Sodium ion battery emergency power supply for coal mine

Abstract

The invention discloses a sodium ion battery emergency power supply for a coal mine, and belongs to the technical field of coal mine underground emergency power supply. Comprising a power box, a sodium ion battery body is installed in the power box, and the top end of the power box is fixedly connected with a methane sensor, a power-off assembly and a temperature sensor; the power-off assembly is used for separating the power connection plate from the sodium ion battery body; a gas chamber is formed in the bottom end of the power supply box, and high-pressure inert gas is stored in the gas chamber; a deflation assembly is arranged at the top of the air chamber; a sealing assembly is arranged in the power box; the methane sensor monitors the concentration of methane outside the power box in real time, the temperature sensor monitors the temperature inside the power box in real time, and when it is monitored that the concentration of methane exceeds the standard or the temperature inside the power box exceeds a threshold value, the power-off assembly, the sealing assembly and the deflation assembly are triggered; according to the invention, a whole-process safety closed loop of monitoring-triggering-protection is constructed, and the problems of fragmentation and response lag of protection of an existing emergency power supply are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coal mine underground emergency power supply, and specifically relates to a sodium ion battery emergency power supply for coal mines. BACKGROUND

[0002] The sodium ion battery emergency power supply for coal mines is an emergency power supply device suitable for the special operation environment of coal mines, which takes a sodium ion battery as a core energy storage unit and integrates power supply, protection and other functions, and is mainly applied to providing temporary stable power support for key loads such as underground ventilation equipment, lighting systems, communication devices, personnel evacuation guiding equipment and the like when the main power supply of coal mines fails or a safety accident occurs, and is an important device for ensuring the continuity of coal mine production, reducing accident losses and protecting the safety of operating personnel. Such an emergency power supply needs to adapt to the harsh environment of coal mines, such as high humidity, much dust and possible existence of flammable and explosive gases such as methane, and at the same time needs to meet the requirements of fast response, stable output and high safety of emergency power supply.

[0003] The existing sodium ion battery emergency power supply for coal mines still has significant deficiencies in actual application. Firstly, flammable and explosive gases such as methane exist in coal mines, the existing emergency power supply lacks an efficient sealing protection mechanism linked with gas concentration monitoring, when the methane concentration exceeds the standard, the contact between the internal electrical elements of the power supply and the external flammable and explosive gases cannot be quickly isolated, which easily leads to the risk of gas explosion; and for the possible spontaneous combustion of sodium ion batteries, the fire extinguishing measures of the existing device mostly rely on external fire extinguishing systems or single cooling structures, lack built-in and self-triggered fire extinguishing mechanisms, the fire extinguishing response is lagging, which easily leads to the spread of fire. Secondly, the safety functions such as power-off, sealing and fire extinguishing of the existing emergency power supply mostly rely on the driving of the main power supply system, when the main power supply fails or the battery body fails, the safety functions are easily paralyzed synchronously and cannot be triggered autonomously; at the same time, there is a lack of collaborative linkage design between the safety functions, such as asynchronous sealing operation and power-off operation, and the sealing state cannot be maintained during the fire extinguishing process, which leads to poor protection effect, and the existing heat dissipation structure is mostly designed with fixed rotation speed, which cannot adaptively adjust the heat dissipation efficiency according to the internal temperature of the power supply box, and it is difficult to balance the contradiction between heat dissipation demand and sealing protection, which further affects the operation stability and safety of the emergency power supply. SUMMARY

[0004] The present application overcomes the deficiencies of the prior art and provides a sodium ion battery emergency power supply for coal mines; solves the problems of fragmented protection and lagging response of the existing emergency power supply; and the present application is implemented through the following technical solutions: An emergency power supply for coal mines using sodium-ion batteries includes a power box containing a sodium-ion battery body. A door is symmetrically and rotatably connected to the front side of the power box, and ventilation openings are provided on the side walls. A receiving plate is positioned above the sodium-ion battery body and is slidably connected to the power box vertically. A receiving piece corresponding to the tabs of the sodium-ion battery body is fixedly connected to the bottom of the receiving plate. A methane sensor, a power-off assembly, and a temperature sensor are fixedly connected to the top of the power box. The power-off assembly separates the receiving plate from the sodium-ion battery body. A gas chamber containing high-pressure inert gas is located inside the bottom of the power box. A venting assembly is located at the top of the gas chamber. A sealing assembly is located inside the power box. The methane sensor monitors the methane concentration outside the power box in real time, and the temperature sensor monitors the internal temperature of the power box in real time. When the methane concentration exceeds the standard or the internal temperature of the power box exceeds a threshold, the power-off assembly, sealing assembly, and venting assembly are triggered.

[0005] Furthermore, ventilation openings are provided on the rear, left, and right sides of the power supply box; multiple sets of fixing rods are longitudinally fixedly connected inside the power supply box; multiple layers of fixing plates are equidistantly arranged from top to bottom inside the power supply box, and the fixing plates are fixedly connected to the fixing rods; multiple sets of sodium-ion battery bodies are fixedly connected to each layer of fixing plates; a junction plate is provided above the sodium-ion battery bodies on each layer of fixing plates, and the junction plate is slidably connected to the fixing rods; multiple junction plates are fixedly connected by connecting columns.

[0006] Furthermore, a third spring is symmetrically fixedly connected to the top of the uppermost junction board, and the top end of the third spring is fixedly connected to the inner wall of the top of the power supply box; the third spring is a compression spring.

[0007] Furthermore, the sealing assembly includes a sealing plate located inside the side wall of the power supply box, and the sealing plate has a strip-shaped opening corresponding to the vent. The sealing plate is slidably connected to the power supply box. The total weight of the sealing plate is greater than twice the total weight of the multiple power supply plates and connecting posts. When the sealing assembly is triggered, the sealing plate descends to a position that completely covers the vent, thereby achieving full enclosure of the power supply box.

[0008] Furthermore, the sealing plate is provided on the rear, left, and right sides of the power supply box; a first sliding plate with a square cross-section is fixedly connected to the front end of the sealing plate on the left and right sides; a second sliding plate with an L-shaped cross-section is fixedly connected to the rear end of the sealing plate on the left and right sides; the sealing plate on the rear side is fixedly connected to the sealing plates on the left and right sides via the second sliding plate; slide rails are fixedly connected to the four corners of the power supply box, and the first and second sliding plates slide in cooperation with the slide rails; an electric push rod is fixedly connected to the bottom of the rear side of the power supply box, and the output end of the electric push rod is fixedly connected to the bottom end of the sealing plate on the rear side; an independent power supply is fixedly connected inside the bottom of the power supply box, and the independent power supply provides power to the electric push rod.

[0009] Furthermore, the power-off assembly includes a first roller, a second roller, a second mounting plate, and a third roller; the inner walls of the rear ends of the top two sides of the power supply box are rotatably connected to the first rollers via a set of first mounting plates; the inner walls of the front ends of the top two sides of the power supply box are rotatably connected to the second rollers via another set of first mounting plates; the tops of the sealing plates on the left and right sides are fixedly connected to the second mounting plates; a connecting rod is fixedly connected between the two second mounting plates; the two ends of the connecting rod are rotatably connected to the third roller via bearings, the third roller is located between the first roller and the second roller, and the first roller, the second roller, and the third roller are collinear; the left and right ends of the uppermost power receiving plate are fixedly connected to connecting ropes via connecting ears; the connecting ropes pass sequentially from below the first roller, above the third roller, and below the second roller, and are then fixedly connected to the rear side of the door.

[0010] Furthermore, the venting assembly includes vent cylinders, with multiple sets of vent cylinders fixedly connected in an array to the top of the air chamber; a sliding column is provided at the top of the vent cylinder, and wing plates are fixedly connected to both sides of the sliding column, the wing plates being slidably connected to the vent cylinder; a plug is fixedly connected to the bottom of the sliding column inserted into the vent cylinder, the plug being used to seal the vent cylinder; a horizontal plate is fixedly connected to the inside of the bottom end of the vent cylinder, and a guide rod is fixedly connected to the bottom of the plug, the guide rod being slidably connected to the horizontal plate; a first spring is sleeved on the outer wall of the guide rod. The top end of the first spring is fixedly connected to the plug, and the bottom end of the first spring is fixedly connected to the horizontal plate. The first spring is a compression spring, and the first spring always has an elastic force that pushes the plug closer to the air outlet. The top of the sliding column extends out of the air outlet and is fixedly connected to an inverted cone block. A pressure plate that cooperates with the inverted cone block is provided above the inverted cone block. An air outlet is provided at the top of the air outlet. The maximum diameter of the plug and the inverted cone block is larger than the diameter of the air outlet, and the diameter of the sliding column is smaller than the diameter of the air outlet.

[0011] Furthermore, a sacrificial rod is fixedly connected to the bottom of the pressure plate along an equidistant direction, and the sacrificial rod is fixedly connected to the inner wall of the bottom of the power supply box; a second spring is provided on the outer side of the sacrificial rod, the top end of the second spring is fixedly connected to the pressure plate, and the bottom end of the second spring is fixedly connected to the inner wall of the bottom of the power supply box; the second spring is a tension spring, and the second spring always has an elastic force to pull the pressure plate closer to the inverted cone block.

[0012] Furthermore, the top of the power supply box has an opening; a heat dissipation box for heat dissipation of the power supply box is fixedly connected to one side of the power supply box, and a controller is fixedly connected to the front side of the heat dissipation box; the methane sensor and the temperature sensor transmit the monitoring data synchronously to the controller.

[0013] Furthermore, a cooling fan is rotatably connected inside the heat sink via a third mounting plate; a motor is fixedly connected to the side of the heat sink away from the power supply box, and the output end of the motor is fixedly connected to the middle of the cooling fan; the motor and the cooling fan are electrically connected via a thermistor.

[0014] The beneficial effects of this invention compared to the prior art are as follows: I. Closed-loop safety protection, with no blind spots under extreme working conditions. This invention addresses the flammable, explosive, and complex operating environment of underground coal mines by constructing a complete safety closed loop of "monitoring-triggering-protection," thoroughly resolving the fragmented and delayed response issues of existing emergency power supply protection. Dual risk monitoring is achieved through a methane sensor and a temperature sensor at the top of the power supply box, capturing abnormal conditions such as excessive methane concentration and battery spontaneous combustion in real time. After the trigger signal is accurately transmitted to the controller, the sealing component, power-off component, and venting component work in tandem: the sealing plate quickly seals the ventilation opening to isolate flammable and explosive gases; the power-off component simultaneously cuts off the circuit to eliminate ignition sources; and the venting component releases high-pressure inert gas to suffocate and extinguish the fire. These three components form a seamless protective chain. Simultaneously, the sealing component uses an independent power supply, and the electric push rod has a non-locking design. Combined with a structural setting where the weight of the sealing plate is greater than the total weight of the connecting plate and connecting column, even if the independent power supply fails, the sealing plate can still achieve sealing protection by its own weight, ensuring that core protection capabilities are not lost even in the event of dual failure of the main power supply and the independent power supply, achieving comprehensive safety assurance under extreme conditions.

[0015] II. The fire extinguishing mechanism is autonomous and efficient, combining effective fire suppression with ease of maintenance. This invention overcomes the limitations of existing emergency power supplies that rely on external fire suppression systems or single-mode cooling for fire extinguishing. It innovatively designs a built-in autonomous fire extinguishing mechanism, combining high fire extinguishing efficiency with convenient maintenance. High-pressure inert gas stored in the gas chamber serves as the extinguishing medium, activated through two independent triggering paths: first, the flame directly burns off the sacrificial rod when the battery spontaneously combusts; second, the sealing component mechanically crushes and breaks the sacrificial rod during operation. This dual triggering ensures a zero-delay fire extinguishing response. During the fire extinguishing process, the sealing plate keeps the ventilation opening closed, preventing inert gas leakage and the entry of external combustion-supporting gases, significantly improving the efficiency of suffocation fire extinguishing. Furthermore, the elasticity of the first spring in the venting component can push the plug to reset and seal the vent cylinder after fire extinguishing. Fire extinguishing medium replenishment and device reset can be completed without disassembling the equipment, significantly reducing maintenance costs and operational difficulty, and meeting the practical needs of inconvenient equipment maintenance in coal mines.

[0016] III. Dual protection for power outage operation, balancing power supply reliability and timely disconnection. This invention innovatively designs a dual power-off mechanism of "automatic + manual," ensuring both the stability of normal power supply and the timeliness and reliability of circuit disconnection under abnormal conditions. Automatic power-off is achieved through the linkage of the sealing component and the power-off component: as the sealing plate slides down, it drives the third roller to press the connecting rope. After the first and second rollers change the direction of the force, they pull the contact plate upward, quickly separating the contact piece from the sodium-ion battery tab. Manual power-off can be accomplished by directly opening the power box door and pulling the connecting rope. The two methods operate independently and do not interfere with each other. Simultaneously, the rollers in the power-off component significantly reduce the sliding friction of the connecting rope, and the compression force of the third spring ensures that the contact piece and tab are tightly fitted when the contact plate resets. This avoids safety hazards caused by incomplete power-off and ensures rapid restoration of the power supply circuit after fault resolution, achieving a functional balance of "rapid disconnection in abnormal situations and stable conduction in normal situations."

[0017] IV. Dynamic adaptation of heat dissipation and protection, optimization of energy consumption and equipment lifespan This invention addresses the pain points of existing emergency power supplies, which suffer from fixed heat dissipation efficiency and an inability to balance heat dissipation and protection requirements. It designs an adaptive heat dissipation mechanism to achieve dynamic matching of heat dissipation effect, energy consumption control, and protection functions. The heat dissipation component is electrically connected to the motor and cooling fan via a thermistor, allowing real-time adjustment of the cooling fan speed based on the internal temperature of the power supply box: automatically increasing the speed to enhance heat dissipation when the temperature rises, and decreasing the speed to reduce energy consumption when the temperature falls, avoiding energy waste or insufficient heat dissipation caused by fixed-speed cooling. Simultaneously, the thermistor and the top temperature sensor form a dual temperature monitoring system. Under normal conditions, efficient heat dissipation is achieved through the ventilation openings. Under abnormal operating conditions, when the sealing component closes the ventilation openings, the heat dissipation component simultaneously stops efficient heat dissipation. This prevents inert gas leakage from affecting fire extinguishing effectiveness and avoids conflicts between heat dissipation and protection functions, ensuring that the sodium-ion battery and electrical components operate within a suitable temperature range and extending the equipment's lifespan. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a sodium-ion battery emergency power supply for coal mines provided by the present invention; Figure 2 This is a schematic diagram of the cross-section of the heat sink. Figure 3 This is a cross-sectional view of the top of the power supply box. Figure 4 for Figure 3 The diagram shows the structure of part A. Figure 5 This is a cross-sectional view of the middle section of the power supply box. Figure 6 This is a schematic diagram of the junction box structure; Figure 7 This is a schematic diagram of the structure of a sodium-ion battery. Figure 8 This is a schematic diagram of the cross-section of the slide rail; Figure 9 This is a schematic diagram of the bottom of the power supply box; Figure 10 This is a cross-sectional view of the bottom of the power supply box. Figure 11 This is a schematic diagram of the cross-sectional structure of the air outlet. Figure 12 This is a schematic diagram of the structure of the dorsal side of the air chamber.

[0019] The diagram is labeled as follows: 1. Power supply box; 2. Door; 3. Ventilation opening; 4. Heat sink; 5. Controller; 6. Fixing rod; 7. Fixing plate; 8. Sodium-ion battery body; 9. Connecting plate; 10. Connecting column; 11. Connecting piece; 12. Methane sensor; 13. Gas chamber; 14. Opening; 15. Gas outlet; 16. Sliding column; 17. Wing plate; 18. Plug; 19. Horizontal plate; 20. Guide rod; 21. First spring; 22. Inverted cone block; 23. Pressure plate; 24. Gas outlet. 25. Sacrificial rod; 26. Second spring; 27. Sealing plate; 28. First slide plate; 29. ​​Second slide plate; 30. Slide rail; 31. Electric push rod; 32. Independent power supply; 33. First mounting plate; 34. First roller; 35. Second roller; 36. Second mounting plate; 37. Third roller; 38. Connecting ear; 39. Connecting rope; 40. Third spring; 41. Third mounting plate; 42. Cooling fan; 43. Motor; 44. Temperature sensor; 45. Connecting rod. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0021] See Figures 1 to 12 This embodiment proposes a sodium-ion battery emergency power supply for coal mines. The sodium-ion battery emergency power supply for coal mines includes: a power box 1, with a door 2 symmetrically rotatably connected to the front side of the power box 1, and ventilation openings 3 on the rear, left, and right sides of the power box 1; a heat dissipation box 4 for heat dissipation of the power box 1 is fixedly connected to one side of the power box 1, and a controller 5 is fixedly connected to the front side of the heat dissipation box 4; multiple sets of fixing rods 6 are longitudinally fixedly connected inside the power box 1, and multiple layers of fixing plates 7 are equidistantly arranged from top to bottom inside the power box 1, with the fixing plates 7 fixedly connected to the fixing rods 6; multiple sets of sodium-ion battery bodies 8 are fixedly connected to each layer of fixing plates 7; and sodium-ion battery bodies 8 on each layer of fixing plates 7 are... Each of the power supply boxes 1 has a top-mounted electrode plate 9, which is slidably connected to the fixing rod 6. Multiple electrode plates 9 are fixedly connected by connecting posts 10. The bottom of each electrode plate 9 is fixedly connected to multiple sets of electrode contacts 11 corresponding to the tabs of the sodium-ion battery body 8. A methane sensor 12 is fixedly connected to the top of the power supply box 1. A gas chamber 13 is opened inside the bottom of the power supply box 1, and the gas chamber 13 stores high-pressure inert gas. A venting assembly is provided at the top of the gas chamber 13, and an opening 14 is provided at the top of the power supply box 1. A sealing assembly is provided inside the power supply box 1. A power-off assembly and a temperature sensor 44 are provided at the top of the power supply box 1. The power-off assembly is used to separate the electrode plate 9 from the sodium-ion battery body 8.

[0022] This emergency power supply uses a sodium-ion battery body 8 as the core energy storage unit. The sodium-ion battery body 8 is stably installed through the cooperation of the fixing plate 7 and the fixing rod 6. Multiple power connection plates 9 are linked together by the connecting column 10 to ensure synchronous movement.

[0023] A third spring 40 is symmetrically fixedly connected to the top of the uppermost power receiving plate 9. The top of the third spring 40 is fixedly connected to the inner wall of the top of the power supply box 1. The third spring 40 is a compression spring, and it always has an elastic force that pushes the power receiving plate 9 downward. Under normal conditions, the elastic force of the third spring 40 pushes the power receiving plate 9 downward along the fixed rod 6, so that the receiving plate 11 at the bottom of the power receiving plate 9 makes precise contact with the electrode tab of the sodium-ion battery body 8, realizing circuit conduction and providing continuous emergency power supply for critical loads such as ventilation equipment, lighting systems, and communication devices in coal mines.

[0024] Ventilation openings 3 on the rear, left, and right sides of the power supply box 1 form a daily heat dissipation channel, ensuring the equipment operates at a normal temperature. The methane sensor 12 at the top of the power supply box 1 monitors the external methane concentration in real time, and the temperature sensor 44 monitors the internal temperature of the power supply box 1 in real time. Both sensors transmit the monitoring data synchronously to the controller 5, providing a basis for judging abnormal operating conditions. The high-pressure inert gas stored in the gas chamber 13 serves as the built-in fire extinguishing medium. The venting component, sealing component, and power-off component work together under the coordination of the controller 5 to form a closed loop of "monitoring-triggering-protection". The controller 5, as the core control unit, receives sensor signals and drives each component to perform sealing, power-off, and fire extinguishing operations, ensuring the safety and reliability of the equipment in complex coal mine environments.

[0025] like Figure 1 , Figure 9 , Figure 10 , Figure 11 As shown, the venting assembly includes: vent cylinders 15, with multiple sets of vent cylinders 15 fixedly connected in an array to the top of the air chamber 13; a sliding column 16 is provided at the top of the vent cylinder 15, and wing plates 17 are fixedly connected to both sides of the sliding column 16, the wing plates 17 being slidably connected to the vent cylinder 15; a plug block 18 is fixedly connected to the bottom of the sliding column 16 inserted into the vent cylinder 15, the plug block 18 being used to block the vent cylinder 15; a horizontal plate 19 is fixedly connected to the inside of the bottom end of the vent cylinder 15, and a guide rod 20 is fixedly connected to the bottom of the plug block 18, the guide rod 20 being slidably connected to the horizontal plate 19; a first spring 21 is sleeved on the outer wall of the guide rod 20, the top end of the first spring 21 being fixedly connected to the plug block 18, and the bottom end of the first spring 21 being fixedly connected to the horizontal plate 19; the first spring 21 is a compression spring, and the first spring 21 always has an elastic force to push the plug block 18 closer to the vent cylinder 15. The top of the sliding column 16 extends out of the air outlet 15 and is fixedly connected to an inverted cone block 22. A pressure plate 23 that cooperates with the inverted cone block 22 is provided above the inverted cone block 22. An air outlet 24 is opened at the top of the air outlet 15. The maximum diameter of the plug block 18 and the inverted cone block 22 is larger than the diameter of the air outlet 24, and the diameter of the sliding column 16 is smaller than the diameter of the air outlet 24. A sacrificial rod 25 is fixedly connected to the bottom of the pressure plate 23 along an equidistant direction. The sacrificial rod 25 is fixedly connected to the inner wall of the bottom of the power supply box 1. A second spring 26 is provided on the outside of the sacrificial rod 25. The top end of the second spring 26 is fixedly connected to the pressure plate 23, and the bottom end of the second spring 26 is fixedly connected to the inner wall of the bottom of the power supply box 1. The second spring 26 is a tension spring, and the second spring 26 always has an elastic force to pull the pressure plate 23 closer to the inverted cone block 22.

[0026] Part Two: Working Principle: Under normal conditions, the first spring 21 is in a compressed state, and its continuous elastic force pushes the plug 18 to fit tightly against the inner wall of the air outlet 15, thereby achieving the sealing and isolation of the air chamber 13 and preventing leakage of the internal high-pressure inert gas; the second spring 26 is in a stretched state, generating a continuous pulling force to pull the pressure plate 23 closer to the inverted cone block 22, but the two remain in a non-contact state, and the sacrificial rod 25 is in an upright state to provide stable support for the pressure plate 23. When the temperature sensor 44 detects an abnormal increase in the internal temperature of the power supply box 1 (such as spontaneous combustion of the sodium-ion battery body 8), there are two triggering paths: First, the flame directly burns off the sacrificial rod 25. The pressure plate 23, which loses its support, moves rapidly downward under the tension of the second spring 26, precisely squeezing the inverted cone block 22 to move downward simultaneously. The inverted cone block 22 drives the sliding column 16 to slide vertically along the inner wall of the air outlet 15. The wing plates 17 on both sides of the sliding column 16 slide and cooperate with the inner wall of the air outlet 15, effectively preventing the sliding column 16 from tilting or shifting. During the downward movement of the sliding column 16, the plug block 18 is simultaneously pulled away from the sealing position of the air outlet 15. The high-pressure inert gas stored in the gas chamber 13 is quickly released into the power supply box 1 through the air outlet 24 at the top of the air outlet 15. At the same time, the opening 14 at the top of the power supply box 1 squeezes the internal combustion-supporting gas outward, creating an oxygen-deficient environment to suffocate and extinguish the fire. Second, when the sealing component is activated, it drives the pressure plate 23 to move downward, breaking the sacrificial rod 25 through mechanical pressure. The subsequent actions are the same as above. After the fire is extinguished, we await subsequent equipment maintenance.

[0027] like Figure 1 , Figure 3 , Figure 5 , Figure 7 , Figure 8 , Figure 12As shown, the sealing assembly includes: a sealing plate 27, which is provided on the rear, left, and right sides of the power supply box 1; the sealing plate 27 has a strip-shaped opening corresponding to the vent 3; a first sliding plate 28 is fixedly connected to the front end of the sealing plate 27 on the left and right sides, the first sliding plate 28 having a square cross-section; a second sliding plate 29 is fixedly connected to the rear end of the sealing plate 27 on the left and right sides, the second sliding plate 29 having an L-shaped cross-section; the sealing plate 27 on the rear side is fixedly connected to the sealing plates 27 on the left and right sides via the second sliding plate 29; slide rails 30 are fixedly connected to the four corners of the power supply box 1, and the first sliding plate 28 and the second sliding plate 29 slide in cooperation with the slide rails 30; the sum of the weights of the multiple sealing plates 27 is greater than twice the sum of the weights of the multiple power connection plates 9 and connecting posts 10. An electric push rod 31 is fixedly connected to the bottom rear side of the power supply box 1. The output end of the electric push rod 31 is fixedly connected to the bottom end of the sealing plate 27 located at the rear side. An independent power supply 32 is fixedly connected inside the bottom of the power supply box 1. The independent power supply 32 provides power to the electric push rod 31. The electric push rod 31 is a non-locking type electric push rod 31.

[0028] Part 3 Working principle: Under normal conditions, the strip opening on the sealing plate 27 is connected to the ventilation port 3 on the power supply box 1. The ventilation ports 3 on the rear, left and right sides of the power supply box 1 are kept fully open to ensure smooth airflow for daily heat dissipation. When the methane sensor 12 detects that the methane concentration outside the power supply box 1 exceeds the standard, or the temperature sensor 44 detects that the internal temperature of the power supply box 1 rises abnormally (such as the sodium-ion battery body 8 spontaneously combusting), the controller 5 immediately triggers the independent power supply 32 to supply power to the electric push rod 31 (this power supply link is independent of the connection status between the power supply board 9 and the sodium-ion battery body 8, and is not affected by whether the battery power supply is interrupted); the output end of the electric push rod 31 extends downward, driving the rear sealing plate 27 to slide downward along the slide rail 30. The rear sealing plate 27 pulls the left and right sealing plates 27 to slide vertically along the slide rail 30 simultaneously through the L-shaped second sliding plate 29. The square fit structure of the first sliding plate 28 and the slide rail 30, and the sliding fit of the second sliding plate 29 and the slide rail 30 ensure that the sliding process of the three sets of sealing plates 27 is smooth and without deviation; when the sealing plate 27 descends to the position that just completely covers the vent 3, the power supply box is activated. The fully enclosed design effectively isolates internal electrical components from external flammable and explosive gases, while also preventing inert gas leakage during fire extinguishing. If the venting assembly needs to be activated to release inert gas, the electric push rod 31 continues to drive the sealing plate 27 downward. The lower surfaces of the sealing plates 27 on the left and right sides will contact the upper surfaces at both ends of the pressure plate 23 and apply downward pressure, pushing the pressure plate 23 downward and breaking the sacrificial rod 25, simultaneously triggering the venting assembly. At this time, the sealing plate 27 always remains closed to the ventilation opening 3. If the independent power supply 32 fails, since the electric push rod 31 has a non-self-locking structure and the total weight of the multiple sealing plates 27 is more than twice the total weight of the multiple power plates 9 and connecting columns 10, the sealing plate 27 slides downward along the slide rail 30 under its own gravity, eventually completely covering and sealing the ventilation opening 3, ensuring basic sealing protection can still be achieved in the event of power failure.

[0029] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the power-off assembly includes: a first roller 34, a second roller 35, a second mounting plate 36, and a third roller 37; the inner walls of the rear ends of the top two sides of the power supply box 1 are respectively rotatably connected to the first roller 34 via a set of first mounting plates 33; the inner walls of the front ends of the top two sides of the power supply box 1 are respectively rotatably connected to the second roller 35 via another set of first mounting plates 33; the tops of the sealing plates 27 on the left and right sides are fixedly connected to the second mounting plates 36; a connecting rod 45 is fixedly connected between the two second mounting plates 36; both ends of the connecting rod 45 are rotatably connected to the third roller 37 via bearings, the third roller 37 is located between the first roller 34 and the second roller 35, and the first roller 34, the second roller 35, and the third roller 37 are arranged collinearly. The left and right ends of the top-level electrical board 9 are fixedly connected to connecting ropes 39 via connecting ears 38; the connecting ropes 39 pass through the bottom of the first roller 34, the top of the third roller 37, and the bottom of the second roller 35 in sequence, and are then fixedly connected to the rear side of the door 2.

[0030] Part Four: Working Principle: Under normal conditions, the third spring 40 is in a compressed state. Its continuous elastic force pushes the contact plate 9 downward along the fixed rod 6, causing the contact piece 11 at the bottom of the contact plate 9 to fit tightly with the tab of the sodium-ion battery body 8, ensuring stable conduction of the power supply circuit. When an abnormal operating condition occurs and the circuit needs to be cut off, there are two independent triggering methods: Manual triggering: The operator rotates to open the door 2 of the power box 1. During the rotation of the door 2, the connecting rope 39 will be pulled backward. The connecting rope 39 passes under the second roller 35, above the third roller 37, and under the first roller 34 in sequence (the three sets of rollers change the direction of force on the connecting rope 39 by rotating in coordination, and at the same time greatly reduce sliding friction). An upward pulling force is applied through the connecting ears 38 at both ends of the electrode plate 9, which drives the electrode plate 9 to slide upward along the fixed rod 6. The electrode plate 11 is completely separated from the electrode ears of the sodium ion battery body 8, and the circuit is de-energized. Automatic triggering: When the sealing assembly is activated, the sealing plate 27 slides downward, simultaneously driving the second mounting plate 36 and connecting rod 45 at the top to move downward. The third rollers 37 at both ends of the connecting rod 45 move downward along the collinear trajectory of the first roller 34 and the second roller 35. During the downward movement of the third rollers 37, they press down on the middle position of the connecting rope 39. The connecting rope 39 transmits the tension to the contact plate 9 through the connecting ear 38, driving the contact plate 9 to slide upward along the fixed rod 6, thus achieving the separation and power disconnection of the contact piece 11 from the electrode ear. After the power outage is completed, if the door 2 of the power supply box 1 is manually closed and the sealing plate 27 is reset, the compression elastic force of the third spring 40 will push the contact plate 9 to slide down along the fixed rod 6, so that the contact piece 11 can re-make close contact with the tab of the sodium-ion battery body 8, and restore the power supply circuit.

[0031] likeFigure 1 and Figure 2 As shown, a cooling fan 42 is rotatably connected inside the heat sink 4 via a third mounting plate 41; a motor 43 is fixedly connected to the side of the heat sink 4 away from the power supply box 1, and the output end of the motor 43 is fixedly connected to the middle of the cooling fan 42; the motor 43 and the cooling fan 42 are electrically connected via a thermistor.

[0032] During daily operation, the thermistor senses the temperature changes inside the power supply box 1 in real time, forming a dual temperature monitoring mechanism with the temperature sensor 44 at the top (the temperature sensor 44 focuses on safety protection triggered by abnormal high temperature, while the thermistor focuses on heat dissipation for normal temperature regulation). When the internal temperature of the power supply box 1 rises, the resistance of the thermistor decreases accordingly, increasing the supply current of the motor 43 and boosting its operating power. This, in turn, drives the cooling fan 42 to increase its speed, enhancing the airflow and quickly expelling heat from the power supply box 1 through the vent 3. Conversely, when the internal temperature of the power supply box 1 decreases, the resistance of the thermistor rises, decreasing the supply current of the motor 43 and reducing its operating power. This slows down the cooling fan 42, reducing unnecessary energy consumption. Through the adaptive adjustment of the thermistor, the heat dissipation efficiency is dynamically matched with the internal temperature of the power supply box 1, ensuring stable operation of the sodium-ion battery body 8 and all electrical components within a suitable temperature range while avoiding energy waste caused by excessive heat dissipation. Furthermore, this heat dissipation component works in synergy with the sealing component. Under normal conditions, it efficiently dissipates heat through the vent 3. Under abnormal operating conditions, when the sealing component closes the vent 3, the heat dissipation component automatically stops efficient heat dissipation, balancing the functional conflict between heat dissipation requirements and sealing protection.

[0033] The working principle of this invention is as follows: I. Normal Operating Status Under normal conditions, multiple sodium-ion battery bodies 8 are securely installed on the fixing plate 7 and the fixing rod 6 inside the power supply box 1. Multiple sets of connecting plates 9 are linked together by the connecting column 10. Under the compression elastic force of the third spring 40, they slide downward along the fixing rod 6, so that the connecting piece 11 at the bottom of the connecting plate 9 precisely contacts the electrode tab of the sodium-ion battery body 8, and the circuit is connected, providing continuous emergency power to critical loads such as ventilation equipment, lighting systems, and communication devices in coal mines. The ventilation openings 3 on the rear, left, and right sides of the power supply box 1 remain open, and the heat dissipation components operate synchronously: the thermistor in the heat dissipation box 4 senses the internal temperature of the power supply box 1 in real time, forming a dual monitoring system with the temperature sensor 44 at the top of the power supply box 1; when the temperature rises, the resistance value of the thermistor decreases, the power supply current of the motor 43 increases, and the speed of the cooling fan 42 increases, enhancing the heat dissipation efficiency; when the temperature drops, the resistance value of the thermistor increases, the power of the motor 43 decreases, and the speed of the cooling fan 42 slows down, achieving dynamic matching between heat dissipation efficiency and temperature, ensuring that the equipment operates at normal temperature while avoiding energy waste. At this time, the strip opening on the sealing plate 27 of the sealing assembly is connected to the vent 3. In the venting assembly, the first spring 21 pushes the plug 18 to block the air outlet 15. The second spring 26 stretches and pulls the pressure plate 23 close to the inverted cone block 22 but does not contact it. The sacrificial rod 25 is upright and supported, and the air chamber 13 remains sealed. The connecting rope 39 of the power-off assembly is in a slack state, and the power-connecting plate 9 maintains the power supply conduction state under the action of the third spring 40.

[0034] II. Anomaly Monitoring and Triggering Mechanism The methane sensor 12 at the top of the power supply box 1 monitors the external methane concentration in real time, and the temperature sensor 44 monitors the internal temperature in real time. Both sensors continuously transmit the monitoring data to the controller 5. When the methane concentration exceeds the standard or the internal temperature rises abnormally (such as the sodium-ion battery body 8 spontaneously combusting), the controller 5 activates the emergency protection program. If the independent power supply 32 fails and there is no power, because the electric push rod 31 of the sealing assembly is non-locking and the total weight of the multiple sealing plates 27 is more than twice the total weight of the multiple power connection plates 9 and connecting posts 10, the sealing plate 27 can trigger subsequent protection actions by its own weight, ensuring that it can still respond when the power is cut off.

[0035] III. Sealing Protection and Synchronous Power Deactivation After the protection procedure is activated, the sealing component acts first: if the independent power supply 32 is normal, the controller 5 drives the independent power supply 32 to supply power to the electric push rod 31 (this power supply link is independent of the main battery circuit and is not affected by the separation of the power board 9). The output end of the electric push rod 31 extends downward, driving the rear sealing plate 27 to slide down along the slide rail 30. The rear sealing plate 27 pulls the left and right sealing plates 27 to slide synchronously along the slide rail 30 through the L-shaped second sliding plate 29. The square fit between the first sliding plate 28 and the slide rail 30 ensures smooth sliding. Finally, the sealing plate 27 completely covers the vent 3, isolating the internal electrical components from contact with external flammable and explosive gases, and preventing the leakage of inert gas during subsequent fire extinguishing. If the independent power supply 32 is de-energized, the sealing plate 27 slides down along the slide rail 30 under its own weight, completing the sealing of the vent 3.

[0036] During the downward movement of the sealing plate 27, the power-off component is triggered simultaneously: the second mounting plate 36 at the top of the sealing plate 27 moves the connecting rod 45 downward, and the third rollers 37 at both ends of the connecting rod 45 move downward along the trajectory of the first roller 34 and the second roller 35, which are set collinearly. This presses down on the middle of the connecting rope 39. After the connecting rope 39 changes the direction of force through the first roller 34 and the second roller 35, it pulls the connecting plate 9 upward along the fixed rod 6 through the connecting ears 38 at both ends of the connecting plate 9. The connecting piece 11 separates from the electrode ear of the sodium-ion battery body 8, realizing automatic power-off. In addition, the operator can also manually open the door 2 of the power box 1. When the door 2 is turned, it pulls the connecting rope 39, which also causes the connecting plate 9 to slide upward and cut off the power. After the power is cut off, the third spring 40 remains in a compressed state. When it is reset later, it pushes the connecting plate 9 back to its position to connect the circuit.

[0037] IV. Inert Gas Fire Extinguishing Procedures If only sealing protection is required, the sealing plate 27 descends to cover the ventilation opening 3 and then stops. If fire extinguishing is required (such as battery spontaneous combustion), the electric push rod 31 continues to drive the sealing plate 27 to descend. The lower surfaces of the sealing plates 27 on the left and right sides press against the two ends of the pressure plate 23, breaking the sacrificial rod 25 (or the flame directly burns off the sacrificial rod 25). The tension of the second spring 26 pulls the pressure plate 23 down quickly, pressing the inverted cone block 22 down simultaneously. The inverted cone block 22 drives the sliding column 16 to slide down along the inner wall of the air outlet 15. The wing plates 17 on both sides of the sliding column 16 prevent tilting and at the same time pull the plug block 18 away from the sealing position of the air outlet 15. The high-pressure inert gas stored in the gas chamber 13 is quickly released into the power box 1 through the air outlet 24 at the top of the air outlet 15. The opening 14 at the top of the power box 1 squeezes the internal combustion-supporting gas outward, creating an oxygen-deficient environment to suffocate and extinguish the fire. After the fire is extinguished, the compression force of the first spring 21 pushes the plug 18 to reset, re-sealing the air outlet 15, awaiting subsequent maintenance.

[0038] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0039] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this invention.

Claims

1. A sodium-ion battery emergency power supply for coal mines, comprising a power supply box (1), a sodium-ion battery body (8) installed inside the power supply box (1), a door (2) symmetrically rotatably connected to the front side of the power supply box (1), and a ventilation opening (3) provided on the side wall of the power supply box (1); characterized in that, A junction plate (9) is provided above the sodium-ion battery body (8), and the junction plate (9) is slidably connected to the power supply box (1) in the vertical direction; a junction piece (11) corresponding to the tab of the sodium-ion battery body (8) is fixedly connected to the bottom of the junction plate (9); a methane sensor (12), a power-off component and a temperature sensor (44) are fixedly connected to the top of the power supply box (1); the power-off component is used to separate the junction plate (9) and the sodium-ion battery body (8); a gas chamber (13) is opened inside the bottom of the power supply box (1), and a high-pressure inert gas is stored in the gas chamber (13); a venting component is provided on the top of the gas chamber (13); a sealing component is provided inside the power supply box (1); the methane sensor (12) monitors the methane concentration outside the power supply box (1) in real time, and the temperature sensor (44) monitors the internal temperature of the power supply box (1) in real time. When the methane concentration exceeds the standard or the internal temperature of the power supply box (1) exceeds the threshold, the power-off component, the sealing component and the venting component are triggered.

2. The sodium-ion battery emergency power supply for coal mines according to claim 1, characterized in that, Ventilation openings (3) are provided on the rear, left and right sides of the power supply box (1); multiple sets of fixing rods (6) are fixedly connected longitudinally inside the power supply box (1); multiple layers of fixing plates (7) are equidistantly arranged from top to bottom inside the power supply box (1); the fixing plates (7) are fixedly connected to the fixing rods (6); multiple sets of sodium-ion battery bodies (8) are fixedly connected on each layer of fixing plate (7); a junction plate (9) is provided above the sodium-ion battery body (8) on each layer of fixing plate (7); the junction plate (9) is slidably connected to the fixing rods (6); multiple junction plates (9) are fixedly connected by connecting columns (10).

3. The emergency power supply for coal mines using sodium-ion batteries according to claim 2, characterized in that, A third spring (40) is symmetrically fixedly connected to the top of the top terminal board (9), and the top of the third spring (40) is fixedly connected to the inner wall of the top of the power supply box (1); the third spring (40) is a compression spring.

4. The sodium-ion battery emergency power supply for coal mines according to claim 2, characterized in that, The sealing assembly includes a sealing plate (27), which is located inside the side wall of the power supply box (1). The sealing plate (27) has a strip-shaped opening corresponding to the vent (3). The sealing plate (27) is slidably connected to the power supply box (1). The total weight of the sealing plate (27) is more than twice the total weight of the multiple power connection plates (9) and connecting columns (10). After the sealing assembly is triggered, the sealing plate (27) descends to a position that completely covers the vent (3), thereby achieving full enclosure of the power supply box (1).

5. The sodium-ion battery emergency power supply for coal mines according to claim 4, characterized in that, The power supply box (1) is equipped with sealing plates (27) on its rear, left, and right sides. A first sliding plate (28) is fixedly connected to the front end of the sealing plates (27) on the left and right sides, and the first sliding plate (28) has a square cross-section. A second sliding plate (29) is fixedly connected to the rear end of the sealing plates (27) on the left and right sides, and the second sliding plate (29) has an L-shaped cross-section. The sealing plate (27) on the rear side is fixedly connected to the sealing plates (27) on the left and right sides via the second sliding plate (29). Fixed connection; a slide rail (30) is fixedly connected to each of the four corners inside the power supply box (1), and the first slide plate (28) and the second slide plate (29) slide in cooperation with the slide rail (30); an electric push rod (31) is fixedly connected to the bottom of the rear side of the power supply box (1), and the output end of the electric push rod (31) is fixedly connected to the bottom end of the sealing plate (27) located on the rear side; an independent power supply (32) is fixedly connected inside the bottom of the power supply box (1), and the independent power supply (32) provides power to the electric push rod (31).

6. The sodium-ion battery emergency power supply for coal mines according to claim 5, characterized in that, The power-off assembly includes a first roller (34), a second roller (35), a second mounting plate (36), and a third roller (37); the inner walls of the rear ends of the top two sides of the power supply box (1) are respectively rotatably connected to the first roller (34) via a set of first mounting plates (33); the inner walls of the front ends of the top two sides of the power supply box (1) are respectively rotatably connected to the second roller (35) via another set of first mounting plates (33); the tops of the sealing plates (27) on the left and right sides are fixedly connected to the second mounting plates (36); a connecting rod (45) is fixedly connected between the two second mounting plates (36); the... Both ends of the connecting rod (45) are rotatably connected to the third roller (37) via bearings. The third roller (37) is located between the first roller (34) and the second roller (35), and the first roller (34), the second roller (35), and the third roller (37) are arranged in a collinear manner. The left and right ends of the top electrical board (9) are fixedly connected to the connecting rope (39) via connecting ears (38). The connecting rope (39) passes through the bottom of the first roller (34), the top of the third roller (37), and the bottom of the second roller (35) in sequence, and is fixedly connected to the rear side of the door (2).

7. The emergency power supply for coal mines using sodium-ion batteries according to claim 1, characterized in that, The venting assembly includes vent cylinders (15), and multiple sets of vent cylinders (15) are fixedly connected in an array to the top of the air chamber (13); a sliding column (16) is provided at the top of the vent cylinder (15), and a wing plate (17) is fixedly connected to both sides of the sliding column (16), and the wing plate (17) is slidably connected to the vent cylinder (15); a plug (18) is fixedly connected to the bottom of the sliding column (16) inserted into the vent cylinder (15), and the plug (18) is used to block the vent cylinder (15); a horizontal plate (19) is fixedly connected to the inside of the bottom end of the vent cylinder (15), and a guide rod (20) is fixedly connected to the bottom of the plug (18), and the guide rod (20) is slidably connected to the horizontal plate (19); a first spring (21) is sleeved on the outer wall of the guide rod (20). The top end of the first spring (21) is fixedly connected to the plug (18), and the bottom end of the first spring (21) is fixedly connected to the horizontal plate (19). The first spring (21) is a compression spring, and the first spring (21) always has an elastic force to push the plug (18) close to the air outlet (15). The top of the sliding column (16) extends out of the air outlet (15) and is fixedly connected to an inverted cone block (22). A pressure plate (23) that cooperates with the inverted cone block (22) is provided above the inverted cone block (22). An air outlet (24) is opened at the top of the air outlet (15). The maximum diameter of the plug (18) and the inverted cone block (22) is greater than the diameter of the air outlet (24), and the diameter of the sliding column (16) is smaller than the diameter of the air outlet (24).

8. The sodium-ion battery emergency power supply for coal mines according to claim 7, characterized in that, The bottom of the pressure plate (23) is fixedly connected with a sacrificial rod (25) along an equidistant direction. The sacrificial rod (25) is fixedly connected to the inner wall of the bottom of the power supply box (1). A second spring (26) is provided on the outside of the sacrificial rod (25). The top end of the second spring (26) is fixedly connected to the pressure plate (23), and the bottom end of the second spring (26) is fixedly connected to the inner wall of the bottom of the power supply box (1). The second spring (26) is a tension spring. The second spring (26) always has an elastic force that pulls the pressure plate (23) closer to the inverted cone block (22).

9. The sodium-ion battery emergency power supply for coal mines according to claim 1, characterized in that, The top of the power supply box (1) has an opening (14); a heat sink (4) for dissipating heat from the power supply box (1) is fixedly connected to one side of the power supply box (1), and a controller (5) is fixedly connected to the front side of the heat sink (4); the methane sensor (12) and the temperature sensor (44) transmit the monitoring data to the controller (5) synchronously.

10. A sodium-ion battery emergency power supply for coal mines according to claim 9, characterized in that, The heat sink (4) is rotatably connected to a cooling fan (42) via a third mounting plate (41); a motor (43) is fixedly connected to the side of the heat sink (4) away from the power supply box (1), and the output end of the motor (43) is fixedly connected to the middle of the cooling fan (42); the motor (43) and the cooling fan (42) are electrically connected via a thermistor.

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