JP2015139331A - Power storage system, display device of power storage system, or display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which allows an operator to easily recognize whether or not a solar cell is connected with a power storage system.SOLUTION: A solar cell display part displays whether or not a solar cell is connected with a power storage system. The solar cell display part in a state where the solar cell is not connected with the power storage system displays the solar cell in a different color or a different shape from that of the solar cell display part in a state where the solar cell is connected with the power storage system.

Description

  The present invention relates to a display device capable of recognizing whether or not a solar cell is connected to a power storage system and a power storage system using the display device.

  In recent years, a power storage system including a secondary battery has been developed for the purpose of assisting a system power supply. For example, this power storage system supplies power to the load side in order to assist the system power supply. Furthermore, this power storage system is used for the purpose of supplying power to the load side in an emergency when the power supply from the system power supply is stopped.

  In such a power storage system, a system that links a solar cell to a system power source has been developed. In this case, the power storage system includes a power converter for supplying DC power output from the secondary battery and the solar battery to the AC power side of the system power supply.

JP2001-177999A JP2008-178282

  In the conventional power storage system, as shown in FIG. 4, when the user checks the current connection state of the solar battery, the user checks the numerical value of the photovoltaic power generation in the display device. However, since it is impossible to identify whether the solar cell is not connected or the solar cell is connected to the system but there is no output, there is a problem that the connected state of the solar cell cannot be accurately recognized. It was.

  This invention is made | formed in view of such a condition, The objective is to provide the technique which recognizes the connection state of the solar cell in an electrical storage system correctly.

  The display device of the present invention is a solar cell display unit that displays whether or not a solar cell is connected to a power storage system, and a solar cell display unit when the solar cell is not connected to the power storage system. Is displayed in a different color or shape from the solar cell display portion when the solar cell is connected to the power storage system.

  In the display device of the present invention, the remaining amount display unit that displays the state of the remaining amount of the secondary battery, the remaining amount display unit, and the solar cell display unit are displayed on the same screen.

  The display device of the present invention is a power converter display unit that displays a state of at least a power converter connected to a secondary battery, a system power source display unit that displays a state of a system power source, or a load state connected to a power storage system Any one of the load display parts which display is provided.

  When an abnormality is detected in the configuration corresponding to each display unit of the display device, the display device of the present invention is displayed in a color or shape different from that of the display unit when no abnormality is detected.

The power storage system of the present invention is a power storage system including a secondary battery and a display device that displays a state of the secondary battery, a remaining amount display unit that displays a remaining amount of the secondary battery, and a solar battery that is a power storage system And a solar cell display unit that displays whether or not the solar cell is connected to the solar cell display unit when the solar cell is not connected to the power storage system. It is displayed in a different color or shape from the solar cell display portion when it is in a state where it is in a state.

  The power storage system of the present invention includes at least a power converter display unit that displays a state of a power converter connected to a secondary battery or a system power source display unit that displays a state of a system power source or a load state connected to the power storage system When an abnormality is detected in the configuration corresponding to each display unit of the display device, the color or shape is different from that of the display unit when no abnormality is detected. Is displayed.

  The display method of the present invention is a solar cell display unit that displays whether or not a solar cell is connected to a power storage system, and a solar cell display unit when the solar cell is not connected to the power storage system. Is displayed in a different color or shape from the solar cell display portion when the solar cell is connected to the power storage system.

  The display device of the present invention and the power storage system using the display device can accurately recognize the connection state of solar cells connected to the power storage system.

It is the figure which showed the screen of the display apparatus of the one state in 1st embodiment of this invention. It is the figure which showed the screen of the display apparatus of the other state in 1st embodiment of this invention. It is the figure which showed the screen of the display apparatus in 2nd embodiment of this invention. It is the figure which showed the screen of the display apparatus in the conventional electrical storage system.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below embodies the technical idea of the present invention, and numerical values, layout shapes, and the like are not specified as follows.

  The power storage system is installed in industrial facilities, public facilities, commercial facilities, office buildings, residences, and the like. When the electric power company and the user adopt the contract of the electric charge system according to the maximum electric power consumption, for example, the electric charge is determined by the maximum electric power consumption of 30 minutes which becomes the maximum in one day. Therefore, the larger the maximum power consumption, the higher the electricity charge. Therefore, reducing the maximum power consumption is important in reducing the electricity charge.

  When the electric power company and the user adopt the contract of the electricity rate system in the time zone, for example, the electricity rate in the night time zone (23:00 to 7:00 on the next day) is the daytime time zone (7: It is set cheaper than the electricity charge of 00-23: 00). Therefore, the electricity charge can be reduced by charging the secondary battery from the system power supply at night and using the electric power stored in the secondary battery during the day.

  According to such a usage mode of the power storage system, the user can reduce the maximum power consumption, and the electric power company can level the power usage. Such a usage mode of the power storage system is called a countermeasure against peak cut.

  This power storage system includes a secondary battery that supplies power to a load, a bidirectional inverter that converts DC power of the secondary battery into AC power, or AC power from a system power supply into DC power, a solar battery, A solar cell DC / AC inverter that converts the DC power of the solar cell into AC power. The solar cell DC / AC inverter, the system power supply, the bidirectional inverter, and the load are each connected by an AC wiring. The bidirectional inverter and the secondary battery are connected by DC wiring.

  For example, the capacity of a secondary battery that can be used in this power storage system is 20 kWh, and a lithium ion battery that can obtain high capacity and high output is mainly used. In general, it is known that a lithium-ion battery deteriorates in performance and shortens its life when it continues to be in an overcharged state where it is charged to the limit of the allowable range of charge capacity or an overdischarged state where it is discharged to the limit of the allowable range. Yes. Therefore, the remaining amount of the lithium ion battery must be controlled within these allowable ranges.

  In addition to the above-described peak cut countermeasures, this power storage system uses power stored in the secondary battery as a backup power source for operating a load (for example, a light, an elevator, a computer server, etc.) when the system power supply fails. It is done. The load can be a specific load set in advance so that power can be preferentially received from the secondary battery at the time of a power failure of the system power supply. Further, a load other than the specific load can be set as a general load.

  FIG. 1 is a diagram showing a screen of a display device in one state according to the first embodiment of the present invention. The display device 1 of FIG. 1 displays a screen schematically showing secondary batteries, solar cells, power converters, system power supplies, loads, AC wirings, and DC wirings that are components of the power storage system.

  The display device 1 shown in FIG. 1 includes a system power source display unit 5, a load display unit 6, a solar cell display unit 3 for displaying solar cells, and a direct current of the secondary battery in addition to the remaining amount display unit 2 of the secondary battery. A power converter display unit 4 indicating a bidirectional inverter that converts an AC current from a system power source into a DC current, and a DC wiring display unit 8 that indicates a DC wiring connecting the power converter and the secondary battery; An AC wiring display unit 7 indicating AC wiring for connecting the power converter, the system power supply, the solar cell inverter, and the load is displayed, and these states are displayed on the display device 1.

  The remaining amount display section 2 of the display device 1 shown in FIG. 1 is shown in a general shape of a cylindrical battery, and a scale 21 indicating the capacity of the secondary battery in 10 stages is provided therein. That is, one of the scales 21 indicating the battery capacity corresponds to 10% of the battery capacity. In the remaining amount display portion, ten scales 21 are stacked. In the embodiment, the remaining amount display unit 2 is composed of 10 scales 21, but the number of scales is not limited to this form and can be changed as appropriate. The ratio to the battery capacity is also changed.

  Further, the remaining capacity scale 22 shown in gray indicates the capacity of the secondary battery used as a daily peak cut countermeasure as the chargeable / dischargeable capacity. In addition, the minimum reserved capacity shown in dark gray is the capacity of the secondary battery to be secured at the normal time for the purpose of supplying power to the load side in the event of an emergency when the supply from the system power supply 5 is stopped. is there. The total of the scale 21 including the gray remaining capacity scale 22 and the dark gray minimum secured capacity scale 23 shown in FIG. 1 is the total remaining battery capacity.

A solar cell display unit is displayed that indicates a state in which the solar cell is connected to the power storage system or a state in which the solar cell is not connected to the power storage system. The solar cell display unit in FIG. 1 displays the connected solar cell display unit 3. When the connected solar cell display unit 3 is displayed, the solar cell is connected to the power storage system, and the output of the solar cell is effectively output to the AC wiring. Since two solar cell display units are provided,
The display device 1 can display the states of the two solar cells. The solar cell display part is shown by the general shape of the solar cell which makes an external shape a parallelogram.

  FIG. 2 is a diagram showing a screen of the display device in another state according to the first embodiment of the present invention. In the display device 1 of FIG. 2, two unconnected solar cell display units 31 are displayed. The state when the unconnected solar cell display unit 31 is displayed indicates a state in which the solar cell is not connected to the livestock power system. In the display device 1 shown in FIG. 2, since two unconnected solar cell display units 31 are displayed, the two solar cells are not connected. The solar cell display unit 31 in an unconnected state is displayed as “unconnected” on the outline of the solar cell whose outer shape is a parallelogram. Whether or not a solar cell is connected is determined based on an output from the solar cell by a control unit provided in a power converter or a power storage system to which the solar cell is connected. The connection state of the solar cell is notified from the power converter or the control unit to the display device, and the result is reflected in the solar cell display unit.

  In the display device 1 and the power storage system using the display device 1 according to the present embodiment, the remaining amount display unit 2 of the secondary battery and the solar battery display that displays whether or not the solar battery is connected to the power storage system. Therefore, it is not necessary to change to a screen for confirming the connection state of the solar cell separately, and the user can recognize the configuration of the power storage system at a glance. In addition, the unconnected solar cell display unit 31 when the solar cell is not connected to the power storage system is different from the solar cell display unit when the solar cell is connected to the power storage system. Since the color or shape is displayed, the user can easily confirm the connection state of the solar cell.

  FIG. 3 is a diagram showing a screen of the display device according to the second embodiment of the present invention. The secondary battery display unit 24 in the warning state is displayed when the state of the secondary battery detects an abnormality. Whether or not the state of the secondary battery is abnormal is determined by the secondary battery control unit detecting the voltage, current, temperature, etc. of the secondary battery.

  The solar cell display unit 32 in a warning state is displayed when a solar cell fails. Whether or not the solar cell has failed is determined based on an output from the solar cell by a control unit provided in a power converter or the like to which the solar cell is connected.

  The warning state power converter display unit 41 is displayed when the power converter has failed. Whether or not the power converter has failed is determined based on the output of the power converter by the control unit of the power storage system.

  The warning system power supply display unit 51 is displayed when the system power supply fails. The power converter connected to the system power supply determines whether or not the system power supply has failed based on the output of the system power supply.

  The warning load display unit 61 is displayed when the breaker of the AC wiring that supplies power to the load is turned off. That is, the power supply to the load is stopped. When the breaker of the AC wiring is turned off, an OFF signal is notified to the control unit of the power storage system, and the warning load display unit 61 is displayed.

The warning state secondary battery display unit 24, the warning state solar cell display unit 32, the warning state power converter display unit 41, the warning state system power supply display unit 51, and the warning state load display unit 61 are all inclusive. Some of them may be displayed. When there is no abnormality or failure, the secondary battery display unit 24 in the warning state, the solar cell display unit 32 in the warning state, the power converter display unit 41 in the warning state, the system power display unit 51 in the warning state, the warning Instead of the load display unit 61 in the state, the battery display unit 3 in the normal state, the power converter display unit 4 in the normal state, the system power supply display unit 5 in the normal state, and the load display unit 6 in the normal state are displayed.

  The secondary battery display unit 24 in the warning state, the solar cell display unit 32 in the warning state, the power converter display unit 41 in the warning state, the system power supply display unit 51 in the warning state, and the load display unit 61 in the warning state illustrated in FIG. The color of the components of the power storage system shown in FIG. 1 is reversed as compared with the display state in a normal state. The present invention is not limited to such a form, and the user can be notified of an abnormality by blinking or changing the shape of each display.

  A message display unit 9 is provided at the bottom of each display device 1 shown in FIGS. 1, 2, and 3. The message display unit 9 displays state notifications, alert notifications, warning notifications, and the like in each function of the power storage system. In particular, when a message requiring attention is posted, the message is displayed as a warning message display unit 91 on the display device. The warning message display unit 91 can call the user's attention by changing the color combination of the background color and the message text or enlarging the message as compared with the normal message display unit 9.

DESCRIPTION OF SYMBOLS 1 ... Display apparatus 2 ... Remaining capacity display part 21 ... Scale 22 ... Remaining capacity scale 23 ... Minimum secured capacity scale 24 ... Warning secondary battery display part 3 ... Connected state solar cell display part 31 ... Unconnected state sun Battery display unit 32 ... Warning state solar cell display unit 4 ... Normal state power converter display unit 41 ... Warning state power converter display unit 5 ... Normal state system power source display unit 51 ... Warning state system power source display unit 6 ... Load display section in normal state 61 ... Load display section in warning state 7 ... AC wiring display section 8 ... DC wiring display section 9 ... Message display section 91 ... Warning message display section

Claims (7)

In the solar cell display unit that displays whether or not the solar cell is connected to the power storage system,
The solar cell display unit when the solar cell is not connected to the power storage system is displayed in a color or shape different from the solar cell display unit when the solar cell is connected to the power storage system. Display device. A remaining amount display portion for displaying a state of the remaining amount of the secondary battery;
The display device according to claim 1, wherein the remaining amount display unit and the solar cell display unit are displayed on the same screen.   At least a power converter display unit that displays a state of a power converter connected to a secondary battery, a system power source display unit that displays a state of a system power source, or a load display unit that displays a state of a load connected to a power storage system The display device according to claim 1, comprising any one of them.   4. The display device according to claim 1, wherein when an abnormality is detected in a configuration corresponding to each display unit of the display device, the display device is displayed in a color or shape different from that of the display unit when no abnormality is detected. . A secondary battery,
In a power storage system comprising a display device that displays a state of the secondary battery,
A remaining amount display unit for displaying a remaining amount of the secondary battery;
A solar cell display unit that displays whether or not the solar cell is connected to the power storage system,
The solar cell display unit when the solar cell is not connected to the power storage system is displayed in a color or shape different from the solar cell display unit when the solar cell is connected to the power storage system. Power storage system. At least a power converter display unit that displays a state of a power converter connected to a secondary battery, a system power source display unit that displays a state of a system power source, or a load display unit that displays a state of a load connected to a power storage system With one of them
6. The power storage system according to claim 5, wherein when an abnormality is detected in a configuration corresponding to each display unit of the display device, the power storage system is displayed in a color or shape different from that of the display unit when no abnormality is detected. In the solar cell display unit that displays whether or not the solar cell is connected to the power storage system,
The solar cell display unit when the solar cell is not connected to the power storage system is displayed in a color or shape different from the solar cell display unit when the solar cell is connected to the power storage system. Display method.

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