JP5842087B2 - Power distribution system, management device and terminal - Google Patents

Description

The present invention relates to a power distribution system that enables power to be supplied from a storage battery to an electrical device in a dwelling unit, a management device used in the power distribution system , and a terminal .

  Conventionally, a distribution system for supplying electric power from a commercial power source of an electric power company to an electric device in a dwelling unit has been constructed. When electric power is supplied from a commercial power source to an electric device, the upper limit value of electric power that can be used in a dwelling unit is determined by a contract with an electric power company and the capacity of a breaker installed in a distribution board. When power exceeding the upper limit is used, a situation occurs in which the breaker operates and power supply stops. If the above situation occurs, the lighting fixtures that are lit should be turned off, the operating air conditioner may be stopped, or the electric cooking utensils such as microwave ovens may be stopped. As a result, there is a problem in that it takes time to restore the electrical equipment.

  As a means to solve the above problem, a sensor is provided in the power supply unit, and when the detected amount of the sensor exceeds a predetermined supply amount, control is performed so as to reduce or stop the use of power to the pre-registered electric device. A system is known (see, for example, Patent Documents 1 and 2).

JP 2005-110424 A JP 2010-74591 A

  In conventional systems such as those described in Patent Literatures 1 and 2, a storage battery capable of storing electric power generated by solar power generation or the like is assumed to be supplied to an electric device only from a commercial power source. The case of supplying power is not taken into consideration. The storage capacity of a storage battery installed in a dwelling unit is generally not high. Therefore, when power is supplied to an electrical device from a storage battery having a limited storage capacity, there is a possibility that the storage battery will be used excessively without being noticed by the user. When the remaining amount of the storage battery decreases and the entire amount is discharged, it is necessary to use a commercial power source with a high power cost, and thus there is a problem that the energy cost cannot be suppressed.

The present invention has been made in view of the above points, and an object of the present invention is to inform the user that the remaining capacity of the storage battery and that the storage battery is used when the storage battery supplies power to the electrical equipment in the dwelling unit. It is to provide a power distribution system that can be used, and a management device and a terminal used in the power distribution system .

The power distribution system of the present invention is a power distribution system that enables electric power to be supplied to an electrical device installed in the dwelling unit from a storage battery and another power source different from the storage battery in the dwelling unit. A power supply detection that includes a management device that manages a remaining amount and a terminal that is installed in the dwelling unit and communicates with the management device, wherein the management device detects that the storage battery supplies power to the electrical device A remaining amount detection unit that detects the remaining amount of the storage battery, and the remaining power detection unit when the power supply detection unit detects that the storage battery supplies power to the electrical device. A management-side communication unit that transmits the remaining amount information relating to the detected remaining amount of the storage battery to the terminal, wherein the terminal acquires the remaining amount information from the management device; and the terminal Acquired by the side communication department Presenting the remaining amount of the storage battery according to the remaining amount information, and when the storage battery detects that the storage battery is supplying power to the electric device, A function control operation unit operated to switch between valid and invalid for the function of presenting the remaining amount, and a remaining amount confirmation operation unit operated to cause the presenting unit to present the remaining amount of the storage battery , The presenting unit switches between valid and invalid for the function of presenting the remaining amount of the storage battery when it is detected that the storage battery supplies power to the electrical device according to the switching operation on the function control operation unit. The presenting unit presents the remaining amount of the storage battery when the remaining amount confirmation operation unit is operated .

The management device according to the present invention is a management device used in the power distribution system, and includes the power supply detection unit, the remaining amount detection unit, and the management-side communication unit.

The terminal of this invention is a terminal used for the said power distribution system, Comprising: The said terminal side communication part and the said presentation part are provided, It is characterized by the above-mentioned.

  Unlike the case where the remaining amount of the storage battery is always presented by presenting the remaining amount of the storage battery by presenting the remaining amount of the storage battery when the storage battery is supplying power to the electrical device in the dwelling unit, the present invention Along with the remaining amount, it can be notified that the storage battery is currently being used.

1 is a schematic diagram illustrating a configuration of a wiring system according to a first embodiment. It is a block diagram which shows the structure of the management apparatus which concerns on the same as the above. It is a block diagram which shows the structure of the terminal which concerns on the same as the above. It is a front view of the terminal which concerns on the same as the above. It is a terminal which concerns on the same as the above, Comprising: It is a front view of the state attached to the attachment frame. (A) is a partial external view of the terminal according to the above, and (b) is a perspective view of a mounting frame to which the terminal according to the above is attached. It is a block diagram which shows the structure of the terminal which concerns on Embodiment 2. FIG. It is a front view of the terminal which concerns on the same as the above.

  In the following first to third embodiments, a power distribution system capable of supplying electric power from a storage battery to an electric device in a dwelling unit will be described.

(Embodiment 1)
As shown in FIG. 1, the power distribution system according to the first embodiment is installed in a dwelling unit 9 that is a detached house, and supplies power from a commercial power supply 7 to a plurality (two in the illustrated example) of electrical devices 6 and 6. Is possible. The electric device 6 is installed in a room 91 in the dwelling unit 9.

  The power distribution system of this embodiment includes a solar cell module 1 that performs grid connection, a power storage device 2 that stores DC power generated by the solar cell module 1, and a power conditioner that converts DC power into AC power. 31 and a distribution board 32 for distributing AC power. The power distribution system according to the present embodiment enables the dwelling unit 9 to supply power to each electrical device 6 from a plurality of power sources (solar cell module 1, commercial power source 7, and storage battery 21 described later). In addition, the installation place of a power distribution system is not limited to a detached house as shown in FIG. 1, One dwelling unit in an apartment house may be sufficient. When the power distribution system is installed in one dwelling unit in the apartment house, each of the solar cell module 1, the power storage device 2, and the power conditioner 31 is installed in the entire apartment house.

  In addition, the power distribution system of the present embodiment includes a management device 4 that manages the remaining amount of a storage battery 21 described later, and a plurality (two in the illustrated example) of terminals 5 and 5 that are installed in the dwelling unit 9 and communicate with the management device 4. And. The terminal 5 can be arranged at an arbitrary place in the dwelling unit 9 and is installed in a room 91 in which the electric device 6 is installed in the present embodiment.

  The solar cell module 1 is installed on the roof 92 of the dwelling unit 9 in a state where a plurality of solar cells are connected side by side, and generates DC power by solar power generation.

  The power storage device 2 includes a storage battery 21 that can store DC power generated by the solar cell module 1, and has a charge / discharge control function that controls charging / discharging of the storage battery 21. The storage battery 21 is, for example, a nickel-cadmium battery, a nickel metal hydride battery, a lithium ion battery, or a lead storage battery, and is provided in the dwelling unit 9. The power storage device 2 supplies power from the storage battery 21 to the electrical device 6 by discharging the storage battery 21 when power supply by the solar cell module 1 is insufficient (including the case of nighttime).

  The power conditioner 31 converts the DC power generated by the solar cell module 1 and the DC power output from the storage battery 21 into AC power.

  The distribution board 32 divides the AC power output from the power conditioner 31 and the AC power supplied from the commercial power supply 7.

  As shown in FIG. 2, the management device 4 includes a power supply detection unit 41 that detects that the storage battery 21 supplies power to the electrical device 6, and a remaining amount detection unit 42 that detects the remaining amount of the storage battery 21. And a management-side communication unit 43 that communicates with each terminal 5 (see FIG. 1). The management device 4 includes a CPU (Central Processing Unit) as a main component. Furthermore, the management device 4 includes a management-side power supply unit 44 that is an operation power supply for the management device 4.

  The power supply detection unit 41 detects from the power storage device 2 that the storage battery 21 is outputting DC power toward the power conditioner 31. That is, the power supply detection unit 41 detects from the power storage device 2 that the storage battery 21 is discharged. As a result, the power supply detection unit 41 detects that the storage battery 21 supplies power to at least one of the plurality of electric devices 6 and 6.

  The remaining amount detection unit 42 detects the remaining amount of the storage battery 21 by, for example, measuring the output voltage of the storage battery 21. The remaining amount information regarding the remaining amount of the storage battery 21 detected by the remaining amount detecting unit 42 is output from the remaining amount detecting unit 42 to the management side communication unit 43.

  When the power supply detection unit 41 detects that the storage battery 21 supplies power to at least one of the electrical devices 6, the management-side communication unit 43 uses the remaining amount information acquired from the remaining amount detection unit 42. Transmit to terminal 5. In the present embodiment, the management-side communication unit 43 transmits a communication signal including remaining amount information to the terminal 5 by wired communication. Specifically, the management-side communication unit 43 transmits a communication signal including the remaining amount information to the terminal 5 by power line communication (PLC) using the power line 8 as a communication line. That is, the management-side communication unit 43 is connected to the power line 8 (see FIG. 1) between the management device 4 and the distribution board 32, and transmits the communication signal to the terminal 5 by superimposing the communication signal on the power line 8. In addition, the management-side communication unit 43 receives the communication signal transmitted from the terminal 5 from the distribution board 32 in a state where the communication signal is superimposed on the supply power, and separates the communication signal into the supply power, thereby separating the communication signal. Can be acquired.

  The management-side power supply unit 44 serves as an operation power supply for the management device 4 by supplying power from the distribution board 32.

  As illustrated in FIG. 3, the terminal 5 includes a terminal-side communication unit 51 that communicates with the management device 4 (see FIG. 1), and a display unit 52 that presents the remaining amount of the storage battery 21. Furthermore, the terminal 5 includes a control unit 53 that controls the operation of the terminal 5 and a terminal-side power supply unit 54 that is an operation power source of the terminal 5. Further, as shown in FIG. 4, the terminal 5 includes a case 55 in which a terminal-side communication unit 51, a display unit 52, a control unit 53, and a terminal-side power supply unit 54 are accommodated.

  A terminal-side communication unit 51 illustrated in FIG. 3 is connected to the power line 8 (see FIG. 1) between the distribution board 32 and the terminal 5, and acquires remaining amount information from the management device 4 by power line carrier communication. That is, the terminal-side communication unit 51 receives the communication signal transmitted from the management device 4 in a state of being superimposed on the supply power, and is separated into the communication signal and the supply power, thereby being included in the communication signal. Get remaining capacity information. The remaining amount information acquired by the terminal side communication unit 51 is output from the terminal side communication unit 51 to the display unit 52 in accordance with an instruction from the control unit 53. Further, the terminal side communication unit 51 can superimpose a communication signal on the power line 8 and transmit it to the terminal 5.

  As shown in FIG. 4, the display unit 52 includes a plurality (five in the illustrated example) of light emitting units 521 to 525 that emit light of different colors. The light emitting units 521 to 525 are exposed on the front surface of the case 55. In this embodiment, the light emitting unit 521 is lit blue, the light emitting unit 522 is lit green, the light emitting unit 523 is lit yellow, the light emitting unit 524 is lit orange, and the light emitting unit 525 is lit red. .

  The display unit 52 configured as described above changes the lighting state of the plurality of light emitting units 521 to 525 in accordance with the remaining amount information acquired by the terminal-side communication unit 51 in accordance with an instruction from the control unit 53, thereby storing the storage battery. The remaining amount of 21 (see FIG. 1) is presented. The display unit 52 has a function of a presentation unit. That is, the display unit 52 displays the remaining amount of the storage battery 21 by turning on light of different colors according to the remaining amount information. For example, when the remaining amount of the storage battery 21 is 100%, the light emitting unit 521 is turned on, when the remaining amount of the storage battery 21 is 80%, the light emitting unit 522 is turned on, and the remaining amount of the storage battery 21 is 50%. The light emitting unit 523 is turned on. When the remaining amount of the storage battery 21 is 30%, the light emitting unit 524 is turned on, and when the remaining amount of the storage battery 21 is 10%, the light emitting unit 525 is turned on.

  In addition, the display part 52 is not limited to the said lighting method, The remaining amount of the storage battery 21 is displayed by displaying in multiple colors using one light emission part, or changing the blinking interval by one color. May be presented. When changing the blinking interval, for example, the blinking interval is set to 10 seconds when the remaining amount of the storage battery 21 is 100%, and is set to 5 seconds when the remaining amount of the storage battery 21 is 80%. When the remaining amount is 50%, it is set to 2 seconds. It is set to 1 second when the remaining amount of the storage battery 21 is 30%, and is set to 0.5 second when the remaining amount of the storage battery 21 is 10%.

  The control unit 53 includes a CPU as a main component, and controls, for example, operations of the terminal-side communication unit 51 and the display unit 52, and controls information exchange between the terminal-side communication unit 51 and the display unit 52. . For example, when the function of presenting the remaining amount of the storage battery 21 is valid, the control unit 53 controls the display unit 52 so that the display unit 52 displays the remaining amount of the storage battery 21 at a preset time interval.

  The terminal-side power supply unit 54 becomes an operation power supply for the terminal 5 by supplying power from the distribution board 32.

  As shown in FIG. 5, the case 55 is attached to an attachment frame 561 that is formed so that a plurality of unit-sized wiring devices (not shown) can be attached. The wiring device is a large-angle continuous wiring device that is standardized by the JIS standard. As shown in FIG. 6B, the attachment frame 561 is formed with a rectangular frame-shaped and elongated window hole 563 for attaching an instrument. The window hole 563 is formed to have a dimension that allows three wiring devices having a unit dimension in the longitudinal direction to be mounted side by side. Three sets of two device mounting holes 565 for mounting a wiring device are formed on both side frame pieces 564 and 564 along the longitudinal direction of the mounting frame 561. The attachment frame 561 is attached to a construction surface such as a wall surface in the dwelling unit 9, and the rear portion of the case 55 is embedded in the construction surface. On the front side of the mounting frame 561, as shown in FIG.

  The case 55 is formed in the dimension prescribed | regulated by the standard specification of the wall switch. That is, in the direction along the longitudinal direction of the window hole 563, the dimension of the case 55 is set to a dimension in which three wiring devices having unit dimensions are arranged. In the direction along the short direction of the window hole 563, the dimension of the case 55 is substantially equal to the dimension of the window hole 563 in the short direction. The dimension of the case 55 is not limited to the above, and may be a dimension in which one or two wiring devices having unit dimensions are arranged in the direction along the longitudinal direction of the window hole 563. Further, the case 55 may be of a size that can be attached to a double attachment frame (not shown) instead of the single attachment frame 561.

  As shown in FIG. 6, a pair of mounting claws 551 that can be engaged with the instrument mounting holes 565 formed in the mounting frame 561 are provided on both side surfaces of the case 55 so as to protrude. The case 55 is held by the mounting frame 561 by engaging the mounting claw 551 with the instrument mounting hole 565. On one side wall of the case 55, two cut grooves 552 and 552 having rear ends open are formed along the front-rear direction on both the upper and lower sides of the portion where the mounting claw 551 is provided. A bending piece 553 having flexibility in the thickness direction is formed at a portion between the two cut grooves 552 and 552. That is, by bending the bending piece 553 to the inside of the case 55, the pair of attachment claws 551, 551 can be elastically retracted from the side surface of the case 55.

  By the way, the terminal 5 is provided with the residual amount confirmation operation part 57 operated in order to display the residual amount of the storage battery 21 (refer FIG. 1) on the display part 52, as shown in FIG. In the present embodiment, a push button switch is used as the remaining amount confirmation operation unit 57. The remaining amount confirmation operation unit 57 is exposed on the front surface of the case 55 so that the user can operate it (see FIG. 4).

  When the user presses the remaining amount confirmation operation unit 57, the control unit 53 controls the terminal side communication unit 51 to acquire the remaining amount information from the management device 4, and the display unit 52 stores the storage battery according to the remaining amount information. The display unit 52 is controlled to display the latest 21 remaining amount.

  The display unit 52 displays the remaining amount of the storage battery 21 in accordance with an instruction from the control unit 53 when the remaining amount confirmation operation unit 57 is operated.

  When the remaining amount confirmation operation unit 57 is operated as described above, the remaining amount of the storage battery 21 at the time when the remaining amount confirmation operation unit 57 is operated, whether the storage battery 21 is being discharged or being charged. The remaining amount information indicating the amount is transmitted from the management device 4 to the terminal 5. At this time, the remaining amount of the storage battery 21 displayed on the display unit 52 indicates a capacity that can be discharged (dischargeable capacity) when the storage battery 21 is discharging, and is already charged when the storage battery 21 is charging. Capacity (charged capacity).

  Furthermore, the terminal 5 includes a function control operation unit 58 that is operated to switch between valid and invalid for the function of presenting the remaining amount of the storage battery 21 by the display unit 52. In the present embodiment, a slide switch is used as the function control operation unit 58. The function control operation unit 58 has an operation knob 581 exposed on the front surface of the case 55 so that the user can operate it (see FIG. 4).

  The control unit 53 switches between enabling and disabling the function of presenting the remaining amount of the storage battery 21 by the display unit 52 according to the switching operation by the user in the function control operation unit 58. Specifically, when the function of presenting the remaining amount of the storage battery 21 is effectively switched by the function control operation unit 58, the control unit 53 enables the function of presenting the remaining amount of the storage battery 21 by the display unit 52. Let When the function for presenting the remaining amount of the storage battery 21 is invalidally switched by the function control operation unit 58, the control unit 53 stops the function of presenting the remaining amount of the storage battery 21 by the display unit 52.

  The display unit 52 switches between enabling and disabling the function of presenting the remaining amount of the storage battery 21 in accordance with an instruction from the control unit 53.

  Next, operation | movement of the power distribution system which concerns on this embodiment is demonstrated using FIGS. First, in the management device 4, when the power supply detection unit 41 detects that the storage battery 21 is supplying power to the electrical device 6, the remaining amount detection unit 42 detects the remaining amount of the storage battery 21. Thereafter, the management-side communication unit 43 transmits the remaining amount information to the terminal 5. In the terminal 5, the terminal side communication unit 51 acquires the remaining amount information from the management device 4, and the display unit 52 displays the remaining amount of the storage battery 21 according to the remaining amount information.

  From the above description, in the power distribution system according to the present embodiment, the display unit 52 of the terminal 5 is connected to the storage battery 21 when the storage battery 21 supplies power to the electrical device 6 in the dwelling unit 9 capable of supplying power from the storage battery 21. Present the remaining amount. Thereby, in the power distribution system of this embodiment, since the remaining amount of the storage battery 21 can be notified to the user, for example, excessive use of the storage battery 21 by the user can be suppressed.

  In addition, as described above, the power distribution system of the present embodiment presents the remaining amount of the storage battery 21 when the storage battery 21 supplies power to the electrical device 6. Thereby, unlike the case where the remaining amount of the storage battery 21 is always presented, the power distribution system of the present embodiment notifies the user that the storage battery 21 is currently used together with the remaining amount of the storage battery 21. be able to. As a result, it is possible to change the usage method and use time of the electric device 6 for the user, and to support the awareness of energy saving.

  Furthermore, since the power distribution system of this embodiment presents the remaining amount of the storage battery 21 when the storage battery 21 supplies power to the electrical device 6, it is managed compared to the case where the remaining amount of the storage battery 21 is always presented. Communication traffic due to communication between the device 4 and the terminal 5 can be reduced.

  In the power distribution system of the present embodiment, the user can check the remaining amount of the storage battery 21 at any timing by operating the remaining amount confirmation operation unit 57, and whether or not the electric device 6 may be used. Can be judged.

  Moreover, the power distribution system of this embodiment can switch whether the function which presents the remaining amount of the storage battery 21 is validated or invalidated by the user switching the function control operation unit 58. Thereby, for example, when the user does not need to present the remaining amount at bedtime, the user can prevent unnecessary presentation of the remaining amount by switching the function control operation unit 58 so as to invalidate the above function. .

  Furthermore, the power distribution system according to the present embodiment visually indicates the remaining amount of the storage battery 21 by causing the plurality of light emitting units 521 to 525 to emit light according to the remaining amount information and presenting the remaining amount of the storage battery 21. Can be confirmed.

  Further, in the power distribution system of the present embodiment, the shape of the case 55 of the terminal 5 is such that the terminal 5 can be attached to the attachment frame 561 for the wiring device. Thereby, according to the power distribution system of this embodiment, when installing the terminal 5 in the room 91, the member for installing the wiring device can be used, and the terminal 5 can be used by the same construction method as the case of installing the wiring device. Can be installed in the room 91.

(Embodiment 2)
The power distribution system according to the embodiment is different from the power distribution system according to the first embodiment in that the terminal 5 includes an alarm sound output unit 59 as shown in FIG. 7 instead of the display unit 52 as a presentation unit. In addition, about the component similar to the power distribution system of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As illustrated in FIG. 7, the terminal 5 of the present embodiment includes an alarm sound output unit 59 that presents the remaining amount of the storage battery 21 according to the remaining amount information acquired by the terminal-side communication unit 51. Note that the terminal 5 of the present embodiment includes a terminal-side communication unit 51, a control unit 53, a terminal-side power supply unit 54, and a remaining amount confirmation operation unit 57 in the same manner as the terminal 5 of the first embodiment.

  The alarm sound output unit 59 includes a sound source (not shown) such as a speaker, for example, and presents the remaining amount of the storage battery 21 (see FIG. 1) by changing the state of the sound output from the sound source. The alarm sound output unit 59 has a function of a presentation unit. The alarm sound output unit 59 is housed in the case 55 so that sound is output from the front surface of the case 55 to the outside (see FIG. 8).

  The alarm sound output unit 59 configured as described above outputs an alarm sound “beep” when the remaining capacity of the storage battery 21 is 100%, and “beep” when the remaining capacity of the storage battery 21 is 80%. Is output. The alarm sound output unit 59 outputs an alarm sound “beep” when the remaining amount of the storage battery 21 is 50%, and outputs an alarm sound “beep” when the remaining amount of the storage battery 21 is 30%. When the remaining amount of the storage battery 21 is 10%, an alarm sound “Peep” is output.

  The function control operation unit 58 of the present embodiment is operated to switch between valid and invalid for the function of presenting the remaining amount of the storage battery 21 by the alarm sound output unit 59. In addition, description is abbreviate | omitted about the function similar to the function control operation part 58 (refer FIG.3, 4) of Embodiment 1. FIG.

  The control unit 53 of the present embodiment switches whether to enable or disable the function of presenting the remaining amount of the storage battery 21 by the alarm sound output unit 59 according to the switching operation by the user at the function control operation unit 58.

  The alarm sound output unit 59 switches between enabling and disabling the function of presenting the remaining amount of the storage battery 21 in accordance with an instruction from the control unit 53.

  As described above, according to the power distribution system of the present embodiment, since the remaining amount of the storage battery 21 can be presented by changing the sound state of the alarm sound output unit 59, visual confirmation is unnecessary. Thereby, even if it is a case where a user operates the electric equipment 6 in the place where it is difficult to visually recognize the terminal 5, use of the electric equipment 6 which suppressed electric power cost can be supported with respect to a user.

(Embodiment 3)
The power distribution system according to the third embodiment is different from the power distribution system according to the first embodiment in that the management device 4 and the terminal 5 perform wireless communication instead of wired communication. In addition, description is abbreviate | omitted about the component similar to the power distribution system of Embodiment 1. FIG.

  The management-side communication unit 43 of the present embodiment transmits remaining amount information to the terminal 5 by wireless communication such as a wireless LAN (Local Area Network). Note that a description of the same functions as those of the management-side communication unit 43 of the first embodiment will be omitted.

  Note that the function of wireless communication between the management device 4 and the terminal 5 in the present embodiment may be applied to the power distribution system in the second embodiment.

DESCRIPTION OF SYMBOLS 21 Storage battery 4 Management apparatus 41 Power supply detection part 42 Remaining amount detection part 43 Management side communication part 5 Terminal 51 Terminal side communication part 52 Display part (presentation part)
521 to 525 Light emitting unit 55 Case 57 Remaining amount confirmation operation unit 58 Function control operation unit 59 Alarm sound output unit (presentation unit)
6 Electrical equipment 9 Dwelling units

Claims (3)

In the dwelling unit, a power distribution system that enables power to be supplied to the electrical equipment installed in the dwelling unit from the storage battery and another power source different from the storage battery,
A management device that manages the remaining amount of the storage battery, and a terminal that is installed in the dwelling unit and communicates with the management device,
The management device
A power supply detection unit that detects that the storage battery is supplying power to the electrical device;
A remaining amount detection unit for detecting the remaining amount of the storage battery;
When the power supply detection unit detects that the storage battery is supplying power to the electric device, the remaining amount information related to the remaining amount of the storage battery detected by the remaining amount detection unit is transmitted to the terminal. A management side communication unit
The terminal
A terminal-side communication unit that acquires the remaining amount information from the management device;
A presentation unit that presents the remaining amount of the storage battery according to the remaining amount information acquired by the terminal-side communication unit;
A function control operation unit operated to switch between valid and invalid for the function of presenting the remaining amount of the storage battery by the presenting unit when it is detected that the storage battery is supplying power to the electrical device ; ,
A remaining amount confirmation operation unit operated to cause the presentation unit to present the remaining amount of the storage battery ,
The presenting unit determines whether the function of presenting the remaining amount of the storage battery is valid or invalid when it is detected that the storage battery supplies power to the electric device according to the switching operation on the function control operation unit. Switching ,
The presenting unit presents the remaining amount of the storage battery when the remaining amount confirmation operation unit is operated . A management device used in the power distribution system according to claim 1,
The power supply detection unit, the remaining amount detection unit, and the management-side communication unit.
A management device characterized by that. A terminal used in the power distribution system according to claim 1,
The terminal-side communication unit and the presentation unit are provided.
A terminal characterized by that.

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