Emergency power system control method

Abstract

To enable long-time use without stopping power supply and allow easy maintenance.SOLUTION: An emergency power source system 1 includes a basic rack 2 that has a plurality of battery units 7 formed of secondary batteries detachably mounted on a casing 4, an extension rack 3 that is electrically connected to the base rack 2, is attachable to / detachable from a casing 14, and has a plurality of battery units 17 mounted thereon, and a basic control unit that is mounted on the basic rack 2 and is for controlling output / input of power from the battery units 7, 17. In case of emergency, the batteries on the basic rack 2 are carried out within a portable time period, and the extension rack 3 is used by being connected to the basic rack 2. The battery units are attachable to / detachable from the respective racks. Accordingly, replacement and replenishment are easy, and any particular maintenance is not required in case of emergency.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a control method for an emergency power supply system, and more particularly to a control method for an emergency power supply system that can be used continuously for a long period of time when commercial power is unavailable in the event of a disaster, accident, or the like. [Background technology]

[0002] In times of disaster, when commercial power sources are unavailable due to a power outage, engine-driven generators are used as emergency power sources. In particular, in the case of emergency generator systems that supply power to public mobile phone base stations, etc., if the commercial power source becomes unavailable, the system must start up immediately and provide continuous power without being shut off even temporarily.

[0003] However, because small generators are equipped with only a limited amount of fuel, when the fuel runs out, power generation must be temporarily stopped and fuel must be replenished in the built-in tank. To solve this operational problem, the inventor proposed a small generator for emergency use that can easily extend its operating time in the event of an emergency or disaster (Patent Document 1).

[0004] Meanwhile, the use of high-energy-density lithium-ion batteries and the like as emergency power sources has become known in recent years. One proposed system, consisting of a base unit, a rack with casters equipped with a storage battery, and an expansion unit, has been arranged, with the base unit equipped with an AC / DC charger and a DC / AC converter, and the expansion cart equipped with only the AC / DC charger (Patent Document 2). Another proposed uninterruptible power supply for use in data centers is one in which battery units of the same shape and specifications are housed in a rack (Patent Document 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-83305 [Patent Document 2] Utility model registration No. 3170407 [Patent Document 3] WO2014 / 141486 Summary of the Invention [Problem to be solved by the invention]

[0006] The small emergency generator described in Patent Document 1 uses an engine to generate power, which makes it noisy and unusable at night or in densely populated residential areas. The emergency power supply described in Patent Document 2 aims to increase the power supply capacity, but is not designed to allow for easy attachment and detachment of individual storage batteries for replacement, nor is it capable of continuously supplying power without interrupting the supply of power. The uninterruptible power supply described in Patent Document 3 is intended for use in relatively large-scale systems such as data centers, and is not intended for use in places with low output such as mobile phone base stations. Therefore, batteries cannot be easily replaced or expanded.

[0007] In light of the above background, the present invention has the following objectives. An object of the present invention is to provide a method for controlling an emergency power supply system that can be used for a long period of time without interrupting the power supply. Another object of the present invention is to provide a method for controlling an emergency power supply system equipped with a battery unit that can be easily attached, detached, replaced, replenished, etc. without interrupting the power supply. It is still another object of the present invention to provide a hmm To provide a control method for an emergency power supply system that does not require maintenance. [Means for solving the problem]

[0010] The control method for the emergency power supply system of the present invention 1 comprises: A first housing (4), a base rack (2) having a plurality of first battery units (7, 7a) detachably mounted on the first housing (4); A second housing (14), an expansion rack (3) electrically connected to the base rack (2) and having second battery units (17, 17a) which are secondary batteries detachably mounted on the second housing (14); a basic control unit (9) mounted on the basic rack (2) for controlling the output or input of power from the first battery unit (7, 7a); an expansion control unit (19) mounted on the expansion rack (2) for controlling the output or input of power from the second battery unit (17, 17a); The first housing (4) and the second housing (14) are provided with casters (5, 15) for making them movable, The first battery unit (7, 7a) or the second battery unit (17, 17a) A communication method to notify the administrator of the remaining capacity of the Equipped with In the emergency power supply system, The aforementioned The basic control unit (9) and the expansion control unit (19), the first battery unit (7, 7a) and the second battery unit (17, 17a), respectively specifying the order in which power is output from The first battery unit (7, 7a) or the second battery unit (17, 17a) When the storage capacity of the battery falls below a preset capacity, the battery The first battery unit (7, 7a) or the second battery unit (17, 17a) It is an output control that outputs from the law of nature, The output control calculates the available time (55) of the base rack (2) and the extension rack (3) and notifies the administrator via the communication means. Terminal screen (50) notified and The available operation time (55) is used to notify the predicted available operation time of the base rack (2) and the expansion rack (3). A control method for an emergency power supply system.

[0011] The control method for an emergency power supply system according to the second aspect of the present invention is the same as that according to the first aspect of the present invention, The power output The basic Racks (2) All in The first battery unit (7, 7a) When the capacity of the expansion rack (2) is less than the capacity of the expansion rack (2), The second battery unit (17, 17a) Output from All of the expansion racks (2) The second battery unit (17, 17a) When the capacity of the base rack (2) is less than the capacity of the base rack (2), First battery unit (7, 7a) The present invention is characterized in that it outputs from [Effects of the Invention]

[0014] The control method of the emergency power supply system of the present invention can supply power for a long period of time without interrupting the power supply, and the battery unit can be easily attached, detached, replaced, replenished, etc. Furthermore, in an emergency, special memory can be used simply by replacing the battery unit. hmm There is no need for maintenance. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is an external view showing the external appearance of an emergency power supply system 1 according to the first embodiment. [Figure 2] FIG. 2 is a functional block diagram showing the flow of power in the emergency power supply system 1. As shown in FIG. [Figure 3] FIG. 3 is a functional block diagram showing the flow of control signals in the emergency power supply system 1. As shown in FIG. [Figure 4] FIG. 4 shows an example of a screen on the terminal of a person in charge of managing the emergency power supply system 1. [Figure 5] FIG. 5 is an example of the operation of the control unit of the basic rack, and is a flow chart showing the output management of each battery unit. [Figure 6] FIG. 6 is an external view showing the external appearance of the emergency power supply system 1 according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] [First embodiment] A first embodiment of the emergency power supply system of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing the exterior of an emergency power supply system 1 according to the first embodiment. The emergency power supply system 1 is used, for example, as a power source for a mobile phone base station or the like. The emergency power supply system 1 supplies power of an appropriate voltage and current to a connected device (load), and is capable of outputting, for example, a voltage of 48 V and a current of 27 A for 12 hours. The emergency power supply system 1 comprises a base rack 2 and an expansion rack 3. The base rack 2 is provided with a housing 4 that forms the main frame, and is provided with a plurality of casters 5 at the bottom for mobility. A handrail 6 is attached to the top of the housing 4 to be used as a handle when moving the rack. The base rack 2 is brought in from outside and used, for example, as a power source for a mobile phone base station or the like in an emergency, but it may also be provided as an emergency power source.

[0017] Three rectangular parallelepiped spaces are formed on the front of the housing 4. The battery units 7 can be individually stored and removed from the housing 4 like drawers. For this convenience, a handle 8 is provided on the front of the battery units 7. The battery units 7(1) to 7(3) can be, for example, lithium The battery unit 7 is made up of a lithium-ion battery (Li-ion battery), a lithium iron phosphate (LFP), etc. A basic control unit 9 is mounted in the housing 4 above the battery unit 7. The basic control unit 9 houses a control device that monitors and controls the input and output of power to the emergency power supply system 1. The basic control unit 9 is hmm It can be freely pulled out and stored from the housing 4 for ease of maintenance, etc. The battery unit 7 in the basic rack 2 is normally kept fully charged with power from the commercial power source, and automatically supplies power in emergencies when the commercial power source is unavailable.

[0018] The expansion rack 3 has a housing 14 that forms the main frame, and is equipped with multiple casters 15 at the bottom to allow it to be moved. A handrail 16 is attached to the top of the housing 14 for use when moving it. A cubic space is formed in front of the housing 14 to store three layers of battery units 17, one above the other. The battery units 7 can be individually stored and removed from the housing 4 like drawers. For this convenience, a handle 18 is provided on the front of the battery units 17. An expansion control unit 19 of the expansion rack 3 monitors and controls the input and output of power to the battery units 17. In other words, the structure of the housing 14 and the arrangement of the battery units 17 of the expansion rack 3 are the same as those of the basic rack 2.

[0019] The expansion rack 3 is used when the capacity of the three battery units 7(1) to 7(3) in the basic rack 2 is insufficient. For this purpose, the basic rack 2 and the expansion rack 3 are connected by electric wires 10, which include power lines and signal lines. The expansion rack 3 is generally connected to the basic rack 2 and used in emergencies such as disasters when commercial power is unavailable. The battery units 17(1) to 17(3) in the expansion rack 3 are charged at a local base where commercial power is available and then transported to the facility where the basic rack 2 is installed for installation. Alternatively, the individual battery units 7(1) to 7(3) and 17(1) to 17(3) in the basic rack 2 and the expansion rack 3 may be charged using an engine-driven emergency power source, a power source installed in an automobile, or the like.

[0020] The front of each battery unit 7(1)-7(3), 17(1)-17(3) has a barcode 11 indicating its identification number and a capacity indicator 12 indicating the battery capacity status. The barcode 11 is a number unique to the battery unit and can be read with a barcode reader or the like. The capacity indicator 12 consists of a small display-type indicator that displays the battery capacity in multiple stages, an LED lamp that lights up or flashes in multiple colors depending on the battery capacity, or the like. The flow of power in the emergency power supply system 1 will be explained with reference to Figure 2. The load 40 receives power from the emergency power supply system 1. The load 40 is, for example, a component device such as a mobile phone base station. The load 40 basically receives power from the basic rack 2. The load 40 receives power by being connected to a power cable (not shown) or the like connected to the power output of the basic control unit 9.

[0021] As shown in Figure 2, the basic rack 2 comprises multiple batteries 7, a voltage / current regulator 21, a switching circuit 22, a charger 23, etc. The expansion control unit 19 comprises a switching circuit 32, a charger 33, etc. The voltage / current regulator 21 has an input connected to the switching circuit 22 and the switching circuit 32 and is supplied with power from the battery unit 7 or the battery unit 17, and an output connected to the load 40 to supply power. The voltage / current regulator 21 is connected to the battery unit 7 and the battery unit 17 and monitors the capacity of the battery units 7(1) to 7(3) and 17(1) to 17(3) that make up each battery unit 7 and 17. When the capacity falls below a predetermined capacity, the voltage / current regulator 21 controls the switching circuit 22 and the switching circuit 32 to sequentially switch between the battery units to receive power.

[0022] Hereinafter, in the battery unit 7, the battery of the battery unit 7(1) may be referred to as battery 1, the battery of the battery unit 7(2) as battery 2, and the battery of the battery unit 7(3) as battery 3. The same applies to the battery unit 17. A manual switch 24 for priority switching of the expansion rack is provided between the switching circuit 22 of the basic rack 2 and the voltage / current adjustment device 21. The manual switch 24 for priority switching of the expansion rack is manually switched by a worker or the like. not present Connection Status ( OFF ), the voltage and current regulator 21 receives power preferentially from the expansion rack 3. When the expansion rack priority changeover manual switch 24 is switched, There are situation( ON ), the voltage and current regulator 21 receives power supply from the base rack 2 with priority.

[0023] The switching circuit 22 of the basic rack 2 is connected to each of the battery units 7(1) to 7(3) and switches the connection between these units and the voltage / current regulator 21. The switching circuit 22 operates under the control of the voltage / current regulator 21 and switches the connection to the battery units 7(1) to 7(3). The charger 23 has an input connected to the external power source 41 and an output connected to the battery units 7(1) to 7(3), converts the voltage of the external power source 41 to a voltage for the battery units 7(1) to 7(3), and charges the battery units 7(1) to 7(3). The charger 23 is basically connected in parallel to each of the battery units 7(1) to 7(3), and charges each of the battery units 7(1) to 7(3) simultaneously.

[0024] The charger 23 measures the voltage of each battery unit 7(1) to 7(3) and charges the battery unit 7(1) to 7(3) when the capacity of the battery unit 7(1) to 7(3) falls below a predetermined capacity. The charger 23 simultaneously charges the battery units 7(1) to 7(3) as described above, but may also charge only the battery unit 7(1) to 7(3) that has fallen below a predetermined capacity. The external power source 41 may be any power source, such as a 100V or 200V commercial power source (grid power), a generator (including a diesel generator or a gas generator), or a solar panel, and is not particularly limited. The external power source 41 is preferably a commercial power source in areas where power infrastructure is widespread, and a solar panel in remote areas. The external power source 41 may also be a hybrid power source connected to both a solar panel and a commercial power source via a distribution board.

[0025] The expansion rack 3 comprises a plurality of batteries 17, a switching circuit 32, a charger 33, etc. The switching circuit 32 of the expansion rack 3 is connected to each of the battery units 17(1) to 17(3) and switches the connection between these units and the voltage / current regulator 21. The switching circuit 32 operates under the control of the voltage / current regulator 21 and switches the connection with the battery units 17(1) to 17(3). The charger 33 has an input connected to an external power supply and an output connected to the battery units 17(1) to 17(3), converting the voltage of the external power supply into voltage and current for the battery units 17(1) to 17(3) and charging the battery units 17(1) to 17(3). The charger 33 is basically connected in parallel to each of the battery units 17(1) to 17(3) and simultaneously charging each of the battery units 17(1) to 17(3).

[0026] The expansion rack 3 is portable and connected to the basic rack 2 in an emergency such as a disaster, and the external power source for charging the expansion rack 3 is basically a commercial power source from the grid, but any power source such as a generator (including a diesel generator or a gas generator), solar panels, or a combination thereof may also be used, and there is no particular limitation on the type of power source. Next, the flow of control signals in the emergency power supply system 1 will be explained with reference to Figure 3. As shown in Figure 3, the basic rack 2 is equipped with an interface 25, a basic control unit 26, a battery sensor 27, a voltage adjustment circuit 28, a communication interface 29, etc. The basic control unit 26 controls the entire basic rack 2 and is composed of, but not limited to, a microcomputer, a module, an LSI, etc.

[0027] The basic control unit 26 is connected to the charger 23, interface 25, communication interface 29, etc., receives data collected by these components, and transmits control commands and data. The interface 25 is connected to battery sensors 27(1) to 27(3) of each battery unit 7(1) to 7(3), and transmits data output by these sensors to the basic control unit 26. The battery sensors 27 monitor the capacity of each battery unit 7, are connected to the battery units 7, and measure their voltage, current, resistance, temperature, etc. The battery sensors 27 particularly measure the voltage of the batteries. The basic control unit 26 controls the interface 25, switching circuit 22, and expansion control unit 36 ​​of the expansion rack 3 to select a battery to output power and connect it to the voltage adjustment circuit 28.

[0028] In other words, the basic control unit 26 sequentially selects a usable battery unit from the batteries of battery units 7(1)-7(3) and battery units 17(1)-17(3) and supplies power to the load 40. The basic control unit 26 automatically disconnects a battery unit with low capacity and connects to the next usable battery unit. The basic control unit 26 acquires data indicating the capacity status of each battery unit from each battery sensor 27, 37 and transmits the data to the management server 43 via the communication interface 29. The basic control unit 26 transmits data regarding the status of the emergency power supply system 1 to the management server 43 periodically at set intervals, at set times, and upon a request from the management server 43. The basic control unit 26 also transmits data regarding the emergency power supply system 1 to the management server 43 when the operational time of the emergency power supply system 1 falls within a set time.

[0029] The expansion rack 3 is equipped with an interface 35, an expansion control unit 36, a battery sensor 37, a voltage adjustment circuit 38, etc. The expansion control unit 36 ​​controls the entire expansion rack 3, and is composed of, but not limited to, a microcomputer, a module, an LSI, etc. The expansion control unit 36 ​​is connected to the interface 35 and receives data from the battery sensor 37. The expansion control unit 36 ​​controls the interface 35 and the switching circuit 32, connects the battery that outputs power to the basic rack 2, and controls the power output. The interface 35 is connected to each battery sensor 37 and sends the measured value to the expansion control unit 36. Battery sensor 3 7 is each battery unit 1 7, intended to monitor the capacity of the battery unit 1 7 and consists of various sensors that measure the voltage, current, resistance, temperature, etc.

[0030] The battery sensor 27 measures the voltage of a general battery. The voltage regulation circuits 28 and 38 regulate the voltage of the output power to a constant level and are equipped with functions such as overcurrent prevention. The communication interface 29, although not shown, is used to connect communication devices and communicate data with a communication network. The communication devices referred to here are wireless or wired communication devices that are built into the base rack 2 or connected externally, and may be used to communicate with the Internet 4, for example. 2 The device may be a wireless adapter that connects to a wireless access point, or a mobile phone that communicates with a mobile communication network. 3 In this case, the communication network is the Internet4 2 However, there is no particular limitation, and it may be a wireless communication network, a wired communication network, or the like.

[0031] The management server 43 is a system server that manages the emergency power supply systems 1. The management server 43 has a database (not shown) that stores data related to the emergency power supply systems 1, and transmits data indicating the status of each emergency power supply system 1 to the administrator, who then displays this data on a device carried by the administrator. The data related to the emergency power supply systems 1, as will be described later, includes data indicating the identification number of the emergency power supply system 1, the installation location (address), the capacity and operational time of the battery units 7(1) to 7(3) in the base rack 2 and the battery units 17(1) to 17(3) in the expansion rack 3, and the like. The management server 43 communicates with a communication device connected to the communication interface 29 of the base rack 2 via a communication network such as the Internet 40, and receives data on the emergency power supply systems 1.

[0032] FIG. 4 shows an example of a screen 50 of a terminal of a person in charge of managing the emergency power supply system 1. The screen 50 is composed of multiple areas. First, it comprises a base station data area 51, a battery data area 52, etc. The battery data area 52 comprises a base rack area 53 showing data on the base rack 2, an expansion rack area 54 showing data on the expansion rack 3, and a predicted operational time area 55 showing data predicting the operational time of the emergency power supply system 1. The base station data area 51 contains the address indicating the location where the emergency power supply system 1 is installed, the management number of the emergency power supply system 1, etc. The base rack area 53 displays, in tabular form, the names of the battery units 7(1) to 7(3) that make up the base rack 2, their remaining capacity, operational status, the percentage of the remaining capacity relative to the rated capacity, etc. In this example, the operational status is displayed as "operating" for a battery currently supplying power, and "not operating" for a battery not supplying power.

[0033] The expansion rack area 54 is ExpansionThe names of the battery units 17(1) to 17(3) that make up the rack 3, their remaining capacity, operational status (operating, not operating), the percentage of the remaining capacity relative to the rated capacity, etc. are displayed in tabular form. The predicted operational time area 55 shows data predicting the operational time for each of the base rack 2 and the expansion rack 3. For example, the base rack 2 and the expansion rack 3 are each operable from the displayed time on the screen 50 of the person in charge's terminal, and the available time is displayed in year / month / day, hour, and minute format. The screen 50 may also have an instruction button to request data transmission from the emergency power supply system 1. The screen 50 is an example, and the display menu can be changed as needed.

[0034] [Operation flow] An example of the operation of the control unit of the basic rack 2 will be described with reference to the flow chart of FIG. hmm When used during normal operation, such as during maintenance, the emergency power supply system 1 is connected to the external power source 41 and operates (steps 1 and 2). When the commercial power source of the external power source 41 is available, the emergency power supply system 1 continues to receive power and supplies power to the load 40 (step 2). When the commercial power source of the external power source 41 is unavailable, the system enters emergency operation mode (steps 2 to 3). This situation can occur when the commercial power infrastructure becomes unusable due to, for example, a natural disaster such as an earthquake, tsunami, typhoon, or flood, a man-made accident or disaster, or a shortage of power supply capacity of the commercial power source. The basic control unit 26 acquires data from the battery sensors 27(1) to 27(3) of the battery units 7(1) to 7(3) of the basic rack 2 (step 3).

[0035] The basic control unit 26 determines whether the batteries of the battery units 7(1) to 7(3) are usable (step 4). If the battery units 7(1) to 7(3) are unusable, the process proceeds to a step of acquiring data from the battery sensors 37(1) to 37(3) of the battery units 17(1) to 17(3) of the extension rack 3 (step 4 → step 11). Here, if all of the battery units 7(1) to 7(3) of the basic rack 2 are unusable, the basic control unit 26 proceeds to checking the battery units 17(1) to 17(3) of the extension rack 3 (step 4 → step 11). If the battery units 7(1) to 7(3) of the basic rack 2 are usable, the capacity of each battery unit 7(1) to 7(3) is checked (steps 5 to 10).

[0036] First, use of the battery unit 7(1) is started. At appropriate intervals, the capacity of the battery unit 7(1) is checked to determine whether it is within the set capacity (steps 5 and 6). If the capacity of the battery unit 7(1) is within the set capacity, in other words, if it is usable, use of the battery unit 7(1) continues (step 6 → step 5). At this time, the switching circuit 22 connects the battery unit 7(1) to the voltage / current regulator 21, and is in a state where it receives power supply from the battery unit 7(1). If the capacity of the battery unit 7(1) is below the set capacity but not within it, in other words, if it is unusable, the capacity of the battery unit 7(2) is checked to determine whether it is within the set capacity (step 7).

[0037] If the capacity of battery unit 7(2) is within the set capacity, in other words, if it is usable, switching circuit 22 switches to use of battery unit 7(2) and power is supplied from battery unit 7(2) (step 8). If the capacity of battery unit 7(2) is below the set capacity but not within it, in other words, if it is unusable, the next battery is used. In this case, the capacity of battery unit 7(3) is checked to determine whether it is within the set capacity (step 7 → step 10). While battery unit 7(2) is in use, it is checked at predetermined intervals whether its capacity is within the set capacity, and it is constantly checked whether to stop use of battery unit 7(2) and switch to the next battery unit (step 9 and step 8 are repeated). In this way, the battery units are used in order, and use of a battery unit below the set capacity is stopped and switched to the next battery unit.

[0038] In this example, there are three battery units, so the last step is to check the capacity of the battery unit 7(3) and determine whether it is within the set capacity (step 10). If the capacity of the battery unit 7(3) is equal to or less than the set capacity, in other words, and If the basic rack 2 is unavailable, the process proceeds to check the capacity of the battery unit in the expansion rack 3 (step 10 → step 11). Expansion rack 3 The basic control unit 26 acquires data from the battery sensors 37(1) to 37(3) of the battery units 17(1) to 17(3) (step 11). The basic control unit 26 determines whether the battery units 17(1) to 17(3) are usable (step 12). If the battery units 17(1) to 17(3) are not usable, the administrator is notified that the battery units 17 are unusable (step 12 → step 13).

[0039] This notification is sent to the management server 43 via the communication interface 29, and is ultimately displayed on the system management screen, the administrator's mobile terminal, etc. If the battery units 17(1) to 17(3) are available for use, the capacity of each battery unit 17(1) to 17(3) is checked (steps 12 to 14). First, use of the battery unit 17(1) is started, and its capacity is checked at appropriate intervals to determine whether it is within the set capacity (step 16). If the capacity of the battery unit 17(1) is within the set capacity, in other words, and If the battery unit 17(1) is usable, the battery unit 17(1) continues to be used (step 15 → step 14). hmm The battery unit 17(1) and the voltage / current regulator 21 are connected to the power supply circuit 32, and the power supply circuit 32 receives power from the battery unit 17(1).

[0040] If the capacity of battery unit 17(1) is not within the set capacity but is below it, in other words, if it is unusable, the capacity of battery unit 17(2) is checked to determine whether it is within the set capacity (step 16). If the capacity of battery unit 17(2) is within the set capacity, in other words, if power output is possible (usable), the switching circuit 32 switches to use of battery unit 17(2) and power is supplied from battery unit 17(2) (step 16 → step 17). If the capacity of battery unit 17(2) is not within the set capacity but is below it, in other words, if it is unusable, the next battery unit is selected; in this case, the capacity of battery unit 17(3) is checked to determine whether it is within the set capacity (step 16 → step after step 18).

[0041] While the battery unit 17(2) is in use, it is checked at predetermined intervals whether its capacity is within the set capacity (steps 17 and 18). If the capacity of the battery unit 17(2) is below the set capacity, the system moves to the next battery unit or notifies the administrator (steps 18 and 19).

[0042] [Second embodiment] FIG. 6 illustrates the external appearance of an emergency power supply system 1 according to a second embodiment of the present invention. The emergency power supply system 1 according to the second embodiment of the present invention is basically the same as the emergency power supply system 1 according to the first embodiment of the present invention described above, except for the number and arrangement of the housings 4a of the base rack 2 and the housings 14a of the extension rack 3, and the battery units 7a and 17a housed therein. In this example, the battery units 7a are arranged in two rows and two columns in the housing 4a. Similarly, the battery units 17a are arranged in two rows and two columns in the housing 14a. The handrails 6a and 16a installed on the tops of the housings 4a and 14a are arranged vertically when viewed from the front.

[0043] [Other embodiments] The base rack in the above-described embodiment is equipped with casters for mobility. However, the base rack may not be movable. While the examples show three and four battery units in the base rack and expansion rack, more than one battery unit may be used, and even a single battery unit may be used if the capacity is large enough. Furthermore, in the above-described embodiment, for example, if three battery units run out of capacity during operation with four battery units, and the fourth battery unit is still in operation, the control system may manually turn off the fourth battery unit and switch to the first battery unit, replacing the fourth battery unit. This allows for longer intervals between on-site battery unit replacements. [Explanation of symbols]

[0044] 1. Emergency power supply system 2...Basic rack 3...Extension rack 4, 14...Housing 5, 15... Caster 6, 6a, 16, 16a...Handrails 7, 7a, 17, 17a... Battery unit 8, 18...Handle 9...Basic control unit 10...Electric wire 11...Barcode 12...Capacity indicator 19...Additional control unit 21...Voltage and current regulator 22, 32...Switching circuit 23, 33…Charger 24...Manual switch for priority switching of expansion rack 25, 35 interface 26...Basic control unit 27, 37...Battery sensor 28, 38...Voltage adjustment circuit 29...Communication interface 36...Additional control unit 40...Load 41…External power supply 42...Internet 43...Administration Server 50...screen (example)

Claims

1. A first housing (4), a base rack (2) having a plurality of first battery units (7, 7a) detachably mounted on the first housing (4); a second housing (14); an expansion rack (3) electrically connected to the base rack (2) and having second battery units (17, 17a) which are secondary batteries detachably mounted on the second housing (14); a basic control unit (9) mounted on the basic rack (2) for controlling the output or input of power from the first battery unit (7, 7a); an expansion control unit (19) mounted on the expansion rack (2) for controlling the output or input of power from the second battery unit (17, 17a); The first housing (4) and the second housing (14) have casters (5, 15) for making them movable; a communication means for notifying a manager at a remote location of the remaining capacity of the first battery unit (7, 7a) or the second battery unit (17, 17a); In an emergency power supply system comprising: an output control that specifies the order of power output from the first battery unit (7, 7a) and the second battery unit (17, 17a) in the basic control unit (9) and the expansion control unit (19), respectively, and outputs power from the next-ranked first battery unit (7, 7a) or second battery unit (17, 17a) when the storage capacity of the first battery unit (7, 7a) or the second battery unit (17, 17a) falls below a preset capacity; The output control is to calculate the available operation time (55) of the base rack (2) and the expansion rack (3) and notify the administrator on the terminal screen (50) via the communication means, The available operation time (55) is a time when the notification is made predicting the available operation time of each of the base rack (2) and the expansion rack (3). A control method for an emergency power supply system.

2. 2. The method for controlling an emergency power supply system according to claim 1, When all of the first battery units (7, 7a) in the basic rack (2) fall below the capacity, the power is output from the second battery unit (17, 17a) in the expansion rack (2), When the second battery units (17, 17a) in all the expansion racks (2) fall below the capacity, power is output from the first battery units (7, 7a) in the basic rack (2).

1. A control method for an emergency power supply system, comprising:

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