Emergency protection device for mine battery

Abstract

The application provides an emergency protection device for mine storage batteries, and relates to the field of clean protection of mine storage batteries. The emergency protection device for mine storage batteries comprises a storage battery box, and further comprises self-cleaning battery frames. The self-cleaning battery frames are arranged in multiple groups in an up-down distribution, the distance between each group is the same, and each group is provided with air gaps with the same height. The multiple self-cleaning battery frames are arranged in the storage battery box. The two ends of the self-cleaning battery frames are provided with air inlet ends and air outlet ends. A reversing box is arranged between the air inlet end of any self-cleaning battery frame and the air outlet end of the self-cleaning battery frame arranged above the self-cleaning battery frame. The emergency protection device for mine storage batteries is provided with the self-cleaning battery frames and the middle cover. The circulating air with coal powder can be used to cool the storage batteries, the electrodes of the storage batteries can be continuously cleaned, and the coal powder can be separated. Thus, the high-power energy storage equipment can be safely used in the underground.

Description

Technical Field

[0001] This invention relates to the field of cleanliness and protection for mining batteries, specifically an emergency protection device for mining batteries. Background Technology

[0002] Lithium-ion batteries, as rechargeable batteries, are widely used in various fields due to their advantages such as high safety, safe and fast charging and discharging, small size, light weight, and high energy density. Currently, most mining equipment also uses lithium-ion batteries for power. With continuous technological advancements, polymer lithium-ion batteries are widely used in various equipment and tools in mining scenarios. These batteries utilize lithium-ion battery technology and polymer electrolytes to store and release electrical energy, offering advantages such as high energy density, long lifespan, and lightweight design.

[0003] To provide a relatively stable working environment for mining lithium-ion batteries, they are typically placed in dedicated power supply boxes. However, traditional power supply boxes are usually simple in structure and have limited functionality, merely providing storage space for lithium-ion batteries. Mining environments contain large amounts of dust and moisture. Contact between moisture and dust and the batteries can cause corrosion and wear inside the equipment, significantly impacting their normal operation.

[0004] Due to the unique nature of the mining environment, lithium-ion batteries are required to be cost-effective and safe power sources, and must not catch fire or explode under extreme conditions. Existing lithium-ion batteries rarely experience fire or explosion issues under extreme conditions such as overcharging, over-discharging, compression, impact, and heating. However, they do generate significant heat during high-power charging and discharging. Externally placed battery cases typically contain liquid coolers or cooling fans. However, in mines, where there is a high concentration of coal dust, simply using air circulation for cooling the battery pack can lead to coal dust entering the battery case and contaminating the battery electrodes. Furthermore, coal dust is conductive, posing a safety hazard if it gets into the battery pack. Yet, air circulation radiators are still necessary. Therefore, ensuring that coal dust does not impede battery cooling is a pressing issue that needs to be addressed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an emergency protection device for mining batteries, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an emergency protection device for mining batteries, comprising a battery box and a self-cleaning battery frame. The self-cleaning battery frame comprises multiple sets arranged vertically, with each set having the same distance between it and an air gap of the same height. The multiple sets of self-cleaning battery frames are located inside the battery box. The two ends of the self-cleaning battery frame are designated as air inlet and exhaust ends. A reversing box is provided between the air inlet of any self-cleaning battery frame and the exhaust end of the adjacent self-cleaning battery frame above it. The two are connected through the cavity inside the reversing box. The reversing box is fixedly connected to one end of the two self-cleaning battery frames. The air inlet of the uppermost self-cleaning battery frame and the exhaust end of the lowermost self-cleaning battery frame are both fixedly equipped with a single air box and connected to the cavity inside the single air box. A circulating air pipe is installed at the outer end of each of the two single air boxes. One end of the circulating air pipe is connected to the inside of the single air box, and the other end is located outside the battery box. The circulating air pipe is used to apply external cold air to the self-cleaning battery frame and cool it.

[0007] The self-cleaning battery frame includes an outer frame and a battery box. The outer frame is a rectangular frame structure with multiple sets of slide rails on its inner bottom wall. Each set of slide rails corresponds to a battery box. The battery box is suspended inside the outer frame, and its bottom does not contact the inner bottom wall of the outer frame. The battery box is slidably connected to the slide rails. Two stepping rails are fixed on the inner top wall of the outer frame. The output end of the stepping rails is equipped with a drive block that can move autonomously. A cleaning component is installed on both drive blocks. When the cleaning component moves along the stepping rails, it can clean the coal dust at the battery electrodes in conjunction with the cooling air.

[0008] Preferably, the battery box also includes an intermediate cover, inside which the self-cleaning battery frame, single air box, and commutator box are all located. The intermediate cover is fixed inside the battery box, and its rear end is closed. The inner end of the intermediate cover is fixed to the outer wall of the commutator box and the single air box. There is a dust channel between the intermediate cover and the commutator box, and there is a dust-absorbing layer between the intermediate cover and the bottom self-cleaning battery frame. The air slit is closed at one end near the commutator box, and the other end communicates with the internal space of the intermediate cover. An inspection strip is fixedly installed on the front of the air slit. The front end of the intermediate cover has an opening, and the inner ring of the opening corresponds to multiple self-cleaning battery frames. A sealing door is installed at the corresponding opening of the battery box to seal the opening.

[0009] Preferably, the front end of the outer frame corresponds to the opening, the rear end is sealed and fixed to the middle cover, and the inner bottom wall of the slide rail is provided with several downward penetrating ash holes. The ash holes are connected to the air gaps. The opening end of any air gap at the bottom of the outer frame is opposite to the airflow direction.

[0010] Preferably, both the air intake end and the exhaust end include upper and lower sets of jet pipes. The jet pipe at the air intake end is a ventilation structure, while the upper set of jet pipes at the exhaust end is a closed structure and the lower set of jet pipes is a ventilation structure.

[0011] Preferably, the battery box contains a storage battery, and two square tubes are fixed to the bottom of the battery box. The square tubes are parallel to the airflow direction and are mounted on the inner bottom wall of the outer frame, and are restricted to sliding back and forth by a slide rail.

[0012] Preferably, the cleaning assembly includes a fixed plate, an elastic plate, and a long-bristled brush. The fixed plate is fixed to two drive blocks. One end of the elastic plate is connected to the fixed plate, and the other end is fitted with the long-bristled brush. The elastic plate causes the long-bristled brush to contact the top of the battery.

[0013] Preferably, a rubber gasket is fixedly installed on the outer ring of the opening on the front side of the intermediate cover, and the sealing door cooperates with the rubber gasket to seal the opening.

[0014] Preferably, the inner wall of the reversing box has a chamfered corner at the end away from the outer frame, and the chamfered corner is located at the upper and lower ends of the inner wall of the reversing box. The height of the single air box is half the height of the reversing box.

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

[0016] 1. This emergency protection device for mining batteries, through the installation of a self-cleaning battery frame and intermediate cover, allows the airflow from the circulating air pipe to pass through multiple battery boxes via the inlet end and then exit from the exhaust end. Because square tubes are installed at the bottom of the battery boxes, with the inlet tube fully open and the exhaust tube only open at the bottom, the airflow entering the bottom of the self-cleaning battery frame is discharged at an angle, carrying coal dust which falls downwards. The coal dust falling onto the electrodes is removed by the cleaning components and falls to the inner bottom wall of the outer frame. With the airflow, the coal dust falling to the bottom enters the air gap through the ash outlet and falls into the ash layer via the ash channel. At this point, the coal dust is no longer affected by the airflow. Therefore, the circulating air carrying coal dust can be used to cool the battery, continuously clean the battery electrodes, and separate the coal dust, thus enabling the safe use of high-power energy storage equipment underground.

[0017] 2. The emergency protection device for the mining battery is equipped with a self-cleaning battery frame and a reversing box. When the circulating air enters, it carries away the hot air from each self-cleaning battery frame from top to bottom. When the battery is working and the temperature reaches the alarm value, the circulating air pipe circulates a large flow of cold air to quickly cool it down. The overall heat pressure will also cause the coal dust to settle.

[0018] 3. The emergency protection device for this mining battery is equipped with a battery box. Since the square tube at the bottom of the battery box can slide relative to the slide rail, when it is necessary to install the battery, simply open the closed door and pull out the battery box. Wiring and replacement are also very convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a structural separation diagram of the present invention;

[0021] Figure 3 This is a partial structural breakdown diagram of the present invention;

[0022] Figure 4 This is an exploded view of the self-cleaning battery frame of the present invention;

[0023] Figure 5 For the present invention Figure 4 Enlarged view of a local area in the middle;

[0024] Figure 6 This is a structural diagram of the self-cleaning battery frame and intermediate cover of the present invention;

[0025] Figure 7 For the present invention Figure 6 Enlarged view of a local area in the middle;

[0026] Figure 8 This is a structural diagram of the self-cleaning battery frame and commutator box of the present invention;

[0027] Figure 9 This is a structural diagram of the self-cleaning battery frame of the present invention;

[0028] Figure 10 For the present invention Figure 9 A magnified view of a local area.

[0029] In the diagram: 1. Battery box; 2. Self-cleaning battery frame; 201. Outer frame; 202. Battery compartment; 203. Slide rail; 204. Stepping rail; 205. Cleaning component; 2051. Fixing plate; 2052. Elastic plate; 2053. Long brush; 206. Lower ash hole; 207. Square tube; 3. Air gap; 4. Air inlet; 5. Exhaust end; 6. Reversing box; 7. Single air box; 8. Circulating air pipe; 9. Intermediate cover; 10. Ash channel; 11. Ash layer; 12. Inspection strip; 13. Opening; 14. Sealing door; 15. Jet pipe; 16. Rubber gasket. Detailed Implementation

[0030] The technical solutions of the embodiments of this application 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 this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0034] like Figure 1-10 As shown, an emergency protection device for a mining battery includes a battery box 1 and a self-cleaning battery frame 2. The self-cleaning battery frame 2 has multiple sets arranged vertically, with each set spaced equidistant from the others and equipped with air vents 3 at the same height. All sets of self-cleaning battery frames 2 are located within the battery box 1. Each self-cleaning battery frame 2 has an air inlet 4 and an exhaust 5 at both ends. A reversing box 6 is provided between the air inlet 4 of any one self-cleaning battery frame 2 and the exhaust 5 of the adjacent self-cleaning battery frame 2 above it. Through the cavity inside the commutator box 6, the commutator box 6 is fixedly connected to one end of the two self-cleaning battery frames 2. The air inlet 4 of the uppermost self-cleaning battery frame 2 and the exhaust 5 of the bottommost self-cleaning battery frame 2 are both fixedly installed with single air boxes 7 and are connected to the cavity inside the single air boxes 7. The outer ends of the two single air boxes 7 are each equipped with a circulating air pipe 8. One end of the circulating air pipe 8 is connected to the inside of the single air box 7, and the other end is located outside the battery box 1. The circulating air pipe 8 is used to apply external cold air to the self-cleaning battery frames 2 and cool them.

[0035] The self-cleaning battery frame 2 includes an outer frame 201 and a battery box 202. The outer frame 201 is a rectangular frame structure with multiple sets of slide rails 203 on its inner bottom wall. Each set of slide rails 203 corresponds to a battery box 202. The battery box 202 is suspended inside the outer frame 201, and its bottom does not contact the inner bottom wall of the outer frame 201. The battery box 202 is slidably connected to the slide rails 203. Two stepping rails 204 are fixed on the inner top wall of the outer frame 201. The output end of the stepping rails 204 is equipped with a drive block that can move autonomously. A cleaning component 205 is installed on both drive blocks. When the cleaning component 205 moves along the stepping rails 204, it can clean the coal dust at the battery electrodes in conjunction with the cooling air.

[0036] The battery box 1 can be directly installed underground and is suitable for applications such as underground lighting and other mining applications requiring 127V or 220V AC uninterrupted power supply. It is also suitable for hazardous environments in coal mines with explosive gases such as methane and coal dust. The front of the battery box 1 is equipped with a display panel, which can be used to observe parameters such as current, voltage, and remaining capacity during operation. The parameters of the internal battery can also be observed during charging. The battery box 1 is also equipped with sensors such as temperature and humidity sensors and hazardous gas alarms.

[0037] When the battery box 1 is located underground, the circulating air pipe 8 is connected to the blower. In order to cope with the complex dust environment underground, a cyclone separator, air filter, felt or other dust-proof filtering equipment can be installed at the air inlet of the blower to prevent dust from entering the battery box 1. However, when used for high temperature emergency protection, it is still impossible to prevent coal ash from entering the battery box 1. Therefore, it is necessary to separate the coal ash from the airflow to prevent coal ash from falling on the electrodes and causing danger. The control circuit of the blower is connected to the battery box 1. When the temperature sensor inside the battery box 1 detects high temperature and issues an alarm, its internal processing chip will send an electrical signal to the control circuit board of the blower, and then start the blower. The operating power of the blower can be controlled according to the temperature measurement of the temperature sensor inside the battery box 1.

[0038] Multiple battery boxes 202 are set inside an outer frame 201, and the battery boxes 202 can be arranged in multiple rows. The size of the outer frame 201 can be customized according to the actual downhole needs. When a large number of batteries need to be arranged, the battery boxes 202 can be arranged in an internal matrix. The batteries can be directly put into the battery boxes 202 and are not easy to fall out when they collide or shake. Because of the slide rail 203, the battery boxes 202 can be pulled when wiring. When arranging the batteries, the electrodes of each battery need to face the same direction and the electrodes need to face upward to cooperate with the cleaning component 205.

[0039] To separate and collect coal ash, an intermediate cover 9 is provided inside the battery box 1. The self-cleaning battery frame 2, the single gas box 7, and the commutator box 6 are all located inside the intermediate cover 9. The intermediate cover 9 is fixed inside the battery box 1. The rear end of the intermediate cover 9 is closed. The inner end of the intermediate cover 9 is fixed to the outer wall of the commutator box 6 and the single gas box 7. There is a ash channel 10 between the intermediate cover 9 and the commutator box 6. There is an ash-absorbing layer 11 between the intermediate cover 9 and the bottom self-cleaning battery frame 2. The air gap 3 is closed at one end near the commutator box 6, and the other end is connected to the internal space of the intermediate cover 9. A maintenance strip 12 is fixedly installed on the front of the air gap 3. The front end of the intermediate cover 9 has an opening 13. The inner ring of the opening 13 corresponds to multiple self-cleaning battery frames 2. A sealing door 14 is installed in the battery box 1 corresponding to the opening 13. The sealing door 14 is used to seal the opening 13.

[0040] The intermediate cover 9 is a wrap-around metal cover, which is fixed inside the battery box 1. The ash channel 10 and the air gap 3 occupy only a narrow area, much smaller than the space inside the commutator box 6. The inspection strip 12 is used to seal the air gap 3 during installation. When opened, the degree of coal ash accumulation in the air gap 3 can be observed, so that the ash can be cleaned manually. The battery box 202 can be removed from the opening 13 of the intermediate cover 9, and technicians can perform a series of electrical inspections such as wiring through the opening 13.

[0041] The front end of the outer frame 201 corresponds to the opening 13, and the rear end is sealed and fixed to the middle cover 9. The inner bottom wall of the slide rail 203 is provided with several downward penetrating ash holes 206. The ash holes 206 are connected to the air gaps 3. The opening end of the air gap 3 at the bottom of any outer frame 201 is opposite to the airflow direction.

[0042] The ash discharge holes 206 are located in the slide rails 203, and multiple sets of ash discharge holes 206 are provided in a single slide rail 203. The number of ash discharge holes 206 is set according to the airflow rate to prevent airflow from passing through the ash discharge holes 206 and affecting the cooling of the battery box 202 inside the outer frame 201. When the airflow flows within an outer frame 201 and the area narrows, the coal dust it carries will fall downwards. The fallen coal dust will accumulate at the bottom of the battery and at the inner bottom wall of the outer frame 201. Because the inner bottom wall is provided with slide rails 203, the slide rails 203 can intercept the coal dust as the airflow passes through. Under the action of a portion of the airflow, excess coal dust will fall from the lower ash hole 206 into the air gap 3. In this process, only a very small amount of airflow is used to discharge the coal dust. Since the opening end of the air gap 3 is opposite to the airflow direction, and the coal dust also has a certain weight, the airflow is difficult to produce a siphon effect on the air gap 3. Therefore, the falling coal dust will gradually enter the air gap 3 until it falls from the ash channel 10 into the ash layer 11. Both the air inlet end 4 and the exhaust end 5 include two sets of jet pipes 15, one upper and one lower. The jet pipe 15 of the air inlet end 4 is a ventilation structure, and the upper set of jet pipes 15 of the exhaust end 5 is a closed structure, while the lower set of jet pipes 15 is a ventilation structure.

[0043] Air intake passes through all the jet pipes 15, while exhaust only passes through the bottom jet pipe 15. Therefore, when the airflow passes through an outer frame 201, it fills the outer frame 201 before being discharged. As a result, the coal ash it carries will only occupy a small portion of the airflow before being discharged through the lower ash hole 206. The closed and open states of the jet pipe 15 are achieved using a threaded plug. This plug can be removed or partially repositioned according to the actual operating conditions. The closed state of the jet pipe 15 at the air intake end 4 and the exhaust end 5 can also be switched to cope with various blower cooling situations.

[0044] The battery box 202 contains a storage battery. Two square tubes 207 are fixed to the bottom of the battery box 202. The square tubes 207 are parallel to the airflow direction. The square tubes 207 are mounted on the inner bottom wall of the outer frame 201 and are restricted to sliding back and forth by the slide rail 203.

[0045] Parts of the battery box 202 are made of aluminum alloy, while the rest are injection molded. Its size is compatible with the size of most single batteries in the existing technology. The battery is not easy to fall out when it is put into the battery box 202 and is placed stably. The square tube 07 is an aluminum alloy tube, which can conduct heat and has a certain supporting strength.

[0046] The cleaning assembly 205 includes a fixed plate 2051, an elastic plate 2052, and a long-bristled brush 2053. The fixed plate 2051 is fixed to two drive blocks. One end of the elastic plate 2052 is connected to the fixed plate 2051, and the other end is equipped with the long-bristled brush 2053. The elastic plate 2052 causes the long-bristled brush 2053 to contact the top of the battery.

[0047] The drive block contains a motor that works with the stepper track 204, allowing it to move freely on the stepper track 204. The long brush 2053 contacts the electrode under the action of the elastic plate 2052. When it folds back, the long brush 2053 can change direction, and the elastic plate 2052 can perform the above-mentioned functions.

[0048] A rubber gasket 16 is fixedly installed on the front of the intermediate cover 9, which is located on the outer ring of the opening 13. The sealing door 14 cooperates with the rubber gasket 16 to seal the opening.

[0049] When the sealing door 14 is closed, the sealing door engages with the rubber gasket 16 to prevent air leakage from the sealing door 14.

[0050] The inner wall of the reversing box 6 has a chamfered corner at the end away from the outer frame 201. The chamfered corner is located at the upper and lower ends of the inner wall of the reversing box 6. The height of the single air box 7 is half the height of the reversing box 6.

[0051] In use, the battery box 1 is installed underground for various functions such as underground lighting. The battery itself can also be charged underground. During high-power charging and discharging, the battery generates a significant amount of heat inside the battery box 1. Because the battery is enclosed in the battery box 1 to prevent collisions underground, the heat cannot be directly dissipated from the battery box 1. Therefore, a circulating air pipe 8 is used to connect to an external blower. The blower can also be connected to a cyclone separator or air filter for pre-treatment. During small-scale daily use, the internal temperature rise is unknown. Clearly, the recirculating air pipe 8 can operate without recirculating airflow, reducing internal dust accumulation. When the recirculating air pipe 8 is needed, the external airflow brought by the recirculating air pipe 8 first enters the first self-cleaning battery frame 2 through the single air box 7. The airflow flows within the outer frame 201 and passes over the electrodes and bottom of the battery box 202. Because a square tube 207 is installed at the bottom, it does not affect the airflow. The airflow can pass through the gaps between the batteries. Due to the different positions of the jet pipes 15 at the intake end 4 and the exhaust end 5, the incoming air gradually slopes downwards before being discharged. Therefore, the cold air flowing from top to bottom and gradually narrowing the area can expel all the heat at once. However, during the heat removal process in the well, some coal dust will inevitably be carried away. When the coal dust and cold air cool the battery, they will accumulate on the electrodes. Therefore, the cleaning component 205, operating cyclically in conjunction with the airflow, can clean the electrodes to prevent coal dust from conducting electricity and causing internal short circuits and accidents. When the airflow flows within an outer frame 201 and narrows the area, the coal dust it carries will fall downwards and accumulate at the bottom of the battery. Located on the inner bottom wall of the outer frame 201, the slide rail 203 is installed on its inner bottom wall. Therefore, the slide rail 203 can cut off the coal powder when the airflow passes through it. Under the action of a part of the airflow, the excess coal powder will fall from the lower ash hole 206 into the air gap 3. In this process, only a very small amount of airflow is used to discharge the coal powder. Since the opening end of the air gap 3 is opposite to the airflow direction, and the coal ash also has a certain weight, the airflow is difficult to produce a siphon effect on the air gap 3. Therefore, the falling coal ash will gradually enter the air gap 3 until it falls from the ash channel 10 into the ash layer 11.

[0052] Moreover, during maintenance or wiring, it is only necessary to open the closed door 14. After opening the closed door 14, any battery box 202 can be pulled out from the opening 13. Since the square tube 207 at the bottom is slidably connected to the slide rail 203, it is very easy to pull out, and the battery can be directly pulled out from the battery box 202.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0054] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An emergency protection device for mining batteries, comprising a battery box, characterized in that: It also includes self-cleaning battery frames, which are arranged in multiple groups distributed vertically, with each group having the same distance between them and air gaps of the same height. All groups of self-cleaning battery frames are located inside the battery box. The two ends of the self-cleaning battery frames are designated as air inlets and exhaust outlets. A reversing box is provided between the air inlet of any self-cleaning battery frame and the exhaust outlet of the adjacent self-cleaning battery frame above it. The two are connected through the cavity inside the reversing box. The reversing box is fixedly connected to one end of the two self-cleaning battery frames. The air inlet of the uppermost self-cleaning battery frame and the exhaust outlet of the bottommost self-cleaning battery frame are both fixedly installed with single air boxes and connected to the cavity inside the single air boxes. A circulating air pipe is installed at the outer end of each of the two single air boxes. One end of the circulating air pipe is connected to the inside of the single air box, and the other end is outside the battery box. The circulating air pipe is used to apply external cold air to the self-cleaning battery frames and cool them. The self-cleaning battery frame includes an outer frame and a battery box. The outer frame is a rectangular frame structure with multiple sets of slide rails on its inner bottom wall. Each set of slide rails corresponds to a battery box. The battery box is suspended inside the outer frame and its bottom does not contact the inner bottom wall of the outer frame. The battery box is slidably connected to the slide rails. Two stepping rails are fixed on the inner top wall of the outer frame. The output end of the stepping rails is equipped with a drive block that can move autonomously. A cleaning component is installed on both drive blocks. When the cleaning component moves along the stepping rails, it can clean the coal dust at the battery electrodes in conjunction with the cooling air. The battery box is also equipped with an intermediate cover. The self-cleaning battery frame, single air box, and commutator box are all located inside the intermediate cover. The intermediate cover is fixed inside the battery box. The rear end of the intermediate cover is closed. The inner end of the intermediate cover is fixed to the outer wall of the commutator box and the single air box. There is a ash channel between the intermediate cover and the commutator box. There is a dust-absorbing layer between the intermediate cover and the bottom self-cleaning battery frame. The dust-absorbing layer is connected to the outside. The air gap is closed at one end near the commutator box and connected to the internal space of the intermediate cover at the other end. An inspection strip is fixedly installed on the front of the air gap. The front end of the intermediate cover has an opening. The inner ring of the opening corresponds to multiple self-cleaning battery frames. A sealing door is installed at the corresponding opening of the battery box. The sealing door is used to seal the opening. The front end of the outer frame has an opening, and the rear end is sealed and fixed to the middle cover. The inner bottom wall of the slide rail is provided with several downward-penetrating ash holes, which are connected to the air gaps. The opening end of any air gap at the bottom of the outer frame is opposite to the airflow direction. Both the air intake end and the exhaust end include two sets of jet pipes, upper and lower. The jet pipes at the air intake end are ventilation structures, while the upper set of jet pipes at the exhaust end is a closed structure and the lower set of jet pipes is a ventilation structure. The battery box contains a storage battery. Two square tubes are fixed to the bottom of the battery box. The square tubes are parallel to the airflow direction and are mounted on the inner bottom wall of the outer frame. They are restricted from sliding back and forth by a slide rail.

2. The emergency protection device for mining batteries according to claim 1, characterized in that: The cleaning assembly includes a fixed plate, an elastic plate, and a long-bristled brush. The fixed plate is fixed to two drive blocks. One end of the elastic plate is connected to the fixed plate, and the other end is fitted with the long-bristled brush. The elastic plate causes the long-bristled brush to contact the top of the battery.

3. The emergency protection device for mining batteries according to claim 2, characterized in that: A rubber gasket is fixedly installed on the outer ring of the opening on the front of the intermediate cover. The sealing door cooperates with the rubber gasket to seal the opening.

4. The emergency protection device for mining batteries according to claim 3, characterized in that: The inner wall of the reversing box has a chamfered corner at the end away from the outer frame. The chamfered corner is located at the upper and lower ends of the inner wall of the reversing box, and the height of the single air box is half the height of the reversing box.

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