Power outage prevention method, power outage prevention set, and portable battery switch device

Abstract

Anticipating future technological developments in portable storage batteries, we will provide low-cost, more advanced power outage prevention technology. [Solution] A first branch switch 81 of a distribution board 8 is connected to an input terminal 21 of a portable storage battery 2 via a first switch 11, and a first output terminal 231 of the portable storage battery 2 is connected to a first load 91 via the first switch 11. A second branch switch 82 and a second output terminal 232 of the portable storage battery 2 are connected to a second load 92 via a second switch 12. When there is no power outage, the portable storage battery 2 is charged with power from the first branch switch 81, and power from the branch switches 81, 82 is supplied to the loads 81, 82 via switches 11, 12. When there is a power outage, the first output terminal 231 of the portable storage battery 2 is connected to the first load 91 via the first switch 11 to supply power, and the second output terminal 232 is connected to the second load 92 via the second switch 12 to supply power.

Description

[Technical Field]

[0001] The present invention relates to a technique for taking measures against power outages that may occur due to large-scale disasters. [Background technology]

[0002] In recent years, there have been frequent cases of natural disasters such as major earthquakes and floods causing severe damage to local lifelines, making it an urgent issue to take thorough measures to deal with these. In particular, there have been an increasing number of cases of large-scale power outages caused by damage to power plants and power transmission and distribution networks, and the importance of taking measures to deal with these situations is being emphasized. When a power outage occurs due to a disaster, it is rare for it to take a long time to be restored, but in many cases it takes several days. During that time, people are forced to live an inconvenient life without electricity. Many people evacuate to evacuation shelters equipped with emergency power supply equipment, but many hesitate to do so for privacy reasons and end up staying in their homes without electricity. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-154257 [Patent Document 2] Patent No. 7686326 [Patent Document 3] Patent No. 7686325 [Patent Document 4] Patent No. 7637450 [Patent Document 5] Patent No. 7591330 Summary of the Invention [Problem to be solved by the invention]

[0004] In consideration of the above issues, measures are being taken to install emergency power supply equipment in ordinary homes to prepare for power outages during disasters. However, the installation must be done when a new home is built, and the cost is in the hundreds of thousands of yen. Emergency power supply equipment for ordinary homes typically includes solar panels and storage batteries. During normal times (when there is no power outage), the storage battery is charged with grid power (power supplied by the power company) and sunlight, and in the event of a disaster (power outage), the battery's power is used. In addition, so-called V2H (Vehicle to Home) systems are sometimes installed, and equipment is installed so that electric vehicles or plug-in hybrid vehicles can be used as storage batteries. In any case, these conventional emergency power supply measures are very costly and require long construction times, so the reality is that they have not become widely used.

[0005] The same applies to non-residential buildings, and it is desirable to have low-cost and easy power outage countermeasures. In consideration of these issues, the applicant of the present application has filed patent documents 2 to 5, which disclose power outage countermeasure technologies using portable storage batteries. The present invention is based on the technologies disclosed in the above Patent Documents 2 to 5, and aims to provide a low-cost, more extensive power outage prevention technology, anticipating future technological developments in portable storage batteries. [Means for solving the problem]

[0006] In order to solve the above problems, this specification discloses inventions for a power outage countermeasure method, a power outage countermeasure set, and a switch device for a portable storage battery. The power outage countermeasure method of the disclosed invention is a power outage countermeasure method that allows users who own a distribution board with multiple branch switches to take power outage countermeasures, and is a power outage countermeasure method that involves connecting a single portable storage battery to the distribution board via multiple switches. In this method, the portable battery has an input terminal and first and second output terminals. A first branch switch among the plurality of branch switches in the distribution board is a switch connected to a first load and supplies power from the system, and a second branch switch is a switch connected to a second load and supplies power from the system. And this power outage prevention method is: connecting a first branch switch to an input terminal of the portable battery and connecting the first branch switch to a first load via a first switch; A second branch switch is connected to a second load via a second switch. Furthermore, this power outage countermeasure method is a method in which, during a non-power outage, a portable storage battery is charged with power from a first branch switch, power from the first branch switch is supplied to a first load via a first switch, and power from the second branch switch is supplied to a second load via a second switch, During a power outage, a first output terminal of a charged portable battery is connected to a first load via a first switch to supply power, and a second output terminal of the charged portable battery is connected to a second load via a second switch to supply power. In this power outage prevention method, the first switch is a switch that, when a first output terminal of the portable storage battery is connected to a first load during a power outage, disconnects the first output terminal from the first branch switch; The second switch is a switch that disconnects the second output terminal of the portable storage battery from the second branch switch when the second output terminal is connected to a second load during a power outage. In addition, the power outage prevention set according to the disclosed invention is a power outage prevention set that is attached to a distribution board having a plurality of branch switches, and includes a portable storage battery and a switch device. In this power outage prevention kit, a first branch switch among the plurality of branch switches in the distribution board is a switch connected to a first load and supplies power from the grid, and a second branch switch is a switch connected to a second load and supplies power from the grid, the switch device is a device interposed between the first and second branch switches and the first and second loads, and the portable battery is a battery attached to the switch device; The portable battery has an input terminal and first and second output terminals. In addition, this power outage prevention kit includes: a battery power supply wiring is provided that connects the first branch switch and an input terminal of the portable battery; The switch device includes a first switch and a second switch, the first switch is interposed between the first branch switch and the first load, and when there is no power outage, power is supplied to the portable battery via the battery power supply wiring so that the power is stored, and when there is a power outage, a first output terminal of the portable battery is connected to the first load to supply power, thereby setting the portable battery in a power outage power supply state, and in the power outage power supply state, the first output terminal is disconnected from the first branch switch; The second switch is interposed between the second branch switch and the second load, and is a switch that connects the second branch switch to the second load when there is no power outage, and connects the second output terminal of the portable storage battery to the second load when there is a power outage, thereby setting the power supply state during a power outage, and in the power supply state during a power outage, the second output terminal is disconnected from the second branch switch. Furthermore, this power outage prevention kit includes: When the portable storage battery is removed from the switch device, the connection state between the first branch switch and the first load and the connection state between the second branch switch and the second load are maintained. In addition, the portable storage battery switch device of the disclosed invention is a switch device that is used when attaching a portable storage battery having one input terminal and a plurality of first and second output terminals to a distribution board that has a first branch switch connected to a first load and supplying power from the system to the first load, and a second branch switch connected to a second load and supplying power from the system to the second load, and is interposed between the distribution board and the first and second loads. This switch device includes a battery power supply line that connects a first branch switch and an input terminal of a portable battery, a first switch, and a second switch. In this switch device, the first switch is interposed between the first branch switch and the first load, and when there is no power outage, power is supplied to the portable battery via the battery power supply wiring so that the power is stored, and when there is a power outage, a first output terminal of the portable battery is connected to the first load to supply power, thereby setting the portable battery in a power outage power supply state, and in the power outage power supply state, the first output terminal is disconnected from the first branch switch; The second switch is interposed between the second branch switch and the second load, and is a switch that connects the second branch switch to the second load when there is no power outage, and connects the second output terminal of the portable storage battery to the second load when there is a power outage, thereby setting the power supply state during a power outage, and in the power supply state during a power outage, the second output terminal is disconnected from the second branch switch. In this switch device, when the portable storage battery is removed, the connection state between the first branch switch and the first load and the connection state between the second branch switch and the second load are maintained. [Effects of the Invention]

[0007] As explained below, according to the power outage countermeasure methods, power outage countermeasure sets, and portable storage battery switch devices of the disclosed inventions, when a power outage occurs, two or more loads that are supplied with power from two or more branch switches are supplied with power from a single portable storage battery, thereby enabling more extensive power outage countermeasures to be implemented at low cost. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of a power outage prevention set according to a first embodiment. [Figure 2] 1. FIG. 4 is a schematic diagram showing a switch operation when removing the portable storage battery in the embodiment of FIG. [Figure 3] FIG. 4 is a schematic diagram illustrating a switch operation during a power outage in the first embodiment. [Figure 4] FIG. 10 is a schematic diagram of a power outage prevention set according to a second embodiment. [Figure 5] FIG. 10 is a schematic diagram illustrating switch operations during a power outage in the second embodiment. [Figure 6] FIG. 10 is a schematic diagram of a power outage prevention set according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following describes embodiments of the disclosed inventions. Figure 1 is a schematic diagram of a power outage prevention set according to a first embodiment. The power outage prevention set shown in Figure 1 is a set that implements a function to secure power supply using a storage battery in the event of a power outage. As shown in Figure 1, this power outage prevention set is composed of a switch device 1, a portable storage battery 2, a solar power generation panel 3, main wiring 41, 42, etc.

[0010] This power outage countermeasure kit is attached to a distribution board 8 that distributes and supplies power from the grid to each load. As is well known, distribution boards are connected to a grid power transmission and distribution network (hereinafter abbreviated as "grid") provided by an electric power company to receive power supply. However, in the following explanation, "grid" is not necessarily limited to the grid power transmission and distribution network provided by an electric power company. For example, if the user is an operator of a large-scale facility that has its own power plant (e.g., a renewable energy power plant), the grid may be the power transmission and distribution network from this power plant.

[0011] The power outage countermeasure set in the embodiment is attached to two or more branch switches in the distribution board 8. In the following example, the set is attached to two branch switches 81, 82, but three or more may be attached. Hereinafter, the branch switches 81, 82 to which the power outage countermeasure set is attached will be referred to as the first branch switch 81 and the second branch switch 82. Furthermore, the load 91 supplied with power from the first branch switch 81 will be referred to as the first load, and the load 92 supplied with power from the second branch switch 82 will be referred to as the second load. When the power outage countermeasure set is attached to the distribution board 8 in a typical home, for example, the first load 91 will be, for example, the living / dining room, and the second load 92 will be, for example, a bedroom.

[0012] The power outage countermeasure set of the embodiment is basically installed in a state where it is interposed between the distribution board 8 and each of the loads 91, 92. Therefore, when the power outage countermeasure set is installed later, the power feeder connected to the first load 91 at the first branch switch 81 is removed, and the power feeder connected to the second load 92 at the second branch switch 82 is removed, and then the power outage countermeasure set is installed.

[0013] The switch device 1 corresponds to an embodiment of the invention of a switch device for a portable storage battery. The switch device 1 includes a first switch 11 and a second switch 12. The switch device 1 has a switch box 15, and the first switch 11 and the second switch 12 are provided in the switch box 15. The switch box 15 is provided with an input terminal (hereinafter referred to as the first main input terminal) 101 for the first branch switch 81 and an input terminal (hereinafter referred to as the second main input terminal) 102 for the second branch switch 82. The power outage countermeasure set includes first and second main wiring 41, 42. The first main wiring 41 connects the first branch switch 81 and the first main input terminal 101, and the second main wiring 42 connects the second branch switch 82 and the second main input terminal 102.

[0014] The switch box 15 is also provided with a first load terminal 103 and a second load terminal 104. A first load side power feeder 43 that supplies power to a first load 91 is connected to the first load terminal 103, and a second load side power feeder 44 that supplies power to a second load 92 is connected to the second load terminal 104. When a power outage countermeasure set is installed later, the first and second load side power feeders 43, 44 are often existing power feeders that have been removed from the first and second branch switches 81, 82.

[0015] As shown in FIG. 1, in this embodiment, the switch box 15 of the switch device 1 is provided with one battery input terminal 51 and two battery output terminals (first and second) 521, 522 as terminals for the portable storage battery 2. On the other hand, in this embodiment, the portable storage battery 2 has an AC input terminal 21, a DC input terminal 22, and first and second output terminals 231, 232. The AC input terminal 21 is an input terminal for storing power from the grid, and is connected to the storage battery input terminal 51 by a power-side AC cable 24. The DC input terminal 22 is for connecting the solar power generation panel 3. In this embodiment, the solar power generation panel 3 is connected to the DC input terminal 22 by a DC cable 31.

[0016] The portable storage battery 2 is equipped with a power storage mode selection switch 20 that switches between storing power from the AC input terminal 21 (AC mode), power from the DC input terminal 23 (DC mode), or a hybrid (HB) mode in which power from both sources is used. In the hybrid mode in which power from both sources is used, priority is given to storing power from the DC input terminal 23 in order to achieve energy-saving effects. In the hybrid mode, when power from the solar power generation panel 3 runs out, for example at night, power is stored using AC power (grid power). Note that the solar power generation panel 3 may be equipped with an AC converter and connected to the portable storage battery 2 by an AC cable. In this case, the AC input terminal 21 is plugged in for connection, but the portable storage battery 2 may also be equipped with a separate AC input terminal that can be switched using a switch.

[0017] In this embodiment, the first and second output terminals 231, 232 are both terminals for outputting (discharging) at a rated AC voltage. The first output terminal 231 is connected to a first storage battery output terminal 521 via a first output AC cable 251, and the second output terminal 232 is connected to a second storage battery output terminal 522 via a second output AC cable 252. Such a portable storage battery 2 preferably has a large capacity (maximum power storage amount) of approximately 800 Wh to 15,000 Wh. For example, the Anker Solix C1000 manufactured by Anker Japan can be used as the portable storage battery 2 in this embodiment. The portable storage battery 2 has a reverse current prevention function that prevents reverse power flow from being output from the AC input terminal 21. Furthermore, the portable storage battery 2 also has a function that detects full charge and automatically stops charging to prevent overcharging.

[0018] The power outage prevention set of this embodiment is configured such that a portable storage battery 2 and a first switch 11 are interposed between a first branch switch 81 and a first load 91, and the portable storage battery 2 and the first load 91 are connected in series. Specifically, the first switch 11 has first and second selection terminals 111 and 112 and a common terminal 113. The first selection terminal 111 is connected to a first main input terminal 101. A storage battery input line 14 also extends from the first selection terminal 111, and the storage battery input line 14 is connected to a storage battery input terminal 51. Therefore, in the first embodiment, the first main wiring 41, the wiring connecting the first main input terminal 101 and the first switch 11, and the storage battery input line 14 connecting the first switch 11 and the storage battery input terminal 51 correspond to the storage battery power supply wiring.

[0019] As shown in FIG. 1, an additional switch 16 is provided on the storage battery input line 14. The additional switch 16 is a switch that can select whether the storage battery input line 14 is short-circuited or open-circuited. The additional switch 16 is provided as a safety device for the storage battery input terminal 103. The additional switch 16 also has an operating part such as a lever (not shown), and the operating part is exposed on the outer surface (for example, the front surface) of the switch box 15. By operating the operating part, the storage battery input line 14 can be switched between short-circuited and open-circuited.

[0020] A second selection terminal 112 of the first switch 11 is connected to a second storage battery output terminal 522 by a first storage battery output line (reference number omitted). A common terminal 113 of the first switch 11 is connected to a first load terminal 103 by a first load wiring (reference number omitted). A first load safety switch 18 is provided on the first load wiring. The first load safety switch 18 is an additional switch provided for safety purposes and is normally kept in an on (short-circuit) state. In the normal state, the first switch 11 is in a state in which the second selection terminal 112 is short-circuited to the common terminal 113. In this state, the AC input terminal 21 of the portable storage battery 2 is connected to the first branch switch 81 via the first main wiring 41, the first main input terminal 101, the first selection terminal 111, the storage battery input line 14, the storage battery input terminal 51, and the input AC cable 24. The first output terminal 231 of the portable storage battery 2 is connected to the first load 91 via the first output AC cable 251, the first storage battery output terminal 521, the first storage battery output line, the second selection terminal 112, the common terminal 113, the first load wiring, the first load terminal 103, and the first load power supply line 43. Therefore, the portable storage battery 2 is configured to be interposed in series between the first branch switch 81 and the first load 91.

[0021] The portable storage battery 2 has a pass-through function, and is capable of storing power from the first branch switch 81 while maintaining electrical continuity between the first branch switch 81 and the first load 91. The portable storage battery 2 also has a power outage detection function, and upon detecting a power outage, automatically generates an output voltage at each of the first and second output terminals (sets the battery in a dischargeable state). Detecting a power outage means detecting that the input voltage is zero even though the input side AC cable 24 is connected to the AC input terminal 21.

[0022] The first switch 11 is operated when the portable storage battery 2 is removed from the switch device 1. This will be described with reference to Fig. 2. Fig. 2 is a schematic diagram showing the switch operation when the portable storage battery 2 is removed in the embodiment of Fig. 1. As shown in Fig. 2, when the portable storage battery 2 is removed from the switch device 1, the first switch 11 is set to a state in which the second selection terminal 112 is disconnected from the common terminal 113 and the first selection terminal 111 is short-circuited to the common terminal 113. In this state, the first branch switch 81 is connected directly to the first load 91 without passing through the portable storage battery 2. Hereinafter, this state will be referred to as the disconnection state.

[0023] On the other hand, the second switch 12 is connected so as to be interposed between the second branch switch 82 and the second load 92. The second switch 12 also has first and second selection terminals 121 and 122 and a common terminal 123. As shown in FIG. 1 , the first selection terminal 121 of the second switch 12 is connected to the second main input terminal 102, and the common terminal 123 is connected to the second load terminal 104. The second selection terminal 122 of the second switch 12 is connected to the second storage battery output terminal 522. A second load safety switch 19 is provided on the wiring connecting the common terminal 213 of the second switch 12 and the second load terminal 104. The second load safety switch 19 is also an additional switch provided for safety purposes and is normally kept in the on (short-circuit) state.

[0024] In the normal state, the second switch 12 is in a state in which the first selection terminal 121 and the common terminal 123 are shorted. During a power outage, the second switch 12 is in a state in which the first selection terminal 121 is disconnected from the common terminal 123 and the second selection terminal 122 is shorted to the common terminal 123. That is, during a power outage, the second switch 12 is operated to disconnect the second load 92 from the second branch switch 82 and connect the second output terminal 232 of the portable storage battery 2. Hereinafter, the state in which the first selection terminal 121 and the common terminal 123 are shorted and the second selection terminal 122 is disconnected from the common terminal 123 will be referred to as the normal state of the second switch 12, and the state in which the first selection terminal 121 is disconnected from the common terminal 123 and the second selection terminal 122 is shorted to the common terminal 123 will be referred to as the power outage state. The first switch 11 and the second switch 12 are both manual switches equipped with levers. Each lever is exposed on the surface (for example, the front) of the switch box 15, making it easy to operate.

[0025] The operation of the power outage countermeasure set of the first embodiment will be described below with reference to Figures 1 to 3. Figure 3 is a schematic diagram showing switch operations during a power outage in the first embodiment. The following description also describes an embodiment of the power outage countermeasure method of the invention. The power outage countermeasure set of the embodiment is attached to the distribution board 8 that distributes and supplies power to each of the loads 91 and 92. This work is performed by a construction company (electrician). Note that the person who sells (or leases) the power outage countermeasure set to a user and installs the power outage countermeasure set to prepare for a power outage is the person who implements the method invention.

[0026] The power outage countermeasure set may be retrofitted, i.e., attached to an existing distribution board 8, or may be newly installed together with the distribution board 8, such as when building a new house or the like. In either case, for safety reasons, the construction company will shut off (open) the first and second branch switches 82, and then connect the first branch switch 81 to the first main input terminal 101 with the first main wiring 41, and connect the second branch switch 82 to the second main input terminal 102 with the second main wiring 42. In addition, the first load terminal 103 is connected to the first load 91 with the first load side feeder 43, and the second load terminal 104 is connected with the second load side feeder 44.

[0027] Then, the AC input terminal 21 of the portable storage battery 2 is connected to the storage battery input terminal 51 via the input side AC cable 24, the first output terminal 231 of the portable storage battery 2 is connected to the first storage battery output terminal 521 via the first output side AC cable 251, and the second output terminal 232 of the portable storage battery 2 is connected to the second storage battery output terminal 522 via the second output side AC cable 251. Furthermore, a solar power generation panel 3 is installed and connected to the DC input terminal 22 of the portable storage battery 2. The first switch 11 is set to the normal state, and the second switch 12 is also set to the normal state.

[0028] The switch device 1 is often fixed to a wall or the like near the distribution board 8. If there is no space to place the portable storage battery 2 near the distribution board 8, the portable storage battery 2 is installed at a location away from the distribution board 8, and the input AC cable 24 and the output AC cables 251, 252 are used that are accordingly longer. In order to be installed near the portable storage battery 2, the switch device 1 may also be installed at a location away from the distribution board 8. In this case, the first and second main wirings 41, 42 are lengthened accordingly.

[0029] Once each connection is completed in this manner, the construction company shorts (connects) first and second branch switches 81 and 82, thereby enabling power to be supplied from the grid. As a result, power storage in portable storage battery 2 begins using power from the grid. Furthermore, the pass-through function of portable storage battery 2 establishes electrical continuity between first branch switch 81 and first load 91, and grid power is supplied to first load 91. Similarly, electrical continuity between second branch switch 82 and second load 92 is established via second switch 12, and grid power is supplied to second load 92. As power storage in portable storage battery 2 progresses and reaches a fully charged state, the automatic stop function stops power storage. At the same time, the pass-through function continues power supply to first load 91.

[0030] When a power outage occurs due to a disaster or the like, the power outage detection function of portable storage battery 2 is activated, and an output voltage is generated at first output terminal 231 and second output terminal 232. Because first output terminal 231 is connected to first load 91 via first switch 11, power is automatically supplied to first load 91 from portable storage battery 2. When a power outage occurs, the user operates second switch 12 to switch second load 92 to the power outage state. This causes power to be supplied to second load 92 from second output terminal 232 of portable storage battery 2 via second switch 12. Therefore, even during a power outage, first load 91 and second load 92 can use electricity just as they normally would.

[0031] When power is restored (recovery from power outage), the power restoration detection function of portable storage battery 2 operates and sets the output at first output terminal 231 and second output terminal 232 to zero. For first load 91, the restored grid power is supplied as is due to the pass-through function of portable storage battery 2, and the state returns to normal. For second load 92, the user operates second switch 12 to return to normal. As a result, grid power is supplied to second load 92 from second branch switch 82, and the state returns to normal.

[0032] When disconnecting the portable storage battery 2 from the switch device 1 for outdoor use, etc., the user operates the first switch 11. That is, the user first sets the additional switch 16 to the OFF (open) state to ensure safety, and then sets the first switch 11 to the disconnection state. The second switch 12 is in the normal state unless there is a power outage, so no special switch operation is required. After doing this, the user disconnects the input AC cable 24 from the storage battery input terminal 51, and disconnects the first and second output AC cables 251, 252 from the first and second storage battery output terminals 521, 522. Although the portable storage battery 2 is disconnected, the first branch switch 81 is directly connected to the first load 91 via the first switch 11, and grid power continues to be supplied to the first load 91.

[0033] The power outage prevention set according to this embodiment, configured and operated as described above, allows loads to use electricity during a power outage using power stored during normal operation, providing an effective power outage prevention measure. Because the portable storage battery 2 is used as the storage battery, installation is inexpensive and easy, even for retrofitting. The portable storage battery 2 has another advantage: it can be removed during normal operation and used anywhere, such as outdoors. Furthermore, during a power outage, if there is a location other than the first and second loads 91 and 92 where electricity is needed, it can be taken there and used there. The provision of the additional switch 16 also enhances safety when removing the portable storage battery 2. That is, by turning the additional switch 16 off (open) in advance, even if the battery input terminal 103 is accidentally shorted when the portable storage battery 2 is removed, no overcurrent will flow and the breaker of the distribution board 8 will not be activated.

[0034] The power outage countermeasure set of the embodiment uses a single portable storage battery 2 with two output terminals 231, 232 to store electricity and supplies power to two loads 91, 92, respectively, during a power outage, resulting in a low-cost, more comprehensive power outage countermeasure. Portable storage batteries with multiple AC output terminals, such as the Anker Solix C1000 manufactured by Anker Japan, are known. However, these AC output terminals are provided for simultaneous use of multiple AC devices and are not intended to be used to switch to power lines from each branch switch on a distribution board to supply power to each load. The configuration of the embodiment anticipates future increases in the capacity and output of portable storage batteries, allowing a single portable storage battery to supply power to multiple loads during a power outage, resulting in a low-cost, more comprehensive power outage countermeasure.

[0035] The configuration of the embodiment also includes a suitable switch device 1 configuration for use in implementing more comprehensive power outage countermeasures at low cost. That is, since the first and second switches 11 and 12 are provided in a single switch box 15, installation can be completed by simply transporting the switch box 15 to a desired location, installing it, and wiring it. This also simplifies installation, and the switch device 1 as a whole has the advantage of being simple and compact. When implementing the present invention, it is also possible to provide the first switch 11 and the second switch 12 in separate switch boxes and install them separately. However, this tends to be structurally large and construction can be time-consuming.

[0036] Furthermore, the power outage countermeasure set of the embodiment includes the solar power generation panel 3, and the portable storage battery 2 has a DC input terminal 22 to which the solar power generation panel 3 is connected, so that part or all of the power until the battery is fully charged can be supplied by the solar power generation panel, resulting in a lower-cost power outage countermeasure. Also, by storing power using the solar power generation panel in parallel during a power outage, the time until the stored power in the portable storage battery 2 is used up can be extended. Furthermore, if the solar power generation panel 3 is portable, it can be taken out together with the portable storage battery 2, allowing the portable storage battery 2 to be charged outdoors, killing two birds with one stone.

[0037] In the first embodiment, when removing the portable storage battery 2, it is necessary to operate the first switch 11. If this operation is forgotten when the portable storage battery 2 is removed, the first branch switch 81 and the first load 91 are opened, causing the power supply to the first load 91 to be cut off, resulting in a state similar to that of a tripped breaker. There is no problem because power is restored by operating the first switch 11 after that, but to avoid such a situation, the first switch 11 may be an automatic switch. An example of the configuration of the automatic switch is disclosed in Patent Document 2, etc., so a detailed description thereof will be omitted.

[0038] Next, a power outage countermeasure method, a power outage countermeasure set, and a switch device for a portable storage battery according to a second embodiment will be described. Fig. 4 is a schematic diagram of the power outage countermeasure set according to the second embodiment. Fig. 5 is a schematic diagram showing switch operations during a power outage in the second embodiment. The power outage countermeasure set according to the second embodiment also includes a switch device 1, a portable storage battery 2, and a solar power generation panel 3. The switch device 1 corresponds to the switch device for a portable storage battery according to the second embodiment. The second embodiment shown in FIG. 4 differs from the first embodiment shown in FIG. 1 in that the portable storage battery 2 is configured to be in parallel with the first load 91 during normal operation (when storing electricity).

[0039] More specifically, in the second embodiment, as shown in FIG. 4, a line connected to the first main wiring 41 branches off to form an intra-box main line 17 and a storage battery input line 14. An additional switch 16 is also provided on the storage battery input line 14. The intra-box main line 17 extends from the branch point and is connected to a first load terminal 103 via a first switch 11. A first storage battery output terminal 521 is also connected to the first load terminal 103 via the first switch 11. The first switch 11 is normally (when there is no power outage) in a state where the intra-box main line 17 and the first load terminal 103 are short-circuited (hereinafter referred to as a storage battery off state). In the event of a power outage, the first switch 11 opens the intra-box main line 17 from the first load terminal 103 as shown in FIG. 5 and shorts the first storage battery output terminal 521 to the first load terminal 103 (hereinafter referred to as a storage battery on state).

[0040] As can be seen from Figure 5, when first switch 11 is in the battery-on state, first output terminal 231 of portable storage battery 2 and first load 91 are connected in series. That is, portable storage battery 2 is in parallel with first load 91 when storing electricity, but is in series with first load 91 when discharging. Portable storage battery 2 is connected to first branch switch 81 on the input side, but during a power outage, the power supply drops to zero, detecting the power outage and outputting power from first output terminal 231 to supply to first load 91. In addition, the user sets second switch 12 to the power outage state, so power is output from second output terminal 232 of portable storage battery 2 and supplied to second load 92.

[0041] In this second embodiment, too, power stored in portable storage battery 2 is supplied to first and second loads 91 and 92 during a power outage, enabling more extensive power outage countermeasures to be implemented at low cost. In the second embodiment, during a power outage, it is necessary to operate first switch 11 in addition to second switch 12, but when portable storage battery 2 is taken out (removed), it is not necessary to operate first switch 11 either. In this respect, it is simpler than the first embodiment.

[0042] Next, a power outage countermeasure set according to a third embodiment will be described below with reference to Fig. 6, which is a schematic diagram of the power outage countermeasure set according to the third embodiment. In the third embodiment, the specifications of the portable storage battery 2 differ from those of the first and second embodiments. That is, in the third embodiment, the portable storage battery 2 has three output terminals, first to third, 231, 232, and 233. The first and second output terminals 231 and 232 are terminals that output power at a rated voltage of 100 V, as in the first and second embodiments. The third output terminal 233 may also be rated at 100 V, but in this embodiment, it is a terminal that outputs power at a rated voltage of 200 V.

[0043] Meanwhile, in this embodiment, the distribution board 8 has a branch switch (hereinafter referred to as a 200V switch) 83 that distributes power at a rated voltage of 200V. The 200V switch 83 is for supplying power to a load (hereinafter referred to as a 200V load) 93 that consumes power at a rated voltage of 200V. An example of the 200V load 93 is an air conditioner.

[0044] In the third embodiment, the switch box 15 included in the switch device 1 is provided with a third main input terminal 105, a third switch 13, a third load terminal 106, and a third storage battery output terminal 523. A third main wiring 45 is provided connecting the 200V switch 83 and the third main input terminal 105, and the third load terminal 106 is connected to the 200V load 93 by a third power supply wiring. Of the third switch 13, the first selection terminal 131 is connected to the third main input terminal 105, the second selection terminal 132 is connected to the third storage battery output terminal 523, and the common terminal 133 is connected to the third load terminal 106 via a third load safety switch 191. The third switch 13 is a switch in which, under normal circumstances, the common terminal 133 is shorted to the first selection terminal 131 and is open from the second selection terminal 132 (normal state), and in the event of a power outage, the common terminal is shorted to the second selection terminal 132 and is open from the first selection terminal 131 (state for power outages).

[0045] The power outage prevention set of the third embodiment is also installed in the same manner as the first embodiment, except that it is also connected to a third load 93. That is, the first branch switch 81 and the first main input terminal 101 are connected by the first main wiring 41, and the second branch switch 82 and the second main input terminal 102 are connected by the second main wiring 42. Furthermore, the 200V switch 83 and the third main input terminal 105 are connected by the third main wiring 45. On the load side, the first load terminal 103 is connected by the first load feeder 43, the second load terminal 104 is connected by the second load feeder 44, and the third load terminal 106 is connected to the third load 93 by the third load feeder 46.

[0046] In this state, power is normally stored in portable storage battery 2, and when a power outage occurs, output occurs at each of output terminals 231, 232, and 233 of portable storage battery 2. The power output from first output terminal 231 is supplied directly to first load 91. The user then sets second switch 12 to the power outage state and also sets the third switch to the power outage state. As a result, power is supplied from second and third output terminals 232 and 233 to second and third loads 92 and 93, making it possible for first to third loads 91, 92, and 93 to use electricity during a power outage.

[0047] According to the third embodiment, power is supplied from one portable storage battery 2 to loads of different voltages during a power outage, providing a low-cost and more comprehensive power outage countermeasure. The example in Fig. 6 is a configuration in which a third main input terminal 105, a third switch 13, a third load terminal 106, and a third storage battery output terminal 523 are added to the configuration of the first embodiment, but a configuration in which a third main input terminal 105, a third switch 13, a third load terminal 106, and a third storage battery output terminal 523 are added to the configuration of the second embodiment may also be used.

[0048] In each of the above embodiments, the switch box 15 may not be provided with the main input terminals 101, 102, and 105 or the load terminals 103, 104, and 106, and may simply have cables extending therethrough. That is, the cables serving as the main wiring 41, 42, and 45 may extend therethrough and be connected to the first selection terminal 111 of the first switch 11, the first selection terminal 121 of the second switch 12, and the first selection terminal 131 of the third switch 13, respectively. Similarly, there is also a case where the cable as the first load side feeder 43 connected to the common terminal 113 of the first switch 11 extends directly to be connected to, for example, a power outlet as the first load 91, the cable as the second load side feeder 44 connected to the common terminal 123 of the second switch 11 extends directly to be connected to, for example, a power outlet as the second load 92, and the cable as the third load side feeder 46 connected to the common terminal 133 of the third switch 13 extends directly to be connected to, for example, a power outlet as the second load 92. In such a configuration, the switch box 15 is provided with openings through which these cables are inserted.

[0049] The power outage countermeasure methods and power outage countermeasure sets of the above-described embodiments can be applied to distribution boards in residences such as detached houses and apartment complexes, as well as non-residential buildings such as offices and government offices. For example, in government offices that serve as a command center for response in the event of a disaster, it is necessary to ensure the minimum necessary power source (such as a power source for contacting relevant parties) even in the event of a power outage. For this purpose, the power outage countermeasure methods and power outage countermeasure sets of the respective embodiments can be implemented. [Explanation of symbols]

[0050] 1 Switching device 10 Switch Box 101 First main input terminal 102 Second main input terminal 103 First load terminal 104 Second load terminal 105 Third main input terminal 106 Third load terminal 11 First Switch 12 Second Switch 13 The Third Switch 14 Battery input line 15 Switch Box 16 additional switches 17 Main line inside the box 2 Portable storage batteries 21 AC input terminal 22 DC input terminal 231 First output terminal 232 Second output terminal 233 Third output terminal 3. Solar panels 41 First main wiring 42 Second main wiring 43 First load feeder 44 Second Load Supply 45 Third main wiring 46 Third Load Feed Line 51 Battery input terminal 521 First battery output terminal 522 Second battery output terminal 523 Third battery output terminal 8 Distribution board 81 First Branch Switch 82 Second branch switch 83 200V switch

Claims

1. A power outage countermeasure method for a user who owns a distribution board with multiple branch switches, in which a portable battery is connected to the distribution board via multiple switches to prepare for a power outage. The portable battery has an input terminal and first and second output terminals; a first branch switch among the plurality of branch switches in the distribution board is a switch connected to a first load and supplies power from the grid, and a second branch switch is a switch connected to a second load and supplies power from the grid, connecting a first branch switch to an input terminal of the portable battery and connecting the first branch switch to a first load via a first switch; a method of connecting a second branch switch to a second load via a second switch, a method for supplying power from a first branch switch to a first load via a first switch and supplying power from a second branch switch to a second load via a second switch while charging a portable storage battery with power from a first branch switch during a non-power outage; A method for supplying power during a power outage by connecting a first output terminal of a portable storage battery containing stored power to a first load via a first switch, and connecting a second output terminal of the portable storage battery containing stored power to a second load via a second switch, the first switch is a switch that, when a first output terminal of the portable storage battery is connected to a first load during a power outage, disconnects the first output terminal from the first branch switch; The power outage countermeasure method is such that the second switch is a switch that disconnects the second output terminal of the portable storage battery from the second branch switch when the second output terminal is connected to a second load during a power outage.

2. A power outage prevention set that is attached to a distribution board having a plurality of branch switches, and includes a portable storage battery and a switch device, a first branch switch among the plurality of branch switches in the distribution board is a switch connected to a first load and supplies power from the grid, and a second branch switch is a switch connected to a second load and supplies power from the grid, the switch device is a device interposed between the first and second branch switches and the first and second loads, and the portable battery is a battery attached to the switch device; The portable battery has an input terminal and first and second output terminals; a battery power supply wiring is provided that connects the first branch switch and an input terminal of the portable battery; The switch device includes a first switch and a second switch, the first switch is interposed between the first branch switch and the first load, and when there is no power outage, power is supplied to the portable battery via the battery power supply wiring so that the power is stored, and when there is a power outage, a first output terminal of the portable battery is connected to the first load to supply power, thereby setting the portable battery in a power outage power supply state, and in the power outage power supply state, the first output terminal is disconnected from the first branch switch; the second switch is a switch interposed between the second branch switch and the second load, and connects the second branch switch to the second load when there is no power outage, and connects the second output terminal of the portable storage battery to the second load when there is a power outage, thereby establishing a power supply state during power outage, and in the power supply state during power outage, the second output terminal is disconnected from the second branch switch; A power outage prevention set characterized in that, when the portable storage battery is removed from the switch device, the connection state between the first branch switch and the first load and the connection state between the second branch switch and the second load are maintained.

3. A portable battery switch device is used when attaching a portable battery having one input terminal and a plurality of first and second output terminals to a distribution board having a first branch switch connected to a first load and supplying power from a grid to the first load, and a second branch switch connected to a second load and supplying power from the grid to the second load, and is interposed between the distribution board and the first and second loads, the power supply system includes a battery power supply wiring that connects the first branch switch and an input terminal of the portable battery, a first switch, and a second switch; the first switch is interposed between the first branch switch and the first load, and when there is no power outage, power is supplied to the portable battery via the battery power supply wiring so that the power is stored, and when there is a power outage, a first output terminal of the portable battery is connected to the first load to supply power, thereby setting the portable battery in a power outage power supply state, and in the power outage power supply state, the first output terminal is disconnected from the first branch switch; the second switch is a switch interposed between the second branch switch and the second load, and connects the second branch switch to the second load when there is no power outage, and connects the second output terminal of the portable storage battery to the second load when there is a power outage, thereby establishing a power supply state during power outage, and in the power supply state during power outage, the second output terminal is disconnected from the second branch switch; A portable battery switch device characterized in that, when the portable battery is removed, the connection state between the first branch switch and the first load and the connection state between the second branch switch and the second load are maintained.

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