JP2012228041A - Charge control device for electric vehicle, charge control method for electric vehicle, and charging system for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To successively obtain information on the number of chargers capable of being used within a contract demand for charging electric vehicles.SOLUTION: A charge control device 20 successively measures a power consumption of a facility 1 including one or a plurality of charging units 30 for charging an on-vehicle power storage 62 of an electric vehicle 60. The charge control device 20 figures out, on a basis of the sum of power consumption which is measured from the start time point to a prescribed time point in a determination object period for determining the contract demand of the facility 1, a virtual contract demand indicating an available electric power within the contract demand from the prescribed time point to the end time point in the determination object period. The charge control device 20, accepting the virtual contract demand or an installed electric power of the facility 1 whichever is the smaller as a maximum available electric power, determines the number of the charging units 30 allowed to be used at the maximum available electric power among the charging units 30 included in the facility 1.

Description

  The present invention relates to an electric vehicle charging control apparatus, an electric vehicle charging control method, and an electric vehicle charging system.

  For charging an in-vehicle storage battery of an electric vehicle, a quick charger capable of shortening the charging time may be used (see, for example, Patent Document 1 below). In order to improve the charging infrastructure for electric vehicles, it is considered to install quick chargers in facilities such as housing complexes, commercial facilities, and public facilities.

JP 2009-77557 A

  However, the electric power used by the quick charger at the initial stage of charging is large. For example, when a plurality of quick chargers are used at the same time, the contract electric power set for the facility may be exceeded.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a charging control device for an electric vehicle that can sequentially know the number of chargers that can be used for charging an electric vehicle within the range of contract power. It is another object of the present invention to provide an electric vehicle charging control method and an electric vehicle charging system.

  In order to achieve the above object, a charging control device for an electric vehicle according to an aspect of the present invention is a measuring unit that sequentially measures the power consumption of a facility that includes one or more chargers that charge a vehicle-mounted storage battery of an electric vehicle. And the end of the determination target period from the given time based on the sum of the power consumption measured by the measuring means from the start time of the determination target period for determining the contract power of the facility to the given time The calculation means for calculating the virtual contract power indicating the power that can be used within the range of the contract power up to the time point, the smaller one of the virtual contract power and the power facility capacity of the facility as the maximum available power, And determining means for determining the number of chargers that can be used under the maximum available power among the chargers included in the facility.

  In one aspect of the present invention, the charging control device for the electric vehicle is calculated based on the number of available chargers determined by the determining unit when receiving a charging request from the electric vehicle. It further comprises notification means for notifying charging power that can be provided to the electric vehicle.

  In one aspect of the present invention, the charging control device for an electric vehicle includes a charging voltage and a charging current specified by the electric vehicle after notifying charging power that can be provided to the electric vehicle by the notification unit. Charging conditions receiving means for receiving conditions; and charging control means for controlling the charger based on the charging conditions received by the charging condition receiving means to charge the in-vehicle storage battery of the electric vehicle. And

  In one aspect of the present invention, the facility further includes a storage battery that is charged by the one or more chargers, and the notifying unit charges the number of available chargers determined by the determining unit. The chargeable power that can be provided, which is calculated by adding the storage capacity of the storage battery to the value obtained by multiplying the power capacity of the storage device, is notified.

  Moreover, in one aspect of the present invention, the determination unit determines the virtual contract power and the power facility capacity of the facility when the given time does not exceed a predetermined time in the determination target period. The smaller one is set as the maximum available power, and if the given time exceeds a predetermined time in the determination target period, the contracted power is set as the maximum available power and the available charger is used. It is characterized by determining the number of units.

  Moreover, in one aspect of the present invention, the calculation means obtains a value obtained by subtracting the sum of the power consumption from the amount of power obtained by multiplying the contract power and the time length from the start time of the determination target period to a given time. The sum of the surplus power calculated by dividing by the time length from the given time to the end time and the contract power is calculated as the virtual contract power.

  In one aspect of the present invention, the determination unit is a value obtained by subtracting any one of the power consumption measured by the measurement unit, the contract power, or a predetermined predicted power consumption from the maximum available power. Further, the number of chargers that can be used is determined based on a quotient obtained by multiplying by a predetermined weight coefficient of 0 or more and 1 or less and then divided by the power capacity of the charger.

  In one aspect of the present invention, the given time point is a time point when a charge request from the electric vehicle is received.

  In addition, an electric vehicle charging control method according to an aspect of the present invention includes a measurement step of sequentially measuring power consumption of a facility including one or a plurality of chargers for charging a vehicle storage battery of the electric vehicle, and a contract for the facility. Based on the sum of power consumption measured in the measurement step from the start point of the determination target period for determining power to the given point, the contract power from the given point to the end point of the determination target period A calculation step of calculating virtual contract power indicating power that can be used within the range of the above, and a charger included in the facility, with the smaller one of the virtual contract power and the power facility capacity of the facility as the maximum available power And determining the number of chargers that can be used under the maximum available power.

  In addition, an electric vehicle charging system according to an aspect of the present invention includes one or more chargers that charge a vehicle storage battery of an electric vehicle, and a charge control device that controls the one or more chargers. The charging control device includes a measuring unit that sequentially measures power consumption of the facility including the one or more chargers, and a predetermined time point from a start point of a determination target period for determining contract power of the facility. Calculation means for calculating virtual contract power indicating power available within the range of the contract power from the given time point to the end time point of the determination target period based on the sum of power consumption measured by the measurement means And, the smaller of the virtual contract power and the power equipment capacity of the equipment as the maximum available power, the number of chargers that can be used under the maximum available power among the chargers included in the equipment Characterized by comprising determination means for constant for, a.

  According to one aspect of the present invention, it is possible to sequentially know the number of chargers that can be used for charging an electric vehicle within the range of contract power. In addition, the electric vehicle can be efficiently charged using a charger that can be used within the contract power range.

It is a system configuration figure of equipment provided with a charge system concerning this embodiment. It is a functional block diagram of a charge control apparatus. It is a figure which shows an example of the data memorize | stored in a memory | storage part. It is a figure which shows an example of the functional block which comprises the output possible electric power determination part. It is a figure explaining virtual contract electric power. It is a sequence diagram explaining the flow of the charging process of an electric vehicle. It is a flowchart of the calculation process of output possible electric power. It is a flowchart of the charging process of an electric vehicle. It is a flowchart of the usage number determination process of a charging unit. It is a flowchart of the charge process of the storage battery in an installation.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments (hereinafter referred to as embodiments) for carrying out the invention will be described with reference to the drawings.

  In FIG. 1, the system block diagram of the installation 1 provided with the charging system 10 which concerns on this embodiment was shown. As shown in FIG. 1, the facility 1 includes a load 5, a power consumption meter 7, a charging system 10 that charges an electric vehicle 60, and an in-facility storage battery 50, and each device included in the facility 1. Is supplied with power from the AC power source 3. A system including the charging system 10, the power consumption measuring instrument 7, and the in-facility storage battery 50 is referred to as a total charging system 12.

  The load 5 is, for example, an illumination, an air conditioner, various information devices, or the like. The power consumption meter 7 detects the current and voltage supplied from the AC power supply 3 to the equipment 1 side, sequentially measures the power consumption consumed on the equipment 1 side, and outputs the measured power consumption to the charging control device 20. To do. For example, the power consumption measurement by the power consumption meter 7 may be performed at predetermined time intervals.

  The charging system 10 includes a plurality of charging units 30, a plurality of bidirectional conversion units 40 that connect output terminals of the plurality of charging units 30 and a plurality of in-facility storage batteries 50, and both the plurality of charging units 30 and the plurality of charging units 30. And a charge control device 20 that controls the direction conversion unit 40. In the present embodiment, there are a plurality of in-facility storage batteries 50 and bidirectional conversion units 40 provided in the overall charging system 12, but the number of the in-facility storage batteries 50 and bidirectional conversion units 40 provided in the overall charging system 12. May be 0 or 1.

  The charging unit 30 includes an AC / DC converter that converts an alternating voltage (for example, AC 200V) into a predetermined direct voltage (DC 50 to 500V) and outputs the converted voltage. The DC voltage (charging voltage) output from the charging unit 30 may be set to a specified voltage received from the connected electric vehicle 60, for example. Further, when the electric vehicle 60 is not charged and the storage capacity of the in-facility storage battery 50 is less than the threshold value, a current is output from the charging unit 30 to the bidirectional conversion unit 40, and the in-facility storage battery 50 may be charged.

  The charging control device 20 performs output control of each charging unit 30, monitoring and charging / discharging control of the storage capacity of the storage battery 50 in the facility, communication with the electric vehicle 60 and the power consumption measuring instrument 7, and the like. Details of processing performed in the charging control device 20 will be described later.

  The in-facility storage battery 50 is charged by the charging unit 30 and supplies a charging current to the electric vehicle 60. The discharge current from the in-facility storage battery 50 is converted into a predetermined voltage by the bidirectional conversion unit 40 and supplied to the electric vehicle 60. The charging control device 20 charges the in-facility storage battery 50 in a time zone where the power demand is low and the electricity price is low, and uses the stored electricity for charging the electric vehicle 60, so that the electric vehicle is more economical. 60 can be charged.

  The electric vehicle 60 includes an in-vehicle storage battery 62, a motor that drives using the electric power of the in-vehicle storage battery 62, wheels, a power transmission system that transmits the power of the motor to the wheels, various accessories, a control unit that controls each unit, and the like. The control unit of the electric vehicle 60 and the charging control device 20 may communicate at the time of charging, and the charging condition according to the state of the in-vehicle storage battery 62 of the electric vehicle 60 may be transmitted to the charging control device 20.

  FIG. 2 shows a functional block diagram of the charging control device 20. As shown in FIG. 2, the charging control device 20 includes a measurement data acquisition unit 200, a storage unit 202, a charging unit control unit 204, a storage battery control unit 206, an electric vehicle communication unit 208, an outputable power determination unit 210, and An electric vehicle charging control unit 212 is provided.

  The functions of the above-described units included in the charging control device 20 are information storage that can be read by a computer including control means such as a CPU, storage means such as a magnetic disk and memory, and communication means that communicates data with an external device. It may be realized by reading and executing a program stored in a medium. The program may be supplied to the charging control device 20 as a computer by an information storage medium such as an optical disk, a magnetic disk, a magnetic tape, a magneto-optical disk, or a flash memory, or supplied via a data communication network such as the Internet. It may be done.

  The measurement data acquisition unit 200 acquires measurement data (a set of measurement time and power consumption data) that is sequentially measured by the power consumption meter 7. For example, the measurement data acquisition unit 200 may acquire measurement data from the power consumption measuring instrument 7 at predetermined time intervals, or may be acquired by the power consumption measuring instrument 7 at a timing specified by the measurement data acquisition unit 200. It is good also as acquiring the measured measurement data. The measurement data acquisition unit 200 may receive and acquire measurement data from the power consumption measuring device 7 by wireless or wired communication.

  The storage unit 202 stores data and programs, and is also used as a work memory for the charging control device 20. FIG. 3 shows an example of data stored in the storage unit 202. As shown in FIG. 3, the storage unit 202 includes a power consumption record data storage unit 202A, a demand prediction data storage unit 202B, a contract power data storage unit 202C, an electric vehicle charging pattern storage unit 202D, and an electric vehicle charging flag storage. Part 202E is included. Hereinafter, data stored in each unit will be described.

  The power consumption result data storage unit 202 </ b> A stores the measurement data sequentially acquired by the measurement data acquisition unit 200. For example, the power consumption record data storage unit 202A stores a table in which measurement time and power consumption (W) are associated with each other based on measurement data sequentially acquired by the measurement data acquisition unit 200.

  The demand prediction data storage unit 202B stores demand prediction data in which the power demand of the facility 1 is predicted. For example, the demand prediction data storage unit 202B stores a table associating date / time information (month, day, time) and predicted power consumption. The predicted power consumption may be calculated based on the date and time recorded in the past for the facility 1 and the history of power consumption. For example, the average power consumption for the same date and time in the past several years is used as the predicted value. Good.

  The contract power data storage unit 202C stores contract power data determined for the facility 1. For example, the contract power data storage unit 202C stores contract power (Pc) and data of a determination target period for determining contract power. The data of the determination target period may include a cycle (for example, 30 minutes) and a time measurement start time (for example, every 30 minutes from midnight).

  The electric vehicle charging pattern storage unit 202D stores charging pattern data representing the relationship between charging power and charging time when the electric vehicle 60 is charged. For example, the electric vehicle charging pattern storage unit 202D may store a charging pattern representing the relationship between the charging power and the charging time for each vehicle type of the electric vehicle 60 (or the model of the in-vehicle storage battery 62). In the present embodiment, the electric vehicle charging pattern storage unit 202D is provided in the charging control device 20, but the electric vehicle charging pattern is not necessarily required when a charging pattern instruction is received from the electric vehicle 60 or the charging pattern can be acquired. The storage unit 202D may not be provided.

  The electric vehicle charging flag storage unit 202E stores a charging flag indicating whether or not the electric vehicle 60 is connected to the charging system 10 and is being charged. For example, the electric vehicle charging flag storage unit 202E stores a true / false value as a charging flag that is ON (true) when the electric vehicle 60 is charged, and OFF (false) otherwise. Good.

  The charging unit control unit 204 controls the operation of each charging unit 30 in the charging system 10. For example, the charging unit control unit 204 controls on and off of each charging unit 30 and further sets a charging voltage and a charging current for the charging unit 30 that is turned on.

  The storage battery control unit 206 acquires data from the in-facility storage battery 50 connected to the charging system 10 and monitors the state of the in-facility storage battery 50, and controls the bidirectional conversion unit 40 to charge / discharge the in-facility storage battery 50. Control. For example, the storage battery control unit 206 sequentially acquires the storage capacity (SOC) of the storage battery 50 in the facility, and starts charging the storage battery 50 in the facility when the storage capacity falls below the charge start capacity (SOC1). When the capacity reaches the charge stop capacity (SOC2), the charging of the in-facility storage battery 50 is stopped. Further, when the electric vehicle 60 is charged, the storage battery control unit 206 discharges the in-facility storage battery 50 and mounts the electric vehicle 60 when the storage capacity of the in-facility storage battery 50 is larger than the discharge stop capacity (SOC3). The storage battery 62 may be charged. The relationship between the charge start capacity (SOC1), the charge stop capacity (SOC2), and the discharge stop capacity (SOC3) may be, for example, SOC3 <SOC1 <SOC2. Further, the storage battery control unit 206 refers to the value of the flag stored in the electric vehicle charging flag storage unit 202E, and controls to charge the in-facility storage battery 50 only when the electric vehicle 60 is not charged. It is good to do.

  The electric vehicle communication unit 208 communicates with the electric vehicle 60 connected to the charging system 10 via a charging cable. For example, the electric vehicle communication unit 208 receives a charge request from the electric vehicle 60, and performs processing such as transmitting outputable power determined by the outputable power determination unit 210 described later to the electric vehicle 60.

  Outputtable power determining section 210 determines charging power that can be output from charging system 10 at a given time. For example, the given time point may be a time point when the charging request from the electric vehicle 60 is received by the electric vehicle communication unit 208, or may be any other time point. FIG. 4 shows an example of functional blocks constituting the outputtable power determining unit 210. As illustrated in FIG. 4, the outputable power determination unit 210 includes a remaining time determination unit 210A, a virtual contract power calculation unit 210B, a maximum available power determination unit 210C, an operable number calculation unit 210D, and an outputable power calculation unit. 210E. Hereinafter, functions of each unit will be described.

  The remaining time determination unit 210A determines whether or not the given time exceeds a predetermined time (limit time: T1) from the start time of the determination target period in the contract power determination target period to which the given time belongs. Determine. The time limit T1 may be determined based on the time required for the charging to be completed to a predetermined rate (for example, 50%) in the charging pattern stored in the electric vehicle charging pattern storage unit 202D, for example. In the present embodiment, the charging control device 20 determines the time limit T1 from the electric vehicle charging pattern storage unit 202D. However, the time limit T1 may be determined based on the charging pattern acquired from the electric vehicle 60. The time limit T1 determined by the electric vehicle 60 may be acquired.

  The virtual contract power calculation unit 210B ends from the given time of the determination target period based on the sum of the power consumption measured from the start time of the determination target period for determining the contract power of the facility 1 to the given time The virtual contract power indicating the power that can be used within the range of the contract power by the time is calculated. The virtual contract power may be calculated only when the remaining time determination unit 210A determines that the given time point does not exceed the time limit T1.

FIG. 5 is a diagram illustrating virtual contract power. In FIG. 5, the horizontal axis represents time, and the vertical axis represents power. In FIG. 5, assuming that a given time point is Ts, the solid line indicates the actual value of the power consumption Pd measured up to the given time point Ts. In addition, Pc in FIG. 5 indicates contract power, and the height Pdm of the region B is calculated so that the areas of the region A and the region B in FIG. 5 are the same. Pdm is surplus power, and is determined so that the average power consumption in the determination target period is equal to or less than Pc even if Pdm is consumed from Ts to Tn which is the end point of the determination target period. Specifically, as shown in the following formula (1), the virtual contract power calculation unit 210B calculates the contract power (Pc) and the time length (Ts) from the start of the determination target period to a given time. The value obtained by subtracting the sum of the power consumption (Pd) from the multiplied power amount is divided by the time length (Te−Ts) from a given time point (Ts) to the end time point (Te), and the remaining power (Pdm) Is calculated. Then, the virtual contract power calculation unit 210B adds the surplus power (Pdm) and the contract power (Pc) to obtain the virtual contract power (Pcv).

  The maximum available power determination unit 210C is provided based on the determination result by the remaining time determination unit 210A, the virtual contract power (Pcv) calculated by the virtual contract power calculation unit 210B, and the power facility capacity (Pf) of the facility 1. The maximum available power at the time Ts is determined. For example, if the remaining time determination unit 210A determines that the given time Ts exceeds the time limit T1, the maximum available power determination unit 210C uses the maximum available power (Pmax) as the contract power (Pc). ). Further, the maximum available power determination unit 210C determines that the maximum available power if the virtual contract power (Pcv) does not exceed the power facility capacity (Pf) when the given time Ts does not exceed the time limit T1. (Pmax) is the virtual contract power (Pcv), and if the virtual contract power (Pcv) exceeds the power facility capacity (Pf), the maximum available power (Pmax) is the power facility capacity (Pf).

The operable number calculation unit 210D determines the number (operable number) of the charging units 30 that can be operated under the maximum available power determined by the maximum available power determination unit 210C. For example, the operable number calculation unit 210D may calculate the operable number Nmax (Nmax is an integer) by the following equation (2). At this time, α (safety factor) is a constant of 0 or more and 1 or less, Pmax is the maximum available power, P0 is the reference power, and PUmax is the maximum output of the charging unit 30. As the reference power, any one of the power consumption Pd, the contract power Pc, the predicted power consumption Pb based on the demand prediction data measured at a given time Ts, or an average value of these may be used. .
Nmax = α · (Pmax−P0) / PUmax (2)

The outputable power calculation unit 210E charges the electric vehicle 60 based on the operable number of the charging units 30 calculated by the operable number calculation unit 210D and the storage capacity of the in-facility storage battery 50 acquired by the storage battery control unit 206. Calculate the power that can sometimes be output. For example, the outputtable power calculating unit 210E may calculate the outputable power PEVmax by the following equation (3). Here, PUmax represents the maximum output of the charging unit 30, Nmax represents the number of operable charging units 30, PBmax represents the maximum discharge power of the in-facility storage battery 50, and NBmax represents the number of in-facility storage batteries 50 that can be discharged. Outputtable power calculating section 210E sets NBmax as the number of in-facility storage batteries 50 having a storage capacity larger than the discharge stop capacity.
PEVmax = PUmax · Nmax + PBmax · NBmax (3)

  The electric vehicle communication unit 208 transmits the outputable power calculated by the outputable power calculation unit 210E to the electric vehicle 60, and the charging voltage selected within the range of the transmitted outputable power from the electric vehicle 60 and A charging condition including a charging current is received.

  The electric vehicle charging control unit 212 controls charging of the in-vehicle storage battery of the electric vehicle 60 connected to the charging system 10 via the charging cable. For example, the electric vehicle charging control unit 212 sets the discharge voltage and the discharge current from the charging unit 30 and the storage battery 50 in the facility based on the charging condition received by the electric vehicle communication unit 208, and the electric vehicle 60 is mounted on the vehicle. Start charging the storage battery. At this time, the electric vehicle charging control unit 212 updates the flag stored in the electric vehicle charging flag storage unit 202E to ON, and charging of the in-vehicle storage battery of the electric vehicle 60 is completed (including normal termination or abnormal termination). The flag is updated to OFF.

  Next, the flow of the charging process of the electric vehicle 60 will be described with reference to the sequence diagram shown in FIG.

  As shown in FIG. 6, the charging control device 20 sequentially measures the power consumption supplied from the AC power supply 3 to the facility 1 (S1001), and stores the measured power consumption (S1002). Then, when the charging control device 20 receives a charging request from the electric vehicle 60 connected via the charging cable (S1003), the charging control device 20 calculates electric power that can be output to the electric vehicle 60 with the received time as a reference time ( S1004). Here, the details of the processing of S1004 will be described with reference to the flowchart of FIG.

  FIG. 7 shows a flowchart of the calculation process of output possible power. As shown in FIG. 7, the charging control device 20 determines whether or not the time limit T1 is exceeded in the determination target period including the reference time Ts (S2001), and when it is determined that the time is not exceeded. (S2001: Y), the sum of the surplus power Pdm calculated based on the equation (1) and the contract power Pc is calculated as the virtual contract power PCv (S2002). Further, when the calculated virtual contract power PCv falls below the power equipment capacity Pf (S2003: Y), the charging control device 20 sets the virtual contract power PCv to the maximum available power Pmax (S2004), and the virtual contract power PCv. Is equal to or greater than the power equipment capacity Pf, the power equipment capacity Pf is set as the maximum available power Pmax (S2005). Further, when it is determined in S2001 that the reference time Ts exceeds the time limit T1 (S2001: N), the charging control device 20 sets the contract power Pc of the facility 1 as the maximum available power Pmax ( S2006).

  Next, the charging control device 20 calculates the operable number Nmax of the charging units 30 based on the formula (2) (S2007). Then, the charging control device 20 sets the number of in-facility storage batteries 50 in which the storage capacity of the in-facility storage battery 50 is larger than the discharge stop capacity to the dischargeable number NBmax (1 in this embodiment) of the in-facility storage battery 50. (S2008), the outputable power is calculated based on the equation (3) (S2009), and the process returns.

  Here, returning to the sequence diagram of FIG. 6 again, the description will be continued. The charging control device 20 notifies the calculated electric power that can be output to the electric vehicle 60 (S1005), and then receives the charging condition set by the electric vehicle 60 (S1006). Note that the electric vehicle 60 may notify the charging control device 20 of a charging condition in which the maximum power is lower than the outputable power notified from the charging control device 20.

  The charging control device 20 calculates and displays the charging time based on the received charging condition (S1007), updates the charging flag to ON (S1008), and executes the charging process (S1009). Here, the details of the processing of S1009 will be described with reference to the flowchart of FIG.

  In FIG. 8, the flowchart of the charge process of the electric vehicle 60 was shown. As shown in FIG. 8, the charge control device 20 is a case where there is an in-facility storage battery 50 (S3001: Y), and the in-facility storage battery 50 whose storage capacity (SOC) is equal to or less than the discharge stop capacity (SOC3). If there is (S3002: Y), the storage capacity is less than the discharge stop capacity from the number of storage batteries 50 in the facility (nb, nb is an integer of 0 ≦ nb ≦ NBmax, and the initial value is NBmax) The number of storage batteries 50 (nbx) is reduced (S3003), and it is determined whether or not the electric vehicle 60 can be continuously charged with the reduced number of storage batteries 50 in the facility (nb) (S3004). As a result, when it is determined that the storage can be continued (S3004: Y), the use of the in-facility storage battery 50 whose storage capacity is equal to or less than the discharge stop capacity is stopped (S3005), the process returns to S3001, and it is determined that the storage cannot be continued. In this case (S3004: N), the charging process may be temporarily stopped (S3006), and the charging process may be restarted from the beginning (for example, from S1003).

  Moreover, the charge control apparatus 20 is a case where there is no in-facility storage battery 50 to discharge (S3001: N), or a case where there is an in-facility storage battery 50 (S3001: Y), and the storage capacity of the in-facility storage battery 50 is If it is not equal to or less than the discharge stop capacity (S3002: N), a process for optimizing the number of charging units 30 used is executed (S3007). Details of the process for optimizing the number of charging units 30 used will be described later.

  When changing the number of the charging units 30 to be used in S3007 (S3008: Y), the charging control device 20 temporarily stops the charging process (S3006) and starts the charging process from the beginning. If the number of charging units 30 used is not changed in S3007 (S3008: N), the charging control device 20 proceeds to S3009, and determines that charging is not completed (S3009: N). ), The process returns to S3001, and when it is determined that the charging is completed (S3009: Y), the charging is stopped (S3010) and the process returns.

  Here, it returns to the sequence diagram of FIG. 6 again. The charging control device 20 displays the result of the charging process of the electric vehicle 60 (S1010), updates the charging flag to OFF (S1011), and ends the process.

  Here, an example of the process for optimizing the number of units used for the charging units 30 described above will be described with reference to the flowchart shown in FIG.

As shown in FIG. 9, when the number n of operating charging units 30 is 1 or more (S4001: Y), the charging control device 20 reduces the charging unit 30 represented by the following equation (4). It is determined whether or not the above is satisfied (S4002). In Expression (4), t is the time from the determination start time to a given time, Pc is the contract power, β is a weighting factor, for example, −1 <β <1, and Pd is the power consumption measured sequentially. It is.

If it is determined that the reduction condition of the charging unit 30 is satisfied (S4002: Y), the charging control device 20 decreases the number of operating units n by 1 (S4003) and returns. Moreover, when it determines with the charge control apparatus 20 not satisfy | filling the reduction | decrease conditions of the charging unit 30 (S4002: N), when the present driving | operation number n is an upper limit number (for example, number of charging units mounted). Is returned (S4004: Y), and if it is not the upper limit number (S4004: N), it is determined whether or not the increase condition of the charging unit 30 shown in the following equation (5) is satisfied (S4006). In Expression (5), t is the time from the determination start time to a given time, Pc is the contract power, γ is a weighting factor, for example, −1 <γ <1, and Pd is the power consumption measured sequentially. It is. When it is determined that the increase condition of the charging unit 30 is satisfied (S4006: Y), the charging control device 20 increases the number of operating units by one (S4007), returns, and satisfies the increasing condition of the charging unit 30. If it is determined that there is not (S4006: N), the process directly returns.

Next, the charging process of the in-facility storage battery 50 will be described. In FIG. 10, the flowchart of the charge process of the storage battery 50 in an installation was shown. As shown in FIG. 10, the charge control device 20 acquires the storage capacity (SOC) of the in-facility storage battery 50 (S5001), and the acquired storage capacity (SOC) is equal to or less than the charge start capacity (SOC1). (S5002: Y), charging of the in-facility storage battery 50 is started (S5003). For example, when the stop condition for the charging process of the in-facility storage battery 50 represented by the following formula (6) is satisfied (S5004: Y), the charging control device 20 stops the charging (S5005) and ends the process. In Equation (6), t is the time from the determination start time to a given time, Pc is the contract power, δ is a weighting coefficient, for example, −1 <δ <1, and Pd is the power consumption measured sequentially. It is. In addition, when the charge control device 20 does not satisfy the stop condition (S5004: N) and the charge flag is On (S5006: Y), the charge control device 20 stops the charge (S5005) and ends the process. To do. If the charge flag is not On (S5006: N) and the storage capacity (SOC) is not equal to or greater than the charge stop capacity (SOC2) (S5007: N), the charge control device 20 returns to S5004. If the charging is continued and the storage capacity (SOC) becomes equal to or greater than the charging stop capacity (SOC2) (S5007: Y), the charging is stopped (S5005) and the process is terminated. In S5002, when the storage capacity (SOC) is not equal to or less than the charging start capacity (SOC1) (S5002: N), the process may be terminated without performing charging.

  According to the charging system 10 of the electric vehicle 60 according to the present embodiment described above, the electric vehicle 60 can be efficiently charged within a range not exceeding the contract power. Moreover, the electric vehicle 60 can be more efficiently and economically charged by using the in-facility storage battery 50 charged with night power or the like for charging the electric vehicle 60.

  Further, the present invention is not limited to the above embodiment. For example, in the above embodiment, when the charging request for the electric vehicle 60 is received, the operable number of the charging units 30 and the outputable power are calculated. However, the operable number of the charging units 30 and the outputable power are calculated. May be sequentially calculated and stored, and when the electric vehicle 60 requests charging, the latest number of operable chargeable units 30 and outputable power may be output. In the above embodiment, charging is performed under the charging conditions set by the electric vehicle 60. However, the charging control device is based on the number of operable charging units 30 and the output power that are calculated by the charging control device 20. The electric vehicle 60 may be charged according to the charging conditions set by 20.

DESCRIPTION OF SYMBOLS 1 Equipment, 3 AC power supply, 5 Loads, 7 Power consumption measuring device, 10 Charging system, 12 Comprehensive charging system, 20 Charging control apparatus, 30 Charging unit, 40 Bidirectional conversion unit, 50 Storage battery in equipment, 60 Electric vehicle, 62 In-vehicle storage battery, 200 measurement data acquisition unit, 202 storage unit, 202A power consumption performance data storage unit, 202B demand prediction data storage unit, 202C contract power data storage unit, 202D electric vehicle charging pattern storage unit, 202E electric vehicle charging flag storage Unit, 204 charging unit control unit, 206 storage battery control unit, 208 electric vehicle communication unit, 210 output available power determination unit, 210A remaining time determination unit, 210B virtual contract power calculation unit, 210C maximum available power determination unit, 210D operation Possible number calculation unit, 210E Output possible power calculation unit, 212 Gas-vehicle charging control unit.

Claims (10)

Measuring means for sequentially measuring the power consumption of equipment including one or a plurality of chargers for charging an in-vehicle storage battery of an electric vehicle;
Based on the sum of power consumption measured by the measuring means from the start point of the determination target period for determining the contract power of the facility to the predetermined point, from the given point of time to the end point of the determination target period Calculating means for calculating virtual contract power indicating power available within the range of the contract power;
Determine the number of chargers that can be used under the maximum available power among the chargers included in the equipment, with the smaller of the virtual contract power and the power equipment capacity of the equipment as the maximum available power A charging control device for an electric vehicle, comprising: a determination unit; When receiving a charge request from the electric vehicle, the information processing device further includes notification means for notifying charging power that can be provided to the electric vehicle calculated based on the number of available chargers determined by the determining means. The charging control device for an electric vehicle according to claim 1, wherein the charging control device is an electric vehicle. Charging condition receiving means for receiving a charging condition including a charging voltage and a charging current designated from the electric vehicle after notifying charging power that can be provided to the electric vehicle by the notification means;
The electricity according to claim 2, further comprising charge control means for charging the in-vehicle storage battery of the electric vehicle by controlling the charger based on the charge condition accepted by the charge condition accepting means. Automobile charging control device. The facility further includes a storage battery charged by the one or more chargers,
The notifying means notifies the available charging power calculated by adding the storage capacity of the storage battery to a value obtained by multiplying the number of available chargers determined by the determining means by the power capacity of the charger. The charging control device for an electric vehicle according to claim 2 or 3, When the given time does not exceed a predetermined time in the determination target period, the determining means uses the smaller of the virtual contract power and the power equipment capacity of the equipment as the maximum available power When the given time exceeds a predetermined time in the determination target period, the number of available chargers is determined using the contract power as the maximum available power. The charging control device for an electric vehicle according to any one of claims 1 to 4. The calculation means calculates a value obtained by subtracting the sum of the power consumption from the amount of power obtained by multiplying the contract power and the time length from the start time of the determination target period to a given time, from the given time to the end. 6. The electric vehicle charging control according to claim 1, wherein the virtual contract power is calculated as a sum of a surplus power calculated by dividing by a length of time until a time point and the contract power. apparatus. The determination means has a predetermined value of 0 or more to a value obtained by subtracting any one of the power consumption measured by the measurement means, the contract power, or the predetermined predicted power consumption from the maximum available power. The electric vehicle according to any one of claims 1 to 6, wherein the number of available chargers is determined based on a quotient obtained by multiplying the following weighting factor and then dividing by the power capacity of the charger. Charge control device. The charging control device for an electric vehicle according to any one of claims 1 to 7, wherein the given time is a time when a charging request is received from the electric vehicle. A measurement step for sequentially measuring the power consumption of the facility including one or more chargers for charging the on-vehicle storage battery of the electric vehicle;
Based on the sum of the power consumption measured in the measurement step from the start point of the determination target period for determining the contract power of the facility to the given time point, from the given time point to the end point of the determination target period A calculation step of calculating virtual contract power indicating power available within the range of the contract power;
Determine the number of chargers that can be used under the maximum available power among the chargers included in the equipment, with the smaller of the virtual contract power and the power equipment capacity of the equipment as the maximum available power A charging control method for an electric vehicle, comprising: a determining step. One or more chargers for charging an onboard storage battery of an electric vehicle;
A charge control device for controlling the one or more chargers,
The charge control device includes:
Measuring means for sequentially measuring the power consumption of the equipment including the one or more chargers;
Based on the sum of power consumption measured by the measuring means from the start point of the determination target period for determining the contract power of the facility to the predetermined point, from the given point of time to the end point of the determination target period Calculating means for calculating virtual contract power indicating power available within the range of the contract power;
Determine the number of chargers that can be used under the maximum available power among the chargers included in the equipment, with the smaller of the virtual contract power and the power equipment capacity of the equipment as the maximum available power An electric vehicle charging system comprising: a determination unit;

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