Cabin-level fire protection structure of sodium ion battery for energy storage

Abstract

The utility model relates to the field of electric energy storage fire-fighting control, and discloses a cabin-level fire-fighting protection structure of a sodium ion battery for energy storage, which comprises a frame, a plurality of sealing doors are mounted on two sides of the frame, sealing locks are mounted on the edges of the outer sides of the sealing doors, and electric shutters are fixedly connected to the middles of the sealing doors. A partition plate is fixedly connected to one side of the interior of the frame, a plurality of mounting plates are fixedly connected to the other side of the interior of the frame, a perfluorohexanone fire extinguishing bottle set is fixedly connected between one side of the partition plate and the inner wall of the frame, and a fire control host is arranged on the outer side of the perfluorohexanone fire extinguishing bottle set. According to the utility model, thermal runaway early warning of three-level alarm of the battery pack and two-level alarm of the battery compartment is realized, fire extinguishing full coverage in a whole compartment area is realized by battery compartment level fire fighting, and meanwhile, when thermal runaway is expanded, two-level fire fighting can be jointly started, so that the fire safety protection performance of the battery compartment level is further improved.

Description

Technical Field

[0001] The utility model relates to the field of electric energy storage fire control, in particular to a cabin-level fire protection structure of a sodium ion battery for energy storage. Background Art

[0002] Sodium-ion batteries are a new type of battery different from lithium-ion batteries. Their physical and chemical properties are different from those of lithium-ion batteries. For example, the electrolyte of sodium-ion batteries is sodium hexafluorophosphate. During thermal runaway, the proportion of hydrogen evolution is relatively low, while the amount of carbon monoxide evolution is relatively high. At the same time, the smoke temperature detection threshold is also different from that of lithium-ion batteries. Therefore, the current fire protection strategy and threshold of lithium-ion batteries for energy storage are not applicable to sodium-ion batteries.

[0003] In the field of electric energy storage, sodium-ion batteries still face the risk of thermal runaway after large-scale integration, and a fire protection strategy suitable for the physical and chemical properties of sodium-ion batteries is urgently needed. Therefore, a cabin-level fire protection structure for sodium-ion batteries for energy storage is proposed. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a cabin-level fire protection structure for sodium-ion batteries for energy storage, aiming to improve the problem in the prior art that sodium-ion batteries still face the risk of thermal runaway after large-scale integration.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cabin-level fire protection structure of a sodium ion battery for energy storage, comprising a frame, a plurality of closed doors are installed on both sides of the frame, a closed lock is installed on the outer edge of the closed door, an electric shutter is fixedly connected to the middle of the closed door, a partition is fixedly connected to one side of the interior of the frame, a plurality of mounting plates are fixedly connected to the other side of the interior of the frame, a perfluorohexanone fire extinguishing bottle group is fixedly connected between one side of the partition and the inner wall of the frame, a fire control host is arranged on the outer side of the perfluorohexanone fire extinguishing bottle group, the perfluorohexanone fire extinguishing bottle group and the fire control host are electrically connected, a liquid cooling unit is fixedly connected between the other side of the partition and the inner wall of the frame, a plurality of support plates are fixedly connected to the outer side of the mounting plate from top to bottom in sequence, a battery pack is arranged between the tops of two adjacent support plates, a connecting assembly is installed inside the support plate, a third-level fire fighting assembly is installed inside the battery pack, a second-level fire fighting assembly is installed on the inner top wall of the frame, a fire fighting pipeline is fixedly connected to the middle side of the top of the frame, and a plurality of nozzles are installed on the outer side of the fire fighting pipeline.

[0006] As a further description of the above technical solution:

[0007] The secondary fire protection component includes two temperature detectors, a CO detector, a smoke detector and an H2 detector. The top of the temperature detector is fixedly connected to both sides of the top wall inside the frame, the top of the CO detector is fixedly connected to the side of the top wall inside the frame close to the temperature detector, the top of the smoke detector is fixedly connected to the middle of the top wall inside the frame, and the top of the H detector is fixedly connected to the side of the top wall inside the frame away from the temperature detector. The temperature detector, the CO detector, the smoke detector and the H2 detector are electrically connected to the fire control host respectively.

[0008] As a further description of the above technical solution:

[0009] The three-stage fire-fighting component includes a delivery pipeline, the outer side of the delivery pipeline is installed on the inner wall of the frame, a plurality of nozzles are installed in the middle of the delivery pipeline, one end of the delivery pipeline is connected to the output end of the perfluorohexanone fire extinguisher bottle group, the other end of the delivery pipeline is fixedly connected to a plurality of secondary pipelines, the secondary pipelines are connected to the inside of the battery pack, and three solenoid valves are installed on the outer side of the delivery pipeline.

[0010] As a further description of the above technical solution:

[0011] The solenoid valve is electrically connected to the fire control host.

[0012] As a further description of the above technical solution:

[0013] Liquid cooling pipes are installed on both sides of the battery pack, one of the liquid cooling pipes is connected to the output end of the liquid cooling unit through a hose, and the other liquid cooling pipe is connected to the input end of the liquid cooling unit through a hose.

[0014] As a further description of the above technical solution:

[0015] A high-voltage box is fixedly connected at the bottom between two adjacent mounting plates, and the high-voltage box is electrically connected to the plurality of battery packs.

[0016] As a further description of the above technical solution:

[0017] The connecting assembly includes a mounting frame and a release rod, the top of the mounting frame is fixedly connected to the bottom of the battery pack, the outer periphery of the release rod is slidably connected to the inside of the support plate, a plurality of pull ropes are fixedly connected to the outside of the release rod, one end of the pull rope away from the release rod is fixedly connected to a latch, one end of the latch close to the release rod is fixedly connected to a spring, the side of the spring away from the latch is fixedly connected to a baffle, and the outer side of the baffle is fixedly connected to the inside of the support plate.

[0018] As a further description of the above technical solution:

[0019] One side of the outer periphery of the latch is slidably connected to the inside of the support plate, and the other side of the outer periphery of the latch is inserted into the inside of the mounting frame. The outer periphery of the pull rope passes through the baffle, and a sliding rod is slidably connected to the inside of the release rod, and the sliding rod is fixedly connected to the inner wall of the support plate.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the present invention, in view of the unique physical and chemical characteristics of sodium-ion battery packs in the state of thermal runaway, alarms for three dangerous sources of carbon monoxide, smoke, and high temperature suitable for the power storage compartment level are proposed, and a three-level alarm for the battery pack and a thermal runaway warning for the second-level alarm for the battery compartment are realized. The battery compartment-level fire protection realizes full coverage of fire fighting in the entire cabin area. At the same time, when the thermal runaway expands, the two-level fire protection can be jointly started to further improve the fire safety protection performance of the battery compartment level.

[0022] 2. In the utility model, the mounting frame at the bottom of the sodium-ion battery pack and the latch located inside the support plate are plugged together, and the support plate is synchronously driven by the cooperation of the release rod, spring and pull rope, so that the battery pack and the fire protection cabin can be quickly installed and disassembled, which is convenient for subsequent staff to regularly inspect and maintain the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of a cabin-level fire protection structure of a sodium-ion battery for energy storage proposed by the utility model;

[0024] Figure 2 This is a cross-sectional view of a cabin-level fire protection structure of a sodium ion battery for energy storage proposed by the utility model;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 A schematic diagram of the battery pack structure of a cabin-level fire protection structure of a sodium ion battery for energy storage proposed by the utility model;

[0027] Figure 5 This is a schematic diagram of the mounting frame structure of a cabin-level fire protection structure of a sodium ion battery for energy storage proposed by the utility model;

[0028] Figure 6 The utility model provides a schematic diagram of the internal structure of a support plate of a cabin-level fire protection structure for a sodium-ion battery for energy storage.

[0029] Legend:

[0030] 1. Frame; 2. Closed door; 3. Electric shutter; 4. Closed lock; 5. Partition; 6. Perfluorohexanone fire extinguisher bottle set; 7. Fire control host; 8. Liquid cooling unit; 9. Mounting plate; 10. Support plate; 11. Battery pack; 12. Delivery pipeline; 13. Solenoid valve; 14. Secondary pipeline; 15. High-pressure box; 16. Fire pipeline; 17. Nozzle; 18. Temperature detector; 19. CO detector; 20. Smoke detector; 21. H2 detector; 22. Mounting frame; 23. Release rod; 24. Latch; 25. Spring; 26. Baffle; 27. Pull rope; 28. Slide rod; 29. ​​Liquid cooling pipeline. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1-Figure 2 The utility model provides an embodiment: a cabin-level fire protection structure for a sodium-ion battery for energy storage, including a frame 1. The frame 1 is the main support and installation component of the cabin-level protection mechanism, which can provide effective protection for the internal battery pack 11. At the same time, the top of the frame 1 is provided with densely packed ventilation holes to ensure that the air in the cabin is in a circulating state. A plurality of closed doors 2 are installed on both sides of the frame 1, and a closed lock 4 is installed on the outer edge of the closed door 2. An electric shutter 3 is fixedly connected to the middle of the closed door 2. The closed door 2 can be locked to the inner side of the frame 1 by the closed lock 4. At the same time, the air circulation efficiency in the cabin can be effectively improved by opening the electric shutter 3. A corresponding exhaust system is installed inside the frame 1 to further improve the ventilation efficiency in the cabin. A partition 5 is fixedly connected to one side of the interior of the frame 1, and a plurality of mounting plates 9 are fixedly connected to the other side of the interior of the frame 1. A perfluorohexanone fire extinguisher bottle group 6 is fixedly connected between one side of the partition 5 and the inner wall of the frame 1. A fire control host 7 is arranged on the outside of the perfluorohexanone fire extinguisher bottle group 6. The fire control host 7 is connected to an independent external power supply to ensure that the fire control host 7 can be in operation at all times and control the state in the cabin at all times. At the same time, the perfluorohexanone stored in the perfluorohexanone fire extinguisher bottle group 6 can control and extinguish the fire in the first time when an abnormality occurs in the cabin.

[0033] Reference Figure 2-Figure 4, the perfluorohexanone fire extinguisher bottle group 6 and the fire control host 7 are electrically connected, and the fire control host 7 can issue corresponding execution instructions to the perfluorohexanone fire extinguisher bottle group 6, thereby controlling the perfluorohexanone fire extinguisher bottle group 6 to start discharging perfluorohexanone into the cabin for fire extinguishing protection. A liquid cooling unit 8 is fixedly connected between the other side of the partition 5 and the inner wall of the frame 1, and multiple support plates 10 are fixedly connected to the outside of the mounting plate 9 from top to bottom in sequence. A battery pack 11 is arranged between the tops of two adjacent support plates 10, and a connecting component is installed inside the support plate 10. The battery pack 11 can be conveniently installed on the support plate 10 through the connecting component. At the same time, each group of battery packs 11 is separated by the mounting plate 9 to prevent one group from being isolated by the mounting plate 9 when a fire occurs. A three-level fire-fighting component is installed inside the battery pack 11, and the three-level fire-fighting component can directly spray perfluorohexanone on the designated battery pack 11 to quickly extinguish the open fire caused by overheating of the battery pack 11. A secondary firefighting component is installed on the top wall of the frame 1. The secondary firefighting component can continuously and uninterruptedly check various data inside the frame 1 at all times, and can cooperate with the tertiary firefighting component to fully release perfluorohexanone inside the frame 1. A firefighting pipeline 16 is fixedly connected to the middle side of the top of the frame 1, and multiple nozzles 17 are installed on the outside of the firefighting pipeline 16. When the inside of the frame 1 is completely on fire, the circuit inside the frame 1 will be cut off under the control of the fire control host 7. At the same time, by opening the gate of the firefighting facility, the water flow in the firefighting facility can be connected to the inside of the firefighting pipeline 16 through the pipeline, and then the nozzle 17 will spray water inside the frame 1 to fully suppress the fire. Liquid cooling pipes 29 are installed on both sides of the battery pack 11. One of the liquid cooling pipes 29 is connected to the output end of the liquid cooling unit 8 through a hose, and the other liquid cooling pipe 29 is connected to the input end of the liquid cooling unit 8 through a hose. During the operation of the battery pack 11, the liquid cooling unit 8 will continuously transport the coolant to the liquid cooling pipe 29 on the battery pack 11 through the hose. The coolant passing through the liquid cooling pipe 29 will absorb the heat generated by the battery pack 11 to prevent the battery pack 11 from overheating. A high-voltage box 15 is fixedly connected to the bottom between two adjacent mounting plates 9. The high-voltage box 15 and multiple battery packs 11 are electrically connected. A closed circuit is formed by connecting the high-voltage box 15 and multiple battery packs 11 on top of it in series. The purpose of the series connection between the high-voltage box 15 and the battery pack 11 is mainly to provide the necessary electrical connection and safety protection for charging, discharging and management of the battery pack 11.

[0034] Reference Figure 2The secondary firefighting assembly includes two temperature detectors 18, a CO detector 19, a smoke detector 20 and an H2 detector 21. The top of the temperature detector 18 is fixedly connected to both sides of the top wall of the frame 1, the top of the CO detector 19 is fixedly connected to the side of the top wall of the frame 1 close to the temperature detector 18, the top of the smoke detector 20 is fixedly connected to the middle of the top wall of the frame 1, and the top of the H2 detector 21 is fixedly connected to the side of the top wall of the frame 1 away from the temperature detector 18. The temperature detector 18, CO detector 19, smoke detector 20 and H2 detector 21 are electrically connected to the fire control host 7 respectively. When the detected CO concentration exceeds 400ppm, or the smoke concentration exceeds 0.5dB / m, or the temperature exceeds 65℃, the fire control host 7 will receive the signal and issue a first-level alarm. During the process, the exhaust system in the cabin will be fully opened, and an audible and visual alarm will be issued.

[0035] Reference Figure 2-Figure 4 The three-level fire protection component includes a delivery pipeline 12, the outer side of the delivery pipeline 12 is installed on the inner wall of the frame 1, a plurality of nozzles are installed in the middle of the delivery pipeline 12, one end of the delivery pipeline 12 is connected to the output end of the perfluorohexanone fire extinguishing bottle group 6, and the other end of the delivery pipeline 12 is fixedly connected to a plurality of secondary pipelines 14, which are connected to the inside of the battery pack 11, and three solenoid valves 13 are installed on the outer side of the delivery pipeline 12. The solenoid valve 13 is electrically connected to the fire control host 7. Each battery pack 11 is also installed with a corresponding temperature detector 18, CO detector 19, smoke detector 20 and H2 detector 21. When the battery cell monitoring module detects that the smoke concentration exceeds 0.5dB / m and the temperature exceeds 65°C, or the CO concentration exceeds 500ppm and the smoke concentration exceeds 0.9dB / m, the fire extinguishing system will issue a secondary warning. During the process, the fire control host 7 will cut off the circuit in the cabin. At the same time, on the basis of opening the first-level warning, the fire control host 7 will control the perfluorohexanone fire extinguishing bottle group 6 to open and spray perfluorohexanone through the nozzle on the delivery pipeline 12 inside the frame 1 to deal with the impending fire. When the battery cell monitoring module detects that the smoke concentration exceeds 0.9dB / m and the CO concentration exceeds 600ppm and lasts for more than 10s, or the CO concentration exceeds 600ppm, the smoke concentration exceeds 0.9dB / m and the temperature exceeds 85°C, the fire alarm controller automatically executes the fire extinguishing action and records it, and sends a fire alarm signal to the BMS system. During the process, the solenoid valve 13 on the delivery pipeline 12 will open, so that the perfluorohexanone can be directly sprayed on the corresponding battery pack 11 that has caught fire through the secondary pipeline 14, achieving rapid fire extinguishing.

[0036] Reference Figure 5-Figure 6The connection assembly includes a mounting frame 22 and a release rod 23. The top of the mounting frame 22 is fixedly connected to the bottom of the battery pack 11. The outer periphery of the release rod 23 is slidably connected to the inside of the pallet 10. A plurality of pull ropes 27 are fixedly connected to the outside of the release rod 23. The end of the pull rope 27 away from the release rod 23 is fixedly connected to the latch 24. The end of the latch 24 close to the release rod 23 is fixedly connected to a spring 25. The side of the spring 25 away from the latch 24 is fixedly connected to a baffle 26. The outer side of the baffle 26 is fixedly connected to the inside of the pallet 10. Press the release rod 23 toward the inside of the pallet 10 so that the movement of the release rod 23 drives the pull rope 27 to move. The pull rope 27 pulls the latch 24 completely into the inner wall of the pallet 10, and then waits for the worker to push and completely place the battery pack 11 on the pallet 10. At this time, the worker releases the release rod 23, and the spring 25 compressed by the latch 24 will reset and push the latch 24 outward with the support of the baffle 26, so that the latch 24 will be inserted into the corresponding socket inside the mounting frame 22, and then the mounting frame 22 will be restricted and fixed inside the pallet 10. At this time, the pull rope 27 will also pull the release rod 23 to reset and re-extend from the inside of the pallet 10, so as to facilitate the subsequent disassembly and maintenance of the battery pack 11. One side of the outer periphery of the latch 24 is slidably connected to the inside of the pallet 10, and the other side of the outer periphery of the latch 24 is inserted into the inside of the mounting frame 22, so that the latch 24 can restrict the mounting frame 22 between the two pallets 10, ensuring that the battery pack 11 can be fixed inside the frame 1. The outer periphery of the pull rope 27 passes through the baffle 26, so that the release rod 23 can directly pull the pull rope 27 to drive the latch 24 to move. The release rod 23 is internally slidably connected with a slide bar 28 , which is fixedly connected to the inner wall of the support plate 10 . The release rod 23 can be limited by the slide bar 28 to ensure that the release rod 23 can move stably.

[0037] Working principle: When the temperature detector 18, CO detector 19, smoke detector 20 and H2 detector 21 detect corresponding signals, the signals will be transmitted to the fire control host 7, and then the fire control host 7 will send a signal to control the electric shutter 3 to open, and cooperate with the exhaust system inside the frame 1 to ventilate the inside of the frame 1. At the same time, each battery pack 11 is installed with a corresponding temperature detector 18, CO detector 19, smoke detector 20 and H2 detector 21. The fire control host 7 will also monitor each battery pack 11 synchronously. When the battery pack 11 is overheated, the perfluorohexanone fire extinguisher bottle group 6 starts to spray the perfluorohexanone stored inside from the nozzle inside the delivery pipeline 12. At the same time, the delivery pipeline 12 is distributed inside the frame 1, so that the perfluorohexanone will be sprayed inside the frame 1 as a whole. When the fire is out of control and accompanied by open flames, the fire control host 7 will control the solenoid valve 13 to open, and the perfluorohexanone will be injected into the secondary pipeline 14 along the delivery pipeline 12, and then the secondary pipeline 14 will inject the perfluorohexanone into the battery pack 11, so that the battery pack 11 can be extinguished as soon as possible when it overheats and catches fire.

[0038] When installing the battery pack 11 and the battery pack 11, the worker opens the closed door 2 on the outside of the frame 1 accordingly, and places the battery pack 11 on the corresponding pallet 10. At this time, the worker gently pushes the battery pack 11 on the pallet 10 to move toward the inside of the frame 1. During the process, the release rod 23 is pressed toward the inside of the pallet 10, so that the movement of the release rod 23 will drive the pull rope 27 to move, and the pull rope 27 pulls the pin 24 completely into the inner wall of the pallet 10, and then waits for the worker to push the battery pack 11 and place it completely on the pallet 10. At this time, the worker releases the pressed release rod 23, and the spring 25 compressed by the latch 24 will reset and push the latch 24 outward with the support of the baffle 26, so that the latch 24 will be inserted into the corresponding socket inside the mounting frame 22, and then the mounting frame 22 will be restricted and fixed on the inside of the support plate 10. At this time, the pull rope 27 will also pull the release rod 23 to reset and re-extend it from the inside of the support plate 10, so that subsequent workers can easily press the release rod 23 to disengage the latch 24 from the inside of the mounting frame 22 when maintaining the battery pack 11, and then easily remove the battery pack 11 from the inside of the frame 1.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cabin-level fire protection structure for a sodium ion battery for energy storage, comprising a frame (1), characterized in that: A plurality of closed doors (2) are installed on both sides of the frame (1), a closed lock (4) is installed on the outer edge of the closed door (2), an electric shutter (3) is fixedly connected to the middle of the closed door (2), a partition (5) is fixedly connected to one side of the interior of the frame (1), a plurality of mounting plates (9) are fixedly connected to the other side of the interior of the frame (1), a perfluorohexanone fire extinguisher bottle group (6) is fixedly connected between one side of the partition (5) and the inner wall of the frame (1), a fire control host (7) is arranged on the outer side of the perfluorohexanone fire extinguisher bottle group (6), and the perfluorohexanone fire extinguisher bottle group (6) and the fire control host (7) are connected to each other. The mounting plate (9) is electrically connected to each other, a liquid cooling unit (8) is fixedly connected between the other side of the partition (5) and the inner wall of the frame (1), a plurality of support plates (10) are fixedly connected to the outer side of the mounting plate (9) in sequence from top to bottom, a battery pack (11) is arranged between the tops of two adjacent support plates (10), a connection component is installed inside the support plate (10), a third-level fire-fighting component is installed inside the battery pack (11), a second-level fire-fighting component is installed on the inner top wall of the frame (1), a fire-fighting pipeline (16) is fixedly connected to the middle side of the top of the frame (1), and a plurality of nozzles (17) are installed on the outer side of the fire-fighting pipeline (16).

2. The cabin-level fire protection structure of a sodium ion battery for energy storage according to claim 1, characterized in that: The secondary fire protection component comprises two temperature detectors (18), a CO detector (19), a smoke detector (20) and an H2 detector (21); the top of the temperature detector (18) is fixedly connected to both sides of the inner top wall of the frame (1); the top of the CO detector (19) is fixedly connected to the inner top wall of the frame (1) on a side close to the temperature detector (18); the top of the smoke detector (20) is fixedly connected to the middle of the inner top wall of the frame (1); the top of the H2 detector (21) is fixedly connected to the inner top wall of the frame (1) on a side away from the temperature detector (18); the temperature detector (18), the CO detector (19), the smoke detector (20) and the H2 detector (21) are respectively electrically connected to the fire control host (7).

3. The cabin-level fire protection structure of a sodium ion battery for energy storage according to claim 1 is characterized in that: The three-stage firefighting assembly comprises a delivery pipeline (12), the outer side of the delivery pipeline (12) is mounted on the inner wall of the frame (1), a plurality of nozzles are mounted in the middle of the delivery pipeline (12), one end of the delivery pipeline (12) is connected to the output end of the perfluorohexanone fire extinguisher bottle group (6), the other end of the delivery pipeline (12) is fixedly connected to a plurality of secondary pipelines (14), the secondary pipelines (14) are connected to the inside of the battery pack (11), and three solenoid valves (13) are mounted on the outer side of the delivery pipeline (12).

4. The cabin-level fire protection structure of a sodium ion battery for energy storage according to claim 3 is characterized in that: The solenoid valve (13) is electrically connected to the fire control host (7).

5. The cabin-level fire protection structure of a sodium ion battery for energy storage according to claim 1, characterized in that: Liquid cooling pipes (29) are installed on both sides of the battery pack (11), one of the liquid cooling pipes (29) is connected to the output end of the liquid cooling unit (8) via a hose, and the other of the liquid cooling pipes (29) is connected to the input end of the liquid cooling unit (8) via a hose.

6. The cabin-level fire protection structure of a sodium ion battery for energy storage according to claim 1, characterized in that: A high-voltage box (15) is fixedly connected at the bottom between two adjacent mounting plates (9), and the high-voltage box (15) and the plurality of battery packs (11) are electrically connected.

7. The cabin-level fire protection structure of a sodium ion battery for energy storage according to claim 1 is characterized in that: The connection assembly comprises a mounting frame (22) and a release rod (23), the top of the mounting frame (22) is fixedly connected to the bottom of the battery pack (11), the outer periphery of the release rod (23) is slidably connected to the inside of the support plate (10), a plurality of pull ropes (27) are fixedly connected to the outside of the release rod (23), one end of the pull rope (27) away from the release rod (23) is fixedly connected to a latch (24), one end of the latch (24) close to the release rod (23) is fixedly connected to a spring (25), the side of the spring (25) away from the latch (24) is fixedly connected to a baffle (26), and the outer side of the baffle (26) is fixedly connected to the inside of the support plate (10).

8. The cabin-level fire protection structure of a sodium ion battery for energy storage according to claim 7 is characterized in that: One side of the outer periphery of the latch (24) is slidably connected to the inside of the support plate (10), and the other side of the outer periphery of the latch (24) is inserted into the inside of the mounting frame (22). The outer periphery of the pull rope (27) passes through the baffle (26). The release rod (23) is slidably connected to a slide rod (28), and the slide rod (28) is fixedly connected to the inner wall of the support plate (10).

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