Charging and discharging system, and method for controlling the charging and discharging 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 performs charge and discharge with a vehicle power storage device, which is a power storage device possessed by a vehicle, and a control method for the charge-discharge system.

Background Art

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

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

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

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

Means for Solving the Problems

[0006] A charge-discharge system according to one aspect of the present invention is a charge-discharge system that performs charging and discharging between a vehicle energy storage device, which is an energy storage device of a vehicle, and a predetermined supply area to which power is supplied from a power grid, and supplies power to a power load in the supply area, and comprises: an acquisition unit that acquires charging-side energy amount information, which includes the amount of energy charged from the charge-discharge system to the vehicle energy storage device, and discharge-side energy amount information, which includes the amount of energy discharged from the vehicle energy storage device to the charge-discharge system, for 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 energy amount information and the discharge-side energy amount information are displayed for each predetermined period in a calendar in which a plurality of predetermined periods are arranged; and a transmission unit that transmits the display data to the display device.

[0007] The present invention can be realized not only as such a charge / discharge system, but also as a control method for such a charge / discharge system. The present invention can also be realized as a program for causing a computer to execute the processing included in the control method for a charge / discharge system, and can also be realized as a recording medium such as a computer-readable 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 equipped with a processing unit included in the charge / discharge system. [Effects of the Invention]

[0008] According to the charging and discharging system of the present invention, the exchange of power can be easily understood. [Brief explanation of the drawing]

[0009] [Figure 1] This diagram shows an overview of a remote monitoring system, including a charge / discharge system, according to an embodiment. [Figure 2] This is a perspective view showing the configuration of a charge / discharge system according to an embodiment. [Figure 3] This is a block diagram showing the functional configuration of a charge / discharge system according to an embodiment. [Figure 4] This is a block diagram showing the functional configuration of the first communication unit according to the embodiment. [Figure 5] This figure shows an example of display data shown on the display device according to the embodiment. [Figure 6] This flowchart shows the processing performed by the charge / discharge system according to the embodiment (control method of the charge / discharge system). [Figure 7] This flowchart shows the process by which the generation unit of the first communication unit according to the embodiment generates display data. [Figure 8] This flowchart shows the process by which the generation unit of the first communication unit according to the embodiment generates display data. [Figure 9] This is a flowchart showing the selection information acquisition process performed by the generation unit according to the embodiment. [Figure 10] This figure shows an example of display data generated by the generation unit according to the embodiment performing selection information acquisition processing. [Figure 11] This figure shows an example of display data generated by the generation unit according to the embodiment performing selection information acquisition processing. [Modes for carrying out the invention]

[0010] A charge-discharge system according to one aspect of the present invention is a charge-discharge system that performs charging and discharging between a vehicle energy storage device, which is an energy storage device of a vehicle, and a predetermined supply area to which power is supplied from a power grid, and supplies power to a power load in the supply area, and comprises: an acquisition unit that acquires charging-side energy amount information, which includes the amount of energy charged from the charge-discharge system to the vehicle energy storage device, and discharge-side energy amount information, which includes the amount of energy discharged from the vehicle energy storage device to the charge-discharge system, for 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 energy amount information and the discharge-side energy amount information are displayed for each predetermined period in a calendar in which a plurality of predetermined periods are arranged; and a transmission unit that transmits the display data to the display device.

[0011] According to this, the charge / discharge system generates display data to display a calendar screen on a display device that shows charging power amount information and discharging power amount information for each predetermined period in a calendar with multiple predetermined periods arranged in a sequence, and transmits the display data to the display device. In other words, the charge / discharge system transmits to the display device the display data of a calendar screen that shows information indicating the magnitude of the amount of power, including the amount of power charged and discharged between the charge / discharge system and the vehicle's energy storage device, 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 becomes easier to intuitively grasp the status of the amount of power. Therefore, since the exchange of power (amount of energy) between the charge / discharge system and the vehicle's energy storage device can be displayed on the display device's screen in a calendar format, the exchange of power in the charge / discharge system can be easily understood.

[0012] The generation unit may generate the display data for displaying the calendar screen on the display device, in which the charging side power amount information is represented by a charging side power amount figure, which is a figure indicating the magnitude of the power amount shown in the charging side power amount information, and the discharging side power amount information is represented by a discharging side power amount figure, which is a figure indicating the magnitude of the power amount shown in the discharging side power amount information.

[0013] According to this, the charge / discharge system generates display data for displaying a calendar screen on a display device that shows a graph of the amount of energy charged and a graph of the amount of energy discharged. In other words, the charge / discharge system generates display data for displaying a calendar screen on a display device that shows a graph indicating the magnitude of the amount of energy, including the amount of energy charged and discharged between the charge / discharge system and the vehicle's energy storage device. If the graph indicating the magnitude of the amount of energy can be displayed at predetermined intervals on the calendar, it becomes easier to intuitively grasp the status of the amount of energy. Therefore, since the exchange of power (amount of energy) between the charge / discharge system and the vehicle's energy storage device can be displayed as a calendar graph on the display device screen, the exchange of power in the charge / discharge system can be easily understood.

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

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

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

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

[0018] At least one of a power generation device and a power storage device is connected to the charge / discharge system. 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 at least one of the charging power amount of the power storage device and the power consumption amount of the power load. As the discharging-side power amount information, the acquisition unit acquires vehicle discharging power amount information indicating the magnitude of the discharging power amount of the vehicle power storage device and second power amount information indicating the magnitude of at least one of the power generation amount of the power generation device and the discharging power amount of the power storage device. The generation unit may generate the display data for causing the display device to display the calendar screen in 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 charge / discharge system generates display data for a calendar screen that shows vehicle charging energy information and first energy information as charging-side energy information, and vehicle discharge energy information and second energy information as discharge-side energy information. In other words, when at least one of a power generator and an energy storage device is connected to the charge / discharge system, the charging-side energy information is information indicating the magnitude of the charging energy of the vehicle energy storage device, and information indicating the magnitude of at least one of the charging energy of the energy storage device and the power consumption of the power load. The discharge-side energy information is information indicating the magnitude of the discharge energy of the vehicle energy storage device, and information indicating the magnitude of at least one of the power generated by the power generator and the discharge energy of the energy storage device. As a result, even when at least one of a power generator and an energy storage device is connected to the charge / discharge system, the exchange of power (energy) between the charge / discharge system and at least one of the power generator and energy storage device can be displayed on the display device screen in a calendar format. Therefore, the exchange of power in the charge / discharge system can be easily understood.

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

[0021] According to this, the charging and discharging system generates display data for displaying a calendar screen on a display device in which the first energy quantity information is displayed near the vehicle charging energy quantity information, and the second energy quantity information is displayed near the vehicle discharging energy quantity information. By displaying the vehicle charging energy quantity information and the first energy quantity information, which are charging-side energy quantity information, close together, and the vehicle discharging energy quantity information and the second energy quantity information, which are discharging-side energy quantity information, close together, it becomes easier to intuitively grasp the status of energy quantities. Therefore, the exchange of power (energy quantity) in the charging and discharging system can be summarized and displayed on the display device screen in a calendar format for each charging-side energy quantity information and each discharging-side energy quantity information, making it easy to understand the exchange of power in the charging and discharging system.

[0022] The generation unit may generate the display data for displaying the calendar screen on the display device, wherein the charging-side power amount information includes a figure showing the magnitude of the power amount indicated by the vehicle charging power amount information and a figure showing the magnitude of the power amount indicated by the first power amount information, displayed side by side, and the discharging-side power amount information includes a figure showing the magnitude of the power amount indicated by the vehicle discharging power amount information and a figure showing the magnitude of the power amount indicated by the second power amount information, displayed side by side.

[0023] According to this, the charging and discharging system generates display data for a calendar screen in which shapes representing the magnitude of the energy amounts of vehicle charging energy information and first energy information are arranged, and shapes representing the magnitude of the energy amounts of vehicle discharging energy information and second energy information are arranged. In other words, the shapes representing the magnitude of the energy amounts of the charging energy information are arranged to show the magnitude of the charging energy amount of the vehicle's energy storage device and the magnitude of at least one of the charging energy amount of the energy storage device and the power consumption amount of the power load. The shapes representing the magnitude of the energy amounts of the discharging energy information are arranged to show the magnitude of the discharging energy amount of the vehicle's energy storage device and the magnitude of at least one of the generating energy amount of the power generator and the discharging energy amount of the energy storage device. This makes it easy to intuitively grasp and compare the magnitude of the energy amounts of the charging energy information and the discharging energy information (which is excessive, which is balanced, etc.). Therefore, the exchange of power (energy amount) in the charging and discharging system can be easily grasped because the magnitude of the energy amounts of the charging energy information and discharging energy information can be clearly displayed on the display device screen in a calendar format.

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

[0025] According to this, if the charging / discharging system does not acquire information indicating that charging-side power quantity display information or discharging-side power quantity display information has been selected, it generates display data for a calendar screen in which neither charging-side power quantity information nor discharging-side power quantity information is displayed. As a result, the unselected information from the charging-side power quantity information and discharging-side power quantity information is not displayed on the calendar screen, allowing users to selectively display the information they want to see and making it easier to intuitively grasp the power situation. Therefore, the power (energy quantity) exchange in the charging / discharging system can be displayed on the display device screen in a calendar format, focusing on the information you want to see, making it easy to understand the power exchange in the charging / discharging system.

[0026] The following description will explain, with reference to the drawings, a charge / discharge system according to an embodiment of the present invention (including its modifications), and a control method for the charge / discharge system. The embodiments described below are all comprehensive or specific examples. The numerical values, components, arrangement and connection configurations of components, control processes, and the order of control processes shown in the following embodiments are examples and are not intended to limit the present invention. The figures are schematic and not necessarily strictly illustrative. In each figure, the same or similar components are denoted by the same reference numerals.

[0027] (Embodiment) [1. Description of the charging / discharging system 10] First, a general explanation of the charge / discharge system 10 will be given. Figure 1 is a diagram showing an overview of the remote monitoring system including the charge / discharge system 10 according to this embodiment.

[0028] As shown in Figure 1, the remote monitoring system includes multiple (three in Figure 1) supply areas 1, a server device 30 capable of collecting information from supply areas 1, a client device 40 capable of viewing information from supply areas 1, and a network N as a communication medium. This configuration allows for remote monitoring by displaying information from supply areas 1 on the display device 41 of the client device 40 via the network N (and server device 30).

[0029] Supply Area 1 is a designated site to which electricity is supplied from the power grid, and is divided into designated areas such as on a consumer basis, facility basis, or building basis. Within each of Supply Area 1, a charge / discharge system 10 equipped with a power conditioner 100 and a charge / discharger 200, and a power load 20 are located, and electricity is supplied from the charge / discharge system 10 to the power load 20. The power load 20 is the power load consumed by power-consuming equipment inside buildings (offices, etc.) located within each of Supply Area 1, or power-consuming equipment installed outdoors.

[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 implemented by a general-purpose computer system such as a personal computer executing a program, or it may be implemented by a dedicated computer system.

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

[0032] The client device 40 may be a desktop or laptop personal computer, or a so-called smartphone or tablet type communication terminal. The client device 40 includes a display device 41 such as an LCD display, an input device 42 such as a keyboard and mouse or touch panel, a control device, a storage unit (memory), and a communication device. The storage unit stores client programs, including a web browser, which are read and executed by the control device. Users who log in via the login screen displayed in the web browser of the client device 40 can access information about the system they are involved in, provided by the server device 30.

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

[0034] The charge / discharge system 10 is a system that charges and discharges a vehicle energy storage device 51, which is an energy storage device of a vehicle 50, in a predetermined supply area 1 to which power is supplied from the power grid 60, and supplies power to a power load 20 in the supply area 1. As shown in Figures 2 and 3, the charge / discharge system 10 includes a power conditioner 100 and charge / discharge units 200. In Figure 2, five charge / discharge units 200 are shown, and in Figure 3, only one charge / discharge unit 200 is shown for the sake of explanation, but the number of charge / discharge units 200 that the charge / discharge system 10 has is not particularly limited. The number of power conditioners 100 that the charge / discharge system 10 has is also not particularly limited.

[0035] In other words, the charging and discharging system 10 may be located in a centralized charging and discharging station with adjacent parking spaces S1 to S5, as shown in Figure 2, or it may be located in a distributed charging and discharging station (not shown) with dispersed parking spaces (e.g., located on different floors of a building). In Figure 2, a charger / discharger 200 is located in each parking space (S1, S2, ...), but the system 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 energy storage devices 51) may be connected to a single charger / discharger 200. In other words, the charging and discharging system 10 may be connected to multiple vehicles 50 (multiple vehicle energy storage devices 51), or only one vehicle 50 (one vehicle energy storage device 51). The charging and discharging station where the charging and discharging system 10 is located may be set up in a public place such as a public parking lot, or it may be set up on the premises of a company or private individual.

[0036] As shown in Figure 3, the power conditioner 100 is connected to the charger / discharger 200, the power grid 60, the power generator 70, the energy storage device 80, and the power load 20, and exchanges power with them. In other words, the power conditioner 100 receives power from the charger / discharger 200, the power grid 60, the power generator 70, and the energy storage device 80, and supplies power to the charger / discharger 200, the power grid 60, the energy storage device 80, and the power load 20.

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

[0038] The energy storage device 80 is a power supply device that can charge electricity from an external source and discharge electricity to the outside. The energy storage device 80 charges and discharges power via the power conditioner 100. Specifically, the energy storage device 80 has a plurality of energy storage elements connected in series and / or parallel. The energy storage elements are secondary batteries (single cells) that can charge and discharge electricity, such as non-aqueous electrolyte secondary batteries like lithium-ion secondary batteries. The energy storage elements are not limited to non-aqueous electrolyte secondary batteries, but may also be secondary batteries other than non-aqueous electrolyte secondary batteries, capacitors, primary batteries, or batteries using solid electrolytes.

[0039] The power load 20 is the 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 general loads 23 that are used under normal circumstances. Specific loads 21 are power loads used for elevators or commercial air conditioning in facilities such as offices, and specific loads 22 are lighting loads used for lighting or outlets in facilities such as offices. General loads 23 are power loads other than specific loads 21 and 22, such as household appliances or loads for operating machinery in factories.

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

[0041] The first converter circuit 110 is a power converter (DC / DC converter) that performs conversion between DC powers and is connected to the power generator 70 to boost the output voltage (DC) of the power generator 70 and output it. The first converter circuit 110 may also be a boost chopper. The second converter circuit 120 is a bidirectional power converter (bidirectional DC / DC converter) that performs conversion between DC powers and is connected to the energy storage device 80 to perform discharge and charge of the energy storage device 80. The second converter circuit 120 may also be a bidirectional chopper. The energy storage device 80 can store surplus power from the power generator 70 and power from the power grid 60 via the second converter circuit 120. If the amount of power generated by the power generator 70 is insufficient, the energy storage device 80 can discharge and compensate 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 (converting) of DC power to AC power and forward conversion (converting) of 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 system 60.

[0042] The switching circuit 140 is connected to a specific three-phase load 21 and a specific single-phase load 22 via a transformer, and is a circuit that switches contacts to supply power to specific loads 21 and 22 in the event of an emergency such as a power outage in the power system 60. Under normal circumstances, the switching circuit 140 is configured to supply power from the power system 60 to specific loads 21 and 22 by connecting contact A to the power line. In an emergency, the switching circuit 140 is configured to switch to contact B, allowing power to be supplied from the power generator 70 and / or the energy storage device 80 to specific loads 21 and 22 via the bidirectional inverter circuit 130. As a result, in the event of a power outage in the power system 60, backup power is supplied to specific loads 21 and 22 from at least one of the power generator 70, the energy storage device 80, and the charger / discharger 200.

[0043] The control unit 150 is a control device that controls various devices within the power conditioner 100. The power conditioner 100 further includes a current detection unit and a voltage detection unit (not shown). The current detection unit is, for example, a through-type Hall sensor that detects the current flowing through the power lines within the power conditioner 100. The voltage detection unit detects the voltage of the power lines within the power conditioner 100. The control unit 150 has the function of calculating and acquiring the power (active power) and energy entering and leaving the power lines based on the detected current and voltage. The control unit 150 also has the function of calculating the received power from the received current and system voltage detected by an external measuring instrument (external transducer) 62 installed at the power receiving point of the power system 60, or acquiring the received power calculated by the external measuring instrument 62. In this way, the control unit 150 is configured to acquire the power and energy of the current flowing between the charge / discharge system 10, the power system 60, the power generator 70, the energy storage device 80, and the power load 20. The control unit 150 controls the State of Charge (SOC) of the energy storage device 80 and the charging and discharging of the power conditioner 100. The system may also be configured to acquire information other than that mentioned above, such as the power and energy of the current flowing between the device 200 and the system.

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

[0045] The power conditioner 100 may be a three-phase interconnected energy storage system capable of supplying power to a wide range of power loads. For example, by using a so-called battery-equipped power conditioner, which integrates an energy storage device 80, as the power conditioner 100, space can be saved.

[0046] The charger / discharger 200 is connected to the vehicle energy storage device 51, which is an energy storage device of the vehicle 50, and is a charge / discharge station that performs charging and discharging with the vehicle energy storage device 51. The charger / discharger 200 is also connected to the power load 20 via the power conditioner 100, and under normal circumstances, it charges the vehicle energy storage device 51, and under emergency circumstances, it discharges the vehicle energy storage device 51 to supply power to the power load 20, such as specific loads 21 and 22.

[0047] Vehicle 50 is an automobile (mobile device) such as an electric vehicle (EV) and a plug-in hybrid electric vehicle (PHEV), and vehicle energy storage device 51 is a battery installed in them. Vehicle energy storage device 51, like energy storage device 80, has a plurality of energy storage elements (such as lithium-ion secondary batteries) connected in series and / or parallel.

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

[0049] The charge / discharge unit 210 is a bidirectional conversion circuit that selectively performs forward conversion (converting) of AC power to DC power and reverse conversion (inverting) of DC power to AC power. The charge / discharge unit 210 converts AC power from the power conditioner 100 to DC power and supplies it to the vehicle energy storage device 51 to charge the vehicle energy storage device 51. The charge / discharge unit 210 converts the DC power discharged from the vehicle energy storage device 51 to 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 the function of calculating (estimating) and acquiring the power and energy amount of the vehicle energy storage device 51 during charging and discharging based on the output of the charge / discharge unit 210. The control unit 220 may also have the function of acquiring and monitoring the State of Charge (SOC) of the vehicle energy storage device 51. The control unit 220 may also have a memory unit, a display panel, and an operation unit.

[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 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 the power and amount of energy charged and discharged between the vehicle energy storage device 51 and the charge / discharge unit 210 (charge / discharge system 10) from the control unit 220 and transmits it to the first communication unit 160. Thus, in this embodiment, the first communication unit 160 functions as the master unit and the second communication unit 230 functions as the slave unit.

[0052] As shown in Figure 2, if the charge / discharge system 10 is equipped with multiple chargers / dischargers 200, the multiple second communication units 230 of the multiple chargers / dischargers 200 are configured to communicate with the first communication unit 160, and information is transmitted from the multiple second communication units 230 to the first communication unit 160. The second communication units 230 may also be configured to communicate with other second communication units 230 of other chargers / dischargers 200 via wired or wireless means, and may acquire information from the other second communication units 230 before transmitting the information to the first communication unit 160.

[0053] [2 Explanation of the First Communications Unit 160] Next, the first communication unit 160 provided in the power conditioner 100 of the charge / discharge system 10 will be described in detail. Figure 4 is a block diagram showing the functional configuration of the first communication unit 160 according to this embodiment. Figure 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). Figure 5 is a diagram showing an example of display data 164m displayed on the display device 41 according to this embodiment. In Figure 5, a personal computer monitor is shown as an example of the display device 41, but it may also be a touch panel of a smartphone or tablet-type communication terminal.

[0054] As shown in Figure 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 power quantity information 165 (see Figure 5) and discharging-side power quantity information 166 (see Figure 5) for multiple predetermined periods. A predetermined period is a set period such as one hour, half a day, one day, one week, or one month. Multiple predetermined periods include one day consisting of 24 one-hour periods, a half-month consisting of 30 or more half-day periods, one month consisting of 30 or more one-day periods, one month consisting of 4 or more one-week periods, and one year consisting of 12 one-month periods. In this embodiment, the multiple predetermined periods are one month consisting of multiple one-day periods, and the acquisition unit 161 acquires various information such as charging-side power quantity information 165 and discharging-side power quantity information 166 for each day of the month (see Figure 5).

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

[0057] The discharge-side power quantity information 166 is information indicating the magnitude of power quantity, including the amount of power discharged from the vehicle energy storage device 51 to the charge / discharge system 10 (the amount of power discharged from the vehicle energy storage device 51 to the charge / discharge system 10). The discharge-side power quantity information 166 is information indicating the magnitude of power quantity input to the charge / discharge system 10. As shown in Figure 5, the discharge-side power quantity information 166 includes vehicle discharge power quantity information 164b, which indicates the magnitude of the amount of power discharged from the vehicle energy storage device 51, and second power quantity information 164d, which indicates the magnitude of at least one of the amount of power quantity, namely the amount of power generated by the power generator 70 and the amount of power discharged by the energy storage device 80. In other words, the acquisition unit 161 acquires the vehicle discharge power quantity information 164b and the second power quantity information 164d as the discharge-side power quantity information 166. In this embodiment, the second energy information 164d includes both second energy information 164d1, which indicates the magnitude of the energy generated by the power generator 70, and second energy information 164d2, which indicates the magnitude of the energy discharged by the energy storage device 80. In this embodiment, the discharge-side energy information 166 is historical information indicating the magnitude of past energy input to the charge / discharge system 10, but it may also be estimated information indicating the magnitude of future energy that will be input to the charge / discharge system 10.

[0058] The acquisition unit 161 acquires vehicle charging energy amount information 164a and vehicle discharging energy amount information 164b, etc. from the second communication unit 230 of the charger / discharger 200. The acquisition unit 161 acquires first energy amount information 164c (164c1 and 164c2) and second energy amount information 164d (164d1 and 164d2), etc. from the control unit 150 of the power conditioner 100. The acquisition unit 161 writes the acquired vehicle charging energy amount information 164a, vehicle discharging energy amount information 164b, first energy amount information 164c (164c1 and 164c2), and second energy amount information 164d (164d1 and 164d2), etc., to the storage unit 164 for storage.

[0059] The acquisition unit 161 is configured 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] The charging-side power amount display information 167 is information for displaying the charging-side power amount information 165 on the display device 41, and as shown in Figure 5, it includes vehicle charging power amount display information 164i and first power amount display information 164k. The vehicle charging power amount display information 164i is information for displaying vehicle charging power amount information 164a (information indicating the magnitude of the charging power amount of the vehicle energy storage device 51) on the display device 41. The first power amount display information 164k is information for displaying first power amount information 164c (information indicating the magnitude of at least one of the power amounts of the charging power amount of the energy storage device 80 and the power consumption amount of the power load 20) on the display device 41. In this embodiment, the first power amount display information 164k includes first power amount display information 164k1 for displaying first power amount information 164c1 and first power amount display information 164k2 for displaying first power amount 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 identifiable characters, symbols, or graphics (in Figure 5, graphics and characters). The vehicle charging energy display information 164i is displayed with the same pattern (hatching) or the same colored graphics as the vehicle charging energy display information 164a, and the words "EV charging amount". The first energy display information 164k1 is displayed with the same pattern (hatching) or the same colored graphics as the first energy display information 164c1, and the words "load consumption". The first energy display information 164k2 is displayed with the same pattern (hatching) or the same colored graphics as the first energy display information 164c2, and the words "ESS charging amount".

[0062] The discharge-side power amount display information 168 is information for displaying the discharge-side power amount information 166 on the display device 41, and as shown in Figure 5, it includes vehicle discharge power amount display information 164j and second power amount display information 164l. The vehicle discharge power amount display information 164j is information for displaying the vehicle discharge power amount information 164b (information indicating the magnitude of the discharge power amount of the vehicle energy storage device 51) on the display device 41. The second power amount display information 164l is information for displaying the second power amount information 164d (information indicating the magnitude of at least one of the power amounts of the power generation amount of the power generator 70 and the discharge power amount of the energy storage device 80) on the display device 41. In this 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 identifiable characters, symbols, or figures (in Figure 5, figures and characters). The vehicle discharge energy display information 164j is displayed with the same pattern (hatching) or the same colored figure as the vehicle discharge energy display information 164b, and the words "EV discharge amount". The second energy display information 164l1 is displayed with the same pattern (hatching) or the same colored figure as the second energy display information 164d1, and the words "PV power generation amount". The second energy display information 164l2 is displayed with the same pattern (hatching) or the same colored figure as the second energy display information 164d2, and the words "ESS discharge amount".

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

[0066] Specifically, the generation unit 162 generates display data 164m for displaying a calendar screen on the display device 41, in which the charging-side power quantity figure 165a is displayed as charging-side power quantity information 165, and the discharge-side power quantity figure 166a is displayed as discharge-side power quantity information 166. The charging-side power quantity figure 165a is a figure that shows the magnitude (value of power quantity) of the power quantity indicated in the charging-side power quantity information 165. In Figure 5, the charging-side power quantity figure 165a is shown as a rectangular bar graph with the magnitude (numerical value) of the power quantity in the charging-side power quantity information 165 as its height. The discharge-side power quantity figure 166a is a figure that shows the magnitude (value of power quantity) of the power quantity indicated in the discharge-side power quantity information 166. In Figure 5, the discharge-side power quantity figure 166a is shown as a rectangular bar graph with the magnitude (numerical value) of the power quantity in the discharge-side power quantity information 166 as its height.

[0067] The generation unit 162 generates display data 164m for displaying a calendar screen on the display device 41, in which the charging-side power quantity information 165 and the discharging-side power quantity information 166 are displayed in the same relative position for each predetermined period. In other words, in each predetermined period, the charging-side power quantity information 165 is positioned on the same side as the discharging-side power quantity information 166. In Figure 5, in each day, the charging-side power quantity information 165 is positioned on the left and the discharging-side power quantity information 166 is positioned on the right, with the charging-side power quantity information 165 and the discharging-side power quantity information 166 being arranged side by side in the left-right direction. Furthermore, in each predetermined period (each day), the charging-side power quantity information 165 and the discharging-side power quantity information 166 are the same shape (in Figure 5, they are the same pattern, but they can also be the same color).

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

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

[0070] The generation unit 162 generates display data 164m for displaying a calendar screen on the display device 41, which is the charging-side energy amount information 165, with a numerical value indicating the magnitude of the energy amount shown in the charging-side energy amount information 165 displayed at a position corresponding to the charging-side energy amount figure 165a. In other words, a numerical value (kWh, etc.) indicating the magnitude of the energy amount shown in the vehicle charging energy amount information 164a and the first energy amount information 164c (164c1 and 164c2) is displayed at a position corresponding to the vehicle charging energy amount figure 164e and the first energy amount figure 164g (164g1 and 164g2). In Figure 5, the energy values ​​of the vehicle charging energy amount information 164a and the first energy amount information 164c (164c1 and 164c2) are displayed inside the vehicle charging energy amount figure 164e and the first energy amount figure 164g (164g1 and 164g2).

[0071] The generation unit 162 generates display data 164m for displaying a calendar screen on the display device 41, which is the discharge-side energy amount information 166, with a numerical value indicating the magnitude of the energy amount shown in the discharge-side energy amount information 166 displayed at a position corresponding to the discharge-side energy amount figure 166a. In other words, a numerical value (kWh, etc.) indicating the magnitude of the energy amount shown in the vehicle discharge energy amount information 164b and the second energy amount information 164d (164d1 and 164d2) is displayed at a position corresponding to the vehicle discharge energy amount figure 164f and the second energy amount figure 164h (164h1 and 164h2). In Figure 5, the energy values ​​of the vehicle discharge energy amount information 164b and the second energy amount information 164d (164d1 and 164d2) are displayed inside the vehicle discharge energy amount figure 164f and the second energy amount figure 164h (164h1 and 164h2).

[0072] The generation unit 162 generates display data 164m for displaying a calendar screen on the display device 41 that further displays charging-side power information 167 for displaying charging-side power information 165 and discharge-side power information 168 for displaying discharge-side power information 166. If the acquisition unit 161 does not acquire selection information 41a indicating that charging-side power information 167 has been selected, the generation unit 162 generates display data 164m for displaying a calendar screen on the display device 41 that does not display charging-side power information 165. If the acquisition unit 161 does not acquire selection information 41a indicating that discharge-side power information 168 has been selected, the generation unit 162 generates display data 164m for displaying a calendar screen on the display device 41 that does not display discharge-side power information 166.

[0073] A detailed explanation of the process by which the generation unit 162 generates the display data 164m will be given later. Various information necessary for the generation unit 162 to generate the display data 164m is stored in the storage unit 164, and the generation unit 162 reads and obtains this information from the storage unit 164. This information may be stored in the storage unit 164 in advance, or information obtained by the acquisition unit 161 may be written to and stored in the storage unit 164. The generation unit 162 may also obtain information from processing units other than the storage unit 164 (such as user input). The generation unit 162 writes the generated display data 164m to the storage unit 164 for storage.

[0074] The transmitting unit 163 transmits the display data 164m to the display device 41. The transmitting unit 163 reads the display data 164m generated by the generation unit 162 and stored in the storage unit 164 from the storage unit 164 and transmits it 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 Figure 5.

[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 amount information 164a, vehicle discharging energy amount information 164b, first energy amount information 164c, second energy amount information 164d, vehicle charging energy amount diagram 164e, vehicle discharging energy amount diagram 164f, first energy amount diagram 164g, second energy amount diagram 164h, vehicle charging energy amount display information 164i, vehicle discharging energy amount 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 listed above, such as data obtained during the generation process of the display data 164m by the generation unit 162. In the storage unit 164, if there are any changes to this data, the data is updated each time, but it is also possible to store this data.

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

[0077] As shown in Figure 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 multiple predetermined periods (S102). The details of each piece of information acquired by the acquisition unit 161 are as described above, so a further explanation is omitted.

[0078] The generation unit 162 then generates display data 164m for displaying a calendar screen on the display device 41, in which charging-side power amount information 165 and discharging-side power amount information 166 are displayed for each predetermined period in a calendar with multiple predetermined periods arranged in a sequence (S104). A detailed explanation 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] Subsequently, if the acquisition unit 161 acquires the selection information 41a, the generation unit 162 performs the selection information acquisition process (S108). A detailed explanation of the selection information acquisition process performed by the generation unit 162 will be given later.

[0081] As described above, the processing performed by the charging / discharging system 10 (first communication unit 160) (control method of the charging / discharging system) is completed.

[0082] Next, the process by which the generation unit 162 generates the display data 164m (S104 in Figure 6) 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 generates the display data 164m according to this embodiment.

[0083] As shown in Figure 5, the generation unit 162 generates display data 164m for displaying the following screen on the display device 41.

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

[0085] Specifically, the generation unit 162 displays the vehicle charging energy information 164a and the first energy information 164c (164c1 and 164c2) as 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 discharge energy information 164b. Specifically, the generation unit 162 displays the vehicle charging energy figure 164e and the first energy figure 164g (164g1 and 164g2) side by side (stacked) as charging-side energy information 165 (S302 in Figure 8).

[0086] The generation unit 162 then displays the vehicle discharge energy information 164b and the second energy information 164d (164d1 and 164d2) as discharge-side energy information 166. 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 charge energy information 164a. Specifically, the generation unit 162 displays the vehicle discharge energy figure 164f and the second energy figure 164h (164h1 and 164h2) side by side (stacked) as discharge-side energy information 166 (S304 in Figure 8).

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

[0088] The generation unit 162 then displays the charging-side power information 165 and the discharging-side power information 166 in the same relative position at predetermined intervals (S206 in Figure 7). In other words, the generation unit 162 arranges the charging-side power information 165 to be on the same side (left side) as the discharging-side power information 166 during each predetermined period.

[0089] The generation unit 162 then further displays charging-side energy display information 167 for displaying charging-side energy information 165, and discharge-side energy display information 168 for displaying discharge-side energy information 166 (S208 in Figure 7). Specifically, the generation unit 162 displays the vehicle charging energy display information 164i and the first energy display information 164k (164k1 and 164k2) included in the charging-side energy display information 167 so that they are positioned adjacent to the calendar display (below the calendar display in Figure 5). The generation unit 162 also displays the vehicle discharge energy display information 164j and the second energy display information 164l (164l1 and 164l2) included in the discharge-side energy display information 168 so that they are positioned adjacent to the calendar display (below the calendar display in Figure 5).

[0090] As described above, the process by which the generation unit 162 generates the display data 164m (S104 in Figure 6) is completed.

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

[0092] As shown in Figure 9, the generation unit 162 determines whether the acquisition unit 161 has acquired selection information 41a indicating that the charging-side power amount display information 167 (vehicle charging power amount display information 164i, first power amount display information 164k1 or 164k2) has been selected (S402). When a user selects the charging-side power amount display information 167 displayed on the display device 41 of the client device 40 by clicking or touching it via the input device 42, selection information 41a indicating that the charging-side power amount display information 167 has been selected is transmitted to the acquisition unit 161. When the acquisition unit 161 acquires the selection information 41a, the generation unit 162 determines that the acquisition unit 161 has acquired selection information 41a indicating that the charging-side power amount 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 consumption display information 167 has been selected (YES in S402), it generates display data 164m to display a calendar screen showing the charging-side power consumption information 165 on the display device 41 (S404). If the generation unit 162 determines that the acquisition unit 161 has not acquired selection information 41a indicating that the charging-side power consumption display information 167 has been selected (NO in S402), it generates display data 164m to display a calendar screen on the display device 41 that does not show the charging-side power consumption 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 a 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, selection information 41a indicating that the discharge-side power amount display information 168 has been selected is transmitted to the acquisition unit 161. When the acquisition unit 161 acquires the selection information 41a, the generation unit 162 determines that the acquisition unit 161 has acquired 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 consumption display information 168 has been selected (YES in S408), it generates display data 164m to display a calendar screen showing the discharge-side power consumption information 166 on the display device 41 (S410). If the generation unit 162 determines that the acquisition unit 161 has not acquired selection information 41a indicating that the discharge-side power consumption display information 168 has been selected (NO in S408), it generates display data 164m to display a calendar screen on the display device 41 that does not show the discharge-side power consumption information 166 (S412).

[0096] In Figure 10, among the discharge-side energy display information 168, the second energy display information 164l1 is selected to display the second energy information 164d1, which indicates the magnitude of the energy generated by the power generator 70 (a figure with the same pattern or color as the second energy figure 164h1 is displayed). Therefore, in Figure 10, the generation unit 162 determines that the acquisition unit 161 has acquired selection information 41a, which indicates that the second energy display information 164l1 among the discharge-side energy display information 168 has been selected. As a result, the generation unit 162 generates display data 164m to display a calendar screen on the display device 41 that shows the second energy information 164d1 (second energy figure 164h1 and the energy value) among the discharge-side energy information 166.

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

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

[0099] [4. Explanation of Effects] As described above, the charge / discharge system 10 according to this embodiment generates display data 164m for displaying a calendar screen on the display device 41 that shows charging-side power amount information 165 and discharging-side power amount information 166 for each predetermined period in a calendar with multiple predetermined periods arranged in a sequence, and transmits this data to the display device 41. In other words, the charge / discharge system 10 transmits to the display device 41 the display data 164m of a calendar screen that shows information indicating the magnitude of power (such as charge / discharge history), including the amount of power charged and discharged between the charge / discharge system 10 and the vehicle energy storage device 51, for each predetermined period of the calendar. If information indicating the magnitude of power can be displayed for each predetermined period of the calendar, it is easy to intuitively grasp the status of power. Therefore, since the exchange of power (amount of energy) between the charge / discharge system 10 and the vehicle energy storage device 51 can be displayed on the display device 41 screen in a calendar format, the exchange of power in the charge / discharge system 10 can be easily grasped.

[0100] The charge / discharge system 10 generates display data 164m for displaying a calendar screen on the display device 41 that shows the charging-side energy amount figure 165a and the discharging-side energy amount figure 166a. In other words, the charge / discharge system 10 generates display data 164m for displaying a calendar screen on the display device 41 that shows a figure indicating the magnitude of the energy amount, including the charge and discharge energy amount between the charge / discharge system 10 and the vehicle energy storage device 51. If the figure indicating the magnitude of the energy amount can be displayed at predetermined intervals on the calendar, it is easy to intuitively grasp the status of the energy amount. Therefore, since the exchange of power (energy amount) between the charge / discharge system 10 and the vehicle energy storage device 51, etc. can be displayed as a calendar on the screen of the display device 41, the exchange of power in the charge / discharge system 10 can be easily grasped.

[0101] The charge / discharge system 10 generates display data 164m for displaying a calendar screen on the display device 41, where numerical values ​​indicating the magnitude of the energy amounts of the charge-side energy amount information 165 and the discharge-side energy amount information 166 are further displayed at positions corresponding to the charge-side energy amount figures 165a and the discharge-side energy amount figures 166a. In other words, the charge / discharge system 10 generates display data 164m for a calendar screen where numerical values ​​indicating the magnitude of the energy amount, including the charge and discharge energy amounts between the system and the vehicle energy storage device 51, are further displayed at positions corresponding to the figures indicating the magnitude of the energy amount. Displaying numerical values ​​of the energy amount at positions corresponding to the energy amount figures makes it easy to intuitively grasp the status of the energy amount. Therefore, the exchange of power (energy amount) between the charge / discharge system 10 and the vehicle energy storage device 51, etc., can be displayed on the display device 41 screen using figures and numerical values ​​in a calendar format, making it easy to understand the exchange of power in the charge / discharge system 10.

[0102] The charging and discharging system 10 generates display data 164m for displaying a calendar screen on the display device 41 in which information on the amount of energy, including the amount of energy charged, and information on the amount of energy, including the amount of energy discharged, are displayed in the same relative position at predetermined intervals. By displaying the information on the amount of energy, including the amount of energy charged (charging-side energy information 165) and the information on the amount of energy, including the amount of energy discharged (discharging-side energy information 166), in the same relative position at predetermined intervals, it is easy to intuitively grasp the status of the energy (whether one is excessive, whether it is balanced, etc.). Therefore, since the exchange of power (energy) between the charging and discharging system 10 and the vehicle energy storage device 51, etc., can be displayed on the display device 41 screen in the same relative position as a calendar, the exchange of power in the charging and discharging system 10 can be easily grasped.

[0103] The charge / discharge system 10 generates display data 164m for a calendar screen, which displays vehicle charge energy information 164a and first energy information 164c as charge-side energy information 165, and vehicle discharge energy information 164b and second energy information 164d as discharge-side energy information 166. In other words, when at least one of the power generator 70 and the energy storage device 80 is connected to the charge / discharge system 10, the charge-side energy information 165 includes information indicating the magnitude of the charge energy of the vehicle energy storage device 51 and information indicating the magnitude of at least one of the charge energy of the energy storage device 80 and the power consumption of the power load 20. The discharge-side energy information 166 includes information indicating the magnitude of the discharge energy of the vehicle energy storage device 51 and information indicating the magnitude of at least one of the power generated by the power generator 70 and the discharge energy of the energy storage device 80. As a result, even when at least one of the power generator 70 and the energy storage device 80 is connected to the charge / discharge system 10, the exchange of power (energy) between the charge / discharge system 10 and at least one of the power generator 70 and the energy storage device 80 can be displayed on the screen of the display device 41 in a calendar format. 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 a calendar screen on the display device 41, in which the first energy information 164c is displayed near the vehicle charging energy information 164a and the second energy information 164d is displayed near the vehicle discharging energy information 164b. By displaying the vehicle charging energy information 164a and the first energy information 164c, which are charging-side energy information 165, close together, and the vehicle discharging energy information 164b and the second energy information 164d, which are discharging-side energy information 166, close together, it is easy to intuitively grasp the status of the energy. Therefore, the exchange of power (energy) in the charging / discharging system 10 can be summarized and displayed on the display device 41 screen in a calendar format for each charging-side energy information 165 and each discharging-side energy information 166, making it easy to understand the exchange of power in the charging / discharging system 10.

[0105] The charging / discharging system 10 generates display data 164m for a calendar screen in which figures representing the magnitude of the energy amounts of vehicle charging energy information 164a and first energy information 164c are arranged, and figures representing the magnitude of the energy amounts of vehicle discharging energy information 164b and second energy information 164d are arranged. In other words, as a figure representing the magnitude of the energy amount of charging-side energy information 165, a figure representing the magnitude of the charging energy amount of the vehicle energy storage device 51 and a figure representing the magnitude of at least one of the charging energy amount of the energy storage device 80 and the power consumption amount of the power load 20 are arranged. As a figure representing the magnitude of the energy amount of discharging-side energy information 166, a figure representing the magnitude of the discharging energy amount of the vehicle energy storage device 51 and a figure representing at least one of the power generation amount of the power generator 70 and the discharging energy amount of the energy storage device 80 are arranged. This makes it easy to intuitively grasp and compare the magnitude of the energy amount of charging-side energy information 165 and the magnitude of the energy amount of discharging-side energy information 166 (e.g., which is excessive, which is balanced, etc.). Therefore, the exchange of power (energy) in the charge / discharge system 10 can be easily understood by displaying the magnitude of the energy amounts in the charging-side energy information 165 and the discharging-side energy information 166 on the display device 41 screen in a calendar format.

[0106] If the charge / discharge system 10 does not acquire information indicating that either 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 the 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 unselected information from the charging-side power amount information 165 and the discharging-side power amount information 166 is not displayed on the calendar screen, allowing users to selectively display the information they want to see and making it easier to intuitively grasp the power situation. Therefore, the power (energy amount) exchange in the charge / discharge system 10 can be displayed on the display device 41 screen in a calendar format, focusing on the information that users want to see, making it easy to understand the power exchange in the charge / discharge system 10.

[0107] As described above, the charging and discharging system 10 can display a calendar screen on the display device 41 that is neither too complicated nor too simple, allowing for easy understanding of the power exchange in the charging and discharging system 10 via the display device 41. By viewing such a calendar screen, it is possible to intuitively understand the characteristics and trends of dates or days of the week, thereby improving the operation of vehicles 50 (commercial vehicles or sales vehicles, etc.) and optimizing energy management. Since the calendar display on the display device 41 can be narrowed down to the desired target, it is possible to optimize energy management, such as increasing the charge level of the energy storage device 80 on weekends to prepare for the increased power consumption of the power load 20 on Monday.

[0108] For public or private facilities considering the introduction of the charging / discharging system 10, an increase in power reception from the power grid 60 due to system operation is undesirable. By understanding the power exchange within the charging / discharging system 10 and efficiently receiving power from the power grid 60, increases in electricity costs can be suppressed, promoting the introduction of the charging / discharging system 10. This can also contribute to strengthening disaster prevention functions in public facilities or strengthening BCPs (Business Continuity Plans in the event of a power outage) in private facilities.

[0109] By providing a charging and discharging system 10 that allows for easy monitoring of power exchange, it contributes to Goal 7 of the United Nations-led Sustainable Development Goals (SDGs): "Ensure access to affordable, reliable, sustainable, and modern energy for all."

[0110] [5 Explanation of variations] Although the charge / discharge system 10 and the like according to this embodiment have been described above, the present invention is not limited to the above embodiment. The embodiments disclosed herein are illustrative and not restrictive in all respects, and the scope of the present invention includes all modifications in the sense and scope equivalent to the claims.

[0111] In the above embodiment, when a frame of a divided period (a frame of dates) is selected, the magnitude (numerical value) of the power consumption indicated by the figures displayed within that frame may be displayed in a list for each item (each figure). In other words, when the acquisition unit 161 acquires information indicating that the frame has been selected, the generation unit 162 generates display data 164m to display on the display device 41 a screen in which the magnitude (numerical value) of the power consumption indicated by the figures displayed within that 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 the display device 41 of the client device 40 displays a screen in which the magnitude (numerical value) of the power consumption indicated by the figures displayed within that frame is displayed in a list for each item.

[0112] In the above embodiment, the functions of the first communication unit 160 may be possessed by the second communication unit 230, or by other equipment within the charging / discharging system 10, or by equipment outside the charging / discharging system 10 (such as the server device 30 or client device 40).

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

[0114] In the above embodiment, both the power generator 70 and the energy storage device 80 are connected to the charge / discharge system 10, but it is sufficient if at least one of the power generator 70 and the energy storage device 80 is connected. Alternatively, neither the power generator 70 nor the energy storage device 80 is connected to the charge / discharge system 10.

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

[0116] In the above embodiment, the first communication unit 160 is provided with a storage unit 164, but it may also be provided without a storage unit 164, by storing information on an external recording medium and retrieving information from the recording medium.

[0117] In the above embodiment, the calendar screen displayed by the display data 164m is not a screen in which one month is divided into one day, but can 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 one hour, a screen in which half a month is divided into half a day, a screen in which one month is divided into one week, or a screen in which one year is divided into one month.

[0118] In the above embodiment, the charging-side energy quantity figure 165a and the discharging-side energy quantity figure 166a, and the figures contained therein, are rectangular bar graphs with the magnitude (numerical value) of the energy quantity as the height. However, any shape of figure, such as a triangle or a circle, may be used.

[0119] In the above embodiment, the numerical value of the energy is displayed inside the figures included in the charging-side energy figure 165a and the discharging-side energy figure 166a. However, 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 power information 165 displays the charging-side power information graphic 165a and the numerical value of the power; however, it is not necessary for either the charging-side power information graphic 165a or the numerical value of the power to be displayed. The charging-side power information 165 may also display characters or symbols other than the charging-side power information graphic 165a and the numerical value of the power. The same applies to the discharge-side power information 166.

[0121] In the above embodiment, the charging-side power information 165 is positioned to the left of the discharging-side power information 166, but it may be positioned to the right, above, or below the discharging-side power information 166, or in any other position. The charging-side power information 165 and the discharging-side power information 166 do not have to be displayed in the same relative position.

[0122] In the above embodiment, the charging-side energy information 165 is displayed with the vehicle charging energy figure 164e and the first energy figure 164g (164g1 and 164g2) arranged vertically (stacked), but they may be displayed horizontally. The vehicle charging energy figure 164e and the first energy figure 164g may be displayed close together without being adjacent, or they may be displayed at relatively far distances. The same applies to the discharge-side energy information 166.

[0123] In the above embodiment, the order of the various processes performed by the generation unit 162 may be changed. Processes S202 to S208 in Figure 7 may be arbitrarily rearranged. Processes S302 and S304 in Figure 8 may be swapped. Processes S402 to S406 and S408 to S412 in Figure 9 may be swapped.

[0124] The present invention can be realized not only as a charge / discharge system 10 and a control method for the charge / discharge system 10, but also as a program for causing a computer to execute the processing included in the control method for the charge / discharge system 10. In other words, each component of the first communication unit 160 of the charge / discharge 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-temporary 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® Disc), or semiconductor memory. The program can be distributed via the recording medium and a transmission medium such as the Internet. The present invention can also be realized as an integrated circuit that includes a processing unit included in the charge / discharge system 10. In other words, each functional block of the first communication unit 160 of the charge / discharge system 10 shown in Figure 4 may be realized as an integrated circuit, which is an LSI (Large Scale Integration). These may be individually integrated into one chip, or some or all of them may be integrated into one chip. Thus, the first communication unit 160 of the charging / discharging system 10 may be implemented by having each component comprised of dedicated hardware, or by executing a software program suitable for each component.

[0125] Forms constructed by combining any of the components in the above embodiments and their variations are also included within the scope of the present invention. [Industrial applicability]

[0126] This invention can be applied to charge and discharge systems that perform charging and discharging between a vehicle and its energy storage device. [Explanation of Symbols]

[0127] 1. Supply Area 10. Charging and discharging systems 20 Power load 30 Server Devices 40 Client devices 41 Display device 41a Selection Information 50 vehicles 51 Vehicle Energy Storage System 60 Power system 70 Power generation equipment 80 Energy storage device 100 Power Conditioners 160 First Communications Department 161 Acquisition Department 162 Generation part 163 Transmitter 164 Storage section 164a Vehicle Charging Power Information 164b Vehicle discharge power information 164c, 164c1, 164c2 First power amount information 164d, 164d1, 164d2 Second electric energy information 164e Vehicle Charging Energy Diagram 164f Vehicle Discharge Energy Diagram 164g, 164g1, 164g2 First energy quantity diagram 164h, 164h1, 164h2 Second electric energy figure 164i Vehicle Charging Power Display Information 164j Vehicle Discharge Energy Display Information 164k, 164k1, 164k2 First electric energy display information 164l, 164l1, 164l2 Second electric energy display information 164m Displayed data 165 Charging side power amount information 165a Charging side power quantity diagram 166 Discharge-side power consumption information 166a Discharge-side power quantity 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 charge-discharge system that, in a predetermined supply area where power is supplied from the power grid, performs charging and discharging with a mobile energy storage device, which is an energy storage device owned by a mobile body, and supplies power to power loads within the said supply area, An acquisition unit that acquires charging-side power quantity information indicating the magnitude of the amount of power, including the amount of power charged from the charging / discharging system to the mobile energy storage device, over multiple predetermined periods, and discharge-side power quantity information indicating the magnitude of the amount of power, including the amount of power discharged from the mobile energy storage device to the charging / discharging system. A generation unit generates display data for displaying a calendar screen on a display device in which at least one of the charging-side power amount information and the discharging-side power amount information is displayed for each predetermined period in a calendar in which multiple predetermined periods are arranged; A transmission unit that transmits the aforementioned display data to the display device, A charging and discharging system equipped with the following features.

2. The generation unit generates the display data for displaying the calendar screen on the display device, which displays a charging-side power quantity figure as the charging-side power quantity information, which is a figure indicating the magnitude of the power quantity shown in the charging-side power quantity information, and a discharge-side power quantity figure as the discharge-side power quantity information, which is a figure indicating the magnitude of the power quantity shown in the discharge-side power quantity information. The charge / discharge system according to claim 1.

3. The generation unit generates the display data for displaying the calendar screen on the display device, wherein the charging side power amount information includes a numerical value indicating the magnitude of the power amount shown in the charging side power amount information, displayed at a position corresponding to the charging side power amount figure, and the discharging side power amount information includes a numerical value indicating the magnitude of the power amount shown in the discharging side power amount information, displayed at a position corresponding to the discharging side power amount figure. The charge / discharge system according to claim 2.

4. The generation unit generates the display data for displaying the calendar screen on the display device, such that the charging power amount information and the discharging power amount information are in the same positional relationship at each predetermined period. A charge / discharge system according to any one of claims 1 to 3.

5. The charging and discharging system is connected to at least one of a power generation device and an energy storage device. The acquisition unit is, As the charging-side power quantity information, the following are acquired: mobile charging power quantity information indicating the magnitude of the charging power quantity of the mobile power storage device, and first power quantity information indicating the magnitude of at least one of the power quantity of the charging power quantity of the power storage device and the power consumption quantity of the power load. As the discharge-side power quantity information, the following are acquired: mobile discharge power quantity information indicating the magnitude of the discharge power quantity of the mobile energy storage device, and second power quantity information indicating the magnitude of at least one of the power quantity of the power generation device and the discharge power quantity of the energy storage device. The generation unit generates the display data for displaying the calendar screen on the display device, which displays the mobile body charging power amount information and the first power amount information as the charging side power amount information, and the mobile body discharge power amount information and the second power amount information as the discharge side power amount information. A charge / discharge system according to any one of claims 1 to 4.

6. The generation unit generates the display data for displaying the calendar screen on the display device, in which the first energy information is displayed closer to the mobile body charging energy information than the mobile body discharge energy information, and the second energy information is displayed closer to the mobile body discharge energy information than the mobile body charging energy information. The charge / discharge system according to claim 5.

7. The generation unit generates the display data for displaying the calendar screen on the display device, in which the charging-side power information includes a figure showing the magnitude of the power amount indicated by the mobile body charging power amount information and a figure showing the magnitude of the power amount indicated by the first power amount information, displayed side by side, and the discharging-side power amount information includes a figure showing the magnitude of the power amount indicated by the mobile body discharge power amount information and a figure showing the magnitude of the power amount indicated by the second power amount information, displayed side by side. The charge / discharge system according to claim 5 or 6.

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

9. A control method for a charge-discharge system that supplies power to power loads within a predetermined supply area where power is supplied from a power grid, by performing charge-discharge operations with a mobile energy storage device, which is an energy storage device owned by a mobile body, in the supply area, The system acquires charging-side power quantity information indicating the magnitude of the amount of power, including the amount of power charged from the charging / discharging system to the mobile energy storage device, and discharge-side power quantity information indicating the magnitude of the amount of power, including the amount of power discharged from the mobile energy storage device to the charging / discharging system, over multiple predetermined periods. In a calendar where multiple predetermined periods are arranged, display data is generated to display a calendar screen on a display device that shows at least one of the charging-side power quantity information and the discharging-side power quantity information for each predetermined period. The display data is transmitted to the display device. A method for controlling a charging and discharging system.

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

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