A large capacity explosion-proof valve

Abstract

The utility model discloses a large displacement explosion -proof valve, it includes: the main part has the large displacement air hole, the valve core is made into shape by elastomer, is installed on the main part through the fixed mode of buckling, and the valve core blocks up in the large displacement air hole, when the air pressure pressure is greater than the holding force between valve core and main part, the valve core is separated from the main part, to expose the large displacement air hole of main part and carry out pressure relief. The utility model is composed of main part and valve core, and the part quantity is few, and the manufacturing cost is low, and the assembly is simple and efficient, under the conventional state, when the air pressure pressure is less than the holding force between valve core and main part, at this time, the valve core can stably block up the large displacement air hole, reaches the effect of sealing. When the air pressure pressure is greater than the holding force between valve core and main part, the valve core is separated from the main part, to expose the large displacement air hole of main part and carry out pressure relief, thereby making the large displacement air hole of main part open, to realize fast pressure relief in this way, plays the effect of explosion -proof.

Description

Technical fields:

[0001] This utility model relates to the field of explosion-proof valve technology, and specifically to a large-capacity explosion-proof valve. Background technology:

[0002] Chinese utility model patent application number 202121510014.X discloses an explosion-proof valve, which includes: a valve seat, a valve core, a limiting member, and an elastic device; the valve core is movably mounted on the valve seat, and the limiting member is connected to the valve core; the elastic device is mounted on the valve seat, and the elastic device has a tendency to move the valve core from the open position to the closed position; a first sealing member is installed on the end face of the valve seat opposite to the disc body; in the closed position, the first sealing member is squeezed between the valve seat and the disc body of the valve core, thereby ensuring that the explosion-proof valve is well sealed at this time. That is to say, the explosion-proof valve provides elastic force to the valve core and the limiting member through the elastic device to drive the valve core to fit with the valve seat, and the disc body of the valve seat and the valve core form a sealed assembly through the first sealing member.

[0003] The aforementioned explosion-proof valve has a complex structure, including at least five parts: valve seat, valve core and limiting component, elastic device, and first sealing component. It has a large number of parts, high manufacturing cost, and low assembly efficiency.

[0004] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a large-capacity explosion-proof valve.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the large-capacity explosion-proof valve includes: a main body having a large-capacity vent hole; a valve core made of an elastomer, which is installed on the main body by snap-fit ​​fixing, and the valve core blocks the large-capacity vent hole; when the air pressure is greater than the holding force between the valve core and the main body, the valve core is disengaged from the main body to expose the large-capacity vent hole of the main body for pressure relief.

[0007] Furthermore, in the above technical solution, the valve core includes a cover, an inlay portion disposed at the lower part of the cover, and a hook disposed at the lower end of the inlay portion; wherein, the inlay portion of the valve core is embedded in a large-volume vent hole, wherein the cover abuts against the outer side of the upper opening of the large-volume vent hole, and the hook engages and positions with the outer side of the lower opening of the large-volume vent hole to position the valve core in the main body; when the air pressure is greater than the engaging force between the hook and the outer side of the lower opening of the large-volume vent hole, the valve core disengages from the main body to expose the large-volume vent hole of the main body for pressure relief.

[0008] Furthermore, in the above technical solution, the outer periphery of the inlay part is provided with several spaced sealing protrusions, which form a sealing contact with the inner wall of the large-volume vent hole.

[0009] Furthermore, in the above technical solution, a groove is provided at the upper end of the main body, and the large-volume vent is formed after penetrating the lower end face of the main body along the bottom of the groove; the cover is placed in the groove.

[0010] Furthermore, in the above technical solution, the number of hooks is one, which is ring-shaped and distributed on the lower periphery of the inlay part; or, the number of hooks is multiple, each hook is arc-shaped, the multiple hooks are distributed in a ring, and a gap is formed between adjacent hooks to reduce strength.

[0011] Furthermore, in the above technical solution, a convex ring is formed at the lower end of the main body, and a groove is formed between the inner side of the convex ring and the outer side of the lower opening of the large displacement vent hole, and the hook is engaged and positioned with the groove.

[0012] Furthermore, in the above technical solution, the convex ring body has a groove extending upward along its lower end surface, and a sealing ring is embedded in the groove, with the lower end of the groove protruding beyond the lower end surface of the convex ring body.

[0013] Furthermore, in the above technical solution, the valve core has small vent holes along its upper and lower end faces, and a waterproof and breathable membrane is fixedly attached to the lower end of the valve core, which covers the lower opening of the vent holes.

[0014] Furthermore, in the above technical solution, the lower end of the valve core is provided with an installation groove with a connecting vent hole, and the waterproof and breathable membrane is fixedly installed in the installation groove.

[0015] Furthermore, in the above technical solution, the elastomer is silicone or rubber.

[0016] After adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: This utility model consists of a main body and a valve core made of an elastomer. It has fewer parts, lower manufacturing cost, and is simple and efficient to assemble. Under normal conditions, when the air pressure is less than the holding force between the valve core and the main body, the valve core can be stably installed on the main body, thus blocking the large-volume vent hole and achieving a sealing effect. When the air pressure is greater than the holding force between the valve core and the main body, the valve core detaches from the main body, exposing the large-volume vent hole for pressure relief. For example, when thermal runaway occurs in a battery pack equipped with a large-volume explosion-proof valve (i.e., it is about to explode), the air pressure inside the battery pack will rise rapidly. Eventually, the air pressure will exceed the holding force between the valve core and the main body. At this time, the entire valve core will be pushed outward by the air pressure and detached from the main body, thereby opening the large-volume vent hole of the main body, achieving rapid pressure relief and providing an explosion-proof effect. Attached image description:

[0017] Figure 1This is a perspective view of the present invention;

[0018] Figure 2 This is a perspective view of the present invention from another angle;

[0019] Figure 3 This is an exploded perspective view of the present invention;

[0020] Figure 4 This is a cross-sectional view of the present invention;

[0021] Figure 5 This is a perspective view of the valve core in this utility model;

[0022] Figure 6 This is a perspective view of the main body of this utility model;

[0023] Figure 7 This is a perspective view of another structure of the valve core in this utility model. Detailed implementation method:

[0024] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0025] See Figure 1-7 As shown, a large-displacement explosion-proof valve can be used in battery packs. The large-displacement explosion-proof valve includes a main body 1 and a valve core 2.

[0026] The main body 1 has a large-volume vent 11 without any mounting bracket or ribs. The valve core 2 is made of an elastomer to have elastic deformation capability. The valve core 2 is installed on the main body 1 by snap-fit ​​fixing and blocks the large-volume vent 11. Under normal conditions, when the air pressure is less than the holding force between the valve core 2 and the main body 1, the valve core 2 can be stably installed on the main body 1 to block the large-volume vent 11 and achieve a sealing effect. When the air pressure exceeds the holding force between the valve core 2 and the main body 1, the valve core 2 disengages from the main body 1, exposing the large-volume vent 11 of the main body 1 for pressure relief. For example, when thermal runaway occurs in a battery pack equipped with a large-volume explosion-proof valve (meaning it is about to explode), the air pressure inside the battery pack will rise rapidly. Eventually, the air pressure will exceed the holding force between the valve core 2 and the main body 1. At this time, the entire valve core 2 will be pushed outward by the air pressure and disengage from the main body 1, thereby opening the large-volume vent 11 of the main body 1 to achieve rapid pressure relief and achieve the explosion-proof effect.

[0027] The elastomer is silicone or rubber.

[0028] To achieve waterproof and breathable functionality and to ensure pressure balance within and outside the battery pack equipped with a large-capacity explosion-proof valve, the following improvements were made: The valve core 2 has small vent holes 20 along its upper and lower end faces, and a waterproof and breathable membrane 3 is fixedly attached to the lower end of the valve core 2, covering the lower opening of the vent holes 20. Under normal conditions, the battery pack equipped with the large-capacity explosion-proof valve achieves waterproofing and breathability through the waterproof and breathable membrane 3 and the vent holes 20, thus achieving pressure balance within and outside the battery pack.

[0029] The valve core 2 has a mounting groove 220 at its lower end that connects to a small ventilation hole 20, and the waterproof and breathable membrane 3 is fixedly installed in the mounting groove 220. The waterproof and breathable membrane 3 is installed in the mounting groove 220 by heat pressing or adhesive bonding; regardless of the method, as long as the waterproof and breathable membrane 3 is fixedly installed in the mounting groove 220, it is considered secure.

[0030] The valve core 2 includes a cover 21, an inlay portion 22 disposed at the lower part of the cover 21, and a hook 23 disposed at the lower end of the inlay portion 22. The inlay portion 22 of the valve core 2 is inlaid in the large-volume vent hole 11. The cover 21 abuts against the outer side of the upper opening of the large-volume vent hole 11, and the hook 23 is engaged with the outer side of the lower opening of the large-volume vent hole 11 to position the valve core 2 in the main body 1. When the air pressure is greater than the engaging force between the hook 23 and the outer side of the lower opening of the large-volume vent hole 11, the valve core 2 disengages from the main body 1 to expose the large-volume vent hole 11 of the main body 1 for pressure relief.

[0031] The ventilation hole 20 is opened downward along the upper end face of the cover 21 and passes through the lower end face of the inlay part 22, and the mounting groove 220 is provided at the lower end face of the inlay part 22.

[0032] In order to improve the sealing effect between the valve core 2 and the main body 1, the following design was also made: a number of sealing protrusions 221 are provided around the periphery of the inlay part 22. The sealing protrusions 221 form a sealing contact with the inner wall of the large displacement vent hole 11, thereby greatly improving the sealing effect.

[0033] The upper end of the main body 1 is provided with a groove 12, and the large-volume vent 11 is formed after passing through the lower end face of the main body 1 along the bottom of the groove 12; the cover 21 is placed in the groove 12.

[0034] The hook 23 includes at least the following two methods:

[0035] The first method is as follows: the number of hooks 23 is one, which is in the shape of a ring and is distributed on the lower periphery of the inlay part 22; wherein, the pressure of the valve core falling off can be adjusted by adjusting the thickness or length of the hook.

[0036] The second method is as follows: there are multiple hooks 23, each hook 23 is arc-shaped, the multiple hooks 23 are distributed in a ring, and a notch 230 is formed between two adjacent hooks 23 to reduce the strength. In other words, by setting different numbers of notches 230, not only can the material be reduced, but the yield strength of the hook can also be weakened, thereby further controlling the amount of air pressure that is pushed out and detached by air pressure.

[0037] The lower end of the main body 1 also has a convex ring 13. A groove 131 is formed between the inner side of the convex ring 13 and the outer side of the lower opening of the large displacement vent 11. The hook 23 is engaged and positioned with the groove 131.

[0038] The convex ring 13 has a groove 132 extending upwards along its lower end surface. A sealing ring 14 is embedded in the groove 132, and the lower end of the groove 132 protrudes beyond the lower end surface of the convex ring 13. When this invention is installed on the battery pack using screws through the holes 10 on both sides of the main body 1, the sealing ring 14 is in close contact with the battery pack, achieving the purpose of sealing assembly.

[0039] In summary, this utility model consists of a main body 1 and a valve core 2 made of an elastomer. It has fewer parts, lower manufacturing costs, and is simple and efficient to assemble. Under normal conditions, when the air pressure is less than the holding force between the valve core 2 and the main body 1, the valve core 2 can be stably installed on the main body 1, thus sealing the large-capacity vent 11 and achieving a sealing effect. When the air pressure is greater than the holding force between the valve core 2 and the main body 1, the valve core 2 disengages from the main body 1, exposing the large-capacity vent 11 for pressure relief. For example, when thermal runaway occurs in a battery pack equipped with a large-capacity explosion-proof valve (i.e., it is about to explode), the air pressure inside the battery pack will rise rapidly. Eventually, the air pressure will exceed the holding force between the valve core 2 and the main body 1. At this point, the entire valve core 2 will be pushed outward by the air pressure and disengage from the main body 1, thereby opening the large-capacity vent 11 of the main body 1, achieving rapid pressure relief and providing an explosion-proof effect.

[0040] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A large capacity explosion relief valve characterized by: It includes: The main body (1) has a large-volume air vent (11); A valve core (2) made of elastomer is installed on the main body (1) by snap-fit ​​fixing, and the valve core (2) blocks the large displacement vent hole (11); When the air pressure is greater than the holding force between the valve core (2) and the main body (1), the valve core (2) disengages from the main body (1) to expose the large-volume vent hole (11) of the main body (1) for depressurization.

2. A large capacity explosion relief valve according to claim 1 wherein: The valve core (2) includes a cover (21), an inlay part (22) disposed at the lower part of the cover (21), and a hook (23) disposed at the lower end of the inlay part (22); wherein, the inlay part (22) of the valve core (2) is inlaid in the large displacement vent hole (11), wherein the cover (21) abuts against the outer side of the upper opening of the large displacement vent hole (11), and the hook (23) is engaged and positioned with the outer side of the lower opening of the large displacement vent hole (11) to position the valve core (2) in the main body (1); when the air pressure is greater than the engaging force between the hook (23) and the outer side of the lower opening of the large displacement vent hole (11), the valve core (2) disengages from the main body (1) to expose the large displacement vent hole (11) of the main body (1) for pressure relief.

3. A large capacity explosion relief valve according to claim 2, wherein: The outer periphery of the inlay part (22) is provided with several spaced sealing protrusions (221), which form a sealing contact with the inner wall of the large displacement vent (11).

4. A large capacity explosion relief valve according to claim 2, wherein: The upper end of the main body (1) is provided with a groove (12), and the large-volume vent (11) is formed after penetrating the lower end face of the main body (1) along the bottom of the groove (12); the cover (21) is placed in the groove (12).

5. A large capacity explosion relief valve according to claim 2, wherein: The number of hooks (23) is one, which is in the shape of a ring and is distributed on the lower periphery of the inlay part (22); or, the number of hooks (23) is multiple, each hook (23) is arc-shaped, the multiple hooks (23) are distributed in a ring, and a notch (230) is formed between two adjacent hooks (23) to reduce strength.

6. A large capacity explosion relief valve according to any one of claims 2 to 5 wherein: The lower end of the main body (1) is also formed with a convex ring (13), and a groove (131) is formed between the inner side of the convex ring (13) and the outer side of the lower opening of the large displacement vent (11), and the hook (23) is engaged and positioned with the groove (131).

7. A large capacity explosion relief valve according to claim 6 wherein: The convex ring body (13) has a groove (132) extending upward along its lower end surface. A sealing ring (14) is embedded in the groove (132), and the lower end of the groove (132) protrudes beyond the lower end surface of the convex ring body (13).

8. A large capacity explosion relief valve according to any one of claims 1-5, characterized in that: The valve core (2) has small ventilation holes (20) on its upper and lower end faces, and a waterproof and breathable membrane (3) is fixedly attached to the lower end of the valve core (2), which covers the lower opening of the ventilation holes (20).

9. A large capacity explosion relief valve according to claim 8, wherein: The lower end of the valve core (2) is provided with an installation groove (220) that connects to the ventilation hole (20), and the waterproof and breathable membrane (3) is fixedly installed in the installation groove (220).

10. A large capacity explosion relief valve according to claim 8, wherein: The elastomer is silicone or rubber.

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