Display device and display program

Abstract

To provide a display device and a display program which allow a user to recognize the existence of a vehicle battery when the power cannot be obtained from a system power source.SOLUTION: A display device used in a storage battery system 1 having a storage battery B which is charged with power supplied from a system power source PS and power supplied from a vehicle battery LB and can supply the charged power to a load, comprises: a display unit 12 which displays an image; and an image control unit 13 which controls the image displayed on the display unit. The image control unit can cause the display unit to display information that the vehicle battery that can be connected to the storage battery system exists, and causes the display unit to display the display mode indicating that the vehicle battery to be displayed when the storage battery system operates in the autonomous operation exists in a different mode from the display mode indicating that the vehicle battery to be displayed when the storage battery system operates in the normal operation exists.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a display device and a display program. [Background technology]

[0002] Conventionally, there is known a display device that is applied to a storage battery system including a secondary battery and a solar cell, and has a solar cell display unit that indicates whether or not the solar cell is connected to a storage battery icon (see, for example, Patent Document 1). When the solar cell display unit of this display device is not connected to the storage battery system, it indicates whether or not the solar cell is connected to the storage battery system using a different color or shape than when the solar cell is connected to the storage battery system. This makes it possible for the display device to accurately recognize the connection status of the solar cell in the storage battery system. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-139331 Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, storage battery systems have been developed that are configured to be connectable to vehicle batteries installed in electric vehicles and the like in addition to solar cells. When such storage battery systems are used in homes, for example, and power cannot be obtained from the grid power supply during a power outage or other such event, the power stored in the storage battery and the vehicle battery can be supplied to electrical devices connected to the storage battery system. This allows the use of the storage battery to be extended by utilizing the power stored in the vehicle battery when the storage battery system cannot obtain power from the grid power supply.

[0005] A display device used in such a storage battery system to which a vehicle battery can be connected may, for example, display an icon on a display terminal indicating that the storage battery system and the vehicle battery are connected when the vehicle battery is connected to the storage battery system. In contrast, when the vehicle battery is not connected to the storage battery system, the display terminal generally does not display an icon indicating that the storage battery system and the vehicle battery are not connected. In this case, unless a vehicle battery is connected to the storage battery system, the display device cannot make the user of the storage battery system aware of the presence of a vehicle battery that can be connected to the storage battery system.

[0006] Therefore, even if power cannot be obtained from the grid power supply, if the user is not aware that the vehicle battery can be connected to the storage battery system, the user will not be able to connect the vehicle battery to the storage battery system. Also, if the user forgets to connect the vehicle battery to the storage battery system, the user will not be prompted to utilize the power charged in the vehicle battery. As a result, the power charged in the vehicle battery cannot be supplied to the storage battery, leading to a loss of opportunity to extend the usable time of the storage battery.

[0007] The present disclosure aims to provide a display device and a display program that can make a user of a storage battery system aware of the presence of a vehicle battery when power cannot be obtained from a grid power source. [Means for solving the problem]

[0008] The invention described in claim 1 is A display device used in a storage battery system (1) having a storage battery (B) that is capable of charging power supplied from a system power supply (PS) and power supplied from a vehicle battery (LB) and supplying the charged power to a load, A display unit (12) for displaying an image; an image control unit (13) that controls an image to be displayed on the display unit; The battery system is capable of independent operation in which it operates without being electrically connected to the grid power supply, and normal operation in which it operates in a state where it is electrically connected to the grid power supply, The image control unit can cause the display unit to display that there is a vehicle battery that can be connected to the storage battery system, and the display form indicating the presence of a vehicle battery that is displayed when the storage battery system is operating in autonomous mode is different from the display form indicating the presence of a vehicle battery that is displayed when the storage battery system is operating in normal mode.

[0009] According to this, when the storage battery system is in an autonomous operation state, the display device causes the display unit to display a state in which the vehicle battery and the storage battery system are not connected, thereby making it possible for the user of the storage battery system to recognize the presence of a vehicle battery that can be connected to the storage battery system when the storage battery system is in an autonomous operation state.

[0010] The reference symbols in parentheses attached to each component indicate an example of the correspondence between the component and the specific components described in the embodiments described below. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a schematic configuration diagram of storage according to the present embodiment. [Figure 2] 10 is an example of an image displayed by a display unit according to the present embodiment. [Figure 3] 10 is a flowchart showing a system state determination process executed by the power conditioner. [Figure 4] 4 is a flowchart showing a storage battery determination process executed by the power conditioner. [Figure 5] 10 is a flowchart showing a power consumption determination process executed by the power conditioner. [Figure 6] 4 is a flowchart showing a grid power supply determination process executed by the power conditioner. [Figure 7]10 is a flowchart showing a solar cell determination process executed by the power conditioner. [Figure 8] 4 is a flowchart showing a vehicle power supply determination process executed by the power conditioner. [Figure 9] 10 is a part of a flowchart showing an image determination process executed by an image control unit. [Figure 10] 10 is a part of a flowchart showing an image determination process executed by an image control unit. [Figure 11] 10 is an example of an image displayed by the display unit when the storage battery system is in a power selling state. [Figure 12] 10 is an example of an image displayed on the display unit when power is not supplied from the solar cell to the storage battery system. [Figure 13] 10 is an example of an image displayed by the display unit when the storage battery system is in an independent operation state. [Figure 14] 10 is an example of an image displayed on a display unit showing a method of connecting a storage battery system and a vehicle battery. [Figure 15] 10 is an example of an image displayed on a display unit showing a method of connecting a storage battery system and a vehicle battery. [Figure 16] 10 is an example of an image displayed on a display unit showing a method of connecting a storage battery system and a vehicle battery. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 16. A display device 10 of the present embodiment is used in, for example, a storage battery system 1 shown in Fig. 1. First, the storage battery system 1 will be described.

[0013] The storage battery system 1 includes a solar cell SB and a storage battery B, and is configured to be connectable to a power grid PS that supplies commercial power and a vehicle battery LB. The solar cell SB generates DC power by converting sunlight into electrical energy and outputs the generated DC power. The power grid PS is a power source that supplies AC power supplied from a commercial power distribution network of an electric power company. The vehicle battery LB is, for example, a lithium-ion battery provided in an electric vehicle, and is a secondary battery that can be charged with power supplied from an external source and output the charged power as DC to the outside. The storage battery system 1 is configured to be able to charge the storage battery B with power generated by the solar cell SB, power supplied from the power grid PS, and power supplied from the vehicle battery LB.

[0014] The vehicle battery LB may be a secondary battery provided in a fuel cell vehicle or a hybrid vehicle, which can be charged using energy generated by deceleration of the vehicle, etc. The battery system 1 may be connected to a generator so that the power generated by the generator can be charged to the battery B, or may be connected to a portable battery so that the power supplied from the portable battery can be charged to the battery B.

[0015] The battery storage system 1 converts DC power supplied from the solar cell SB and the vehicle battery LB into AC power, and supplies the obtained power to the electrical appliances EP, which are loads installed in the house, by connecting to the power grid PS. The battery storage system 1 is also configured to be able to sell surplus power, which is the obtained power but is consumed by the electrical appliances EP, to the power grid PS.

[0016] The storage battery system 1 includes a display device 10 that displays the amount of power supplied from the power grid PS, solar cell SB, and vehicle battery LB, the amount of power consumed by each electrical appliance EP, and the like to a user of the storage battery system 1. The storage battery system 1 also includes an AC / DC converter 3 and a power conditioner 5, as shown in FIG.

[0017] The AC / DC converter 3 is an AC / DC converter that converts AC power output from the vehicle into DC power. The input side of the AC / DC converter 3 is connected to the vehicle battery LB via an adapter AD that is connected to an AC outlet provided inside the vehicle cabin. The output side of the AC / DC converter 3 is connected to a power conditioner 5.

[0018] The power conditioner 5 is a control device for the storage battery system 1 that interconnects the power supplied from the solar cell SB and the vehicle battery LB with the grid power supply PS and outputs the interconnected power. The power conditioner 5 is electrically connected to the grid power supply PS, the solar cell SB, and the AC / DC converter 3 on its input side, and electrically connected to each electrical device EP installed in the house on its output side. The power conditioner 5 is also connected to the storage battery B, and is configured to output the interconnected power to the storage battery B and to receive power output from the storage battery B.

[0019] The power conditioner 5 includes a DC / DC converter (not shown) that boosts the input DC power, a DC / AC inverter (not shown) that converts the DC power to AC power, etc. The power conditioner 5 is configured to output the converted AC power to each electrical device EP and to output DC power to the storage battery B.

[0020] When the amount of power supplied from the solar cell SB exceeds the total amount of power consumed by the electrical devices EP connected to the battery storage system 1, resulting in surplus power, the power conditioner 5 sells the surplus power to the power company or charges the storage battery B. When the amount of power supplied from the solar cell SB is less than the total amount of power consumed by the electrical devices EP connected to the battery storage system 1, the power conditioner 5 purchases the shortfall in power from the power company and supplies it to the electrical devices EP.

[0021] When the storage battery system 1 is not electrically connected to the power grid PS, such as during a power outage, the storage battery system 1 is configured to be able to operate using power supplied from the solar cell SB and power supplied from the vehicle battery LB via the AC / DC converter 3. The storage battery system 1 of this embodiment is also configured to receive power from the vehicle battery LB via the AC / DC converter 3 only when the storage battery system 1 is not electrically connected to the power grid PS, such as during a power outage. Hereinafter, the operating mode of the storage battery system 1 when the storage battery system 1 operates in a state where it is electrically connected to the power grid PS is referred to as normal operation. The operating mode of the storage battery system 1 when the storage battery system 1 operates in a state where it is not electrically connected to the power grid PS is referred to as isolated operation.

[0022] The power conditioner 5 also has a control unit 6 and a communication unit 7. The control unit 6 is composed of a microcomputer including storage units such as a CPU, ROM, and RAM, and its peripheral circuits, and is a control device that controls the operation of the storage battery system 1. The control unit 6 performs various calculations and processes based on programs stored in the ROM.

[0023] The communication unit 7 is a part that transmits the processing results executed by the control unit 6 to the display device 10 by communicating with the display device 10, and also acquires information transmitted from the display device 10. The communication unit 7 is configured to be able to control the operation of the display device 10 by transmitting a control signal to the display device 10. The communication unit 7 is also configured to be able to transmit information input to the display device 10 to the control unit 6 by receiving a control signal transmitted from the display device 10.

[0024] The display device 10 is a display that displays to the user of the storage battery system 1 the amount of power supplied from the system power supply PS, solar cell SB, and vehicle battery LB, the amount of power consumed by each electrical device EP, etc., based on a control signal transmitted from the power conditioner 5.

[0025] The display device 10 of this embodiment is configured, for example, by a smartphone, and the display screen changes based on signals transmitted from the communication unit 7 of the power conditioner 5, and the user of the storage battery system 1 can operate the display screen. An application program for mutual transmission with the communication unit 7 is also installed in the display device 10. The display device 10 performs various calculations and processes based on the installed application program. In this embodiment, this application program corresponds to the display program.

[0026] The display device 10 includes a display communication unit 11 that communicates with the communication unit 7 of the power conditioner 5, a display unit 12 that displays an image, and an image control unit 13 that controls the image displayed by the display unit 12.

[0027] The display communication unit 11 is configured to be able to communicate with the communication unit 7 of the power conditioner 5, and receives information such as remaining capacity information of the storage battery B transmitted from the communication unit 7, and information on the amount of power supplied to the storage battery system 1 from each of the grid power supply PS, the solar cell SB, and the vehicle battery LB. The display communication unit 11 also transmits information input to the display unit 12 to the communication unit 7 of the power conditioner 5.

[0028] The image control unit 13 is composed of a microcomputer including a CPU, a ROM, a RAM, and other storage units, and its peripheral circuits, and performs various calculations and processing based on installed application programs. The image control unit 13 controls the output of images to be displayed on the display unit 12 based on various information sent to the display communication unit 11.

[0029] The display unit 12 is a display device that displays images determined by various calculations and processes performed by the image control unit 13. In addition, the display unit 12 of this embodiment is configured as a touch panel, and is configured so that information can be input by operation of the user of the storage battery system 1. The information input to the display unit 12 is transmitted to the communication unit 7 of the power conditioner 5 via the display communication unit 11.

[0030] The display device 10 is not limited to a smartphone, and may be configured as, for example, a tablet, a touch panel display, or the like.

[0031] 2, the image displayed by the display unit 12 has a plurality of icons indicating devices connected to the storage battery system 1 and a plurality of display portions indicating the flow of electricity between each of the connected devices and the storage battery system 1. The image displayed by the display unit 12 also has a plurality of display portions indicating information such as the amount of power supplied to the storage battery system 1 and the amount of power consumed by the storage battery system 1. Furthermore, the image displayed by the display unit 12 has a system status display portion 80 that indicates whether the operation mode of the storage battery system 1 is autonomous operation or normal operation.

[0032] Specifically, the image displayed by the display unit 12 includes a storage battery icon 30, a house icon 40, a grid icon 50, a sun icon 60, and a vehicle icon 70 as icons indicating devices connected to the storage battery system 1. The image displayed by the display unit 12 also includes a charge / discharge direction display unit 31, a grid direction display unit 51, a sun direction display unit 61, and a vehicle direction display unit 71 as display parts indicating the flow of electricity between each connected device and the storage battery system 1. The image displayed by the display unit 12 also includes a charge / discharge display unit 32, a consumption amount display unit 42, a grid trading amount display unit 52, a solar power supply amount display unit 62, and a vehicle power supply amount display unit 72 as display parts indicating information such as the amount of power supplied to the storage battery system 1 and the amount of power consumed by the storage battery system 1.

[0033] The storage battery icon 30 is an icon representing the storage battery B connected to the storage battery system 1, and is configured, for example, with a graphic that resembles a cylindrical battery. The storage battery icon 30 also includes a line indicating the amount of power charged to the storage battery B. The position of the line on the storage battery icon 30 changes depending on the remaining amount of power stored, as shown in FIG. 13 (to be described later) and other figures.

[0034] The charge / discharge direction display unit 31 indicates a charging state in which the storage battery B is charged by receiving power from one or more of the system power supply PS, the solar battery SB, and the vehicle battery LB, and a discharging state in which the storage battery B discharges the stored power by supplying it to each electrical appliance EP. Specifically, the charge / discharge direction display unit 31 is composed of a charging arrow 31a pointing from the house icon 40 to the storage battery icon 30, and a discharging arrow 31b pointing from the storage battery icon 30 to the house icon 40. The charging arrow 31a indicates a state in which the storage battery B is charging by receiving power from one or more of the system power supply PS, the solar battery SB, and the vehicle battery LB. The discharging arrow 31b indicates a state in which the storage battery B is discharging by supplying the stored power to each electrical appliance EP.

[0035] Furthermore, charge / discharge direction display unit 31 is configured to be able to change the display form of charge arrow 31a and discharge arrow 31b depending on whether power is being supplied to storage battery B or whether storage battery B is discharging power. Specifically, charge arrow 31a, which indicates the charging state, is displayed in a dark color when power is being supplied to storage battery B, thereby indicating that the power supply state to storage battery B is in an ON state. On the other hand, charge arrow 31a is displayed in a light color when power is not being supplied to storage battery B, thereby indicating that the power supply state to storage battery B is in an OFF state.

[0036] Furthermore, the discharge arrow 31b indicating the discharge information is configured to be displayed in a dark color when the storage battery B is discharging power, thereby indicating that the power discharging state from the storage battery B is in an ON state. On the other hand, the discharge arrow 31b is configured to be displayed in a light color when the storage battery B is not discharging power, thereby indicating that the power discharging state from the storage battery B is in an OFF state.

[0037] In this way, the charge / discharge direction display unit 31 displays the charge arrow 31a in the ON state and the discharge arrow 31b in the OFF state when power is being supplied to the storage battery B. Also, the charge / discharge direction display unit 31 displays the discharge arrow 31b in the ON state and the charge arrow 31a in the OFF state when the storage battery B is discharging power.

[0038] In Fig. 2, the discharging arrow 31b is shown in a light color with a dashed line. In contrast, the charging arrow 31a is shown in a dark color with a solid line. Similarly, in the icons, figures, and characters shown in Fig. 2 and Figs. 11 to 13 described below, portions displayed in a light color are shown with dashed lines, and portions displayed in a dark color are shown with solid lines.

[0039] Furthermore, when power is not being supplied to the storage battery B and the storage battery B is not discharging power, the charge / discharge direction display unit 31 displays both the charge arrow 31a and the discharge arrow 31b in the off state.

[0040] Furthermore, charge / discharge direction display unit 31 is configured to be able to change the display mode depending on whether the power supply source to storage battery system 1 is only solar cell SB or includes sources other than solar cell SB. In other words, charge / discharge direction display unit 31 is configured to be able to change the display mode of the charging state to be displayed when storage battery B is being charged only with power supplied from solar cell SB, and to change the display mode of the charging state to be displayed depending on whether storage battery B is being charged with power including at least one of power supplied from system power supply PS and power supplied from vehicle battery LB.

[0041] Specifically, the charge / discharge direction display unit 31 is configured so that the color of the charge arrow 31a indicating the charging state differs depending on whether the power supply source to the storage battery system 1 is only the solar cell SB or whether it includes at least one of the system power supply PS and the vehicle battery LB.

[0042] For example, in this embodiment, when the power supply source to the battery system 1 is only the solar cell SB, the color of the charging arrow 31a is displayed in blue, which is generally used to indicate environmental safety. When the power supply source to the battery system 1 includes at least one of the power grid power supply PS and the vehicle battery LB, the color of the charging arrow 31a is displayed in a color other than blue (orange in this embodiment).

[0043] The color of the charging arrow 31a when the only power supply source to the battery storage system 1 is the solar cell SB is not limited to blue and may be displayed in a color other than blue. Furthermore, the color of the charging arrow 31a when the power supply sources to the battery storage system 1 include at least one of the grid power supply PS and the vehicle battery LB may be displayed in a color other than orange as long as it is different from the color of the charging arrow 31a when the only power supply source is the solar cell SB.

[0044] Furthermore, the display form of the charging arrow 31a is not limited to an arrow. For example, the charging arrow 31a may be displayed in a figure other than an arrow as long as it can indicate the charging state. Furthermore, the charging arrow 31a may be displayed in a figure other than a figure, such as letters or symbols.

[0045] 11, which will be described later, for the sake of convenience, the color of the charging arrow 31a is shown hatched to indicate a case where the only power supply source to the storage battery system 1 is the solar battery SB. In contrast, in FIG. 2 and FIG. 12, which will be described later, the color of the charging arrow 31a is shown without hatching to indicate a case where the power supply sources to the storage battery system 1 include at least one of the grid power supply PS and the vehicle battery LB.

[0046] The charge / discharge display unit 32 indicates the remaining charge of the storage battery B, and also displays information on the amount of power supplied when power is being supplied to the storage battery B and the amount of power supplied when power is being supplied from the storage battery B to each electrical appliance EP. Specifically, the charge / discharge display unit 32 has a remaining charge display unit 32a that indicates the remaining charge of the storage battery B, and a charge / discharge amount display unit 32b that indicates the amount of power supplied to or from the storage battery B.

[0047] The remaining charge display unit 32a displays, for example, 100% when the storage battery B is fully charged and 0% when it is completely discharged.

[0048] For example, when power is being supplied to the storage battery B, the charge / discharge amount display unit 32b displays the words "charging" to indicate the charging state, and also displays the value of the amount of power being supplied to the storage battery B. Furthermore, when the storage battery B is supplying power to each electric device EP, the charge / discharge amount display unit 32b displays the words "discharging" and also displays the value of the amount of power being supplied by the storage battery B. Furthermore, the charge / discharge amount display unit 32b displays the remaining time for which power can be supplied to each electric device EP, which is calculated from the current remaining charge and the amount of power supplied to each electric device EP.

[0049] The house icon 40 is an icon indicating each electrical appliance EP, which is a load connected to the storage battery system 1, and is configured, for example, as a graphic that resembles the shape of a house.

[0050] The consumption display unit 42 displays the value of the amount of power currently consumed by each electric appliance EP connected to the storage battery system 1 and the self-sufficiency rate of the storage battery system 1. Here, the self-sufficiency rate is the ratio of the integrated value of the amount of power consumed by each electric appliance EP connected to the storage battery system 1 on that day to the integrated value of the amount of power generated by the solar battery SB on that day. The integrated value of the amount of power consumed by each electric appliance EP and the integrated value of the amount of power generated by the solar battery SB can be calculated by the control unit 6 periodically obtaining the amount of power consumed by each electric appliance EP and the amount of power generated by the solar battery SB.

[0051] The self-sufficiency rate decreases as the proportion of the amount of power supplied from the grid power supply PS to the total amount of power consumed by each electrical appliance EP connected to the storage battery system 1 increases. Conversely, the self-sufficiency rate increases as the proportion of the amount of power supplied from the grid power supply PS to the total amount of power consumed by each electrical appliance EP connected to the storage battery system 1 decreases. In other words, the self-sufficiency rate increases as the proportion of the amount of power supplied from the solar cell SB to the total amount of power consumed by each electrical appliance EP connected to the storage battery system 1 increases.

[0052] The grid icon 50 is an icon indicating the grid power supply PS of the electric power company connected to the storage battery system 1, and is configured, for example, with a graphic that resembles the shape of a transmission tower. The grid icon 50 is displayed both when the storage battery system 1 is not electrically connected to the grid power supply PS, such as during a power outage, and when the storage battery system 1 is electrically connected to the grid power supply PS.

[0053] The grid icon 50 is configured so that its display form can be changed depending on whether the storage battery system 1 is not electrically connected to the grid power supply PS, such as during a power outage, or whether the storage battery system 1 is electrically connected to the grid power supply PS. Specifically, the grid icon 50 is configured so that the color of the figure constituting the grid icon 50 differs between when the storage battery system 1 is not electrically connected to the grid power supply PS and when the storage battery system 1 is electrically connected to the grid power supply PS. Note that when the storage battery system 1 is electrically connected to the grid power supply PS, it is in a state where it can purchase electricity from a power company and sell electricity obtained by the storage battery system 1 to the power company.

[0054] In this embodiment, the grid icon 50 is configured so that when the storage battery system 1 is electrically connected to the grid power supply PS, the color of the grid icon 50 is displayed in a dark color, thereby indicating that the connection state with the grid power supply PS is in an ON state. Furthermore, when the storage battery system 1 is not electrically connected to the grid power supply PS, the color of the grid icon 50 is displayed in a light color, thereby indicating that the connection state with the grid power supply PS is in an OFF state. Therefore, the grid icon 50 is easier for a user of the storage battery system 1 to recognize when the storage battery system 1 is electrically connected to the grid power supply PS than when the storage battery system 1 is not electrically connected to the grid power supply PS.

[0055] The grid trading amount display unit 52 indicates the state in which power is being purchased from the power company and the state in which power supplied from the solar cell SB is being sold to the power company. Specifically, the grid trading amount display unit 52 is made up of a power purchase arrow 51a pointing from the grid icon 50 to the house icon 40 and a power sale arrow 51b pointing from the house icon 40 to the grid icon 50. The power purchase arrow 51a indicates the state in which the storage battery system 1 is purchasing power from the power company. The power sale arrow 51b indicates the state in which power supplied from the solar cell SB is being sold to the power company.

[0056] Furthermore, the grid trading amount display unit 52 is configured to be able to change the display format depending on whether the power is being purchased from the power company or whether the electricity obtained by the storage battery system 1 is being sold to the power company. Specifically, the power purchase arrow 51a is configured to be displayed in a dark color when the power is being purchased from the power company, thereby indicating that the power is being purchased from the power company as being in an ON state. On the other hand, the power purchase arrow 51a is configured to be displayed in a light color when the power is not being purchased from the power company, thereby indicating that the power is being purchased from the power company as being in an OFF state.

[0057] Furthermore, when power is being sold to the power company, the power selling arrow 51b is displayed in a dark color, thereby indicating that the power is being sold to the power company as being in an ON state. On the other hand, when power is not being sold to the power company, the power selling arrow 51b is displayed in a light color, thereby indicating that the power is being sold to the power company as being in an OFF state.

[0058] In this way, when power is being purchased from the power company, the power purchase arrow 51a is displayed in the ON state and the power sale arrow 51b is displayed in the OFF state on the grid trading amount display unit 52. Also, when power is being sold to the power company, the power sales arrow 51b is displayed in the ON state and the power purchase arrow 51a is displayed in the OFF state on the grid trading amount display unit 52.

[0059] Furthermore, during a power outage or other such event, when the storage battery system 1 is not electrically connected to the system power supply PS and power purchase and sale are not possible, both the power purchase arrow 51a and the power sale arrow 51b are displayed in the off state.

[0060] Furthermore, the color of the power purchase arrow 51a when displayed in the ON state is the same as the color of the charging arrow 31a when the power supply source to the battery storage system 1 includes at least one of the grid power supply PS and the vehicle battery LB. Specifically, the power purchase arrow 51a in this embodiment is displayed in orange. In contrast, the color of the power sale arrow 51b when displayed in the ON state is the same as the color of the charging arrow 31a when the power supply source to the battery storage system 1 is only the solar cell SB. Specifically, the power sale arrow 51b in this embodiment is displayed in blue.

[0061] The power purchase arrow 51a and the power sale arrow 51b may be displayed in a color different from the color of the charging arrow 31a when the power supply source to the battery storage system 1 includes at least one of the system power supply PS and the vehicle battery LB.

[0062] The grid trading amount display unit 52 displays information on the amount of power purchased from the power company when power is purchased from the power company, and information on the amount of power sold to the power company when power is sold to the power company.

[0063] For example, when purchasing power from a power company, the grid trading volume display unit 52 displays the words "Purchasing power" and the value of the amount of power being purchased. When selling power to a power company, the grid trading volume display unit 52 displays the words "Selling power" and the value of the amount of power being sold. Furthermore, when the storage battery system 1 is not electrically connected to the grid power source PS, such as during a power outage, the grid trading volume display unit 52 displays the amount of power as "0.0 kW" in lighter text than when the storage battery system 1 is electrically connected to the grid power source PS.

[0064] The sun icon 60 is an icon indicating a solar cell SB connected to the storage battery system 1, and is configured, for example, with a graphic that resembles the shape of a plate-shaped solar cell panel. The sun icon 60 indicates that there is a solar cell SB that can be connected to the storage battery system 1. In this embodiment, the sun icon 60 is displayed both when the storage battery system 1 is operating in stand-alone mode and when it is operating normally. The sun icon 60 is also displayed both when the solar cell SB is generating power and therefore able to supply power to the storage battery system 1, and when the solar cell SB is not generating power and therefore unable to supply power to the storage battery system 1.

[0065] The sun icon 60 is configured so that its display form does not change depending on whether the solar cell SB is generating power and therefore able to supply power to the storage battery system 1, or whether the solar cell SB is not generating power and therefore unable to supply power to the storage battery system 1. In other words, the sun icon 60 is configured to be displayed in the on state both when the solar cell SB is able to supply power to the storage battery system 1 and when it is unable to supply power.

[0066] The sun icon 60 may be configured to change its display mode depending on whether the solar cell SB is generating power and thus able to supply power to the storage battery system 1, or whether the solar cell SB is not generating power and therefore unable to supply power to the storage battery system 1. In this case, for example, the sun icon 60 may be configured to display the power supply state as ON when the solar cell SB is able to supply power to the storage battery system 1, and to display the power supply state as OFF when the solar cell SB is unable to supply power.

[0067] The sun direction display unit 61 indicates a state in which the solar cell SB is supplying power to the storage battery system 1 and a state in which the solar cell SB is not supplying power to the storage battery system 1. The sun direction display unit 61 is composed of an arrow pointing from the sun icon 60 to the house icon 40.

[0068] Furthermore, the sun direction display unit 61 is configured to be able to change the display mode depending on whether the solar cell SB is able to supply power to the storage battery system 1 or not. Specifically, the sun direction display unit 61 is configured so that the color of the figure constituting the sun direction display unit 61 is different depending on whether the solar cell SB is generating power or not.

[0069] In this embodiment, the sun direction display unit 61 is configured to be displayed in a dark color when the solar cell SB is generating power, thereby indicating that the power supply state to the storage battery system 1 is in an ON state. In contrast, when the solar cell SB is not generating power, the sun direction display unit 61 is configured to be displayed in a light color, thereby indicating that the power supply state to the storage battery system 1 is in an OFF state.

[0070] Furthermore, the color of the sun direction display unit 61 when it is on is the same color as the color of the charging arrow 31a when the solar cell SB is the only power supply source to the battery storage system 1. Specifically, the sun direction display unit 61 in this embodiment is displayed in blue.

[0071] The color of the sun direction display unit 61 when it is on may be different from the color of the charging arrow 31a when the power supply source to the storage battery system 1 is the solar battery SB only.

[0072] The solar power supply amount display unit 62 displays information regarding the amount of power supplied to the battery storage system 1 when the solar cell SB is generating power. For example, when the solar cell SB is supplying power to the battery storage system 1, the solar power supply amount display unit 62 displays the words "generating power" and the value of the amount of power supply. When the solar cell SB is not generating power, the solar power supply amount display unit 62 displays the amount of power supply as "0.0 kW" in lighter characters than when the solar cell SB is generating power.

[0073] The vehicle icon 70 is an icon indicating a vehicle battery LB connected to the storage battery system 1, and is configured, for example, with a graphic that resembles the shape of a vehicle. The vehicle icon 70 indicates on the display unit 12 that there is a vehicle battery LB that can be connected to the storage battery system 1. The vehicle icon 70 is displayed both when the vehicle battery LB and the storage battery system 1 are connected and when the vehicle battery LB and the storage battery system 1 are not connected.

[0074] Furthermore, the display form of the vehicle icon 70 can be changed depending on whether the storage battery system 1 is operating in autonomous operation or normal operation. Specifically, the vehicle icon 70 is configured so that the color of the shape constituting the vehicle icon 70 differs depending on whether the storage battery system 1 is operating in autonomous operation or normal operation.

[0075] In this embodiment, the vehicle icon 70 is configured to be displayed in a dark color when the storage battery system 1 is operating in an autonomous mode, thereby clearly indicating that there is a vehicle battery LB that can be connected to the storage battery system 1. Furthermore, the vehicle icon 70 is configured to be displayed in a light color when the storage battery system 1 is operating in a normal mode, thereby clearly indicating that there is a vehicle battery LB that can be connected to the storage battery system 1.

[0076] For this reason, the vehicle icon 70 is more easily recognized by a user of the storage battery system 1 when the storage battery system 1 is operating in an autonomous mode than when the storage battery system 1 is operating in a normal mode. However, even when the storage battery system 1 is operating in an autonomous mode, it is possible to make a user of the storage battery system 1 aware of the presence of a vehicle battery LB that can be connected to the storage battery system 1.

[0077] The display unit 12 of this embodiment also functions as a connection method display unit that displays a method for connecting the storage battery system 1 and the vehicle battery LB. The vehicle icon 70 functions as a display request unit that, when operated by a user of the storage battery system 1, requests the display unit 12 to display a method for connecting the storage battery system 1 and the vehicle battery LB. That is, the display request unit that requests the display of a method for connecting the storage battery system 1 and the vehicle battery LB is configured by the vehicle icon 70. When the user presses the vehicle icon 70, an image relating to the method for connecting the storage battery system 1 and the vehicle battery LB that is pre-registered in an application program installed in the image control unit 13 is displayed on the display unit 12.

[0078] The vehicle direction display unit 71 indicates a state in which the vehicle battery LB and the storage battery system 1 are connected and power is being supplied from the vehicle battery LB to the storage battery system 1, and a state in which power is not being supplied from the vehicle battery LB to the storage battery system 1. The vehicle direction display unit 71 is configured with an arrow pointing from the vehicle icon 70 to the house icon 40. The vehicle direction display unit 71 also indicates vehicle power supply direction information that indicates the direction in which power flows from the vehicle battery LB to the storage battery B.

[0079] The vehicle direction display unit 71 is configured to be able to change the display mode depending on whether power is being supplied from the vehicle battery LB to the storage battery system 1 or whether power is not being supplied from the vehicle battery LB to the storage battery system 1. Specifically, the vehicle direction display unit 71 is configured so that the color of the figures constituting the vehicle direction display unit 71 differs depending on whether power is being supplied from the vehicle battery LB to the storage battery system 1 or whether power is not being supplied from the vehicle battery LB to the storage battery system 1.

[0080] The vehicle direction display unit 71 of this embodiment is configured to be displayed in a dark color when power is being supplied from the vehicle battery LB to the storage battery system 1, thereby indicating that the power supply state to the storage battery system 1 is in an ON state. On the other hand, when power is not being supplied from the vehicle battery LB to the storage battery system 1, the vehicle direction display unit 71 is configured to be displayed in a light color, thereby indicating that the power supply state to the storage battery system 1 is in an OFF state.

[0081] Furthermore, the color of the vehicle direction display unit 71 when it is on is the same color as the color of the charging arrow 31a when the power supply source to the battery storage system 1 includes at least one of the power grid power supply PS and the vehicle battery LB. Specifically, the vehicle direction display unit 71 in this embodiment is displayed in orange.

[0082] The vehicle direction display unit 71 may be displayed in a color different from the color of the charging arrow 31a when the power supply source to the storage battery system 1 includes at least one of the system power supply PS and the vehicle battery LB.

[0083] Furthermore, the display form of the vehicle direction display unit 71 is not limited to only an arrow. For example, as long as it is possible to indicate the vehicle power supply direction information, the display form of the vehicle direction display unit 71 may be a graphic other than an arrow. Furthermore, the display form of the vehicle direction display unit 71 may be a display form other than a graphic, such as a letter or a symbol.

[0084] The vehicle power supply amount display unit 72 displays vehicle power supply amount information relating to the amount of power supplied to the battery storage system 1 when power is being supplied from the vehicle battery LB to the battery storage system 1. For example, when the vehicle battery LB is supplying power to the battery storage system 1, the vehicle power supply amount display unit 72 displays the words "Power Supplying" and the value of the power supply amount in numbers. When the vehicle battery LB is not supplying power to the battery storage system 1, the vehicle power supply amount display unit 72 displays the supplied power amount as "0.0 kW" in a lighter colored number than when the vehicle battery LB is supplying power to the battery storage system 1.

[0085] The system status display unit 80 indicates the operating status of the storage battery system 1. Specifically, the system status display unit 80 displays whether the storage battery system 1 is operating in independent operation or normal operation. When the storage battery system 1 is operating in independent operation, the system status display unit 80 displays the text "independent operation" as an independent operation display indicating that the storage battery system 1 is operating in independent operation. On the other hand, when the storage battery system 1 is operating normally, the system status display unit 80 displays the text "in operation" as a normal operation display indicating that the storage battery system 1 is operating normally.

[0086] Furthermore, the system status display unit 80 is configured to be able to change the display format depending on whether the storage battery system 1 is operating in an autonomous mode or in a normal mode. Specifically, the system status display unit 80 is configured so that the color of the text used to display "independent operation" when the storage battery system 1 is operating in an autonomous mode is different from the color of the text used to display "in operation" when the storage battery system 1 is operating in a normal mode.

[0087] Note that if it is possible to indicate that the operating state of the battery storage system 1 is an autonomous operating state, it may be displayed with characters, figures, symbols, etc. different from "autonomous operation." Also, if it is possible to indicate that the operating state of the battery storage system 1 is a normal operating state, it may be displayed with characters, figures, symbols, etc. different from "operating."

[0088] Next, an example of the control process executed by the control unit 6 and the image control unit 13 will be described with reference to the flowcharts shown in Figures 3 to 9. Each control process shown in Figures 3 to 9 is repeatedly executed at a predetermined control period when the storage battery system 1 operates.

[0089] First, a system state determination process P1 shown in FIG. 3 among the control processes executed by the control unit 6 will be described. The system state determination process P1 is executed to determine the content to be displayed on the system state display unit 80. In step S11, the control unit 6 determines whether the storage battery system 1 is in normal operation. Specifically, the control unit 6 determines that the storage battery system 1 is in normal operation when the storage battery system 1 is operating in a state where it is electrically connected to the power grid PS. In contrast, the control unit 6 does not determine that the storage battery system 1 is in normal operation when the storage battery system 1 is not electrically connected to the power grid PS and is operating in a state where it is unable to buy or sell electricity. An example of a case where the storage battery system 1 is operating in a state where it is not electrically connected to the power grid PS is when the storage battery system 1 is operating using power supplied from the solar cell SB.

[0090] If it is determined that the storage battery system 1 is in normal operation, in step S12 the control unit 6 transmits normal operation information indicating that the storage battery system 1 is in normal operation to the display device 10 via the communication unit 7. On the other hand, if it is not determined that the storage battery system 1 is in normal operation, in step S13 the control unit 6 transmits independent operation information indicating that the storage battery system 1 is in an independent operation state to the display device 10 via the communication unit 7.

[0091] Next, of the control processes executed by the control unit 6, the battery determination process P2 shown in Fig. 4 will be described. The battery determination process P2 is executed to determine the content to be displayed on the charge / discharge direction display unit 31 and the charge / discharge display unit 32. In step S21, the control unit 6 acquires information related to the charge amount of the storage battery B from the storage battery B. The information related to the charge amount of the storage battery B acquired by the control unit 6 from the storage battery B includes information on the amount of power supplied to the storage battery B or the amount of power discharged from the storage battery B, and the charge amount of the storage battery B.

[0092] In step S22, the control unit 6 calculates the remaining time for which power can be supplied from the storage battery B to each electric appliance EP based on the current charge amount of the storage battery B and the amount of power supplied to each electric appliance EP. Then, in step S23, the control unit 6 determines whether the storage battery B is being charged. If it is determined that the storage battery B is being charged, in step S24, the control unit 6 determines whether the solar battery SB is the only power supply source to the storage battery system 1.

[0093] If it is determined that the only power supply source to the storage battery system 1 is the solar cell SB, then in step S25 the control unit 6 transmits first charge state information to the display device 10 via the communication unit 7. The first charge state information includes the calculated remaining time for which power can be supplied to each electrical device EP, information that the only power supply source to the storage battery system 1 is the solar cell SB, information on the amount of power supplied from the solar cell SB to the storage battery B, and information on the amount of charge in the storage battery B.

[0094] On the other hand, if it is not determined that the power supply source to the storage battery system 1 is only the solar battery SB, in step S26 the control unit 6 transmits second charge state information to the display device 10 via the communication unit 7. The second charge state information includes the calculated remaining time for which power can be supplied to each electrical appliance EP, information that the power supply source to the storage battery system 1 includes sources other than the solar battery SB, information on the total amount of power supplied to the storage battery B including the amount of power supplied from sources other than the solar battery SB, and information on the amount of charge of the storage battery B. Note that the information that the power supply source to the storage battery system 1 includes sources other than the solar battery SB is information indicating a state in which the power supply source to the storage battery system 1 includes at least one of the grid power supply PS and the vehicle battery LB.

[0095] Here, when it is determined in step S23 that the storage battery B is not being charged, it means that power is not being supplied to the storage battery B and the storage battery B is discharging the power that it has charged to each electrical appliance EP. Therefore, when it is determined in step S23 that the storage battery B is not being charged, in step S27 the control unit 6 transmits to the display device 10 via the communication unit 7 discharge state information including information on the amount of power being discharged from the storage battery B, information on the amount of charge in the storage battery B, and information on the calculated remaining time for which power can be supplied to each electrical appliance EP.

[0096] Next, a description will be given of the power consumption determination process P3 shown in Fig. 5, which is one of the control processes executed by the control unit 6. The power consumption determination process P3 is executed to determine the content to be displayed on the consumption display unit 42. In step S31, the control unit 6 acquires, as the current power consumption, information on the total amount of power consumed by each electrical appliance EP, which is a load connected to the storage battery system 1, when this process is executed. Furthermore, the control unit 6 acquires, on the day when this process is executed, information on the integrated value of the amount of power consumed by each electrical appliance EP on that day and information on the integrated value of the amount of power generated by the solar cell SB on that day.

[0097] In step S32, the control unit 6 calculates the self-sufficiency rate of the battery system 1 based on information on the integrated value of the amount of power consumed by each electric appliance EP and information on the integrated value of the amount of power generated by the solar battery SB.

[0098] In step S33, the control unit 6 transmits to the display unit 12 load information including the acquired information on the current amount of power consumption and the calculated information on the self-sufficiency rate.

[0099] Next, of the control processes executed by the control unit 6, a grid power supply determination process P4 shown in Fig. 6 will be described. The grid power supply determination process P4 is executed to determine the content to be displayed in the grid icon 50, the grid direction display unit 51, and the grid trading amount display unit 52. In step S41, the control unit 6 determines whether the storage battery system 1 is purchasing power from the power company. If it is determined that the storage battery system 1 is purchasing power from the power company, in step S42 the control unit 6 acquires information on the amount of power to be purchased from the grid power supply PS. Then, in step S43, the control unit 6 transmits power purchase information including information that the storage battery system 1 is in a power purchasing state and information on the amount of power to be purchased to the display device 10 via the communication unit 7.

[0100] On the other hand, if it is determined that the storage battery system 1 is not in a state of purchasing power from the power company, the control unit 6 determines in step S44 whether the storage battery system 1 is in a state of selling power to the power company. If it is determined that the storage battery system 1 is in a state of selling power to the power company, the control unit 6 acquires information on the amount of power to be sold to the grid power supply PS in step S45. Then, in step S46, the control unit 6 transmits power selling information including information that the storage battery system 1 is in a state of selling power and information on the amount of power to be sold to the display device 10 via the communication unit 7.

[0101] Furthermore, if it is not determined that the storage battery system 1 is in a state of selling electricity to the electric power company, in step S47, the control unit 6 transmits non-trading state information indicating that the storage battery system 1 is not in a state of purchasing electricity and is not in a state of selling electricity to the display device 10 via the communication unit 7.

[0102] Next, of the control processes executed by the control unit 6, a solar cell determination process P5 shown in Fig. 7 will be described. The solar cell determination process P5 is executed to determine the content to be displayed on the sun direction display unit 61 and the solar power supply amount display unit 62. In step S51, the control unit 6 determines whether the solar cell SB is generating power. If it is determined that the solar cell SB is generating power, in step S52 the control unit 6 acquires information on the amount of power generated by the solar cell SB and supplied to the storage battery system 1. Then, in step S53, the control unit 6 transmits power generation information including information on the amount of power supplied by the solar cell SB to the storage battery system 1 to the display device 10 via the communication unit 7.

[0103] On the other hand, if it is not determined that the solar cell SB is generating power, in step S54, the control unit 6 transmits non-power generation information, including information indicating that power cannot be obtained from the solar cell SB, to the display device 10 via the communication unit 7.

[0104] Next, of the control processes executed by the control unit 6, a vehicle power supply determination process P6 shown in Fig. 8 will be described. The vehicle power supply determination process P6 is executed to determine the content to be displayed in the vehicle icon 70, the vehicle direction display unit 71, and the vehicle power supply amount display unit 72. In step S61, the control unit 6 determines whether the storage battery system 1 is operating normally. If it is determined that the storage battery system 1 is operating normally, in step S62 the control unit 6 acquires information on the amount of power supplied from the vehicle battery LB to the storage battery system 1. Then, in step S63, the control unit 6 transmits supply power information including information on the amount of power supplied from the vehicle battery LB to the display device 10 via the communication unit 7.

[0105] On the other hand, if it is not determined in step S61 that the storage battery system 1 is operating normally, the processes in steps S62 and S63 are skipped.

[0106] Next, an image determination process P7 shown in Fig. 9 executed by the image control unit 13 will be described. The image determination process P7 is executed when the display device 10 receives various information from the control unit 6. In step S71, the image control unit 13 acquires various information transmitted by the control unit 6 in each control process shown in Figs. 3 to 8. In step S72, the image control unit 13 determines whether the storage battery system 1 is in a normal operation state based on the acquired normal operation information or autonomous operation information.

[0107] If it is determined that the storage battery system 1 is in a normal operating state, in step S73, the image control unit 13 causes the system status display unit 80 of the display unit 12 to display the text "In operation." Then, the image control unit 13 causes the vehicle icon 70 and the vehicle direction display unit 71 of the display unit 12 to be displayed in a lighter color than when the storage battery system 1 is operating in an autonomous mode. That is, when the storage battery system 1 is in a normal operating state, the display unit 12 displays the vehicle icon 70 and the vehicle direction display unit 71 in an off state. Furthermore, the image control unit 13 skips the processes of steps S75 to S78.

[0108] On the other hand, if it is not determined that the storage battery system 1 is in a normal operation state, in step S75, the image control unit 13 causes the system status display unit 80 of the display unit 12 to display the words "autonomous operation." Then, in step S76, the image control unit 13 causes the vehicle icon 70 and the vehicle direction display unit 71 of the display unit 12 to be displayed in a darker color than when the storage battery system 1 is in normal operation. That is, the display unit 12 displays the vehicle icon 70 and the vehicle direction display unit 71 in an on state. The vehicle direction display unit 71 is displayed in orange. Furthermore, the image control unit 13 causes the vehicle power supply amount display unit 72 to display the words "power supplying," and also displays the value of the amount of power supplied from the vehicle battery LB to the storage battery system 1.

[0109] In step S77, the image control unit 13 determines whether or not an operation to request display of a method for connecting the storage battery system 1 and the vehicle battery LB has been performed by the user of the storage battery system 1. Specifically, the image control unit 13 determines whether or not the vehicle icon 70 has been pressed by the user of the storage battery system 1. If it is determined that an operation to request display of a method for connecting the storage battery system 1 and the vehicle battery LB has been performed, in step S78, the image control unit 13 causes the display unit 12 to display an image indicating a pre-registered method for connecting the storage battery system 1 and the vehicle battery LB.

[0110] On the other hand, if it is not determined that an operation to request display of the method for connecting the storage battery system 1 and the vehicle battery LB has been performed, the image control unit 13 skips the process of step S78.

[0111] In step S81, the image control unit 13 determines whether or not the storage battery B is being charged based on any one of the first charge state information, the second charge state information, or the discharge state information. If it is determined that the storage battery B is being charged, in step S82, the image control unit 13 causes the remaining charge display unit 32a of the display unit 12 to display the remaining charge of the storage battery B. Furthermore, the image control unit 13 causes the charge / discharge amount display unit 32b of the display unit 12 to display the words "Charging" and the value of the amount of power supplied to the storage battery B.

[0112] Then, in step S83, the image control unit 13 determines whether the solar battery SB is the only power supply source to the storage battery system 1. If it is determined that the solar battery SB is the only power supply source to the storage battery system 1, in step S84, the image control unit 13 causes the display unit 12 to display the first charging state. Specifically, the image control unit 13 turns on the charging arrow 31a on the display unit 12 and displays it in blue.

[0113] On the other hand, if it is not determined that the solar cell SB is the only power supply source to the storage battery system 1, in step S85, the image control unit 13 displays the second charging state on the display unit 12. Specifically, the image control unit 13 displays the charging arrow 31a on the display unit 12 in a color different from the color of the charging arrow 31a when the solar cell SB is the only power supply source to the storage battery system 1. In this embodiment, the image control unit 13 turns on the charging arrow 31a and displays it in orange.

[0114] If it is not determined in step S81 that storage battery B is being charged, then in step S86, image control unit 13 causes display unit 12 to display the discharging state. Specifically, image control unit 13 causes remaining charge display unit 32a of display unit 12 to display the remaining charge of storage battery B. Furthermore, image control unit 13 causes charging / discharging amount display unit 32b of display unit 12 to display the words "Discharging," as well as the value of the power supply amount discharging from storage battery B and the remaining time calculated by control unit 6.

[0115] In step S89, the image control unit 13 causes the consumption display section 42 of the display unit 12 to display the total amount of power consumption and the self-sufficiency rate of each electric appliance EP based on the load information.

[0116] In step S90, the image control unit 13 determines whether the storage battery system 1 is in a power purchasing state based on any one of the power purchasing information, the power selling information, and the non-trading state information. If it is determined that the storage battery system 1 is in a power purchasing state, in step S91, the image control unit 13 displays a power purchasing indication. Specifically, the image control unit 13 turns on the grid icon 50 and the power purchasing arrow 51a on the display unit 12. The image control unit 13 also displays the words "Purchasing Power" and the value of the amount of power purchased from the grid power source PS on the grid trading amount display unit 52 on the display unit 12. The power purchasing arrow 51a is displayed in orange.

[0117] If it is determined that the storage battery system 1 is not in the power purchasing state, in step S92, the image control unit 13 determines whether the storage battery system 1 is in the power selling state. If it is determined that the storage battery system 1 is in the power selling state, in step S93, the image control unit 13 displays a power selling indication. Specifically, the image control unit 13 turns on the power selling arrow 51b on the display unit 12. Furthermore, the image control unit 13 displays the words "Power selling" on the grid buying / selling amount display unit 52 on the display unit 12, and also displays the value of the amount of power to be sold to the grid power source PS.

[0118] On the other hand, if it is determined that the storage battery system 1 is not in the power selling state, in step S94, the image control unit 13 displays the grid icon 50, the power purchase arrow 51a, and the power selling arrow 51b in a lighter color than when the storage battery system 1 is in the power buying state or the power selling state. That is, the display unit 12 displays the grid icon 50, the power purchase arrow 51a, and the power selling arrow 51b in the off state.

[0119] In step S95, the image control unit 13 determines whether the solar cell SB is in a power generating state based on the power generation information or non-power generation information. If it is determined that the solar cell SB is in a power generating state, in step S96, the image control unit 13 causes the display unit 12 to display power generation. Specifically, the image control unit 13 turns on the sun icon 60 and the sun direction display unit 61 of the display unit 12. The image control unit 13 also causes the solar power supply amount display unit 62 of the display unit 12 to display the words "Power generation in progress" and the value of the amount of power generated by the solar cell SB. The sun direction display unit 61 is displayed in blue.

[0120] On the other hand, if it is not determined that solar cell SB is in a power generating state, in step S97, image control unit 13 causes display unit 12 to display a non-power generating state. Specifically, image control unit 13 turns on sun icon 60 and sun direction display unit 61 of display unit 12, just as when solar cell SB is in a power generating state. However, image control unit 13 causes solar power supply amount display unit 62 of display unit 12 to display the amount of supplied power as "0.0 kW" in lighter text than when solar cell SB is generating power.

[0121] Next, an example of a display screen displayed by the display unit 12 through the control process shown in FIG. 9 will be described with reference to FIG. 2 and FIGS. 11 to 16. FIG.

[0122] FIG. 2 is an example of an image displayed when the display device 10 receives normal operation information, second state of charge information, load information, power purchase information, and power generation information from the control unit 6. In FIG.

[0123] In such a case, as shown in FIG. 2, the display unit 12 displays the text "driving" in the system status display section 80, and also turns on the charging arrow 31a and displays it in orange.

[0124] Furthermore, the display unit 12 displays the remaining charge of the storage battery B in the remaining charge display section 32a, and displays the words "charging" and the value of the amount of power supplied to the storage battery B in the charge / discharge amount display section 32b. Then, the display unit 12 displays the total value of the amount of power consumed by each electric device EP and the self-sufficiency rate in the consumption amount display section 42.

[0125] The display unit 12 also turns on the grid icon 50 and the power purchase arrow 51a, displays them in orange, and in the grid buying / selling amount display unit 52, displays the words "Power purchasing" and the value of the amount of power purchased from the grid power source PS. The display unit 12 then turns on the sun icon 60 and the sun direction display unit 61, displays them in blue, and in the solar power supply amount display unit 62, displays the words "Power generation in progress" and the value of the amount of power generated by the solar battery SB.

[0126] When the storage battery system 1 is in a normal operating state, power is not supplied from the vehicle battery LB to the storage battery system 1. Therefore, when the storage battery system 1 is in a normal operating state, the display unit 12 displays the vehicle icon 70 and the vehicle direction display unit 71 in an off state.

[0127] 11 shows an example of a screen displayed by the display unit 12 when the amount of power supplied from the solar cell SB to the storage battery system 1 exceeds the total amount of power consumed by the electrical appliances EP connected to the storage battery system 1. In this case, the storage battery system 1 sells the surplus power, which is the amount of power consumed by the electrical appliances EP and the amount of power used to charge the storage battery B relative to the amount of power supplied from the solar cell SB, to the power company. The storage battery system 1 also uses this surplus power to charge the storage battery B. The solar cell SB is then the only power supply source for the storage battery system 1.

[0128] In such a case, the control unit 6 transmits the first charging state information to the display device 10 instead of the second charging state information in the example shown in Fig. 2. The control unit 6 also transmits the power selling information to the display device 10 instead of the power purchasing information.

[0129] 11, the display unit 12 turns on the charging arrow 31a and displays it in blue. The display unit 12 also turns on the power selling arrow 51b and displays it in blue, and displays the words "Power selling" in the grid selling amount display unit 52, as well as the value of the amount of power sold to the grid power source PS.

[0130] 12 shows an example of a screen displayed by the display unit 12 when no power is supplied from the solar cell SB. In such a case, the only power source for the storage battery system 1 is purchased power. Therefore, the control unit 6 transmits non-power generation information to the display device 10 instead of the power generation information in the example shown in FIG.

[0131] Then, the display unit 12 displays the sun direction display unit 61 in the off state, as shown in Fig. 12. Then, the display unit 12 displays the supplied power amount "0.0 kW" in the solar power supply amount display unit 62 in characters that are lighter in color than when the solar battery SB is generating power.

[0132] 13 shows an example of a screen displayed by the display unit 12 when power is supplied from the vehicle battery LB to the storage battery system 1 while the storage battery system 1 is not electrically connected to the power grid PS, such as during a power outage. That is, when the screen shown in FIG. 13 is displayed, the storage battery system 1 is in an autonomous operation state. In such a case, the control unit 6 transmits supply power information to the display device 10.

[0133] In such a case, the control unit 6 transmits the autonomous operation information to the display device 10 instead of the normal operation information in the example shown in Fig. 2. The control unit 6 also transmits the discharge state information to the display device 10 instead of the second charge state information. The control unit 6 then transmits the non-trading state information to the display device 10 instead of the power purchasing information.

[0134] Then, the display unit 12 displays the words "independent operation" in the system status display unit 80, as shown in Fig. 13. The display unit 12 displays the words "independent operation" in a color different from the color of the words "in operation" that is displayed when the storage battery system 1 is in normal operation. For example, by displaying the words "independent operation" in a color (e.g., orange) that is more noticeable than the words "in operation," it is possible to make it easier for users of the storage battery system 1 to recognize that the storage battery system 1 is in an independent operation state. Note that in Fig. 13, for convenience, the color that indicates an independent operation state is hatched.

[0135] Furthermore, display unit 12 turns on discharging arrow 31b and displays it in blue. Then, display unit 12 displays the remaining charge of storage battery B in remaining charge display unit 32a, and displays the words "Discharging" in charge / discharge amount display unit 32b, as well as the value of the power supply amount discharging from storage battery B and the calculated remaining time. Then, display unit 12 turns off grid icon 50, power purchase arrow 51a, and power sale arrow 51b.

[0136] Furthermore, when the storage battery system 1 is in an autonomous operation state, the display unit 12 displays the vehicle icon 70 and the vehicle direction display unit 71 in an on state. The vehicle direction display unit 71 is displayed in orange. Furthermore, the display unit 12 displays the words "Power supplying" in the vehicle power supply amount display unit 72, and also displays the value of the amount of power supplied from the vehicle battery LB to the storage battery system 1.

[0137] In this case, when there is a request to display on the display unit 12 a method for connecting the storage battery system 1 and the vehicle battery LB, the display unit 12 displays an image showing the method for connecting the storage battery system 1 and the vehicle battery LB, as shown in Fig. 14 to Fig. 16. The images shown in Fig. 14 to Fig. 16 are examples of images showing the method for connecting the storage battery system 1 and the vehicle battery LB, and show, for example, a connection diagram between the adapter AD and the AC / DC converter 3, a connection diagram for connecting the adapter AD to an AC outlet provided in the vehicle compartment, and a diagram showing how the user operates the vehicle when connecting the various connection lines.

[0138] As described above, when the storage battery system 1 is operating in autonomous mode, the image control unit 13 of the display device 10 of this embodiment causes the display unit 12 to display that there is a vehicle battery LB connectable to the storage battery system 1. Then, the image control unit 13 causes the vehicle icon 70 indicating that there is a vehicle battery LB connectable to the storage battery system 1 to be displayed in a form different from the vehicle icon 70 indicating that there is a vehicle battery LB connectable to the storage battery system 1 when the storage battery system 1 is operating in normal mode.

[0139] This allows the user of the storage battery system 1 to recognize the presence of the vehicle battery LB that can be connected to the storage battery system 1 when the storage battery system 1 is in an independent operation state.

[0140] This makes it possible to encourage users who are unaware or have forgotten that the power stored in the vehicle battery LB can be used for the storage battery system 1 to use the power stored in the vehicle battery LB. Therefore, when the storage battery system 1 is in an autonomous operation state, it is possible to reduce the opportunity loss of extending the usable time of the storage battery B due to the vehicle battery LB not being connected to the storage battery system 1.

[0141] Furthermore, according to the above embodiment, the following effects can be obtained.

[0142] (1) In the above embodiment, the image control unit 13 displays the vehicle icon 70, which indicates that there is a vehicle battery LB that can be connected to the storage battery system 1, in a graphic that resembles the shape of a vehicle.

[0143] This makes it easier for the user of the storage battery system 1 to visually recognize the presence of the vehicle battery LB, making it easier for the user to recognize the presence of the vehicle battery LB that can be connected to the storage battery system 1.

[0144] (2) In the above embodiment, the image control unit 13 causes the display unit 12 to display vehicle power supply direction information indicating the flow direction of power when it flows from the vehicle battery LB to the storage battery B. In addition, the image control unit 13 causes the display unit 12 to display vehicle power supply amount information regarding the amount of power supplied from the vehicle battery LB to the storage battery B.

[0145] This makes it easier for a user of the storage battery system 1 to recognize that power is being supplied from the vehicle battery LB to the storage battery B.

[0146] (3) In the above embodiment, the image control unit 13 causes the vehicle power supply amount information to be displayed numerically on the vehicle power supply amount display unit 72 of the display unit 12. Furthermore, the image control unit 13 causes the color of the power supply amount to be displayed when power is being supplied from the vehicle battery LB to the storage battery system 1 to be different from the color of the power supply amount to be displayed when power is not being supplied from the vehicle battery LB to the storage battery system 1.

[0147] This allows the user of the storage battery system 1 to visually recognize the amount of power being supplied from the vehicle battery LB to the storage battery B, making it even easier for the user to recognize that power is being supplied from the vehicle battery LB to the storage battery B.

[0148] (4) In the above embodiment, the image control unit 13 displays the vehicle power supply direction information as an arrow on the vehicle direction display unit 71 of the display unit 12. Furthermore, the image control unit 13 displays the vehicle power supply direction information in a color different from the color of the vehicle power supply direction information displayed when power is being supplied from the vehicle battery LB to the storage battery system 1.

[0149] This allows the user of the storage battery system 1 to visually recognize the flow of power when it is being supplied from the vehicle battery LB to the storage battery B, making it even easier for the user to recognize that power is being supplied from the vehicle battery LB to the storage battery B.

[0150] (5) In the above embodiment, the image control unit 13 causes the display unit 12 to display whether the storage battery system 1 is operating in an independent operation state or a normal operation state. The image control unit 13 then causes the display mode of the independent operation display, which indicates that the storage battery system 1 is operating in an independent operation state, to be different from the display mode of the normal operation display, which indicates that the storage battery system 1 is operating in a normal operation state.

[0151] With this, when the storage battery system 1 is in an autonomous operation state, the display device 10 can easily visually make the user of the storage battery system 1 recognize that the storage battery system 1 is in an autonomous operation state. Therefore, when the storage battery system 1 is in an autonomous operation state, the display device 10 can further encourage users who are aware that the power charged in the vehicle battery LB can be used for the storage battery system 1 to use the power charged in the vehicle battery LB.

[0152] (6) In the above embodiment, the image control unit 13 causes the display unit 12 to display the autonomous operation display mode in the text "autonomous operation." The image control unit 13 also causes the display unit 12 to display the normal operation display mode in the text "operating." The image control unit 13 also causes the color of the text indicating the autonomous operation display to be different from the color of the text indicating the normal operation display.

[0153] This allows the display device 10 to make it easier for the user of the storage battery system 1 to visually recognize that the storage battery system 1 is in an autonomous operation state when the storage battery system 1 is in an autonomous operation state, thereby further encouraging the user to utilize the power charged in the vehicle battery LB.

[0154] (7) In the above embodiment, the image control unit 13 causes the display unit 12 to display a method for connecting the storage battery system 1 and the vehicle battery LB.

[0155] This allows a user who is aware that the power stored in the vehicle battery LB can be used for the storage battery system 1, but has forgotten how to connect the storage battery system 1 and the vehicle battery LB, to connect the vehicle battery LB to the storage battery system 1. This further encourages the use of the power stored in the vehicle battery LB.

[0156] (8) In the above embodiment, the display unit 12 has a display request unit that requests the display of a connection method. The display request unit is configured with a vehicle icon 70 that indicates the presence of a vehicle battery LB that can be connected to the storage battery system 1 and is displayed on the display unit 12.

[0157] This allows the user of the storage battery system 1 to intuitively perform a request for a connection method more easily than in a case where such a configuration is not used.

[0158] (9) In the above embodiment, storage battery B can be charged with power supplied from solar battery SB provided in storage battery system 1. Furthermore, image control unit 13 causes display unit 12 to display, as charging arrow 31a, a charging state in which storage battery B is being charged with power supplied from at least one of power grid power supply PS, solar battery SB, and vehicle battery LB. Image control unit 13 causes the display form of charging arrow 31a when storage battery B is being charged with power supplied only from solar battery SB to be displayed in a different form from the display form of charging arrow 31a when storage battery B is being charged with power including at least one of power supplied from power grid power supply PS and power supplied from vehicle battery LB.

[0159] This makes it easy for users of the storage battery system 1 to visually recognize whether the method of charging the storage battery B is exclusively power generation by the solar cell SB, which does not emit carbon dioxide during power generation. Therefore, when the method of charging the storage battery B is exclusively power generation by the solar cell SB, it is easy for users of the storage battery system 1 to realize that they are contributing to environmental improvement.

[0160] (10) In the above embodiment, the image control unit 13 displays the charging state as an arrow on the display unit 12. Furthermore, the image control unit 13 displays the color of the charging arrow 31a when charging is being performed using only power supplied from the solar battery SB in a color that is different from the color of the charging arrow 31a when charging is being performed using power that includes at least one of power supplied from the power grid PS and power supplied from the vehicle battery LB.

[0161] This allows users of the storage battery system 1 to easily visually recognize that the only power supply source when charging the storage battery B is power generated by the solar battery SB, making it easier for them to realize their contribution to environmental improvement.

[0162] In this embodiment, the sun direction display unit 61 is displayed in blue, which is the color of the charging arrow 31a when the only power supplied to the storage battery B is power supplied from the solar battery SB. The sun direction display unit 61 is displayed in a color different from the color of the charging arrow 31a and the color of the vehicle direction display unit 71 when the power supply source to the storage battery system 1 includes at least one of the grid power supply PS and the vehicle battery LB.

[0163] Therefore, it is easy to recognize that of the solar cell SB, the power grid PS, and the vehicle battery LB, which are power supply sources to the storage battery system 1, the solar cell SB is a power supply source that does not emit carbon dioxide when generating power.

[0164] (Other embodiments) Representative embodiments of the present disclosure have been described above, but the present disclosure is not limited to the above-described embodiments and can be modified in various ways, for example, as follows.

[0165] In the above embodiment, an example has been described in which the vehicle icon 70 indicating the presence of a vehicle battery LB connectable to the storage battery system 1 is displayed as a graphic that resembles the shape of a vehicle, but this is not limiting. For example, the vehicle icon 70 may be displayed as a graphic other than a graphic that resembles the shape of a vehicle, such as a graphic that resembles the shape of a rectangular parallelepiped battery, or may be displayed as text such as "vehicle" or "battery."

[0166] In the above embodiment, an example has been described in which image control unit 13 displays the vehicle power feeding direction information and the vehicle power feeding amount information on display unit 12. However, the present invention is not limited to this. For example, image control unit 13 may be configured to display only one of the vehicle power feeding direction information and the vehicle power feeding amount information on display unit 12, or may be configured to display neither the vehicle power feeding direction information nor the vehicle power feeding amount information on display unit 12.

[0167] In the above-described embodiment, the image control unit 13 displays the vehicle power supply amount information as a number related to the amount of power on the vehicle power supply amount display unit 72. The image control unit 13 also displays the amount of power supply when power is being supplied from the vehicle battery LB to the storage battery system 1 in a color different from the color of the amount of power supply when power is not being supplied from the vehicle battery LB to the storage battery system 1, but the present invention is not limited to this.

[0168] For example, the image control unit 13 may display the amount of power supply in the same color when power is being supplied from the vehicle battery LB to the storage battery system 1 and when power is not being supplied. The image control unit 13 may also be configured to display the amount of power supply in a different size when power is being supplied from the vehicle battery LB to the storage battery system 1 from the amount of power supply when power is not being supplied. The image control unit 13 may also be configured to always display the amount of power supply when power is being supplied from the vehicle battery LB to the storage battery system 1, and to flash the amount of power supply when power is not being supplied.

[0169] In the above-described embodiment, the image control unit 13 displays the vehicle power supply direction information as an arrow on the vehicle direction display unit 71. The image control unit 13 also displays the color of the vehicle direction display unit 71 when power is being supplied from the vehicle battery LB to the storage battery system 1 in a color different from the color of the vehicle direction display unit 71 when power is not being supplied, but the present invention is not limited to this.

[0170] For example, the image control unit 13 may display the vehicle direction display unit 71 in the same color when power is being supplied from the vehicle battery LB to the storage battery system 1 and when power is not being supplied. The image control unit 13 may also be configured to display the vehicle direction display unit 71 in a size different from that when power is being supplied from the vehicle battery LB to the storage battery system 1. The image control unit 13 may also be configured to always display the vehicle direction display unit 71 when power is being supplied from the vehicle battery LB to the storage battery system 1, and to flash the vehicle direction display unit 71 when power is not being supplied.

[0171] In the above-described embodiment, the image control unit 13 causes the display unit 12 to display whether the operation of the storage battery system 1 is in an autonomous operation state or a normal operation state. An example has been described in which the image control unit 13 displays the autonomous operation in a form different from the normal ...

[0172] For example, image control unit 13 may be configured not to cause display unit 12 to display whether storage battery system 1 is in an autonomous operation state or a normal operation state. Image control unit 13 may also be configured to display the autonomous operation display mode in the same mode as the normal operation display mode. Specifically, image control unit 13 may be configured to display the color of the text indicating the autonomous operation display mode in the same color as the text indicating the normal operation display mode.

[0173] In the above-described embodiment, an example has been described in which the image control unit 13 displays the connection method between the storage battery system 1 and the vehicle battery LB on the display unit 12, but the present invention is not limited to this. For example, the image control unit 13 may be configured not to display the connection method between the storage battery system 1 and the vehicle battery LB on the display unit 12. Furthermore, in the above-described embodiment, the image control unit 13 may be configured to display the connection method between the storage battery system 1 and the vehicle battery LB on a display device separate from the display unit 12.

[0174] In the above-described embodiment, the display unit 12 has a display request unit that requests the display of the connection method. The example has been described in which the display request unit is configured with the vehicle icon 70 that is displayed on the display unit 12 and indicates a state in which the vehicle battery LB is not connected to the storage battery system 1, but the present invention is not limited to this.

[0175] For example, the display unit 12 may have an input button, separate from the vehicle icon 70, for requesting the display of the connection method.

[0176] In the above-described embodiment, the image control unit 13 causes the display unit 12 to display, as the charging arrow 31a, the charging state in which the storage battery B is being charged by power supplied from at least one of the power grid PS, the solar battery SB, and the vehicle battery LB. The image control unit 13 also describes an example in which the display form of the charging arrow 31a when the storage battery B is being charged only with power supplied from the solar battery SB is different from the display form of the charging arrow 31a when the storage battery B is being charged with power including at least one of the power supplied from the power grid PS and the power supplied from the vehicle battery LB, but the present invention is not limited to this.

[0177] For example, image control unit 13 may be configured not to display charging arrow 31a on display unit 12. Image control unit 13 may also be configured to display charging arrow 31a in the same manner as charging arrow 31a when the power supplied to storage battery B is only power supplied from solar battery SB, as the display manner of charging arrow 31a when the power supplied to storage battery B includes at least one of power supplied from system power supply PS and power supplied from vehicle battery LB.

[0178] In the above-described embodiment, the image control unit 13 displays the charging arrow 31a indicating the charging state as a graphic arrow on the display unit 12. Also, an example has been described in which the image control unit 13 displays the color of the charging arrow 31a when charging is being performed using only power supplied from the solar battery SB in a color that is different from the color of the charging arrow 31a when charging is being performed using power that includes at least one of power supplied from the power grid PS and power supplied from the vehicle battery LB, but the present invention is not limited to this.

[0179] For example, the image control unit 13 may display the charging arrow 31a in the same color when charging is being performed using only power supplied from the solar cell SB and when charging is being performed using power including at least one of power supplied from the grid power supply PS and power supplied from the vehicle battery LB. The image control unit 13 may also be configured to display the charging arrow 31a in a size different from that when charging is being performed using only power supplied from the solar cell SB compared to the size of the charging arrow 31a when charging is being performed using power including at least one of power supplied from the grid power supply PS and power supplied from the vehicle battery LB. The image control unit 13 may also be configured to constantly display the charging arrow 31a when charging is being performed using only power supplied from the solar cell SB, and to flash the charging arrow 31a when charging is being performed using power including at least one of power supplied from the grid power supply PS and power supplied from the vehicle battery LB.

[0180] In the above-described embodiment, an example has been described in which the vehicle battery LB is connected to the power conditioner 5 via the AC / DC converter 3, and AC power output from the vehicle is converted into DC power and supplied to the power conditioner 5. However, the present invention is not limited to this. For example, the storage battery system 1 may be configured not to include the AC / DC converter 3, and DC power output from the vehicle battery LB may be supplied to the power conditioner 5.

[0181] In the above embodiment, an example has been described in which the storage battery system 1 is configured to be able to receive power from the vehicle battery LB only when the storage battery system 1 is operating in an independent mode that is not electrically connected to the power grid PS, such as during a power outage, but this is not limiting. For example, the storage battery system 1 may be configured to be able to receive power from the vehicle battery LB even when the storage battery system 1 is operating in a normal mode that is electrically connected to the power grid PS.

[0182] In the above-described embodiments, it goes without saying that the elements constituting the embodiments are not necessarily essential unless they are specifically stated as essential or are clearly considered essential in principle.

[0183] In the above-described embodiments, when numerical values ​​such as the number, values, amounts, ranges, etc. of components of the embodiments are mentioned, they are not limited to the specific numbers unless they are specifically stated as essential or are clearly limited to a specific number in principle.

[0184] In the above-described embodiments, when referring to the shapes, positional relationships, etc. of components, etc., the shapes, positional relationships, etc. are not limited to those unless otherwise specified or when they are fundamentally limited to specific shapes, positional relationships, etc. [Explanation of symbols]

[0185] 1. Battery storage system 6 Control Unit 20 Display section B. Storage battery LB Vehicle Battery SB solar cell

Claims

1. A display device used in a storage battery system (1) having a storage battery (B) that is capable of charging power supplied from a system power supply (PS) and power supplied from a vehicle battery (LB) and supplying the charged power to a load, A display unit (12) for displaying an image; an image control unit (13) that controls an image to be displayed on the display unit, The storage battery system is capable of an independent operation in which it operates in a state where it is not electrically connected to the grid power supply, and a normal operation in which it operates in a state where it is electrically connected to the grid power supply, The image control unit is capable of causing the display unit to display the presence of a vehicle battery that can be connected to the storage battery system, and the display unit displays the presence of the vehicle battery in a different display format when the storage battery system is operating in the independent operation mode from the display format when the storage battery system is operating in the normal operation mode.

2. The display device according to claim 1 , wherein the image control unit displays the indication indicating the presence of the vehicle battery in a graphic that resembles a vehicle shape.

3. 3. The display device according to claim 1, wherein the image control unit causes the display unit to display at least one of vehicle power supply amount information relating to the amount of power supplied from the vehicle battery to the storage battery and vehicle power supply direction information indicating the direction in which power flows from the vehicle battery to the storage battery.

4. 4. The display device according to claim 3, wherein the image control unit causes the display unit to display the vehicle power supply amount information in numbers, and causes at least one of a color and a shape of the vehicle power supply amount information to be displayed when power is being supplied from the vehicle battery to the battery storage system to be different from a color and a shape of the vehicle power supply amount information to be displayed when power is not being supplied from the vehicle battery to the battery storage system.

5. 4. The display device according to claim 3, wherein the image control unit causes the display unit to display the vehicle power supply direction information using at least one of characters, figures, and symbols, and causes at least one of a color and a shape of the vehicle power supply direction information to be displayed when power is being supplied from the vehicle battery to the battery system to be different from a color and a shape of the vehicle power supply direction information to be displayed when power is not being supplied from the vehicle battery to the battery system.

6. The image control unit is capable of displaying on the display unit whether the storage battery system is operating in the independent operation state or the normal operation state, and the display format of the independent operation display indicating that the storage battery system is operating in the independent operation state is displayed in a different format from the normal operation display format indicating that the storage battery system is operating in the normal operation state.

7. The display device described in claim 6, wherein the image control unit displays the autonomous operation display and the normal operation display on the display unit using at least one of letters, figures, and symbols, and displays at least one of the color and shape of the autonomous operation display in a color and shape different from the color and shape of the normal operation display.

8. The display device according to claim 1 or 2, wherein the image control unit causes the display unit to display a method of connecting the storage battery system and the vehicle battery.

9. The display unit has a display request unit (70) that requests the display of the connection method, The display device according to claim 8 , wherein the display request unit is configured to display a display form on the display unit that indicates a state in which the vehicle battery and the storage battery system are not connected.

10. The storage battery can be charged by power supplied from a solar battery (SB) provided in the storage battery system, 3. The display device according to claim 1, wherein the image control unit is capable of causing the display unit to display a charging state of the storage battery when the storage battery is being charged by power supplied from at least one of the system power supply, the solar cell, and the vehicle battery, and causes the display form of the charging state to be displayed when the storage battery is being charged only by power supplied from the solar cell to be different from the display form of the charging state to be displayed when the storage battery is being charged by power including at least one of the power supplied from the system power supply and the power supplied from the vehicle battery.

11. 11. The display device according to claim 10, wherein the image control unit causes the display unit to display the charging state using at least one of letters, figures, and symbols, and causes at least one of the color and shape of the charging state to be displayed when charging is being performed using only power supplied from the solar cell to be different from the color and shape of the charging state to be displayed when charging is being performed using power including at least one of power supplied from the grid power supply and power supplied from the vehicle battery.

12. A display device used in a storage battery system (1) having a storage battery (B) that can charge power supplied from a system power supply (PS) and power supplied from a vehicle battery (LB) and supply the charged power to a load, a display unit (12) for displaying an image; A display program that functions as an image control unit (13) that controls an image to be displayed on the display unit, The storage battery system is capable of an independent operation in which it operates in a state where it is not electrically connected to the grid power supply, and a normal operation in which it operates in a state where it is electrically connected to the grid power supply, The image control unit is capable of causing the display unit to display the presence of a vehicle battery that can be connected to the storage battery system, and the display program causes the display form indicating the presence of the vehicle battery to be displayed when the storage battery system is operating in the autonomous operation mode to be different from the display form indicating the presence of the vehicle battery to be displayed when the storage battery system is operating in the normal operation mode.

Images