Charging / discharging system and method for controlling the charging / discharging system

Abstract

To provide a charging / discharging system that can easily grasp a power exchange.SOLUTION: A charging / discharging system 10 performs charging / discharging with a vehicle power storage device 51 that is a power storage device included in a vehicle 50 in a prescribed supply area 1 to which power is supplied from a power system 60, and supplies power to a power load 20 in the supply area 1. The charging / discharging system 10 includes an acquisition unit 161 that acquires vehicle power information 164d indicating power flowing between the vehicle power storage device 51 and the charging / discharging system 10, a generation unit 162 that generates display data 164m for displaying, on a display device 41, a screen including a vehicle power figure 164i which indicates the magnitude of power indicated by the vehicle power information 164d, and a transmission unit 163 that transmits the display data 164m to the display device 41.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

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

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

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

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

[0006] A charging / discharging system according to one embodiment of the present invention is a charging / discharging system that charges and discharges between a vehicle power storage device, which is a power storage device possessed by a vehicle, in a specified supply area to which power is supplied from a power grid, and supplies power to power loads within the supply area, and is equipped with an acquisition unit that acquires vehicle power information indicating the power flowing between the vehicle power storage device and the charging / discharging system, a generation unit that generates display data for displaying on a display device a screen including a vehicle power graphic, which is a graphic indicating the magnitude of the power indicated by the vehicle power information, and a transmission unit that transmits the display data to the display device.

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

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

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

[0010] A charging / discharging system according to one embodiment of the present invention is a charging / discharging system that charges and discharges between a vehicle power storage device, which is a power storage device possessed by a vehicle, in a specified supply area to which power is supplied from a power grid, and supplies power to power loads within the supply area, and is equipped with an acquisition unit that acquires vehicle power information indicating the power flowing between the vehicle power storage device and the charging / discharging system, a generation unit that generates display data for displaying on a display device a screen including a vehicle power graphic, which is a graphic indicating the magnitude of the power indicated by the vehicle power information, and a transmission unit that transmits the display data to the display device.

[0011] According to this, the charging / discharging system generates display data for displaying on a display device a screen including a vehicle power graphic, which is a graphic indicating the amount of power flowing between the vehicle power storage device and the charging / discharging system, and transmits the display data to the display device. This allows the vehicle power graphic to be displayed on the display device, making it easier to visually (intuitively) grasp the amount of power flowing between the vehicle power storage device and the charging / discharging system. By transmitting display data for the screen including the vehicle power graphic to the display device in this way, the amount of power flowing between the vehicle power storage device and the charging / discharging system can be easily grasped, making it easy to grasp the exchange of power in the charging / discharging system.

[0012] The acquisition unit may acquire the vehicle power information including information indicating whether the power flowing between the vehicle power storage device and the charging / discharging system is charging power from the charging / discharging system to the vehicle power storage device, or discharging power from the vehicle power storage device to the charging / discharging system, and the generation unit may generate the display data for displaying on the display device a screen including the vehicle power graphic that further indicates whether the power indicated by the vehicle power information is charging power or discharging power.

[0013] According to this, the charging / discharging system generates display data for causing the display device to display a screen including a vehicle power graphic that further indicates whether the power flowing between the vehicle power storage device and the charging / discharging system is charging power or discharging power for the vehicle power storage device. By displaying the vehicle power graphic on the display device, it becomes easier to visually (intuitively) understand whether the power flowing between the vehicle power storage device and the charging / discharging system is charging power or discharging power for the vehicle power storage device (direction of current). In this way, by transmitting display data for the screen including the vehicle power graphic to the display device, it becomes easy to understand the direction of the current flowing between the vehicle power storage device and the charging / discharging system, and therefore the exchange of power in the charging / discharging system can be easily understood.

[0014] The generation unit may generate the display data for causing the display device to display a screen including the vehicle power graphic that indicates, by a scale, the magnitude of the power indicated by the vehicle power information.

[0015] According to this, the charging / discharging system generates display data for displaying on the display device a screen including a vehicle power graphic that indicates, with a scale, the amount of power flowing between the vehicle power storage device and the charging / discharging system. By displaying the vehicle power graphic on the display device, the amount of power flowing between the vehicle power storage device and the charging / discharging system can be easily grasped visually (intuitively) using the scale. By transmitting display data for the screen including the vehicle power graphic to the display device, the amount of power flowing between the vehicle power storage device and the charging / discharging system can be easily grasped, and thus the exchange of power in the charging / discharging system can be easily grasped.

[0016] The generation unit may determine whether or not the vehicle power storage device is connected to the charging / discharging system, and if it determines that the vehicle power storage device is not connected to the charging / discharging system, generate the display data for causing the display device to display a screen including the vehicle power graphic that is different from a screen that is displayed when it is determined that the vehicle power storage device is connected to the charging / discharging system.

[0017] According to this, when the charging / discharging system determines that the vehicle power storage device is not connected to the charging / discharging system, it generates display data for causing the display device to display a screen including a vehicle power graphic that is different from that displayed when it is determined that the vehicle power storage device is connected. In other words, when the vehicle power storage device is not connected to the charging / discharging system, the charging / discharging system generates display data for causing the display device to display a screen that indicates that the vehicle power storage device is not connected. This makes it possible to display the connection status of the vehicle power storage device to the charging / discharging system on the screen of the display device, making it easy to visually (intuitively) understand that even if charging / discharging between the charging / discharging system and the vehicle power storage device has stopped, this is not due to a malfunction of the equipment. Therefore, it is easy to understand the exchange of power in the charging / discharging system.

[0018] The acquisition unit may be configured to acquire vehicle selection information indicating that the vehicle power graphic displayed on the display device has been selected, and the generation unit may generate the display data for displaying on the display device a screen including information indicating an SOC (State Of Charge) of the vehicle power storage device when the acquisition unit acquires the vehicle selection information.

[0019] According to this, when the charging / discharging system acquires the vehicle selection information, it generates display data for causing the display device to display a screen including information indicating the SOC of the vehicle power storage device. As a result, the information indicating the SOC of the vehicle power storage device can also be displayed on the display device, making it possible to easily grasp the charging state of the vehicle power storage device and the exchange of power in the charging / discharging system.

[0020] The acquisition unit may further acquire at least one of power information: system power information indicating the power flowing between the power system and the charging / discharging system; generated power information indicating the power flowing between a power generation device and the charging / discharging system; stored power information indicating the power flowing between a storage device and the charging / discharging system; and load power information indicating the power consumption of the power load, and the generation unit may generate the display data for displaying on the display device a screen further including a power information graphic which is a graphic indicating the magnitude of the power indicated by the power information.

[0021] According to this, the charge / discharge system generates display data for displaying on the display device a screen further including a power information graphic, which is a graphic showing the amount of power indicated by at least one of power information including grid power information, generated power information, stored power information, and load power information. This allows the display device to display, in addition to the vehicle power graphic, a power information graphic showing the amount of power flowing in and out of the charge / discharge system, making it easier to visually (intuitively) understand the amount of power flowing in and out of the charge / discharge system. In this way, by transmitting display data for the screen further including the power information graphic to the display device, it becomes easy to understand the amount of power flowing in and out of the charge / discharge system, making it easy to understand the exchange of power in the charge / discharge system.

[0022] The generation unit may generate the display data for causing the display device to display a screen on which the vehicle electric power graphic and the electric power information graphic, each long in a predetermined direction, are arranged in a direction intersecting the predetermined direction.

[0023] When the vehicle power graphic and the power information graphic are long in a predetermined direction and are aligned in the predetermined direction (longitudinal direction), it becomes difficult to view the vehicle power graphic and the power information graphic all at once. Therefore, the charging / discharging system generates display data for displaying on a display device a screen in which the vehicle power graphic and the power information graphic are aligned in a direction intersecting the longitudinal direction. This makes it easier to visually (intuitively) grasp the vehicle power graphic and the power information graphic all at once. By transmitting display data for a screen in which the vehicle power graphic and the power information graphic are aligned in a direction intersecting the longitudinal direction to the display device, the vehicle power graphic and the power information graphic can be easily grasped, thereby making it easy to grasp the exchange of power in the charging / discharging system.

[0024] The acquisition unit may acquire a plurality of pieces of power information including at least one of the grid power information and the load power information, and the generation unit may generate the display data for causing the display device to display a screen in which at least one of a grid power diagram, which is a diagram indicating the magnitude of power indicated by the grid power information, and a load power diagram, which is a diagram indicating the magnitude of power indicated by the load power information, is placed at an end of the vehicle power diagram and the plurality of power information diagrams.

[0025] Generally, when information about the power grid is included among multiple pieces of information, it is easier to understand visually (intuitively) if the information about the power grid is located at the edge. The same is true for information about the power load. For this reason, the charge / discharge system generates display data for displaying on the display device a screen in which at least one of the grid power graphic and the load power graphic is located at the edge of the vehicle power graphic and the multiple power information graphics. This allows the display device to display a screen in which at least one of the information about the power grid (grid power graphic) and the information about the power load (load power graphic) is located at the edge, making it easier to understand the information visually (intuitively). Therefore, the exchange of power in the charge / discharge system can be easily understood.

[0026] The generation unit may generate the display data for displaying on the display device a screen including a vehicle power value, which is a numerical value indicating the magnitude of the power indicated by the vehicle power information, and a power information value, which is a numerical value indicating the magnitude of the power indicated by the power information, and on which the vehicle power value and the power information value are arranged vertically.

[0027] Generally, when multiple numerical values ​​are displayed on a screen, it is easier to compare the values ​​and perform calculations (mental arithmetic) when the values ​​are arranged vertically rather than horizontally. For this reason, the charge / discharge system generates display data for displaying on a display device a screen in which vehicle power values ​​and power information values ​​are arranged vertically. This allows the display device to display a screen in which vehicle power values ​​and power information values ​​are arranged vertically, making it easier to compare and perform calculations (mental arithmetic) between the vehicle power values ​​and the power information values. Therefore, it is easy to understand the exchange of power in the charge / discharge system.

[0028] The charging / discharging system is a charging / discharging system that charges and discharges power between a vehicle power storage device, which is a power storage device carried by a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to a power load within the supply area, and includes: an acquisition unit that acquires vehicle power information indicating the power flowing between the vehicle power storage device and the charging / discharging system; a generation unit that generates display data for causing a display device to display a screen including a vehicle power value, which is a numerical value indicating the magnitude of the power indicated by the vehicle power information; and a transmission unit that transmits the display data to the display device, wherein the acquisition unit further acquires at least one of power information: system power information indicating the power flowing between the power grid and the charging / discharging system; generated power information indicating the power flowing between a power generation device and the charging / discharging system; stored power information indicating the power flowing between the storage device and the charging / discharging system; and load power information indicating the power consumption of the power load, and the generation unit may generate the display data for causing the display device to display a screen including a power information value, which is a numerical value indicating the magnitude of the power indicated by the power information, and in which the vehicle power value and the power information value are arranged vertically.

[0029] According to this, the charge / discharge system generates display data for displaying on a display device a screen in which the vehicle power value and the power information value are arranged vertically, and transmits the display data to the display device. This allows the display device to display a screen in which the vehicle power value and the power information value are arranged vertically, making it easier to compare and calculate (mentally) the vehicle power value and the power information value. Therefore, the exchange of power in the charge / discharge system can be easily understood.

[0030] The generation unit may generate the display data for displaying on the display device a screen in which the vehicle power value and the power information value are arranged so that the decimal points of the vehicle power value and the power information value are vertically aligned.

[0031] Generally, when multiple numerical values ​​are arranged vertically and displayed on a screen, it is easier to compare the numerical values ​​and perform calculations (mental arithmetic) if the numerical values ​​are arranged so that their decimal points are vertically aligned. Therefore, the charging / discharging system generates display data for displaying on a display device a screen in which the vehicle power value and the power information value are arranged so that the decimal points of the vehicle power value and the power information value are vertically aligned. This allows the display device to display a screen in which the vehicle power value and the power information value are arranged so that the decimal points are vertically aligned, making it easier to compare and perform calculations (mental arithmetic) between the vehicle power value and the power information value. Therefore, the exchange of power in the charging / discharging system can be easily understood.

[0032] A control method for a charging / discharging system according to one embodiment of the present invention is a control method for a charging / discharging system that charges and discharges between a vehicle power storage device, which is a power storage device possessed by a vehicle, in a specified supply area to which power is supplied from a power grid, and supplies power to a power load within the supply area, the control method comprising the steps of: acquiring vehicle power information indicating the power flowing between the vehicle power storage device and the charging / discharging system; generating display data for displaying on a display device a screen including a vehicle power graphic, which is a graphic indicating the magnitude of the power indicated by the vehicle power information; and transmitting the display data to the display device.

[0033] According to this, the control method for a charging / discharging system generates display data for displaying on a display device a screen including a vehicle power graphic, which is a graphic indicating the amount of power flowing between a vehicle power storage device and the charging / discharging system, and transmits the display data to the display device. This allows the vehicle power graphic to be displayed on the display device, making it easier to visually (intuitively) grasp the amount of power flowing between the vehicle power storage device and the charging / discharging system. Thus, according to the control method for a charging / discharging system, transmitting display data for the screen including the vehicle power graphic to the display device makes it easy to grasp the amount of power flowing between the vehicle power storage device and the charging / discharging system, and therefore makes it easy to grasp the exchange of power in the charging / discharging system.

[0034] Hereinafter, with reference to the drawings, a charge / discharge system according to an embodiment of the present invention (including its modified examples), and a control method for the charge / discharge system will be described. The embodiments described below all show comprehensive or specific examples. The numerical values, components, the arrangement and connection of the components, the control processes, and the order of the control processes shown in the following embodiments are examples and are not intended to limit the present invention. Each drawing is a schematic diagram and is not necessarily an exact illustration. In each drawing, the same or similar components are assigned the same reference numerals.

[0035] (Embodiment) [1 Explanation of charging and discharging system 10] First, a general description will be given of the charge / discharge system 10. Fig. 1 is a diagram showing an outline of a remote monitoring system including a charge / discharge system 10 according to the present embodiment.

[0036] 1, the remote monitoring system includes a plurality of supply areas 1 (three in FIG. 1), a server device 30 capable of collecting information about the supply areas 1, a client device 40 capable of viewing the information about the supply areas 1, and a network N serving as a communication medium. This allows remote monitoring by displaying the information about the supply areas 1 on a display device 41 of the client device 40 via the network N (and the server device 30).

[0037] A supply area 1 is a predetermined site to which power is supplied from a power grid, and is divided into predetermined areas such as by consumer, facility, or building. In each supply area 1, a charge / discharge system 10 including a power conditioner 100 and a charger / discharger 200, and a power load 20 are arranged, and power is supplied from the charge / discharge system 10 to the power load 20. The power load 20 is a power load consumed by power consuming devices in buildings (offices, etc.) arranged in each supply area 1, or outdoor power consuming devices, etc.

[0038] The server device 30 includes a web server function and presents information obtained from the charging / discharging system 10 within the supply area 1 in response to access from the client device 40. The server device 30 may be realized by a general-purpose computer system such as a personal computer executing a program, or may be realized by a dedicated computer system.

[0039] The network N includes a public communication network N1, which is the Internet, and a carrier network N2 that realizes wireless communication according to a predetermined mobile communication standard. The public communication network N1 includes a general optical line, and the network N includes a dedicated line to which the server device 30 is connected. The carrier network N2 includes a base station BS, and the client device 40 can communicate with the server device 30 from the base station BS via the network N. An access point AP is connected to the public communication network N1, and the client device 40 can communicate with the server device 30 from the access point AP via the network N.

[0040] The client device 40 may be a desktop or laptop personal computer, or may be a so-called smartphone or tablet communication terminal. The client device 40 has a display device 41 such as a liquid crystal display, an input device 42 such as a keyboard and mouse or a touch panel, a control device, a storage unit (memory), a communication device, etc. The storage unit stores client programs including a web browser that are read and executed by the control device. A user who logs in using a login screen displayed on the web browser of the client device 40 can access information about the system in which the user is involved, which is provided by the server device 30.

[0041] Next, the charging / discharging system 10 will be described in detail. Fig. 2 is a perspective view showing the configuration of the charging / discharging system 10 according to this embodiment. Specifically, Fig. 2 is an image diagram showing the configurations of the power conditioner 100 and the charger / discharger 200 provided in the charging / discharging system 10, and a state in which the vehicle power storage device 51 of the vehicle 50 is connected to the charger / discharger 200. Fig. 3 is a block diagram showing the functional configuration of the charging / discharging system 10 according to this embodiment. Specifically, Fig. 3 shows a configuration in which the charging / discharging system 10 is connected to the vehicle power storage device 51 of the vehicle 50, the power grid 60, the power generation device 70, the power storage device 80, and the power load 20 within the supply area 1.

[0042] The charging / discharging system 10 is a system that charges / discharges power between a vehicle power storage device 51, which is a power storage device included in a vehicle 50, in a predetermined supply area 1 to which power is supplied from a power grid 60, and supplies the power to a power load 20 within the supply area 1. As shown in FIGS. 2 and 3, the charging / discharging system 10 includes a power conditioner 100 and a charger / discharger 200. Although five charger / dischargers 200 are illustrated in FIG. 2 and only one charger / discharger 200 is illustrated in FIG. 3 for ease of explanation, the number of charger / dischargers 200 included in the charging / discharging system 10 is not particularly limited. The number of power conditioners 100 included in the charging / discharging system 10 is also not particularly limited.

[0043] That is, the charging / discharging system 10 may be arranged in a centralized charging / discharging station in which parking spaces S1 to S5 are adjacent to each other, as shown in FIG. 2, or in a distributed charging / discharging station (not shown) in which parking spaces are distributed (for example, on different floors of a building). In FIG. 2, a charger / discharger 200 is arranged in each of the parking spaces (S1, S2, ...), but this is not limited to this configuration, and a single charger / discharger 200 may be installed in a single parking space. Multiple vehicles 50 (multiple vehicle power storage devices 51) may be connected to one charger / discharger 200. In other words, multiple vehicles 50 (multiple vehicle power storage devices 51) may be connected to the charging / discharging system 10, or only one vehicle 50 (one vehicle power storage device 51) may be connected. The charging / discharging station in which the charging / discharging system 10 is arranged may be provided in a public place such as a public parking lot, or may be provided on the premises of a company or individual.

[0044] As shown in Fig. 3 , the power conditioner 100 is connected to the charger / discharger 200, the power system 60, the power generator 70, the power storage device 80, and the power load 20, and exchanges power with them. That is, the power conditioner 100 receives power from the charger / discharger 200, the power system 60, the power generator 70, and the power storage device 80, and supplies power to the charger / discharger 200, the power system 60, the power storage device 80, and the power load 20. As a result, the power system 60 and the power generator 70 supply power to the power load 20, the power storage device 80, and the vehicle power storage device 51. The power storage device 80 supplies power to the power load 20 and the vehicle power storage device 51. The vehicle power storage device 51 supplies power to the power load 20.

[0045] The power system 60 is, for example, a commercial power system owned by an electric power company, and AC power generated by a system power source 61 such as a thermal power plant flows through the power system 60. The power system 60 supplies the AC power to the power conditioner 100. The power system 60 is not limited to a commercial power system, and may be any power system that is provided outside the charge / discharge system 10 and supplies power to the charge / discharge system 10, and may be a power system installed on a remote island or in a specified area that is not connected to a commercial power system.

[0046] The power generation device 70 is a power generation device installed within the supply area 1, and is a distributed power generation device such as a solar power generation facility, a wind power generation facility, a diesel generator, a small gas turbine generator, a fuel cell, a micro hydroelectric generator, or a binary power generation facility. The power generation device 70 supplies the generated power to the power conditioner 100.

[0047] The power storage device 80 is a power supply device that can charge with electricity from an external source and discharge electricity to the outside. The power storage device 80 charges with and discharges power via the power conditioner 100. Specifically, the power storage device 80 has a plurality of power storage elements connected in series and / or parallel. The power storage elements are secondary batteries (single cells) that can charge with and discharge electricity, and are, for example, non-aqueous electrolyte secondary batteries such as lithium-ion secondary batteries. The power storage elements are not limited to non-aqueous electrolyte secondary batteries, and may be secondary batteries other than non-aqueous electrolyte secondary batteries, capacitors, primary batteries, batteries using a solid electrolyte, or the like.

[0048] The power load 20 is a power load consumed within the supply area 1, and includes specific loads 21 and 22 that are used even in emergencies such as power outages, and a general load 23 that is used normally. The specific load 21 is a power load used for elevators or commercial air conditioning in facilities such as offices, and the specific load 22 is a lighting load used for lighting or outlets in facilities such as offices. The general load 23 is a power load other than the specific loads 21 and 22, such as a load for operating home appliances or machinery in a factory.

[0049] 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.

[0050] The first converter circuit 110 is a power converter (DC / DC converter) that performs conversion between DC and DC power, and is connected to the power generation device 70 to boost and output the output voltage (DC) of the power generation device 70. The first converter circuit 110 may be a boost chopper. The second converter circuit 120 is a bidirectional power converter (bidirectional DC / DC converter) that performs conversion between DC and DC power, and is connected to the power storage device 80 to discharge and charge the power storage device 80. The second converter circuit 120 may be a bidirectional chopper. The power storage device 80 can store surplus power from the power generation device 70 and power from the power grid 60 via the second converter circuit 120. When the amount of power generated by the power generation device 70 is insufficient, the power storage device 80 can discharge and make up for the shortage of power generation via the second converter circuit 120. The bidirectional inverter circuit 130 is a bidirectional conversion circuit that selectively performs inverse conversion (inversion) to convert DC power to AC power and forward conversion (conversion) to convert AC power to DC power. The bidirectional inverter circuit 130 is connected to the first converter circuit 110, the second converter circuit 120, and the power grid 60.

[0051] The switching circuit 140 is connected to a three-phase specific load 21 and a single-phase specific load 22 via a transformer, and is a circuit that switches contacts to supply power to the specific loads 21 and 22 in an emergency such as a power outage in the power grid 60. The switching circuit 140 is configured to normally connect contact A to the power line so that power from the power grid 60 can be supplied to the specific loads 21 and 22, etc. In an emergency, the switching circuit 140 switches to contact B so that power can be supplied from the power generation device 70 and / or the power storage device 80 to the specific loads 21 and 22 via the bidirectional inverter circuit 130. As a result, backup power is supplied to the specific loads 21 and 22 from at least one of the power generation device 70, the power storage device 80, and the charger / discharger 200 in the event of a power outage in the power grid 60.

[0052] The control unit 150 is a control device that controls various devices within the power conditioner 100. The power conditioner 100 further includes a current detection unit and a voltage detection unit (not shown). The current detection unit is, for example, a through-hole sensor that detects the current flowing through the power line within the power conditioner 100. The voltage detection unit detects the voltage of the power line within the power conditioner 100. The control unit 150 has a function of calculating and acquiring the power (active power) and amount of power flowing in and out of the power line based on the detected current and voltage. The control unit 150 also has a function of calculating received power from the received current and system voltage detected by an external measuring device (external transducer) 62 installed at the power receiving point of the power grid 60, or acquiring the received power calculated by the external measuring device 62. In this way, the control unit 150 is configured to be able to acquire the power and amount of power of the current flowing between the charging / discharging system 10 and the power grid 60, the power generation device 70, the power storage device 80, and the power load 20. The control unit 150 may be configured to be able to acquire information other than the above, such as the SOC (State Of Charge) of the power storage device 80, and the power and amount of power of the current flowing between the power conditioner 100 and the charger / discharger 200.

[0053] The first communication unit 160 is a communication board such as a network interface card (NIC) and is capable of communicating with external devices. The first communication unit 160 is communicably connected to the control unit 150 via a communication line (not shown) and acquires information from the control unit 150. The first communication unit 160 is communicably connected to a second communication unit 230 of the charger / discharger 200 (described later) via a communication line or by wireless communication and acquires information from the second communication unit 230 as well. The first communication unit 160 generates display data using the acquired information and transmits it to the client device 40 (display device 41). The first communication unit 160 will be described in detail later.

[0054] The power conditioner 100 may be a three-phase grid-connected power storage system that can supply power to a wide range of power loads. For example, by using a so-called power conditioner with a storage battery that is integrally provided with the power storage device 80 as the power conditioner 100, space can be saved.

[0055] Charger / discharger 200 is a charging / discharging station that is connected to vehicle power storage device 51, which is a power storage device included in vehicle 50, and charges / discharges between vehicle power storage device 51 and charge / discharge station 200. Charger / discharger 200 is also connected to power load 20 via power conditioner 100, and charges vehicle power storage device 51 under normal circumstances, and discharges vehicle power storage device 51 under emergency circumstances to supply power to power load 20, such as specific loads 21 and 22.

[0056] The vehicle 50 is a vehicle (mobile object) such as an electric vehicle (EV) or a plug-in hybrid electric vehicle (PHEV), and the vehicle power storage device 51 is a battery mounted thereon. The vehicle power storage device 51 is a power storage device (battery) that supplies power to the vehicle 50 and drives the vehicle 50. Similar to the power storage device 80, the vehicle power storage device 51 has a plurality of power storage elements (lithium ion secondary batteries, etc.) connected in series and / or parallel.

[0057] The charger / discharger 200 includes a charge / discharge unit 210 , a control unit 220 , and a second communication unit 230 .

[0058] The charge / discharge unit 210 is a bidirectional conversion circuit that selectively performs forward conversion (conversion) to convert AC power to DC power and inverse conversion (inversion) to convert DC power to AC power. The charge / discharge unit 210 converts AC power from the power conditioner 100 into DC power and supplies it to the vehicle power storage device 51 to charge the vehicle power storage device 51. The charge / discharge unit 210 converts DC power discharged from the vehicle power storage device 51 into AC power and supplies it to the power load 20 etc. via the power conditioner 100.

[0059] The control unit 220 controls the charge / discharge unit 210 by issuing commands to the charge / discharge unit 210. The control unit 220 has a function of calculating (estimating) and acquiring the power and amount of power when the vehicle power storage device 51 is being charged and when it is being discharged, based on the output of the charge / discharge unit 210. The control unit 220 may also have a function of acquiring and monitoring the SOC of the vehicle power storage device 51. The control unit 220 may have a storage unit (memory), a display panel, an operation unit, etc.

[0060] The second communication unit 230 is a communication board such as a network interface card (NIC) that can communicate with the first communication unit 160 of the power conditioner 100 via a communication line or by wireless communication. The second communication unit 230 acquires various information from the control unit 220 and transmits it to the first communication unit 160. Specifically, the second communication unit 230 acquires, from the control unit 220, information on the power and amount of power charged and discharged between the vehicle power storage device 51 and the charge / discharge unit 210 (charge / discharge system 10), and transmits it to the first communication unit 160. In this way, in the present embodiment, the first communication unit 160 functions as a parent device, and the second communication unit 230 functions as a child device.

[0061] 2 , when a plurality of chargers / dischargers 200 are provided in the charging / discharging system 10, a plurality of second communication units 230 possessed by the plurality of chargers / dischargers 200 are configured to be able to communicate with the first communication unit 160, and information is transmitted from the plurality of second communication units 230 to the first communication unit 160. The second communication unit 230 may be configured to be able to communicate with other second communication units 230 possessed by other chargers / dischargers 200 via wire or wirelessly, and may be configured to acquire information from the other second communication units 230 and then transmit the information to the first communication unit 160.

[0062] [2. Description of the first communication unit 160] Next, the first communication unit 160 included in the power conditioner 100 of the charge / discharge system 10 will be described in detail. FIG. 4 is a block diagram showing the functional configuration of the first communication unit 160 according to the present embodiment. FIG. 4 shows a configuration in which the first communication unit 160 acquires information from the control unit 150, the second communication unit 230, and the client device 40 (display device 41), and transmits the information to the client device 40 (display device 41). FIG. 5 is a diagram showing an example of display data 164m displayed on the display device 41 according to the present embodiment. In FIG. 5, a monitor of a personal computer is shown as an example of the display device 41, but a touch panel of a smartphone or a tablet-type communication terminal may also be used.

[0063] As shown in FIG. 4, the first communication unit 160 includes an acquisition unit 161, a generation unit 162, a transmission unit 163, and a storage unit 164.

[0064] The acquisition unit 161 acquires various types of information such as grid power information 164a, generated power information 164b, stored power information 164c, vehicle power information 164d, load power information 164e, stored power SOC information 164k, and vehicle SOC information 164l. The acquisition unit 161 acquires the grid power information 164a, generated power information 164b, stored power information 164c, load power information 164e, and stored SOC information 164k from the control unit 150 of the power conditioner 100. The acquisition unit 161 acquires the vehicle power information 164d and vehicle SOC information 164l from the second communication unit 230 of the charger / discharger 200. The acquisition unit 161 writes the acquired various types of information into the storage unit 164 for storage.

[0065] The grid power information 164a is information indicating the power flowing between the power grid 60 and the charging / discharging system 10. The grid power information 164a includes information indicating the magnitude (power value) of the power flowing between the power grid 60 and the charging / discharging system 10. Furthermore, the grid power information 164a includes information indicating whether the power flowing between the power grid 60 and the charging / discharging system 10 is forward flow power (purchased power) flowing from the power grid 60 to the charging / discharging system 10, or reverse flow power (sold power) flowing from the charging / discharging system 10 to the power grid 60. In other words, the grid power information 164a includes information such as the magnitude (power value) of the power of the current flowing between the power grid 60 and the charging / discharging system 10 and the direction of the current flow (positive, negative, etc.).

[0066] The generated power information 164b is information indicating the power flowing between the power generation device 70 and the charge / discharge system 10. The generated power information 164b includes information indicating the power supplied from the power generation device 70 to the charge / discharge system 10. That is, the generated power information 164b includes information such as the magnitude (power value) of the power generated by the power generation device 70 and supplied to the charge / discharge system 10. In this embodiment, power is not supplied from the charge / discharge system 10 to the power generation device 70. However, a configuration may also be possible in which, for example, when the power generated by the power generation device 70 is small, power is supplied from the charge / discharge system 10 to the power generation device 70 and the power is consumed by the power generation device 70. In this case, the generated power information 164b includes information such as the magnitude (power value) of the power of the current flowing between the power generation device 70 and the charge / discharge system 10 and the direction of the current flow (positive, negative, etc.).

[0067] The stored power information 164c is information indicating the power flowing between the power storage device 80 and the charge / discharge system 10. The stored power information 164c includes information indicating the magnitude (power value) of the power flowing between the power storage device 80 and the charge / discharge system 10. Furthermore, the stored power information 164c includes information indicating whether the power flowing between the power storage device 80 and the charge / discharge system 10 is charging power from the charge / discharge system 10 to the power storage device 80, or discharging power from the power storage device 80 to the charge / discharge system 10. In other words, the stored power information 164c includes information such as the magnitude (power value) of the power of the current flowing between the power storage device 80 and the charge / discharge system 10 and the direction of the current flow (positive, negative, etc.).

[0068] The vehicle power information 164d is information indicating the power flowing between the vehicle power storage device 51 and the charging / discharging system 10. The vehicle power information 164d includes information indicating the magnitude (power value) of the power flowing between the vehicle power storage device 51 and the charging / discharging system 10. Furthermore, the vehicle power information 164d includes information indicating whether the power flowing between the vehicle power storage device 51 and the charging / discharging system 10 is charging power from the charging / discharging system 10 to the vehicle power storage device 51, or discharging power from the vehicle power storage device 51 to the charging / discharging system 10. In other words, the vehicle power information 164d includes information such as the magnitude (power value) of the power of the current flowing between the vehicle power storage device 51 and the charging / discharging system 10 and the direction of the current flow (positive, negative, etc.).

[0069] The load power information 164e is information indicating the power consumption of the power load 20. The load power information 164e includes information indicating the power supplied from the charging / discharging system 10 to the power load 20. In other words, the load power information 164e includes information such as the magnitude (power value) of the power consumed by the power load 20 (specific loads 21, 22 and general load 23).

[0070] The power storage SOC information 164k is information indicating the SOC of the power storage device 80. The power storage SOC information 164k includes information such as a graphic indicating the magnitude of the SOC of the power storage device 80 and the value of the SOC of the power storage device 80. The vehicle SOC information 164l is information indicating the SOC of the vehicle power storage device 51. The vehicle SOC information 164l includes information such as a graphic indicating the magnitude of the SOC of the vehicle power storage device 51 and the value of the SOC of the vehicle power storage device 51.

[0071] Furthermore, the acquisition unit 161 is configured to be able to acquire power storage selection information 41a and vehicle selection information 41b. The power storage selection information 41a is information indicating that the power storage power graphic 164h displayed on the display device 41 of the client device 40 has been selected. The vehicle selection information 41b is information indicating that the vehicle power graphic 164i displayed on the display device 41 of the client device 40 has been selected. The acquisition unit 161 acquires the power storage selection information 41a and the vehicle selection information 41b from the client device 40 (display device 41). The acquisition unit 161 writes and stores the acquired power storage selection information 41a and vehicle selection information 41b in the storage unit 164.

[0072] Specifically, when the user selects (e.g., clicks on) the storage power graphic 164h displayed on the display device 41 of the client device 40, power storage selection information 41a indicating the selection is transmitted from the client device 40 (display device 41) to the acquisition unit 161. The acquisition unit 161 acquires the power storage selection information 41a transmitted from the client device 40 (display device 41). Similarly, when the user selects (e.g., clicks on) the vehicle power graphic 164i displayed on the display device 41 of the client device 40, vehicle selection information 41b indicating the selection is transmitted from the client device 40 (display device 41) to the acquisition unit 161. The acquisition unit 161 acquires the vehicle selection information 41b transmitted from the client device 40 (display device 41).

[0073] 5, the generation unit 162 generates display data 164m for displaying a screen including various pieces of information on the display device 41 of the client device 40. Specifically, the generation unit 162 generates a grid power graphic 164f, a generated power graphic 164g, a stored power graphic 164h, a vehicle power graphic 164i, a load power graphic 164j, and the like, and generates display data 164m for displaying a screen including these pieces of information (graphics) on the display device 41.

[0074] More specifically, generation unit 162 reads out from storage unit 164 grid power information 164a, generated power information 164b, stored power information 164c, vehicle power information 164d, and load power information 164e that acquisition unit 161 has stored in storage unit 164. Then, generation unit 162 generates grid power graphic 164f from grid power information 164a, generates generated power graphic 164g from generated power information 164b, generates stored power graphic 164h from stored power information 164c, generates vehicle power graphic 164i from vehicle power information 164d, and generates load power graphic 164j from load power information 164e. Generation unit 162 stores the generated information in storage unit 164 or updates the information stored in storage unit 164. Furthermore, the generation unit 162 reads out this information from the storage unit 164, and generates display data 164m for displaying a screen including a grid power graphic 164f, a generated power graphic 164g, a stored power graphic 164h, a vehicle power graphic 164i, and a load power graphic 164j on the display device 41. The generation unit 162 writes the generated display data 164m into the storage unit 164 for storage.

[0075] The grid power graphic 164f is a graphic that shows the magnitude of the power indicated by the grid power information 164a. The grid power graphic 164f further shows whether the power indicated by the grid power information 164a is forward flow power (purchased power) flowing from the power grid 60 to the charging / discharging system 10, or reverse flow power (sold power) flowing from the charging / discharging system 10 to the power grid 60. The grid power graphic 164f shows the magnitude of the power indicated by the grid power information 164a with a scale.

[0076] As shown in FIG. 5 , in this embodiment, the grid power graphic 164f has ten scales arranged horizontally (horizontally), with the five scales on the left indicating the magnitude of power when purchasing power and the five scales on the right indicating the magnitude of power when selling power. When purchasing power, the grid power graphic 164f is displayed so that the scales increase from the rightmost scale to the left among the five scales on the left, and when selling power, the scales increase from the leftmost scale to the right among the five scales on the right. The grid power graphic 164f has a character display for "BUY" indicating power purchase to the left of the five scales on the left, and a character display for "SELL" indicating power sale to the right of the five scales on the right. The grid power graphic 164f has a graphic representing the power grid 60 to the left of the character display for "BUY." FIG. 5 illustrates a state in which no power flows between the power grid 60 and the charging / discharging system 10 (i.e., neither power purchase nor power sale occurs).

[0077] The generated power graphic 164g is a graphic that indicates the magnitude of the power indicated by the generated power information 164b. The generated power graphic 164g uses a scale to indicate the magnitude of the power indicated by the generated power information 164b. In this embodiment, the generated power graphic 164g has five scales arranged horizontally (horizontally) on the right side, and during power generation, the five scales are displayed so that the scales increase from the leftmost scale to the right. The generated power graphic 164g has the word "STOP" on the left side, indicating that power generation has been stopped, and the word "ON" on the right side of the five scales on the right side, indicating that power generation is being performed. The generated power graphic 164g has a graphic representing the power generation device 70 to the left of the "STOP" character. In FIG. 5, the scale has progressed to the fourth scale, indicating that the power generation device 70 is generating a relatively large amount of power.

[0078] The stored power graphic 164h is a graphic that indicates the magnitude of the power indicated by the stored power information 164c. The stored power graphic 164h further indicates whether the power indicated by the stored power information 164c is charging power from the charging / discharging system 10 to the power storage device 80, or discharging power from the power storage device 80 to the charging / discharging system 10. The stored power graphic 164h indicates the magnitude of the power indicated by the stored power information 164c with a scale.

[0079] In this embodiment, the stored power graphic 164h has ten scales arranged in the left-right direction (horizontal direction), with the five scales on the left indicating the magnitude of power during charging and the five scales on the right indicating the magnitude of power during discharging. The stored power graphic 164h is displayed such that, during charging, the scales increase from the rightmost scale of the five scales on the left to the left, and during discharging, the scales increase from the leftmost scale of the five scales on the right to the right. The stored power graphic 164h has a character display "CHARGE" indicating charging to the left of the five scales on the left, and a character display "DISCHARGE" indicating discharging to the right of the five scales on the right. The stored power graphic 164h has a graphic representing the power storage device 80 to the left of the character display "CHARGE." In FIG. 5, the scale on the left has progressed to the first scale, indicating that the power storage device 80 is slightly charged.

[0080] The vehicle power graphic 164i is a graphic that indicates the magnitude of the power indicated by the vehicle power information 164d. The vehicle power graphic 164i further indicates whether the power indicated by the vehicle power information 164d is charging power from the charging / discharging system 10 to the vehicle power storage device 51, or discharging power from the vehicle power storage device 51 to the charging / discharging system 10. The vehicle power graphic 164i indicates the magnitude of the power indicated by the vehicle power information 164d with a scale.

[0081] In this embodiment, the vehicle power graphic 164i has ten scales arranged in the left-right direction (horizontal direction), with the five scales on the left side indicating the magnitude of power during charging and the five scales on the right side indicating the magnitude of power during discharging. The vehicle power graphic 164i is displayed so that during charging, the scales increase from the rightmost scale of the five scales on the left side to the left, and during discharging, the scales increase from the leftmost scale of the five scales on the right side to the right. The vehicle power graphic 164i has a character display "charge" indicating charging to the left of the five scales on the left side, and a character display "discharge" indicating discharging to the right of the five scales on the right side. The vehicle power graphic 164i has a graphic representing the vehicle power storage device 51 to the left of the character display "charge." FIG. 5 illustrates a state in which no power flows between the vehicle power storage device 51 and the charging / discharging system 10 (neither charging nor discharging is occurring). The solid line representing the vehicle power storage device 51 also indicates that the vehicle power storage device 51 is connected to the charging / discharging system 10.

[0082] The load power graphic 164j is a graphic that indicates the magnitude of the power indicated by the load power information 164e. The load power graphic 164j uses a scale to indicate the magnitude of the power indicated by the load power information 164e. In this embodiment, the load power graphic 164j has five scales arranged horizontally (horizontally) on the left side, and when power is being consumed, the five scales are displayed so that the scales increase from the rightmost scale to the left. The load power graphic 164j has the character "NO" displayed on the right side, indicating no power consumption, and the character "CONSUMPTED" displayed to the left of the five scales on the left side, indicating power consumption. The load power graphic 164j has a graphic that indicates the power load 20 to the left of the character "CONSUMPTED". In FIG. 5, the scale has progressed to the third scale, indicating that a certain amount of power is being consumed by the power load 20.

[0083] The generation unit 162 generates display data 164m for displaying on the display device 41 a screen further including information indicating the power values ​​indicated by the grid power information 164a, the generated power information 164b, the stored power information 164c, the vehicle power information 164d, and the load power information 164e.

[0084] Specifically, the power value indicated by the grid power information 164a (the value of the power flowing between the power grid 60 and the charge / discharge system 10) is displayed at a position adjacent to (to the right of) the grid power graphic 164f. In FIG. 5, "0.00" kW is displayed. The power value indicated by the generated power information 164b (the value of the power supplied from the power generation device 70 to the charge / discharge system 10) is displayed at a position adjacent to (to the right of) the generated power graphic 164g. In FIG. 5, "4.00" kW is displayed. The power value indicated by the stored power information 164c (the value of the power flowing between the power storage device 80 and the charge / discharge system 10) is displayed at a position adjacent to (to the right of) the stored power graphic 164h. Although "1.00" kW is displayed in FIG. 5, it may also be displayed as "-1.00" kW because the scale is displayed on the left.

[0085] The power value indicated by vehicle power information 164d (the value of the power flowing between vehicle power storage device 51 and charging / discharging system 10) is displayed in a position adjacent to (to the right of) vehicle power graphic 164i. In FIG. 5, "0.00" kW is displayed. The power value indicated by load power information 164e (the value of the power supplied from charging / discharging system 10 to power load 20) is displayed in a position adjacent to (to the right of) load power graphic 164j. In FIG. 5, "3.00" kW is displayed, but since the scale is displayed on the left, it may also be displayed as "-3.00" kW.

[0086] In this embodiment, the grid power information 164a, the generated power information 164b, the stored power information 164c, and the load power information 164e are also referred to as power information. In other words, the acquisition unit 161 acquires at least one of the grid power information 164a, the generated power information 164b, the stored power information 164c, and the load power information 164e in addition to the vehicle power information 164d. The acquisition unit 161 may also acquire a plurality of pieces of power information including at least one of the grid power information 164a and the load power information 164e. The generation unit 162 may generate display data 164m for displaying on the display device 41 a screen including, in addition to the vehicle power graphic 164i, a power information graphic that indicates the magnitude of the power indicated by the power information. The power information graphic is the grid power graphic 164f, the generated power graphic 164g, the stored power graphic 164h, or the load power graphic 164j.

[0087] The generation unit 162 generates display data 164m for displaying on the display device 41 a screen on which a vehicle power graphic 164i and a power information graphic that are long in a predetermined direction are arranged in a direction intersecting the predetermined direction. In this embodiment, the vehicle power graphic 164i and the power information graphics (grid power graphic 164f, generated power graphic 164g, stored power graphic 164h, and load power graphic 164j) are horizontally long in the predetermined direction (left-right direction, horizontal direction) and are arranged in a direction intersecting the predetermined direction (up-down direction, vertical direction).

[0088] The generation unit 162 generates display data 164m for causing the display device 41 to display a screen in which at least one of the grid power graphic 164f and the load power graphic 164j is arranged at the end of the vehicle power graphic 164i and the plurality of power information graphics. In this embodiment, both the grid power graphic 164f and the load power graphic 164j are arranged at both end portions of the vehicle power graphic 164i and the plurality of power information graphics (the grid power graphic 164f, the generated power graphic 164g, the stored power graphic 164h, and the load power graphic 164j). Specifically, the grid power graphic 164f is arranged at the top, and the load power graphic 164j is arranged at the bottom. In this embodiment, the grid power graphic 164f, the generated power graphic 164g, the stored power graphic 164h, the vehicle power graphic 164i, and the load power graphic 164j are arranged in a vertical line from top to bottom.

[0089] The generation unit 162 generates display data 164m for displaying on the display device 41 a screen on which the vehicle power value and the power information value are vertically arranged, the display data including a vehicle power value that is a numerical value indicating the magnitude of the power indicated by the vehicle power information 164d and a power information value that is a numerical value indicating the magnitude of the power indicated by the power information. Specifically, the generation unit 162 generates display data 164m for displaying on the display device 41 a screen on which the vehicle power value and the power information value are vertically arranged so that the decimal points of the vehicle power value and the power information value are vertically aligned. The power information value is a numerical value indicating the magnitude of the power indicated by the grid power information 164a, the generated power information 164b, the stored power information 164c, or the load power information 164e. In this embodiment, from top to bottom, numerical values ​​indicating the magnitude of power indicated by system power information 164a, generated power information 164b, stored power information 164c, vehicle power information 164d, and load power information 164e are arranged vertically with the decimal points aligned vertically.

[0090] The generation unit 162 determines whether or not the vehicle power storage device 51 is connected to the charging / discharging system 10. When the generation unit 162 determines that the vehicle power storage device 51 is not connected to the charging / discharging system 10, the generation unit 162 generates display data 164m for causing the display device 41 to display a screen including a vehicle power graphic 164i that is different from that when the generation unit 162 determines that the vehicle power storage device 51 is connected to the charging / discharging system 10.

[0091] The generation unit 162 generates display data 164m for causing the display device 41 to display a screen including at least one of the power storage SOC information 164k and the vehicle SOC information 164l. Specifically, when the acquisition unit 161 acquires the power storage selection information 41a, the generation unit 162 generates display data 164m for causing the display device 41 to display a screen including information indicating the SOC of the power storage device 80 (power storage SOC information 164k). When the acquisition unit 161 acquires the vehicle selection information 41b, the generation unit 162 generates display data 164m for causing the display device 41 to display a screen including information indicating the SOC of the vehicle power storage device 51 (vehicle SOC information 164l).

[0092] The process by which the generation unit 162 generates the display data 164m will be described in detail later.

[0093] The transmission unit 163 transmits the display data 164m to the display device 41. The transmission unit 163 reads and acquires the display data 164m generated by the generation unit 162 and stored in the storage unit 164 from the storage unit 164, and transmits the display data 164m to the client device 40 (display device 41). As a result, the display data 164m is displayed on the display device 41 of the client device 40, as shown in FIG.

[0094] The storage unit 164 is a memory that stores the data acquired by the acquisition unit 161, as well as the graphic data and display data 164m generated by the generation unit 162. Specifically, the storage unit 164 stores grid power information 164a, generated power information 164b, stored power information 164c, vehicle power information 164d, load power information 164e, a grid power graphic 164f, a generated power graphic 164g, a stored power graphic 164h, a vehicle power graphic 164i, a load power graphic 164j, stored power SOC information 164k, vehicle SOC information 164l, and display data 164m.

[0095] As described above, various pieces of information required for the generation unit 162 to generate the display data 164m are stored in the storage unit 164. This information may be stored in advance in the storage unit 164, information acquired by the acquisition unit 161 may be written and stored in the storage unit 164, or information generated by the generation unit 162 may be written and stored in the storage unit 164. That is, the generation unit 162 reads information from the storage unit 164 to generate new information, and writes and stores the generated information in the storage unit 164. The generation unit 162 may acquire information from a processing unit other than the storage unit 164 (such as an input from a user). The storage unit 164 may store data other than the above that is required for the generation unit 162 to generate the display data 164m. When any of these pieces of data are changed in the storage unit 164, the data is updated each time, or the data may be accumulated.

[0096] [3. Explanation of the processing flow of the charging / discharging system 10] Next, the process performed by the charge / discharge system 10 (the control method for the charge / discharge system 10) will be described. Fig. 6 is a flowchart showing the process performed by the charge / discharge system 10 according to this embodiment (the control method for the charge / discharge system). Fig. 6 shows the process performed by each processing unit of the first communication unit 160 included in the power conditioner 100 of the charge / discharge system 10.

[0097] 6, first, the acquisition unit 161 acquires various types of information (S102). Specifically, the acquisition unit 161 acquires grid power information 164a, generated power information 164b, stored power information 164c, vehicle power information 164d, load power information 164e, stored power SOC information 164k, and vehicle SOC information 164l, etc. Details of the information acquired by the acquisition unit 161 are as described above, and therefore will not be described again.

[0098] Then, the generation unit 162 generates display data 164m using the information acquired by the acquisition unit 161 (S104). Specifically, the generation unit 162 generates display data 164m for displaying a screen including a grid power graphic 164f, a generated power graphic 164g, a stored power graphic 164h, a vehicle power graphic 164i, and a load power graphic 164j on the display device 41. The generation unit 162 generates display data 164m for displaying a screen further including information indicating the power values ​​indicated by the grid power information 164a, the generated power information 164b, the stored power information 164c, the vehicle power information 164d, and the load power information 164e on the display device 41. The details of each piece of information are as described above, and therefore will not be described again. A detailed description of the process by which the generation unit 162 generates the display data 164m will be given later.

[0099] 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).

[0100] Thereafter, when the acquisition unit 161 acquires the power storage selection information 41a or the vehicle selection information 41b, the generation unit 162 performs a selection information acquisition process (S108). The selection information acquisition process performed by the generation unit 162 will be described in detail later.

[0101] In this manner, the process (the method for controlling the charge / discharge system) performed by the charge / discharge system 10 (the first communication unit 160) is completed.

[0102] Next, the process (S104 in FIG. 6) of generating the display data 164m by the generation unit 162 will be described in detail. Fig. 7 is a flowchart showing the process of generating the display data 164m by the generation unit 162 of the first communication unit 160 according to the present embodiment.

[0103] The generating unit 162 generates display data 164m for displaying the following screen on the display device 41, as shown in FIG.

[0104] First, the generation unit 162 generates and arranges a grid power graphic 164f, a generated power graphic 164g, a stored power graphic 164h, a vehicle power graphic 164i, and a load power graphic 164j (S202). The details of the grid power graphic 164f, the generated power graphic 164g, the stored power graphic 164h, the vehicle power graphic 164i, and the load power graphic 164j are as described above, and therefore will not be described again.

[0105] Specifically, the generation unit 162 arranges the grid power information 164a (power information graphic), the generated power information 164b (power information graphic), the stored power information 164c (power information graphic), the vehicle power information 164d, and the load power information 164e (power information graphic) so that they extend in the left-right direction (horizontal direction, a predetermined direction). The generation unit 162 then arranges the vehicle power graphic 164i and the multiple power information graphics in the up-down direction (vertical direction, a direction intersecting the predetermined direction). At this time, the generation unit 162 arranges at least one of the grid power graphic 164f and the load power graphic 164j at the end of the vehicle power graphic 164i and the multiple power information graphics. In this embodiment, the generation unit 162 arranges the grid power graphic 164f at the top and the load power graphic 164j at the bottom.

[0106] Furthermore, the generation unit 162 arranges the power values ​​indicated by the grid power information 164a, the generated power information 164b, the stored power information 164c, the vehicle power information 164d, and the load power information 164e (S204). The details of the power values ​​indicated by the grid power information 164a, the generated power information 164b, the stored power information 164c, the vehicle power information 164d, and the load power information 164e are as described above, and therefore will not be described again.

[0107] Specifically, the generation unit 162 arranges the grid power information 164a (power information value), the generated power information 164b (power information value), the stored power information 164c (power information value), the vehicle power information 164d (vehicle power value), and the load power information 164e (power information value) in a vertical direction. Specifically, the generation unit 162 arranges the vehicle power value and the power information values ​​in a vertical direction (vertical direction) so that the decimal point of the vehicle power value and the decimal point of each power information value are vertically aligned. In this embodiment, the generation unit 162 arranges the grid power information 164a (power information value) next to the grid power information 164a, the generated power information 164b (power information value) next to the generated power information 164b, and the stored power information 164c (power information value) next to the stored power information 164c. Furthermore, the generation unit 162 places the vehicle power information 164d (vehicle power value) next to the vehicle power information 164d, and places the load power information 164e (power information value) next to the load power information 164e.

[0108] The generation unit 162 performs a connection determination process to determine whether or not the charging / discharging system 10 and the vehicle power storage device 51 are connected, and generate the display data 164m (S206). The connection determination process will be described in detail later.

[0109] In this way, the process in which the generation unit 162 generates the display data 164m (S104 in FIG. 6) ends.

[0110] Next, the connection presence / absence determination process (S206 in FIG. 7) performed by the generation unit 162 will be described in detail. Fig. 8 is a flowchart showing the connection presence / absence determination process performed by the generation unit 162 according to this embodiment. Fig. 9 is a diagram showing an example of display data 164m generated by the generation unit 162 according to this embodiment performing the connection presence / absence determination process.

[0111] 8, the generation unit 162 determines whether or not the vehicle power storage device 51 is connected to the charging / discharging system 10 (S302). When the generation unit 162 determines that the vehicle power storage device 51 is connected to the charging / discharging system 10 (YES in S302), the generation unit 162 generates display data 164m for displaying a screen including a vehicle power graphic 164i on the display device 41 (S304).

[0112] When the generation unit 162 determines that the vehicle power storage device 51 is not connected to the charging / discharging system 10 (NO in S302), the generation unit 162 generates display data 164m for displaying on the display device 41 a screen including a vehicle power graphic 164i that is different from that when it is determined that the vehicle power storage device 51 is connected to the charging / discharging system 10 (S306).

[0113] 9 shows a case where the vehicle power storage device 51 is not connected to the charging / discharging system 10. In this case, the generation unit 162 generates display data 164m for causing the display device 41 to display a screen including a vehicle power graphic 164i having a graphic (vehicle shown in dotted line) different from the graphic (vehicle shown in solid line in FIG. 5) when it is determined that the vehicle power storage device 51 is connected to the charging / discharging system 10. In FIG. 9, the generation unit 162 may generate display data 164m for a screen including a vehicle power graphic 164i in which the vehicle is marked with an "X", the vehicle is changed in color, or the vehicle is not displayed at all, instead of displaying the vehicle with a dotted line.

[0114] Similarly, the generation unit 162 may also determine whether the power generation device 70 or the power storage device 80 is connected to the charge / discharge system 10, and perform the same processing as above.

[0115] In this way, the connection existence determination process (S206 in FIG. 7) performed by the generation unit 162 ends.

[0116] Next, the selection information acquisition process (S108 in FIG. 6) performed by the generation unit 162 will be described in detail. Fig. 10 is a flowchart showing the selection information acquisition process performed by the generation unit 162 according to this embodiment. Fig. 11 is a diagram showing an example of display data 164m generated by the generation unit 162 according to this embodiment performing the selection information acquisition process.

[0117] 10, the generation unit 162 determines whether the acquisition unit 161 has acquired the power storage selection information 41a or the vehicle selection information 41b (S402). When the user selects the power storage power graphic 164h or the power storage power information 164c (power information value) displayed on the display device 41 of the client device 40 by clicking or touching it via the input device 42, the power storage selection information 41a is transmitted to the acquisition unit 161. When the user selects the vehicle power graphic 164i or the vehicle power information 164d (vehicle power value) displayed on the display device 41 by clicking or touching it via the input device 42, the vehicle selection information 41b is transmitted to the acquisition unit 161. When the acquisition unit 161 acquires the power storage selection information 41a or the vehicle selection information 41b, the generation unit 162 determines that the acquisition unit 161 has acquired the power storage selection information 41a or the vehicle selection information 41b.

[0118] When generating unit 162 determines that acquiring unit 161 has acquired power storage selection information 41a or vehicle selection information 41b (YES in S402), generating unit 162 switches between information indicating the power of power storage device 80 or vehicle power storage device 51 and information indicating the SOC, and generates display data 164m (S404). In other words, when generating unit 162 determines that acquiring unit 161 has acquired power storage selection information 41a or vehicle selection information 41b, generating unit 162 generates display data 164m for causing display device 41 to display a screen including information indicating the SOC of power storage device 80 or information indicating the SOC of vehicle power storage device 51. Specifically, when generating unit 162 determines that acquiring unit 161 has acquired power storage selection information 41a, generating unit 162 generates display data 164m for causing display device 41 to display a screen including power storage SOC information 164k. When it is determined that the acquisition unit 161 has acquired the vehicle selection information 41b, the generation unit 162 generates display data 164m for displaying on the display device 41 a screen including the vehicle SOC information 164l.

[0119] 11 shows a case where the acquiring unit 161 has acquired both the power storage selection information 41a and the vehicle selection information 41b. In this case, power storage SOC information 164k (164k1 and 164k2) is displayed instead of the power storage power graphic 164h and the power storage power information 164c (power information value). Vehicle SOC information 164l (164l1 and 164l2) is displayed instead of the vehicle power graphic 164i and the vehicle power information 164d (vehicle power value). Power storage SOC information 164k1 is a graphic that indicates the magnitude of the SOC of the power storage device 80 with a scale, and power storage SOC information 164k2 is a numerical value that indicates the value of the SOC of the power storage device 80. Vehicle SOC information 164l1 is a graphic that indicates the magnitude of the SOC of the vehicle power storage device 51 with a scale, and vehicle SOC information 164l2 is a numerical value that indicates the value of the SOC of the vehicle power storage device 51.

[0120] 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 (S406).

[0121] 11, even when the user selects power storage SOC information 164k or vehicle SOC information 164l displayed on display device 41, acquisition unit 161 acquires power storage selection information 41a or vehicle selection information 41b. In this case, generation unit 162 determines that acquisition unit 161 has acquired power storage selection information 41a or vehicle selection information 41b (YES in S402), and generates display data 164m by switching between information indicating the power of power storage device 80 or vehicle power storage device 51 and information indicating the SOC (S404). In other words, generation unit 162 generates display data 164m for a screen including a power storage power graphic 164h and power storage power information 164c (power information value), or a vehicle power graphic 164i and vehicle power information 164d (vehicle power value), instead of power storage SOC information 164k or vehicle SOC information 164l. 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 (S406).

[0122] Until the acquisition unit 161 acquires the power storage selection information 41a or the vehicle selection information 41b, the generation unit 162 determines that the acquisition unit 161 has not acquired the power storage selection information 41a or the vehicle selection information 41b (NO in S402), and does not perform the subsequent processing for switching the display (S404 to S406). In other words, in this case, the display on the display device 41 of the client device 40 is not switched, and the current display is maintained. When the generation unit 162 determines that the acquisition unit 161 has not acquired the power storage selection information 41a or the vehicle selection information 41b (NO in S402), the generation unit 162 may return to the processing in FIG. 6 (S102 onward).

[0123] In this way, the selection information acquisition process (S108 in FIG. 6) performed by the generation unit 162 ends.

[0124] [4. Explanation of effects] As described above, the charging / discharging system 10 according to this embodiment generates display data 164m for displaying on the display device 41 a screen including a vehicle power graphic 164i indicating the amount of power flowing between the vehicle power storage device 51 and the charging / discharging system 10, and transmits the display data 164m to the display device 41. This allows the vehicle power graphic 164i to be displayed on the display device 41, making it easier to visually (intuitively) grasp the amount of power flowing between the vehicle power storage device 51 and the charging / discharging system 10. In this way, transmitting the display data 164m of the screen including the vehicle power graphic 164i to the display device 41 makes it easier to grasp the amount of power flowing between the vehicle power storage device 51 and the charging / discharging system 10, making it easier to grasp the exchange of power in the charging / discharging system 10.

[0125] The charging / discharging system 10 generates display data 164m for causing the display device 41 to display a screen including a vehicle power graphic 164i that further indicates whether the power flowing between the vehicle power storage device 51 and the charging / discharging system 10 is charging power or discharging power for the vehicle power storage device 51. By displaying the vehicle power graphic 164i on the display device 41, it becomes easier to visually (intuitively) understand whether the power flowing between the vehicle power storage device 51 and the charging / discharging system 10 is charging power or discharging power for the vehicle power storage device 51 (direction of current). By transmitting the display data 164m for the screen including the vehicle power graphic 164i to the display device 41 in this way, it becomes easy to understand the direction of the current flowing between the vehicle power storage device 51 and the charging / discharging system 10, and therefore the exchange of power in the charging / discharging system 10 can be easily understood.

[0126] The charging / discharging system 10 generates display data 164m for causing the display device 41 to display a screen including a vehicle power graphic 164i that indicates, with a scale, the amount of power flowing between the vehicle power storage device 51 and the charging / discharging system 10. By displaying the vehicle power graphic 164i on the display device 41, the amount of power flowing between the vehicle power storage device 51 and the charging / discharging system 10 can be easily grasped visually (intuitively) using the scale. By transmitting the display data 164m for the screen including the vehicle power graphic 164i to the display device 41 in this manner, the amount of power flowing between the vehicle power storage device 51 and the charging / discharging system 10 can be easily grasped, and therefore the exchange of power in the charging / discharging system 10 can be easily grasped.

[0127] When the charging / discharging system 10 determines that the vehicle power storage device 51 is not connected to the charging / discharging system 10, the charging / discharging system 10 generates display data 164m for causing the display device 41 to display a screen including a vehicle power graphic 164i that is different from that displayed when the charging / discharging system 10 determines that the vehicle power storage device 51 is connected. In other words, when the vehicle power storage device 51 is not connected to the charging / discharging system 10, the charging / discharging system 10 generates display data 164m for causing the display device 41 to display a screen indicating that the vehicle power storage device 51 is not connected. This allows the connection status of the vehicle power storage device 51 to the charging / discharging system 10 to be displayed on the screen of the display device 41, making it easy to visually (intuitively) understand that even if charging / discharging between the charging / discharging system 10 and the vehicle power storage device 51 has stopped, this does not mean that there is a malfunction in the equipment. This makes it easy to understand the exchange of power in the charging / discharging system 10.

[0128] When the charging / discharging system 10 acquires the vehicle selection information 41b, it generates display data 164m for displaying on the display device 41 a screen including information indicating the SOC of the vehicle power storage device 51. This allows the information indicating the SOC of the vehicle power storage device 51 to be displayed on the display device 41, making it possible to easily understand the state of charge of the vehicle power storage device 51 and the exchange of power in the charging / discharging system 10. Furthermore, when the charging / discharging system 10 acquires the vehicle selection information 41b again, it can display the original screen on the display device 41, making it possible to easily understand the exchange of power in the charging / discharging system 10. The same applies when the charging / discharging system 10 acquires the power storage selection information 41a.

[0129] The charge / discharge system 10 generates display data 164m for displaying on the display device 41 a screen further including a power information graphic, which is a graphic indicating the magnitude of power indicated by at least one of the power information items 164a, the power generation power information 164b, the stored power information 164c, and the load power information 164e. This allows the display device 41 to display, in addition to the vehicle power graphic 164i, the power information graphic indicating the magnitude of power input / output to / from the charge / discharge system 10, making it easier to visually (intuitively) grasp the magnitude of power input / output to / from the charge / discharge system 10. In this way, by transmitting the display data 164m of the screen further including the power information graphic to the display device 41, the magnitude of power input / output to / from the charge / discharge system 10 can be easily grasped, and therefore the exchange of power in the charge / discharge system 10 can be easily grasped.

[0130] When the vehicle power graphic 164i and the power information graphic are long in a predetermined direction and are aligned in the predetermined direction (longitudinal direction), it becomes difficult to view the vehicle power graphic 164i and the power information graphic all at once. For this reason, the charge / discharge system 10 generates display data 164m for displaying on the display device 41 a screen in which the vehicle power graphic 164i and the power information graphic are aligned in a direction intersecting the longitudinal direction. This makes it easier to visually (intuitively) grasp the vehicle power graphic 164i and the power information graphic all at once. In this way, by transmitting the display data 164m of the screen in which the vehicle power graphic 164i and the power information graphic are aligned in a direction intersecting the longitudinal direction to the display device 41, the vehicle power graphic 164i and the power information graphic can be easily grasped, and therefore the exchange of power in the charge / discharge system 10 can be easily grasped.

[0131] Generally, when information about the power grid 60 is included among a plurality of pieces of information, it is easier to visually (intuitively) understand the information about the power grid 60 if it is located at the edge. The same applies to information about the power load 20. For this reason, the charge / discharge system 10 generates display data 164m for displaying on the display device 41 a screen in which at least one of the grid power graphic 164f and the load power graphic 164j is located at the edge of the vehicle power graphic 164i and the plurality of power information graphics. This allows the display device 41 to display a screen in which at least one of the information about the power grid 60 (the grid power graphic 164f) and the information about the power load 20 (the load power graphic 164j) is located at the edge, making it easier to visually (intuitively) understand the information. Therefore, the exchange of power in the charge / discharge system 10 can be easily understood.

[0132] Generally, when multiple numerical values ​​are displayed on a screen, it is easier to compare the numerical values ​​and perform calculations (mental arithmetic) when the numerical values ​​are arranged vertically rather than horizontally. For this reason, the charge / discharge system 10 generates display data 164m for displaying on the display device 41 a screen in which the vehicle power value and the power information value are arranged vertically. This allows the display device 41 to display a screen in which the vehicle power value and the power information value are arranged vertically, making it easier to compare and perform calculations (mental arithmetic) between the vehicle power value and the power information value. Therefore, the exchange of power in the charge / discharge system 10 can be easily understood.

[0133] Generally, when multiple numerical values ​​are arranged vertically and displayed on a screen, it is easier to compare the numerical values ​​and perform calculations (mental arithmetic) if the multiple numerical values ​​are arranged so that their decimal points are vertically aligned. For this reason, the charge / discharge system 10 generates display data 164m for displaying on the display device 41 a screen in which the vehicle power value and the power information value are arranged so that the decimal points of the vehicle power value and the power information value are vertically aligned. This allows the display device 41 to display a screen in which the vehicle power value and the power information value are arranged so that the decimal points are vertically aligned, making it easier to compare the vehicle power value and the power information value and perform calculations (mental arithmetic). Therefore, the exchange of power in the charge / discharge system 10 can be easily understood.

[0134] In the control method for charge / discharge system 10, display data 164m for displaying on display device 41 a screen including vehicle power graphic 164i indicating the amount of power flowing between vehicle power storage device 51 and charge / discharge system 10 is generated, and display data 164m is transmitted to display device 41. As a result, vehicle power graphic 164i can be displayed on display device 41, making it easier to visually (intuitively) grasp the amount of power flowing between vehicle power storage device 51 and charge / discharge system 10. In this way, according to the control method for charge / discharge system 10, by transmitting display data 164m of the screen including vehicle power graphic 164i to display device 41, it becomes easy to grasp the amount of power flowing between vehicle power storage device 51 and charge / discharge system 10. As a result, it is easy to grasp the exchange of power in charge / discharge system 10.

[0135] In the example of Figure 5, by viewing the display data 164m displayed on the display device 41 of the client device 40, it can be easily understood that no electricity is being bought or sold from the power grid 60, that the power generated by the power generation device 70 is covering the power load 20, and that the surplus electricity is being used to charge the storage device 80.

[0136] [5. Explanation of Variations] Although the charging / discharging system 10 and the control method for the charging / discharging system 10 according to the present embodiment have been described above, the present invention is not limited to the above embodiment. The embodiment disclosed herein is illustrative in all respects and is not restrictive, and the scope of the present invention includes all modifications within the meaning and scope of the claims.

[0137] In the above embodiment, the functions possessed by the first communication unit 160 may be possessed by the second communication unit 230, or may be possessed by other devices within the charging / discharging system 10, or by devices outside the charging / discharging system 10 (such as the server device 30 or the client device 40).

[0138] In the above embodiment, the display data 164m may be displayed on a display device of the server device 30 or a display device possessed by an apparatus within the charging / discharging system 10 (power conditioner 100 or charger / discharger 200) instead of on the display device 41 of the client device 40.

[0139] In the above embodiment, both the power generation device 70 and the power storage device 80 are connected to the charge / discharge system 10, but it is sufficient if at least one of the power generation device 70 and the power storage device 80 is connected. Alternatively, the charge / discharge system 10 does not necessarily have to be connected to both the power generation device 70 and the power storage device 80.

[0140] In the above embodiment, the power conditioner 100 and the charger / discharger 200 of the charge / discharge system 10 may be integrated. The power conditioner 100 may have a built-in function of the charger / discharger 200, or the charger / discharger 200 may have a built-in function of the power conditioner 100.

[0141] In the above embodiment, the first communication unit 160 is assumed to have a memory unit 164, but it may not have a memory unit 164 and may store information in an external recording medium and acquire the information from the recording medium.

[0142] In the above embodiment, the vehicle power graphic 164i and the power information graphic are arranged horizontally and vertically, but they may also be arranged diagonally. The vehicle power graphic 164i and the power information graphic may be arranged vertically and diagonally, or may be arranged vertically and diagonally, or may be arranged diagonally and intersecting the diagonal. The size and shape of the vehicle power graphic 164i and the power information graphic are not particularly limited.

[0143] In the above embodiment, the grid power graphic 164f is arranged at the top and the load power graphic 164j is arranged at the bottom, but the load power graphic 164j may be arranged at the top and the grid power graphic 164f at the bottom. Either the grid power graphic 164f or the load power graphic 164j does not have to be arranged at an end, and neither of them does have to be arranged at an end.

[0144] In the above embodiment, the grid power graphic 164f has ten scale marks, five on each side, but the number of scale marks is not particularly limited, and may be three on each side, or ten on each side. The number of scale marks may be different on the left and right sides, or may be continuous. The same applies to other graphics, such as the generated power graphic 164g.

[0145] In the above embodiment, the order of the various processes performed by the generation unit 162 may be interchanged. For example, the process of S202 and the process of S204 in Fig. 7 may be interchanged, or the process of S204 and the process of S206 may be interchanged.

[0146] The present invention can be realized not only as the charging / discharging system 10 and a control method for the charging / discharging system 10, but also as a program for causing a computer to execute processes included in the control method for the charging / discharging system 10. That is, each component included in the first communication unit 160 of the charging / discharging system 10 may be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory. The present invention can also be realized as a computer-readable non-transitory recording medium on which the program is recorded, such as a flexible disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blu-ray (registered trademark) Disc), or semiconductor memory. The program can be distributed via the recording medium or a transmission medium such as the Internet. The present invention can also be realized as an integrated circuit including a processing unit included in the charging / discharging system 10. That is, each functional block of the first communication unit 160 of the charging / discharging system 10 shown in FIG. 4 may be realized as an LSI (Large Scale Integration) integrated circuit. These functional blocks may be individually implemented on a single chip, or some or all of them may be integrated on a single chip. In this way, each component of the first communication unit 160 of the charging / discharging system 10 may be configured with dedicated hardware, or may be realized by executing a software program suitable for each component.

[0147] Any combination of the components in the above-described embodiments and their modifications is also included within the scope of the present invention. [Industrial Applicability]

[0148] The present invention can be applied to a charging / discharging system or the like that charges and discharges between a vehicle and an electricity storage device. [Explanation of symbols]

[0149] 1. Supply area 10 Charging and discharging system 20 Power load 40 Client Device 41 Display device 41a Storage Selection Information 41b Vehicle selection information 50 vehicles 51 Vehicle power storage device 60 Power system 70 Power Generation Equipment 80 Electricity storage device 100 Power Conditioner 150, 220 Control unit 160 First Communications Department 161 Acquisition Department 162 Generation part 163 Transmitter 164 Storage section 164a Grid power information 164b Power generation information 164c Storage Power Information 164d Vehicle power information 164e Load power information 164f Power grid diagram 164g Power Generation Chart 164h storage power diagram 164i Vehicle Power Diagram 164j Load power diagram 164k, 164k1, 164k2 Energy storage SOC information 164l, 164l1, 164l2 Vehicle SOC information 164m Display Data 200 charger / discharger 210 Charging / Discharging Unit 230 Second Communications Department

Claims

1. A charging / discharging system that charges / discharges between a vehicle power storage device, which is a power storage device included in a vehicle, in a predetermined supply area to which power is supplied from an electric power grid, and supplies power to an electric load within the supply area, an acquisition unit that acquires vehicle power information indicating power flowing between the vehicle power storage device and the charging / discharging system; a generation unit that generates display data for displaying on a display device a screen including a vehicle power graphic that is a graphic indicating the magnitude of power indicated by the vehicle power information; a transmitter that transmits the display data to the display device, the acquisition unit is configured to acquire vehicle selection information indicating that the vehicle electric power graphic displayed on the display device has been selected, The generation unit generates the display data for displaying, on the display device, a screen including information indicating a state of charge (SOC) of the vehicle power storage device when the acquisition unit acquires the vehicle selection information. Charging and discharging system.

2. the acquisition unit acquires the vehicle power information including information indicating whether the power flowing between the vehicle power storage device and the charging / discharging system is charging power from the charging / discharging system to the vehicle power storage device or discharging power from the vehicle power storage device to the charging / discharging system; The generation unit generates the display data for causing the display device to display a screen including the vehicle power graphic further indicating whether the power indicated by the vehicle power information is the charging power or the discharging power. The charging / discharging system according to claim 1 .

3. The generation unit generates the display data for displaying on the display device a screen including the vehicle power graphic that indicates, by a scale, the magnitude of the power indicated by the vehicle power information. The charging / discharging system according to claim 1 or 2.

4. The generation unit determines whether the vehicle power storage device is connected to the charging / discharging system, and when it is determined that the vehicle power storage device is not connected to the charging / discharging system, generates the display data for causing the display device to display a screen including the vehicle power graphic that is different from a screen including the vehicle power graphic when it is determined that the vehicle power storage device is connected to the charging / discharging system. The charge / discharge system according to any one of claims 1 to 3.

5. the acquisition unit further acquires at least one of power information: system power information indicating power flowing between the power grid and the charging / discharging system; generated power information indicating power flowing between a power generation device and the charging / discharging system; stored power information indicating power flowing between a power storage device and the charging / discharging system; and load power information indicating power consumption of the power load; The generation unit generates the display data for displaying on the display device a screen further including a power information graphic that is a graphic indicating the magnitude of power indicated by the power information. The charge / discharge system according to any one of claims 1 to 4.

6. The generation unit generates the display data for displaying on the display device a screen in which the vehicle electric power graphic and the electric power information graphic, which are long in a predetermined direction, are arranged in a direction intersecting the predetermined direction. The charging / discharging system according to claim 5 .

7. the acquisition unit acquires a plurality of pieces of power information including at least one of the grid power information and the load power information; The generation unit generates the display data for displaying on the display device a screen in which at least one of a grid power graphic that is a graphic indicating the magnitude of power indicated by the grid power information and a load power graphic that is a graphic indicating the magnitude of power indicated by the load power information is arranged at an end of the vehicle power graphic and the plurality of power information graphics. The charging / discharging system according to claim 5 or 6.

8. The generation unit generates the display data for displaying on the display device a screen including a vehicle power value that is a numerical value indicating the magnitude of power indicated by the vehicle power information and a power information value that is a numerical value indicating the magnitude of power indicated by the power information, and on which the vehicle power value and the power information value are arranged vertically. The charge / discharge system according to any one of claims 5 to 7.

9. The generation unit generates the display data for displaying on the display device a screen on which the vehicle power value and the power information value are arranged so that decimal points of the vehicle power value and the power information value are vertically aligned. The charging / discharging system according to claim 8 .

10. A control method for a charge / discharge system that charges / discharges between a vehicle power storage device, which is a power storage device included in a vehicle, in a predetermined supply area to which power is supplied from a power grid, and supplies power to an electric load within the supply area, comprising: acquiring vehicle power information indicating power flowing between the vehicle power storage device and the charging / discharging system; generating display data for displaying on a display device a screen including a vehicle power graphic, which is a graphic indicating the magnitude of power indicated by the vehicle power information; transmitting the display data to the display device; When vehicle selection information indicating that the vehicle power graphic displayed on the display device has been selected is acquired, the display data is generated to display a screen including information indicating an SOC (State Of Charge) of the vehicle power storage device on the display device. A method for controlling a charging and discharging system.

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

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