Charging system

Abstract

The invention provides a charging system. The charging system is configured so as to be able to charge each of the first power storage device and the second power storage device using external power supplied from an external power source to the facility. The first power storage device is mounted on the vehicle. The second power storage device is configured so as to be able to supply the power stored in the second power storage device to the facility. A charging system is provided with a control device that controls the charging of each of a first power storage device and a second power storage device. The control device is configured so as to urge a user of the vehicle requesting charging of the first power storage device to select whether or not to permit restriction of the requested charging, and to restrict the requested charging when the user selects a restriction of permitting charging.

Description

Technical Field

[0001] The present disclosure relates to a charging system. Background Art

[0002] Japanese Patent Application Laid-Open No. 2019-062618 discloses a charging system configured to be able to charge a first power storage device and a second power storage device (stationary battery) mounted on a vehicle using external power. The external power is supplied from an external power source (e.g., commercial power source) to a facility (e.g., a house). Further, the charging system predicts the return time of the vehicle equipped with the first power storage device and performs prior charging of the stationary battery during the period until the return time. In the prior charging, the amount of power for load leveling is previously stored in the stationary battery during the period until the return time.

[0003] The charging system described in the above Japanese Patent Application Laid-Open No. 2019-062618 predicts the return time of the vehicle and performs prior charging of the stationary battery based on the prediction result. However, it is not always easy to predict the return time of the vehicle with high accuracy. Further, in a system that predicts the return time based on information from the user of the vehicle, there is a possibility of impairing the convenience of the user due to requesting such information from the user. Further, in the case where the vehicle is charged at a facility other than a house (e.g., a commercial facility), it is difficult to apply the technology described in the above Japanese Patent Application Laid-Open No. 2019-062618. Summary of the Invention

[0004] The present disclosure provides a charging system capable of suppressing a decrease in user convenience and suppressing a peak value of the supply amount of external power to a facility from becoming excessive.

[0005] A charging system according to an aspect of the present disclosure is configured to be able to charge a first power storage device and a second power storage device respectively using external power supplied from an external power source to a facility. The first power storage device is mounted on a vehicle. The second power storage device is configured to be able to supply the power stored in the second power storage device to the facility. The charging system includes a control device that controls the charging of the first power storage device and the second power storage device respectively. The control device is configured to prompt a user of a vehicle that requests charging of the first power storage device to select whether to allow restriction of the requested charging, and to restrict the requested charging when the user selects to allow restriction of the charging.

[0006] According to the present disclosure, it is possible to provide a charging system capable of suppressing a decrease in user convenience and suppressing a peak value of the supply amount of external power to a facility from becoming excessive. Brief Description of the Drawings

[0007] Features, advantages, technical and industrial significance of embodiments of the present invention will be described as follows with reference to the accompanying drawings, where like reference numerals denote like elements.

[0008] Figure 1 FIG. is a diagram showing a charging system according to an embodiment of the present disclosure.

[0009] Figure 2 FIG. is a flowchart showing a process of vehicle charging control according to this embodiment.

[0010] Figure 3 is an illustration Figure 2 FIG. is a diagram showing a selection requirement screen used in the vehicle charging control shown.

[0011] Figure 4 FIG. is a diagram showing Figure 2 a first modification of the process flow shown.

[0012] Figure 5 FIG. is a diagram showing Figure 2 a second modification of the process flow shown.

[0013] Figure 6 FIG. is a diagram showing Figure 2 a third modification of the process flow shown. DETAILED DESCRIPTION

[0014] Embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and their description will not be repeated.

[0015] Figure 1 FIG. is a diagram showing a charging system according to this embodiment. Referring to Figure 1 , the charging system 1 includes a facility 100, a plurality of power supply devices (including power supply devices 410, 420, 430, 440, 450, 460), and peak shaving and valley filling power storage devices 510, 520. The facility 100 includes a distribution board 110, an electric load 120, a PCS (Power Conditioning System) 130, and an EMS (Energy Management System) 150. The facility 100 is, for example, a vehicle dealership. However, it is not limited thereto, and the facility 100 may also be other commercial facilities (department stores, roadside rest facilities, offices, factories, etc.), may be public facilities, or may be residences.

[0016] The distribution board 110 is electrically connected to the power system PG. Electric power (external power) is supplied from the power system PG to the distribution board 110. The power system PG is a power grid constructed by power transmission and distribution equipment. The power system PG may also include power conversion equipment. The power system PG may also be connected to power generation equipment. The power system PG corresponds to an example of the "external power source" in the present disclosure.

[0017] The manager of the facility 100 receives power supply from an energy service provider (ESP) such as an electric power company. Specifically, the power system PG supplies alternating current power to the facility 100 (distribution board 110). In the present embodiment, the maximum amount of electric power (hereinafter referred to as "contract upper limit value") supplied from the power system PG to the facility 100 is determined by a power contract. The contract upper limit value can be expressed by the amount of supplied electric power (kWh / h) per unit time (e.g., 30 minutes). When the amount of electric power supplied from the power system PG to the facility 100 exceeds the contract upper limit value, the manager of the facility 100 will be penalized (e.g., liquidated damages). The amount of electric power supplied from the power system PG to the facility 100 is successively measured by a watt-hour meter M1 (e.g., a smart meter). The watt-hour meter M1 successively sends the measured amount of electric power (supplied electric power X1) to the EMS 150 and the server 900 of the ESP, respectively.

[0018] The PCS 130 includes various circuits for power conditioning processing (e.g., power conversion and input / output adjustment). The PCS 130 converts the alternating current power received from the distribution board 110 into direct current power according to an instruction from the EMS 150, and outputs the direct current power to at least one of the energy storage devices 510 and 520. The energy storage device 510 is a stationary energy storage device. The energy storage device 520 is an energy storage device mounted on the vehicle 500. The energy storage devices 510 and 520 are charged by the power from the PCS 130, respectively. The PCS 130 performs power conversion for charging the energy storage devices 510 and 520. In addition, the energy storage devices 510 and 520 are each configured to be able to supply the power stored in the energy storage devices 510 and 520 to the facility 100. The PCS 130 performs power conversion between each of the energy storage devices 510 and 520 and the distribution board 110. Thereby, the power output from the energy storage devices 510 and 520 to the distribution board 110 becomes power that can be used in the power load 120 or each power supply device (power supply device 410, etc.). The PCS 130 is configured to perform power conversion for V2H (Vehicle to Home). The energy storage devices 510 and 520 each correspond to an example of the "second energy storage device" in the present disclosure.

[0019] The distribution board 110 distributes the external power input from the power system PG to a plurality of circuits (secondary circuits) within the facility 100. The secondary circuits can also be protected by fuses or circuit breakers. In the present embodiment, the distribution board 110 distributes the input external power to the power load 120, each power supply device (such as the power supply device 410), and the PCS 130. The power from the distribution board 110 can also be supplied to the power load 120 via a socket. The power load 120 can include, for example, lighting devices and air conditioning equipment. The EMS 150 can operate using the power from the distribution board 110 or can operate through another power source (such as a driving battery).

[0020] Each power supply device included in the charging system 1 functions as a vehicle power supply device (EVSE). The charging system 1 includes at least one of an AC power supply device that outputs AC power and a DC power supply device that outputs DC power. The vehicle 200 is equipped with a power storage device 210 and can charge the power storage device 210 using, for example, the power supply device 410. The vehicle 200 is configured to be able to travel using the power output from the power storage device 210. The vehicle 200 is equipped with an ECU (Electronic Control Unit). The vehicle 200 can be a pure electric vehicle (BEV) without an internal combustion engine or a PHEV (plug-in hybrid electric vehicle) with an internal combustion engine. The power storage device 210 is an example of the "first power storage device" in the present disclosure.

[0021] Each power supply device included in the charging system 1 is configured to be able to charge the power storage device 210 of the vehicle 200 in a state of being electrically connected to the vehicle 200 using the external power supplied to the facility 100. Each power supply device is configured to be able to be electrically connected to the vehicle 200 via, for example, a charging cable. In Figure 1 the example shown, the front end (connector) of the charging cable connected to the power supply device 410 is connected (inserted) into the inlet of the vehicle 200, and the vehicle 200 and the power supply device 410 are electrically connected. The connector of the charging cable is configured to be detachable with respect to the inlet of the vehicle 200. Each power supply device included in the charging system 1 is electrically connected to the distribution board 110, and the power output from the distribution board 110 is supplied to each power supply device. The power supply device 410 charges the power storage device 210 of the vehicle 200 using the external power supplied from the power system PG via the distribution board 110. The EMS 150 is configured to be able to communicate with each power supply device included in the charging system 1. Each power supply device is controlled by the EMS 150.

[0022] The mobile terminal 300 is carried by the user of the vehicle 200. The mobile terminal 300 is, for example, a smartphone equipped with a touch panel display. An application software for using the charging system 1 is installed on the mobile terminal 300. The mobile terminal 300 is configured to be able to communicate with the EMS 150 and the vehicle 200 (in-vehicle ECU) respectively.

[0023] The charging system 1 further includes coulometers M2 to M5. The coulometer M2 is located between the power load 120 and the distribution board 110, detects the amount of electric power consumed in the power load 120, and sequentially outputs the detected amount of electric power (required electric power Y1) to the EMS 150. The coulometer M3 is located between each power supply device included in the charging system 1 and the distribution board 110. The coulometer M3 detects the total amount of electric power consumed in each power supply device (the sum of the required electric powers of all the power supply devices included in the charging system 1), and sequentially outputs the detected amount of electric power (required electric power Y2) to the EMS 150. The coulometer M4 is located between the energy storage device 510 and the PCS 130. The coulometer M4 detects the amount of electric power (discharge amount) output from the energy storage device 510 to the facility 100 and the amount of electric power (charge amount) output from the facility 100 to the energy storage device 510. The coulometer M4 sequentially outputs the detected discharge amount X21 or charge amount Y31 of the energy storage device 510 to the EMS 150. The coulometer M5 is located between the energy storage device 520 and the PCS 130. The coulometer M5 detects the amount of electric power (discharge amount) output from the energy storage device 520 to the facility 100 and the amount of electric power (charge amount) output from the facility 100 to the energy storage device 520. The coulometer M5 sequentially outputs the detected discharge amount X22 or charge amount Y32 of the energy storage device 520 to the EMS 150.

[0024] The vehicle 200 detects the current state of charge (kWh) of the energy storage device 210, and in a state of being connected to any one of the power supply devices included in the charging system 1, sequentially outputs the detected state of charge D1 of the energy storage device 210 to the EMS 150 through the power supply device. The energy storage device 510 detects its current state of charge (kWh), and sequentially outputs the detected state of charge D21 of the energy storage device 510 to the EMS 150. The energy storage device 520 detects its current state of charge (kWh), and sequentially outputs the detected state of charge D22 of the energy storage device 520 to the EMS 150.

[0025] The EMS150 may also include a computer. The EMS150 includes, for example, a processor 151 and a storage device 152. The EMS150 stores the obtained supply power amount X1, discharge amounts X21, X22, required power amounts Y1, Y2, charge amounts Y31, Y32, and stored power amounts D1, D21, D22 in the storage device 152. The EMS150 controls the charging of each of the power storage devices 210, 510, 520 and controls the discharging of each of the power storage devices 510, 520. The storage device 152 uses the identification information of each power supply device to distinguish and store the location information and specification information (such as the rated output power indicating the power supply performance) of each power supply device included in the charging system 1. The storage device 152 prestores the specification information of the PCS130 and the power storage devices 510, 520, respectively. In the present embodiment, one or more processors execute the programs stored in one or more storage devices, thereby performing the control described below Figure 2 shown in the figure. However, these processes may be executed only by hardware (electronic circuits) without using software. The EMS150 is an example of the "control device" of the present disclosure.

[0026] Figure 2 is a flowchart showing the process of vehicle charging (charging of the power storage device 210 mounted on the vehicle 200) executed by the EMS150. "S" in the flowchart refers to a step. Figure 3 is a diagram exemplifying a screen for requesting a user to make a selection. Hereinafter, Figure 2 and Figure 3 are used to describe the control executed according to the vehicle charging request.

[0027] For example, when the vehicle 200 is electrically connected (inserted) to the power supply device 410, the vehicle 200 requests vehicle charging from the EMS150 through the power supply device 410. Also, the vehicle 200 may send the target stored power amount set by the user to the EMS150 through the mobile terminal 300. The power supply device 410 requests vehicle charging from the EMS150 by sending the identification information of the connected vehicle 200 and the power supply device 410 to the EMS150. When the EMS150 receives the vehicle charging request, it starts Figure 2 the processing flow shown in the figure. However, the start condition of this processing flow can be set arbitrarily.

[0028] Referring to Figure 2, in S11, the EMS 150 determines whether it is possible to limit the output of the power supply device 410 electrically connected to the vehicle 200. Specifically, the charging system 1 includes two types of power supply devices (the first power supply device and the second power supply device). The first power supply device is an output variable type power supply device configured to control the magnitude of the power supply power (the power output from the power supply device) within a predetermined range. The second power supply device is a power supply device that can control the execution / stop of power supply but cannot control the magnitude of the power supply power. The EMS 150 determines which type of power supply device the power supply device 410 conforms to based on the specification information (such as model or control specification) of the power supply device 410 stored in the storage device 152. If the power supply device 410 is the first power supply device, it is determined as "yes" in S11, and the process proceeds to S31. If the power supply device 410 is the second power supply device, it is determined as "no" in S11, and the process proceeds to S12. It should be noted that the EMS 150 can also make the determination in S11 based on information from the power supply device 410.

[0029] In S12, the EMS 150 predicts the power consumption in the facility 100 during the execution of vehicle charging. The power consumption in the facility 100 is equivalent to the sum of the required power amounts Y1 and Y2. The EMS 150 can also use meteorological information to predict the power consumption of the power load 120. It should be noted that vehicle charging starts in S23 or S26 described later.

[0030] In S13, the EMS 150 uses the predicted power consumption in S12 and the upper limit value of the supplied power amount X1 (such as the contract upper limit value) to calculate the peak shaving and valley filling discharge amount required for vehicle charging. The peak shaving and valley filling discharge amount is equivalent to the sum of the discharge amounts X21 and X22. The peak shaving and valley filling discharge is a discharge used to suppress the peak of the supply amount of external power to the facility 100 from becoming larger than the upper limit value, and is executed by at least one of the energy storage devices 510 and 520. The EMS 150 can also determine the energy storage device (at least one of the energy storage devices 510 and 520) for executing the peak shaving and valley filling discharge based on the calculated peak shaving and valley filling discharge amount and the current stored power amounts D21 and D22. It should be noted that the peak shaving and valley filling discharge starts in S23 described later.

[0031] In S14, the EMS 150 determines whether charging for peak shaving and valley filling is required. Charging for peak shaving and valley filling is the charging of the energy storage device that performs peak shaving and valley filling discharge, and it starts in S21 described later. The EMS 150 can also use the peak shaving and valley filling discharge amount calculated in S13 and the current stored energy amounts D21 and D22 to make the determination in S14. When the current stored energy amounts D21 and D22 can perform peak shaving and valley filling discharge, it is determined as no in S14, and the process proceeds to S23. On the other hand, when charging for peak shaving and valley filling is required (yes in S14), the EMS 150 determines the conditions for charging for peak shaving and valley filling in S15 to S17 shown below.

[0032] In S15, the EMS 150 uses the current stored energy amounts D21 and D22 to determine the charging amount (kWh) for peak shaving and valley filling. The charging amount for peak shaving and valley filling corresponds to at least one of the charging amounts Y31 and Y32. In S16, the EMS 150 determines the charging power (kW) for peak shaving and valley filling. The EMS 150 uses the power consumption predicted in S12 and the specification information of the power supply device 410 to determine the charging power for peak shaving and valley filling. The EMS 150 determines the charging power for peak shaving and valley filling in such a way as to avoid the supplied power amount X1 exceeding a predetermined value (for example, the contract upper limit value). In S17, the EMS 150 calculates the charging time for peak shaving and valley filling using the determined charging amount and charging power for peak shaving and valley filling. In the present embodiment, the completion condition of charging for peak shaving and valley filling is determined based on the charging time calculated in S17. Charging for peak shaving and valley filling is completed at the timing when the above charging time has elapsed after the start.

[0033] In the subsequent S18, the EMS 150 notifies the user of the vehicle 200 of the scheduled start time and scheduled end time of vehicle charging, and urges the selection of whether to allow restrictions on vehicle charging. More specifically, the EMS 150 uses the charging time calculated in S17 to predict the start time of vehicle charging. For example, it is predicted that vehicle charging starts at the timing when charging for peak shaving and valley filling is completed. And the EMS 150 uses the scheduled start time of vehicle charging, the specification information of the power supply device 410, and the target stored energy amount of vehicle charging to predict the end time of vehicle charging. And the EMS 150 notifies the predicted times (the scheduled start time and scheduled end time of vehicle charging) to the mobile terminal 300, and requests the mobile terminal 300 to reply whether it agrees to start vehicle charging at the notified scheduled start time.

[0034] When the mobile terminal 300 receives the above reply request from the EMS 150, it displays, for example Figure 3The screen Sc1 shown. The screen Sc1 displays the vehicle charging schedule P11, a message P12 prompting the user to perform an operation, and operation units P13, P14. The schedule P11 shows the scheduled start time and the scheduled end time of vehicle charging, and the time waiting for the completion of charging for peak shaving and valley filling (the time from the current time to the scheduled start time of vehicle charging). The operation units P13, P14 respectively receive input of consent or rejection from the user regarding the vehicle charging shown in the schedule P11.

[0035] In the subsequent S19, the EMS150 determines whether the user of the vehicle 200 agrees to the vehicle charging schedule presented in S18. For example, the EMS150 determines which of the operation units P13, P14 the user has operated for the screen Sc1 ( Figure 3 ). When the operation unit P13 is operated, the mobile terminal 300 sends a reply of consent to the EMS150. In this case, it is determined as yes in S19, and the process proceeds to S21. On the other hand, when the operation unit P14 is operated, the mobile terminal 300 sends a reply of rejection to the EMS150. In this case, it is determined as no in S19, and the process proceeds to S24.

[0036] In S21, in order to perform peak shaving and valley filling charging on at least one of the power storage devices 510 and 520 under the charging conditions determined in S15 to S17, the EMS150 controls the PCS130. In the subsequent S22, the EMS150 determines whether the peak shaving and valley filling charging has been completed. Specifically, after the start of the peak shaving and valley filling charging, the charging completion condition does not hold during the period when the charging time determined in S17 has not elapsed, and the charging completion condition holds when the charging time has elapsed. During the period when the charging completion condition does not hold (no in S22), S21 and S22 are repeated, and the peak shaving and valley filling charging continues. When the charging completion condition holds (yes in S22), the process proceeds to S23, and the peak shaving and valley filling charging stops.

[0037] In S23, the EMS 150 starts vehicle charging (required charging) while performing peak shaving and valley filling discharge. The peak shaving and valley filling discharge is performed by at least one of the power storage devices 510 and 520. The EMS 150 controls the PCS 130 in such a way as to perform peak shaving and valley filling discharge. The vehicle charging (charging of the power storage device 210) is performed in a state where both the power based on the peak shaving and valley filling discharge and the external power from the power system PG are supplied to the facility 100. It is also possible to supply power corresponding to the rated output of the power supply device 410 from the power supply device 410 to the vehicle 200. The rated output power of the power supply device 410 is larger than the charging power for peak shaving and valley filling determined in S16. The EMS 150 supplies power from at least one of the power storage devices 510 and 520 to the facility 100 and performs vehicle charging in such a way as to avoid the supply amount (supply power amount X1) of the external power to the facility 100 from exceeding a predetermined value (for example, the contract upper limit value). And when the stored power amount D1 of the power storage device 210 reaches the target stored power amount, the EMS 150 ends the vehicle charging. And this processing flow ends. The target stored power amount can be either a value obtained from the vehicle 200 or a preset fixed value (for example, a value indicating full charge).

[0038] In S24, the EMS 150 notifies the user of the vehicle 200 of an additional fee associated with the immediate start of vehicle charging and urges the user to select whether to agree to pay the additional fee. More specifically, the EMS 150 uses the current time, the specification information of the power supply device 410, and the target stored power amount of the vehicle charging to predict the end time of the vehicle charging in the case where the vehicle charging has started immediately. And the EMS 150 notifies the predicted end time (predetermined end time) and the above-mentioned additional fee to the mobile terminal 300. The additional fee can be either a fixed amount or the amount increases as the waiting time (charging time calculated in S17) becomes longer. When receiving the above notification from the EMS 150, the mobile terminal 300 displays, for example Figure 3 the screen Sc2 shown. The screen Sc2 displays the predetermined end time P21 of the vehicle charging, the additional fee P22, a message P23 urging the user to perform an operation, and operation units P24, P25. The operation units P24, P25 receive inputs of consent and rejection from the user regarding the displayed additional fee P22 respectively.

[0039] In the subsequent S25, the EMS 150 determines whether the user of the vehicle 200 agrees to pay the above-mentioned additional fee. For example, with respect to the screen Sc2 ( Figure 3 ), when the operation unit P24 is operated, the mobile terminal 300 makes a reply of consent. Thus, in S25, it is determined to be yes, and the process proceeds to S26. On the other hand, when the operation unit P25 is operated, the mobile terminal 300 makes a reply of rejection. Thus, in S25, it is determined to be no, and the process returns to S18.

[0040] In S26, the EMS 150 starts vehicle charging (required charging). In S26, peak shaving and valley filling discharging is not performed. In S26, normal vehicle charging control is executed. The EMS 150 may also delegate the charging control of the power storage device 210 to the vehicle 200 (in-vehicle ECU). It is also possible to supply power corresponding to the rated output of the power supply device 410 from the power supply device 410 to the vehicle 200. When the stored electricity amount D1 of the power storage device 210 reaches the target stored electricity amount, the EMS 150 ends the vehicle charging. And, the EMS 150 requests the user for the additional charge prompted in S24. Thereby, this processing flow ends.

[0041] In S31, the EMS 150 predicts the end time of vehicle charging (refer to S34 described later) accompanied by output variable control of the power supply device 410 (output variable type power supply device). Specifically, similar to S12, the EMS 150 predicts the power consumption amount consumed in the facility 100 during the execution of vehicle charging. Next, the EMS 150 predicts the power supply during the vehicle charging period based on the predicted power consumption amount. There is a tendency that the more the power consumption amount is, the smaller the power supply is. Next, the EMS 150 uses the current time, the predicted power supply, and the target stored electricity amount of the vehicle charging to predict the end time of the vehicle charging.

[0042] In the subsequent S32, the EMS 150 notifies the user of the vehicle 200 of the end time (scheduled end time) of the vehicle charging predicted in S31, and urges the selection of whether to agree to the vehicle charging with the prompted scheduled end time. More specifically, the EMS 150 notifies the mobile terminal 300 of the scheduled end time of the vehicle charging. When the mobile terminal 300 receives this notification, it displays, for example Figure 3 the screen Sc3 shown. The screen Sc3 displays the scheduled end time P31 of the vehicle charging, the message P32 urging the user to operate, and the operation units P33, P34. The operation units P33, P34 respectively accept the input of consent and rejection from the user regarding the displayed scheduled end time P31.

[0043] In the subsequent S33, the EMS 150 determines whether the user agrees to the scheduled end time prompted in S32. For example, with respect to the screen Sc3 ( Figure 3 ), when the operation unit P33 is operated, the mobile terminal 300 makes a consent reply. Thereby, in S33, it is determined to be yes, and the process proceeds to S34. On the other hand, when the operation unit P34 is operated, the mobile terminal 300 makes a rejection reply. Thereby, in S33, it is determined to be no, and the process returns to S12.

[0044] In S34, the EMS 150 starts vehicle charging (required charging) based on variable control of the output of the power supply device 410. In S34, peak shaving and valley filling discharge is not performed. The EMS 150 confirms the supply amount of external power (supply power amount X1) to the facility 100 in S34 and controls the output of the power supply device 410 (and thus the required power amount Y2) in such a way as to avoid the supply power amount X1 exceeding a predetermined value (for example, the contract upper limit value). The power storage device 210 is charged with the power output from the power supply device 410, and when the stored power amount D1 of the power storage device 210 reaches the target stored power amount, the EMS 150 ends the vehicle charging. And this processing flow ends.

[0045] As described above, in the charging system 1 of the present embodiment, when the vehicle 200 requests charging of the power storage device 210 mounted on the vehicle 200, the EMS 150 (control device) urges the user of the vehicle 200 to select whether to allow restriction of the requested charging ( Figure 2 S18). And after obtaining the permission of the user, the requested charging is prohibited until the peak shaving and valley filling charging ends ( Figure 2 S21, S22). By prohibiting the charging of the power storage device 210, external power is no longer used for charging the power storage device 210, so the peak value of the supply amount of external power to the facility 100 is suppressed from becoming too large. And in the charging system 1, the charging of the power storage device 210 is restricted (for example, prohibited) based on the user's selection. According to such a structure, the convenience of the user is prevented from being excessively impaired due to the restriction of charging.

[0046] In the present embodiment, when the user selects to allow restriction of charging, the EMS 150 performs peak shaving and valley filling charging (charging of at least one of the power storage devices 510 and 520) in a state where the requested vehicle charging is restricted ( Figure 2 S21). Moreover, the EMS 150 releases the charging restriction when the peak shaving and valley filling charging is completed. According to such a structure, during the period of restricting the requested charging, the power amount for peak shaving and valley filling discharge can be stored. Thus, even if the supply amount of external power to the facility 100 is not excessively increased, the necessary power amount can be supplied by peak shaving and valley filling discharge.

[0047] In the present embodiment, the EMS 150 does not perform the requested charging during the peak shaving and valley filling charging. And when the peak shaving and valley filling charging is completed, the EMS 150 stops the peak shaving and valley filling charging and starts charging the power storage device 210, supplies power from at least one of the power storage devices 510 and 520 to the facility 100 in such a way as to avoid the supply amount of external power to the facility 100 exceeding a predetermined value and performs charging of the power storage device 210 (Figure 2 According to such a configuration, by supplying power from at least one of the power storage devices 510 and 520 to the facility 100, at least a portion of the power required for charging the power storage device 210 can be supplied. Therefore, the amount of external power supplied to the facility 100 can be suppressed from exceeding a predetermined value.

[0048] In the present embodiment, the EMS 150 determines a charging completion condition (charging completion condition) for peak load shifting using a predicted value of the amount of power consumed in the facility 100 during the execution of the requested vehicle charging. Figure 2 Therefore, it is easy to determine the charging completion condition in a manner that a sufficient amount of power is stored for peak-shaving and valley-filling discharge. Figure 2 In the process of S18, the user is notified of the scheduled start time of vehicle charging when charging is restricted. Therefore, the user can consider the delay in starting charging associated with the restriction of charging and determine whether to allow the restriction of vehicle charging for the purpose of reward.

[0049] In the above embodiment, the EMS 150 imposes a penalty (for example, an additional fee) on the user who selects the restriction of rejecting charging. Figure 2 S26). Thus, a user who has selected the restriction to allow charging is relatively rewarded. However, this is not limited to this, and EMS150 may also pay a reward to a user who has selected the restriction to allow charging. The reward may be paid in the form of a discount on the charging fee. The charging method for the charging fee may be either connection time charging or volume-based charging. Furthermore, EMS150 may also reward a user who has agreed to the scheduled end time in S33.

[0050] It should be noted that during the period of restricting the required charging, the amount of power consumed in the facility 100 may decrease. The EMS 150 may also remove the restriction on charging at a timing when the restriction on charging is not required. Furthermore, the restriction on charging is not limited to prohibition of charging. The state of restricted charging includes a state in which the charging power is lower than that of normal charging (charging without restriction). The EMS 150 may also replace Figure 2 The processing flow shown is executed Figure 4 The processing flow shown. Figure 4 It is shown Figure 2 FIG. 1 is a diagram of a first variation of the processing flow shown.

[0051] Reference Figure 4 If the power supply device 410 is the second power supply device (No in S11), the process proceeds to S12. The processes after S12 are the same as Figure 2The processing after S12 shown is the same. When the power supply device 410 is the first power supply device (Yes in S11), the same processing as S12 to S14 of Figure 2 is executed in S12A to S14A respectively. And, when it is determined that charging for peak shaving and valley filling is required (Yes in S14A), the EMS 150 determines the charging power (limit value) of the vehicle charging with the following restrictions (S21A) in S14B. The EMS 150 may also make the limit value smaller as the predicted power consumption amount in S12A is larger. Also, the limit value may be a fixed value (for example, about 1 kW). In the subsequent S15A to S19A, the processing according to Figure 2 of S15 to S19 is executed respectively. However, in S16A, the EMS 150 may also use the charging power (limit value) determined in S14B in addition to the predicted power consumption amount in S12A and the specification information of the power supply device 410 to determine the charging power for peak shaving and valley filling. When the user rejects the charging schedule prompted in S18A (No in S19A), the processing proceeds to S24A. The processing of S24A and the subsequent S25A and S26A respectively follow Figure 2 the processing of S24, S25, and S26. On the other hand, when the user agrees to the charging schedule prompted in S18A (Yes in S19A), the EMS 150 executes vehicle charging in a state where the output of the power supply device 410 is restricted and also executes charging for peak shaving and valley filling in S21A. The vehicle charging is executed with the charging power (limit value) determined in S14B. The limit value is smaller than the charging power of normal vehicle charging (S26A). The EMS 150 adjusts the vehicle charging power by controlling the output of the power supply device 410. The output of the power supply device 410 is restricted by the supply power corresponding to the limit value. In the subsequent S22A, the EMS 150 determines whether the charging for peak shaving and valley filling has been completed. And, when the charging completion condition is satisfied (Yes in S22A), the processing proceeds to S23A, and the charging for peak shaving and valley filling stops. Thereby, the output restriction of the power supply device 410 is released. In S23A, the EMS 150 executes vehicle charging while discharging for peak shaving and valley filling. The processing of S22A and S23A respectively follow Figure 2 the processing of S22 and S23.

[0052] In Figure 4In the above-described modification, when it is determined that the output of the power supply device 410 can be restricted and the user selects to allow charging with restriction (Yes in S11 and Yes in S19A), the EMS 150 performs vehicle charging (required charging) in a state where the output of the power supply device 410 is restricted during the charging for peak shaving and valley filling (S21A). And, when the charging for peak shaving and valley filling is completed (Yes in S22A), the EMS 150 stops the charging for peak shaving and valley filling and releases the output restriction of the power supply device 410, and supplies power from at least one of the power storage devices 510 and 520 to the facility 100 and performs vehicle charging in such a way that the supply amount of external power to the facility 100 does not exceed a predetermined value (S23A). In such a configuration, it is possible to perform vehicle charging with a charging power smaller than normal using the first power supply device (a power supply device with variable output). And, during the period of performing vehicle charging in a state where the output of the power supply device 410 (and thus the charging power) is restricted, it is possible to store the amount of power for peak shaving and valley filling discharge. Since the restricted charging power is small, an increase in external power is suppressed. And, deterioration of the power storage device 210 is also suppressed. And, by performing vehicle charging while performing peak shaving and valley filling discharge, it is possible to suppress the supply amount of external power to the facility 100 from exceeding a predetermined value while the vehicle is being charged.

[0053] Figure 2 , Figure 4 The processing flows respectively shown in ,

[0053] , Figure 2 , and Figure 4 can be appropriately changed. For example, according to the purpose, the order of the processing can be changed, and unnecessary steps can be omitted. And, the content of any processing can also be changed, and steps can be added.

[0054] Figure 5 is a diagram showing Figure 2 a second modification of the processing flow shown in ,

[0053] , Figure 2 , and Figure 4 . Figure 5 The processing flow shown in Figure 2 is basically the same as Figure 2The processing flow shown is the same, but steps (S51 and S52) executed during the charging for peak shaving and valley filling are added. In S51, EMS150 prompts the user of vehicle 200 with an additional fee associated with the immediate start of vehicle charging, and urges the selection of whether to agree to pay the additional fee. EMS150 causes, for example, screen Sc4 to be displayed on mobile terminal 300. Screen Sc4 displays additional fee P41, a message P42 urging the user to perform an operation, and operation section P43. Operation section P43 accepts an input of consent from the user regarding the displayed additional fee P41. In the subsequent S52, EMS150 determines whether the user agrees to the prompted additional fee. When operation section P43 is operated, mobile terminal 300 sends a reply of consent. Thus, if it is determined to be yes in S52, the process proceeds to S26. On the other hand, when EMS150 does not receive a reply of consent from mobile terminal 300, EMS150 determines it to be no in S52 and returns the process to S21. Thus, the charging for peak shaving and valley filling continues.

[0055] Figure 6 is a diagram showing Figure 2 a third modification example of the processing flow shown. Figure 6 The processing flow shown is the same as that of Figure 2 except that S11, S31 to S34 are omitted.

[0056] Power system PG is not limited to a large-scale AC power grid, and can also be a microgrid or a DC (direct current) power grid. The charging method is not limited to contact charging (plug-in charging), and can also be non-contact charging. A vehicle performing non-contact charging can be regarded as being electrically connected between the power supply device and the vehicle when the alignment between the power transmission section on the power supply device side and the power reception section on the vehicle side is completed. The power conversion circuit for charging and discharging the in-vehicle battery can also be mounted on the power supply device instead of on the vehicle. The vehicle is not limited to a four-wheeled sedan, and can also be a bus or a truck, and the number of wheels is also arbitrary. In the above-described embodiment, mobile terminal 300 (smartphone) functions as the terminal (user terminal) of the user of vehicle 200. However, it is not limited thereto, and an in-vehicle HMI (Human Machine Interface), a tablet terminal, or a wearable device can be used as the user terminal instead of the smartphone.

[0057] The number of peak shaving and valley filling energy storage devices can be appropriately changed. It is also possible to use only one energy storage device (for example, only energy storage device 510) as the peak shaving and valley filling energy storage device. It is also possible to install the function of EMS150 on the cloud through cloud computing.

[0058] The above-described various modification examples can also be implemented in any combination.

[0059] The embodiments disclosed herein should be considered illustrative in all respects and not restrictive. The scope of the present disclosure is represented by the claims, rather than the description of the above embodiments, and is intended to cover all modifications within the meaning and scope equivalent to the claims.

Claims

1. A charging system configured to charge a first power storage device and a second power storage device using external power supplied from an external power supply to a facility, The first power storage device is mounted on a vehicle, The second power storage device is configured to supply the electric power stored in the second power storage device to the facility. The charging system includes a control device that controls charging of each of the first power storage device and the second power storage device. The control device is configured as follows: prompting a user of the vehicle who has requested charging of the first power storage device to select whether to allow restriction of the requested charging, If the user selects a restriction on charging permission, the requested charging is restricted.

2. The charging system according to claim 1, wherein: The control device is configured to, when the user selects a restriction to permit the charging, execute charging of the second power storage device with the requested charging restricted, and to release the restriction on charging when charging of the second power storage device is completed.

3. The charging system according to claim 2, wherein: The control device is configured to not perform the required charging during charging of the second power storage device, stop charging of the second power storage device and start the required charging when charging of the second power storage device is completed, and supply power from the second power storage device to the facility and perform the required charging in a manner that avoids the supply amount of the external power to the facility exceeding a predetermined value.

4. The charging system according to claim 3, wherein: The control device is configured to be able to communicate with the user's terminal, The control device is configured as follows: predicting an amount of power consumption consumed in the facility during execution of the requested charging, determining a condition for completing charging of the second power storage device using the predicted power consumption, using the determined condition to predict the requested charging start time, notifying the user's terminal of the predicted start time, The user is urged to select whether to allow restriction of the requested charging by requesting the user terminal to reply whether the user agrees to start charging of the first power storage device at the notified start time, A reward is given to the user who selects a restriction that allows the charging.

5. The charging system according to claim 2, wherein: The charging system further includes a power supply device, The power supply facility is configured to charge the first power storage device of the vehicle in a state electrically connected to the power supply facility using the external power supplied to the facility. The control device is configured as follows: When charging of the first power storage device is requested while the vehicle is electrically connected to the power supply facility, determining whether the output of the power supply facility can be limited; In the case where it is determined that the output of the power supply device can be restricted and the user has selected to allow the restricted charging, the control device charges the first power storage device in a state where the output of the power supply device is restricted during the charging of the second power storage device, stops the charging of the second power storage device when the charging of the second power storage device is completed, and releases the output restriction of the power supply device, and supplies power from the second power storage device to the facility and charges the first power storage device in such a way that the supply amount of the external power to the facility does not exceed a predetermined value.

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