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 valve body technical field, wherein explosion-proof breather valve includes main body, movable framework, breathable membrane and sealing ring;Main body is used to be fixed in the lateral wall of battery box, main body is formed with mounting hole, the circumferential of mounting hole is equipped with venting mouth;Movable framework is movably threaded in mounting hole;The side of main body facing movable framework is formed with ring groove, the outer groove wall of ring groove is further protruding and has the clamping strip extending along the radial direction of ring groove, clamping strip is located in the notch of ring groove, the length of clamping strip along the radial direction of ring groove is less than the length of the notch of ring groove along the radial direction of ring groove;Breathable membrane is located in movable framework, and cover is set in venting mouth;Sealing ring is located in ring groove, to be positioned by clamping strip.The technical scheme of the utility model aims at being positioned in ring groove by setting ring groove structure with clamping strip, prevent sealing ring from displacement in use process, to guarantee long-term effective sealing performance.

Description

Technical Field

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

[0002] A battery explosion-proof vent valve is a safety pressure relief device integrated into the casing of a battery cell or battery module. It is usually made of metal or composite materials and has a grooved valve plate or elastic diaphragm inside. When the internal pressure rises sharply to a set threshold (such as 3-5 kPa) due to thermal runaway or short circuit, the valve plate rises instantly to form a directional venting channel, quickly expelling high-temperature and high-pressure gas and electrolyte vapor, preventing the casing from rupturing and suppressing the spread of flames. After the dangerous pressure is released, it returns to its natural state, thereby limiting thermal runaway to a single battery cell or a local module.

[0003] To prevent external dust from entering the valve body through the main body and the movable frame where the breathable membrane is installed, a sealing ring is usually installed between the main body and the movable frame; however, the sealing ring may shift under prolonged use, leading to sealing failure. Utility Model Content

[0004] The main purpose of this invention is to provide an explosion-proof vent valve and battery box, which aims to reduce the probability of sealing failure of the explosion-proof vent valve due to the displacement of the sealing ring.

[0005] To achieve the above objectives, the explosion-proof vent valve proposed in this utility model includes:

[0006] The main body is used to fix it to the side wall of the battery box. The main body has a mounting hole and a vent is provided around the mounting hole.

[0007] A movable frame is movably inserted through the mounting hole; an annular groove is formed on the side of the main body facing the movable frame, and a retaining strip extending radially along the outer wall of the annular groove is also protruding therein, the retaining strip is located at the opening of the annular groove, and the length of the retaining strip along the radial direction of the annular groove is less than the length of the opening of the annular groove along the radial direction of the annular groove.

[0008] A breathable membrane, wherein the breathable membrane is disposed on the movable frame and covers the explosion vent; and

[0009] A sealing ring is disposed within the annular groove and is limited by the retaining strip.

[0010] In one embodiment, the movable frame includes a movable plate, a limiting rod, and an elastic element. The movable plate is disposed on the limiting rod, and the limiting rod is movably connected within the mounting hole. The elastic element is sleeved on the limiting rod, and its two ends respectively abut against the main body and the end of the limiting rod away from the movable plate. The movable plate covers the explosion vent, and the breathable membrane is disposed on the side of the movable plate opposite to the explosion vent.

[0011] In one embodiment, the end of the limiting rod away from the movable plate has an annular protrusion, and the elastic element abuts against the annular protrusion.

[0012] In one embodiment, the elastic element is a return spring.

[0013] In one embodiment, the explosion-proof vent valve further includes a moisture-proof cap, which is detachably connected to the side of the main body away from the vent membrane; the moisture-proof cap and the main body enclose a moisture-proof cavity, and the elastic element is located inside the moisture-proof cavity.

[0014] In one embodiment, the waterproof cap is made of nylon.

[0015] In one embodiment, the movable plate has a connecting post protruding towards the limiting rod, and the movable plate is threadedly connected to the limiting rod through the connecting post; at least a portion of the structure of the connecting post is located inside the limiting rod.

[0016] In one embodiment, the main body is made of metal or plastic.

[0017] In one embodiment, the main body is provided with a plurality of the locking strips, and each locking strip is distributed at intervals along the circumference of the annular groove at the opening of the annular groove.

[0018] This utility model also proposes a battery box, which includes a box body and the aforementioned explosion-proof vent valve. The main body is disposed in the box body, and the movable frame is movably connected to the side of the main body away from the box body.

[0019] In the technical solution of this utility model, the explosion-proof vent valve includes a main body, a movable frame, a vent membrane, and a sealing ring; the main body is used to fix it to the side wall of the battery box, and the main body has a mounting hole, with a vent hole in the circumferential direction of the mounting hole; the movable frame is movably inserted through the mounting hole; an annular groove is formed on the side of the main body facing the movable frame, and a retaining strip extending radially along the outer wall of the annular groove is also protruding, the retaining strip is located at the groove opening of the annular groove, and the length of the retaining strip along the radial direction of the annular groove is less than the length of the groove opening along the radial direction of the annular groove; the vent membrane is disposed on the movable frame and covers the vent hole; the sealing ring is disposed in the annular groove and is limited by the retaining strip. In the technical solution of this utility model, by setting an annular groove structure with a retaining strip, the sealing ring is limited in the annular groove to prevent the sealing ring from shifting during use, thereby ensuring long-term effective sealing performance; the length of the retaining strip is less than the length of the annular groove opening, which facilitates the installation and replacement of the sealing ring, while ensuring effective limiting of the sealing ring; thus, the explosion-proof vent valve can reduce the probability of sealing failure caused by the displacement of the sealing ring. Attached Figure Description

[0020] 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.

[0021] Figure 1 A schematic diagram of a structure of an embodiment of the explosion-proof vent valve provided by this utility model;

[0022] Figure 2 Exploded view of an explosion-proof vent valve;

[0023] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 This is a cross-sectional view of an explosion-proof vent valve.

[0025] Explanation of icon numbers:

[0026] 1 main body 213a air outlet 1a Mounting holes 214 Connecting column 1b Annular groove 22 Limit bar 1c Threaded hole 221 Annular protrusion 11 Card strip 23 elastic element 2 movable skeleton 3 breathable membrane 21 Activity board 4 sealing ring 211 First board 5 Moisture-proof hat 212 Second board 5a Moisture proof chamber

[0027] 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

[0028] 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.

[0029] 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.

[0030] 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.

[0031] To solve the above problems, this utility model proposes an explosion-proof vent valve 1000. Figure 1 , Figure 2 , Figure 3 as well as Figure 4 A schematic diagram of the structure of an embodiment of the explosion-proof vent valve 1000 provided by this utility model.

[0032] Please refer to Figure 1 , Figure 2 as well as Figure 3This utility model proposes an explosion-proof vent valve 1000, comprising a main body 1, a movable frame 2, a vent membrane 3, and a sealing ring 4. The main body 1 is fixed to the side wall of the battery box and has a mounting hole 1a. The mounting hole 1a has a circumferentially provided explosion vent. The movable frame 2 is movably inserted through the mounting hole 1a. An annular groove 1b is formed on the side of the main body 1 facing the movable frame 2. The outer groove wall of the annular groove 1b is also provided with a retaining strip 11 extending radially along the annular groove 1b. The retaining strip 11 is located at the groove opening of the annular groove 1b, and the length of the retaining strip 11 along the radial direction of the annular groove 1b is less than the length of the groove opening of the annular groove 1b along the radial direction of the annular groove 1b. The vent membrane 3 is disposed on the movable frame 2 and covers the explosion vent. The sealing ring 4 is disposed in the annular groove 1b and is limited by the retaining strip 11.

[0033] The breathable membrane 3 has a microporous structure that allows only gas molecules to pass through, but not liquid molecules or other dust particles, thus achieving a balance between the gases inside and outside the enclosure. When the gas pressure inside the enclosure exceeds a critical value, the movable frame 2 is pushed to detach the breathable membrane 3 from the explosion vent, allowing the high-pressure gas and electrolyte inside the enclosure to be released through the explosion vent, ensuring battery safety. When the internal gas pressure of the battery increases, the gas is discharged through the breathable membrane 3 and the explosion vent, preventing the battery enclosure from exploding. The movable design of the movable frame 2 allows for appropriate displacement when the gas pressure increases, further promoting gas discharge.

[0034] In the technical solution of this utility model, by setting an annular groove 1b structure with a retaining strip 11, the sealing ring 4 is limited within the annular groove 1b to prevent the sealing ring 4 from shifting during use, thereby ensuring long-term effective sealing performance; the length of the retaining strip 11 is less than the length of the groove opening of the annular groove 1b, which facilitates the installation and replacement of the sealing ring 4, while ensuring effective limiting of the sealing ring 4; thus, the explosion-proof vent valve 1000 can reduce the probability of sealing failure caused by the displacement of the sealing ring 4.

[0035] Please refer to Figure 2 and Figure 4 In one embodiment of this utility model, the movable frame 2 includes a movable plate 21, a limiting rod 22, and an elastic element 23. The movable plate 21 is disposed on the limiting rod 22, and the limiting rod 22 is movably connected in the mounting hole 1a. The elastic element 23 is sleeved on the limiting rod 22, and the two ends of the elastic element 23 abut against the main body 1 and the end of the limiting rod 22 away from the movable plate 21, respectively. The movable plate 21 covers the explosion vent, and the breathable membrane 3 is disposed on the side of the movable plate 21 away from the explosion vent.

[0036] Specifically, the movable plate 21 is used to cover the explosion vent to prevent direct gas leakage. The limiting rod 22 is movably connected within the mounting hole 1a, allowing the movable frame 2 to move within a certain range. The elastic element 23 provides restoring force; when the gas pressure increases, the movable plate 21 is compressed and moves, and the elastic element 23 is compressed; when the gas pressure returns to normal, the elastic element 23 pushes the movable plate 21 back to its original position. The breathable membrane 3 is located on the outside of the movable plate 21, allowing air to pass through while preventing external dust from entering.

[0037] The automatic opening and closing function of the explosion vent is realized through the structural design of the movable frame 2. When the internal air pressure of the battery box exceeds the set threshold, the movable plate 21 is pressed and moves, the explosion vent opens, and the high-pressure gas is released; when the air pressure returns to normal, the elastic element 23 pushes the movable plate 21 to reset and reseal the explosion vent. This not only effectively relieves pressure, but also automatically restores the sealing state after pressure relief.

[0038] In one embodiment of the present invention, the movable plate 21 is composed of a first plate 211, a second plate 212 and a third plate 213 stacked together. The third plate 213 is the plate closest to the main body 1, and the third plate 213 is provided with a connecting post 214 facing the limiting rod 22.

[0039] The explosion-proof vent valve 1000 proposed in this application has a closed state and an open state. When the pressure inside the battery box does not exceed the pressure threshold set by the valve body, the explosion-proof vent valve 1000 is in the closed state. In the closed state, the explosion-proof vent valve 1000 can still communicate with the outside gas. Specifically, the limiting rod 22 is a hollow structure with a first channel inside that communicates with the inside of the battery box. The other end of the limiting rod 22 is connected to the connecting post 214 of the movable plate 21. The connecting post 214 has a second channel that communicates with the first channel inside the limiting rod 22. The end of the second channel away from the first channel communicates with the vent membrane 3. The vent membrane 3 is a third plate 213 in the movable plate 21. The third plate 213 has multiple air outlets 213a on the side facing away from the second channel. When the gas pressure inside the battery box is too high and reaches the pressure threshold, the gas can pass through the first channel, the second channel, and then through the vent membrane 3, and be discharged from the air outlets 213a, thereby achieving pressure balance with the outside.

[0040] Please refer to Figure 2 and Figure 4 In one embodiment of the present invention, the end of the limiting rod 22 away from the movable plate 21 is formed with an annular protrusion 221, and the elastic member 23 abuts against the annular protrusion 221.

[0041] The annular protrusion 221 serves as the end structure of the limiting rod 22, and its outer diameter is larger than the diameter of the main body 1 of the limiting rod 22, forming a radial flange structure. Specific implementation methods include, but are not limited to: the annular protrusion 221 can be integrally formed with the limiting rod 22 and machined into a stepped structure; or it can be designed separately and fixed to the end of the limiting rod 22 by welding or threaded connection.

[0042] The axial positioning of the elastic element 23 is achieved through the annular protrusion 221 structure, effectively preventing the elastic element 23 from falling off the end of the limiting rod 22 during compression. When the movable frame 2 moves under air pressure, the elastic element 23 always maintains stable contact with the limiting rod 22 through the annular protrusion 221, ensuring that the movable plate 21 can accurately return to the sealing position of the explosion vent.

[0043] It is understood that the elastic element 23 can be a return spring, silicone, or rubber. In one embodiment of this utility model, the elastic element 23 is a return spring.

[0044] The return spring can be in the form of a cylindrical helical spring, a conical spring, or a butterfly spring. Among them, the cylindrical helical spring is preferably made of stainless steel to ensure corrosion resistance.

[0045] This technical solution has the following advantages: First, the linear elasticity of the spring ensures that the movable frame 2 can be accurately reset after pressure relief, and its force-displacement relationship can be more easily controlled by adjusting the spring parameters; second, the spring structure is simple and reliable, and it is not prone to creep or aging in the closed environment of the moisture-proof cavity 5a; finally, the standardized spring is easy to purchase and assemble in batches, and different pressure relief threshold requirements can be adapted by adjusting parameters such as the wire diameter and the number of turns.

[0046] Please refer to Figure 2 and Figure 4 In one embodiment of the present invention, the explosion-proof vent valve 1000 further includes a moisture-proof cap 5, which is detachably connected to the side of the main body 1 away from the vent membrane 3; the moisture-proof cap 5 and the main body 1 enclose a moisture-proof cavity 5a, and the elastic element 23 is located inside the moisture-proof cavity 5a.

[0047] The moisture-proof cap 5 is detachably connected to the main body 1 via a snap-fit ​​or threaded structure, specifically using a rotating snap-fit ​​or a flexible snap-fit ​​connection. The sealing of the moisture-proof cavity 5a can be achieved by placing a rubber gasket at the connection point or applying sealant. In addition to nylon, the moisture-proof cap 5 can also be made of engineering plastics such as polypropylene and polycarbonate.

[0048] By adding a moisture-proof cavity 5a outside the return spring, external moisture is effectively isolated from the corrosive effects of the elastic element 23. The enclosed space formed by the moisture-proof cap 5 and the main body 1 prevents corrosive media such as electrolyte vapor and condensate from contacting the spring, avoiding spring failure due to corrosion. Compared to an exposed spring design, this structure allows the valve body to maintain stable pressure relief triggering performance in humid environments, while also facilitating spring maintenance and replacement by disassembling the moisture-proof cap 5. The physical isolation provided by the moisture-proof cavity 5a extends the service life of the elastic element 23, ensuring the reliability of the pressure relief function throughout the battery's entire lifespan.

[0049] In one embodiment of this utility model, the waterproof cap 5 is made of nylon.

[0050] The choice of nylon material is based on its corrosion resistance, mechanical strength, and cost advantages, which can effectively protect the internal elastic element 23 in humid environments. By adding a nylon moisture-proof cap 5 to form a closed cavity, the elastic element 23 is isolated from the external environment. When the battery box is in a high-humidity environment, the moisture-proof cavity 5a can prevent moisture from contacting the elastic element 23, avoiding the spring from failing or becoming stuck due to corrosion.

[0051] Please refer to Figure 4 In one embodiment of the present invention, the movable plate 21 is provided with a connecting post 214 protruding towards the limiting rod 22, and the movable plate 21 is threadedly connected to the limiting rod 22 through the connecting post 214; at least a part of the structure of the connecting post 214 is located inside the limiting rod 22.

[0052] Specifically, the connecting column 214 is a cylindrical metal component, which is machined to form an integral structure with the movable plate 21.

[0053] The movable plate 21 and the limiting rod 22 are detachably fixed via a threaded connection, which is easier to maintain and replace compared to welding or riveting. The design of the connecting post 214 partially embedding the guide rod ensures connection strength while preventing exposed structures from affecting the movement of the elastic element 23. The precision machining of the threaded fit ensures the coaxiality of the movable plate 21 and the limiting rod 22, making the elastic element 23 bear force evenly, thereby improving the service life of the sealing ring 4. When it is necessary to replace the breathable membrane 3, the movable plate 21 can be removed simply by unscrewing the connecting post 214, without having to replace the entire movable frame 2 assembly.

[0054] It is understood that the material of the main body 1 can be metal, nylon, or other plastic materials. In one embodiment of this utility model, the material of the main body 1 is metal.

[0055] Specifically, the metal material can be stainless steel, aluminum alloy, or other corrosion-resistant metal materials. As a preferred embodiment, 304 stainless steel is used, which has excellent mechanical strength and chemical corrosion resistance. Furthermore, the metal body 1 can be formed by die casting, stamping, or machining processes, with die casting being suitable for mass production and ensuring dimensional accuracy and structural strength. The surface of the body 1 can be anodized or plated to enhance weather resistance.

[0056] The metal body 1 solves the problem of material creep caused by long-term pressure on the sealing ring 4. Due to the high rigidity of metal, it maintains a stable structural shape when the retaining strip 11 limits the sealing ring 4, avoiding deformation of the plastic material due to long-term stress, thus ensuring the durable positioning effect of the annular groove 1b on the sealing ring 4. Compared with composite materials, the metal material can also withstand higher operating temperatures, maintaining structural integrity during battery thermal runaway and preventing softening and deformation of the body 1 due to high temperatures.

[0057] It is understood that the main body 1 has a plurality of retaining strips 11 protruding from it, and each retaining strip 11 is distributed at intervals along the circumference of the annular groove 1b at the opening of the groove 1b. In one embodiment of the present invention, the main body 1 has four retaining strips 11 protruding from it.

[0058] Specifically, the cross-sectional shape of the card strip 11 can be rectangular, trapezoidal or semi-circular, among which the rectangular cross-section has the advantage of being easy to process.

[0059] The composite limiting structure formed by multiple circumferentially distributed locking strips 11 offers the following advantages compared to a single locking strip 11 solution: First, multi-point limiting effectively disperses the circumferential shear force on the sealing ring 4, preventing rotational displacement under long-term vibration. Second, the spaced locking strips 11 allow the sealing ring 4 to undergo localized deformation under pressure, maintaining sealing performance while avoiding stress concentration. Finally, this design significantly improves the positional stability of the sealing ring 4 without substantially increasing component complexity. This technical solution directly addresses the problem of sealing failure caused by sealing ring 4 displacement, improving the reliability of the explosion-proof vent valve 1000 under complex operating conditions through optimized limiting structure.

[0060] In one embodiment of this application, the breathable membrane 3 adopts a three-dimensional microfiber network structure of expanded polytetrafluoroethylene (ePTFE) membrane, with a pore size distribution of 0.1-1.0 μm, which is 2-3 orders of magnitude larger than gas molecules (approximately 0.3 nm), but 1-2 orders of magnitude smaller than liquid water droplets (>1000 μm) and typical dust particles (>10 μm). Due to the "size sieving" effect, when a micro-pressure difference of ±3-5 kPa is generated inside the chamber due to temperature difference or altitude change, gas molecules can diffuse freely along the micropores to achieve bidirectional isobaric equilibrium. Water, electrolyte droplets, and dust are blocked because they cannot wet the hydrophobic membrane surface due to surface tension, achieving IP67 waterproof and breathable rating. The ePTFE microfiber has low internal surface energy and a droplet contact angle >160°, further preventing capillary penetration. At the same time, the membrane material is heat resistant to 260℃ and electrolyte corrosion resistant, maintaining a certain amount of air permeability for a long time, ensuring that the explosion-proof breathable valve 1000 continuously balances the internal and external pressures without failure when closed.

[0061] The breathable membrane 3 releases daily air pressure fluctuations within the range of ±3-5kPa in real time through a bidirectional micro-pressure differential conduction mechanism, preventing the enclosure from fatigue and deformation due to repeated expansion and collapse caused by the "breathing effect". At the same time, it prevents external water and dust from entering, reducing the internal temperature rise rate by more than 20% and lowering the long-term operating temperature of components by 5-8℃. This extends the lifespan of the battery cells and electronic components by about 30% and reduces the maintenance frequency of the sealing strips by more than 50%.

[0062] This utility model also proposes a battery box, which includes a box body and the aforementioned explosion-proof vent valve 1000. The explosion-proof vent valve 1000 is installed at the explosion vent position on the side wall of the battery box. The main body 1 is disposed in the box body, and the movable frame 2 is movably connected to the side of the main body 1 away from the box body. The specific structure of the explosion-proof vent valve 1000 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.

[0063] The main body 1 has multiple threaded holes 1c, each threaded hole 1c being used to screw the explosion-proof vent valve 1000 onto the battery box housing; specifically, the number of threaded holes 1c can be 3, 4, or more, and this utility model does not impose any restrictions here.

[0064] 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 main body is used to fix it to the side wall of the battery box. The main body has a mounting hole and a vent is provided around the mounting hole. A movable frame is movably inserted through the mounting hole; an annular groove is formed on the side of the main body facing the movable frame, and a retaining strip extending radially along the outer wall of the annular groove is also protruding therein, the retaining strip is located at the opening of the annular groove, and the length of the retaining strip along the radial direction of the annular groove is less than the length of the opening of the annular groove along the radial direction of the annular groove. A breathable membrane, wherein the breathable membrane is disposed on the movable frame and covers the explosion vent; and A sealing ring is disposed within the annular groove and is limited by the retaining strip.

2. The explosion-proof vent valve as described in claim 1, characterized in that, The movable frame includes a movable plate, a limiting rod, and an elastic element. The movable plate is disposed on the limiting rod, and the limiting rod is movably connected to the mounting hole. The elastic element is sleeved on the limiting rod, and its two ends abut against the main body and the end of the limiting rod away from the movable plate, respectively. The movable plate covers the explosion vent, and the breathable membrane is disposed on the side of the movable plate opposite to the explosion vent.

3. The explosion-proof vent valve as described in claim 2, characterized in that, The end of the limiting rod away from the movable plate has an annular protrusion, and the elastic element abuts against the annular protrusion.

4. The explosion-proof vent valve as described in claim 3, characterized in that, The elastic element is a return spring.

5. The explosion-proof vent valve as described in claim 4, characterized in that, The explosion-proof vent valve also includes a moisture-proof cap, which is detachably connected to the side of the main body away from the vent membrane; the moisture-proof cap and the main body enclose a moisture-proof cavity, and the elastic element is located inside the moisture-proof cavity.

6. The explosion-proof vent valve as described in claim 5, characterized in that, The waterproof cap is made of nylon.

7. The explosion-proof vent valve as described in claim 2, characterized in that, The movable plate has a connecting post protruding towards the limiting rod, and the movable plate is threadedly connected to the limiting rod through the connecting post; at least a portion of the structure of the connecting post is located inside the limiting rod.

8. The explosion-proof vent valve as described in any one of claims 1 to 7, characterized in that, The main body is made of metal or plastic.

9. The explosion-proof vent valve as described in any one of claims 1 to 7, characterized in that, The main body is provided with a plurality of the aforementioned clips, and each of the clips is distributed at intervals along the circumference of the annular groove at the opening of the annular groove.

10. A battery box, characterized in that, The battery box includes a box body and an explosion-proof vent valve as described in any one of claims 1 to 9, the main body is disposed on the box body, and the movable frame is movably connected to the side of the main body away from the box body.

Images