Explosion-proof breather valve and battery box

Abstract

The utility model discloses a kind of explosion-proof breather valve and battery box, it is related to explosion-proof valve technical field, wherein, explosion-proof breather valve includes valve main body, cover, movable frame and adjusting piece, valve main body is used to be fixed in the lateral wall of battery box, and is equipped with air vent;Cover movable cover is equipped in valve main body, and clearance space is formed between valve main body with it;Movable frame is movably arranged in valve main body and cover connection, and can cover air vent, first air hole is equipped in the end of movable frame close to valve main body, and the side of movable frame away from valve main body is equipped with air permeable membrane;Adjusting piece movably arranged in cover, and form air passage with clearance space and first air hole communication between movable frame, air permeable membrane is located in air passage, adjusting piece is configured to be pressed when closing or opening air passage. The present scheme aims to provide a kind of explosion-proof breather valve capable of meeting the needs of different application scenarios.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof valve technology, and in particular to an explosion-proof vent valve and a battery box. Background Technology

[0002] With the rapid development of industries such as new energy vehicles, the application of new energy lithium batteries and ternary batteries is becoming increasingly widespread. To ensure the safety and reliability of batteries, new energy battery enclosures typically adopt a fully sealed design to meet the IP67 safety standard. However, batteries generate gas during use, and if this gas is not released in time, it can lead to increased pressure inside the enclosure, posing a safety hazard. Therefore, explosion-proof vent valves have become a key component for maintaining a safe pressure state inside the battery enclosure.

[0003] In related technologies, explosion-proof vent valves generally have a normal state and a pressure relief state. In the normal state, when the air pressure inside the battery pack is lower than the burst point, the air pressure is regulated by the guide shaft, the main body through-hole, the vent membrane, and the small hole in the top cover. The vent membrane serves to provide waterproofing and ventilation. In the pressure relief state, when the air pressure inside the battery pack is higher than the burst point, the air pressure pushes the guide shaft to move, the spring is compressed, the fixing seat separates from the main body, forming a gap, and the air pressure is quickly discharged through the gap, thus achieving pressure relief.

[0004] However, in practical applications, the structures and working environments of different battery enclosures vary, leading to different requirements for explosion-proof vent valves. On the one hand, traditional explosion-proof vent valves regulate internal and external pressure through a vent membrane under normal conditions, making them suitable for most scenarios requiring pressure balance between the inside and outside of the enclosure. On the other hand, some battery enclosures, under specific operating conditions, only need to rapidly release pressure when it abnormally rises, without needing to maintain pressure balance. For example, some specially designed battery enclosures only need to rapidly release pressure when it abnormally rises to ensure safety under certain specific operating conditions. In such cases, traditional explosion-proof vent valves, due to limitations in their structure and working principle, cannot meet these special requirements, thus restricting their applicability.

[0005] Therefore, there is an urgent need for a new type of explosion-proof vent valve that can quickly release pressure only when the pressure inside the battery box rises abnormally under specific working conditions, while avoiding unnecessary venting adjustments during normal operation, so as to better adapt to the needs of different battery boxes and ensure the safe operation of the battery box. Utility Model Content

[0006] The main purpose of this utility model is to propose an explosion-proof vent valve and a battery box, aiming to provide an explosion-proof vent valve that can meet the needs of different application scenarios.

[0007] To achieve the above objectives, the explosion-proof vent valve proposed in this utility model includes:

[0008] The valve body is used to fix the valve to the side wall of the battery box and has a vent.

[0009] A cover body, which is movably mounted on the valve body and forms a gap space between the cover body and the valve body;

[0010] A movable frame, movably connected to the valve body and the cover, capable of covering the vent, has a first vent hole at one end near the valve body and a vent membrane on the side of the movable frame facing away from the valve body; and

[0011] An adjusting member is movably inserted through the cover and forms a ventilated channel with the movable frame, which communicates with the gap space and the first vent hole. The ventilated membrane is located within the ventilated channel, and the adjusting member is configured to close or open the ventilated channel when pressed.

[0012] In one embodiment, the adjusting element includes a rotary switch and a membrane skeleton. The rotary switch is exposed in the cover and detachably connected to the cover. The membrane skeleton is movably inserted through the cover and connected to the rotary switch. The membrane skeleton is elastically connected to the cover and cooperates with the movable frame to close or open the ventilation channel.

[0013] In one embodiment, a limiting protrusion is formed on the side of the rotary switch near the cover, and a limiting groove is formed on the side of the cover near the rotary switch, wherein the limiting protrusion can be inserted into the limiting groove.

[0014] In one embodiment, the membrane skeleton has a sealing portion and a connecting portion, the connecting portion being connected to the rotary switch, and the sealing portion being used to cooperate with the movable frame to close or open the ventilation channel; the adjusting member includes a spring, the spring being sleeved on the connecting portion and located between the cover and the sealing portion.

[0015] In one embodiment, the rotary switch is detachably connected to the connecting portion.

[0016] In one embodiment, the explosion-proof vent valve includes a first sealing ring, which is disposed on the side of the movable frame facing the membrane skeleton and exposed on the membrane skeleton. The sealing part cooperates with the first sealing ring to close the venting channel.

[0017] In one embodiment, the explosion-proof vent valve includes a second sealing ring, which is disposed on the side of the valve body facing the movable frame and exposed on the valve body, and the second sealing ring is located between the valve body and the movable frame.

[0018] In one embodiment, the explosion-proof vent valve includes a guide rod that is movably inserted through the valve body and connected to the movable frame, and has a second vent hole communicating with the first vent hole. The guide rod is elastically connected to the valve body.

[0019] In one embodiment, the explosion-proof vent valve includes a moisture-proof cover, which is sleeved on the guide rod and connected to the valve body, and an air intake channel is formed between the moisture-proof cover and the guide rod; and / or

[0020] The explosion-proof vent valve includes a one-way valve disc, which is disposed in the second vent hole and is used to control the one-way flow of gas from the battery box to the first vent hole.

[0021] This utility model also proposes a battery box, including the explosion-proof vent valve as described above.

[0022] In this technical solution, when the regulating component is in the closed state, the venting channel is sealed, so the explosion-proof venting valve does not maintain the normal state of pressure balance inside and outside the battery box. In this state, when the pressure inside the battery box rises abnormally, the air pressure will push the movable frame towards the regulating component. Since the venting channel is sealed, a certain gap will be formed between the movable frame and the valve body. Gas can be discharged through this gap and the gap space. This design allows a certain degree of pressure relief function to be achieved even when the regulating component is closed, ensuring the safety of the battery box. In this state, the explosion-proof venting valve is in an explosion-proof state, mainly relying on the gap between the movable frame and the valve body and the gap space to achieve pressure relief, preventing the battery box from being damaged due to excessive pressure. When the regulating component is in the open position, the venting channel is open, allowing the explosion-proof vent valve to operate in both normal and depressurization states. In the normal state, when the air pressure inside the battery compartment is lower than the burst point, the air pressure regulates the pressure inside and outside the battery compartment through the first vent, the vent membrane, the venting channel, and the gap space. The vent membrane acts as a waterproof and breathable barrier, ensuring pressure balance inside and outside the battery compartment. In the depressurization state, when the air pressure inside the battery compartment is higher than the burst point, the air pressure through the first vent, the vent membrane, the venting channel, and the gap space can no longer maintain pressure balance. Most of the air pressure passes through the vent, pushing the movable frame away from the valve body. The movable frame no longer covers the vent, and most of the gas is quickly discharged through the vent, the gap between the movable frame and the valve body, and the gap space, achieving rapid depressurization and protecting the battery compartment from damage. Through this design, this explosion-proof vent valve can flexibly switch between operating states according to actual needs. When the regulator is closed, although the normal state of pressure balance inside and outside the battery box is not maintained, a certain degree of pressure relief can still be achieved through the gap between the movable frame and the valve body and the gap space to ensure the safety of the battery box. When the regulator is open, the explosion-proof vent valve can work normally, which can both regulate pressure balance and quickly relieve pressure to meet the needs of different application scenarios and improve the safety and reliability of the battery box. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 An exploded structural diagram of an embodiment of the explosion-proof vent valve provided by this utility model;

[0025] Figure 2 A cross-sectional view of the first embodiment of the explosion-proof vent valve provided for this utility model;

[0026] Figure 3 A cross-sectional view of a second embodiment of the explosion-proof vent valve provided for this utility model;

[0027] Figure 4 A cross-sectional view of the third embodiment of the explosion-proof vent valve of this utility model is provided;

[0028] Figure 5 A cross-sectional view of the fourth embodiment of the explosion-proof vent valve provided by this utility model.

[0029] Explanation of icon numbers:

[0030] 100. Explosion-proof vent valve; 1. Valve body; 11. Vent port; 2. Cover; 21. Gap space; 22. Limiting groove; 3. Movable frame; 31. First vent hole; 4. Adjusting component; 41. Vent channel; 42. Knob switch; 421. Limiting protrusion; 43. Membrane skeleton; 431. Sealing part; 432. Connecting part; 44. Spring; 5. First sealing ring; 6. Second sealing ring; 7. Guide rod; 71. Second vent hole; 8. Moisture-proof cover; 81. Air inlet channel; 9. One-way valve disc.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are 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 with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] This utility model proposes an explosion-proof vent valve 100.

[0036] Please see Figure 1 , Figure 3 , Figure 4 as well as Figure 5 In one embodiment of this utility model, the explosion-proof vent valve 100 includes a valve body 1, a cover 2, a movable frame 3, and an adjusting member 4. The valve body 1 is fixed to the side wall of the battery box and has a vent 11. The cover 2 is movably mounted on the valve body 1, and a gap space 21 is formed between the cover 2 and the valve body 1. The movable frame 3 is movably mounted through the valve body 1 and connected to the cover 2, and can cover the vent 11. A first vent hole 31 is formed at one end of the movable frame 3 near the valve body 1, and a ventilated membrane is provided on the side of the movable frame 3 facing away from the valve body 1. The adjusting member 4 is movably mounted through the cover 2, and a ventilated channel 41 is formed between the adjusting member 4 and the movable frame 3, communicating with the gap space 21 and the first vent hole 31. The ventilated membrane is located in the ventilated channel 41. The adjusting member 4 is configured to close or open the ventilated channel 41 when pressed.

[0037] In this technical solution, when the regulating component 4 is in the closed state, the venting channel 41 is sealed, therefore the explosion-proof venting valve 100 does not maintain the normal state of pressure balance inside and outside the battery box; in this state, please refer to Figure 5The airflow path, indicated by the dashed line, is such that when the pressure inside the battery box rises abnormally, the air pressure pushes the movable frame 3 towards the adjusting component 4. Because the venting channel 41 is closed, a gap is formed between the movable frame 3 and the valve body 1, allowing gas to escape through this gap and the gap space 21. This design allows for a certain degree of pressure relief even when the adjusting component 4 is closed, ensuring the safety of the battery box. In this state, the explosion-proof vent valve 100 is in an explosion-proof state, relying mainly on the gap between the movable frame 3 and the valve body 1 and the gap space 21 to achieve pressure relief, preventing damage to the battery box due to excessive pressure. When the adjusting component 4 is in the open state, the venting channel 41 is opened, and the explosion-proof vent valve 100 can be in both normal and pressure-relief states. In the normal state, please refer to... Figure 3 The airflow path, indicated by the dashed line, regulates the pressure inside and outside the battery box when the internal pressure is lower than the burst point. This pressure is achieved through the first vent 31, the breathable membrane, the breathable channel 41, and the gap space 21. The breathable membrane serves to ensure waterproofing and ventilation, maintaining pressure balance inside and outside the battery box. In the depressurized state, please refer to... Figure 5 The airflow path marked by the dashed line indicates that when the air pressure inside the battery box exceeds the burst point, the air pressure, through the first vent 31, the vent membrane, the vent channel 41, and the gap space 21, can no longer maintain the air pressure balance inside and outside the battery box. Most of the air pressure passes through the vent 11, pushing the movable frame 3 away from the valve body 1. The movable frame 3 no longer covers the vent 11, and most of the gas is quickly discharged through the vent 11, the gap between the movable frame 3 and the valve body 1, and the gap space 21, achieving rapid pressure relief and protecting the battery box from damage. Through this design, the explosion-proof vent valve 100 can flexibly switch its working state according to actual needs. When the adjusting component 4 is closed, although the normal state of air pressure balance inside and outside the battery box is not maintained, a certain degree of pressure relief can still be achieved through the gap between the movable frame 3 and the valve body 1 and the gap space 21, ensuring the safety of the battery box. When the adjusting component 4 is open, the explosion-proof vent valve 100 can work normally, both regulating pressure balance and quickly releasing pressure, meeting the needs of different application scenarios and improving the safety and reliability of the battery box.

[0038] The valve body 1 is fixed to the side wall of the battery box and has a vent 11 inside for rapid pressure relief in case of abnormal pressure rise. The cover 2 is movably mounted on the valve body 1, forming a gap 21 between them. This gap 21 provides a channel for gas flow, ensuring smooth gas passage when needed. The movable frame 3 has a first vent 31 and is connected to the cover 2. The movable frame 3 is located between the valve body 1 and the cover 2 and can cover the vent 11. The movable frame 3 faces away from the valve body 1. A breathable membrane is provided on the side. The first vent 31 is used to regulate the air pressure inside and outside the battery box under normal conditions. The breathable membrane serves to be waterproof and breathable under normal conditions, allowing gas to pass through while preventing liquid from entering. The breathable membrane is located within the breathable channel 41, ensuring that gas can be regulated through the breathable membrane. The adjusting component 4 is movably inserted through the cover 2 and forms a breathable channel 41 communicating with the gap space 21 between it and the movable frame 3. The adjusting component 4 is used to control the opening or closing of the breathable channel 41, thereby realizing the switching of the explosion-proof breathable valve 100 in different states. The breathable membrane is usually made of EPTFE (expanded polytetrafluoroethylene) material, which allows gas molecules to pass through while preventing liquids and dust from passing through, thus achieving the purpose of waterproofing and breathability.

[0039] Specifically, please refer to Figure 2In one embodiment, the adjusting member 4 includes a rotary switch 42 and a membrane skeleton 43. The rotary switch 42 is exposed in the cover 2 and is detachably connected to the cover 2. The membrane skeleton 43 is movably inserted through the cover 2 and connected to the rotary switch 42. The membrane skeleton 43 is elastically connected to the cover 2 and cooperates with the movable frame 3 to close or open the ventilation channel 41. When the rotary switch 42 is pressed, it moves the membrane frame 43 downwards, connecting the rotary switch 42 to the cover 2. The membrane frame 43 fits tightly against the movable frame 3, sealing the venting channel 41. At this time, the venting channel 41 is completely closed, and gas cannot flow through it. In this state, the explosion-proof venting valve 100 is not in normal condition. When the pressure inside the battery box rises abnormally, the air pressure will push the movable frame 3 toward the rotary switch 42. Since the venting channel 41 is closed, a certain gap will be formed between the movable frame 3 and the valve body 1 under the pressure. Gas can be discharged through this gap and the gap space 21. This design allows for a certain degree of pressure relief even when the adjusting component 4 is closed, ensuring the safety of the battery box. In this state, the explosion-proof venting valve 100 is in an explosion-proof state, mainly relying on the gap between the movable frame 3 and the valve body 1 and the gap space 21 to achieve pressure relief, preventing the battery box from being damaged due to excessive pressure. When the knob switch 42 is disengaged from the cover 2, due to the elastic connection between the membrane skeleton 43 and the cover 2, the membrane skeleton 43 will spring back to its original position and separate from the movable frame 3, thereby opening the venting channel 41. At this time, the venting channel 41 is fully opened, and gas can flow freely through the venting channel 41. In this state, the explosion-proof venting valve 100 can be in normal state and pressure relief state. When the air pressure inside the battery box is less than the burst point, the air pressure adjusts the pressure inside and outside the battery box through the first vent 31, the venting membrane, the venting channel 41, and the gap space 21. The venting membrane plays a role in waterproofing and ventilating, ensuring the pressure balance inside and outside the battery box. When the air pressure inside the battery box is greater than the burst point, the air pressure pushes the movable frame 3 to move away from the valve body 1. The movable frame 3 no longer covers the vent 11, and most of the gas is quickly discharged through the vent 11, the gap between the movable frame 3 and the valve body 1, and the gap space 21, achieving rapid pressure relief and protecting the battery box from damage. The knob switch 42 is detachably connected to the cover 2, which can be achieved by setting a limiting protrusion 421 and a limiting groove 22, or by setting a magnetic part. This solution does not limit this.

[0040] To achieve a detachable connection between the rotary switch 42 and the cover 2, in one embodiment, a limiting protrusion 421 is formed on the side of the rotary switch 42 near the cover 2, and a limiting groove 22 is formed on the side of the cover 2 near the rotary switch 42. The limiting protrusion 421 can be inserted into the limiting groove 22. Please refer to [link / reference]. Figure 5When the rotary switch 42 is pressed, the limiting protrusion 421 inserts into the limiting groove 22, and the rotary switch 42 is tightly connected to the cover 2. At this time, the adjusting part 4 is in the closed state, and the ventilation channel 41 is completely sealed. This design ensures that the rotary switch 42 will not be accidentally loosened due to external vibration or misoperation when it is in the closed state, thereby ensuring the sealing of the ventilation channel 41; please refer to Figure 3 and Figure 4 When the rotary switch 42 is lifted, the limiting protrusion 421 disengages from the limiting groove 22, and the rotary switch 42 separates from the cover 2. At this time, the adjusting component 4 is in the open state, and the venting channel 41 is fully opened. This design allows users to switch the working state of the explosion-proof venting valve 100 by simply pressing and lifting. The design of the limiting protrusion 421 and the limiting groove 22 not only provides a reliable fixing function but also increases the stability of the structure. This mechanical connection method is more reliable than a simple friction connection and can withstand a certain amount of external force without easily loosening. Users can switch the working state of the explosion-proof venting valve 100 by simply pressing and lifting, which is intuitive and convenient. The design of the limiting protrusion 421 and the limiting groove 22 ensures the stability of the rotary switch 42 in the closed state, preventing the venting channel 41 from being accidentally opened due to accidental loosening. This design does not require additional fixing devices (such as screws), making the entire explosion-proof venting valve 100 structure more compact and saving space.

[0041] To open and close the ventilation channel 41, please refer to [link / reference]. Figure 2In one embodiment, the membrane skeleton 43 has a sealing part 431 and a connecting part 432. The connecting part 432 is connected to the rotary switch 42. The sealing part 431 is used to cooperate with the movable frame 3 to close or open the ventilation channel 41. The adjusting member 4 includes a spring 44, which is sleeved on the connecting part 432 and located between the cover 2 and the sealing part 431. When the rotary switch 42 is pressed, the sealing part 431 fits tightly against the movable frame 3, completely sealing the ventilation channel 41; when the rotary switch 42 is lifted, the sealing part 431 separates from the movable frame 3, and the ventilation channel 41 is opened; the connecting part 432 is connected to the rotary switch 42, transmitting the pressing and lifting actions of the rotary switch 42 to the membrane frame 43; the spring 44 is located between the cover 2 and the sealing part 431. When the rotary switch 42 is pressed, the spring 44 is compressed; when the rotary switch 42 is lifted, the spring 44 returns to its original state, pushing the membrane frame 43 back to its original position, thereby opening the ventilation channel 41; the spring 44 can provide a certain amount of cushioning to avoid excessive impact force on the membrane frame 43 and the movable frame 3 during operation of the rotary switch 42. The tight fit between the sealing part 431 and the movable frame 3 ensures that the ventilation channel 41 is completely sealed when closed, preventing gas leakage. The connection between the connecting part 432 and the rotary switch 42 allows the user to switch the ventilation channel 41 open and closed with simple pressing and lifting actions. The design of the spring 44 not only provides a reliable reset function, but also increases the stability and reliability of operation, avoiding accidental opening or closing of the ventilation channel 41 due to external force or misoperation. The combined design of the spring 44 and the membrane skeleton 43 makes the structure of the entire adjusting component 4 more compact, saves space, and improves the overall mechanical performance.

[0042] In one embodiment, the rotary switch 42 is detachably connected to the connecting part 432. The rotary switch 42 and the connecting part 432 can be connected by threads or by snap-fit; this design does not limit this. The detachable connection design makes replacing the rotary switch 42 more convenient, reducing maintenance time and costs. In the event of equipment failure, the rotary switch 42 can be quickly replaced to restore normal equipment function. The detachable design also reduces the possibility of the entire equipment being scrapped due to damage to the rotary switch 42, thus lowering the total lifecycle cost of the equipment.

[0043] To improve the sealing performance of the explosion-proof vent valve 100, please refer to [link / reference needed]. Figure 2In one embodiment, the explosion-proof vent valve 100 includes a first sealing ring 5, which is located on the side of the movable frame 3 facing the membrane skeleton 43 and exposed on the membrane skeleton 43. The sealing part 431 cooperates with the first sealing ring 5 to seal the venting channel 41. When the adjusting member 4 is in the closed state, the knob switch 42 is pressed, and the sealing part 431 of the membrane skeleton 43 fits tightly with the first sealing ring 5 on the movable frame 3. The first sealing ring 5, through its elastic deformation, fills the tiny gap between the sealing part 431 and the movable frame 3, thereby achieving a complete seal of the venting channel 41 and preventing gas leakage. This sealing method is more reliable than simple mechanical contact sealing and can effectively prevent poor sealing caused by manufacturing errors or wear. The first sealing ring 5 can protect the contact surface between the movable frame 3 and the membrane skeleton 43, reducing damage caused by friction and wear. Since the sealing ring is usually made of elastic material (such as rubber or silicone), it can absorb mechanical shock to a certain extent and extend the service life of the component. The first sealing ring 5 can be selected according to different working pressure and temperature conditions to adapt to different application scenarios. For example, in high temperature environment, high temperature resistant sealing ring material can be used, and in high pressure environment, high elastic sealing ring material can be used. The introduction of the first sealing ring 5 significantly improves the sealing performance of the venting channel 41, ensuring that the venting channel 41 is completely sealed when the adjusting element 4 is closed, preventing gas leakage. By selecting a suitable sealing ring material, it can adapt to different working environments, such as high temperature, high pressure, and corrosive gases. The elastic material of the sealing ring can reduce the direct friction between the movable frame 3 and the membrane skeleton 43, thereby reducing component wear. The sealing ring can absorb a certain amount of mechanical impact, reducing component damage caused by external forces. If the sealing ring ages or is damaged due to long-term use, the sealing ring can be replaced separately without replacing the entire movable frame 3 or membrane skeleton 43. The replacement cost of the sealing ring is relatively low and the operation is simple, reducing the maintenance cost of the equipment.

[0044] Please see Figure 2In one embodiment, the explosion-proof vent valve 100 includes a second sealing ring 6. The second sealing ring 6 is disposed on the side of the valve body 1 facing the movable frame 3 and is exposed on the valve body 1. The second sealing ring 6 is located between the valve body 1 and the movable frame 3. When the movable frame 3 contacts the valve body 1, the second sealing ring 6 fills the tiny gap between the valve body 1 and the movable frame 3 through its elastic deformation, thereby achieving a seal. Under normal conditions, the second sealing ring 6 can prevent gas leakage and ensure the balance of air pressure inside and outside the battery box. The second sealing ring 6 can protect the contact surface between the valve body 1 and the movable frame 3, reducing damage caused by friction and wear. Since the sealing ring is usually made of elastic material (such as rubber or silicone), it can absorb mechanical shock to a certain extent and extend the service life of the component. The second sealing ring 6 can be selected according to different working pressure and temperature conditions to adapt to different application scenarios. For example, in high-temperature environments, high-temperature resistant sealing ring materials can be used, and in high-pressure environments, highly elastic sealing ring materials can be used. The introduction of the second sealing ring 6 significantly improves the sealing performance between the valve body 1 and the movable frame 3, ensuring effective prevention of gas leakage under normal conditions. By selecting a suitable sealing ring material, it can adapt to different working environments, such as high temperature, high pressure, and corrosive gases. The elastic material of the sealing ring can reduce the direct friction between the valve body 1 and the movable frame 3, thereby reducing component wear. The sealing ring can absorb a certain amount of mechanical impact, reducing component damage caused by external forces. If the sealing ring ages or is damaged due to long-term use, it can be replaced separately without replacing the entire valve body 1 or movable frame 3. The replacement cost of the sealing ring is relatively low and the operation is simple, reducing the maintenance cost of the equipment. The first sealing ring 5 is located on the side of the movable frame 3 facing the membrane skeleton 43, and is used to cooperate with the sealing part 431 of the membrane skeleton 43 to seal the venting channel 41; the second sealing ring 6 is located on the side of the valve body 1 facing the movable frame 3, and is used to provide a seal when the movable frame 3 contacts the valve body 1; through the synergistic effect of the first sealing ring 5 and the second sealing ring 6, the explosion-proof venting valve 100 can maintain good sealing performance under different working conditions: in the closed state, the first sealing ring 5 cooperates with the sealing part 431 of the membrane skeleton 43 to completely seal the venting channel 41; in the normal state, the second sealing ring 6 ensures the seal between the valve body 1 and the movable frame 3 to prevent gas leakage.

[0045] Please see Figure 2In one embodiment, the explosion-proof vent valve 100 includes a guide rod 7, which is movably inserted through the valve body 1 and connected to the movable frame 3. The guide rod 7 has a second vent hole 71 communicating with the first vent hole 31. The guide rod 7 is elastically connected to the valve body 1. The guide rod 7 ensures that the movable frame 3 maintains linear movement during operation, preventing poor sealing or damage due to skewness or jamming. It also allows the movable frame 3 to move smoothly under air pressure. The second vent hole 71 communicates with the first vent hole 31, providing a stable flow path for the gas. Under normal conditions, gas can enter the second vent hole 71 through the first vent hole 31, and then regulate the air pressure inside and outside the battery box through the venting channel 41 and the gap space 21. Under depressurization conditions, gas can be discharged not only through the second vent 71, the first vent 31, the vent channel 41, and the gap space 21, but also by the movable frame 3 moving away from the valve body 1 under the action of air pressure, creating a gap between the valve body 1 and the movable frame 3. Most of the gas is discharged through this gap and the gap space. The elastic connection (such as spring 44) between the guide rod 7 and the valve body 1 provides a certain buffering and reset function. When the movable frame 3 is pushed by air pressure, the elastic element can absorb part of the impact force, reducing damage to the components. When the air pressure returns to normal, the elastic element can push the movable frame 3 back to its initial position. The design of the guide rod 7 ensures that the movable frame 3 remains stable during movement, avoiding poor sealing or damage due to skew or jamming. The elastic connection can absorb part of the impact force, reducing damage to the components and extending the service life of the equipment. The connection between the second vent 71 and the first vent 31 provides a stable flow path for the gas, ensuring smooth flow of gas under both normal and depressurization conditions.

[0046] In another embodiment, the guide rod 7 and the movable frame 3 are detachably connected, which can be a threaded connection or a snap-fit ​​connection; this solution does not impose any restrictions on this. The detachable connection design makes replacing the guide rod 7 and the movable frame 3 more convenient, reducing maintenance time and costs. In the event of equipment failure, the guide rod 7 and the movable frame 3 can be quickly replaced to restore normal equipment function. The detachable design also reduces the possibility of the entire equipment being scrapped due to damage to the guide rod 7 and the movable frame 3, thus lowering the total lifecycle cost of the equipment.

[0047] Please see Figure 1 and Figure 2In one embodiment, the explosion-proof vent valve 100 includes a moisture-proof cover 8, which is sleeved on the guide rod 7 and connected to the valve body 1. An air inlet channel 81 is formed between the moisture-proof cover 8 and the guide rod 7. The moisture-proof cover 8 can prevent external moisture (such as rainwater, dust, etc.) from entering the valve body 1, thereby protecting internal components from the effects of a humid environment. The structural design of the moisture-proof cover 8 can effectively block moisture, ensuring the reliability of the explosion-proof vent valve 100 in a humid environment. The air inlet channel 81 formed between the moisture-proof cover 8 and the guide rod 7 provides a path for gas to enter. The gas enters the valve body 1 through the air inlet channel 81 and then flows through the second vent hole 71 and the first vent hole 31. The moisture-proof cover 8 can protect the connection part 432 between the guide rod 7 and the valve body 1, reducing corrosion and damage caused by the external environment. The design of the moisture-proof cover 8 can extend the service life of the explosion-proof vent valve 100.

[0048] In another embodiment, the explosion-proof vent valve 100 includes a one-way valve disc 9, which is disposed within the second vent hole 71 and used to control the unidirectional flow of gas from the battery compartment to the first vent hole 31. The one-way valve disc 9, located within the second vent hole 71, controls the gas flow only from the battery compartment to the first vent hole 31, preventing reverse flow and thus preventing external gases or contaminants from entering the battery compartment, protecting the environment inside. The design of the one-way valve disc 9 prevents reverse gas flow caused by changes in external pressure, ensuring that the gas pressure inside the battery compartment remains controllable. This design is particularly important when the pressure inside the battery compartment abnormally increases, preventing external gases from entering and avoiding potential safety risks. The one-way valve disc 9 has a simple structure but powerful function, effectively controlling the gas flow direction and improving the reliability of the explosion-proof vent valve 100.

[0049] This utility model also proposes a battery box, which includes the explosion-proof vent valve 100 in any of the above embodiments. The specific structure of the explosion-proof vent valve 100 is as described in the above embodiments. Since this battery box adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0050] For instructions on installing the explosion-proof vent valve 100, please refer to [link / reference]. Figure 2 In another embodiment, a sealing ring is provided on the side of the valve body 1 facing away from the movable frame 3. A screw is inserted through the side wall of the battery box and the valve body 1 to hold the sealing ring between the side wall of the battery box and the valve body 1. Installation can be achieved by tightening the screw. The sealing ring can improve the sealing of the connection and prevent gas leakage in the battery box.

[0051] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An explosion-proof vent valve, characterized in that, include: The valve body is used to fix the valve to the side wall of the battery box and has a vent. A cover body, which is movably mounted on the valve body and forms a gap space between the cover body and the valve body; A movable frame is movably connected to the valve body and the cover, and can cover the vent. A first vent hole is provided at one end of the movable frame near the valve body, and a vent membrane is provided on the side of the movable frame facing away from the valve body. as well as An adjusting member is movably inserted through the cover and forms a ventilated channel with the movable frame, which communicates with the gap space and the first vent hole. The ventilated membrane is located within the ventilated channel, and the adjusting member is configured to close or open the ventilated channel when pressed.

2. The explosion-proof vent valve as described in claim 1, characterized in that, The adjusting component includes a rotary switch and a membrane skeleton. The rotary switch is exposed in the cover and detachably connected to the cover. The membrane skeleton is movably inserted through the cover and connected to the rotary switch. The membrane skeleton is elastically connected to the cover and cooperates with the movable frame to close or open the ventilation channel.

3. The explosion-proof vent valve as described in claim 2, characterized in that, The rotary switch has a limiting protrusion on the side near the cover, and the cover has a limiting groove on the side near the rotary switch. The limiting protrusion can be inserted into the limiting groove.

4. The explosion-proof vent valve as described in claim 2, characterized in that, The membrane skeleton has a sealing part and a connecting part. The connecting part is connected to the rotary switch. The sealing part is used to cooperate with the movable frame to close or open the air passage. The adjusting member includes a spring, which is sleeved on the connecting part and located between the cover and the sealing part.

5. The explosion-proof vent valve as described in claim 4, characterized in that, The rotary switch is detachably connected to the connecting part.

6. The explosion-proof vent valve as described in claim 4, characterized in that, The explosion-proof vent valve includes a first sealing ring, which is located on the side of the movable frame facing the membrane skeleton and exposed on the membrane skeleton. The sealing part cooperates with the first sealing ring to close the venting channel.

7. The explosion-proof vent valve as described in any one of claims 1 to 6, characterized in that, The explosion-proof vent valve includes a second sealing ring, which is disposed on the side of the valve body facing the movable frame and exposed on the valve body. The second sealing ring is located between the valve body and the movable frame.

8. The explosion-proof vent valve as described in any one of claims 1 to 6, characterized in that, The explosion-proof vent valve includes a guide rod, which is movably inserted through the valve body and connected to the movable frame, and has a second vent hole communicating with the first vent hole. The guide rod is elastically connected to the valve body.

9. The explosion-proof vent valve as described in claim 8, characterized in that, The explosion-proof vent valve includes a moisture-proof cover, which is sleeved on the guide rod and connected to the valve body. An air intake channel is formed between the moisture-proof cover and the guide rod; and / or The explosion-proof vent valve includes a one-way valve disc, which is disposed in the second vent hole and is used to control the one-way flow of gas from the battery box to the first vent hole.

10. A battery box, characterized in that, Includes the explosion-proof vent valve as described in any one of claims 1 to 9.

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