Charge / discharge system, and method for controlling charge / discharge system

Abstract

To provide a charge / discharge system capable of easily grasping power exchanges.SOLUTION: A charge / discharge system 10 includes: an acquisition part 161 for acquiring charge side power amount information 165 showing the magnitude of a power amount including a charging power amount from the charge / discharge system 10 to a vehicle power storage device 51, and discharge side power amount information 166 showing the magnitude of a power amount including a discharging power amount from the vehicle power storage device 51 to the charge / discharge system 10; a generation part 162 for generating display data 164m for displaying a calendar picture displaying the charge side power amount information 165 and the discharge side power amount information 166 for each prescribed period in a calendar with a plurality of prescribed periods arranged in a display device 41, and a transmission part 163 for transmitting the display data 164m to the display device 41.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a charge / discharge system that charges and discharges between a vehicle power storage device, which is a power storage device provided in a vehicle, and a control method for the charge / discharge system. [Background technology]

[0002] Patent Document 1 discloses a grid-connected system (charging and discharging system) that receives power from a power grid, charges and discharges the power between the grid and a battery (vehicle power storage device) mounted on an electric vehicle, and supplies the power to an electric load. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-10442 Summary of the Invention [Problem to be solved by the invention]

[0004] In a conventional charging / discharging system such as that disclosed in Patent Document 1, power is exchanged between the power grid, the vehicle power storage device, and the power load, and it can be difficult to grasp the power exchange. Therefore, it is desirable to be able to easily grasp the power exchange in the charging / discharging system.

[0005] An object of the present invention is to provide a charge / discharge system that allows easy understanding of power exchange, and a control method for the charge / discharge system. [Means for solving the problem]

[0006] A charging / discharging system according to one aspect of the present invention is a charging / discharging system that charges and discharges between a vehicle power storage device, which is a power storage device possessed by a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to an electric power load within the supply area, and includes: an acquisition unit that acquires charging side power amount information indicating the magnitude of the amount of power including the amount of power charged from the charging / discharging system to the vehicle power storage device, and discharging side power amount information indicating the magnitude of the amount of power including the amount of power discharged from the vehicle power storage device to the charging / discharging system, over a plurality of predetermined periods; a generation unit that generates display data for displaying on a display device a calendar screen in which the charging side power amount information and the discharging side power amount information are displayed for each predetermined period in a calendar in which the plurality of predetermined periods are lined up; 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 a charge / discharge system. The present invention can also be realized as a program for causing a computer to execute the processes included in the control method for a charge / discharge system, and 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 having a processing unit included in the charge / discharge system. [Effects of the Invention]

[0008] According to the charge / discharge system etc. of the present invention, the exchange of power can be easily grasped. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing an overview of a remote monitoring system including a charge / discharge system according to an embodiment; [Figure 2] 1 is a perspective view showing a configuration of a charge / discharge system according to an embodiment. [Figure 3] 1 is a block diagram showing a functional configuration of a charge / discharge system according to an embodiment; [Figure 4] FIG. 2 is a block diagram showing a functional configuration of a first communication unit according to the embodiment. [Figure 5] FIG. 4 is a diagram illustrating an example of display data displayed on the display device according to the embodiment. [Figure 6] 3 is a flowchart showing a process (a control method for the charge / discharge system) performed by the charge / discharge system according to the embodiment. [Figure 7] 10 is a flowchart illustrating a process in which a generating unit of a first communication unit generates display data according to the embodiment. [Figure 8] 10 is a flowchart illustrating a process in which a generating unit of a first communication unit generates display data according to the embodiment. [Figure 9] 10 is a flowchart illustrating a selection information acquisition process performed by a generation unit according to an embodiment. [Figure 10] 10A and 10B are diagrams illustrating an example of display data generated by a generation unit according to an embodiment by performing a selection information acquisition process. [Figure 11] 10A and 10B are diagrams illustrating an example of display data generated by a generation unit according to an embodiment by performing a selection information acquisition process. DETAILED DESCRIPTION OF THE INVENTION

[0010] A charging / discharging system according to one aspect of the present invention is a charging / discharging system that charges and discharges between a vehicle power storage device, which is a power storage device possessed by a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to an electric power load within the supply area, and includes: an acquisition unit that acquires charging side power amount information indicating the magnitude of the amount of power including the amount of power charged from the charging / discharging system to the vehicle power storage device, and discharging side power amount information indicating the magnitude of the amount of power including the amount of power discharged from the vehicle power storage device to the charging / discharging system, over a plurality of predetermined periods; a generation unit that generates display data for displaying on a display device a calendar screen in which the charging side power amount information and the discharging side power amount information are displayed for each predetermined period in a calendar in which the plurality of predetermined periods are lined up; and a transmission unit that transmits the display data to the display device.

[0011] According to this, the charging / discharging system generates display data for displaying on the display device a calendar screen showing charge-side power amount information and discharge-side power amount information for each predetermined period in a calendar in which multiple predetermined periods are arranged, and transmits the display data to the display device. In other words, the charging / discharging system transmits display data for a calendar screen showing, for each predetermined period on the calendar, information indicating the magnitude of the amount of power, including the amount of charging / discharging power between the charging / discharging system and the vehicle power storage device. If information indicating the magnitude of the amount of power can be displayed for each predetermined period on the calendar, it is easy to intuitively understand the status of the amount of power. Therefore, the exchange of power (amount of power) between the charging / discharging system and the vehicle power storage device, etc. in the charging / discharging system can be displayed on the screen of the display device as a calendar, making it easy to understand the exchange of power in the charging / discharging system.

[0012] The generation unit may generate the display data for displaying on the display device the calendar screen on which a charging side energy figure, which is a figure indicating the magnitude of the energy indicated by the charging side energy information, is displayed as the charging side energy information, and a discharging side energy figure, which is a figure indicating the magnitude of the energy indicated by the discharging side energy information, is displayed as the discharging side energy information.

[0013] According to this, the charging / discharging system generates display data for causing a display device to display a calendar screen showing a charging-side power amount diagram and a discharging-side power amount diagram. In other words, the charging / discharging system generates display data for causing a display device to display a calendar screen showing a diagram indicating the magnitude of the amount of power, including the amount of power charged and discharged between the charging / discharging system and the vehicle power storage device. If a diagram indicating the magnitude of the amount of power can be displayed for each predetermined period on the calendar, it is easy to intuitively grasp the status of the amount of power. Therefore, the exchange of power (amount of power) between the vehicle power storage device, etc. in the charging / discharging system can be displayed graphically on the screen of the display device as a calendar, making it easy to grasp the exchange of power in the charging / discharging system.

[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 electric energy information, a numerical value indicating the magnitude of the electric energy indicated by the charging side electric energy information is further displayed at a position corresponding to the charging side electric energy figure, and, as the discharging side electric energy information, a numerical value indicating the magnitude of the electric energy indicated by the discharging side electric energy information is further displayed at a position corresponding to the discharging side electric energy figure.

[0015] According to this, the charging / discharging system generates display data for causing the display device to display a calendar screen in which numerical values ​​indicating the magnitude of the electric energy of the charging-side electric energy information and the discharging-side electric energy information are further displayed at positions corresponding to the charging-side electric energy figure and the discharging-side electric energy figure. In other words, the charging / discharging system generates display data for a calendar screen in which numerical values ​​indicating the magnitude of the electric energy, including the amount of electric energy charged / discharged to / from the vehicle power storage device, are further displayed at positions corresponding to the figure indicating the magnitude of the electric energy. Displaying the numerical values ​​of the electric energy at positions corresponding to the electric energy figure makes it easy to intuitively grasp the status of the electric energy. Therefore, the exchange of electric power (electric energy) between the vehicle power storage device, etc. in the charging / discharging system can be displayed as a calendar using graphics and numerical values ​​on the screen of the display device, making it easy to grasp the exchange of electric power in the charging / discharging system.

[0016] The generation unit may generate the display data for displaying on the display device the calendar screen in which the charging side electric energy information and the discharging side electric energy information are displayed in the same positional relationship for each of the predetermined periods.

[0017] According to this, the charging / discharging 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 charging power between the vehicle power storage device and the charging / discharging system, and information on the amount of power, including the amount of discharging power, are displayed so that they are in the same positional relationship for each predetermined period. If information on the amount of power, including the amount of charging power (charging-side power amount information), and information on the amount of power, including the amount of discharging power (discharging-side power amount information), are displayed in the same positional relationship for each predetermined period, it is easy to intuitively understand the status of the power amounts (which is excessive, whether it is balanced, etc.). Therefore, the exchange of power (amount of power) between the vehicle power storage device and the like in the charging / discharging system can be displayed in the same positional relationship on the screen of the display device as a calendar, making it easy to understand the exchange of power in the charging / discharging system.

[0018] At least one of a power generation device and a power storage device is connected to the charging / discharging system, and the acquisition unit acquires, 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 the power amount of at least one of the charging power amount of the power storage device and the power consumption amount of the power load, and acquires, 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 the power amount of at least one of the power generation power amount of the power generation device and the discharged power amount of the power storage device, and the generation unit may generate the display data for displaying, on the display device, 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.

[0019] According to this, the charging / discharging system generates display data for a calendar screen in which vehicle charging energy information and first energy information are displayed as charging-side energy information, and vehicle discharging energy information and second energy information are displayed as discharging-side energy information. In other words, when at least one of a power generation device and a power storage device is connected to the charging / discharging system, the charging-side energy information includes information indicating the amount of charging energy of the vehicle energy storage device and information indicating the amount of charging energy of the energy storage device and / or the amount of power consumed by an electric load. The discharging-side energy information includes information indicating the amount of discharging energy of the vehicle energy storage device and information indicating the amount of power generated by the power generation device and / or the amount of power discharged from the energy storage device. This allows the display device to display a calendar of the exchange of power (energy) between the charging / discharging system and at least one of the power generation device and the power storage device on the screen. This makes it easy to understand the exchange of power in the charging / discharging system.

[0020] The generation unit may generate the display data for displaying on the display device the calendar screen in which the first electric energy information is displayed closer to the vehicle charging electric energy information than the vehicle discharging electric energy information, and the second electric energy information is displayed closer to the vehicle discharging electric energy information than the vehicle charging electric energy information.

[0021] According to this, the charging / discharging system generates display data for displaying on a display device a calendar screen in which the first power amount information is displayed near the vehicle charging power amount information and the second power amount information is displayed near the vehicle discharging power amount information. By displaying the vehicle charging power amount information and the first power amount information near each other as the charging-side power amount information and the vehicle discharging power amount information and the second power amount information near each other as the discharging-side power amount information, it is easy to intuitively grasp the status of the power amounts. Therefore, the exchange of power (power amount) in the charging / discharging system can be displayed on the screen of the display device in a calendar format collectively for each charging-side power amount information and each discharging-side power amount information, making it easy to grasp the exchange of power in the charging / discharging system.

[0022] The generation unit may generate the display data for displaying on the display device the calendar screen in which, as the charging side electric energy information, a graphic indicating the magnitude of the electric energy indicated by the vehicle charging electric energy information and a graphic indicating the magnitude of the electric energy indicated by the first electric energy information are displayed side by side, and, as the discharging side electric energy information, a graphic indicating the magnitude of the electric energy indicated by the vehicle discharging electric energy information and a graphic indicating the magnitude of the electric energy indicated by the second electric energy information are displayed side by side.

[0023] According to this, the charging / discharging system generates display data for a calendar screen in which graphics indicating the magnitude of the electric energy of the vehicle charging energy information and the first energy information are arranged, and graphics indicating the magnitude of the electric energy of the vehicle discharging energy information and the second energy information are arranged. That is, as graphics indicating the magnitude of the electric energy of the charging-side energy information, a graphic indicating the magnitude of the charging energy of the vehicle power storage device and a graphic indicating the magnitude of at least one of the charging energy of the energy storage device and the power consumption of the power load are arranged. As graphics indicating the magnitude of the electric energy of the discharging-side energy information, a graphic indicating the magnitude of the discharge energy of the vehicle power storage device and a graphic indicating the magnitude of at least one of the generated energy of the power generation device and the discharge energy of the energy storage device are arranged. This makes it easy to intuitively grasp and compare the magnitude of the electric energy of the charging-side energy information and the magnitude of the electric energy of the discharging-side energy information (e.g., which is excessive or balanced). Therefore, the exchange of electric power (electric energy) in the charging / discharging system can be displayed on the screen of the display device in a calendar format in an easy-to-understand manner, making it easy to grasp the exchange of electric power in the charging / discharging system.

[0024] The generation unit generates the display data for causing the display device to display the calendar screen, which further displays charging side electric energy display information for displaying the charging side electric energy information and discharging side electric energy display information for displaying the discharging side electric energy information, and the acquisition unit is configured to be able to acquire information indicating that at least one of the charging side electric energy display information and the discharging side electric energy display information displayed on the display device has been selected. If the acquisition unit does not acquire information indicating that the charging side electric energy display information has been selected, the generation unit may generate the display data for causing the display device to display the calendar screen on which the charging side electric energy information is not displayed, and if the acquisition unit does not acquire information indicating that the discharging side electric energy display information has been selected, the generation unit may generate the display data for causing the display device to display the calendar screen on which the discharging side electric energy information is not displayed.

[0025] According to this, if the charging / discharging system does not acquire information indicating that the charging-side power amount display information or the discharging-side power amount display information has been selected, it generates display data for a calendar screen in which the charging-side power amount information or the discharging-side power amount information is not displayed. As a result, the information that was not selected from the charging-side power amount information and the discharging-side power amount information is not displayed on the calendar screen, so that the desired information can be selectively displayed, making it easy to intuitively understand the power amount situation. Therefore, the exchange of power (power amount) in the charging / discharging system can be displayed on the display device screen in a calendar format, focusing on the desired information, making it easy to understand the exchange of power in the charging / discharging system.

[0026] Hereinafter, with reference to the drawings, a charge / discharge system according to an embodiment of the present invention (including its modified examples), and a control method for the charge / discharge system will be described. The embodiments described below all show comprehensive or specific examples. The numerical values, components, the arrangement and connection of the components, the control processes, and the order of the control processes shown in the following embodiments are examples and are not intended to limit the present invention. Each drawing is a schematic diagram and is not necessarily an exact illustration. In each drawing, the same or similar components are assigned the same reference numerals.

[0027] (Embodiment) [1 Explanation of charging and discharging system 10] First, a general description will be given of the charge / discharge system 10. Fig. 1 is a diagram showing an outline of a remote monitoring system including a charge / discharge system 10 according to the present embodiment.

[0028] 1, the remote monitoring system includes a plurality of supply areas 1 (three in FIG. 1), a server device 30 capable of collecting information about the supply areas 1, a client device 40 capable of viewing the information about the supply areas 1, and a network N serving as a communication medium. This allows remote monitoring by displaying the information about the supply areas 1 on a display device 41 of the client device 40 via the network N (and the server device 30).

[0029] A supply area 1 is a predetermined site to which power is supplied from a power grid, and is divided into predetermined areas such as by consumer, facility, or building. In each supply area 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 buildings (offices, etc.) arranged in each supply area 1, or outdoor power consuming devices, etc.

[0030] The server device 30 includes a web server function and presents information obtained from the charging / discharging 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 the 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 from the base station BS via the network N. An access point AP is connected to the public communication network N1, and the client device 40 can communicate with the server device 30 from the access point AP via the network N.

[0032] The client device 40 may be a desktop or laptop personal computer, or may be a so-called smartphone or tablet 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 mouse or a touch panel, a control device, a storage unit (memory), a communication device, etc. The storage unit stores client programs including a web browser that are read and executed by the control device. A user who logs in using a login screen displayed on the web browser of the client device 40 can access information about the system in which the user is involved, which is provided by the server device 30.

[0033] Next, the charging / discharging system 10 will be described in detail. Fig. 2 is a perspective view showing the configuration of the charging / discharging system 10 according to this embodiment. Specifically, Fig. 2 is an image diagram showing the configurations of the power conditioner 100 and the charger / discharger 200 provided in the charging / discharging system 10, and a state in which the vehicle power storage device 51 of the vehicle 50 is connected to the charger / discharger 200. Fig. 3 is a block diagram showing the functional configuration of the charging / discharging system 10 according to this embodiment. Specifically, Fig. 3 shows a configuration in which the charging / discharging system 10 is connected to the vehicle power storage device 51 of the vehicle 50, the power grid 60, the power generation device 70, the power storage device 80, and the power load 20 within the supply area 1.

[0034] The charging / discharging system 10 is a system that charges / discharges power between a vehicle power storage device 51, which is a power storage device included in a vehicle 50, in a predetermined supply area 1 to which power is supplied from a power grid 60, and supplies the power to a power load 20 within the supply area 1. As shown in FIGS. 2 and 3, the charging / discharging system 10 includes a power conditioner 100 and a charger / discharger 200. Although five charger / dischargers 200 are illustrated in FIG. 2 and only one charger / discharger 200 is illustrated in FIG. 3 for ease of explanation, the number of charger / dischargers 200 included in the charging / discharging system 10 is not particularly limited. The number of power conditioners 100 included in the charging / discharging system 10 is also not particularly limited.

[0035] That is, the charging / discharging system 10 may be arranged in a centralized charging / discharging station in which parking spaces S1 to S5 are adjacent to each other, as shown in FIG. 2, or in a distributed charging / discharging station (not shown) in which parking spaces are distributed (for example, on different floors of a building). In FIG. 2, a charger / discharger 200 is arranged in each of the parking spaces (S1, S2, ...), but this is not limited to this configuration, and a single charger / discharger 200 may be installed in a single parking space. Multiple vehicles 50 (multiple vehicle power storage devices 51) may be connected to one charger / discharger 200. In other words, multiple vehicles 50 (multiple vehicle power storage devices 51) may be connected to the charging / discharging system 10, or only one vehicle 50 (one vehicle power storage device 51) may be connected. The charging / discharging station in which the charging / discharging system 10 is arranged may be provided in a public place such as a public parking lot, or may be provided on the premises of a company or individual.

[0036] 3, the power conditioner 100 is connected to the charger / discharger 200, the power system 60, the power generator 70, the power storage device 80, and the power load 20, and exchanges power with these. That is, the power conditioner 100 receives power from the charger / discharger 200, the power system 60, the power generator 70, and the power storage device 80, and supplies power to the charger / discharger 200, the power system 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 an electric power company, and AC power generated by a system power source 61 such as a thermal power plant flows through it. The power grid 60 supplies the AC power to the power conditioner 100. The power generation device 70 is a power generation device installed within the supply area 1, and may be a solar power generation facility, a wind power generation facility, a diesel generator, a small gas turbine generator, a fuel cell, a micro-hydroelectric generator, a distributed power generation facility such as a binary power generation facility, or the like. 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 with electricity from an external source and discharge electricity to the outside. The power storage device 80 charges with 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 parallel. The power storage elements are secondary batteries (single cells) that can charge with and discharge electricity, and are, for example, non-aqueous electrolyte secondary batteries such as lithium-ion secondary batteries. The power storage elements are not limited to non-aqueous electrolyte secondary batteries, and may be secondary batteries other than non-aqueous electrolyte secondary batteries, capacitors, primary batteries, batteries using a solid electrolyte, or the like.

[0039] The power load 20 is a power load consumed within the supply area 1, and includes specific loads 21 and 22 that are used even in emergencies such as power outages, and a general load 23 that is used normally. The specific load 21 is a power load used for elevators or commercial air conditioning in facilities such as offices, and the specific load 22 is a lighting load used for lighting or outlets in facilities such as offices. The general load 23 is a power load other than the specific loads 21 and 22, such as a load for operating home appliances or machinery in a factory.

[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 and DC power, and is connected to the power generation device 70 to boost and output 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 and DC power, and is connected to the power storage device 80 to discharge and charge the power storage device 80. 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 amount of power generated by the power generation device 70 is insufficient, the power storage device 80 can discharge and make up for the shortage of power generation via the second converter circuit 120. The bidirectional inverter circuit 130 is a bidirectional conversion circuit that selectively performs inverse conversion (inversion) to convert DC power to AC power and forward conversion (conversion) to convert AC power to 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 is connected to a three-phase specific load 21 and a single-phase specific load 22 via a transformer, and is a circuit that switches contacts to supply power to the specific loads 21 and 22 in an emergency such as a power outage in the power grid 60. The switching circuit 140 is configured to normally connect contact A to the power line so that power from the power grid 60 can be supplied to the specific loads 21 and 22, etc. In an emergency, the switching circuit 140 switches to contact B so that power can be supplied from the power generation device 70 and / or the power storage device 80 to the specific loads 21 and 22 via the bidirectional inverter circuit 130. As a result, 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 charger / discharger 200 in the event of 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-hole sensor that 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 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 received power from the received current and system voltage detected by an external measuring device (external transducer) 62 installed at the power receiving point of the power grid 60, or acquiring the received power calculated by the external measuring device 62. In this way, the control unit 150 is configured to be able to acquire the power and amount of power of the current flowing between the charging / discharging system 10 and the power grid 60, the power generation device 70, the power storage device 80, and the power load 20. The control unit 150 controls the SOC (State Of Charge) of the power storage device 80 and the charging / discharging of the power storage device 80 with the power conditioner 100. The power and amount of power of the current flowing between the power supply 200 and the power supply 200 may also be acquired.

[0044] The first communication unit 160 is a communication board such as a network interface card (NIC) and is capable of communicating 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 communicably connected to a second communication unit 230 of the charger / discharger 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). The first communication unit 160 will be described in detail later.

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

[0046] Charger / discharger 200 is a charging / discharging station that is connected to vehicle power storage device 51, which is a power storage device included in vehicle 50, and charges / discharges between vehicle power storage device 51 and charge / discharge station 200. Charger / discharger 200 is also connected to power load 20 via power conditioner 100, and charges vehicle power storage device 51 under normal circumstances, and discharges vehicle power storage device 51 under emergency circumstances to supply power to power load 20, such as specific loads 21 and 22.

[0047] Vehicle 50 is a vehicle (mobile object) such as an electric vehicle (EV) or a plug-in hybrid electric vehicle (PHEV), and vehicle power storage device 51 is a battery mounted thereon. Similar to power storage device 80, vehicle power storage device 51 has a plurality of power storage elements (lithium ion secondary batteries, etc.) connected in series and / or 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 (conversion) to convert AC power to DC power and inverse conversion (inversion) to convert DC power to AC power. The charge / discharge unit 210 converts 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 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 issuing commands to the charge / discharge unit 210. The control unit 220 has a function of calculating (estimating) and acquiring the power and amount of power when the vehicle power storage device 51 is being charged and when it is being discharged, based on the output of the charge / discharge unit 210. The control unit 220 may also have a function of acquiring 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, etc.

[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, information on the power and 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. In this way, in the present embodiment, the first communication unit 160 functions as a parent device, and the second communication unit 230 functions as a child device.

[0052] 2 , when a plurality of chargers / dischargers 200 are provided in the charging / discharging system 10, a plurality of second communication units 230 possessed by the plurality of chargers / dischargers 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 possessed by other chargers / dischargers 200 via wire or wirelessly, and may be configured to acquire information from the other second communication units 230 and then transmit the information to the first communication unit 160.

[0053] [2. Description 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 this 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 this embodiment. In Fig. 5, a monitor of a personal computer is shown as an example of the display device 41, but a touch panel of a smartphone or a tablet-type communication terminal may also be used.

[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 charging-side energy information 165 (see FIG. 5) and discharging-side energy information 166 (see FIG. 5) for a plurality of predetermined periods. The predetermined period is a predetermined period such as one hour, half a day, one day, one week, or one month. The plurality of predetermined periods is a day consisting of 24 one-hour periods, a half-month consisting of a plurality of half-days such as 30 periods, a month consisting of a plurality of one-day periods such as 30 periods, a month consisting of a plurality of one-week periods such as 4 periods, or a year consisting of 12 one-month periods. In this embodiment, the plurality of predetermined periods is a month consisting of a plurality of one-day periods, and the acquisition unit 161 acquires various information such as charging-side energy information 165 and discharging-side energy information 166 for each day of the month (see FIG. 5).

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

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

[0058] The acquisition unit 161 acquires vehicle charging energy information 164a, vehicle discharging energy information 164b, and the like from the second communication unit 230 of the charger / discharger 200. The acquisition unit 161 acquires first energy information 164c (164c1 and 164c2), second energy information 164d (164d1 and 164d2), and the like from the control unit 150 of the power conditioner 100. The acquisition unit 161 writes and stores the acquired various information, such as the vehicle charging energy information 164a, vehicle discharging energy information 164b, first energy information 164c (164c1 and 164c2), and second energy 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 charging side power amount display information 167 (see Figure 5) and the discharging side power amount display information 168 (see Figure 5) displayed on the display device 41 has been selected.

[0060] Charging-side energy display information 167 is information for displaying charging-side energy information 165 on display device 41, and includes vehicle charging energy display information 164i and first energy display information 164k, as shown in Fig. 5. Vehicle charging energy display information 164i is information for displaying vehicle charging energy information 164a (information indicating the amount of energy charged to vehicle power storage device 51) on display device 41. First energy display information 164k is information for displaying first energy information 164c (information indicating the amount of energy of at least one of the amount of energy charged to power storage device 80 and the amount of energy consumed by power load 20) on display device 41. In the present embodiment, first energy display information 164k includes first energy display information 164k1 for displaying first energy information 164c1 and first energy display information 164k2 for displaying first energy information 164c2.

[0061] The vehicle charging energy display information 164i and the first energy display information 164k (164k1 and 164k2) are displayed on the display device 41 using distinctive characters, symbols, figures, or the like (figures and characters in FIG. 5). The vehicle charging energy display information 164i is displayed using the same pattern (hatching) or figures in the same color as the vehicle charging energy information 164a, and the text "EV charging amount." The first energy display information 164k1 is displayed using the same pattern (hatching) or figures in the same color as the first energy information 164c1, and the text "LOAD CONSUMPTION." The first energy display information 164k2 is displayed using the same pattern (hatching) or figures in the same color as the first energy information 164c2, and the text "ESS CHARGE AMOUNTS."

[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, and includes vehicle discharge power amount display information 164j and second power amount display information 164l, as shown in Fig. 5. The vehicle discharge power amount display information 164j is information for displaying vehicle discharge power amount information 164b (information indicating the magnitude of the amount of discharge power of the vehicle power storage device 51) on the display device 41. The second power amount display information 164l is information for displaying second power amount information 164d (information indicating the magnitude of at least one of the amount of power generated by the power generation device 70 and the amount of discharge power 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 second power amount information 164d1 and second power amount display information 164l2 for displaying second power amount information 164d2.

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

[0064] The selection information 41a is information indicating that at least one of the vehicle charging energy display information 164i, the first energy display information 164k (164k1 and 164k2), the vehicle discharging energy display information 164j, and the second energy display information 164l (164l1 and 164l2) displayed on the display device 41 has been selected. When the user selects (e.g., 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 piece of information has been 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 displaying a screen including various information on the display device 41 of the client device 40, as shown in Fig. 5. Specifically, the generation unit 162 generates display data 164m for displaying on the display device 41 a calendar screen in which charging-side power energy information 165 and discharging-side power energy information 166 are displayed for each predetermined period in a calendar in which a plurality of predetermined periods are arranged. As described above, in this embodiment, the predetermined period is one day, and the plurality of predetermined periods is one month consisting of a plurality of one-day periods. Therefore, the above calendar is displayed in which one month of any month (March in Fig. 5) is divided into one day and arranged by week (Sunday to Saturday).

[0066] Specifically, the generation unit 162 generates display data 164m for displaying on the display device 41 a calendar screen on which a charging-side energy graphic 165a is displayed as the charging-side energy information 165 and a discharging-side energy graphic 166a is displayed as the discharging-side energy information 166. The charging-side energy graphic 165a is a graphic that shows the magnitude of the energy (value of the energy) shown in the charging-side energy information 165. In FIG. 5, the charging-side energy graphic 165a is shown as a rectangular bar graph whose height corresponds to the magnitude (numeric value) of the energy of the charging-side energy information 165. The discharging-side energy graphic 166a is a graphic that shows the magnitude of the energy (value of the energy) shown in the discharging-side energy information 166. In FIG. 5, the discharging-side energy graphic 166a is shown as a rectangular bar graph whose height corresponds to the magnitude (numeric value) of the energy of the discharging-side energy information 166.

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

[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 energy information 164a and the first energy information 164c (164c1 and 164c2) are displayed as the charging-side energy 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 energy information 164c (164c1 and 164c2) is displayed closer to the vehicle charging energy information 164a than the vehicle discharging energy 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 the vehicle charging energy figure 164e and the first energy figure 164g (164g1 and 164g2) are displayed side by side as the charging-side energy information 165. The vehicle charging energy graphic 164e is a graphic that shows the magnitude of the energy (value of the energy) indicated in the vehicle charging energy information 164a. The first energy graphic 164g (164g1 and 164g2) is a graphic that shows the magnitude of the energy (value of the energy) indicated in the first energy information 164c (164c1 and 164c2). In Fig. 5, the vehicle charging energy graphic 164e and the first energy graphic 164g (164g1 and 164g2) are shown as rectangular bar graphs whose height corresponds to the magnitude (numeric value) of the energy, 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 the vehicle discharge energy information 164b and the second energy information 164d (164d1 and 164d2) are displayed as the discharge energy 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 energy information 164d (164d1 and 164d2) is displayed closer to the vehicle discharge energy information 164b than to the vehicle charging energy 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 the vehicle discharge energy graphic 164f and the second energy graphic 164h (164h1 and 164h2) are displayed side by side as the discharge energy information 166. The vehicle discharge energy graphic 164f is a graphic that shows the magnitude of the energy (value of the energy) indicated by the vehicle discharge energy information 164b. The second energy graphic 164h (164h1 and 164h2) is a graphic that shows the magnitude of the energy (value of the energy) indicated by the second energy information 164d (164d1 and 164d2). In FIG. 5, the vehicle discharge energy graphic 164f and the second energy graphic 164h (164h1 and 164h2) are shown as rectangular bar graphs whose height corresponds to the magnitude (numeric value) of the energy, and are stacked vertically.

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

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

[0072] The generation unit 162 generates display data 164m for causing the display device 41 to display a calendar screen further displaying charging side power amount display information 167 for displaying charging side power amount information 165 and discharging side power amount display information 168 for displaying discharging side power amount information 166. If the acquisition unit 161 does not acquire selection information 41a indicating that the charging 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 that does not display the charging side power amount information 165. If the acquisition unit 161 does not acquire selection information 41a indicating that the discharging 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 that does not display the discharging side power amount information 166.

[0073] The process by which the generation unit 162 generates the display data 164m will be described in detail later. Various pieces of information required 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. The information may be stored in the storage unit 164 in advance, or 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 into 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 from the storage unit 164, and transmits the display data 164m to the client device 40 (display device 41). As a result, the display data 164m is displayed on the display device 41 of the client device 40, as shown in FIG.

[0075] The storage unit 164 is a memory that stores data acquired by the acquisition unit 161, data necessary for the generation unit 162 to generate the display data 164m, and the display data 164m generated by the generation unit 162. The storage unit 164 stores vehicle charging energy information 164a, vehicle discharging energy information 164b, first energy information 164c, second energy information 164d, a vehicle charging energy figure 164e, a vehicle discharging energy figure 164f, a first energy figure 164g, a second energy figure 164h, vehicle charging energy display information 164i, vehicle discharging energy display information 164j, first energy amount display information 164k, second energy amount display information 164l, and display data 164m. The storage unit 164 may also store data other than those described above, such as data generated by the generation unit 162 while the display data 164m is being generated. In the storage unit 164, when any change occurs to these data, these data are updated each time, but these data may also be accumulated.

[0076] [3. Explanation of the processing flow of the charging / discharging system 10] Next, the process performed by the charge / discharge system 10 (the control method for the charge / discharge system 10) will be described. Fig. 6 is a flowchart showing the process performed by the charge / discharge system 10 according to this embodiment (the control method for the charge / discharge system). Fig. 6 shows the process performed by each processing unit of the first communication unit 160 included in the power conditioner 100 of the charge / discharge system 10.

[0077] 6, first, the acquisition unit 161 acquires various information such as charging-side power amount information 165 and discharging-side power amount information 166 for a plurality of predetermined periods (S102). Details of the information acquired by the acquisition unit 161 are as described above, and therefore will not be described again.

[0078] Then, the generation unit 162 generates display data 164m for displaying on the display device 41 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 (S104). A detailed description of the process by which the generation unit 162 generates the display data 164m will be given later.

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

[0080] Thereafter, when the acquisition unit 161 acquires the selection information 41a, the generation unit 162 performs a selection information acquisition process (S108). The selection information acquisition process performed by the generation unit 162 will be described in detail later.

[0081] In this manner, the process (the method for controlling the charge / discharge system) performed by the charge / discharge system 10 (the first communication unit 160) is completed.

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

[0083] The generating unit 162 generates display data 164m for displaying the following screen on the display device 41, as shown in FIG.

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

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

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

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

[0088] Then, the generation unit 162 displays the charging side energy information 165 and the discharging side energy information 166 so that they have the same positional relationship for each predetermined period (S206 in FIG. 7). That is, the generation unit 162 arranges the charging side energy information 165 so that it is located on the same side (left side) as the discharging side energy information 166 for 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 and the first power amount display information 164k (164k1 and 164k2) included in the charging side power amount display information 167 so that they are positioned 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 and the second power amount display information 164l (164l1 and 164l2) included in the discharging side power amount display information 168 so that they are positioned 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 this embodiment. Figs. 10 and 11 are diagrams showing an example of display data 164m generated by the generation unit 162 according to this embodiment performing the selection information acquisition process.

[0092] 9, the generation unit 162 determines whether the acquisition unit 161 has acquired selection information 41a indicating that the charging side energy display information 167 (vehicle charging energy display information 164i, first energy display information 164k1, or 164k2) has been selected (S402). When the user selects the charging side energy display information 167 displayed on the display device 41 of the client device 40 by clicking or touching it via the input device 42, the selection information 41a indicating that the charging side energy 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 selection information 41a indicating that the charging side energy display information 167 has been selected.

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

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

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

[0096] 10, second power amount display information 164l1 for displaying second power amount information 164d1 indicating the magnitude of the amount of power generated by the power generation device 70 is selected (a graphic with the same pattern or color as the second power amount graphic 164h1 is displayed) from among the discharge side power amount display information 168. Therefore, in FIG. 10, the generation unit 162 determines that the acquisition unit 161 has acquired selection information 41a indicating that the second power amount display information 164l1 from the discharge side power amount display information 168 has been selected. As a result, the generation unit 162 generates display data 164m for displaying on the display device 41 a calendar screen on which the second power amount information 164d1 (the second power amount graphic 164h1 and the power amount value) from the discharge side power amount information 166 is displayed.

[0097] 11, in addition to the state of FIG. 10, vehicle charging energy amount display information 164i for displaying vehicle charging energy amount information 164a indicating the magnitude of the amount of energy charged to the vehicle power storage device 51 is selected (a graphic with the same pattern or color as the vehicle charging energy amount graphic 164e is displayed) from the charging-side energy amount display information 167. Therefore, in FIG. 11, the generation unit 162 determines that the acquisition unit 161 has acquired selection information 41a indicating that the vehicle charging energy amount display information 164i from the charging-side energy amount display information 167 and the second energy amount display information 164l1 from the discharging-side energy amount display information 168 have been selected. As a result, the generation unit 162 generates display data 164m for displaying on the display device 41 a calendar screen displaying vehicle charging energy amount information 164a (vehicle charging energy amount graphic 164e and the energy value) from the charging-side energy information 165 in addition to the state of FIG. 10.

[0098] In this way, the selection information acquisition process (S108 in FIG. 6) performed by the generation unit 162 ends.

[0099] [4. Explanation of effects] As described above, the charging / discharging system 10 according to this embodiment generates display data 164m for displaying on the display device 41 a calendar screen in 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, and transmits the display data 164m to the display device 41. That is, the charging / discharging system 10 transmits to the display device 41 display data 164m for a calendar screen in which information indicating the magnitude of the amount of power, including the amount of power charged and discharged between the charging / discharging system 10 and the vehicle power storage device 51 (such as a charging / discharging history), is displayed for each predetermined period of the calendar. If information indicating the magnitude of the amount of power can be displayed for each predetermined period of the calendar, it is easy to intuitively grasp the status of the amount of power. Therefore, the exchange of power (power amount) between the charging / discharging system 10 and the vehicle power storage device 51, etc. can be displayed on the screen of the display device 41 in a calendar format, and therefore the exchange of power in the charging / discharging system 10 can be easily grasped.

[0100] The charging / discharging system 10 generates display data 164m for causing the display device 41 to display a calendar screen showing a charging-side power amount graphic 165a and a discharging-side power amount graphic 166a. In other words, the charging / discharging system 10 generates display data 164m for causing the display device 41 to display a calendar screen showing a graphic indicating the amount of power, including the amount of charging / discharging power between the charging / discharging system 10 and the vehicle power storage device 51. If a graphic indicating the amount of power can be displayed for each predetermined period on the calendar, it is easy to intuitively understand the status of the power amount. Therefore, the exchange of power (power amount) between the charging / discharging system 10 and the vehicle power storage device 51, etc. in the charging / discharging system 10 can be displayed graphically on the screen of the display device 41 as a calendar, so that the exchange of power in the charging / discharging system 10 can be easily understood.

[0101] The charging / discharging system 10 generates display data 164m for causing the display device 41 to display a calendar screen on which numerical values ​​indicating the magnitude of the electric energy of the charging-side electric energy information 165 and the discharging-side electric energy information 166 are further displayed at positions corresponding to the charging-side electric energy graphic 165a and the discharging-side electric energy graphic 166a. That is, the charging / discharging system 10 generates display data 164m for a calendar screen on which numerical values ​​indicating the magnitude of the electric energy, including the amount of electric energy charged / discharged to / from the vehicle power storage device 51, are further displayed at positions corresponding to the graphic indicating the magnitude of the electric energy. Displaying the numerical values ​​of the electric energy at positions corresponding to the graphic of the electric energy makes it easy to intuitively grasp the status of the electric energy. Therefore, the exchange of electric power (electric energy) between the vehicle power storage device 51 and the like in the charging / discharging system 10 can be displayed graphically and numerically on the screen of the display device 41 in a calendar format, making it easy to grasp the exchange of electric power in the charging / discharging system 10.

[0102] The charging / discharging system 10 generates display data 164m for displaying on the display device 41 a calendar screen in which information on the amount of power, including the amount of charging power between the charging / discharging system 10 and the vehicle power storage device 51, and information on the amount of power, including the amount of discharging power, are displayed in the same positional relationship for each predetermined period. If the information on the amount of power, including the amount of charging power (charging-side power amount information 165), and the information on the amount of power, including the amount of discharging power (discharging-side power amount information 166), are displayed in the same positional relationship for each predetermined period, it is easy to intuitively grasp the status of the power amounts (which is excessive, whether it is balanced, etc.). Therefore, the exchange of power (amount of power) between the charging / discharging system 10 and the vehicle power storage device 51, etc. can be displayed in the same positional relationship on the screen of the display device 41 as a calendar, and the exchange of power in the charging / discharging system 10 can be easily grasped.

[0103] The charging / discharging system 10 generates display data 164m for a calendar screen in which vehicle charging energy information 164a and first energy information 164c are displayed as charging-side energy information 165, and vehicle discharging energy information 164b and second energy information 164d are displayed as discharging-side energy information 166. In other words, when at least one of the power generation device 70 and the power storage device 80 is connected to the charging / discharging system 10, information indicating the amount of energy charged to the vehicle energy storage device 51 and information indicating the amount of energy charged to the power storage device 80 and / or the amount of energy consumed by the power load 20 are set as the charging-side energy information 165. Information indicating the amount of energy discharged from the vehicle energy storage device 51 and information indicating the amount of energy generated by the power generation device 70 and / or the amount of energy discharged from the power storage device 80 are set as the discharging-side energy information 166. As a result, 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 exchange of power (amount of power) 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 exchange of power in the charge / discharge system 10 can be easily understood.

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

[0105] The charging / discharging system 10 generates display data 164m for a calendar screen in which graphics indicating the magnitude of the electric energy of the vehicle charging energy information 164a and the first energy information 164c are arranged, and graphics indicating the magnitude of the electric energy of the vehicle discharging energy information 164b and the second energy information 164d are arranged. That is, as graphics indicating the magnitude of the electric energy of the charging-side energy information 165, a graphic indicating the magnitude of the charging energy of the vehicle power storage device 51 and a graphic indicating the magnitude of at least one of the amount of charging energy of the energy storage device 80 and the amount of electricity consumed by the power load 20 are arranged. As graphics indicating the magnitude of the electric energy of the discharging-side energy information 166, a graphic indicating the magnitude of the discharged energy of the vehicle power storage device 51 and a graphic indicating the magnitude of at least one of the amount of electric energy generated by the power generation device 70 and the amount of electric energy discharged by the energy storage device 80 are arranged. This makes it easy to intuitively grasp and compare the magnitude of the electric energy of the charging-side energy information 165 and the magnitude of the electric energy of the discharging-side energy information 166 (e.g., which is excessive, whether they are balanced, etc.). Therefore, the exchange of electricity (electric energy) in the charging / discharging system 10 can be displayed in a calendar format on the screen of the display device 41 in an easy-to-understand manner, with the magnitude of the electric energy of the charging side electric energy information 165 and the discharging side electric energy information 166, so that the exchange of electricity in the charging / discharging system 10 can be easily understood.

[0106] When the charging / discharging system 10 does not acquire information indicating that the charging side power amount display information 167 or the discharging side power amount display information 168 has been selected, it generates display data 164m for a calendar screen in which the charging side power amount information 165 or the discharging side power amount information 166 is not displayed. As a result, the information that was not selected from the charging side power amount information 165 and the discharging side power amount information 166 is not displayed on the calendar screen, so that the desired information can be selectively displayed, making it easy to intuitively understand the status of the power amount. Therefore, the exchange of power (power amount) in the charging / discharging system 10 can be displayed on the screen of the display device 41 in a calendar format, focusing on the desired information, so that the exchange of power in the charging / discharging system 10 can be easily understood.

[0107] As described above, the charge / discharge system 10 can display a calendar screen on the display device 41 that is neither too difficult nor too simple, making it easy to understand the exchange of power in the charge / discharge system 10. By viewing such a calendar screen, the characteristics and trends of the date or day of the week can be intuitively understood, and the operation of the vehicle 50 (such as a business vehicle or commercial vehicle) can be improved, thereby optimizing energy management. Since the calendar display on the screen of the display device 41 can be narrowed down to the desired target, energy management can be optimized, for example, by keeping the charge level of the power storage device 80 high on the weekend to prepare for increased consumption by the power load 20 on Monday.

[0108] For public or private facilities considering introducing the charging / discharging system 10, it is undesirable for the amount of power received from the power grid 60 to increase as the system operates. Understanding the power exchange in the charging / discharging system 10 and efficiently receiving power from the power grid 60 can help curb increases in electricity bills, promoting the introduction of the charging / discharging system 10. This can also contribute to strengthening disaster prevention functions in public facilities and strengthening BCPs (business continuity plans in the event of a power outage) in private facilities.

[0109] By providing a charging and discharging system10 that makes it easy to understand the exchange of electricity, this will contribute to Goal 7 of the United Nations-led Sustainable Development Goals (SDGs), which is to "Ensure access to affordable, reliable, sustainable and modern energy for all."

[0110] [5. Explanation of Variations] Although the charging / discharging system 10 according to the present embodiment has been described above, the present invention is not limited to the above embodiment. The embodiment disclosed herein is illustrative in all respects and is not restrictive, and the scope of the present invention includes all modifications within the meaning and scope of the claims.

[0111] In the above embodiment, when a frame of a divided period (a frame of a date) is selected, the magnitude (numerical value) of the amount of power indicated by the figure displayed in the frame may be displayed in a list for each item (each figure). That is, when the acquisition unit 161 acquires information indicating that the frame is selected, the generation unit 162 generates display data 164m for displaying on the display device 41 a screen in which the magnitude (numerical value) of the amount of power indicated by the figure displayed in the frame is displayed in a list for each item. As a result, the transmission unit 163 transmits the display data 164m to the display device 41, and a screen in which the magnitude (numerical value) of the amount of power indicated by the figure displayed in the frame is displayed in a list for each item is displayed on the display device 41 of the client device 40.

[0112] In the above embodiment, the functions possessed by the first communication unit 160 may be possessed by the second communication unit 230, or may be possessed by other devices within the charging / discharging system 10, or by devices outside the charging / discharging 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 on a display device of the server device 30 or a display device possessed by an apparatus within the charging / discharging system 10 (power conditioner 100 or charger / discharger 200) instead of on the display device 41 of the client device 40.

[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 it is sufficient if at least one of the power generation device 70 and the power storage device 80 is connected. Alternatively, the charge / discharge system 10 does not necessarily have to be connected to both the power generation device 70 and the power storage device 80.

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

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

[0117] In the above embodiment, the calendar screen displayed by the display data 164m does not necessarily have to be a screen in which one month is divided into days, but may be a screen in which any period is divided into any period. The calendar screen may be a screen in which one day is divided into hours, a screen in which half a month is divided into half days, a screen in which one month is divided into weeks, or a screen in which one year is divided into months.

[0118] In the above embodiment, the charging side power energy diagram 165a and the discharging side power energy diagram 166a, as well as the diagrams contained therein, are rectangular bar graphs whose height corresponds to the magnitude (numerical value) of the amount of power, but the diagrams may be of any shape, such as a triangle or a circle.

[0119] In the above embodiment, the numerical value of the electric energy is displayed inside the figures included in the charging side electric energy figure 165a and the discharging side electric energy figure 166a, but the numerical value may be displayed outside the figure and adjacent to the figure, or in any other position.

[0120] In the above embodiment, the charging side energy information 165 is displayed as the charging side energy graphic 165a and the energy value, but either one of the charging side energy graphic 165a or the energy value does not have to be displayed. Characters or symbols different from the charging side energy graphic 165a and the energy value may be displayed as the charging side energy information 165. The same applies to the discharging side energy information 166.

[0121] In the above embodiment, the charging side power energy information 165 is arranged to the left of the discharging side power energy information 166, but it may be arranged in any position, such as to the right, above, or below the discharging side power energy information 166. The charging side power energy information 165 and the discharging side power energy information 166 do not have to be displayed in the same positional relationship.

[0122] In the above embodiment, the vehicle charging energy graphic 164e and the first energy graphic 164g (164g1 and 164g2) are displayed vertically side by side (stacked) as the charging-side energy information 165, but they may also be displayed horizontally side by side. The vehicle charging energy graphic 164e and the first energy graphic 164g may also be displayed close to each other without being side by side, or may be displayed relatively far apart. The same applies to the discharging-side energy information 166.

[0123] In the above embodiment, the order of various processes performed by the generation unit 162 may be interchanged. The processes of S202 to S208 in Fig. 7 may be interchanged as desired. The process of S302 and the process of S304 in Fig. 8 may be interchanged. The processes of S402 to S406 and the processes of S408 to S412 in Fig. 9 may be interchanged.

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

[0125] Any combination of the components in the above-described embodiments and their modifications is also included within the scope of the present invention. [Industrial Applicability]

[0126] The present invention can be applied to a charging / discharging system or the like that charges and discharges between a vehicle and an electricity storage device. [Explanation of symbols]

[0127] 1. Supply area 10 Charging and discharging system 20 Power load 30 Server device 40 Client Device 41 Display device 41a Selection Information 50 vehicles 51 Vehicle power storage device 60 Power system 70 Power Generation Equipment 80 Electricity storage device 100 Power Conditioner 160 First Communications Department 161 Acquisition Department 162 Generation part 163 Transmitter 164 Storage section 164a Vehicle charging energy information 164b Vehicle discharge energy information 164c, 164c1, 164c2 First power amount information 164d, 164d1, 164d2 Second electric energy information 164e Vehicle charging energy chart 164f Vehicle discharge energy chart 164g, 164g1, 164g2 First power consumption diagram 164h, 164h1, 164h2 Second electric energy figure 164i Vehicle charging energy amount display information 164j Vehicle discharge power amount display information 164k, 164k1, 164k2 First electric energy display information 164l, 164l1, 164l2 Second electric energy display information 164m display data 165 Charging side power amount information 165a Charging side energy chart 166 Discharge side power amount information 166a Discharge side power consumption diagram 167 Charging side power amount display information 168 Discharge side power amount display information 200 charger / discharger 230 Second Communications Department

Claims

1. A charging / discharging system that charges / discharges between a vehicle power storage device, which is a power storage device included in a vehicle, in a predetermined supply area to which power is supplied from an electric power grid, and supplies power to an electric load within the supply area, an acquisition unit that acquires charging-side power amount information indicating the magnitude of the amount of power including the amount of power charged from the charging / discharging system to the vehicle power storage device, and discharging-side power amount information indicating the magnitude of the amount of power including the amount of power discharged from the vehicle power storage device to the charging / discharging system, over a plurality of predetermined periods; a generation unit that generates display data for displaying, on a display device, a calendar screen in 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 the plurality of predetermined periods are arranged; a transmitter that transmits the display data to the display device; A charging and discharging system comprising:

2. The generation unit generates the display data for displaying on the display device the calendar screen on which a charging-side power amount figure that is a figure indicating the magnitude of the power amount indicated by the charging-side power amount information is displayed as the charging-side power amount information and a discharging-side power amount figure that is a figure indicating the magnitude of the power amount indicated by the discharging-side power amount information is displayed as the discharging-side power amount information. The charging / discharging system according to claim 1 .

3. The generation unit generates the display data for displaying on the display device the calendar screen on 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 on which, 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. The charging / discharging system according to claim 2 .

4. The generation unit generates the display data for displaying, on the display device, the calendar screen in which the charging-side power amount information and the discharging-side power amount information are displayed so as to have the same positional relationship for each predetermined period. 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 charging / discharging system, The acquisition unit As the charging-side power amount information, vehicle charging power amount information indicating the magnitude of the amount of power charged to the vehicle power storage device and first power amount information indicating the magnitude of the amount of power charged to the power storage device and / or the amount of power consumed by the power load are acquired, As the discharge-side power amount information, 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 the power amount 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 acquired, The generation unit generates the display data for causing the display device to display the calendar screen on which the vehicle charging energy information and the first energy information are displayed as the charging-side energy information and the vehicle discharging energy information and the second energy information are displayed as the discharging-side energy 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 charging / discharging system according to claim 5 .

7. The generation unit generates the display data for displaying, on the display device, the calendar screen on which, as the charging-side energy information, a graphic indicating the magnitude of the energy indicated by the vehicle charging energy information and a graphic indicating the magnitude of the energy indicated by the first energy information are displayed side by side, and, as the discharging-side energy information, a graphic indicating the magnitude of the energy indicated by the vehicle discharging energy information and a graphic indicating the magnitude of the energy indicated by the second energy information are displayed side by side. The charging / discharging 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 has been selected, The generation unit When the acquisition unit does not acquire information indicating that the charging-side power amount display information has been selected, the acquisition unit generates the display data for displaying, on the display device, 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 discharge-side power amount display information has been selected, the acquisition unit generates the display data for displaying, on the display device, the calendar screen on which the discharge-side power amount information is not displayed. The charge / discharge system according to any one of claims 1 to 7.

9. A control method for a charge / discharge system that charges / discharges between a vehicle power storage device, which is a power storage device included in a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to an electric load within the supply area, comprising: acquiring charging-side power amount information indicating the magnitude of the amount of power including the amount of power charged from the charging / discharging system to the vehicle power storage device, and discharging-side power amount information indicating the magnitude of the amount of power including the amount of power discharged from the vehicle power storage device to the charging / discharging system, for a plurality of predetermined periods; generating display data for displaying on a display device 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 a plurality of the predetermined periods are arranged; transmitting the display data to the display device; A method for controlling a charging and discharging system.

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

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