A mine battery module thermal runaway linkage fire extinguishing device

Abstract

The application provides a mine battery module thermal runaway linkage fire extinguishing device, and belongs to the technical field of mine battery safety protection. The device comprises a battery box shell, a supporting mechanism is arranged in the inner cavity of the battery box shell, a plurality of fireproof plates are arranged on the supporting mechanism, battery monomers are arranged between adjacent fireproof plates, shape memory elastic elements are fixedly arranged on the fireproof plates, the shape memory elastic elements penetrate the fireproof plates, the two ends of the shape memory elastic elements between adjacent battery monomers are bonded to the outer side walls of the battery monomers, a fire extinguishing mechanism is arranged on the side wall of one end of the inner cavity of the battery box shell, a pipeline mechanism is arranged at the bottom of the inner cavity of the battery box shell, the output end of the fire extinguishing mechanism is in communication with the input end of the pipeline mechanism, and a connecting mechanism is arranged between the fire extinguishing mechanism and the supporting mechanism. The device adopts a pure mechanical structure to achieve effective transfer, fire extinguishing and heat blocking of the thermal runaway battery monomers, and has high reliability.

Description

Technical Field

[0001] This invention relates to the field of safety protection technology for mining batteries, specifically to a thermal runaway linkage fire extinguishing device for mining battery modules. Background Technology

[0002] Mining batteries, as the core power source underground, pose a significant safety hazard due to thermal runaway, characterized by rapid onset, severe damage, and difficulty in control. A single battery cell can experience thermal runaway, with temperatures exceeding 800°C within 30 seconds, accompanied by the release of large amounts of toxic fumes and flammable gases. The confined space underground accelerates heat accumulation and gas diffusion, easily triggering chain-reaction thermal runaway and personnel poisoning accidents.

[0003] Current mainstream battery thermal runaway protection devices mostly rely on electronic sensors (temperature, gas sensors, etc.) for detection and triggering, which has some inherent defects. Sensors are susceptible to the high humidity (relative humidity ≥90%) and dusty environments underground, leading to component corrosion and failure, and high false alarm and missed alarm rates. Sensors rely on external power supplies, and their protective function is completely lost in the event of power failure or electromagnetic interference. Furthermore, the lack of physical isolation and transfer mechanisms for thermal runaway batteries allows them to continuously heat adjacent batteries, resulting in a high incidence of chain-like thermal runaway and seriously threatening safe production underground. Therefore, we propose a mine-use battery module thermal runaway linkage fire extinguishing device. Summary of the Invention

[0004] This invention provides a thermal runaway linkage fire extinguishing device for mining battery modules to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a thermal runaway linkage fire extinguishing device for mining battery modules, including a battery housing shell. A support mechanism is provided within the inner cavity of the battery housing shell. One end of the support mechanism is fixedly connected to the side wall of the inner cavity of the battery housing shell. Several fireproof plates are provided on the support mechanism, arranged sequentially. A battery cell is positioned between adjacent fireproof plates. Shape memory elastic elements are fixedly mounted on the fireproof plates, penetrating through them. The two ends of the shape memory elastic elements located between adjacent battery cells are bonded to the outer side wall of the battery cell. A fire extinguishing mechanism is provided on the side wall of one end of the inner cavity of the battery housing shell. A pipeline mechanism is provided at the bottom of the inner cavity of the battery housing shell. The output end of the fire extinguishing mechanism is connected to the input end of the pipeline mechanism. A gap is provided between the support mechanism and the fire extinguishing mechanism. A connecting mechanism is provided between the fire extinguishing mechanism and the support mechanism. One end of the connecting mechanism is fixedly connected to the end of the support mechanism near the fire extinguishing mechanism, and the other end of the connecting mechanism is fixedly connected to the fire extinguishing mechanism. One end of the shape memory elastic element on the fireproof plate near the inner cavity side wall of the battery box shell is fixedly connected to the inner cavity side wall of the battery box shell. The other end of the shape memory elastic element on the fireproof plate near the inner cavity side wall of the battery box shell is bonded to the outer side wall of the battery cell. One end of the shape memory elastic element on the fireproof plate near the fire extinguishing mechanism is bonded to the outer side wall of the battery cell. The other end of the shape memory elastic element on the fireproof plate near the fire extinguishing mechanism extends through the fireproof plate in a direction away from the battery cell.

[0007] Furthermore, the support mechanism includes several mounting components, each including an L-shaped plate and a hinge. The L-shaped plate includes a mounting plate and a support plate. One side of the support plate is fixedly connected to the mounting plate. The hinge is fixedly installed on the side of the mounting plate away from the support plate. A support steel plate is provided between adjacent mounting components. One end of the support steel plate is hinged to the hinge, and the other end of the support steel plate is stacked on the upper surface of the support plate. The fireproof plate is fixedly connected to the top of the mounting plate. A guide shaft is installed on the hinge, and sliders are connected to both ends of the guide shaft. A slide rail is fixedly provided on the inner wall of the battery box shell, and the slider is slidably connected to the slide rail.

[0008] Furthermore, the connecting mechanism includes a connecting steel plate and a push rod. The connecting steel plate is fixedly installed at one end of the support mechanism near the fire extinguishing mechanism. One end of the push rod is fixedly connected to the connecting steel plate, and the other end of the push rod is connected to the fire extinguishing mechanism.

[0009] Furthermore, the fire extinguishing mechanism includes a fire extinguishing agent container containing a fire extinguishing agent. The fire extinguishing agent container is fixedly installed on the inner wall of the battery box shell. The output end of the fire extinguishing agent container is connected to a fire extinguishing pipe. The end of the fire extinguishing pipe away from the fire extinguishing agent container is connected to a pipe mechanism. A switch valve is installed on the fire extinguishing pipe. The end of the push rod away from the connecting steel plate is fixedly connected to the switch handle of the switch valve.

[0010] Furthermore, the pipeline mechanism includes several output pipelines, one end of which has an inlet and the other end has an outlet. The output pipelines are arranged in sequence, and adjacent output pipelines are connected to each other through an inlet and an outlet. Each output pipeline has a spring at its bottom, one end of which is fixedly connected to the lower surface of the output pipeline, and the other end of which is fixedly connected to the bottom surface of the inner cavity of the battery box. The output end of the fire extinguishing pipeline is connected to the inlet of the output pipeline at one end of the pipeline mechanism.

[0011] Furthermore, the fireproof board has several mounting holes that penetrate the fireproof board. One end of the shape memory elastic element passes through the mounting holes and is fixedly installed in the mounting holes.

[0012] Furthermore, the shape memory elastic element is a shape memory alloy spring, and the shape memory alloy spring is interference-fitted with the mounting hole.

[0013] Furthermore, the battery cells are connected in series by wires. The battery cells near the inner wall of the battery housing and the battery cells near the fire extinguishing mechanism are connected to power terminals, which extend through the outer wall of the battery housing to the outside.

[0014] The core working principle is as follows: when the shape memory elastic element is heated to the phase change temperature, it elongates and deforms, which can drive the support mechanism to produce sliding displacement, and then trigger the fire extinguishing mechanism to start through the connecting mechanism, so as to realize the automatic detection and linkage fire extinguishing of thermal runaway.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] 1. In this invention, when a single battery cell or multiple battery cells experience thermal runaway, the thermal runaway linkage fire extinguishing device for mining battery modules does not require electrical or electronic components. Driven by the thermal deformation of a shape memory alloy spring, the thermal runaway battery cell can be pushed away from its original installation position, forming a physical isolation from adjacent normal batteries. At the same time, in conjunction with the heat blocking effect of the fireproof plate, the probability of chain thermal runaway is greatly reduced.

[0017] 2. In this invention, the thermal runaway linkage fire extinguishing device for mining battery modules has a compact layout, meeting the requirements of harsh underground working conditions and limited installation space. The number of individual battery cells can be flexibly adjusted to accommodate multiple mining battery modules, offering strong versatility and low maintenance costs. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of a thermal runaway linkage fire extinguishing device for mining battery modules according to an embodiment of the present invention;

[0019] Figure 2 This is a side view schematic diagram of a thermal runaway linkage fire extinguishing device for mining battery modules according to an embodiment of the present invention;

[0020] Figure 3 This is a top view schematic diagram of the thermal runaway linkage fire extinguishing device for mining battery modules according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the support mechanism according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the fireproof board and supporting steel plate according to an embodiment of the present invention. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of the fireproof board and supporting steel plate according to an embodiment of the present invention. Figure 2 ;

[0024] Figure 7 This is a schematic diagram of the supporting steel plate and L-shaped plate according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the fire extinguishing mechanism according to an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the connection mechanism according to an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the pipe mechanism according to an embodiment of the present invention;

[0028] Figure 11 This is a flowchart illustrating the operation of the apparatus according to an embodiment of the present invention.

[0029] In the diagram: 1. Battery housing shell, 2. Fireproof board, 3. Battery cell, 4. Shape memory alloy spring, 5. L-shaped plate, 51. Mounting plate, 52. Support plate, 6. Hinge, 7. Supporting steel plate, 8. Guide shaft, 9. Slide rail, 10. Connecting steel plate, 11. Push rod, 12. Fire extinguishing agent container, 13. Flange, 14. Fire extinguishing pipeline, 15. Switch valve, 16. Switch handle, 17. Output pipeline, 18. Spring, 19. Wire, 20. Power terminal, 21. Support mechanism. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0031] In this article, terms such as "left," "right," "up," "down," "front," and "back" are established based on the positional relationships shown in the attached drawings. Depending on the attached drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection.

[0032] Please see Figures 1 to 11 This embodiment provides a thermal runaway linkage fire extinguishing device for a mining battery module, including a battery housing shell 1. A support mechanism 21 is provided inside the battery housing shell 1. One end of the support mechanism 21 (i.e., the support plate 52 of the rightmost L-shaped plate 5) is fixedly connected to the side wall of the inner cavity of the battery housing shell 1. The support mechanism 21 includes several mounting components arranged sequentially. Each mounting component includes an L-shaped plate 5 and a hinge 6. The L-shaped plate 5 includes a mounting plate 51 (120mm × 50mm) and a support plate 52 (120mm × 50mm). One side of the support plate 52 is fixedly connected to the mounting plate 51. The hinge 6 is fixedly installed on the side of the mounting plate 51 away from the support plate 52. A support steel plate 7 (260mm × 50mm) is provided between adjacent mounting components. One end of the support steel plate 7 is hinged to a hinge 6 (made of stainless steel with rust-proof treatment) with a shaft diameter of 4mm, allowing it to rotate around the hinge 6. The other end of the support steel plate 7 is stacked on the upper surface of the support plate 52. A guide shaft 8 is installed on the hinge 6, and sliders are connected to both ends of the guide shaft 8. A slide rail 9 is fixed on the inner wall of the battery box shell 1. The slider is slidably connected to the slide rail 9, and the slider can move back and forth along the slide rail 9.

[0033] Specifically, the support mechanism 21 is provided with several fireproof plates 2, which are arranged in sequence and fixedly installed on the mounting plate 51. Battery cells 3 are provided between adjacent fireproof plates 2 and placed on the support steel plate 7. In this embodiment, the battery cells 3 are mining lithium iron phosphate batteries (50mm×21mm×70mm per cell, 200Ah capacity). The battery cells 3 are connected in series via wires 19. Power terminals 20 are connected to the battery cells 3 near the inner wall of the battery housing 1 and the battery cells 3 near the fire extinguishing mechanism. The power terminals 20 extend through the shell wall of the battery housing 1 to the outside.

[0034] Specifically, a shape memory elastic element is fixedly installed on the fireproof plate 2, penetrating the fireproof plate 2 and fixedly connected to it. In this embodiment, the shape memory elastic element is a shape memory alloy spring 4, which can elongate by up to 18% (length increases to 14.16mm) after being heated, generating a directional extrusion force ≥80N. The two ends of the shape memory elastic element located between adjacent battery cells 3 are bonded to the outer wall of the battery cell 3 with high-temperature resistant epoxy adhesive (bonding strength ≥6N, moisture resistant). One end of the shape memory elastic element (i.e., the rightmost shape memory alloy spring 4) on the fireproof plate 2 near the inner cavity side wall of the battery box shell 1 is fixedly connected to the inner cavity side wall of the battery box shell 1. The other end of the shape memory elastic element on the fireproof plate 2 near the inner cavity side wall of the battery box shell 1 is bonded to the outer wall of the battery cell 3 through high-temperature resistant epoxy adhesive (bonding strength ≥6N, moisture resistant). One end of the shape memory elastic element (i.e., the leftmost shape memory alloy spring 4) on the fireproof plate 2 near the fire extinguishing mechanism is bonded to the outer wall of the battery cell 3 through high-temperature resistant epoxy adhesive (bonding strength ≥6N, moisture resistant). The other end of the shape memory elastic element on the fireproof plate 2 near the fire extinguishing mechanism extends through the fireproof plate 2 away from the battery cell 3.

[0035] Specifically, the fireproof board 2 has several Φ6mm mounting holes that penetrate the fireproof board 2. One end of the shape memory alloy spring 4 passes through the mounting hole and passes through the fireproof board 2. The shape memory alloy spring 4 is interference-fitted with the mounting hole and is fixedly installed in the mounting hole.

[0036] Specifically, a fire extinguishing mechanism is provided on the side wall of one end of the inner cavity of the battery box shell 1, and a pipeline mechanism is provided at the bottom of the inner cavity of the battery box shell 1. The output end of the fire extinguishing mechanism is connected to the input end of the pipeline mechanism. There is a gap between the support mechanism 21 and the fire extinguishing mechanism. A connecting mechanism is provided between the fire extinguishing mechanism and the support mechanism 21. One end of the connecting mechanism is fixedly connected to the end of the support mechanism 21 near the fire extinguishing mechanism, and the other end of the connecting mechanism is fixedly connected to the fire extinguishing mechanism.

[0037] Specifically, the connecting mechanism includes a connecting steel plate 10 and a push rod 11. The connecting steel plate 10 is fixedly installed on the end of the support mechanism 21 near the fire extinguishing mechanism (i.e., on the mounting plate 51 of the leftmost L-shaped plate 5). One end of the push rod 11 is fixedly connected to the connecting steel plate 10, and the other end of the push rod 11 is connected to the fire extinguishing mechanism.

[0038] Specifically, the fire extinguishing mechanism includes a fire extinguishing agent container 12, which contains fire extinguishing agent. The fire extinguishing agent container 12 is fixedly installed on the inner wall of the battery box housing 1 via a flange 13. The output end of the fire extinguishing agent container 12 is connected to a fire extinguishing pipe 14. The end of the fire extinguishing pipe 14 away from the fire extinguishing agent container 12 is connected to a piping mechanism. A switch valve 15 is installed on the fire extinguishing pipe 14, and the end of the push rod 11 away from the connecting steel plate 10 is fixedly connected to the switch handle 16 of the switch valve 15.

[0039] Specifically, the pipeline mechanism includes several output pipes 17, each with an inlet at one end and an outlet at the other. The output pipes 17 are arranged sequentially, with adjacent output pipes 17 connected to each other via inlets and outlets. Each output pipe 17 has a spring 18 at its bottom, with one end of the spring 18 fixedly connected to the lower surface of the output pipe 17 and the other end of the spring 18 fixedly connected to the bottom surface of the inner cavity of the battery box housing 1. The output end of the fire extinguishing pipe 14 is connected to the inlet of the output pipe 17 at one end of the pipeline mechanism (i.e., the leftmost output pipe 17).

[0040] Specifically, the working process of this invention is as follows: Figure 1 The following example illustrates the thermal runaway of the leftmost battery cell 3. The downhole battery cell 3 experiences thermal runaway due to charging, short circuit, or damage from bumps. The temperature of the thermally runaway battery cell 3 continues to rise, and the heat is transferred to the fireproof plates 2 on both sides and the shape memory alloy springs 4. The shape memory alloy springs 4 elongate when heated. The portion of the shape memory alloy spring 4 closer to the thermally runaway battery cell 3 has a higher temperature and elongates faster when heated, while the portion farther away from the thermally runaway battery cell 3 has a lower temperature and elongates slower when heated. The shape memory alloy spring 4 on the left side of the battery cell 3 pushes the fireproof plate 2 to move towards the fire extinguishing mechanism. The fireproof plate 2 drives the L-shaped plate 5 to move. When the supporting steel plate 7 and the supporting plate 52 separate, the supporting steel plate 7 rotates ≥90° around the hinge 6 under the action of gravity. The battery cell 3 falls onto the output pipe 17 under the action of gravity. Because the battery cell 3 is very heavy, under the weight of the battery cell 3, the output pipe 17 overcomes the elastic force of the spring 18 and moves down 3mm, so that the outlet of the output pipe 17 on the left side opens.

[0041] At the same time, when the fireproof plate 2 moves the L-shaped plate 5, the L-shaped plate 5 moves the connecting steel plate 10, the connecting steel plate 10 moves the push rod 11, the push rod 11 rotates the switch handle 16, the switch valve 15 is opened, and the extinguishing agent in the extinguishing agent container 12 enters the output pipe 17 through the extinguishing pipe 14. The extinguishing agent flows in the output pipe 17 and is sprayed through the outlet onto the surface of the battery cell 3 that has experienced thermal runaway, thus achieving precise fire extinguishing.

[0042] Furthermore, when the battery cell 3 is in normal use, the shape memory alloy springs 4 on both sides are not extended. When the battery cell 3 experiences thermal runaway, the shape memory alloy spring 4 on the right side will push the fireproof plate 2 away from the fire extinguishing mechanism, and the shape memory alloy springs 4 on both sides of the battery cell 3 that has not experienced thermal runaway will be compressed. When the thermally runaway battery cell 3 falls to the bottom of the inner cavity of the battery box shell 1, the compressed shape memory alloy spring 4 will return to its original shape, and the fireproof plate 2 on the right side of the thermally runaway battery cell 3 will move towards the fire extinguishing mechanism, thereby completely sealing the fall opening and blocking the backflow of smoke and the spread of heat.

[0043] Specifically, the degree of sealing of the opening is related to the elasticity of the compressed shape memory alloy spring 4 and the size of the support plate 52. If the shape memory alloy spring 4 is selected properly and the size of the support plate 52 is designed properly, the opening can be completely sealed.

[0044] Specifically, in this invention, when a single battery cell 3 or multiple battery cells 3 experience thermal runaway, the thermal runaway linkage fire extinguishing device for this mining battery module requires no electrical or electronic components. Driven by the thermal deformation of a shape memory alloy spring 4, it pushes the thermally runaway battery cell 3 away from its original installation position, physically isolating it from adjacent normal battery cells 3. Simultaneously, the heat-blocking effect of the fireproof plate 2 significantly reduces the probability of chain-like thermal runaway. This mining battery module thermal runaway linkage fire extinguishing device has a compact layout, meeting the requirements of harsh underground working conditions and limited installation space. The number of battery cells 3 can be flexibly adjusted to accommodate multiple mining battery modules, offering strong versatility and low maintenance costs.

[0045] The above embodiments merely illustrate the basic principles and characteristics of the present invention, but are not limited to the above implementation schemes. It should be understood that those skilled in the art can make various changes and modifications to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mine-used battery module thermal runaway linkage fire extinguishing device, characterized in that, The battery housing includes a battery casing (1), and a support mechanism (21) is provided in the inner cavity of the battery casing (1). One end of the support mechanism (21) is fixedly connected to the side wall of the inner cavity of the battery casing (1). Several fireproof plates (2) are provided on the support mechanism (21). The fireproof plates (2) are arranged in sequence. A battery cell (3) is provided between adjacent fireproof plates (2). A shape memory elastic element is fixedly provided on the fireproof plate (2). The shape memory elastic element penetrates through the fireproof plate (2). The two ends of the shape memory elastic element located between adjacent battery cells (3) are bonded to the outer side wall of the battery cell (3). A fire extinguishing mechanism is provided on the side wall of one end of the inner cavity of the battery casing (1). A pipe mechanism is provided at the bottom of the inner cavity of the battery casing (1). The output end of the fire extinguishing mechanism is connected to the input end of the pipe mechanism. The support mechanism (21) and There is a gap between the fire extinguishing mechanisms. A connecting mechanism is provided between the fire extinguishing mechanism and the supporting mechanism (21). One end of the connecting mechanism is fixedly connected to the end of the supporting mechanism (21) near the fire extinguishing mechanism. The other end of the connecting mechanism is fixedly connected to the fire extinguishing mechanism. One end of the shape memory elastic element on the fireproof plate (2) near the inner cavity side wall of the battery box shell (1) is fixedly connected to the inner cavity side wall of the battery box shell (1). The other end of the shape memory elastic element on the fireproof plate (2) near the inner cavity side wall of the battery box shell (1) is bonded to the outer side wall of the battery cell (3). One end of the shape memory elastic element on the fireproof plate (2) near the fire extinguishing mechanism is bonded to the outer side wall of the battery cell (3). The other end of the shape memory elastic element on the fireproof plate (2) near the fire extinguishing mechanism extends through the fireproof plate (2) away from the battery cell (3). The support mechanism (21) includes several installation components, the installation components include an L-shaped plate (5) and a hinge (6), the L-shaped plate (5) includes an installation plate (51) and a support plate (52), one side of the support plate (52) is fixedly connected to the installation plate (51), the hinge (6) is fixedly installed on the side of the installation plate (51) away from the support plate (52), a support steel plate (7) is provided between adjacent installation components, one end of the support steel plate (7) is hinged to the hinge (6), the other end of the support steel plate (7) is stacked on the upper surface of the support plate (52), the fireproof plate (2) is fixedly connected to the top of the installation plate (51), a guide shaft (8) is installed on the hinge (6), and sliders are connected to both ends of the guide shaft (8), a slide rail (9) is fixedly provided on the inner wall of the battery box shell (1), and the slider is slidably connected to the slide rail (9); The connecting mechanism includes a connecting steel plate (10) and a push rod (11). The connecting steel plate (10) is fixedly installed on the support mechanism (21) at one end near the fire extinguishing mechanism. One end of the push rod (11) is fixedly connected to the connecting steel plate (10), and the other end of the push rod (11) is connected to the fire extinguishing mechanism. The fire extinguishing mechanism includes a fire extinguishing agent container (12), which contains a fire extinguishing agent. The fire extinguishing agent container (12) is fixedly installed on the inner wall of the battery box shell (1). The output end of the fire extinguishing agent container (12) is connected to a fire extinguishing pipe (14). The end of the fire extinguishing pipe (14) away from the fire extinguishing agent container (12) is connected to the pipe mechanism. The pipeline mechanism includes several output pipes (17), one end of which has an inlet and the other end of which has an outlet. The output pipes (17) are arranged in sequence, and adjacent output pipes (17) are connected to each other through the inlet and outlet. Each output pipe (17) has a spring (18) at its bottom. One end of the spring (18) is fixedly connected to the lower surface of the output pipe (17), and the other end of the spring (18) is fixedly connected to the bottom surface of the inner cavity of the battery box shell (1). The output end of the fire extinguishing pipe (14) is connected to the inlet of the output pipe (17) at one end of the pipeline mechanism.

2. The mine battery module thermal runaway linkage fire extinguishing device according to claim 1, characterized in that, A switch valve (15) is installed on the fire extinguishing pipe (14), and the end of the push rod (11) away from the connecting steel plate (10) is fixedly connected to the switch handle (16) of the switch valve (15).

3. The mine battery module thermal runaway linkage fire extinguishing device according to claim 1, characterized in that, The fireproof board (2) has several mounting holes, which penetrate the fireproof board (2). One end of the shape memory elastic element passes through the mounting hole and is fixedly installed in the mounting hole.

4. The mine battery module thermal runaway linkage fire extinguishing device according to claim 1, characterized in that, The shape memory elastic element is a shape memory alloy spring (4), and the shape memory alloy spring (4) is interference-fitted with the mounting hole.

5. The mine battery module thermal runaway linkage fire extinguishing device according to claim 1, characterized in that, The battery cells (3) are connected in series by wires (19). The battery cells (3) near the inner wall of the battery box shell (1) and the battery cells (3) near the fire extinguishing mechanism are connected to power terminals (20). The power terminals (20) extend through the shell wall of the battery box shell (1) to the outside.

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