Grading fire extinguishing system for battery energy storage container

Abstract

The utility model belongs to the technical field of safety protection of energy storage batteries, and particularly relates to a grading fire extinguishing system for a battery energy storage container. Comprising a container, a battery pack storage cabinet arranged in the container, a first-stage fire extinguishing pipeline, a second-stage fire extinguishing pipeline, a first-stage fire extinguishing agent storage tank, a second-stage fire extinguishing agent storage tank, a fire fighting storage tank cabinet, a composite smoke temperature detector, a smoke sensor, a temperature sensor and a PLC. The fire extinguishing system disclosed by the utility model can automatically carry out fire behavior monitoring and graded fire extinguishing operation according to fire behaviors, can carry out precise fire extinguishing on a fire-on energy storage battery in a point-to-point manner, can also carry out covering type strong fire extinguishing after the fire behaviors are enhanced and spread, and can also carry out continuous spraying cooling operation when the fire behaviors cannot be extinguished; time is won for professional fire rescue, and loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage battery safety protection, and specifically relates to a hierarchical fire protection system for a battery energy storage container. Background Art

[0002] Battery energy storage containers are mainly used to store and release electrical energy and are an important supplement to the power system; they can store electrical energy during the low electricity demand period and then release it during the peak electricity demand period, thereby balancing power resources, alleviating grid pressure, and improving the stability and reliability of the power system.

[0003] Existing battery energy storage containers generally use lithium batteries as energy storage batteries. Since lithium salts are self-oxidizing, when lithium batteries catch fire naturally, they burn violently and are difficult to extinguish. Therefore, battery energy storage containers are generally equipped with fire extinguishing systems to deal with natural problems of energy storage batteries.

[0004] Chinese patent CN202322423236.3 discloses a fire-fighting system for an energy storage container. The fire-fighting system uses temperature sensors and smoke sensors to accurately detect the battery cabinets in the energy storage box in real time. When a fire occurs in some battery cabinets, the fire-fighting system can be accurately controlled to extinguish the fire in the battery cabinet; however, the patented technology still has the following defects: although the fire-fighting system can accurately extinguish the battery cabinet on fire and save fire-extinguishing agents, when the fire is too large and spreads to other battery cabinets and ignites, or the fire source cannot be extinguished after the fire-extinguishing agent is consumed, the fire-fighting system cannot cope with a higher level of fire, and cannot execute appropriate fire-fighting strategies according to different fire levels. Utility Model Content

[0005] The purpose of the utility model is to provide a graded fire protection system for a battery energy storage container in view of the problems existing in the prior art.

[0006] The specific technical solution of the utility model is as follows:

[0007] A hierarchical fire protection system for a battery energy storage container, comprising a container, a battery storage cabinet arranged in the container, a primary fire extinguishing pipeline, a secondary fire extinguishing pipeline, a fire storage tank cabinet, a composite smoke and temperature detector, a smoke sensor, a temperature sensor, and a PLC controller;

[0008] The fire-fighting tank cabinet is provided with a primary fire-extinguishing agent tank and a secondary fire-extinguishing agent tank, the primary fire-extinguishing agent tank is provided with a first fire-extinguisher solenoid valve, and the secondary fire-extinguishing agent tank is provided with a second fire-extinguisher solenoid valve;

[0009] A fire extinguishing gas nozzle is provided in the battery storage cabinet, a pipeline solenoid valve is provided on the fire extinguishing gas nozzle, and the composite smoke and temperature detector is located in the battery storage cabinet;

[0010] The inlet of the primary fire extinguishing pipeline is connected to the outlet of the primary fire extinguishing agent storage tank, and the outlet of the primary fire extinguishing pipeline is connected to the inlet of the fire extinguishing gas nozzle;

[0011] The secondary fire extinguishing pipeline is located above the battery storage cabinet, the inlet of the secondary fire extinguishing pipeline is connected to the outlet of the secondary fire extinguishing agent storage tank, and the secondary fire extinguishing pipeline is arranged with secondary fire extinguishing nozzles;

[0012] The smoke sensor and the temperature sensor are arranged on the top of the container;

[0013] The PLC controller is electrically connected to the composite smoke and temperature detector, the smoke sensor, the temperature sensor, the first fire extinguisher solenoid valve, the second fire extinguisher solenoid valve, and the pipeline solenoid valve respectively;

[0014] A smoke exhaust and heat dissipation fan is arranged on the inner wall of the container.

[0015] The hierarchical fire extinguishing system of the utility model also includes a three-stage fire extinguishing pipeline arranged in the container, a fire pipe interface and a sound and light alarm arranged on the outer wall of the container, the three-stage fire extinguishing pipeline is located above the battery storage cabinet, the inlet of the three-stage fire extinguishing pipeline is connected to the fire pipe interface, three-stage fire extinguishing sprinkler heads are arranged on the three-stage fire extinguishing pipeline, and the sound and light alarm is electrically connected to the PLC controller.

[0016] The fire extinguishing gas nozzle includes a delivery main pipe connected to the primary fire extinguishing pipeline and a plurality of delivery branches connected to the lower end of the delivery main pipe; the pipeline solenoid valve is arranged on the delivery main pipe, a fire fighting space is formed between the plurality of delivery branches, and a fire extinguishing gas nozzle is arranged on the delivery branch pipe toward the direction of the fire fighting space.

[0017] The utility model has the following beneficial effects:

[0018] The fire extinguishing system of the present invention can automatically monitor the fire and perform graded fire extinguishing operations according to the fire intensity: it can accurately extinguish the burning energy storage battery point by point, and can also carry out covering-type powerful fire extinguishing after the fire intensifies and spreads. It can also carry out continuous spraying and cooling operations when the fire cannot be extinguished, thereby buying time for professional fire rescue and reducing losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2It is a structural schematic diagram of a primary fire extinguishing agent storage tank in a fire storage tank cabinet of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a secondary fire extinguishing agent storage tank in a fire storage tank cabinet of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the battery storage cabinet of the utility model;

[0023] Figure 5 This is a schematic diagram of a control system of the present utility model. DETAILED DESCRIPTION

[0024] like Figures 1 to 5 As shown, a hierarchical fire protection system for a battery energy storage container includes a container 1, a battery storage cabinet 2 arranged in the container 1, and the fire extinguishing system also includes a primary fire extinguishing pipeline 3, a secondary fire extinguishing pipeline 4, a fire storage tank cabinet 5, a composite smoke and temperature detector 6, a smoke sensor 7, a temperature sensor 8, and a PLC controller 9;

[0025] The fire-fighting tank cabinet 5 is provided with a primary fire-extinguishing agent tank 10 and a secondary fire-extinguishing agent tank 11, the primary fire-extinguishing agent tank 10 is provided with a first fire-extinguishing solenoid valve 12, the secondary fire-extinguishing agent tank 11 is provided with a second fire-extinguishing solenoid valve 13, and the primary fire-extinguishing agent tank 10 and the secondary fire-extinguishing agent tank 11 are loaded with heptafluoropropane gas;

[0026] A fire extinguishing gas nozzle 14 is provided in the battery storage cabinet 2, and a pipeline solenoid valve 15 is provided on the fire extinguishing gas nozzle 14. The composite smoke and temperature detector 6 is located in the battery storage cabinet 2;

[0027] The inlet of the primary fire extinguishing pipeline 3 is connected to the outlet of the primary fire extinguishing agent storage tank 10, and the outlet of the primary fire extinguishing pipeline 3 is connected to the inlet of the fire extinguishing gas nozzle 14;

[0028] The secondary fire extinguishing pipeline 4 is located above the battery storage cabinet 2, the inlet of the secondary fire extinguishing pipeline 4 is connected to the outlet of the secondary fire extinguishing agent storage tank 11, and the secondary fire extinguishing pipeline 4 is arranged with a secondary fire extinguishing nozzle 16;

[0029] The smoke sensor 7 and the temperature sensor 8 are arranged on the top of the container 1;

[0030] A smoke exhaust and heat dissipation fan 20 is provided on the inner wall of the container 1;

[0031] The PLC controller 9 is electrically connected to the composite smoke and temperature detector 6 , the smoke sensor 7 , the temperature sensor 8 , the first fire extinguisher solenoid valve 12 , the second fire extinguisher solenoid valve 13 , and the pipeline solenoid valve 15 , respectively.

[0032] like Figure 1 The battery energy storage container shown also includes a three-stage fire extinguishing pipeline 17 arranged in the container 1, a fire pipe interface 18 and an audible and visual alarm 23 arranged on the outer wall of the container 1, the three-stage fire extinguishing pipeline 17 is located above the battery storage cabinet 2, the inlet of the three-stage fire extinguishing pipeline 17 is connected to the fire pipe interface 18, the three-stage fire extinguishing pipeline 17 is arranged with a three-stage fire extinguishing sprinkler head 21, and the audible and visual alarm 23 is electrically connected to the PLC controller 9.

[0033] like Figure 4 As shown, the fire extinguishing gas nozzle 14 includes a delivery main pipe 14-1 connected to the first-level fire extinguishing pipeline 3, and a plurality of delivery branches 14-2 connected to the lower end of the delivery main pipe 14-1; the pipeline solenoid valve 15 is arranged on the delivery main pipe 14-1, and a fire fighting space 19 is formed between the plurality of delivery branches 14-2, and a fire extinguishing gas nozzle 22 is arranged on the delivery branch pipe 14-2 toward the fire fighting space 19; the fire fighting space 19 accommodates an energy storage battery pack.

[0034] The battery storage container of the utility model has a battery storage cabinet 2 in which a battery pack for power supply is placed; the hierarchical fire extinguishing system of the utility model has a specific working process of fire fighting as follows:

[0035] When the energy storage battery pack in a battery pack storage cabinet 2 of the container 1 burns, the battery pack storage cabinet 2 will heat up in a short time and be filled with smoke. At this time, the composite smoke and temperature detector 6 in the battery pack storage cabinet 2 detects the smoke and high temperature generated by the combustion and sends a signal to the PLC controller 9; the PLC controller 9 controls the first fire extinguisher solenoid valve 12, and the release mechanism of the first fire extinguisher solenoid valve 12 is activated, puncturing the valve sealing mechanism on the primary fire extinguishing agent storage tank 10, and the primary fire extinguishing agent storage tank 10 is filled with heptafluoropropane gas into the primary fire extinguishing pipeline 3. At the same time, the PLC controller 9 controls The pipeline solenoid valve 15 on the fire extinguishing gas nozzle 14 in the battery storage cabinet 2 is started and opened, and the HFC-227ea gas is sprayed into the battery storage cabinet 2 through the first-level fire extinguishing pipeline 3 to the corresponding fire extinguishing gas nozzle 14, so as to accurately extinguish the burning energy storage battery pack; the PLC controller 9 controls the sound and light alarm 23 to start, and sends a fire alarm to the outside world; the fire extinguishing gas nozzle 14 adopts multiple downward delivery branches 14-2 to form a fire fighting space 19 that covers the energy storage battery pack, which can directly spray the energy storage battery pack and extinguish the fire without dead ends, thereby maximizing the fire extinguishing capability.

[0036] When the fire in the battery storage cabinet 2 is strong and the HFC-227ea gas in the primary fire extinguishing agent storage tank 10 is consumed and cannot put out the fire, the fire in the battery storage cabinet 2 extends outward and ignites the energy storage batteries in other battery storage cabinets 2, causing the temperature in the container 1 to rise sharply and the container 1 is also filled with a large amount of smoke; at this time, after the smoke sensor 7 and the temperature sensor 8 sense it, they transmit a signal to the PLC controller 9, and the PLC controller 9 controls the second fire extinguisher solenoid valve 13 to start, and the release mechanism of the second fire extinguisher solenoid valve 13 punctures the valve sealing mechanism on the secondary fire extinguishing agent storage tank 11, and the secondary fire extinguishing agent storage tank 11 fills the secondary fire extinguishing pipeline 4 with HFC-227ea gas, and the HFC-227ea gas is sprayed by the secondary fire extinguishing nozzle 16 to cover all the battery storage cabinets 2 in the container 1 for fire extinguishing; the secondary fire extinguishing agent storage tank 11 can only be started when the smoke sensor 7 and the temperature sensor 8 need to be triggered at the same time.

[0037] When the HFC-227ea gas in the secondary fire extinguishing agent storage tank 11 is exhausted and the fire still cannot be extinguished, the staff will connect the water supply pipe to the fire pipe interface 18, open the water source, and fill the fire water into the tertiary fire extinguishing pipeline 17. The tertiary fire extinguishing sprinkler head 21 will continuously perform cooling spray operations on all battery storage cabinets 2 to minimize the fire, prevent the fire from spreading, and buy time for professional fire rescue.

[0038] The smoke exhaust and heat dissipation fan 20 of the utility model plays the role of cooling and dissipating heat when the battery energy storage container is working normally, and performs smoke exhaust operation during the emptying process.

Claims

1. A hierarchical fire protection system for a battery energy storage container, comprising a container (1), and a battery storage cabinet (2) arranged in the container (1), characterized in that: It also includes a primary fire extinguishing pipeline (3), a secondary fire extinguishing pipeline (4), a fire storage tank cabinet (5), a composite smoke and temperature detector (6), a smoke sensor (7), a temperature sensor (8), and a PLC controller (9); The fire-fighting tank cabinet (5) is provided with a primary fire-extinguishing agent storage tank (10) and a secondary fire-extinguishing agent storage tank (11); the primary fire-extinguishing agent storage tank (10) is provided with a first fire-extinguisher solenoid valve (12); and the secondary fire-extinguishing agent storage tank (11) is provided with a second fire-extinguisher solenoid valve (13); A fire extinguishing gas nozzle (14) is arranged in the battery storage cabinet (2), a pipeline solenoid valve (15) is arranged on the fire extinguishing gas nozzle (14), and the composite smoke and temperature detector (6) is located in the battery storage cabinet (2); The inlet of the primary fire extinguishing pipeline (3) is connected to the outlet of the primary fire extinguishing agent storage tank (10), and the outlet of the primary fire extinguishing pipeline (3) is connected to the inlet of the fire extinguishing gas nozzle (14); The secondary fire extinguishing pipeline (4) is located above the battery storage cabinet (2), the inlet of the secondary fire extinguishing pipeline (4) is connected to the outlet of the secondary fire extinguishing agent storage tank (11), and a secondary fire extinguishing nozzle (16) is arranged on the secondary fire extinguishing pipeline (4); The smoke sensor (7) and the temperature sensor (8) are arranged on the top of the container (1); The PLC controller (9) is electrically connected to the composite smoke and temperature detector (6), the smoke sensor (7), the temperature sensor (8), the first fire extinguisher solenoid valve (12), the second fire extinguisher solenoid valve (13), and the pipeline solenoid valve (15), respectively.

2. A hierarchical fire protection system for a battery energy storage container as claimed in claim 1, characterized in that: It also comprises a three-stage fire extinguishing pipeline (17) arranged in the container (1), a fire pipe interface (18) and an audible and visual alarm (23) arranged on the outer wall of the container (1), the three-stage fire extinguishing pipeline (17) is located above the battery storage cabinet (2), the inlet of the three-stage fire extinguishing pipeline (17) is connected to the fire pipe interface (18), a three-stage fire extinguishing sprinkler head (21) is arranged on the three-stage fire extinguishing pipeline (17), and the audible and visual alarm (23) is electrically connected to the PLC controller (9).

3. A hierarchical fire protection system for a battery energy storage container as claimed in claim 1, characterized in that: The fire extinguishing gas nozzle (14) comprises a main delivery pipe (14-1) connected to the primary fire extinguishing pipeline (3) and a plurality of branch delivery pipes (14-2) connected to the lower end of the main delivery pipe (14-1); the pipeline solenoid valve (15) is arranged on the main delivery pipe (14-1); a fire fighting space (19) is formed between the plurality of branch delivery pipes (14-2); and a fire extinguishing gas nozzle (22) is arranged on the branch delivery pipe (14-2) in a direction toward the fire fighting space (19).

4. A hierarchical fire protection system for a battery energy storage container as claimed in claim 1, characterized in that: A smoke exhaust and heat dissipation fan (20) is arranged on the inner wall of the container (1).

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