Installation and connection structure of secondary circuit of micro-grid battery energy storage integrated device

Abstract

The invention discloses a mounting and connecting structure of a secondary circuit of a micro-grid battery energy storage integrated device. A machine frame is formed by welding a front plate, a rear panel, a right side plate, a left side plate, a right partition plate and a left partition plate; the machine frame is longitudinally divided into an alternating-current box, a converter box and a direct-current box by the right partition plate and the left partition plate; a middle partition plate is arranged in the converter box, the middle partition plate is short and welded to the rear panel, and the converter box is divided into an upper converter chamber, a lower converter chamber and a front converter chamber through the middle partition plate. The machine frame is provided with an upper cover plate and a lower cover plate; the device comprises a metal flat box type modularized PCS secondary circuit box, a BMS secondary circuit box, an FMS secondary circuit box, a PMS secondary circuit box, an EMS secondary circuit box, an AC / DC direct current working power supply box and a DC / DC direct current working power supply box. According to the invention, the secondary circuit in the PCS is separated, and the secondary circuit is modularized, so that the integration of the PCS, the BMS, the FMS, the PMS and the EMS for micro-grid battery energy storage can be simply and reliably realized with low cost.

Description

Technical Field

[0001] The invention relates to an installation and connection structure of a secondary circuit of a microgrid battery energy storage comprehensive device. Background Art

[0002] The main function of battery energy storage equipment is to use batteries as the main body to store electricity when the grid has abundant or surplus electricity and to release electricity when the grid is short of electricity, that is, to smooth the peaks and fill the valleys of the grid electricity. It is widely used in wind power, solar power stations and electricity consumption scenarios with large peak and valley differences. It is a new energy industry that is an important part of the new power system.

[0003] Microgrid battery energy storage equipment generally takes the form of a cabinet with a power of hundreds of kilowatts and stored electricity of hundreds of kilowatt-hours (degrees). It is a small and medium-sized energy storage device suitable for power regulation of industrial and commercial power users and public distribution stations.

[0004] In addition to batteries for storing electric energy, microgrid battery energy storage equipment also includes PCS devices for bidirectional conversion systems that convert AC power from the grid into DC power and DC power from batteries into AC power, BMS devices for safe and economical operation management of energy storage batteries, FMS devices for reliable operation management of energy storage batteries and fire protection in cabinets, PMS devices for safe and reliable operation management of equipment AC distribution power supply and DC working power supply, and EMS devices for safe and economical operation management of energy storage battery charging and discharging, equipment storage and generation, and distribution and supply. BMS, FMS, PMS, EMS devices and the controller PCS (C) in PCS belong to low voltage (micro voltage) and small current (micro current) secondary circuits, and their components account for more than 95% of the total number of components, with a small part in the interface device attached to the primary circuit.

[0005] The PCS, BMS, FMS, PMS, and EMS in existing microgrid battery energy storage devices are all independently dispersed, or only partially combined, resulting in a complex internal structure of the microgrid battery energy storage device, difficulty in manufacturing and maintenance, poor reliability, and high cost.

[0006] Due to the complexity of the secondary circuits of PCS, BMS, FMS, PMS, and EMS (also known as 5S) in microgrid battery energy storage equipment's dependence on the primary circuits of large volume, heavy weight, high voltage, high current, high temperature rise, and large electromagnetic interference, and their sensitivity to temperature and electromagnetic compatibility, there is currently no integrated device for microgrid battery energy storage equipment PCS, BMS, FMS, PMS, and EMS (5S). Summary of the invention

[0007] The purpose of the present invention is to provide a method for separating the secondary circuit in the PCS and modularizing the secondary circuit, so as to realize the installation and connection structure of the secondary circuit of the integrated device of the microgrid battery energy storage equipment including the PCS, BMS, FMS, PMS and EMS of the microgrid battery energy storage equipment.

[0008] The technical solution of the present invention is: A secondary circuit installation and connection structure of a microgrid battery energy storage integrated device, characterized in that it comprises: a steel frame, which is welded by a front plate, a rear plate, a right plate, a left plate, a right partition plate, and a left partition plate; the right partition plate and the left partition plate divide the frame longitudinally into an AC box, a converter box, and a DC box; the converter box has a middle partition plate, which is shorter and welded to the rear plate, and the middle partition plate divides the converter box into a converter upper chamber, a converter lower chamber, and a converter front chamber; the frame has an upper cover plate and a lower cover plate; There are flat box-type modular PCS secondary circuit boxes, BMS secondary circuit boxes, FMS secondary circuit boxes, PMS secondary circuit boxes, EMS secondary circuit boxes, AC / DC direct current working power supply boxes, and DC / DC direct current working power supply boxes made of metal; the PMS secondary circuit box is installed on the side of the AC box and fixed on the right side panel or right partition, the EMS secondary circuit box is installed on the side of the AC box and fixed on the right partition or right side panel, the BMS secondary circuit box is installed on the side of the DC box and fixed on the left side panel or left partition, the FMS secondary circuit box is installed on the side of the DC box and fixed on the left side panel or left partition, the PCS secondary circuit box is flat-mounted in the front lower part of the front room in the converter box, the AC / DC direct current working power supply box is installed on the side of the AC box and fixed on the right side panel or right partition, the DC / DC direct current working power supply box is installed on the side of the DC box and fixed on the left side panel or left partition, or is installed in the AC box and fixed on the right side panel or right partition.

[0009] There is a secondary circuit bus board, which is located in the lower part before the front board and spans the AC box, converter box, and DC box; there are no less than 15 external connection terminals on the outside of the secondary circuit bus board; there are bus board PCS connectors, bus board BMS connectors, bus board FMS connectors, bus board PMS connectors, and bus board EMS connectors on the inside of the secondary circuit bus board; there are PCS box terminals on the PCS secondary circuit box, BMS box terminals on the BMS secondary circuit box, FMS box terminals on the FMS secondary circuit box, PMS box terminals on the PMS secondary circuit box, and EMS box terminals on the EMS secondary circuit box. There are EMS box terminals, AC / DC box terminals on the AC / DC power supply box, and DC / DC box terminals on the DC / DC power supply box; the PCS box terminals, BMS box terminals, FMS box terminals, PMS box terminals, and EMS box terminals are respectively connected with the bus board PCS connector, bus board BMS connector, bus board FMS connector, bus board PMS connector, and bus board EMS connector on the secondary circuit bus board by cables, and the AC / DC box terminals and DC / DC box terminals are connected with the PMS box terminals; the external terminals are connected with relevant terminals of external devices.

[0010] The AC box contains a primary AC circuit composed of interconnected AC primary components, the primary AC circuit contains AC input terminals, AC circuit breakers, and AC fuses, the PMS box terminals on the PMS secondary circuit box and the AC / DC box terminals on the AC / DC power supply box have wires or cables connected to the primary AC circuit or to the AC interface on the primary AC circuit, the primary AC circuit is connected to the distribution grid, the PMS secondary circuit box manages power supply safety and reliable operation by collecting parameters of the primary AC circuit, and the AC / DC working power supply obtains input energy from the primary AC circuit; the converter box contains a primary converter circuit composed of interconnected converter primary components, the primary converter circuit contains filter reactor components, energy storage capacitor components, and IGBT components, the PCS box terminals on the PCS secondary circuit box have wires or cables connected to the primary converter circuit or to the converter on the primary converter circuit The PMS secondary circuit box is connected to the interface, and the PMS secondary circuit box realizes the conversion of distribution AC power into DC power that can be stored in the battery and the conversion of battery DC power into AC power that can be injected into the distribution AC power grid by collecting parameters of the primary converter circuit and controlling the operating conditions; the DC box has a primary DC circuit composed of DC primary components connected to each other, and the primary DC circuit has DC access terminals, DC circuit breakers, DC fuses, and DC relays. The BMS box terminals on the BMS secondary circuit box and the DC / DC box terminals on the DC / DC working power supply box are connected to the primary DC circuit or to the DC interface on the primary DC circuit with wires or cables. The primary DC circuit is connected to the energy storage battery. The BMS secondary circuit box realizes safe and economical operation management of the energy storage battery and the DC / DC working power supply box obtains input energy from the primary DC circuit by collecting parameters of the primary DC circuit and controlling the operating conditions.

[0011] A fire-fighting liquid storage tank is installed in the DC box. A liquid spray connecting nozzle is installed on the upper front part of the left side panel of the DC box. There is a liquid spray nozzle at one end of the fire-fighting liquid storage tank and a liquid storage tank wiring at the other end. A liquid guide tube connects the liquid spray nozzle and one end of the liquid spray connecting nozzle. The liquid storage tank wiring is connected to the FMS box wiring terminal. When the FMS secondary circuit box receives fire accident information, the liquid storage tank is started through the FMS box wiring terminal and the liquid storage tank wiring to spray the fire-fighting liquid from the liquid spray nozzle through the liquid spray connecting nozzle.

[0012] The present invention adopts effective measures in the chassis structure of the device, separating the secondary circuit in the PCS, modularizing the secondary circuit, and busing the interconnections, etc., to realize the integration of PCS, BMS, FMS, PMS, and EMS (5S) of the microgrid battery energy storage equipment. The formed 5S integrated device of the microgrid battery energy storage equipment has a simple and reasonable structure, low cost, and reliable operation. After being used in the microgrid battery energy storage equipment, the device has a simple structure, reliable operation, and simple production, manufacturing, operation and maintenance, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a front plan view of an embodiment of the present invention.

[0015] Figure 2 It is a bottom view of one embodiment of the present invention.

[0016] Figure 3 yes Figure 1 AA view of the .

[0017] Reference numerals: 001—Frame 002—Front panel 003—Rear Panel 004—Right side panel 005—Left side panel 006—Right bulkhead 007—Left bulkhead 008—Middle partition 009—Upper cover 010—Lower cover 012—AC box 013—Converter Box 014—DC box 015—Voltage upper chamber 016—Variable flow chamber 017—Flow conversion chamber 018—PCS secondary circuit box 019—BMS secondary circuit box 020—FMS secondary circuit box 021—PMS secondary circuit box 022—EMS secondary circuit box 023—AC / DC working power supply box 024—DC / DC working power supply box 025—Secondary circuit bus board 026—External terminal 027—Bus board PCS connector 028—Bus board BMS connector 029—Bus board FMS connector 030—Bus board PMS connector 031—Bus board EMS connector 034—PCS box terminal 035—BMS box terminal 036—FMS box terminal 037—PMS box terminal 038—EMS box terminal 039—AC / DC box terminal 040—DC / DC box terminal 101—Primary AC Circuit 102—AC input terminal 103—AC circuit breaker 104—AC fuse 105—AC interface 201—Primary Converter Circuit 202—Filter Reactor Components 203—Energy storage capacitor assembly 204—IGBT components 205—Converter Interface 301—Primary DC Circuit 303—DC access terminal 304—DC circuit breaker 305—DC fuse 306—DC relay 307—DC interface 401—Fire-fighting liquid storage tank 402—Spray connection nozzle 403—Spray Nozzle 404—Liquid storage tank wiring DETAILED DESCRIPTION

[0018] A secondary circuit installation and connection structure of a microgrid battery energy storage integrated device, comprising: a steel frame 001, the frame 001 is welded by a front plate 002, a rear panel 003, a right side panel 004, a left side panel 005, a right partition 006, and a left partition 007; the right partition 006 and the left partition 007 divide the frame 001 into an AC box 012, a converter box 013, and a DC box 014 in the longitudinal direction; there is a middle partition 008 in the converter box 031, the middle partition 008 is shorter and welded to the rear panel 003, and the middle partition 008 is welded to the rear panel 003. Partition 008 divides converter box 013 into converter upper chamber 015, converter lower chamber 016 and converter front chamber 017; frame 001 has upper cover 009 and lower cover 010; the device is divided into three boxes and three chambers according to the primary and secondary devices and circuits in the 5S integrated device and their temperature, electromagnetic compatibility and other characteristics, so that the device structure is clear and conducive to assembly, debugging and maintenance; the right partition 006, left partition 007 and middle partition 008 are not only used for space division and installation of devices and components, but also have the effects of heat insulation and electromagnetic interference isolation.

[0019] There are metal flat box-type modular PCS secondary circuit box 018, BMS secondary circuit box 019, FMS secondary circuit box 020, PMS secondary circuit box 021, EMS secondary circuit box 022, AC / DC direct current working power supply box 023, DC / DC direct current working power supply box 024; PMS secondary circuit box 021 is installed on the side of AC box 012 and fixed on the right side plate 004 or right partition 006, EMS secondary circuit box 022 is installed on the side of AC box 012 and fixed on the right partition 006 or right side plate 004, BMS secondary circuit box 019 is installed on the side of DC box 014 It is fixed on the left side plate 005 or the left partition 007. The FMS secondary circuit box 020 is installed on the side of the DC box 014 and fixed on the left side plate 005 or the left partition 007. The PCS secondary circuit box 018 is flatly installed in the front lower part of the front chamber of the converter box 013. The AC / DC working power supply box 023 is installed on the side of the AC box 012 and fixed on the right side plate 004 or the right partition 006. The DC / DC working power supply box 024 is installed on the side of the DC box 014 and fixed on the left side plate 005 or the left partition 007 or is installed in the AC box 012 and fixed on the right side plate 004 or the right partition 006. PCS, BMS, FMS, PMS, EMS secondary circuits and AC / DC, DC / DC direct current working power supplies are all installed in metal, flat box-shaped, modular (can be independently tested, installed, maintained, and replaced) boxes to improve electromagnetic compatibility and thermal insulation, and are also convenient for side installation to reduce space and fix with partitions to facilitate heat dissipation. The installation position is close to the primary circuit to which it is attached, shortening the connecting wires, improving electromagnetic compatibility and reducing costs. Modularity is conducive to operation, maintenance, loading, unloading and replacement.

[0020] There is a secondary circuit bus board 025, which is located at the lower part before the front board 002 and spans across the AC box 012, the converter box 013, and the DC box 014; there are no less than 15 external connection terminals 026 on the outside of the secondary circuit bus board 025; there are bus board PCS connectors 027, bus board BMS connectors 028, bus board FMS connectors 029, bus board PMS connectors 030, and bus board EMS connectors 031 on the inside of the secondary circuit bus board 025; there are PCS box connection terminals 034 on the PCS secondary circuit box 018, BMS box connection terminals 035 on the BMS secondary circuit box 019, FMS box connection terminals 036 on the FMS secondary circuit box 020, PMS box connection terminals 037 on the PMS secondary circuit box 021, and EMS secondary circuit connection terminals 038 on the EMS secondary circuit box 039; There is an EMS box terminal 038 on box 022, an AC / DC box terminal 039 on AC / DC power supply box 023, and a DC / DC box terminal 040 on DC / DC power supply box 024; PCS box terminal 034, BMS box terminal 035, FMS box terminal 036, PMS box terminal 037, and EMS box terminal 038 are respectively connected by cables to bus board PCS connector 027, bus board BMS connector 028, bus board FMS connector 029, bus board PMS connector 030, and bus board EMS connector 031 on secondary circuit bus board 025, and AC / DC box terminal 039 and DC / DC box terminal 040 are connected to PMS box terminal 037; external terminal 026 is connected to relevant terminals of external equipment. The main connections between the PCS, BMS, FMS, PMS, and EMS secondary circuit boxes 018, 019, 020, 021, and 022 are information exchange and DC working power sharing. Information adopts bus communication mode, and uses a secondary circuit bus board 025 with a communication bus and a DC working power line and a plug-in connection method, which greatly simplifies the connection lines and facilitates production, assembly, debugging, and replacement. At the same time, the bus method improves electromagnetic compatibility.

[0021] The AC box 012 has a primary AC circuit 101 formed by interconnecting AC primary components. The primary AC circuit 101 has an AC input terminal 102, an AC circuit breaker 103, and an AC fuse 104. The PMS box terminal 037 on the PMS secondary circuit box 021 and the AC / DC box terminal 039 on the AC / DC power supply box 023 have wires or cables connected to the primary AC circuit 101 or connected to the AC interface 105 on the primary AC circuit 101. The primary AC circuit is connected to the power distribution grid. The PMS secondary circuit The box 021 manages the safe and reliable operation of the power supply by collecting parameters of the primary AC circuit 101, and the AC / DC working power supply box 023 obtains input energy from the primary AC circuit; the converter box 013 has a primary converter circuit 201 composed of converter primary components connected to each other, and the primary converter circuit 201 has a filter reactor component 202, a storage capacitor component 203, and an IGBT component 204. The PCS box terminal 034 on the PCS secondary circuit box 018 has a wire or cable connected to the primary converter circuit 201 or to the primary converter circuit. The PCS secondary circuit box 018 realizes the conversion of the distribution AC power into the DC power that can be stored in the battery and the conversion of the battery DC power into the AC power that can be injected into the distribution AC grid by collecting the parameters of the primary conversion circuit 201 and controlling the operating conditions; the DC box 014 has a primary DC circuit 301 composed of DC primary components connected to each other, and the primary DC circuit 301 has a DC access terminal 303, a DC circuit breaker 304, a DC fuse 305, and a DC relay 306, and the BMS secondary circuit The BMS box terminal 035 on the circuit box 019 and the DC / DC box terminal 040 on the DC / DC working power supply box 024 are connected to the primary DC circuit 301 or to the DC interface 307 on the primary DC circuit 301 by wires or cables. The primary DC circuit 301 is connected to the energy storage battery. The BMS secondary circuit box 019 realizes safe and economical operation management of the energy storage battery and the DC / DC working power supply box 024 obtains input energy from the primary DC circuit by collecting parameters of the primary DC circuit 301 and controlling the operating conditions.

[0022] The DC box 014 is equipped with a fire-fighting liquid storage tank 401, and a liquid spray connection nozzle 402 is installed on the front upper part of the left side plate 005 of the DC box 014. The fire-fighting liquid storage tank 401 has a liquid spray nozzle 403 at one end and a liquid storage tank connection 404 at the other end; a liquid guide tube connects the liquid spray nozzle 403 with one end of the liquid spray connection nozzle 402; and the liquid storage tank connection 404 is connected to the FMS box terminal 038. When the FMS secondary circuit box 020 receives fire accident information, the liquid storage tank 401 is activated through the FMS box terminal 038 and the liquid storage tank connection 404 to spray the fire-fighting liquid from the liquid spray nozzle 403 through the liquid spray connection nozzle 402.

Claims

1. An installation and connection structure for a secondary circuit of a microgrid battery energy storage integrated device, characterized by comprising: A steel machine frame (001), the machine frame (001) is welded together by a front plate (002), a rear panel (003), a right side plate (004), a left side plate (005), a right partition plate (006), and a left partition plate (007); the right partition plate (006) and the left partition plate (007) divide the machine frame (001) longitudinally into an AC box (012), a converter box (013), and a DC box (014); the converter box (031) has a middle partition plate (008), the middle partition plate (008) is shorter and is welded to the rear panel (003), and the middle partition plate (008) divides the converter box (013) into a converter upper chamber (015), a converter lower chamber (016), and a converter front chamber (017); the machine frame (001) has an upper cover plate (009) and a lower cover plate (010); There are flat box-type modular PCS secondary circuit boxes (018), BMS secondary circuit boxes (019), FMS secondary circuit boxes (020), PMS secondary circuit boxes (021), EMS secondary circuit boxes (022), AC / DC direct current working power supply boxes (023), and DC / DC direct current working power supply boxes (024) made of metal; the PMS secondary circuit box (021) is installed on the side of the AC box (012) and fixed on the right side plate (004) or the right partition (006); the EMS secondary circuit box (022) is installed on the side of the AC box (012) and fixed on the right partition (006) or the right side plate (004); the BMS secondary circuit box (019) is installed on the side of the DC box (014) and fixed The FMS secondary circuit box (020) is installed on the side of the DC box (014) and fixed on the left side plate (005) or the left partition (007). The PCS secondary circuit box (018) is installed flat on the front lower part of the front room of the converter box (013). The AC / DC working power supply box (023) is installed on the side of the AC box (012) and fixed on the right side plate (004) or the right partition (006). The DC / DC working power supply box (024) is installed on the side of the DC box (014) and fixed on the left side plate (005) or the left partition (007) or is installed in the AC box (012) and fixed on the right side plate (004) or the right partition (006).

2. The installation and connection structure of the secondary circuit of the microgrid battery energy storage integrated device according to claim 1 is characterized by: There is a secondary circuit bus board (025), the secondary circuit bus board (025) is located at the lower part before the front board (002) and spans the AC box (012), the converter box (013), and the DC box (014); the outer side of the secondary circuit bus board (025) has no less than 15 external connection terminals (026); the inner side of the secondary circuit bus board (025) has a bus board PCS connector (027), a bus board BMS connector (028), a bus board FMS connector (029), a bus board PMS connector (030), and a bus board EMS connector (031); the PCS secondary circuit box (018) has a PCS box connection terminal (034), the BMS secondary circuit box (019) has a BMS box connection terminal (035), the FMS secondary circuit box (020) has an FMS box connection terminal (036), the PMS secondary circuit box (021) has a PMS box connection terminal (037), and the EMS secondary circuit box (031) has a PMS box connection terminal (038). The circuit box (022) has an EMS box terminal (038), the AC / DC box terminal (039) is on the AC / DC power supply box (023), and the DC / DC box terminal (040) is on the DC / DC power supply box (024); the PCS box terminal (034), the BMS box terminal (035), the FMS box terminal (036), the PMS box terminal (037), and the EMS box terminal (038) are respectively connected by cables to the bus board PCS connector (027), the bus board BMS connector (028), the bus board FMS connector (029), the bus board PMS connector (030), and the bus board EMS connector (031) on the secondary circuit bus board (025); the AC / DC box terminal (039) and the DC / DC box terminal (040) are connected to the PMS box terminal (037); and the external terminal (026) is connected to the relevant terminal of the external device.

3. The installation and connection structure of the secondary circuit of the microgrid battery energy storage integrated device according to claim 1 is characterized by: The AC box (012) contains a primary AC circuit (101) composed of AC primary components connected to each other. The primary AC circuit (101) contains an AC input terminal (102), an AC circuit breaker (103), and an AC fuse (104). A PMS box terminal (037) on the PMS secondary circuit box (021) and an AC / DC box terminal (039) on the AC / DC power supply box (023) are connected to the primary AC circuit (101) or to an AC interface (105) on the primary AC circuit (101) by wires or cables. The primary AC circuit is connected to a power distribution grid. The PMS secondary circuit box (021) contains a PMS box terminal (037) and an AC / DC box terminal (039) on the AC / DC power supply box (023). The secondary circuit box (021) manages power supply safety and reliable operation by collecting parameters of the primary AC circuit (101), and the AC / DC working power supply box (023) obtains input energy from the primary AC circuit; the converter box (013) has a primary converter circuit (201) composed of converter primary element components connected to each other, the primary converter circuit (201) has a filter reactor component (202), an energy storage capacitor component (203), and an IGBT component (204), and the PCS box connection terminal (034) on the PCS secondary circuit box (018) has a wire or cable connected to the primary converter circuit (201) or to the primary The PCS secondary circuit box (018) is connected to the converter interface (205) on the converter circuit (201), and the PCS secondary circuit box (018) realizes the conversion of the distribution AC power into DC power that can be stored in the battery and the conversion of the battery DC power into AC power that can be injected into the distribution AC grid by collecting parameters of the primary converter circuit (201) and controlling the operating conditions; the DC box (014) has a primary DC circuit (301) composed of DC primary components connected to each other, and the primary DC circuit (301) has a DC access terminal (303), a DC circuit breaker (304), a DC fuse (305), and a DC relay (306), and the BMS secondary The BMS box terminal (035) on the circuit box (019) and the DC / DC box terminal (040) on the DC / DC working power supply box (024) are connected to the primary DC circuit (301) or to the DC interface (307) on the primary DC circuit (301) by wires or cables. The primary DC circuit (301) is connected to the energy storage battery. The BMS secondary circuit box (019) realizes safe and economical operation management of the energy storage battery and the DC / DC working power supply box (024) obtains input energy from the primary DC circuit by collecting parameters of the primary DC circuit (301) and controlling the operating conditions.

4. The installation and connection structure of the secondary circuit of the microgrid battery energy storage integrated device according to claim 1 is characterized by: A fire-fighting liquid storage tank (401) is installed in the DC box (014), and a liquid spray connection nozzle (402) is installed on the front upper part of the left side plate (005) of the DC box (014). A liquid spray nozzle (403) is provided at one end of the fire-fighting liquid storage tank (401), and a liquid storage tank wiring (404) is provided at the other end; a liquid guide tube is provided to connect the liquid spray nozzle (403) and one end of the liquid spray connection nozzle (402); the liquid storage tank wiring (404) is connected to the FMS box wiring terminal (038); when the FMS secondary circuit box (020) receives fire-fighting accident information, the liquid storage tank (401) is activated through the FMS box wiring terminal (038) and the liquid storage tank wiring (404) to spray the fire-fighting liquid from the liquid spray nozzle (403) through the liquid spray connection nozzle (402).

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