Pump set type perfluorohexanone fire extinguishing device for lithium battery energy storage cabin

Abstract

The utility model relates to a lithium battery energy storage cabin pump set type perfluorohexanone fire extinguishing device which comprises a lithium battery energy storage cabin and a plurality of battery clusters, the battery clusters are arranged in the lithium battery energy storage cabin in a square shape, the lithium battery energy storage cabin comprises an equipment cabin, a lithium battery cabin and a separating wall, and the lithium battery cabin is separated from the equipment cabin through the separating wall. A plurality of battery clusters are arranged in the lithium battery cabin, pump set type perfluorohexanone fire extinguishing equipment is arranged in the equipment cabin, the pump set type perfluorohexanone fire extinguishing equipment is connected with a perfluorohexanone fine mist fire extinguishing mechanism, and the perfluorohexanone fine mist fire extinguishing mechanism penetrates through the isolation wall and is arranged close to the top face of the lithium battery cabin. And a fire detection mechanism is arranged close to the top surface of the lithium battery cabin. According to the utility model, normal-pressure storage of the perfluorohexanone fire extinguishing agent is realized, the continuous spraying and spot spraying time is accurately controlled, the pressure is high, the flow is constant, and fire protection is carried out on the lithium battery energy storage cabin.

Description

Technical Field

[0001] The utility model relates to the field of fire protection, and in particular to a lithium battery energy storage cabin pump group type perfluorohexanone fire extinguishing device. Background Art

[0002] Lithium battery energy storage cabin is the main equipment of chemical energy storage power station. It is generally built using standard containers, with hundreds of lithium iron phosphate battery modules installed in the box; each battery module is composed of dozens of single batteries; according to the electrical wiring, several battery modules form a battery cluster.

[0003] When the lithium iron phosphate battery in the lithium battery storage compartment is overcharged or overloaded, chemical reactions occur inside the battery and heat is continuously generated. Heat accumulation leads to thermal runaway, causing fire or even explosion, which poses a great fire hazard. Research results show that the fire hazard of lithium iron phosphate batteries is mainly reflected in: a large amount of flammable gas is generated during the thermal runaway process, which poses an explosion risk in the lithium battery storage compartment (confined space); the battery combustion temperature is high, the maximum temperature of the battery module when burning can reach more than 700°C, and the maximum temperature of the cluster-level battery when burning can exceed 1000°C.

[0004] Perfluorohexanone is the most effective fire extinguishing agent for suppressing thermal runaway of lithium batteries. Most of the common lithium battery energy storage cabin fire extinguishing devices on the market currently use perfluorohexanone as a fire extinguishing agent, such as patent number CN202220324986.8, a combined fire extinguishing system for a lithium-ion energy storage power station, and patent number CN202321168849.0, a fire suppression system for an electrochemical energy storage cabin. The perfluorohexanone fire extinguishing agent is stored in a steel cylinder and pressurized with nitrogen. The storage pressure is generally 2.5MPa and 4.2MPa. It is a pressure vessel with certain safety hazards. The steel cylinder needs to be inspected every three years. During the annual inspection, the steel cylinder needs to be removed. If the battery thermal runaway occurs during this period, the fire extinguishing system will not be able to be used. Therefore, in addition to the high annual inspection fee, there are certain safety hazards. For the fire extinguishing system that suppresses thermal runaway of lithium batteries, it is necessary to use program control to control the amount of perfluorohexanone sprayed each time, and to control the spraying time, interval and number of perfluorohexanone. The cylinder pressure is high in the early stage, and the spraying volume is large. In the later stage, the cylinder pressure decreases, the spraying volume is small, and the nozzle flow is unstable. There are also pump group fire extinguishing hosts, such as patent No. 202122145165.6, an automatic fire extinguishing device for energy storage cabinets, which uses an electric diaphragm pump, but does not describe the specific connection method. Since the perfluorohexanone fire extinguishing agent is highly corrosive, corrosion-resistant pump head materials are required. The electric diaphragm pumps on the market with a pressure greater than 2Mpa are all aluminum alloy pump heads, which are not corrosion-resistant; electric diaphragm pumps with a pressure of 2Mpa can be made of polypropylene and nylon. Although they are corrosion-resistant, the pressure is too low and they are not suitable for lithium battery energy storage cabin fire extinguishing systems.

[0005] Therefore, a pump-type perfluorohexanone fire extinguishing equipment is urgently needed to carry out fire protection for the lithium battery energy storage cabin. Summary of the invention

[0006] In order to solve the above problems, the utility model provides a lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device, which is provided with a pump-type perfluorohexanone fire extinguishing device, a perfluorohexanone fine mist fire extinguishing mechanism and a fire detection mechanism, so as to realize the normal pressure storage of perfluorohexanone fire extinguishing agent, realize the precise control of continuous spraying and point spraying spraying time, and realize high pressure and constant flow rate to provide fire protection for the lithium battery energy storage cabin.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device, comprising a lithium battery energy storage cabin, a plurality of battery clusters, and a plurality of the battery clusters are arranged in a square shape in the lithium battery energy storage cabin, the lithium battery energy storage cabin comprises an equipment cabin, a lithium battery cabin and a partition wall, the lithium battery cabin and the equipment cabin are separated by the partition wall, a plurality of battery clusters are arranged in the lithium battery cabin, a pump-type perfluorohexanone fire extinguishing device is arranged in the equipment cabin, the pump-type perfluorohexanone fire extinguishing device is connected to a perfluorohexanone fine mist fire extinguishing mechanism, the perfluorohexanone fine mist fire extinguishing mechanism passes through the partition wall and is arranged near the top surface of the lithium battery cabin, and a fire detection mechanism is also arranged near the top surface of the lithium battery cabin.

[0008] A separation wall is set up to separate the pump-type perfluorohexanone fire extinguishing equipment from the location of the battery cluster to facilitate control by staff. A perfluorohexanone fine mist fire extinguishing mechanism is set up to cover the lithium battery compartment and the position of each battery pack 2 that constitutes the battery cluster, which has a better fire fighting effect. A fire detection mechanism is set up to detect the lithium battery compartment. The combination of the perfluorohexanone fine mist fire extinguishing mechanism and the pump-type perfluorohexanone fire extinguishing equipment provides a hardware basis for realizing automatic fire extinguishing control.

[0009] Furthermore, the pump-type perfluorohexanone fire extinguishing equipment includes a cabinet, a fire alarm controller, a liquid crystal touch screen, a DC motor, a high-pressure plunger pump and a liquid storage tank. The upper end of the cabinet is embedded with a liquid crystal touch screen and a fire alarm controller, the lower end of the cabinet is hinged with a cabinet door, and the interior is a double-layer structure. The lower layer of the cabinet is provided with a DC motor and a high-pressure plunger pump, and the upper layer of the cabinet is provided with a liquid storage tank;

[0010] The high-pressure plunger pump is connected to the output shaft of the DC motor, a pressure sensor is provided at one end of the high-pressure outlet of the high-pressure plunger pump, and a pressure regulating valve is provided at the other end, the pressure regulating valve is provided with a high-pressure hose, and the other end of the high-pressure hose is connected to the perfluorohexanone fine mist fire extinguishing mechanism;

[0011] A breathing valve is arranged at the upper end of the liquid storage tank, a liquid level transmitter is arranged at the side of the liquid storage tank, a liquid outlet solenoid valve is arranged at the bottom of the liquid storage tank, and the liquid outlet solenoid valve is arranged with a low-pressure hose, and the other end of the low-pressure hose is connected to the water inlet of the high-pressure plunger pump.

[0012] The pump-type perfluorohexanone fire extinguishing equipment uses a high-pressure plunger pump for pressurization. When not in operation, the perfluorohexanone fire extinguishing agent is stored in the liquid storage tank at normal pressure. During operation, the high-pressure plunger pump is driven by a DC motor to complete the pressurization of the pump-type perfluorohexanone fire extinguishing equipment. By controlling the output of the DC motor, the continuous spray and spot spray time can be accurately controlled.

[0013] Furthermore, a control cabinet is provided on the upper layer of the cabinet, and a lithium battery is provided on the lower layer of the cabinet. The DC motor, lithium battery, liquid level transmitter, pressure sensor and liquid outlet solenoid valve are connected to the control cabinet through cables and are electrically connected to the fire alarm controller, and the fire alarm controller is electrically connected to the LCD touch operation screen.

[0014] Lithium batteries are set up to power the electrical parts of the pump-type perfluorohexanone fire extinguishing equipment, perfluorohexanone fine mist fire extinguishing mechanism and fire detection mechanism. Liquid level transmitters, pressure sensors and liquid outlet solenoid valves are set up to facilitate the detection of the status of the liquid storage tank and high-pressure plunger pump. The controller and LCD touch screen are set up to provide the hardware basis for automatic fire extinguishing control. The LCD touch screen is set up to facilitate human-computer interaction.

[0015] Furthermore, a base is provided at the bottom of the cabinet, one end of the base is fixed to the cabinet and the other end is fixed to the bottom surface of the equipment compartment;

[0016] The high-pressure rubber hose passes through the upper end surface of the cabinet.

[0017] Furthermore, the perfluorohexanone fine mist fire extinguishing mechanism includes a cluster-level spray main pipe and a cabin-level spray main pipe, the cabin-level spray main pipe is arranged in the middle of the lithium battery compartment, a cabin-level partition valve is arranged at the front end of the cabin-level spray main pipe, the cabin-level spray main pipe is connected to the high-pressure hose through the cabin-level partition valve, and a plurality of cabin-level spray nozzles are arranged in a straight-line equidistant array on the cabin-level spray main pipe, and the cabin-level spray nozzle includes a six-hole structure nozzle;

[0018] The cluster-level spray main pipe is connected to a high-pressure rubber hose, and a plurality of cluster-level partition valves are arranged on the cluster-level spray main pipe corresponding to a plurality of battery clusters, and the cluster-level spray main pipe is connected to a cluster-level spray branch pipe through the cluster-level partition valve;

[0019] A plurality of cluster-level partition valves and cabin-level partition valves are electrically connected to a fire alarm controller.

[0020] Furthermore, the cluster-level spray branch pipe is vertically arranged with the cluster-level spray main pipe and parallel to the battery cluster;

[0021] The battery cluster includes a plurality of battery packs 2 arranged vertically;

[0022] A tee is provided on the cluster-level spray branch pipe corresponding to the positions of multiple batteries pack2, the transverse through hole of the tee is connected to the pack-level spray branch pipe, the pack-level spray branch pipe is connected to the pack-level spray nozzle, the pack-level spray nozzle extends into the interior of the battery pack2, and the pack-level spray nozzle includes a single-nozzle nozzle.

[0023] The relevant pipelines of the cabin-level spray main cover the entire lithium battery cabin for spraying.

[0024] The relevant pipelines of the cluster-level spray main pipe act on the battery pack 2 in a battery cluster respectively.

[0025] Furthermore, the fire detection mechanism includes a cluster-level composite fire detector, a cabin-level composite fire detector, a combustible gas detector, a temperature-sensing fire detector, and a smoke-sensing fire detector;

[0026] The cluster-level composite fire detector is arranged directly above the battery cluster, the cabin-level composite fire detector is arranged in the middle of the top of the lithium battery energy storage cabin, and the number of the combustible gas detector, the temperature fire detector and the smoke fire detector are two, which are arranged on both sides of the lithium battery cabin respectively;

[0027] The output ends of the cluster-level composite fire detector, the cabin-level composite fire detector, the combustible gas detector, the temperature-sensitive fire detector and the smoke-sensitive fire detector are electrically connected to the fire alarm controller.

[0028] Cluster-level composite fire detectors monitor battery clusters, and cabin-level composite fire detectors monitor lithium battery cabins. Combustible gas detectors, temperature fire detectors, and smoke fire detectors are also installed to further improve fire monitoring effects.

[0029] Through the above technical solution, the beneficial effects of the utility model are:

[0030] The utility model adopts a DC motor to drive a high-pressure plunger pump, which is powered by a lithium battery and does not require an external power supply. The high-pressure plunger pump is used for pressurization, and the perfluorohexanone fire extinguishing agent can be stored at normal pressure and does not require annual inspection. The DC motor is easy to control and can achieve continuous spraying and point spraying. The high-pressure plunger pump is used for pressurization, with high pressure and constant flow, and precise flow control can be implemented for each nozzle. When operating, it is combined with a fire detection mechanism to provide a hardware foundation for the implementation of automatic spray fire extinguishing, and the perfluorohexanone fire extinguishing agent is transported to the cabin-level spray nozzles and pack-level spray nozzles for spray fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is one of the structural schematic diagrams of a lithium battery energy storage cabin pump group type perfluorohexanone fire extinguishing device of the utility model;

[0032] Figure 2This is the second structural schematic diagram of a lithium battery energy storage cabin pump group type perfluorohexanone fire extinguishing device of the utility model;

[0033] Figure 3 This is the third structural schematic diagram of a lithium battery energy storage cabin pump group type perfluorohexanone fire extinguishing device of the utility model;

[0034] Figure 4 This is the fourth structural schematic diagram of a lithium battery energy storage cabin pump group type perfluorohexanone fire extinguishing device of the utility model;

[0035] Figure 5 This is the fifth structural schematic diagram of a lithium battery energy storage cabin pump group perfluorohexanone fire extinguishing device of the utility model.

[0036] Figure numbers: 1 is a lithium battery storage compartment, 101 is an equipment compartment, 102 is a lithium battery compartment, 103 is a partition wall, 2 is a battery pack 2, 3 is a battery cluster, 4 is a pump-type perfluorohexanone fire extinguishing device, 401 is a base, 402 is a cabinet, 403 is a cabinet door, 404 is a fire alarm controller, 405 is a liquid crystal operation touch screen, 406 is a DC motor, 407 is a high-pressure plunger pump, 408 is a pressure regulating valve, 409 is a high-pressure hose, 410 is a control cabinet, 411 is a liquid storage tank, 9 is a breathing valve, 10 is a liquid level transmitter, 11 is a liquid outlet solenoid valve, 412 is a lithium battery, 413 is a lithium battery, 3 is a low-pressure hose, 414 is a pressure sensor, 5 is a perfluorohexanone fine mist fire extinguishing mechanism, 501 is a cluster-level spray main pipe, 502 is a cluster-level partition valve, 503 is a cluster-level spray branch pipe, 12 is a three-way pipe, 7 is a pack-level spray branch pipe, 8 is a pack-level spray nozzle, 504 is a cabin-level partition valve, 505 is a cabin-level spray main pipe, 506 is a cabin-level spray nozzle, 6 is a fire detection mechanism, 601 is a cluster-level composite fire detector, 602 is a cabin-level composite fire detector, 603 is a combustible gas fire detector, 604 is a temperature-sensitive fire detector, and 605 is a smoke-sensitive fire detector. DETAILED DESCRIPTION

[0037] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0038] Example 1

[0039] like Figures 1 to 5As shown, a lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device comprises a lithium battery energy storage cabin 1, a plurality of battery clusters 3, and a plurality of the battery clusters 3 are arranged in a square shape in the lithium battery energy storage cabin 1, wherein the lithium battery energy storage cabin 1 comprises an equipment cabin 101, a lithium battery cabin 102 and a partition wall 103, wherein the lithium battery cabin 102 is separated from the equipment cabin 101 by the partition wall 103, a plurality of battery clusters 3 are arranged in the lithium battery cabin 102, a pump-type perfluorohexanone fire extinguishing device 4 is arranged in the equipment cabin 101, the pump-type perfluorohexanone fire extinguishing device 4 is connected to a perfluorohexanone fine mist fire extinguishing mechanism 5, the perfluorohexanone fine mist fire extinguishing mechanism 5 passes through the partition wall 103 and is arranged close to the top surface of the lithium battery cabin 102, and a fire detection mechanism 6 is also arranged close to the top surface of the lithium battery cabin 102.

[0040] Preferably, the pump-type perfluorohexanone fire extinguishing equipment 4 includes a cabinet 402, a fire alarm controller 404, a liquid crystal touch operation screen 405, a DC motor 406, a high-pressure plunger pump 407 and a liquid storage tank 411, wherein the upper end of the cabinet 402 is embedded with a liquid crystal touch operation screen 405 and a fire alarm controller 404, the lower end of the cabinet 402 is hinged with a cabinet door 403, and the interior is a double-layer structure, the lower layer of the cabinet 402 is provided with a DC motor 406 and a high-pressure plunger pump 407, and the upper layer of the cabinet 402 is provided with a liquid storage tank 411;

[0041] The high-pressure plunger pump 407 is connected to the output shaft of the DC motor 406. A pressure sensor 414 is provided at one end of the high-pressure outlet of the high-pressure plunger pump 407, and a pressure regulating valve 408 is provided at the other end. The pressure regulating valve 408 is provided with a high-pressure hose 409, and the other end of the high-pressure hose 409 is connected to the perfluorohexanone fine mist fire extinguishing mechanism 5;

[0042] A breathing valve 9 is provided at the upper end of the liquid storage tank 411, a liquid level transmitter 10 is provided on the side of the liquid storage tank 411, a liquid outlet solenoid valve 11 is provided at the bottom of the liquid storage tank 411, and the liquid outlet solenoid valve 11 is provided with a low-pressure hose 413, and the other end of the low-pressure hose 413 is connected to the water inlet of the high-pressure plunger pump 407.

[0043] In this embodiment, the pump head of the high-pressure plunger pump 407 is made of 304 stainless steel, and the liquid storage tank 411 is made of plastic.

[0044] Preferably, a control cabinet 410 is also provided on the upper layer of the cabinet 402, and a lithium battery 412 is also provided on the lower layer of the cabinet 402. The DC motor 406, lithium battery 412, liquid level transmitter 10, pressure sensor 414 and liquid outlet solenoid valve 11 are connected to the control cabinet 410 through cables, and are electrically connected to the fire alarm controller 404, and the fire alarm controller 404 is electrically connected to the LCD touch operation screen 405.

[0045] Preferably, a base 401 is provided at the bottom of the cabinet 402, one end of the base 401 is fixed to the cabinet 402 and the other end is fixed to the bottom surface of the equipment compartment 101;

[0046] The high-pressure hose 409 passes through the upper end surface of the cabinet 402 .

[0047] Preferably, the perfluorohexanone fine mist fire extinguishing mechanism 5 includes a cluster-level spray main pipe 501 and a cabin-level spray main pipe 505, the cabin-level spray main pipe 505 is arranged in the middle of the lithium battery compartment 102, a cabin-level partition valve 504 is provided at the front end of the cabin-level spray main pipe 505, the cabin-level spray main pipe 505 is connected to the high-pressure hose 409 through the cabin-level partition valve 504, and a plurality of cabin-level spray nozzles 506 are arranged in a straight-line equidistant array on the cabin-level spray main pipe 505, and the cabin-level spray nozzle 506 includes a six-hole structure nozzle;

[0048] The cluster-level spray main pipe 501 is connected to the high-pressure rubber hose 409, and a plurality of cluster-level partition valves 502 are arranged on the cluster-level spray main pipe 501 corresponding to a plurality of battery clusters 3, and the cluster-level spray main pipe 501 is connected to the cluster-level spray branch pipe 503 through the cluster-level partition valve 502;

[0049] The plurality of cluster-level partition valves 502 and cabin-level partition valves 504 are electrically connected to the fire alarm controller 404 .

[0050] Preferably, the cluster-level spray branch pipe 503 is vertically arranged with the cluster-level spray main pipe 501 and parallel to the battery cluster 3;

[0051] The battery cluster 3 includes a plurality of battery packs 2 arranged vertically;

[0052] A tee pipe 12 is provided on the cluster-level spray branch pipe 503 corresponding to the positions of multiple battery pack2, and the transverse through hole of the tee pipe 12 is connected to the pack-level spray branch pipe 7, and the pack-level spray branch pipe 7 is connected to the pack-level spray nozzle 8. The pack-level spray nozzle 8 extends into the interior of the battery pack2, and the pack-level spray nozzle 8 includes a single-nozzle nozzle.

[0053] In this embodiment, the cabin-level partition valve 504 and the cluster-level partition valve 502 are both 304 stainless steel high-pressure solenoid valves, the cluster-level spray main pipe 501 and the cabin-level spray main pipe 505 are made of 304 stainless steel pipes, and the cluster-level spray branch pipe 503 and the pack-level spray branch pipe 7 are flame-retardant pipes.

[0054] Preferably, the fire detection mechanism 6 includes a cluster-level composite fire detector 601, a cabin-level composite fire detector 602, a combustible gas detector 603, a temperature-sensing fire detector 604, and a smoke-sensing fire detector 605;

[0055] The cluster-level composite fire detector 601 is arranged directly above the battery cluster 3, the cabin-level composite fire detector 602 is arranged at the top middle position of the lithium battery 412 energy storage cabin 1, and the number of the combustible gas detector 603, the temperature fire detector 604 and the smoke fire detector 605 are two, which are respectively arranged on both sides of the lithium battery cabin 102;

[0056] The output ends of the cluster-level composite fire detector 601 , the cabin-level composite fire detector 602 , the combustible gas detector 603 , the temperature-sensing fire detector 604 and the smoke-sensing fire detector 605 are electrically connected to the fire alarm controller 404 .

[0057] The fire alarm controller 404 includes a PLC controller.

[0058] The combustible gas detector 603, the temperature fire detector 604 and the smoke fire detector 605 are all explosion-proof.

[0059] During operation, when a battery pack 2 in the lithium battery compartment 102 is in thermal runaway due to overcharge or overdischarge, the temperature of the battery pack 2 rises and releases combustible gas. The cluster-level composite fire detector 601 on the upper end of the battery pack 2 detects it and sends out a warning signal. The fire alarm controller 404 controls the cluster-level partition valve 502 to open, and at the same time, the liquid outlet solenoid valve 11 and the breathing valve 9 are opened, and the DC 406 is powered on. Then the high-pressure plunger pump 407 pressurizes the perfluorohexanone liquid to the high-pressure hose 409, and is transmitted to the thermal runaway battery cluster by the cluster-level spray main pipe 501 and the cluster-level spray branch pipe 503, and then continuously sprays all battery packs 2 by the pack-level spray branch pipe 7 through the pack-level spray nozzle 8. If the cluster-level composite fire detector 601 cannot detect the combustible gas warning signal, the system stops spraying and the fire alarm is cancelled.

[0060] If the battery pack 2 continues to thermally run away and is not effectively controlled, the fire will spread to the adjacent battery cluster 3. The cabin-level composite fire detector 602 detects combustible gas and sends out a warning signal. The fire alarm controller 404 controls the cabin-level partition valve 504 to open, and high-pressure perfluorohexanone liquid enters the cabin-level spray main pipe 505 from the high-pressure hose 409 and is sprayed out by multiple cabin-level spray nozzles 506 to continuously spray and extinguish the fire in the entire lithium battery compartment 102 until the cabin-level composite fire detector 602 and the cluster-level composite fire detector 601 can no longer detect the combustible gas warning signal, the system stops spraying, and the fire alarm is cancelled.

[0061] If the fire is not under control after all the perfluorohexanone fire extinguishing agent in the storage tank is fully discharged, and the cabin-level composite fire detector 602 and the cluster-level composite fire detector 601 still send out warning signals, the fire alarm controller 404 sends out an alarm signal. After the alarm signal is sent out, the fire situation is manually confirmed, and the relevant staff are notified in time to implement manual fire extinguishing.

[0062] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A lithium battery energy storage compartment pump-type perfluorohexanone fire extinguishing device, comprising a lithium battery energy storage compartment (1), a plurality of battery clusters (3), the plurality of battery clusters (3) being arranged in a square shape and arranged in the lithium battery energy storage compartment (1), It is characterized in that The lithium battery energy storage compartment (1) comprises an equipment compartment (101), a lithium battery compartment (102) and a partition wall (103); the lithium battery compartment (102) and the equipment compartment (101) are separated by the partition wall (103); a plurality of battery clusters (3) are arranged in the lithium battery compartment (102); a pump-type perfluorohexanone fire extinguishing device (4) is arranged in the equipment compartment (101); the pump-type perfluorohexanone fire extinguishing device (4) is connected to a perfluorohexanone fine mist fire extinguishing mechanism (5); the perfluorohexanone fine mist fire extinguishing mechanism (5) passes through the partition wall (103) and is arranged close to the top surface of the lithium battery compartment (102); and a fire detection mechanism (6) is also arranged close to the top surface of the lithium battery compartment (102).

2. A lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device according to claim 1, It is characterized in that The pump-type perfluorohexanone fire extinguishing device (4) comprises a cabinet (402), a fire alarm controller (404), a liquid crystal touch operation screen (405), a direct current motor (406), a high-pressure plunger pump (407) and a liquid storage tank (411); the upper end of the cabinet (402) is embedded with a liquid crystal touch operation screen (405) and a fire alarm controller (404); the lower end of the cabinet (402) is hinged with a cabinet door (403), and the interior is a double-layer structure; the lower layer of the cabinet (402) is provided with a direct current motor (406) and a high-pressure plunger pump (407); and the upper layer of the cabinet (402) is provided with a liquid storage tank (411); The high-pressure plunger pump (407) is connected to the output shaft of the DC motor (406); a pressure sensor (414) is provided at one end of the high-pressure outlet of the high-pressure plunger pump (407); a pressure regulating valve (408) is provided at the other end; the pressure regulating valve (408) is provided with a high-pressure hose (409); the other end of the high-pressure hose (409) is connected to the perfluorohexanone fine mist fire extinguishing mechanism (5); A breathing valve (9) is provided at the upper end of the liquid storage tank (411), a liquid level transmitter (10) is provided on the side of the liquid storage tank (411), and a liquid outlet solenoid valve (11) is provided at the bottom of the liquid storage tank (411). The liquid outlet solenoid valve (11) is provided with a low-pressure rubber hose (413), and the other end of the low-pressure rubber hose (413) is connected to the water inlet of the high-pressure plunger pump (407).

3. A lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device according to claim 2, It is characterized in that A control cabinet (410) is also provided on the upper layer of the cabinet (402), and a lithium battery (412) is also provided on the lower layer of the cabinet (402). The DC motor (406), the lithium battery (412), the liquid level transmitter (10), the pressure sensor (414), and the liquid outlet solenoid valve (11) are connected to the control cabinet (410) via cables and are electrically connected to the fire alarm controller (404). The fire alarm controller (404) is electrically connected to the liquid crystal touch operation screen (405).

4. A lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device according to claim 2, It is characterized in that A base (401) is provided at the bottom of the cabinet (402); one end of the base (401) is fixed to the cabinet (402) and the other end is fixed to the bottom surface of the equipment cabin (101); The high-pressure rubber hose (409) passes through the upper end surface of the cabinet (402).

5. A lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device according to claim 2, It is characterized in that The perfluorohexanone fine mist fire extinguishing mechanism (5) comprises a cluster-level spray pipe (501) and a cabin-level spray pipe (505), wherein the cabin-level spray pipe (505) is arranged in the middle of the lithium battery compartment (102), a cabin-level partitioning valve (504) is arranged at the front end of the cabin-level spray pipe (505), the cabin-level spray pipe (505) is connected to the high-pressure rubber hose (409) via the cabin-level partitioning valve (504), and a plurality of cabin-level spray nozzles (506) are arranged in a straight-line equidistant array on the cabin-level spray pipe (505), wherein the cabin-level spray nozzles (506) comprise nozzles with a six-hole structure; The cluster-level spray main pipe (501) is connected to the high-pressure rubber hose (409); a plurality of cluster-level partition valves (502) are provided on the cluster-level spray main pipe (501) corresponding to the plurality of battery clusters (3); and the cluster-level spray main pipe (501) is connected to the cluster-level spray branch pipe (503) via the cluster-level partition valve (502); The plurality of cluster-level partition valves (502) and cabin-level partition valves (504) are electrically connected to the fire alarm controller (404).

6. A lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device according to claim 5, It is characterized in that The cluster-level spray branch pipe (503) is arranged vertically to the cluster-level spray main pipe (501) and is arranged parallel to the battery cluster (3); The battery cluster (3) comprises a plurality of battery packs (2) arranged vertically; A three-way pipe (12) is provided on the cluster-level spray branch pipe (503) corresponding to the positions of the plurality of battery packs (2); a transverse through hole of the three-way pipe (12) is connected to a pack-level spray branch pipe (7); the pack-level spray branch pipe (7) is connected to a pack-level spray nozzle (8); the pack-level spray nozzle (8) extends into the interior of the battery pack (2); and the pack-level spray nozzle (8) includes a single-nozzle nozzle.

7. A lithium battery energy storage cabin pump-type perfluorohexanone fire extinguishing device according to claim 2, It is characterized in that The fire detection mechanism (6) comprises a cluster-level composite fire detector (601), a cabin-level composite fire detector (602), a combustible gas detector (603), a temperature-sensing fire detector (604) and a smoke-sensing fire detector (605); The cluster-level composite fire detector (601) is arranged directly above the battery cluster (3), the cabin-level composite fire detector (602) is arranged at the middle position of the top of the lithium battery (412) energy storage cabin (1), and the number of the combustible gas detector (603), the temperature fire detector (604) and the smoke fire detector (605) are all two, which are respectively arranged on both sides of the lithium battery cabin (102); The output ends of the cluster-level composite fire detector (601), the cabin-level composite fire detector (602), the combustible gas detector (603), the temperature-sensing fire detector (604), and the smoke-sensing fire detector (605) are electrically connected to the fire alarm controller (404).

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