently registered in the charging stand management table 124.

  If the selected stand is currently being charged (S1911: YES), main controller 10 executes a charge stop process S2000 described later (S1912). Thereafter, the process returns to S1314. If the currently selected stand is not currently being charged (S1911: NO), the main control apparatus 10 deletes the record of the currently selected stand from the charging standby stand management table 125 (S1913). Thereafter, the process returns to S1314.

<Charge stop processing>
FIG. 20 is a flowchart for explaining the details of the charging stop process S2000 in FIG. Hereinafter, the charging stop process S2000 will be described in detail with reference to FIG.

  First, the main controller 10 transmits an opening / closing control instruction to the measurement controller 50 to stop power supply to the selected stand (S2011). Further, main controller 10 deletes the record of the selected stand from charging stand management table 124 (S2012).

  Next, main controller 10 checks whether there is a record of another stand in charge stand management table 125 (S2013). If there is a record for another stand (S2013: YES), the process proceeds to S2014. If a record for another stand does not exist (S2013: NO), the process returns to S1314 in FIG.

  In S2014, the main controller 10 selects one record from the charging standby stand management table 125. If there are a plurality of records in the charging standby stand management table 125, the target is narrowed down based on a predetermined condition (such as selecting the oldest registered date 1253, giving priority to the younger stand ID 1251). Select one record.

  Next, main controller 10 acquires planned maximum charging current Δi corresponding to vehicle type 1252 of the record from scheduled maximum charging current management table 123 (S2015).

  Next, the main controller 10 communicates with each measurement controller 50 to acquire the current value of each branch line 33, and sums the acquired current values to obtain a current value Ir flowing through the main line 31 (S2016).

  Next, main controller 10 adds a value obtained by adding planned maximum charging current Δi acquired in S2015 to current value Ir obtained in S2016, which is equal to or less than Imax set in maximum allowable current Imax1221 of setting information management table 122. It is determined whether or not there is (S2017).

  As a result of the determination, if the added value Ir + Δi is equal to or less than Imax (S2017: YES), the process proceeds to S2018. If the added value Ir + Δi exceeds Imax (S2017: NO), the process returns to S1314 in FIG.

  In S2018, the main controller 10 is connected to the electric vehicle 2 in the total number Nr of electric vehicles 2 currently connected to the charging facility 4 (that is, the charging facility 4 to which the charging current is supplied from the power source 3). The number of charging facilities 4) is acquired. Then, main controller 10 compares the value obtained by adding 1 to the total number Nr of connected units acquired in S2018 with Nmax set in simultaneous chargeable number Nmax1222 of setting information management table 122, and Nr + 1 is Nmax. It is determined whether or not the following is true (S2019).

  If Nr + 1 is less than or equal to Nmax as a result of the above determination (S2019: YES), the process proceeds to S2020. If Nr + 1 exceeds Nmax (S2019: NO), the process returns to S1314 in FIG.

  In S2020, the main control device 10 transmits an opening / closing control instruction to the measurement control device 50, starts power supply to the stand (the stand selected in S2014), and charges the electric vehicle 2 connected to the stand. Start. Further, main controller 10 registers the record of the stand in charging stand management table 124 (S2021), and starts measuring the charging duration of the stand (S2022).

  Next, main controller 10 deletes the record of the stand from charge stand management table 125 (S2023). Thereafter, the process returns to S1314 in FIG.

  In the charge stop process S2000 described above, both the restriction by the maximum allowable current Imax and the restriction by the simultaneously chargeable number Nmax are imposed as conditions for starting charging, but only one of the conditions is set. May be imposed.

<Charging duration monitoring process>
In FIG. 21, main controller 10 monitors whether or not the charging duration exceeds the maximum charging duration Tmax as needed (real time, preset timing, etc.), and the charging duration is set to the maximum charging duration Tmax. When there is a stand exceeding the charge and there is a stand waiting for charging (when one or more records are registered in the charge waiting stand management table 125), the charge duration is set to the maximum charge duration Tmax. It is a flowchart explaining the process (henceforth charging duration monitoring process S2100) which stops the electric power feeding to the stand which has exceeded and starts the electric power feeding to another stand. Hereinafter, the charging duration monitoring process S2100 will be described with reference to FIG.

  Main controller 10 monitors at any time whether the charging duration exceeds the maximum charging duration Tmax (S2105). When main controller 10 detects that there is a stand whose charging duration exceeds maximum charging duration Tmax (S2105: YES), the process proceeds to S2110.

  In S2110, main controller 10 checks whether there is a record of another stand waiting for charging in charging stand management table 125. If there is a record of another stand (S2110: YES), the process proceeds to S2111, and if it does not exist (S2110: NO), the process returns to S2105.

  In S2111, main controller 10 transmits an opening / closing control instruction to measurement controller 50, and in S2105, it is detected that the charging duration exceeds the maximum charging duration Tmax (hereinafter referred to as an overtime stand). )). Further, main controller 10 deletes the record of the excess time stand from charging stand management table 124 (S2112).

  Subsequently, main controller 10 registers the record of the excess time stand in charging stand management table 125 (S2113).

  Next, main controller 10 selects one record other than the time-over stand from the charge stand management table 125 (S2114). If there are a plurality of records in the charging standby stand management table 125, the target is narrowed down based on a predetermined condition (such as selecting the oldest registered date 1253, giving priority to the youngest stand ID 1251). Select one record.

  Next, main controller 10 acquires planned maximum charging current Δi corresponding to vehicle type 1252 of the selected record from scheduled maximum charging current management table 123 (S2115).

  Next, the main controller 10 communicates with each measurement controller 50 to acquire the current value of each branch line 33, and sums the acquired current values to obtain a current value Ir flowing through the main line 31 (S2116).

  Next, main controller 10 adds a value obtained by adding planned maximum charging current Δi acquired in S2115 to current value Ir obtained in S2116 to be equal to or less than Imax set in maximum allowable current Imax1221 of setting information management table 122. It is determined whether or not there is (S2117).

  As a result of the determination, if the added value Ir + Δi is equal to or less than Imax (S2117: YES), the process proceeds to S2118. If the added value Ir + Δi exceeds Imax (S2117: NO), the process returns to S2105.

  In S2118, the main controller 10 is connected to the electric vehicle 2 in the total number Nr of electric vehicles 2 currently connected to the charging facility 4 (that is, the charging facility 4 to which the charging current is supplied from the power source 3). The number of charging facilities 4) is acquired. Then, main controller 10 compares the value obtained by adding 1 to the total number Nr of connected units acquired in S2118 with Nmax set in the simultaneous chargeable number Nmax 1222 of the setting information management table 122, and Nr + 1 is Nmax. It is determined whether or not the following is true (S2119).

  If Nr + 1 is less than or equal to Nmax as a result of the above determination (S2119: YES), the process proceeds to S2120, and if Nr + 1 exceeds Nmax (S2119: NO), the process returns to S2105.

  In S2120, main controller 10 transmits an open / close control instruction to measurement controller 50 to start power supply to the stand (the stand selected in S2114), and charges electric vehicle 2 connected to the stand. Start. Further, main controller 10 registers the record of the stand in charging stand management table 124 (S2121), and starts measuring the charging duration of the stand (S2122).

  Next, main controller 10 deletes the record of the stand from charging stand management table 125 (S2123). Thereafter, the process returns to S2105.

  In the charging duration monitoring process S2100 described above, both the limitation by the maximum allowable current Imax and the limitation by the simultaneously chargeable number Nmax are imposed as conditions for starting charging. Only conditions may be imposed.

<Charging duration monitoring process>
In FIG. 22, the main control device 10 monitors whether or not there is a stand that has been fully charged (real time, preset timing, etc.), there is a stand that has been charged, and When there is a stand waiting for charging (when one or more records are registered in the charge waiting stand management table 125), power supply to the stand that has been charged is stopped, 6 is a flowchart for explaining processing for starting power supply to the stand (hereinafter referred to as charging completion processing S2200). Hereinafter, the charging completion processing S2200 will be described with reference to FIG.

  As shown in the figure, the main controller 10 monitors at any time whether or not there is a stand that has been charged (S2210). Specifically, main controller 10 determines whether or not there is a stand (hereinafter referred to as a charging completion stand) in which the value of charging current 1243 in charging stand management table 124 is equal to or lower than charging end determination value Iend. It is determined whether there is a stand that has been fully charged. When main controller 10 detects that a charging completion stand exists (S2210: YES), the process proceeds to S2211.

  In S2211, main controller 10 transmits an open / close control instruction to measurement controller 50 to stop power supply to the charging completion stand. Then, main controller 10 deletes the record of the charging completion stand from the charging stand management table 124 (S2212).

  In S2213, main controller 10 checks whether there is a record of another stand waiting for charging in charging stand management table 125 (S2213). If there is a record of another stand waiting for charging (S2213: YES), the process proceeds to S2214, and if not (S2213: NO), the process returns to S2210.

  In S2214, main controller 10 selects one record from charging standby stand management table 125. If there are a plurality of records in the charging standby stand management table 125, the target is narrowed down based on a predetermined condition (such as selecting the oldest registration date 1253, giving priority to the younger stand ID 1251). To select one record.

  Next, main controller 10 acquires scheduled maximum charging current Δi corresponding to vehicle type 1252 of the record from scheduled maximum charging current management table 123 (S2215).

  Next, the main controller 10 communicates with each measurement controller 50 to acquire the current value of each branch line 33, and sums the acquired current values to obtain a current value Ir flowing through the main line 31 (S2216).

  Next, main controller 10 adds a value obtained by adding planned maximum charging current Δi acquired in S2215 to current value Ir obtained in S2216, which is equal to or less than Imax set in maximum allowable current Imax1221 of setting information management table 122. It is determined whether or not there is (S2217).

  As a result of the determination, if the added value Ir + Δi is equal to or less than Imax (S2217: YES), the process proceeds to S2218, and if the added value Ir + Δi exceeds Imax (S2217: NO), the process returns to S2210.

  In S2218, the main controller 10 is connected to the electric vehicle 2 in the total number Nr of electric vehicles 2 currently connected to the charging facility 4 (that is, the charging facility 4 to which the charging current is supplied from the power source 3). The number of charging facilities 4) is acquired. Then, main controller 10 compares the value obtained by adding 1 to the total number Nr of connected units acquired in S2218 with Nmax set in simultaneously chargeable number Nmax1222 in setting information management table 122, and Nr + 1 is Nmax. It is determined whether or not the following is true (S2019).

  If Nr + 1 is less than or equal to Nmax as a result of the above determination (S2219: YES), the process proceeds to S2220. If Nr + 1 exceeds Nmax (S2219: NO), the process returns to S2210.

  In S2220, main controller 10 transmits an open / close control instruction to measurement controller 50 to start power supply to the stand (the stand selected in S2214), and charge electric vehicle 2 connected to the stand. Start. Further, main controller 10 registers the record of the stand in charging stand management table 124 (S2221), and starts measuring the duration of charging for the stand (S2222).

  In S2223, main controller 10 deletes the record of the stand from charging stand management table 125 (S2223). Thereafter, the process returns to S2210.

  In the charging completion process S2200 described above, both the restriction by the maximum allowable current Imax and the restriction by the simultaneously chargeable number Nmax are imposed as conditions for starting charging, but only one of the conditions is set. May be imposed.

<Specific example>
FIG. 23 shows a specific example of the charging control performed by the processing described above. In this example, the number of charging facilities 4 (stands) is 4, the number of simultaneously chargeable units (Nmax) is 2, the maximum charging duration is Tmax, the planned maximum charging current is Δi, and the charging end determination value is Iend.

  First, at time ta, the user selects “1” as the stand ID on the menu screen 1600 in FIG. 16 (S1317: YES in FIG. 13) and selects the charge start button 165 (S1321: YES). At this time, the electric vehicle 2 is not connected to the other stand, and both the condition “Ir + Δi ≦ Imax” in S1714 and the condition “Nr + 1 ≦ Nmax” in S1716 are satisfied. For this reason, main controller 10 starts charging electric vehicle 2 by the stand (the stand having the stand ID “1”) (S1717).

  At time tb, the user selects “2” as the stand ID on the menu screen 1600 (S1317: YES in FIG. 13) and selects the charging start button 165 (S1321: YES). At this time, although the electric vehicle 2 is already connected to the stand with the stand ID “1” and charging is started, the conditions “Ir + Δi ≦ Imax” in S1714 and the conditions “Nr + 1 ≦ Nmax” in S1716 are satisfied. Since both are satisfied, main controller 10 starts charging electric vehicle 2 by the stand (the stand having the stand ID “2”) (S1717).

  At time tc, the user selects “3” as the stand ID on the menu screen 1600 (S1317: YES in FIG. 13) and selects the charging start button 165 (S1321: YES). At this time, the electric vehicle 2 has already been connected to the stands having the stand IDs “1” and “2”, and charging has started. The condition “Ir + Δi ≦ Imax” in S1714 or the condition “Nr + 1 ≦ Nmax” in S1716 in FIG. Therefore, the main control apparatus 10 reserves charging of the stand (the stand whose stand ID is “3”) (registers the record of the stand in the charge waiting stand management table 125). (S1731).

  At time td, the user selects “4” as the stand ID on the menu screen 1600 (S1317: YES in FIG. 13) and selects the charging start button 165 (S1321: YES). At this time, the electric vehicle 2 has already been connected to the stands having the stand IDs “1” to “3” and charging has started, and the condition “Ir + Δi ≦ Imax” in S1714 or the condition “Nr + 1 ≦ Nmax” in S1716 in FIG. Therefore, the main control apparatus 10 reserves charging for the corresponding stand (registers a record in the charging standby stand management table 125) (S1731).

  At time te, main controller 10 detects that the charging duration of the stand whose stand ID is “1” exceeds the maximum charging duration Tmax (S2105: YES), and there is another reservation ( (S2110: YES), power supply to the stand whose stand ID is “1” is stopped (S2111), and the stand is stored in the stand-by stand-up management table. 125 (S2113). Then, main controller 10 selects another stand registered in the stand-by for charging stand management table 125 (here, the stand whose stand ID is “3”) (S2114), and even if charging starts for this stand, After confirming that both the condition “Ir + Δi ≦ Imax” in S2117 and the condition “Nr + 1 ≦ Nmax” in S2119 are satisfied, the electric vehicle 2 is charged by the corresponding stand (the stand whose stand ID is “3”). It has started (S2120).

  At time tf, main controller 10 detects that the charging duration of the stand whose stand ID is “2” exceeds the maximum charging duration Tmax (S2105: YES), and there is another reservation ( (S2110: YES), power supply to the stand whose stand ID is “2” is stopped (S2111), and the stand is stored in the stand-by stand-up management table. 125 (S2113). Then, main controller 10 selects another stand (in this case, a stand having a stand ID of “4”) registered in stand-by charging stand management table 125 (S2114), and even when charging starts for this stand, After confirming that both the condition “Ir + Δi ≦ Imax” of S2117 and the condition “Nr + 1 ≦ Nmax” of S2119 are satisfied, charging of the electric vehicle 2 by the corresponding stand (the stand having the stand ID “4”) is started. (S2120).

  At time tg, main controller 10 detects that the current value of the stand whose stand ID is “4” is equal to or lower than charge end determination value Iend (S2210: YES), and stops power supply to the stand. (S2211). Then, main controller 10 selects another stand (in this case, the stand whose stand ID is “1”) registered in stand-by charging stand management table 125 (S2214), and even when charging starts for this stand, After confirming that both the condition “Ir + Δi ≦ Imax” in S2217 and the condition “Nr + 1 ≦ Nmax” in S2219 are satisfied, charging of the electric vehicle 2 by the corresponding stand (the stand having the stand ID “1”) is started. (S2220).

  At time th, main controller 10 detects that the charging duration of the stand whose stand ID is “3” exceeds the maximum charging duration Tmax (S2105: YES), and there is another reservation ( (S2110: YES), the power supply to the stand with the stand ID “3” is stopped (S2111), and the stand is stored in the stand-by stand-up management table 125. (S2113). Then, main controller 10 selects another stand (in this case, the stand whose stand ID is “2”) registered in charge stand management table 125 (S2114), and even when charging starts for this stand, After confirming that both the condition “Ir + Δi ≦ Imax” of S2117 and the condition “Nr + 1 ≦ Nmax” of S2119 are satisfied, charging of the electric vehicle 2 by the corresponding stand (the stand having the stand ID “2”) is started. (S2120).

  At the time ti, the user selects “2” as the stand ID on the menu screen 1600 (S1317: YES in FIG. 13) and selects the charge stop button 166 (S1323: YES). For this reason, the main controller 10 stops power supply to the stand (S2011 in FIG. 20). Then, the main control device 10 selects another stand registered in the stand-by for charging stand management table 125 (here, the stand whose stand ID is “3”) (S2014), and even when charging starts for this stand, After confirming that both the condition “Ir + Δi ≦ Imax” in S2017 and the condition “Nr + 1 ≦ Nmax” in S2019 are satisfied, charging of the electric vehicle 2 by the corresponding stand (the stand having the stand ID “3”) is started. (S2120).

  At time tj, main controller 10 detects that the charging duration of the stand whose stand ID is “1” exceeds the maximum charging duration Tmax (S2105: YES), but there is no other reservation (charging). It is determined that the record is not registered in the waiting stand management table 125 (S2110: NO), and the charging of the electric vehicle 2 by the stand (the stand whose stand ID is “1”) is continued as it is.

  At time tk, the user selects “4” as the stand ID on the menu screen 1600 (S1317: YES in FIG. 13) and selects the charging start button 165 (S1321: YES). At this time, charging is performed for the stands having the stand IDs “1” and “3”. Here, main controller 10 determines that either of the conditions “Ir + Δi ≦ Imax” of S1714 in FIG. 17 or the conditions “Nr + 1 ≦ Nmax” of S1716 is not satisfied, and the stand (the stand ID is “4”). The charging of the stand) is reserved (a record is registered in the charging stand management table 125) (S1731).

  At time tl, main controller 10 detects that the current value of the stand whose stand ID is “3” is equal to or lower than charge end determination value Iend (S2210: YES), and stops power supply to the stand. (S2211). Then, main controller 10 selects another stand (in this case, a stand having a stand ID “4”) registered in stand-by charging stand management table 125 (S2214), and even when charging starts for this stand, After confirming that both the condition “Ir + Δi ≦ Imax” of S2217 and the condition “Nr + 1 ≦ Nmax” of S2219 are satisfied, supply of charging current to the corresponding stand (stand with the stand ID “4”) is started. (S2220).

  As is clear from the above specific example, according to the charging system 1 of the present embodiment, electric current is efficiently supplied to the charging equipment 4 within a range in which the current value supplied by the power source 3 does not exceed the maximum allowable current Imax. The vehicle 2 can be charged. In addition, main controller 10 forcibly stops supplying current to charging facility 4 that has exceeded maximum charging duration Tmax after a certain charging facility 4 starts charging electric vehicle 2, and instead charges the charging facility 4. The charging for the reserved charging equipment 4 is automatically started. Therefore, the charging of the electric vehicle 2 that has been reserved for charging can be started early. As described above, according to the charging system 1 of the present embodiment, it is possible to appropriately and efficiently charge the plurality of electric vehicles 2 in an environment where the power that can be supplied from the power source 3 is limited.

  When main controller 10 receives a stop instruction from the user and stops the supply of current from power supply 3 to a certain charging facility 4, main controller 10 starts supplying current to another charging facility 4 in a standby state. As described above, in the charging system 1 of the present embodiment, when the stop instruction is received, the supply of current to the other charging facilities 4 that are in the standby state is automatically started. It is possible to start charging of the electric vehicle 2 that is present at an early stage. For this reason, according to the charging system 1 of the present embodiment, it is possible to appropriately and efficiently charge the plurality of electric vehicles 2 in an environment where the power that can be supplied by the power source 3 is limited.

  Further, when the supply of current from the power supply 3 to the charging facility 4 that has been charged is stopped, the main control device 10 starts supplying current to the other charging facilities 4 in the standby state. As described above, in the charging system 1 of the present embodiment, when the supply of current from the power source 3 is stopped for the charging facility 4 that has been charged, supply of current to the other charging facilities 4 in the standby state is performed. Is automatically started, so that charging of the electric vehicle 2 that is subsequently reserved for charging can be started at an early stage. For this reason, according to the charging system 1 of the present embodiment, it is possible to appropriately and efficiently charge the plurality of electric vehicles 2 in an environment where the power that can be supplied by the power source 3 is limited.

  Further, according to the charging system 1 of the present embodiment, the current value currently supplied by the power source 3 does not exceed the maximum allowable current Imax, and the total number of currently connected electric vehicles 2 exceeds the simultaneously chargeable number Nmax. The electric vehicle 2 can be charged by supplying current to each charging equipment 4 efficiently within a range that does not exist. In addition, after starting charging, the charging facility 4 forcibly exceeding the maximum charging duration time Tmax is forcibly stopped, and charging is automatically started for the charging facility 4 reserved for charging instead. Therefore, the charging of the electric vehicle 2 that is subsequently reserved for charging can be started early. For this reason, according to the charging system 1 of the present embodiment, it is possible to appropriately and efficiently charge the plurality of electric vehicles 2 in an environment where the power that can be supplied by the power source 3 is limited.

<Maintenance processing>
FIG. 24 is a flowchart for explaining the details of the maintenance process S1326 shown in FIG. Hereinafter, it will be described with reference to FIG.

  First, main controller 10 displays a screen (hereinafter referred to as maintenance screen 2500) that allows the user to select a maintenance item on display device 105 (S2411).

  FIG. 25 shows an example of the maintenance screen 2500. As shown in the figure, the maintenance screen 2500 is provided with a plurality of buttons that allow the user to specify maintenance items.

  Among these, the maximum allowable current (reference numeral 2511), the simultaneously chargeable number (reference numeral 2512), the maximum charge duration (reference numeral 2513), and the charge end determination value (reference numeral 2514) are all the contents of the setting information management table 122. This button is selected when setting. When one of these four buttons is selected (S2412: YES), an input field corresponding to the selected button is displayed, and when the user inputs contents in the input field, the main controller 10 is input. The contents are set as the contents of the setting information management table 122 (S2421). Thereafter, the process returns to S1314 in FIG.

  When planned maximum charging current (reference numeral 2521) on maintenance screen 2500 is selected (S2413: YES), main controller 10 receives and accepts scheduled maximum charging current Δi for each vehicle type of electric vehicle 2 from the user. The contents are registered in the scheduled maximum charging current management table 123 (S2422). Thereafter, the process returns to S1314 in FIG.

  When the user information registration (reference numeral 2522) on the maintenance screen 2500 is selected (S2414: YES), the main control apparatus 10 receives a user ID, a password, and the like from the user, and manages the received contents as user information management. It is registered in the table 121 (S2423). Thereafter, the process returns to S1314 in FIG.

  When “return” 2523 on the maintenance screen 2500 is selected (S2415: YES), the process returns to S1314 in FIG.

  By the way, the embodiment described above is for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

  In the above-described embodiment, the charging cancellation process S1900 is executed when the user selects the charging cancellation 166 on the menu screen 1600. For example, the charging connector 41 of the charging facility 4 is disconnected from the electric vehicle 2. In response to this, the charging stop processing S1900 may be executed. In this case, for example, it is determined that the charging connector 41 has been disconnected from the electric vehicle 2 when the voltage applied to the charging connector 41 has become equal to or lower than a predetermined threshold value.

  In the above, an electric vehicle has been described as an example of the electric vehicle 2. However, even when the electric vehicle 2 is, for example, an electric motorcycle or an electric bicycle, the same configuration as that of the charging system 1 described above is realized. can do.

  In the above embodiment, the main control device 10 and the measurement control device 50 are configured as separate hardware, but these can also be realized by the same hardware.

DESCRIPTION OF SYMBOLS 1 Charging system 2 Electric vehicle 201 Storage battery 3 Power supply 4 Charging equipment 41 Charging connector 10 Main controller 122 Setting information management table 123 Scheduled maximum charging current management table 124 Standing charging management table 125 Standing charging stand management table 35 Ammeter 50 Measurement control Device 1221 Maximum allowable current Imax
1222 Simultaneously chargeable units Nmax
1223 Maximum charging duration Tmax
1224 Charge end determination value Iend
S1300 Operation input acceptance process S1322 Charge start process S1900 Charge stop process S2000 Charge stop process S2100 Charge duration monitoring process S2200 Charge completion process S2400 Maintenance process

Claims (8)

A power supply for supplying power for charging the electric vehicle;
A charging facility for charging the electric vehicle with electric power supplied from the power source;
A control device that acquires a current value supplied to each of the charging facilities, and controls supply of current from the power source to each of the charging facilities;
An electric vehicle charging system comprising:
The control device includes:
Accepting a reservation for charging an electric vehicle by the charging facility,
This is the maximum current value that is supplied to the charging facility when charging is performed for the charging facility that is reserved for charging to the current value Ir that is the sum of the current values that are currently supplied to each of the charging facility. It is determined whether or not a current value Ir + Δi obtained by adding the maximum charging current Δi is equal to or less than a maximum allowable current Imax that is a maximum current value that can be supplied by the power source,
When the current value Ir + Δi is less than or equal to the maximum allowable current Imax, start supplying current to the charging facility reserved for charging,
When the current value Ir + Δi exceeds the maximum allowable current Imax, the charge reservation is managed as a standby state,
For each of the charging facilities, monitoring the charging duration, which is the time from the start of the supply of current to each of the power supply until the present,
When it is detected that the charging facility exists that exceeds the preset maximum charging duration Tmax, the supply of current from the power source to the charging facility is stopped,
For the charge reservation managed as a standby state after the stop, it is determined whether or not the current value Ir + Δi is equal to or less than the maximum allowable current Imax, and the current value Ir + Δi is equal to or less than the maximum allowable current Imax. In this case, supply of current to the charging facility for the charge reservation being managed is started. The charging system according to claim 1,
The control device includes:
Accepting an instruction to stop the charging of the electric vehicle by the charging facility,
Stopping the supply of current from the power source to the charging facility corresponding to the received instruction,
For the charge reservation managed as a standby state after the stop, it is determined whether or not the current value Ir + Δi is equal to or less than the maximum allowable current Imax, and the current value Ir + Δi is equal to or less than the maximum allowable current Imax. In this case, supply of current to the charging facility for the charge reservation being managed is started. The charging system according to claim 1,
The control device includes:
For each of the charging facilities, it is monitored whether or not the value of the current supplied from the power source to each of the charging facilities is equal to or lower than a charging end determination value Iend that is a threshold for determining whether or not charging is completed. ,
When detecting the charging facility in which the value of the current supplied from the power source is equal to or less than the charging end determination value Iend, the supply of the current from the power source to the charging facility is stopped,
For the charge reservation managed as a standby state after the stop, it is determined whether or not the current value Ir + Δi is equal to or less than the maximum allowable current Imax, and the current value Ir + Δi is equal to or less than the maximum allowable current Imax. In this case, supply of current to the charging facility for the charge reservation being managed is started. The charging system according to claim 1,
The control device includes:
Accepting a reservation for charging an electric vehicle by the charging facility,
This is the maximum current value that is supplied to the charging facility when charging is performed for the charging facility that is reserved for charging to the current value Ir that is the sum of the current values that are currently supplied to each of the charging facility. It is determined whether or not a current value Ir + Δi obtained by adding the maximum charging current Δi is equal to or less than a maximum allowable current Imax that is a maximum current value that can be supplied by the power source,
Simultaneous charging in which a value Nr + 1 obtained by adding 1 to the total number of connected Nr, which is the number of charging facilities currently connected to the electric vehicle, is a preset upper limit value of the number of electric vehicles that can be charged simultaneously by the charging system. It is determined whether or not the possible number Nmax or less,
When the current value Ir + Δi is less than or equal to the maximum allowable current Imax and the Nr + 1 is less than or equal to the simultaneously chargeable number Nmax, supply of current to the charging facility reserved for charging is started,
If the current value Ir + Δi exceeds the maximum allowable current Imax, or if the Nr + 1 exceeds the simultaneously chargeable number Nmax, the charge reservation is managed as a standby state,
For each of the charging facilities, monitoring the charging duration, which is the time from the start of the supply of current to the respective from the power supply until the present,
When it is detected that the charging facility exists that exceeds the preset maximum charging duration Tmax, the supply of current from the power source to the charging facility is stopped,
After the stop, for the charge reservation managed as a standby state, it is determined whether the current value Ir + Δi is equal to or less than the maximum allowable current Imax and the Nr + 1 is equal to or less than the simultaneously chargeable number Nmax. If the current value Ir + Δi is less than or equal to the maximum allowable current Imax and the Nr + 1 is less than or equal to the simultaneously chargeable number Nmax, supply current to the charging facility for the charge reservation being managed. A charging system characterized by starting. A power supply for supplying power for charging the electric vehicle;
A charging facility for charging the electric vehicle with electric power supplied from the power source;
A control device that acquires a current value supplied to each of the charging facilities, and controls supply of current from the power source to each of the charging facilities;
A charging method using an electric vehicle charging system comprising:
The control device is
Accepting a reservation for charging an electric vehicle by the charging facility,
This is the maximum current value that is supplied to the charging facility when charging is performed for the charging facility that is reserved for charging to the current value Ir that is the sum of the current values that are currently supplied to each of the charging facility. It is determined whether or not a current value Ir + Δi obtained by adding the maximum charging current Δi is equal to or less than a maximum allowable current Imax that is a maximum current value that can be supplied by the power source,
When the current value Ir + Δi is less than or equal to the maximum allowable current Imax, start supplying current to the charging facility reserved for charging,
When the current value Ir + Δi exceeds the maximum allowable current Imax, the charge reservation is managed as a standby state,
For each of the charging facilities, monitoring the charging duration, which is the time from the start of the supply of current to each of the power supply until the present,
When it is detected that the charging facility exists that exceeds the preset maximum charging duration Tmax, the supply of current from the power source to the charging facility is stopped,
For the charge reservation managed as a standby state after the stop, it is determined whether or not the current value Ir + Δi is equal to or less than the maximum allowable current Imax, and the current value Ir + Δi is equal to or less than the maximum allowable current Imax. In this case, supply of current to the charging facility for the charging reservation being managed is started. The charging method according to claim 5,
The control device is
Accepting an instruction to stop the charging of the electric vehicle by the charging facility,
Stopping the supply of current from the power source to the charging facility corresponding to the received instruction,
For the charge reservation managed as a standby state after the stop, it is determined whether or not the current value Ir + Δi is equal to or less than the maximum allowable current Imax, and the current value Ir + Δi is equal to or less than the maximum allowable current Imax. In this case, supply of current to the charging facility for the charging reservation being managed is started. The charging method according to claim 5,
The control device is
For each of the charging facilities, it is monitored whether or not the value of the current supplied from the power source to each of the charging facilities is equal to or lower than a charging end determination value Iend that is a threshold for determining whether or not charging is completed. ,
When detecting the charging facility in which the value of the current supplied from the power source is equal to or less than the charging end determination value Iend, the supply of the current from the power source to the charging facility is stopped,
For the charge reservation managed as a standby state after the stop, it is determined whether or not the current value Ir + Δi is equal to or less than the maximum allowable current Imax, and the current value Ir + Δi is equal to or less than the maximum allowable current Imax. In this case, supply of current to the charging facility for the charging reservation being managed is started. The charging method according to claim 5 ,
The control device is
Accepting a reservation for charging an electric vehicle by the charging facility,
This is the maximum current value that is supplied to the charging facility when charging is performed for the charging facility that is reserved for charging to the current value Ir that is the sum of the current values that are currently supplied to each of the charging facility. It is determined whether or not a current value Ir + Δi obtained by adding the maximum charging current Δi is equal to or less than a maximum allowable current Imax that is a maximum current value that can be supplied by the power source,
Simultaneous charging in which a value Nr + 1 obtained by adding 1 to the total number of connected Nr, which is the number of charging facilities currently connected to the electric vehicle, is a preset upper limit value of the number of electric vehicles that can be charged simultaneously by the charging system. It is determined whether or not the possible number Nmax or less,
When the current value Ir + Δi is less than or equal to the maximum allowable current Imax and the Nr + 1 is less than or equal to the simultaneously chargeable number Nmax, supply of current to the charging facility reserved for charging is started,
If the current value Ir + Δi exceeds the maximum allowable current Imax, or if the Nr + 1 exceeds the simultaneously chargeable number Nmax, the charge reservation is managed as a standby state,
For each of the charging facilities, monitoring the charging duration, which is the time from the start of the supply of current to the respective from the power supply until the present,
When it is detected that the charging facility exists that exceeds the preset maximum charging duration Tmax, the supply of current from the power source to the charging facility is stopped,
After the stop, for the charge reservation managed as a standby state, it is determined whether the current value Ir + Δi is equal to or less than the maximum allowable current Imax and the Nr + 1 is equal to or less than the simultaneously chargeable number Nmax. If the current value Ir + Δi is less than or equal to the maximum allowable current Imax and the Nr + 1 is less than or equal to the simultaneously chargeable number Nmax, supply current to the charging facility for the charge reservation being managed. A charging method characterized by starting.

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