Novel needling type anti-explosion valve

Abstract

The utility model relates to the technical field of anti-explosion valves, and discloses a novel needling type anti-explosion valve which comprises a valve body and a breathable film. The valve body comprises a valve body and a needling structure which are connected with each other, the valve body is provided with a ventilation channel, the needling structure is arranged in the ventilation channel, and the needling structure comprises a needle and a supporting structure arranged on the periphery of the needle. The breathable film is fixed to the valve body, covers the needle and abuts against the supporting structure. According to the utility model, the support structure is arranged around the needle to support the breathable film, so that when the internal air pressure of the battery pack reaches a certain degree, the breathable film can be deformed to a certain degree to cause the needle to pierce the breathable film, and the support structure can ensure that the deformation of the breathable film is constant under different working conditions; and therefore, the stable valve opening pressure of the anti-explosion valve ensures the safety performance of equipment carrying the battery pack, and the protection level of the battery packs with different structures is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof valves, in particular to a novel needle-puncture type explosion-proof valve. Background Art

[0002] With the popularization and development of new energy technologies, battery safety has received more and more attention. Batteries contain a large number of chemical substances, which will produce mixed gases during the charging and discharging process of the battery. These mixed gases gather and expand inside the sealed cavity to generate pressure. If the pressure is not released in time, the service life of the battery will be seriously affected, and the battery may even explode, resulting in equipment failure, short circuit and fire.

[0003] In order to solve the above problems, traditional explosion-proof valves are equipped with spikes and breathable membranes. During the transportation of new energy equipment with batteries, a large positive pressure will be generated inside the sealed cavity of the equipment, causing the breathable membrane to deform. When the deformation of the breathable membrane reaches a certain degree, the spikes will pierce the breathable membrane to release the internal air pressure.

[0004] The above-mentioned traditional explosion-proof valve can only puncture the air-permeable membrane to release internal pressure when the air pressure inside increases. However, since devices carrying different battery packs have different requirements for the air permeability of explosion-proof valves, the valve opening pressure of explosion-proof valves is obviously different, that is, different valve opening pressures need to be adjusted for explosion-proof valves with different air permeability, which will cause certain safety hazards to the equipment.

[0005] Therefore, the prior art needs to be improved. Utility Model Content

[0006] In view of the defects of the existing technology, the utility model provides a new type of needle-puncture explosion-proof valve, aiming to solve the technical problem that the valve opening pressure of the current explosion-proof valve needs to be adjusted along with its air permeability, thereby causing certain safety hazards to the equipment.

[0007] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0008] The utility model provides a novel needle-puncture explosion-proof valve, comprising:

[0009] A valve body, comprising a valve body main body and a needle-piercing structure connected to each other: wherein the valve body main body is provided with an air-permeable channel, the needle-piercing structure is arranged in the air-permeable channel, and the needle-piercing structure comprises needles and a supporting structure arranged around the needles; and

[0010] The breathable membrane is fixed to the valve body, covers the punctures, and abuts against the support structure.

[0011] In some embodiments, it also includes:

[0012] The top cover is fixed to the valve body, is located in the air permeable channel, and is located on a side of the air permeable membrane that is not in contact with the supporting structure.

[0013] In some embodiments, the top cover is fixed to the inner wall of the valve body by heat riveting.

[0014] In some embodiments, the top cover covers the breathable membrane, and there is a gap between the top cover and the breathable membrane.

[0015] In some embodiments, it also includes:

[0016] The bottom cover is detachably connected to the valve body, is located in the air permeable channel, and is located on a side of the air permeable membrane that abuts against the supporting structure.

[0017] In some embodiments, the bottom cover is snap-fitted and fixed to the valve body.

[0018] In some embodiments, it also includes:

[0019] A nut is threadedly connected to the outer wall of the valve body.

[0020] In some embodiments, it also includes:

[0021] A sealing ring is arranged in a groove formed between the nut and the valve body, and is in contact with the nut and the valve body.

[0022] In some embodiments, the needle punching and the support structure are integrally formed.

[0023] In some embodiments, the air permeable membrane is heat-sealed and fixed to the inner wall of the valve body.

[0024] Beneficial effect: The utility model provides a supporting structure around the acupuncture point to support the breathable membrane, so that when the internal air pressure of the battery pack reaches a certain level, the breathable membrane will undergo a certain deformation, causing the acupuncture to pierce the breathable membrane, and the supporting structure can ensure that the deformation of the breathable membrane under different working conditions is constant, that is, the valve opening pressure is constant and is not affected by the change in the air permeability of the explosion-proof valve. Therefore, the stable valve opening pressure of the explosion-proof valve ensures the safety performance of the equipment carrying the battery pack and improves the protection level of battery packs with different structures. Therefore, the utility model solves the technical problem that the current valve opening pressure of the explosion-proof valve needs to be adjusted with its air permeability, thereby causing certain safety hazards to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the exploded structure of a new type of needle-puncture explosion-proof valve provided in some embodiments of the utility model.

[0027] Figure 2 It is a schematic diagram of the planar structure of a new type of needle-puncture explosion-proof valve provided in some embodiments of the utility model.

[0028] Figure 3 yes Figure 2 Cross-section view along the AA direction.

[0029] Description of reference numerals:

[0030] 100, valve body; 110, valve body; 111, air permeable channel; 120, needle-punched structure; 121, needle-punched; 122, supporting structure; 200, air permeable membrane; 300, top cover; 400, bottom cover; 410, snap-fitting part; 500, nut; 510, groove; 600, sealing ring. DETAILED DESCRIPTION

[0031] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "above", "aforesaid", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, and / or modules, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, and / or groups thereof. It should be understood that when an element is referred to as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0032] Those skilled in the art will appreciate that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as the general understanding of those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0033] See also Figure 1 , Figure 2 ,as well as Figure 3 The utility model provides a new type of needle-puncture explosion-proof valve, including a valve body 100 and a breathable membrane 200. The valve body 100 includes a valve body 110 and a needle-puncture structure 120 connected to each other; in some embodiments, the needle-puncture structure 120 is integrally formed with the valve body 110. The valve body 110 is provided with a breathable channel 111; wherein the mixed gas generated by the chemical substances in the battery during the charging and discharging process of the battery can flow in the breathable channel 111. The needle-puncture structure 120 is arranged in the breathable channel 111, and the needle-puncture structure 120 includes a needle puncture 121 and a support structure 122 arranged around the needle puncture 121; in some embodiments, the needle puncture 121 and the support structure 122 are integrally formed. The breathable membrane 200 is fixed to the valve body 110; in some embodiments, the breathable membrane 200 is fixed to the inner wall of the valve body 110 by heat sealing. The breathable membrane 200 covers the needle punctures 121 and abuts against the support structure 122 ; that is, the support structure 122 disposed around the needle punctures 121 is used to support the breathable membrane 200 .

[0034] It can be understood that in the above embodiment, when the air pressure is in a normal state, gas interaction with the outside world can be achieved through the breathable membrane; when the air pressure is too high, the breathable membrane is deformed and the breathable membrane is punctured by a needle to achieve pressure relief. During the deformation process of the breathable membrane, the supporting structure located around the needle is always in contact with the breathable membrane to support the breathable membrane, so the deformation of the breathable membrane is stable, that is, the air pressure required when the needle punctures the breathable membrane (that is, the valve opening pressure) is stable, thereby avoiding certain safety hazards to the equipment.

[0035] The explosion-proof valve supports the breathable membrane by providing a supporting structure around the needle puncture. When the internal air pressure of the battery pack reaches a certain level, the breathable membrane will undergo a certain deformation, resulting in the needle puncturing the breathable membrane. The supporting structure can ensure that the deformation of the breathable membrane under different working conditions is constant, that is, the valve opening pressure is constant and is not affected by the change in the air permeability of the explosion-proof valve, thereby avoiding large fluctuations in the valve opening pressure of different explosion-proof valves when the air permeability increases or decreases. Furthermore, the stable valve opening pressure of the explosion-proof valve ensures the safety performance of the equipment carrying the battery pack and improves the protection level of battery packs with different structures.

[0036] In some embodiments, Figure 1 , Figure 2 ,as well as Figure 3 As shown, the needle 121 is a conical thorn, and the support structure 122 is a cylindrical support rib surrounding the needle 121, so as to more effectively stabilize the deformation of the breathable membrane 200.

[0037] In some embodiments, Figure 1 , Figure 2 ,as well as Figure 3 As shown, the explosion-proof valve further includes a top cover 300 (provided with one or more holes communicating with the air permeable passage 111) fixed to the valve body 110; in one implementation, the top cover 300 is fixed to the inner wall of the valve body 110 by heat riveting, that is, the top cover 300 and the valve body 100 are assembled together by heat riveting. The top cover 300 is located in the air permeable passage 111 and on the side of the air permeable membrane 200 that is not in contact with the support structure 122, so that the top cover 300 has a protective effect on the air permeable membrane 200, preventing the internal impurities or foreign matter from directly causing damage to the air permeable membrane 200 (that is, the air permeable membrane 200 is located between the needle-punched structure 120 and the top cover 300).

[0038] Furthermore, if Figure 3 As shown, the top cover 300 covers the breathable membrane 200 , and there is a gap between the top cover 300 and the breathable membrane 200 , so as to avoid affecting the deformation of the breathable membrane 200 .

[0039] In some embodiments, Figure 1 , Figure 2 ,as well as Figure 3 As shown, the explosion-proof valve further includes a bottom cover 400 (provided with one or more holes communicating with the air permeable passage 111) detachably connected to the valve body 110; in some embodiments, as shown in FIG. 10, the bottom cover 400 is fixedly engaged with the valve body 110 by the engaging portion 410, that is, the bottom cover 400 and the valve body 100 are assembled together by the engaging structure. The bottom cover 400 is located in the air permeable passage 111 and is located on the side of the air permeable membrane 200 that abuts against the support structure 122, so that the bottom cover 400 has a protective effect on the air permeable membrane 200, preventing the air permeable membrane 200 (that is, the air permeable membrane 200 is located between the bottom cover 400 and the top cover 300) from being directly damaged by external impurities or foreign matter.

[0040] In some embodiments, Figure 1 , Figure 2 ,as well as Figure 3As shown, the explosion-proof valve also includes a nut 500 threadedly connected to the outer wall of the valve body 110, that is, the outer wall of the valve body 110 is provided with a threaded portion corresponding to the nut 500; that is, the nut 500 is matched with the valve body 100 and assembled to the device carrying the battery pack, and the nut 500 is locked on the inside to avoid falling off or losing under different working conditions.

[0041] Furthermore, if Figure 1 , Figure 2 ,as well as Figure 3 As shown, the explosion-proof valve further includes a sealing ring 600. A groove 510 is formed between the nut 500 and the valve body 110; optionally, the groove 510 is an annular groove. The sealing ring 600 is disposed in the groove 510 and abuts against the nut 500 and the valve body 110, that is, the sealing ring 600 abuts against the three inner walls of the groove 510 and the nut 500, thereby achieving a sealing effect.

[0042] In some embodiments, the sealing ring 600 can be covered and sleeved on the outer wall of the valve body 110 by injection molding, so as to form an integrated rubber-encapsulated structure with the valve body 100 .

[0043] In summary, the utility model provides a new type of needle-puncture explosion-proof valve, including a valve body and a breathable membrane. The valve body includes a valve body main body and a needle-puncture structure that are interconnected: wherein the valve body main body is provided with a breathable channel, the needle-puncture structure is arranged in the breathable channel, and the needle-puncture structure includes a needle-puncture and a support structure arranged around the needle-puncture. The breathable membrane is fixed to the valve body main body, covers the needle-puncture, and abuts against the support structure. The utility model supports the breathable membrane by arranging a support structure around the needle-puncture, so that when the internal air pressure of the battery pack reaches a certain level, the breathable membrane will undergo a certain deformation, causing the needle-puncture to puncture the breathable membrane, and the support structure can ensure that the deformation of the breathable membrane under different working conditions is constant, that is, the valve opening pressure is constant and is not affected by the change in the air permeability of the explosion-proof valve, and then the stable valve opening pressure of the explosion-proof valve ensures the safety performance of the equipment carrying the battery pack and improves the protection level of battery packs with different structures.

[0044] In the embodiments of the present invention, the terms "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "side", "bottom", "inside", and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0046] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0047] The above embodiments are only used to illustrate the present invention, not to limit the scope of the present invention. Any modifications or changes that do not violate the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A new type of needle-puncture explosion-proof valve, characterized in that: include: A valve body, comprising a valve body main body and a needle-piercing structure connected to each other: wherein the valve body main body is provided with an air-permeable channel, the needle-piercing structure is arranged in the air-permeable channel, and the needle-piercing structure comprises needles and a supporting structure arranged around the needles; and The breathable membrane is fixed to the valve body, covers the punctures, and abuts against the support structure.

2. The novel needle-puncture explosion-proof valve according to claim 1 is characterized in that: Also includes: The top cover is fixed to the valve body, is located in the air permeable channel, and is located on a side of the air permeable membrane that is not in contact with the supporting structure.

3. The novel needle-puncture explosion-proof valve according to claim 2 is characterized in that: The top cover is fixed to the inner wall of the valve body by heat riveting.

4. The novel needle-puncture explosion-proof valve according to claim 2 is characterized in that: The top cover covers the breathable membrane, and there is a gap between the top cover and the breathable membrane.

5. The novel needle-puncture explosion-proof valve according to claim 1 is characterized in that: Also includes: The bottom cover is detachably connected to the valve body, is located in the air permeable channel, and is located on a side of the air permeable membrane that abuts against the supporting structure.

6. The novel needle-puncture explosion-proof valve according to claim 5 is characterized in that: The bottom cover is clamped and fixed with the valve body.

7. The novel needle-puncture explosion-proof valve according to claim 1 is characterized in that: Also includes: A nut is threadedly connected to the outer wall of the valve body.

8. The novel needle-puncture explosion-proof valve according to claim 7 is characterized in that: Also includes: A sealing ring is arranged in a groove formed between the nut and the valve body, and is in contact with the nut and the valve body.

9. The novel needle-puncture explosion-proof valve according to claim 1 is characterized in that: The needling and the supporting structure are integrally formed.

10. The novel needle-puncture explosion-proof valve according to any one of claims 1 to 9, characterized in that: The air-permeable membrane is fixed to the inner wall of the valve body by heat sealing.

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