Charge and discharge system, and control method for charge and discharge system

Abstract

To provide a charging / discharging system capable of easily understanding the exchange of power, and a method for controlling a charging / discharging system.SOLUTION: Provided is a charging / discharging system which, in a predetermined supply area where power is supplied from a power system, performs charging / discharging between a vehicle power storage device of a power storage device included in a vehicle and the charging / discharging system and supplies power to power loads in the supply area. The charging / discharging system includes: an acquisition unit 161 that acquires, for a plurality of predetermined periods, a charge-side electric energy information indicating the magnitude of electric energy including charged electric energy from the charging / discharging system to the vehicle power storage device and discharge-side electric energy information indicating the magnitude of electric energy including discharged electric energy from the vehicle power storage device to the charging / discharging system; a generation unit 162 that generates display data for displaying, on a display device, a calendar screen in which the charge-side electric energy information and the discharge-side electric energy information are displayed for each predetermined period in a calendar having the plurality of predetermined periods arranged; and a transmission unit 163 that transmits the display data to the display device.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a charge-discharge system that performs charge and discharge with a vehicle power storage device, which is a power storage device of a vehicle, and a control method for the charge-discharge system.

Background Art

[0002] Patent Document 1 discloses a system-connected system (charge-discharge system) that is supplied with power from a power system, performs charge and discharge with a battery (vehicle power storage device) mounted on an electric vehicle, and supplies power to a power load.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional charge-discharge system as disclosed in Patent Document 1 above, since power is exchanged among the power system, the vehicle power storage device, and the power load, it may be difficult to grasp such power exchange. Therefore, it is desired that the power exchange in the charge-discharge system can be easily grasped.

[0005] An object of the present invention is to provide a charge-discharge system capable of easily grasping power exchange and a control method for the charge-discharge system.

Means for Solving the Problems

[0006] A charge-discharge system according to one aspect of the present invention performs charge and discharge with a vehicle power storage device, which is a power storage device of a vehicle, in a predetermined supply area where power is supplied from a power grid, and supplies power to a power load in the supply area. The charge-discharge system includes: an acquisition unit that acquires charge-side power amount information indicating the magnitude of the amount of power including the amount of charging power from the charge-discharge system to the vehicle power storage device and discharge-side power amount information indicating the magnitude of the amount of power including the amount of discharging power from the vehicle power storage device to the charge-discharge system in a plurality of predetermined periods; a generation unit that generates display data for causing a display device to display a calendar screen on which the charge-side power amount information and the discharge-side power amount information are displayed for each of the predetermined periods in a calendar in which the plurality of predetermined periods are arranged; and a transmission unit that transmits the display data to the display device.

[0007] The present invention can be realized not only as such a charge-discharge system but also as a control method for the charge-discharge system. The present invention can also be realized as a program for causing a computer to execute processes included in the control method of the charge-discharge system, and can also be realized as a computer-readable recording medium such as a CD-ROM on which the program is recorded. The program can be distributed via the recording medium and a transmission medium such as the Internet. The present invention can also be realized as an integrated circuit including a processing unit included in the charge-discharge system.

Advantages of the Invention

[0008] According to the charge-discharge system and the like in the present invention, the power exchange can be easily grasped.

Brief Description of the Drawings

[0009]

Figure 1

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Figure 11

Mode for Carrying Out the Invention

[0010] The charge / discharge system according to one aspect of the present invention performs charge / discharge with a vehicle power storage device, which is a power storage device of a vehicle, in a predetermined supply area where power is supplied from a power grid, and supplies power to a power load in the supply area. The charge / discharge system includes an acquisition unit that acquires charge-side power amount information indicating the magnitude of the amount of power including the amount of charging power from the charge / discharge system to the vehicle power storage device and discharge-side power amount information indicating the magnitude of the amount of power including the amount of discharging power from the vehicle power storage device to the charge / discharge system in a plurality of predetermined periods, a generation unit that generates display data for causing a display device to display a calendar screen on which the charge-side power amount information and the discharge-side power amount information are displayed for each of the predetermined periods in a calendar in which the plurality of predetermined periods are arranged, and a transmission unit that transmits the display data to the display device.

[0011] According to this, the charge and discharge system generates display data for causing a display device to display a calendar screen on which charge-side power amount information and discharge-side power amount information are displayed for each predetermined period in a calendar in which a plurality of predetermined periods are arranged in series, and transmits the display data to the display device. That is, the charge and discharge system transmits display data of a calendar screen on which information indicating the magnitude of the power amount including the charge and discharge power amount between the charge and discharge system and the vehicle power storage device is displayed for each predetermined period of the calendar to the display device. If the information indicating the magnitude of the power amount can be displayed for each predetermined period of the calendar, it is easy to intuitively grasp the situation of the power amount. Therefore, since the exchange of power (power amount) between the charge and discharge system and the vehicle power storage device or the like in the charge and discharge system can be calendar-displayed on the screen of the display device, the exchange of power in the charge and discharge system can be easily grasped.

[0012] The generation unit may generate the display data for causing the display device to display the calendar screen on which a charge-side power amount figure, which is a figure indicating the magnitude of the power amount indicated by the charge-side power amount information, is displayed as the charge-side power amount information and a discharge-side power amount figure, which is a figure indicating the magnitude of the power amount indicated by the discharge-side power amount information, is displayed as the discharge-side power amount information.

[0013] According to this, the charge and discharge system generates display data for causing a display device to display a calendar screen on which a charge-side power amount figure and a discharge-side power amount figure are displayed. That is, the charge and discharge system generates display data for causing a display device to display a calendar screen on which a figure indicating the magnitude of the power amount including the charge and discharge power amount between the charge and discharge system and the vehicle power storage device is displayed. If the figure indicating the magnitude of the power amount can be displayed for each predetermined period of the calendar, it is easy to intuitively grasp the situation of the power amount. Therefore, since the exchange of power (power amount) between the charge and discharge system and the vehicle power storage device or the like in the charge and discharge system can be calendar-displayed in a figure on the screen of the display device, the exchange of power in the charge and discharge system can be easily grasped.

[0014] The generation unit may generate the display data for causing the display device to display the calendar screen in which, as the charging-side power amount information, a numerical value indicating the magnitude of the power amount indicated by the charging-side power amount information is further displayed at a position corresponding to the charging-side power amount figure, and as the discharging-side power amount information, a numerical value indicating the magnitude of the power amount indicated by the discharging-side power amount information is further displayed at a position corresponding to the discharging-side power amount figure.

[0015] According to this, the charge / discharge system generates display data for causing the display device to display a calendar screen in which numerical values indicating the magnitudes of the charging-side power amount information and the discharging-side power amount information are further displayed at positions corresponding to the charging-side power amount figure and the discharging-side power amount figure. That is, the charge / discharge system generates display data for a calendar screen in which a numerical value indicating the magnitude of the power amount is further displayed at a position corresponding to a figure indicating the magnitude of the charge / discharge power amount including the charge / discharge power amount with the vehicle power storage device. If the numerical value of the power amount is displayed at a position corresponding to the figure of the power amount, it is easy to intuitively grasp the situation of the power amount. Therefore, since the exchange of power (power amount) between the vehicle power storage device and the like in the charge / discharge system can be displayed in a calendar form with figures and numerical values on the screen of the display device, the exchange of power in the charge / discharge system can be easily grasped.

[0016] The generation unit may generate the display data for causing the display device to display the calendar screen in which the charging-side power amount information and the discharging-side power amount information are displayed in the same positional relationship for each of the predetermined periods.

[0017] According to this, the charge and discharge system generates display data for causing a display device to display a calendar screen in which information on the amount of power including the amount of charge power between the vehicle power storage device and information on the amount of power including the amount of discharge power are displayed in the same positional relationship at regular intervals. If the information on the amount of power including the amount of charge power (charge-side power amount information) and the information on the amount of power including the amount of discharge power (discharge-side power amount information) are displayed in the same positional relationship at regular intervals, it is easy to intuitively grasp the situation of the amount of power (which one is excessive, whether the balance is maintained, etc.). Therefore, since the exchange of power (amount of power) between the vehicle power storage device and the like in the charge and discharge system can be calendar-displayed on the screen of the display device in the same positional relationship, the exchange of power in the charge and discharge system can be easily grasped.

[0018] At least one of a power generation device and a power storage device is connected to the charge and discharge system. The acquisition unit acquires, as the charge-side power amount information, vehicle charge power amount information indicating the magnitude of the charge power amount of the vehicle power storage device and first power amount information indicating the magnitude of at least one of the charge power amount of the power storage device and the power consumption amount of the power load. As the discharge-side power amount information, the acquisition unit acquires vehicle discharge power amount information indicating the magnitude of the discharge power amount of the vehicle power storage device and second power amount information indicating the magnitude of at least one of the power generation amount of the power generation device and the discharge power amount of the power storage device. The generation unit may generate the display data for causing the display device to display the calendar screen in which the vehicle charge power amount information and the first power amount information are displayed as the charge-side power amount information and the vehicle discharge power amount information and the second power amount information are displayed as the discharge-side power amount information.

[0019] According to this, the charge-discharge system generates display data of a calendar screen in which vehicle charge power amount information and first power amount information are displayed as charge-side power amount information, and vehicle discharge power amount information and second power amount information are displayed as discharge-side power amount information. That is, when at least one of a power generation device and a power storage device is connected to the charge-discharge system, information indicating the magnitude of the charge power amount of the vehicle power storage device and information indicating the magnitude of at least one of the charge power amount of the power storage device and the power consumption amount of the power load are used as the charge-side power amount information. Information indicating the magnitude of the discharge power amount of the vehicle power storage device and information indicating the magnitude of at least one of the power generation amount of the power generation device and the discharge power amount of the power storage device are used as the discharge-side power amount information. Thereby, even when at least one of the power generation device and the power storage device is connected to the charge-discharge system, the power (power amount) exchange between the charge-discharge system and at least one of the power generation device and the power storage device can be calendar-displayed on the screen of the display device. Therefore, the power exchange in the charge-discharge system can be easily grasped.

[0020] The generation unit may generate the display data for causing the display device to display the calendar screen in which the first power amount information is displayed closer to the vehicle charge power amount information than the vehicle discharge power amount information, and the second power amount information is displayed closer to the vehicle discharge power amount information than the vehicle charge power amount information.

[0021] According to this, the charge-discharge system generates display data for causing the display device to display a calendar screen in which the first power amount information is displayed close to the vehicle charge power amount information and the second power amount information is displayed close to the vehicle discharge power amount information. If the vehicle charge power amount information and the first power amount information as the charge-side power amount information are displayed close to each other, and the vehicle discharge power amount information and the second power amount information as the discharge-side power amount information are displayed close to each other, it is easy to intuitively grasp the power amount situation. Therefore, since the power (power amount) exchange in the charge-discharge system can be calendar-displayed on the screen of the display device for each charge-side power amount information and each discharge-side power amount information, the power exchange in the charge-discharge system can be easily grasped.

[0022] The generation unit may generate the display data for causing the display device to display the calendar screen in which a figure indicating the magnitude of the power amount indicated by the vehicle charging power amount information and a figure indicating the magnitude of the power amount indicated by the first power amount information are arranged side by side as the charging-side power amount information, and in which a figure indicating the magnitude of the power amount indicated by the vehicle discharging power amount information and a figure indicating the magnitude of the power amount indicated by the second power amount information are arranged side by side as the discharging-side power amount information.

[0023] According to this, the charge-discharge system generates display data of a calendar screen in which figures indicating the magnitudes of the power amounts of the vehicle charging power amount information and the first power amount information are arranged side by side, and figures indicating the magnitudes of the power amounts of the vehicle discharging power amount information and the second power amount information are arranged side by side. That is, as the figure indicating the magnitude of the power amount of the charging-side power amount information, a figure indicating the magnitude of the charging power amount of the vehicle power storage device and a figure indicating the magnitude of at least one of the charging power amount of the power storage device and the power consumption amount of the power load are arranged side by side. As the figure indicating the magnitude of the power amount of the discharging-side power amount information, a figure indicating the magnitude of the discharging power amount of the vehicle power storage device and a figure indicating the magnitude of at least one of the power generation amount of the power generation device and the discharging power amount of the power storage device are arranged side by side. Thereby, it is easy to intuitively grasp and compare (such as which is excessive or whether the balance is achieved) the magnitude of the power amount of the charging-side power amount information and the magnitude of the power amount of the discharging-side power amount information. Therefore, since the power (power amount) exchange in the charge-discharge system can be clearly displayed on the screen of the display device in a calendar display with the magnitudes of the power amounts of the charging-side power amount information and the discharging-side power amount information being easy to understand, the power exchange in the charge-discharge system can be easily grasped.

[0024] The generation unit generates the display data for causing the display device to display the calendar screen on which charging-side power amount display information for displaying the charging-side power amount information and discharging-side power amount display information for displaying the discharging-side power amount information are further displayed. The acquisition unit is configured to be able to acquire information indicating that at least one of the charging-side power amount display information and the discharging-side power amount display information displayed on the display device is selected. When the acquisition unit does not acquire information indicating that the charging-side power amount display information is selected, the generation unit generates the display data for causing the display device to display the calendar screen on which the charging-side power amount information is not displayed. When the acquisition unit does not acquire information indicating that the discharging-side power amount display information is selected, the generation unit may generate the display data for causing the display device to display the calendar screen on which the discharging-side power amount information is not displayed.

[0025] According to this, when the charging and discharging system does not acquire information indicating that the charging-side power amount display information or the discharging-side power amount display information is selected, the charging and discharging system generates display data of a calendar screen on which the charging-side power amount information or the discharging-side power amount information is not displayed. Thereby, since the unselected information among the charging-side power amount information and the discharging-side power amount information is not displayed on the calendar screen, the desired information can be selectively displayed, and it is easy to intuitively grasp the power amount situation. Therefore, since the power (power amount) transaction in the charging and discharging system can be calendar-displayed on the screen of the display device by narrowing down the target to be viewed, the power transaction in the charging and discharging system can be easily grasped.

[0026] Hereinafter, with reference to the drawings, a charge-discharge system according to an embodiment (including its modifications) of the present invention, a control method of the charge-discharge system, and the like will be described. The embodiments described below are all illustrative or specific examples. The numerical values, components, arrangement positions and connection forms of the components, control processes, order of control processes, etc. shown in the following embodiments are merely examples and are not intended to limit the present invention. Each drawing is a schematic diagram and is not necessarily strictly illustrated. In each drawing, the same or similar components are denoted by the same reference numerals.

[0027] (Embodiment) [1 Description of Charge-Discharge System 10] First, a general description of the charge-discharge system 10 will be given. FIG. 1 is a diagram showing an overview of a remote monitoring system including the charge-discharge system 10 according to the present embodiment.

[0028] As shown in FIG. 1, in the remote monitoring system, a plurality (three in FIG. 1) of supply areas 1, a server device 30 capable of collecting information of the supply area 1, a client device 40 capable of browsing information of the supply area 1, and a network N which is a communication medium are arranged. Thereby, the information of the supply area 1 can be remotely monitored by being displayed on the display device 41 of the client device 40 via the network N (and the server device 30).

[0029] The supply area 1 is a predetermined site to which power is supplied from the power system, and is divided into a predetermined area such as a customer unit, a facility unit, or a building (office) unit. In each of the supply areas 1, a charge-discharge system 10 including a power conditioner 100 and a charger / discharger 200, and a power load 20 are arranged, and power is supplied from the charge-discharge system 10 to the power load 20. The power load 20 is a power load consumed by power-consuming devices in a building (such as an office) arranged in each of the supply areas 1, or power-consuming devices installed outdoors.

[0030] The server device 30 includes a Web server function and presents information obtained from the charge / discharge system 10 within the supply area 1 in response to access from the client device 40. The server device 30 may be realized by a general-purpose computer system such as a personal computer executing a program, or may be realized by a dedicated computer system.

[0031] The network N includes a public communication network N1 which is a so-called Internet, and a carrier network N2 that realizes wireless communication according to a predetermined mobile communication standard. The public communication network N1 includes a general optical line, and the network N includes a dedicated line to which the server device 30 is connected. The carrier network N2 includes a base station BS, and the client device 40 can communicate with the server device 30 via the network N from the base station BS. An access point AP is connected to the public communication network N1, and the client device 40 can communicate with the server device 30 via the network N from the access point AP.

[0032] The client device 40 may be a desktop or laptop personal computer, or may be a so-called smartphone or tablet-type communication terminal. The client device 40 has a display device 41 such as a liquid crystal display, an input device 42 such as a keyboard and a mouse or a touch panel, a control device, a storage unit (memory), and a communication device, etc. The storage unit stores a client program including a Web browser that the control device reads and executes. A user who logs in through the login screen displayed on the Web browser of the client device 40 can access information about the system in which the user is involved, provided by the server device 30.

[0033] Next, the charge-discharge system 10 will be described in detail. FIG. 2 is a perspective view showing the configuration of the charge-discharge system 10 according to the present embodiment. Specifically, FIG. 2 is an image diagram showing the configurations of the power conditioner 100 and the charger 200 included in the charge-discharge system 10, and the state in which the vehicle power storage device 51 of the vehicle 50 is connected to the charger 200. FIG. 3 is a block diagram showing the functional configuration of the charge-discharge system 10 according to the present embodiment. Specifically, FIG. 3 shows the configuration in which the charge-discharge system 10 is connected to the vehicle power storage device 51, the power system 60, the power generation device 70, the power storage device 80, and the power load 20 in the supply area 1.

[0034] The charge-discharge system 10 is a system that performs charge and discharge with the vehicle power storage device 51, which is a power storage device of the vehicle 50, and supplies power to the power load 20 in the supply area 1 in a predetermined supply area 1 to which power is supplied from the power system 60. As shown in FIGS. 2 and 3, the charge-discharge system 10 includes a power conditioner 100 and a charger 200. In FIG. 2, five chargers 200 are illustrated, and in FIG. 3, only one charger 200 is illustrated for convenience of explanation, but the number of chargers 200 included in the charge-discharge system 10 is not particularly limited. The number of power conditioners 100 included in the charge-discharge system 10 is also not particularly limited.

[0035] That is, as shown in Fig. 2, the charging and discharging system 10 may be arranged in a centralized type charging and discharging station with parking spaces S1 to S5 arranged adjacent to each other, or may be arranged in a distributed type charging and discharging station (not shown) with parking spaces distributed (such as arranged on different floors of a building). In Fig. 2, chargers 200 are arranged in each of the parking spaces (S1, S2, ···), but it is not limited to this form, and a single charger 200 may be installed in a single parking space. A plurality of vehicles 50 (a plurality of vehicle power storage devices 51) may be connected to one charger 200. In other words, a plurality of vehicles 50 (a plurality of vehicle power storage devices 51) may be connected to the charging and discharging system 10, or only one vehicle 50 (one vehicle power storage device 51) may be connected. The charging and discharging station where the charging and discharging system 10 is arranged may be provided in a public place such as a public parking lot, or may be provided within the premises of an enterprise or an individual.

[0036] As shown in Fig. 3, the power conditioner 100 is connected to the charger 200, the power grid 60, the power generation device 70, the power storage device 80, and the power load 20, and exchanges power with them. That is, the power conditioner 100 receives power supply from the charger 200, the power grid 60, the power generation device 70, and the power storage device 80, or supplies power to the charger 200, the power grid 60, the power storage device 80, and the power load 20.

[0037] The power grid 60 is, for example, a commercial power grid owned by a power company, and alternating current power generated by a grid power source 61 such as a thermal power plant flows through it. The power grid 60 supplies the alternating current power to the power conditioner 100. The power generation device 70 is a power generation device installed within the supply area 1, and is a distributed power source device such as a solar power generation facility, a wind power generation facility, a diesel generator, a small gas turbine generator, a fuel cell, a micro hydropower generator, or binary power generation. The power generation device 70 supplies the generated power to the power conditioner 100.

[0038] The power storage device 80 is a power supply device that can charge electricity from the outside and discharge electricity to the outside. The power storage device 80 charges and discharges power via the power conditioner 100. Specifically, the power storage device 80 has a plurality of power storage elements connected in series and / or in parallel. The power storage element is a secondary battery (single cell) that can charge and discharge electricity, and is, for example, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. The power storage element is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, a capacitor, a primary battery, or a battery using a solid electrolyte, etc.

[0039] The power load 20 is a power load consumed within the supply area 1, and has specific loads 21 and 22 that are used even in emergencies such as power outages, and a general load 23 that is used during normal times. The specific load 21 is a power load used for an elevator or commercial air conditioner in a facility such as an office, and the specific load 22 is a lighting load used for lighting or a power outlet in a facility such as an office. The general load 23 is a power load other than the specific loads 21 and 22, and is a load for operating home appliances or machinery in a factory, etc.

[0040] The power conditioner 100 includes a first converter circuit 110, a second converter circuit 120, a bidirectional inverter circuit 130, a switching circuit 140, a control unit 150, and a first communication unit 160.

[0041] The first converter circuit 110 is a power converter (DC / DC converter) that performs conversion between DC powers. It is connected to the power generation device 70 and boosts and outputs the output voltage (DC) of the power generation device 70. The first converter circuit 110 may be a boost chopper. The second converter circuit 120 is a bidirectional power converter (bidirectional DC / DC converter) that performs conversion between DC powers. The power storage device 80 is connected thereto, and the power storage device 80 discharges and charges. The second converter circuit 120 may be a bidirectional chopper. The power storage device 80 can store surplus power from the power generation device 70 and power from the power grid 60 via the second converter circuit 120. When the power generation amount of the power generation device 70 is insufficient, the power storage device 80 can discharge and compensate for the insufficient power generation amount via the second converter circuit 120. The bidirectional inverter circuit 130 is a bidirectional conversion circuit that selectively performs inverse conversion (invert) of converting DC power into AC power and forward conversion (convert) of converting AC power into DC power. The bidirectional inverter circuit 130 is connected to the first converter circuit 110, the second converter circuit 120, and the power grid 60.

[0042] The switching circuit 140 has a three-phase specific load 21 and a single-phase specific load 22 connected via a transformer, and is a circuit that switches contacts to supply power to the specific loads 21 and 22 in the event of an emergency such as a power outage in the power grid 60. Normally, the switching circuit 140 connects contact point A to the power line and is configured to be able to supply power from the power grid 60 to the specific loads 21 and 22 and the like. In the event of an emergency, the switching circuit 140 switches to contact point B and is configured to be able to supply power to the specific loads 21 and 22 from the power generation device 70 and / or the power storage device 80 via the bidirectional inverter circuit 130. Thereby, backup power is supplied to the specific loads 21 and 22 from at least one of the power generation device 70, the power storage device 80, and the charge / discharge device 200 during a power outage in the power grid 60.

[0043] The control unit 150 is a control device that controls various devices within the power conditioner 100. The power conditioner 100 further includes a current detection unit and a voltage detection unit (not shown). The current detection unit is, for example, a through-type hall sensor, and detects the current flowing through the power line within the power conditioner 100. The voltage detection unit detects the voltage of the power line within the power conditioner 100. The control unit 150 has a function of calculating and acquiring the power (active power) and the amount of power flowing in and out of the power line based on the detected current and voltage. The control unit 150 also has a function of calculating the received power from the received current and the system voltage detected by an external measuring device (external transducer) 62 provided at the power receiving point of the power system 60, or acquiring the received power calculated by the external measuring device 62. Thus, the control unit 150 is configured to be able to acquire the power and the amount of power of the current flowing between the charge / discharge system 10 and the power system 60, the power generation device 70, the energy storage device 80, and the power load 20. The control unit 150 may also be configured to be able to acquire other information such as the SOC (State Of Charge) of the energy storage device 80, and the power and the amount of power of the current flowing between the power conditioner 100 and the charger 200.

[0044] The first communication unit 160 is a communication board such as a network interface card (NIC), and can communicate with external devices. The first communication unit 160 is communicably connected to the control unit 150 via a communication line (not shown), and acquires information from the control unit 150. The first communication unit 160 is also communicably connected to the second communication unit 230 of the charger 200 described later via a communication line or by wireless communication, and acquires information from the second communication unit 230 as well. The first communication unit 160 generates display data using the acquired information and transmits it to the client device 40 (display device 41). A detailed description of the first communication unit 160 will be given later.

[0045] The power conditioner 100 may be a three-phase connected power storage system that can supply power to a wide range of power loads. For example, as the power conditioner 100, by using a so-called power conditioner with a built-in power storage device 80, space can be saved.

[0046] The charger / discharger 200 is a charging / discharging stand that is connected to the vehicle power storage device 51, which is a power storage device of the vehicle 50, and performs charging and discharging with the vehicle power storage device 51. The charger / discharger 200 is also connected to the power load 20 via the power conditioner 100. During normal times, etc., it charges the vehicle power storage device 51, and during emergency times, etc., it discharges the vehicle power storage device 51 to supply power to the power load 20 such as the specific loads 21 and 22.

[0047] The vehicle 50 is an automobile (mobile body) such as an electric vehicle (EV) and a plug-in hybrid electric vehicle (PHEV), and the vehicle power storage device 51 is a battery mounted on them. The vehicle power storage device 51, similar to the power storage device 80, has a plurality of power storage elements (such as lithium-ion secondary batteries) connected in series and / or in parallel.

[0048] The charger / discharger 200 includes a charge / discharge unit 210, a control unit 220, and a second communication unit 230.

[0049] The charge / discharge unit 210 is a bidirectional conversion circuit that selectively performs forward conversion (converting) of converting AC power to DC power and reverse conversion (inverting) of converting DC power to AC power. The charge / discharge unit 210 converts the AC power from the power conditioner 100 into DC power and supplies it to the vehicle power storage device 51 to charge the vehicle power storage device 51. The charge / discharge unit 210 converts the DC power discharged from the vehicle power storage device 51 into AC power and supplies it to the power load 20 etc. via the power conditioner 100.

[0050] The control unit 220 controls the charge / discharge unit 210 by giving commands to the charge / discharge unit 210. The control unit 220 has a function of calculating (estimating) and obtaining the power and the amount of power during charging and discharging of the vehicle power storage device 51 based on the output of the charge / discharge unit 210. The control unit 220 may have a function of obtaining and monitoring the SOC of the vehicle power storage device 51. The control unit 220 may have a storage unit (memory), a display panel, an operation unit, and the like.

[0051] The second communication unit 230 is a communication board such as a network interface card (NIC) that can communicate with the first communication unit 160 of the power conditioner 100 via a communication line or by wireless communication. The second communication unit 230 acquires various information from the control unit 220 and transmits it to the first communication unit 160. Specifically, the second communication unit 230 acquires from the control unit 220 the power and the amount of power charged and discharged between the vehicle power storage device 51 and the charge / discharge unit 210 (charge / discharge system 10), and transmits it to the first communication unit 160. Thus, in the present embodiment, the first communication unit 160 functions as a master unit, and the second communication unit 230 functions as a slave unit.

[0052] When a plurality of chargers 200 are provided in the charge / discharge system 10 as shown in FIG. 2, a plurality of second communication units 230 included in the plurality of chargers 200 are configured to be able to communicate with the first communication unit 160, and information is transmitted from the plurality of second communication units 230 to the first communication unit 160. The second communication unit 230 may be configured to be able to communicate with other second communication units 230 included in other chargers 200 by wire or wirelessly, and after acquiring information from the other second communication units 230, transmit the information to the first communication unit 160.

[0053] [Explanation of the First Communication Unit 160] Next, the first communication unit 160 included in the power conditioner 100 of the charge / discharge system 10 will be described in detail. FIG. 4 is a block diagram showing the functional configuration of the first communication unit 160 according to the present embodiment. FIG. 4 shows a configuration in which the first communication unit 160 acquires information from the control unit 150 and the second communication unit 230 and transmits the information to the client device 40 (display device 41). FIG. 5 is a diagram showing an example of display data 164m displayed on the display device 41 according to the present embodiment. In FIG. 5, as an example of the display device 41, a monitor of a personal computer is illustrated, but it may also be a touch panel of a smartphone or a tablet-type communication terminal, etc.

[0054] As shown in FIG. 4, the first communication unit 160 includes an acquisition unit 161, a generation unit 162, a transmission unit 163, and a storage unit 164.

[0055] The acquisition unit 161 acquires various information including charge-side power amount information 165 (see FIG. 5) and discharge-side power amount information 166 (see FIG. 5) in a plurality of predetermined periods. The predetermined period is a predetermined period such as 1 hour, half a day, 1 day, 1 week, 1 month, etc. The plurality of predetermined periods are, for example, 1 day consisting of 24 one-hour periods, half a month consisting of a plurality of half days such as 30, 1 month consisting of a plurality of 1 days such as 30, 1 month consisting of a plurality of 1 weeks such as 4, 1 year consisting of 12 one-month periods, etc. In the present embodiment, the plurality of predetermined periods are 1 month consisting of a plurality of 1 days, and the acquisition unit 161 acquires various information such as the charge-side power amount information 165 and the discharge-side power amount information 166 on each day of the month (see FIG. 5).

[0056] The charging-side power amount information 165 is information indicating the magnitude of the power amount including the charging power amount from the charge-discharge system 10 to the vehicle power storage device 51 (the power amount charged from the charge-discharge system 10 to the vehicle power storage device 51). The charging-side power amount information 165 is information indicating the magnitude of the power amount output from the charge-discharge system 10. As shown in FIG. 5, the charging-side power amount information 165 includes vehicle charging power amount information 164a indicating the magnitude of the charging power amount of the vehicle power storage device 51 and first power amount information 164c indicating the magnitude of at least one of the charging power amount of the power storage device 80 and the power consumption amount of the power load 20. That is, the acquisition unit 161 acquires the vehicle charging power amount information 164a and the first power amount information 164c as the charging-side power amount information 165. In the present embodiment, the first power amount information 164c includes both first power amount information 164c1 indicating the magnitude of the power consumption amount of the power load 20 and first power amount information 164c2 indicating the magnitude of the charging power amount of the power storage device 80. In the present embodiment, the charging-side power amount information 165 is history information indicating the magnitude of the past power amount output from the charge-discharge system 10, but may also be estimation information indicating the magnitude of the future power amount that will be output from the charge-discharge system 10.

[0057] The discharge-side power amount information 166 is information indicating the magnitude of the power amount including the discharge power amount from the vehicle power storage device 51 to the charge-discharge system 10 (the power amount discharged from the vehicle power storage device 51 to the charge-discharge system 10). The discharge-side power amount information 166 is information indicating the magnitude of the power amount input to the charge-discharge system 10. As shown in FIG. 5, the discharge-side power amount information 166 includes vehicle discharge power amount information 164b indicating the magnitude of the discharge power amount of the vehicle power storage device 51 and second power amount information 164d indicating the magnitude of at least one of the generated power amount of the power generation device 70 and the discharge power amount of the power storage device 80. That is, the acquisition unit 161 acquires the vehicle discharge power amount information 164b and the second power amount information 164d as the discharge-side power amount information 166. In the present embodiment, the second power amount information 164d includes both second power amount information 164d1 indicating the magnitude of the generated power amount of the power generation device 70 and second power amount information 164d2 indicating the magnitude of the discharge power amount of the power storage device 80. In the present embodiment, the discharge-side power amount information 166 is history information indicating the magnitude of the past power amount input to the charge-discharge system 10, but may also be estimation information indicating the magnitude of the future power amount that will be input to the charge-discharge system 10.

[0058] The acquisition unit 161 acquires vehicle charge power amount information 164a, vehicle discharge power amount information 164b, etc. from the second communication unit 230 of the charger 200. The acquisition unit 161 acquires first power amount information 164c (164c1 and 164c2), as well as second power amount information 164d (164d1 and 164d2), etc. from the control unit 150 of the power conditioner 100. The acquisition unit 161 writes and stores various information such as the acquired vehicle charge power amount information 164a, vehicle discharge power amount information 164b, first power amount information 164c (164c1 and 164c2), and second power amount information 164d (164d1 and 164d2) in the storage unit 164.

[0059] The acquisition unit 161 is configured to be able to acquire selection information 41a, which is information indicating that at least one of the charge-side power amount display information 167 (see FIG. 5) and the discharge-side power amount display information 168 (see FIG. 5) displayed on the display device 41 is selected.

[0060] The charging-side power amount display information 167 is information for displaying the charging-side power amount information 165 on the display device 41. As shown in FIG. 5, it includes vehicle charging power amount display information 164i and first power amount display information 164k. The vehicle charging power amount display information 164i is information for displaying the vehicle charging power amount information 164a (information indicating the magnitude of the charging power amount of the vehicle power storage device 51) on the display device 41. The first power amount display information 164k is information for displaying the first power amount information 164c (information indicating the magnitude of at least one of the charging power amount of the power storage device 80 and the power consumption amount of the power load 20) on the display device 41. In the present embodiment, the first power amount display information 164k includes first power amount display information 164k1 for displaying the first power amount information 164c1 and first power amount display information 164k2 for displaying the first power amount information 164c2.

[0061] The vehicle charging power amount display information 164i and the first power amount display information 164k (164k1 and 164k2) are displayed on the display device 41 by distinguishable characters, symbols, figures, etc. (figures and characters in FIG. 5). The vehicle charging power amount display information 164i is displayed by a figure of the same pattern (hatching) or the same color as the vehicle charging power amount information 164a and the character "EV charge amount". The first power amount display information 164k1 is displayed by a figure of the same pattern (hatching) or the same color as the first power amount information 164c1 and the character "load consumption amount". The first power amount display information 164k2 is displayed by a figure of the same pattern (hatching) or the same color as the first power amount information 164c2 and the character "ESS charge amount".

[0062] The discharge-side power amount display information 168 is information for displaying the discharge-side power amount information 166 on the display device 41. As shown in FIG. 5, it includes vehicle discharge power amount display information 164j and second power amount display information 164l. The vehicle discharge power amount display information 164j is information for displaying the vehicle discharge power amount information 164b (information indicating the magnitude of the discharge power amount of the vehicle power storage device 51) on the display device 41. The second power amount display information 164l is information for displaying the second power amount information 164d (information indicating the magnitude of at least one of the power generation amount of the power generation device 70 and the discharge power amount of the power storage device 80) on the display device 41. In the present embodiment, the second power amount display information 164l includes second power amount display information 164l1 for displaying the second power amount information 164d1 and second power amount display information 164l2 for displaying the second power amount information 164d2.

[0063] The vehicle discharge power amount display information 164j and the second power amount display information 164l (164l1 and 164l2) are displayed on the display device 41 by discriminative characters, symbols, figures, etc. (figures and characters in FIG. 5). The vehicle discharge power amount display information 164j is displayed by a figure with the same pattern (hatching) or the same color as the vehicle discharge power amount information 164b and the characters "EV discharge amount". The second power amount display information 164l1 is displayed by a figure with the same pattern (hatching) or the same color as the second power amount information 164d1 and the characters "PV power generation amount". The second power amount display information 164l2 is displayed by a figure with the same pattern (hatching) or the same color as the second power amount information 164d2 and the characters "ESS discharge amount".

[0064] The selection information 41a is information indicating that at least one of the vehicle charging power amount display information 164i, the first power amount display information 164k (164k1 and 164k2), the vehicle discharging power amount display information 164j, and the second power amount display information 164l (164l1 and 164l2) displayed on the display device 41 is selected. When the user selects (such as clicks) at least one of these pieces of information displayed on the display device 41 of the client device 40, the selection information 41a indicating which information is selected is transmitted from the client device 40 (display device 41) to the acquisition unit 161. The acquisition unit 161 acquires the selection information 41a transmitted from the client device 40 (display device 41).

[0065] The generation unit 162 generates display data 164m for causing the display device 41 of the client device 40 to display a screen including various pieces of information as shown in FIG. 5. Specifically, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the charging-side power amount information 165 and the discharging-side power amount information 166 are displayed for each predetermined period in a calendar in which a plurality of predetermined periods are arranged. As described above, in the present embodiment, the predetermined period is one day, and the plurality of predetermined periods are one month consisting of a plurality of one-day periods. Therefore, the above calendar is one in which one month of any month (March in FIG. 5) is divided into days, and is arranged and displayed for each week (Sunday to Saturday).

[0066] Specifically, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which a charging-side power amount graphic 165a is displayed as the charging-side power amount information 165 and a discharging-side power amount graphic 166a is displayed as the discharging-side power amount information 166. The charging-side power amount graphic 165a is a graphic indicating the magnitude (value of the power amount) of the power amount indicated by the charging-side power amount information 165. In FIG. 5, the charging-side power amount graphic 165a is shown as a rectangular bar graph with the magnitude (numerical value) of the power amount of the charging-side power amount information 165 as the height. The discharging-side power amount graphic 166a is a graphic indicating the magnitude (value of the power amount) of the power amount indicated by the discharging-side power amount information 166. In FIG. 5, the discharging-side power amount graphic 166a is shown as a rectangular bar graph with the magnitude (numerical value) of the power amount of the discharging-side power amount information 166 as the height.

[0067] The generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the charging-side power amount information 165 and the discharging-side power amount information 166 are displayed in the same positional relationship at each predetermined period. That is, in each predetermined period, the charging-side power amount information 165 is arranged on the same side with respect to the discharging-side power amount information 166. In FIG. 5, on each day, the charging-side power amount information 165 and the discharging-side power amount information 166 are arranged side by side in the left-right direction such that the charging-side power amount information 165 is located on the left side and the discharging-side power amount information 166 is located on the right side. Further, in each predetermined period (each day), the charging-side power amount information 165 and the discharging-side power amount information 166 have the same graphic (in FIG. 5, the same pattern, but the same color may also be used).

[0068] The generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the vehicle charging power amount information 164a and the first power amount information 164c (164c1 and 164c2) are displayed as the charging-side power amount information 165. Specifically, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the first power amount information 164c (164c1 and 164c2) is displayed closer to the vehicle charging power amount information 164a than the vehicle discharge power amount information 164b. More specifically, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which a vehicle charging power amount graphic 164e and first power amount graphics 164g (164g1 and 164g2) are displayed side by side as the charging-side power amount information 165. The vehicle charging power amount graphic 164e is a graphic indicating the magnitude (value of the power amount) of the power amount indicated by the vehicle charging power amount information 164a. The first power amount graphics 164g (164g1 and 164g2) are graphics indicating the magnitude (value of the power amount) of the power amount indicated by the first power amount information 164c (164c1 and 164c2). In FIG. 5, the vehicle charging power amount graphic 164e and the first power amount graphics 164g (164g1 and 164g2) are shown as rectangular bar graphs with the magnitude (numerical value) of the power amount as the height, and are stacked vertically.

[0069] The generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which vehicle discharge power amount information 164b and second power amount information 164d (164d1 and 164d2) are displayed as discharge-side power amount information 166. Specifically, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the second power amount information 164d (164d1 and 164d2) is displayed closer to the vehicle discharge power amount information 164b than the vehicle charge power amount information 164a. More specifically, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which a vehicle discharge power amount graphic 164f and second power amount graphics 164h (164h1 and 164h2) are displayed side by side as discharge-side power amount information 166. The vehicle discharge power amount graphic 164f is a graphic indicating the magnitude (value of the power amount) of the power amount indicated by the vehicle discharge power amount information 164b. The second power amount graphics 164h (164h1 and 164h2) are graphics indicating the magnitude (value of the power amount) of the power amount indicated by the second power amount information 164d (164d1 and 164d2). In FIG. 5, the vehicle discharge power amount graphic 164f and the second power amount graphics 164h (164h1 and 164h2) are shown as rectangular bar graphs with the magnitude (numerical value) of the power amount as the height, and are stacked vertically.

[0070] The generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which a numerical value indicating the magnitude of the power amount indicated by the charge-side power amount information 165 is further displayed at a position corresponding to the charge-side power amount graphic 165a as charge-side power amount information 165. That is, numerical values (such as kWh) indicating the magnitudes of the power amounts indicated by the vehicle charge power amount information 164a and the first power amount information 164c (164c1 and 164c2) are displayed at positions corresponding to the vehicle charge power amount graphic 164e and the first power amount graphics 164g (164g1 and 164g2). In FIG. 5, the values of the power amounts of the vehicle charge power amount information 164a and the first power amount information 164c (164c1 and 164c2) are displayed inside the vehicle charge power amount graphic 164e and the first power amount graphics 164g (164g1 and 164g2).

[0071] The generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which a numerical value indicating the magnitude of the discharge-side power amount indicated by the discharge-side power amount information 166 is further displayed at a position corresponding to the discharge-side power amount graphic 166a as the discharge-side power amount information 166. That is, at positions corresponding to the vehicle discharge power amount graphic 164f and the second power amount graphics 164h (164h1 and 164h2), numerical values (such as kWh) indicating the magnitudes of the vehicle discharge power amount information 164b and the second power amount information 164d (164d1 and 164d2) are displayed. In FIG. 5, the values of the vehicle discharge power amount information 164b and the second power amount information 164d (164d1 and 164d2) are displayed inside the vehicle discharge power amount graphic 164f and the second power amount graphics 164h (164h1 and 164h2).

[0072] The generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the charge-side power amount display information 167 for displaying the charge-side power amount information 165 and the discharge-side power amount display information 168 for displaying the discharge-side power amount information 166 are further displayed. When the acquisition unit 161 does not acquire the selection information 41a indicating that the charge-side power amount display information 167 has been selected, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the charge-side power amount information 165 is not displayed. When the acquisition unit 161 does not acquire the selection information 41a indicating that the discharge-side power amount display information 168 has been selected, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the discharge-side power amount information 166 is not displayed.

[0073] A detailed description of the process in which the above-described generation unit 162 generates the display data 164m will be given later. Various types of information necessary for the generation unit 162 to generate the display data 164m are stored in the storage unit 164, and the generation unit 162 reads and acquires the information from the storage unit 164. These pieces of information may be stored in the storage unit 164 in advance, or the information acquired by the acquisition unit 161 may be written and stored in the storage unit 164. The generation unit 162 may acquire information from a processing unit other than the storage unit 164 (such as an input from a user). The generation unit 162 writes the generated display data 164m to the storage unit 164 for storage.

[0074] The transmission unit 163 transmits the display data 164m to the display device 41. The transmission unit 163 reads and acquires the display data 164m generated by the generation unit 162 and stored in the storage unit 164, and transmits it to the client device 40 (display device 41). As a result, as shown in FIG. 5, the display data 164m is displayed on the display device 41 of the client device 40.

[0075] The storage unit 164 is a memory that stores data such as that acquired by the acquisition unit 161, data necessary for the generation unit 162 to generate the display data 164m, and display data 164m generated by the generation unit 162. The storage unit 164 stores vehicle charge power amount information 164a, vehicle discharge power amount information 164b, first power amount information 164c, second power amount information 164d, vehicle charge power amount graph 164e, vehicle discharge power amount graph 164f, first power amount graph 164g, second power amount graph 164h, vehicle charge power amount display information 164i, vehicle discharge power amount display information 164j, first power amount display information 164k, second power amount display information 164l, and display data 164m. The storage unit 164 may store data other than the above, such as data during the process of the generation unit 162 generating the display data 164m. In the storage unit 164, when there is a change in these data, these data are updated each time, but these data may be accumulated.

[0076] [Explanation of the processing flow of the charge and discharge system 10] Next, the processes performed by the charge-discharge system 10 (control method of the charge-discharge system 10) will be described. FIG. 6 is a flowchart showing the processes performed by the charge-discharge system 10 (control method of the charge-discharge system) according to the present embodiment. FIG. 6 shows the processes performed by each processing unit of the first communication unit 160 included in the power conditioner 100 of the charge-discharge system 10.

[0077] As shown in FIG. 6, first, the acquisition unit 161 acquires various information such as charge-side power amount information 165 and discharge-side power amount information 166 in a plurality of predetermined periods (S102). Since the details of each piece of information acquired by the acquisition unit 161 are as described above, the description thereof will be omitted.

[0078] Then, the generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen on which the charge-side power amount information 165 and the discharge-side power amount information 166 are displayed for each predetermined period in a calendar in which a plurality of predetermined periods are arranged (S104). A detailed description of the process of the generation unit 162 generating the display data 164m will be described later.

[0079] Then, the transmission unit 163 transmits the display data 164m generated by the generation unit 162 to the display device 41 of the client device 40 (S106).

[0080] After that, when the acquisition unit 161 acquires the selection information 41a, the selection information acquisition process by the generation unit 162 is performed (S108). A detailed description of the selection information acquisition process performed by the generation unit 162 will be described later.

[0081] As described above, the processes performed by the charge-discharge system 10 (first communication unit 160) (control method of the charge-discharge system) are completed.

[0082] Next, the process of the generation unit 162 generating the display data 164m (S104 in FIG. 6) will be described in detail. FIGS. 7 and 8 are flowcharts showing the process of the generation unit 162 of the first communication unit 160 according to the present embodiment generating the display data 164m.

[0083] As shown in FIG. 5, the generation unit 162 generates display data 164m for causing the display device 41 to display the following screens.

[0084] As shown in FIG. 7, first, the generation unit 162 displays a charging-side power amount graphic 165a as charging-side power amount information 165 and a discharging-side power amount graphic 166a as discharging-side power amount information 166 (S202 in FIG. 7).

[0085] Specifically, the generation unit 162 displays vehicle charging power amount information 164a and first power amount information 164c (164c1 and 164c2) as the charging-side power amount information 165. Then, the generation unit 162 displays the first power amount information 164c (164c1 and 164c2) closer to the vehicle charging power amount information 164a than the vehicle discharging power amount information 164b. Specifically, the generation unit 162 displays the vehicle charging power amount graphic 164e and the first power amount graphics 164g (164g1 and 164g2) side by side (stacked) as the charging-side power amount information 165 (S302 in FIG. 8).

[0086] Then, the generation unit 162 displays vehicle discharging power amount information 164b and second power amount information 164d (164d1 and 164d2) as the discharging-side power amount information 166. Then, the generation unit 162 displays the second power amount information 164d (164d1 and 164d2) closer to the vehicle discharging power amount information 164b than the vehicle charging power amount information 164a. Specifically, the generation unit 162 displays the vehicle discharging power amount graphic 164f and the second power amount graphics 164h (164h1 and 164h2) side by side (stacked) as the discharging-side power amount information 166 (S304 in FIG. 8).

[0087] Next, the generation unit 162 further displays a numerical value indicating the magnitude of the amount of power shown by the charging-side power amount information 165 and a numerical value indicating the magnitude of the amount of power shown by the discharging-side power amount information 166 (S204 in FIG. 7). Specifically, the generation unit 162 further displays the numerical value of the amount of power of the charging-side power amount information 165 at a position corresponding to the charging-side power amount graphic 165a, and further displays the numerical value of the amount of power of the discharging-side power amount information 166 at a position corresponding to the discharging-side power amount graphic 166a. More specifically, the generation unit 162 displays the vehicle charging power amount information 164a and the power amount values of the first power amount information 164c (164c1 and 164c2) at positions (inside the graphic) corresponding to the vehicle charging power amount graphic 164e and the first power amount graphic 164g (164g1 and 164g2). The generation unit 162 displays the vehicle discharging power amount information 164b and the power amount values of the second power amount information 164d (164d1 and 164d2) at positions (inside the graphic) corresponding to the vehicle discharging power amount graphic 164f and the second power amount graphic 164h (164h1 and 164h2).

[0088] Then, the generation unit 162 displays the charging-side power amount information 165 and the discharging-side power amount information 166 so as to have the same positional relationship at each predetermined period (S206 in FIG. 7). That is, the generation unit 162 arranges the charging-side power amount information 165 to be located on the same side (left side) with respect to the discharging-side power amount information 166 at each predetermined period.

[0089] Then, the generation unit 162 further displays charging-side power amount display information 167 for displaying the charging-side power amount information 165 and discharging-side power amount display information 168 for displaying the discharging-side power amount information 166 (S208 in FIG. 7). Specifically, the generation unit 162 displays the vehicle charging power amount display information 164i included in the charging-side power amount display information 167 and the first power amount display information 164k (164k1 and 164k2) at a position adjacent to the calendar display (below the calendar display in FIG. 5). The generation unit 162 also displays the vehicle discharging power amount display information 164j included in the discharging-side power amount display information 168 and the second power amount display information 164l (164l1 and 164l2) at a position adjacent to the calendar display (below the calendar display in FIG. 5).

[0090] In this way, the process in which the generation unit 162 generates the display data 164m (S104 in FIG. 6) ends.

[0091] Next, the selection information acquisition process (S108 in FIG. 6) performed by the generation unit 162 will be described in detail. FIG. 9 is a flowchart showing the selection information acquisition process performed by the generation unit 162 according to the present embodiment. FIGS. 10 and 11 are diagrams showing an example of the display data 164m generated by the generation unit 162 performing the selection information acquisition process according to the present embodiment.

[0092] As shown in FIG. 9, the generation unit 162 determines whether the acquisition unit 161 has acquired selection information 41a indicating that the charging-side power amount display information 167 (vehicle charging power amount display information 164i, first power amount display information 164k1 or 164k2) has been selected (S402). When the user clicks or touches the charging-side power amount display information 167 displayed on the display device 41 of the client device 40 via the input device 42 to make a selection, the selection information 41a indicating that the charging-side power amount display information 167 has been selected is transmitted to the acquisition unit 161. When the acquisition unit 161 acquires the selection information 41a, the generation unit 162 determines that the acquisition unit 161 has acquired the selection information 41a indicating that the charging-side power amount display information 167 has been selected.

[0093] When the generation unit 162 determines that the acquisition unit 161 has acquired the selection information 41a indicating that the charging-side power amount display information 167 has been selected (YES in S402), the generation unit 162 generates the display data 164m for causing the display device 41 to display the calendar screen on which the charging-side power amount information 165 is displayed (S404). When the generation unit 162 determines that the acquisition unit 161 has not acquired the selection information 41a indicating that the charging-side power amount display information 167 has been selected (NO in S402), the generation unit 162 generates the display data 164m for causing the display device 41 to display the calendar screen on which the charging-side power amount information 165 is not displayed (S406).

[0094] The generation unit 162 determines whether the acquisition unit 161 has acquired the selection information 41a indicating that the discharge-side power amount display information 168 (the vehicle discharge power amount display information 164j, the second power amount display information 164l1 or 164l2) has been selected (S408). When the user clicks or touches the discharge-side power amount display information 168 displayed on the display device 41 of the client device 40 via the input device 42 to select it, the selection information 41a indicating that the discharge-side power amount display information 168 has been selected is transmitted to the acquisition unit 161. When the acquisition unit 161 acquires the selection information 41a, the generation unit 162 determines that the acquisition unit 161 has acquired the selection information 41a indicating that the discharge-side power amount display information 168 has been selected.

[0095] When the generation unit 162 determines that the acquisition unit 161 has acquired the selection information 41a indicating that the discharge-side power amount display information 168 has been selected (YES in S408), the generation unit 162 generates the display data 164m for causing the display device 41 to display the calendar screen on which the discharge-side power amount information 166 is displayed (S410). When the generation unit 162 determines that the acquisition unit 161 has not acquired the selection information 41a indicating that the discharge-side power amount display information 168 has been selected (NO in S408), the generation unit 162 generates the display data 164m for causing the display device 41 to display the calendar screen on which the discharge-side power amount information 166 is not displayed (S412).

[0096] In FIG. 10, among the discharge-side power amount display information 168, the second power amount display information 164l1 for displaying the second power amount information 164d1 indicating the magnitude of the power generation amount of the power generation device 70 is selected (a figure having the same pattern or the same color as the second power amount figure 164h1 is displayed). For this reason, in FIG. 10, the generation unit 162 determines that the acquisition unit 161 has acquired the selection information 41a indicating that the second power amount display information 164l1 among the discharge-side power amount display information 168 has been selected. Accordingly, the generation unit 162 generates the display data 164m for causing the display device 41 to display the calendar screen on which the second power amount information 164d1 (the second power amount figure 164h1 and the power amount value) among the discharge-side power amount information 166 is displayed.

[0097] In FIG. 11, in addition to the state of FIG. 10, among the charge-side power amount display information 167, the vehicle charge power amount display information 164i for displaying the vehicle charge power amount information 164a indicating the magnitude of the charge power amount of the vehicle power storage device 51 is selected (a figure having the same pattern or the same color as the vehicle charge power amount figure 164e is displayed). For this reason, in FIG. 11, the generation unit 162 determines that the acquisition unit 161 has acquired the selection information 41a indicating that the vehicle charge power amount display information 164i among the charge-side power amount display information 167 and the second power amount display information 164l1 among the discharge-side power amount display information 168 have been selected. Accordingly, in addition to the state of FIG. 10, the generation unit 162 generates the display data 164m for causing the display device 41 to display the calendar screen on which the vehicle charge power amount information 164a (the vehicle charge power amount figure 164e and the power amount value) among the charge-side power amount information 165 is displayed.

[0098] As described above, the selection information acquisition process (S108 in FIG. 6) performed by the generation unit 162 ends.

[0099] [Description of Effects] As described above, the charge / discharge system 10 according to the present embodiment generates display data 164m for causing the display device 41 to display a calendar screen on which charge-side power amount information 165 and discharge-side power amount information 166 are displayed for each predetermined period in a calendar in which a plurality of predetermined periods are arranged in series, and transmits the display data 164m to the display device 41. That is, the charge / discharge system 10 transmits display data 164m of a calendar screen on which information (such as charge / discharge history) indicating the magnitude of the power amount including the charge / discharge power amount between the charge / discharge system 10 and the vehicle power storage device 51 is displayed for each predetermined period of the calendar to the display device 41. If the information indicating the magnitude of the power amount can be displayed for each predetermined period of the calendar, it is easy to intuitively grasp the situation of the power amount. Therefore, since the power (power amount) exchange between the charge / discharge system 10 and the vehicle power storage device 51 and the like in the charge / discharge system 10 can be displayed in a calendar on the screen of the display device 41, the power exchange in the charge / discharge system 10 can be easily grasped.

[0100] The charge / discharge system 10 generates display data 164m for causing the display device 41 to display a calendar screen on which a charge-side power amount graph 165a and a discharge-side power amount graph 166a are displayed. That is, the charge / discharge system 10 generates display data 164m for causing the display device 41 to display a calendar screen on which a graph indicating the magnitude of the power amount including the charge / discharge power amount between the charge / discharge system 10 and the vehicle power storage device 51 is displayed. If the graph indicating the magnitude of the power amount can be displayed for each predetermined period of the calendar, it is easy to intuitively grasp the situation of the power amount. Therefore, since the power (power amount) exchange between the charge / discharge system 10 and the vehicle power storage device 51 and the like in the charge / discharge system 10 can be displayed in a calendar in the form of a graph on the screen of the display device 41, the power exchange in the charge / discharge system 10 can be easily grasped.

[0101] The charge / discharge system 10 generates display data 164m for causing the display device 41 to display a calendar screen on which numerical values indicating the magnitudes of the charge-side power amount information 165 and the discharge-side power amount information 166 are further displayed at positions corresponding to the charge-side power amount graph 165a and the discharge-side power amount graph 166a. That is, the charge / discharge system 10 generates display data 164m for a calendar screen on which a numerical value indicating the magnitude of the power amount is further displayed at a position corresponding to a graph indicating the magnitude of the power amount including the charge / discharge power amount with the vehicle power storage device 51. If the numerical value of the power amount is displayed at the position corresponding to the graph of the power amount, it is easy to intuitively grasp the situation of the power amount. Therefore, since the exchange of power (power amount) between the vehicle power storage device 51 and the like in the charge / discharge system 10 can be calendar-displayed in the form of a graph and numerical values on the screen of the display device 41, the power exchange in the charge / discharge system 10 can be easily grasped.

[0102] The charge / discharge system 10 generates display data 164m for causing the display device 41 to display a calendar screen on which the information on the power amount including the charge power amount with the vehicle power storage device 51 and the information on the power amount including the discharge power amount are displayed in the same positional relationship at regular intervals. If the information on the power amount including the charge power amount (charge-side power amount information 165) and the information on the power amount including the discharge power amount (discharge-side power amount information 166) are displayed in the same positional relationship at regular intervals, it is easy to intuitively grasp the situation of the power amount (which is excessive, whether the balance is maintained, etc.). Therefore, since the exchange of power (power amount) between the vehicle power storage device 51 and the like in the charge / discharge system 10 can be calendar-displayed on the screen of the display device 41 in the same positional relationship, the power exchange in the charge / discharge system 10 can be easily grasped.

[0103] The charge / discharge system 10 generates display data 164m of a calendar screen in which vehicle charge power amount information 164a and first power amount information 164c are displayed as charge-side power amount information 165, and vehicle discharge power amount information 164b and second power amount information 164d are displayed as discharge-side power amount information 166. That is, when at least one of the power generation device 70 and the power storage device 80 is connected to the charge / discharge system 10, information indicating the magnitude of the charge power amount of the vehicle power storage device 51 and information indicating the magnitude of at least one of the charge power amount of the power storage device 80 and the power consumption amount of the power load 20 are used as the charge-side power amount information 165. Information indicating the magnitude of the discharge power amount of the vehicle power storage device 51 and information indicating the magnitude of at least one of the power generation amount of the power generation device 70 and the discharge power amount of the power storage device 80 are used as the discharge-side power amount information 166. Thereby, even when at least one of the power generation device 70 and the power storage device 80 is connected to the charge / discharge system 10, the power (power amount) exchange between the charge / discharge system 10 and at least one of the power generation device 70 and the power storage device 80 can be displayed in a calendar format on the screen of the display device 41. Therefore, the power exchange in the charge / discharge system 10 can be easily grasped.

[0104] The charge / discharge system 10 generates display data 164m for causing the display device 41 to display a calendar screen in which the first power amount information 164c is displayed near the vehicle charge power amount information 164a and the second power amount information 164d is displayed near the vehicle discharge power amount information 164b. By displaying the vehicle charge power amount information 164a and the first power amount information 164c as the charge-side power amount information 165 close to each other, and the vehicle discharge power amount information 164b and the second power amount information 164d as the discharge-side power amount information 166 close to each other, it is easy to intuitively grasp the power amount situation. Therefore, since the power (power amount) exchange in the charge / discharge system 10 can be collectively displayed in a calendar format on the screen of the display device 41 for each of the charge-side power amount information 165 and the discharge-side power amount information 166, the power exchange in the charge / discharge system 10 can be easily grasped.

[0105] The charge / discharge system 10 generates display data 164m of a calendar screen in which figures indicating the magnitudes of the vehicle charge power amount information 164a and the first power amount information 164c are arranged, and figures indicating the magnitudes of the vehicle discharge power amount information 164b and the second power amount information 164d are arranged. That is, as figures indicating the magnitudes of the charge-side power amount information 165, a figure indicating the magnitude of the charge power amount of the vehicle power storage device 51 and a figure indicating at least one of the magnitude of the charge power amount of the power storage device 80 and the magnitude of the power consumption amount of the power load 20 are arranged. As figures indicating the magnitudes of the discharge-side power amount information 166, a figure indicating the magnitude of the discharge power amount of the vehicle power storage device 51 and a figure indicating at least one of the magnitude of the power generation amount of the power generation device 70 and the magnitude of the discharge power amount of the power storage device 80 are arranged. Thereby, it is easy to intuitively grasp and compare (such as which is excessive or whether the balance is achieved) the magnitude of the charge-side power amount information 165 and the magnitude of the discharge-side power amount information 166. Therefore, since the power (power amount) transaction in the charge / discharge system 10 can be displayed in a calendar on the screen of the display device 41 with the magnitudes of the charge-side power amount information 165 and the discharge-side power amount information 166 being easily understandable, the power transaction in the charge / discharge system 10 can be easily grasped.

[0106] When the charge / discharge system 10 does not acquire information indicating that the charge-side power amount display information 167 or the discharge-side power amount display information 168 is selected, it generates display data 164m of a calendar screen in which the charge-side power amount information 165 or the discharge-side power amount information 166 is not displayed. Thereby, since the unselected information among the charge-side power amount information 165 and the discharge-side power amount information 166 is not displayed on the calendar screen, the desired information can be selectively displayed, and it is easy to intuitively grasp the power amount situation. Therefore, since the power (power amount) transaction in the charge / discharge system 10 can be displayed in a calendar on the screen of the display device 41 by narrowing down to the desired target, the power transaction in the charge / discharge system 10 can be easily grasped.

[0107] As described above, since the charging and discharging system 10 can cause the display device 41 to display a calendar screen that is neither too difficult nor too simple, the display device 41 can easily grasp the power transactions in the charging and discharging system 10. By viewing such a calendar screen, the characteristics and trends of dates or days of the week can be intuitively understood, and the operation of the vehicle 50 (such as a commercial vehicle or a sales vehicle) can be improved, so that the optimization of energy management can be achieved. Since the calendar can be displayed on the screen of the display device 41 by narrowing down the target to be viewed, the optimization of energy management can be achieved, such as increasing the charge amount of the power storage device 80 on weekends to prepare for an increase in the consumption of the power load 20 on Monday.

[0108] For public facilities or private facilities considering the introduction of the charging and discharging system 10, it is not preferable for the power reception from the power grid 60 to increase with the system operation. By grasping the power transactions in the charging and discharging system 10 and efficiently receiving power from the power grid 60, an increase in the electricity bill can be suppressed, and the introduction of the charging and discharging system 10 can be promoted. It can also contribute to strengthening the disaster prevention function of public facilities or strengthening the BCP (business continuity plan during power outages) of private facilities.

[0109] Since the charging and discharging system 10 that can easily grasp the power transactions can be provided, it contributes to Goal 7 of the Sustainable Development Goals (SDGs) led by the United Nations, "Ensure access for all people to affordable, reliable and sustainable modern energy."

[0110] [Description of 5 Modification Examples] As described above, the charging and discharging system 10 and the like according to the present embodiment have been described. However, the present invention is not limited to the above embodiment. The embodiments disclosed this time are illustrative in all respects and not restrictive, and the scope of the present invention includes all modifications within the meaning and scope equivalent to the claims.

[0111] In the above embodiment, when a frame within a segmented period (within the date frame) is selected, the magnitudes (numerical values) of the power amounts indicated by the figures displayed within the frame may be listed for each item (for each figure). That is, when the acquisition unit 161 acquires information indicating that the frame has been selected, the generation unit 162 generates display data 164m for causing the display device 41 to display a screen on which the magnitudes (numerical values) of the power amounts indicated by the figures displayed within the frame are listed for each item. Thereby, the transmission unit 163 transmits the display data 164m to the display device 41, and a screen on which the magnitudes (numerical values) of the power amounts indicated by the figures displayed within the frame are listed for each item is displayed on the display device 41 of the client device 40.

[0112] In the above embodiment, the function of the first communication unit 160 may be provided in the second communication unit 230, or may be provided in devices within the other charge / discharge system 10, or devices outside the charge / discharge system 10 (such as the server device 30 or the client device 40).

[0113] In the above embodiment, the display data 164m may be displayed not on the display device 41 of the client device 40 but on the display device of the server device 30 or on the display device of a device within the charge / discharge system 10 (the power conditioner 100 or the charger 200).

[0114] In the above embodiment, both the power generation device 70 and the power storage device 80 are connected to the charge / discharge system 10, but at least one of the power generation device 70 and the power storage device 80 may be connected. Or, neither the power generation device 70 nor the power storage device 80 may be connected to the charge / discharge system 10.

[0115] In the above embodiment, the power conditioner 100 and the charger 200 of the charge / discharge system 10 may be integrated. The function of the charger 200 may be built into the power conditioner 100, or the function of the power conditioner 100 may be built into the charger 200.

[0116] In the above embodiment, the first communication unit 160 is assumed to have the storage unit 164. However, it may not have the storage unit 164, store information in an external recording medium, and acquire information from the recording medium.

[0117] In the above embodiment, the calendar screen displayed by the display data 164m may not be a screen divided by each day for one month, but may be a screen divided by any period into any period. The calendar screen may be a screen divided by each hour for one day, a screen divided by each half day for half a month, a screen divided by each week for one month, or a screen divided by each month for one year.

[0118] In the above embodiment, the charge-side power amount graph 165a, the discharge-side power amount graph 166a, and the graphs included therein are assumed to be rectangular bar graphs with the magnitude (numerical value) of the power amount as the height. However, they may be graphs of any shape such as triangles or circles.

[0119] In the above embodiment, the numerical value of the power amount is assumed to be displayed inside the graphs included in the charge-side power amount graph 165a and the discharge-side power amount graph 166a. However, the numerical value may be displayed outside the graph and at a position adjacent to the graph, or at any other position.

[0120] In the above embodiment, the charge-side power amount information 165 is assumed to display the charge-side power amount graph 165a and the numerical value of the power amount. However, either one of the charge-side power amount graph 165a and the numerical value of the power amount may not be displayed. As the charge-side power amount information 165, characters, symbols, etc. different from the charge-side power amount graph 165a and the numerical value of the power amount may be displayed. The same applies to the discharge-side power amount information 166.

[0121] In the above-described embodiment, the charging-side power amount information 165 is arranged on the left side of the discharging-side power amount information 166. However, it may be arranged at any position such as on the right side, upper side, or lower side of the discharging-side power amount information 166. The charging-side power amount information 165 and the discharging-side power amount information 166 do not have to be displayed in the same positional relationship.

[0122] In the above-described embodiment, as the charging-side power amount information 165, the vehicle charging power amount graphic 164e and the first power amount graphic 164g (164g1 and 164g2) are vertically arranged (stacked) and displayed. However, they may be horizontally arranged and displayed. The vehicle charging power amount graphic 164e and the first power amount graphic 164g may be displayed close to each other without being arranged side by side, or may be displayed at a relatively distant position. The same applies to the discharging-side power amount information 166.

[0123] In the above-described embodiment, the various processes performed by the generation unit 162 may be in a different order. The processes of S202 to S208 in FIG. 7 may be arbitrarily rearranged. The process of S302 and the process of S304 in FIG. 8 may be swapped. The processes of S402 to S406 and the processes of S408 to S412 in FIG. 9 may be swapped.

[0124] The present invention can be realized not only as a charge-discharge system 10 and a control method for the charge-discharge system 10, but also as a program for causing a computer to execute processes included in the control method for the charge-discharge system 10. That is, each component included in the first communication unit 160 of the charge-discharge system 10 may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. The present invention can also be realized as a computer-readable non-transitory recording medium on which the program is recorded, for example, a flexible disk, a hard disk, a CD-ROM, an MO, a DVD, a DVD-ROM, a DVD-RAM, a BD (Blu-ray (registered trademark) Disc), or a semiconductor memory. The program can be distributed via the recording medium and a transmission medium such as the Internet. The present invention can also be realized as an integrated circuit including a processing unit included in the charge-discharge system 10. That is, each functional block of the first communication unit 160 of the charge-discharge system 10 shown in FIG. 4 may be realized as an LSI (Large Scale Integration) which is an integrated circuit. These may be individually formed into one chip, or may be formed into one chip so as to include some or all of them. Thus, in the first communication unit 160 of the charge-discharge system 10, each component may be configured by dedicated hardware, or may be realized by executing a software program suitable for each component.

[0125] A form constructed by combining any components in the above-described embodiments and their modified examples is also included in the scope of the present invention.

Industrial Applicability

[0126] The present invention can be applied to a charge-discharge system that performs charge-discharge with a power storage device included in a vehicle.

Explanation of Reference Numerals

[0127] 1 Supply area 10 Charge-discharge system 20 Power load 30 Server device 40 Client device 41 Display device 41a Selection information 50 Vehicle 51 Vehicle power storage device 60 Power system 70 Power generation device 80 Power storage device 100 Power conditioner 160 First communication unit 161 Acquisition unit 162 Generation unit 163 Transmission unit 164 Memory unit 164a Vehicle charging power amount information 164b Vehicle discharging power amount information 164c, 164c1, 164c2 First power amount information 164d, 164d1, 164d2 Second power amount information 164e Vehicle charging power amount graph 164f Vehicle discharging power amount graph 164g, 164g1, 164g2 First power amount graph 164h, 164h1, 164h2 Second power amount graph 164i Vehicle charging power amount display information 164j Vehicle discharging power amount display information 164k, 164k1, 164k2 First power amount display information 164l, 164l1, 164l2 Second power amount display information 164m Display data 165 Charging side power amount information 165a Charging side power amount graph 166 Discharging side power amount information 166a Discharging side power amount graph 167 Charging side power amount display information 168 Discharging side power amount display information 200 Charger / discharger 230 Second communication unit

Claims

1. A charge / discharge system that performs charge / discharge with a vehicle power storage device, which is a power storage device of a vehicle, in a predetermined supply area supplied with power from a power system, and supplies power to a power load in the supply area, comprising: an acquisition unit that acquires charge-side power amount information indicating the magnitude of the amount of power including the amount of charging power from the charge / discharge system to the vehicle power storage device in a plurality of predetermined periods, and discharge-side power amount information indicating the magnitude of the amount of power including the amount of discharging power from the vehicle power storage device to the charge / discharge system; a generation unit that generates display data for causing a display device to display a calendar screen in which the charge-side power amount information and the discharge-side power amount information are displayed for each of the predetermined periods in a calendar in which the plurality of predetermined periods are arranged; a transmission unit that transmits the display data to the display device; A charge / discharge system comprising the above.

2. The generation unit generates the display data for causing the display device to display the calendar screen in which a charge-side power amount figure, which is a figure indicating the magnitude of the amount of power indicated by the charge-side power amount information, is displayed as the charge-side power amount information, and a discharge-side power amount figure, which is a figure indicating the magnitude of the amount of power indicated by the discharge-side power amount information, is displayed as the discharge-side power amount information. The charge / discharge system according to Claim 1.

3. The generation unit generates the display data for causing the display device to display the calendar screen in which a numerical value indicating the magnitude of the amount of power indicated by the charge-side power amount information is further displayed at a position corresponding to the charge-side power amount figure as the charge-side power amount information, and a numerical value indicating the magnitude of the amount of power indicated by the discharge-side power amount information is further displayed at a position corresponding to the discharge-side power amount figure as the discharge-side power amount information. The charge / discharge system according to Claim 2.

4. The generation unit generates the display data for causing the display device to display the calendar screen in which the charge-side power amount information and the discharge-side power amount information are displayed in the same positional relationship for each of the predetermined periods. The charge / discharge system according to any one of Claims 1 to 3.

5. At least one of a power generation device and a power storage device is connected to the charge / discharge system, and the acquisition unit As the charging-side power amount information, vehicle charging power amount information indicating the magnitude of the charging power amount of the vehicle power storage device and first power amount information indicating the magnitude of at least one of the charging power amount of the power storage device and the power consumption amount of the power load are acquired. As the discharging-side power amount information, vehicle discharging power amount information indicating the magnitude of the discharging power amount of the vehicle power storage device and second power amount information indicating the magnitude of at least one of the power generation amount of the power generation device and the discharging power amount of the power storage device are acquired. The generation unit generates the display data for causing the display device to display the calendar screen on which the vehicle charging power amount information and the first power amount information are displayed as the charging-side power amount information, and the vehicle discharging power amount information and the second power amount information are displayed as the discharging-side power amount information. The charge-discharge system according to any one of claims 1 to 4.

6. The generation unit generates the display data for causing the display device to display the calendar screen on which the first power amount information is displayed closer to the vehicle charging power amount information than the vehicle discharging power amount information, and the second power amount information is displayed closer to the vehicle discharging power amount information than the vehicle charging power amount information. The charge-discharge system according to claim 5.

7. The generation unit generates the display data for causing the display device to display the calendar screen on which a figure indicating the magnitude of the power amount indicated by the vehicle charging power amount information and a figure indicating the magnitude of the power amount indicated by the first power amount information are displayed side by side as the charging-side power amount information, and a figure indicating the magnitude of the power amount indicated by the vehicle discharging power amount information and a figure indicating the magnitude of the power amount indicated by the second power amount information are displayed side by side as the discharging-side power amount information. The charge-discharge system according to claim 5 or 6.

8. The generation unit generates the display data for causing the display device to display the calendar screen on which charging-side power amount display information for displaying the charging-side power amount information and discharging-side power amount display information for displaying the discharging-side power amount information are further displayed. The acquisition unit is configured to be able to acquire information indicating that at least one of the charging-side power amount display information and the discharging-side power amount display information displayed on the display device is selected. The generation unit When the acquisition unit does not acquire information indicating that the charging-side power amount display information has been selected, display data for causing the display device to display the calendar screen on which the charging-side power amount information is not displayed is generated. When the acquisition unit does not acquire information indicating that the discharging-side power amount display information has been selected, display data for causing the display device to display the calendar screen on which the discharging-side power amount information is not displayed is generated. The charge / discharge system according to any one of claims 1 to 7.

9. A control method for a charge / discharge system that performs charge / discharge with a vehicle power storage device, which is a power storage device of a vehicle, and supplies power to a power load in a predetermined supply area where power is supplied from a power system. Acquire charging-side power amount information indicating the magnitude of the power amount including the charging power amount from the charge / discharge system to the vehicle power storage device and discharging-side power amount information indicating the magnitude of the power amount including the discharging power amount from the vehicle power storage device to the charge / discharge system in a plurality of predetermined periods. Generate display data for causing a display device to display a calendar screen on which the charging-side power amount information and the discharging-side power amount information are displayed for each of the predetermined periods in a calendar in which a plurality of the predetermined periods are arranged. Transmit the display data to the display device. A control method for a charge / discharge system.

10. A program for causing a computer to execute the processes included in the control method of the charge / discharge system according to claim 9.

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