Multifunctional spring type breathable anti-explosion valve device

Abstract

The utility model relates to a multifunctional spring type ventilation anti-explosion valve device which comprises a valve body, the valve body is provided with a first guide channel penetrating in the axial direction, and an air outlet supporting assembly is assembled and connected in the first guide channel; the air outlet supporting assembly is provided with a second guide channel penetrating in the axial direction, and an air inlet supporting assembly is assembled and connected into the second guide channel. A protective cover is mounted at the top of the valve body, and a first vent hole is reserved between the protective cover and the valve body; a first spring is connected between the bottom of the air outlet supporting assembly and the bottom of the valve body, and a second spring is connected between the top of the air inlet supporting assembly and the air outlet supporting assembly. A first waterproof breathable film capable of blocking the first guide channel is arranged at the top of the valve body, and a second waterproof breathable film capable of blocking the second guide channel is arranged at the top of the air outlet supporting assembly. Compared with the prior art, circulation and exchange of gas can be achieved under different pressure intensities, and the waterproof function, the ventilation function, the explosion-proof function and the like are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof valves, in particular to a multifunctional spring type breathable explosion-proof valve device. Background Art

[0002] At present, due to altitude and internal and external temperature differences during the use of electric vehicles, there is a problem of internal and external pressure difference in the battery pack. If the internal and external pressures are not balanced in time, the battery pack may be compressed and deformed or expanded and burst under the action of the pressure difference. At the same time, if the internal battery chip unit fails, a large amount of gas will be released. If these gases are not discharged to the outside in time, the internal pressure will rise sharply in a short time, resulting in the bursting or even explosion of the battery pack, which will affect the personal safety of passengers. Therefore, a humidity control explosion-proof breathable valve must be installed outside the battery pack to connect the inside of the battery pack and the outside air for pressure balance, reduce the condensate water in the battery pack, and ensure its explosion-proof function in an emergency state.

[0003] In addition, the environment where the vehicle travels may be muddy, dusty, and waterlogged, so the explosion-proof valve also needs to have the functions of waterproof and dustproof. The existing explosion-proof valve adopts the axial arrangement of three springs to reduce the exchange frequency of internal and external gases in the battery pack. This solution has a high cost, and when the battery thermal runaway occurs, the ejected particles will pollute the environment.

[0004] Therefore, it is still necessary to develop an explosion-proof valve device with multifunctions such as pressure balance, dustproof, waterproof, and breathable. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a multifunctional spring type breathable explosion-proof valve device to overcome the defects that the existing explosion-proof valves cannot effectively balance multiple functions such as pressure balance, dustproof, waterproof, and breathable.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A multifunctional spring type breathable explosion-proof valve device includes a valve body. The valve body is provided with a first guiding channel that penetrates axially, and an air outlet support assembly is assembled and connected in the first guiding channel; the air outlet support assembly is provided with a second guiding channel that penetrates axially, and an air inlet support assembly is assembled and connected in the second guiding channel.

[0008] A protective cover is installed on the top of the valve body, and a first breathable hole is left between the protective cover and the valve body; a second breathable hole is left at the assembly connection of the air outlet support assembly and the valve body, and a first seal is sleeved outside the air outlet support assembly to block the second breathable hole; a third breathable hole is left at the assembly connection of the air outlet support assembly and the air inlet support assembly, and a second seal is sleeved outside the air inlet support assembly to block the third breathable hole.

[0009] A first spring is connected between the bottom of the air outlet support assembly and the bottom of the valve body, and a second spring is connected between the top of the air inlet support assembly and the air outlet support assembly;

[0010] A first waterproof breathable membrane capable of blocking the first guiding channel is provided at the top of the valve body, and a second waterproof breathable membrane capable of blocking the second guiding channel is provided at the top of the air outlet support assembly.

[0011] Furthermore, the valve body includes a valve body base surface and a valve body boss provided on the valve body base surface. Both the valve body base surface and the valve body boss are hollow structures, and the combination of the hollow structures forms the first guiding channel.

[0012] Furthermore, the protective cover is installed on the top of the valve body boss, and the first waterproof breathable membrane is installed on the top surface of the valve body boss.

[0013] Furthermore, the valve body is installed on the battery pack housing.

[0014] Still further, through holes are uniformly formed in the valve body base surface, bushings are provided in the through holes, and the valve body base surface is installed on the battery pack housing through screws passing through the bushings.

[0015] Furthermore, a third sealing member is provided at the connection between the valve body and the battery pack housing.

[0016] Still further, the first sealing member, the second sealing member, and the third sealing member are all common O-ring seals, and other common sealing structures can also be selected.

[0017] Furthermore, the air outlet support assembly includes a gas flow member capable of extending into the first guiding channel and an air outlet limiting member provided outside the first guiding channel.

[0018] Still further, the gas flow member is integrally in a columnar structure, and the second waterproof breathable membrane is covered and installed on the top surface of the gas flow member.

[0019] Furthermore, an annular first sealing groove is provided between the gas flow member and the air outlet limiting member, and the first sealing member is installed in the first sealing groove.

[0020] Furthermore, when the pressure inside the battery pack box is less than the external pressure, the first sealing member can block the second ventilation hole.

[0021] Furthermore, the air outlet limiting member includes an annular bottom surface and a plurality of first support members installed on the annular bottom surface.

[0022] Still further, the first spring is sleeved outside the air outlet limiting member, the top surface of the first spring is connected to the valve body, and the bottom surface of the first spring is connected to the annular bottom surface.

[0023] Further, a first limiting protrusion is provided on the first support member, and a first limiting extension block capable of abutting against the first limiting protrusion is provided on the valve body.

[0024] Further, the intake air support assembly includes an intake air limiting member capable of extending into the second guiding channel. The intake air limiting member includes an annular top surface and a plurality of second support members installed at the bottom of the annular top surface.

[0025] Further, the second spring is sleeved outside the intake air limiting member, and the top surface of the second spring is connected to the annular top surface.

[0026] Further, a second limiting protrusion is provided on the second support member, and a second limiting extension block capable of abutting against the second limiting protrusion is provided on the inner wall of the outlet air support assembly.

[0027] Further, the bottom surface of the second spring is connected to the second limiting extension block.

[0028] Further, a ring-shaped second sealing groove is provided on the part of the intake air support assembly extending out of the second guiding channel, and the second sealing member is installed in the second sealing groove.

[0029] Further, when the pressure in the battery pack box body is greater than the external pressure or explodes, the second sealing member can block the third ventilation hole.

[0030] Further, the air permeability and moisture permeability of the first waterproof breathable membrane are both higher than those of the second waterproof breathable membrane.

[0031] Compared with the prior art, the utility model has the following beneficial effects:

[0032] (1) The spring type air permeable explosion-proof valve device of the utility model can realize the circulation and exchange of gas at different pressures to achieve pressure balance by setting two spring valves with different ventilation directions, and achieve the explosion-proof valve functions such as waterproof, breathable and explosion-proof under the auxiliary action of the waterproof breathable membrane.

[0033] (2) Compared with the existing explosion-proof valve with three springs arranged axially, the explosion-proof valve device of the utility model can reduce the external wet air flowing into the battery pack by adding a waterproof breathable membrane with a low moisture permeability while meeting the large air permeability of thermal runaway, and can maximize the improvement of the condensation of the battery pack to prevent short circuit in the battery pack.

[0034] (3) The explosion-proof valve device of the utility model integrates two spring valves with different air permeable directions on one assembly, saves the number of connection interfaces with the battery pack, and reduces the production cost.

[0035] (4) During the entire service life of the explosion-proof valve device of the present utility model and when the battery pack undergoes thermal runaway, the waterproof and breathable membrane will not rupture, thereby avoiding the pollution of the environment by ejected particles and achieving a dust-proof effect. Compared with the traditional solution of additionally adding a filter element, the present application can greatly reduce the production cost.

[0036] (5) The two-layer waterproof and breathable membrane of the present utility model can block the entry of external moisture into the sealed box under normal conditions, effectively solving the problems of excessive humidity and condensation inside the sealed box; at the same time, the waterproof and breathable function is realized through the waterproof and breathable membrane to balance the air pressure inside and outside the sealed box, avoiding frequent opening of the piston and improving the service life of the product.

[0037] (6) The spring-type breathable explosion-proof valve device of the present utility model integrates multiple functions such as explosion-proof, waterproof and breathable, and humidity control, and has good application prospects and market competitiveness. Description of the Drawings

[0038] Figure 1 It is a schematic diagram of the bottom structure of the spring-type breathable explosion-proof valve device of the present utility model after assembly.

[0039] Figure 2 It is a schematic diagram of the top structure of the spring-type breathable explosion-proof valve device of the present utility model after assembly.

[0040] Figure 3 It is an explosion diagram of the explosion-proof valve device of the present utility model.

[0041] Figure 4 It is a schematic cross-sectional view of the explosion-proof valve device of Embodiment 2 of the present utility model.

[0042] Figure 5 It is a schematic diagram of the structure of the air outlet support assembly of Embodiment 3 of the present utility model.

[0043] Figure 6 It is an explosion diagram of a part of the air outlet support assembly of Embodiment 3 of the present utility model.

[0044] Figure 7 It is a schematic diagram of the structure of a traditional air outlet support assembly with a base.

[0045] Figure 8 It is a schematic diagram of the structure of the air inlet support assembly of Embodiment 4 of the present utility model.

[0046] Figure 9 It is a schematic diagram of the explosion-proof valve device of Embodiment 5 of the present utility model in the air inlet working state.

[0047] Figure 10 It is a schematic diagram of the explosion-proof valve device of Embodiment 5 of the present utility model in the blasting working state.

[0048] Description of the markings in the figure:

[0049] 1 - Valve body, 11 - First ventilation hole, 12 - Valve body base surface, 13 - Valve body boss, 14 - First limiting extension block, 15 - Third seal, 16 - Bushing;

[0050] 2 - Exhaust gas support assembly, 21 - Second ventilation hole, 22 - First seal, 23 - Gas flow component, 24 - Exhaust gas limiting component, 241 - Annular bottom surface, 242 - First support component, 2421 - First limiting protrusion, 25 - First seal groove, 26 - Second limiting extension block;

[0051] 3 - Intake gas support assembly, 31 - Third ventilation hole, 32 - Second seal, 33 - Intake gas limiting component, 331 - Annular top surface, 332 - Second support component, 3321 - Second limiting protrusion, 34 - Second seal groove;

[0052] 4 - Protective cover;

[0053] 5 - First spring;

[0054] 6 - Second spring;

[0055] 7 - First waterproof and breathable membrane;

[0056] 8 - Second waterproof and breathable membrane;

[0057] 9 - Base. Specific implementation mode

[0058] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present utility model, and the detailed implementation mode and specific operation process are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0059] In the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" 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 a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0060] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0061] Embodiment 1:

[0062] This embodiment provides a multifunctional spring-type breathable explosion-proof valve device, including a valve body 1. As Figure 1-3 shown, the valve body 1 is provided with a first guiding channel that penetrates axially. An air outlet support assembly 2 is assembled and connected in the first guiding channel. The air outlet support assembly 2 is provided with a second guiding channel that penetrates axially. An air inlet support assembly 3 is assembled and connected in the second guiding channel.

[0063] A protective cover 4 is installed on the top of the valve body 1. A first breathable hole 11 is left between the protective cover 4 and the valve body 1. A second breathable hole 21 is left at the assembly connection between the air outlet support assembly 2 and the valve body 1. A first seal 22 that can block the second breathable hole 21 is sleeved outside the air outlet support assembly 2. A third breathable hole 31 is left at the assembly connection between the air outlet support assembly 2 and the air inlet support assembly 3. A second seal 32 that can block the third breathable hole 31 is sleeved outside the air inlet support assembly 3. A first spring 5 is connected between the bottom of the air outlet support assembly 2 and the bottom of the valve body 1. A second spring 6 is connected between the top of the air inlet support assembly 3 and the air outlet support assembly 2. The compression directions of the first spring 5 and the second spring 6 are opposite.

[0064] A first waterproof breathable membrane 7 that can block the first guiding channel is provided at the top of the valve body 1. A second waterproof breathable membrane 8 that can block the second guiding channel is provided at the top of the air outlet support assembly 2.

[0065] When the pressure inside the battery pack box is less than the external pressure, gas with a certain humidity passes through the air vent 11 on the protective cover 4, then continuously passes through the first waterproof breathable membrane 7 with a high humidity permeability and the second waterproof breathable membrane 8 with a low humidity permeability, and then pushes open the second seal 32 and enters the battery pack through the third air vent 31. At this time, since the air passes through the second waterproof breathable membrane 8 with a low humidity permeability, the entry of moisture into the battery pack can be reduced.

[0066] When the pressure inside the battery pack box is greater than the external pressure, the gas inside the battery pack pushes open the first seal 22 after passing through the second air vent 21, flows out through the first air vent 11 after passing through the first waterproof breathable membrane 7, and finally is discharged to the atmosphere. When the internal pressure rises sharply due to thermal runaway of the battery, the eruptive gas containing solid particles pushes open the first seal 22 after passing through the second air vent 21, and then flows out through the first air vent 11 after passing through the first waterproof breathable membrane 7. At this time, the solid particles in the gas are blocked inside the breather valve, greatly reducing environmental pollution.

[0067] Embodiment 2:

[0068] This embodiment provides a multifunctional spring-type breather explosion-proof valve device, including a valve body 1. The valve body 1 is provided with a first guiding channel penetrating axially, and an air outlet support assembly 2 is assembled and connected in the first guiding channel. The air outlet support assembly 2 is provided with a second guiding channel penetrating axially, and an air inlet support assembly 3 is assembled and connected in the second guiding channel.

[0069] The valve body 1 of this embodiment includes a valve body base surface 12 and a valve body boss 13 provided on the valve body base surface 12. Both the valve body base surface 12 and the valve body boss 13 are hollow structures, that is, the first guiding channel is formed. The protective cover 4 is installed on the top of the valve body boss 13, and the first waterproof breathable membrane 5 is installed on the top surface of the valve body boss 13. The protective cover 4 of this embodiment is installed on the top of the valve body boss 13 by means of clamping, welding or glue, etc., and plays a protective role for the first waterproof breathable membrane 5.

[0070] As Figure 4 shown, the valve body 1 of this embodiment is installed on the battery pack housing. Specifically, through holes are symmetrically opened on the valve body base surface 12, and bushings 16 are provided in the through holes. The valve body base surface 12 is installed on the battery pack housing by screws passing through the bushings 16. Since the screws are metal parts, long-term action on plastic parts will cause deformation of the plastic parts, so adding the bushings 16 can make the force of the metal screws act on the metal bushings 16.

[0071] A third seal 15 is also provided at the connection between the valve body 1 of this embodiment and the battery pack housing. The third seal 15 of this embodiment is an O-ring. Since the third seal 15 is in a compressed state, it can effectively prevent leakage of gas and the like from the connection interface between the breather valve and the battery pack housing.

[0072] Embodiment 3:

[0073] This embodiment provides a multifunctional spring-type breathable explosion-proof valve device, including a valve body 1. The valve body 1 is provided with a first guiding channel penetrating along the axis, and an air outlet support assembly 2 is assembled and connected in the first guiding channel. The air outlet support assembly 2 is provided with a second guiding channel penetrating along the axis, and an air inlet support assembly 3 is assembled and connected in the second guiding channel.

[0074] A protective cover 4 is installed on the top of the valve body 1, and a first breathable hole 11 is left between the protective cover 4 and the valve body 1. A second breathable hole 21 is left at the assembly connection between the air outlet support assembly 2 and the valve body 1, and a first seal 22 capable of blocking the second breathable hole 21 is sleeved outside the air outlet support assembly 2. A third breathable hole 31 is left at the assembly connection between the air outlet support assembly 2 and the air inlet support assembly 3, and a second seal 32 capable of blocking the third breathable hole 31 is sleeved outside the air inlet support assembly 3. A first spring 5 is connected between the bottom of the air outlet support assembly 2 and the bottom of the valve body 1, and a second spring 6 is connected between the top of the air inlet support assembly 3 and the air outlet support assembly 2. A first waterproof breathable membrane 7 capable of blocking the first guiding channel is provided at the top of the valve body 1, and a second waterproof breathable membrane 8 capable of blocking the second guiding channel is provided at the top of the air outlet support assembly 2.

[0075] As Figure 5 shown, the air outlet support assembly 2 of this embodiment includes a gas flow-through member 23 that can extend into the first guiding channel and an air outlet limiting member 24 provided outside the first guiding channel. The gas flow-through member 23 is integrally columnar, and the second waterproof breathable membrane 8 is covered and installed on the top surface of the gas flow-through member 23, and the gas entering the explosion-proof valve can be humidity-controlled through the second waterproof breathable membrane 8.

[0076] The air outlet limiting member 24 includes an annular bottom surface 241 and a plurality of first support members 242 installed on the annular bottom surface 241. The first spring 5 is sleeved outside the air outlet limiting member 24, the top surface of the first spring 5 is connected to the valve body 1, and the bottom surface of the first spring 5 is connected to the annular bottom surface 241. First limit protrusions 2421 are provided on the first support members 242, and first limit extension blocks 14 capable of abutting against the first limit protrusions 2421 are provided on the valve body 1, so that the first spring 5 can be compressed and moved within a certain range, thereby driving the air outlet limiting member 24 to move up and down within a certain range.

[0077] A ring-shaped first sealing groove 25 is further provided between the gas flow-through member 23 and the air outlet limiting member 24 of this embodiment, and the first seal 22 is installed in the first sealing groove 25. The first seal 22 of this embodiment is a commonly used O-ring seal.

[0078] As Figure 6-7As shown, the traditional air outlet support assembly 2 does not have a first seal 22, so the air outlet support assembly 2 can only be fixed by setting a corresponding base 9. However, the O-ring (i.e., the first seal 22) in this embodiment can fix the air outlet spring (i.e., the first spring 5) on the air outlet support assembly 2, thus meeting the sealing performance of the product, so the corresponding base 9 can be cancelled.

[0079] Embodiment 4:

[0080] This embodiment provides a multifunctional spring-type breathable explosion-proof valve device, including a valve body 1. The valve body 1 is provided with a first guiding channel that penetrates axially, and an air outlet support assembly 2 is assembled and connected in the first guiding channel. The air outlet support assembly 2 is provided with a second guiding channel that penetrates axially, and an air inlet support assembly 3 is assembled and connected in the second guiding channel.

[0081] A protective cover 4 is installed on the top of the valve body 1, and a first breathable hole 11 is left between the protective cover 4 and the valve body 1. A second breathable hole 21 is left at the assembly connection between the air outlet support assembly 2 and the valve body 1, and a first seal 22 capable of blocking the second breathable hole 21 is sleeved outside the air outlet support assembly 2. A third breathable hole 31 is left at the assembly connection between the air outlet support assembly 2 and the air inlet support assembly 3, and a second seal 32 capable of blocking the third breathable hole 31 is sleeved outside the air inlet support assembly 3. A first spring 5 is connected between the bottom of the air outlet support assembly 2 and the bottom of the valve body 1, and a second spring 6 is connected between the top of the air inlet support assembly 3 and the air outlet support assembly 2. A first waterproof breathable membrane 7 capable of blocking the first guiding channel is provided at the top of the valve body 1, and a second waterproof breathable membrane 8 capable of blocking the second guiding channel is provided at the top of the air outlet support assembly 2.

[0082] As Figure 8 shown, the air inlet support assembly 3 in this embodiment includes an air inlet limiting member 33 that can extend into the second guiding channel. The air inlet limiting member 33 includes an annular top surface 331 and a plurality of second support members 332 installed at the bottom of the annular top surface 331. Second limiting protrusions 3321 are provided on the second support members 332, and second limiting extension blocks 26 capable of abutting against the second limiting protrusions 3321 are provided on the inner wall of the air outlet support assembly 2. The second spring 6 is sleeved outside the air inlet limiting member 33. The top surface of the second spring 6 is connected to the annular top surface 331, and the bottom surface of the second spring 6 is connected to the second limiting extension block 26.

[0083] A ring-shaped second seal groove 34 is provided on the part of the air inlet support assembly 3 that extends out of the second guiding channel, and the second seal 32 is installed in the second seal groove 34. The second seal 32 in this embodiment is a commonly used O-ring for sealing.

[0084] Embodiment 5:

[0085] This embodiment provides a multifunctional spring-type breathable explosion-proof valve device, including a valve body 1. The valve body 1 is provided with a first guiding channel that penetrates axially, and an air outlet support assembly 2 is assembled and connected in the first guiding channel. The air outlet support assembly 2 is provided with a second guiding channel that penetrates axially, and an air inlet support assembly 3 is assembled and connected in the second guiding channel. The top of the valve body 1 is provided with a first waterproof breathable membrane 7 that can block the first guiding channel, and the top of the air outlet support assembly 2 is provided with a second waterproof breathable membrane 8 that can block the second guiding channel. The first waterproof breathable membrane 7 and the second waterproof breathable membrane 8 can be installed in corresponding positions by forms such as ultrasonic welding, adhesives, or in-mold injection.

[0086] The difference from the above embodiment is that the air permeability and moisture permeability of the first waterproof breathable membrane 7 in this embodiment are both higher than those of the second waterproof breathable membrane 8. By arranging two membrane sheets with different air permeability and moisture permeability, while meeting the large air permeability during thermal runaway, a second waterproof breathable membrane 8 with a low moisture permeability rate is added to reduce the external wet air flowing into the battery pack, so as to maximize the improvement of the condensation of the battery pack and prevent internal short circuit of the battery pack.

[0087] The working principle of the spring-type breathable explosion-proof valve device in this embodiment is specifically as follows:

[0088] The spring-type breathable explosion-proof valve of the present invention can prevent humid air from entering the battery pack under certain circumstances in the vehicle environment due to the arrangement of two spring valves with different ventilation directions. Due to having a double-layer waterproof breathable membrane, external liquid water cannot enter the battery pack.

[0089] As Figure 9 shown, when the pressure in the battery pack box is less than the external pressure and reaches a certain value, the gas with a certain humidity in the atmosphere passes through the air vent 11 on the protective cover 4, then continuously passes through the first waterproof breathable membrane 7 with a high moisture permeability rate and the second waterproof breathable membrane 8 with a low moisture permeability rate, and then pushes open the O-ring seal (second seal 32) and enters the battery pack through the third air vent 31. At this time, since the air passes through the second waterproof breathable membrane 8 with a low moisture permeability rate, the moisture entering the battery pack can be reduced.

[0090] As Figure 10 shown, when the pressure in the battery pack box is greater than the external pressure and reaches a certain value, the gas in the battery pack pushes open the O-ring seal (first seal 22) through the second air vent 21, only passes through the first waterproof breathable membrane 7 and then flows out through the first air vent 11, and finally discharges to the atmosphere.

[0091] When the internal pressure rises sharply due to battery thermal runaway, the ejected gas containing solid particles passes through the second ventilation hole 21 and then pushes open the first seal 22. Due to the greater pressure, the spring is compressed more, and the O-ring seal is pushed open further. Then, it flows out through the first ventilation hole 11 after passing through the first waterproof and breathable membrane 7. Due to the filtering effect of the first waterproof and breathable membrane 7, the solid particles in the gas are blocked inside the ventilation valve, greatly reducing environmental pollution.

[0092] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A multifunctional spring-type air-permeable explosion-proof valve device, comprising a valve body (1), characterized in that: The valve body (1) is provided with a first guide channel extending in the axial direction, and an air outlet support assembly (2) is assembled and connected in the first guide channel; the air outlet support assembly (2) is provided with a second guide channel extending in the axial direction, and an air inlet support assembly (3) is assembled and connected in the second guide channel; A protective cover (4) is installed on the top of the valve body (1), and a first air vent (11) is left between the protective cover (4) and the valve body (1); a second air vent (21) is left at the assembly connection between the air outlet support assembly (2) and the valve body (1), and a first sealing member (22) capable of blocking the second air vent (21) is provided on the outer sleeve of the air outlet support assembly (2); a third air vent (31) is left at the assembly connection between the air outlet support assembly (2) and the air inlet support assembly (3), and a second sealing member (32) capable of blocking the third air vent (31) is provided on the outer sleeve of the air inlet support assembly (3); A first spring (5) is connected between the bottom of the air outlet support assembly (2) and the bottom of the valve body (1), and a second spring (6) is connected between the top of the air inlet support assembly (3) and the air outlet support assembly (2); The top of the valve body (1) is provided with a first waterproof and breathable membrane (7) capable of blocking the first guide channel, and the top of the air outlet support assembly (2) is provided with a second waterproof and breathable membrane (8) capable of blocking the second guide channel.

2. A multifunctional spring-type air-permeable explosion-proof valve device according to claim 1, characterized in that: The valve body (1) comprises a valve body base surface (12) and a valve body boss (13) arranged on the valve body base surface (12); the valve body base surface (12) and the valve body boss (13) are both hollow structures; The protective cover (4) is installed on the top of the valve body boss (13), and the first waterproof and breathable membrane (7) is installed on the top surface of the valve body boss (13).

3. A multifunctional spring-type air-permeable explosion-proof valve device according to claim 1, characterized in that: The valve body (1) is mounted on the battery pack shell, and a third sealing member (15) is provided at the connection between the valve body (1) and the battery pack shell.

4. A multifunctional spring-type air-permeable explosion-proof valve device according to claim 1, characterized in that: The gas outlet support assembly (2) comprises a gas flow member (23) capable of extending into the first guide channel and a gas outlet stopper (24) arranged outside the first guide channel; The gas circulation member (23) is a columnar structure as a whole, and the second waterproof and breathable membrane (8) is installed and covers the top surface of the gas circulation member (23); An annular first sealing groove (25) is also provided between the gas circulation member (23) and the gas outlet limiting member (24), and the first sealing member (22) is installed in the first sealing groove (25).

5. A multifunctional spring-type air-permeable explosion-proof valve device according to claim 4, characterized in that: The air outlet limiting member (24) comprises an annular bottom surface (241) and a plurality of first supporting members (242) mounted on the annular bottom surface (241); The first spring (5) is sleeved outside the air outlet limiting component (24), the top surface of the first spring (5) is connected to the valve body (1), and the bottom surface of the first spring (5) is connected to the annular bottom surface (241).

6. A multifunctional spring-type air-permeable explosion-proof valve device according to claim 5, characterized in that: The first support member (242) is provided with a first limiting protrusion (2421), and the valve body (1) is provided with a first limiting extension block (14) capable of abutting against the first limiting protrusion (2421).

7. A multifunctional spring-type air-permeable explosion-proof valve device according to claim 1, characterized in that: The air intake support assembly (3) comprises an air intake stopper (33) capable of extending into the second guide channel, the air intake stopper (33) comprising an annular top surface (331) and a plurality of second support members (332) mounted on the bottom of the annular top surface (331); The second spring (6) is sleeved outside the air intake limiter (33), and the top surface of the second spring (6) is connected to the annular top surface (331).

8. A multifunctional spring-type air-permeable explosion-proof valve device according to claim 7, characterized in that: The second support member (332) is provided with a second limiting protrusion (3321), and the inner wall of the air outlet support assembly (2) is provided with a second limiting extension block (26) capable of abutting against the second limiting protrusion (3321); The bottom surface of the second spring (6) is connected to the second limiting extension block (26).

9. The multifunctional spring-type air-permeable explosion-proof valve device according to claim 7, characterized in that: The portion of the air intake support assembly (3) extending out of the second guide channel is provided with an annular second sealing groove (34), and the second sealing member (32) is installed in the second sealing groove (34).

10. A multifunctional spring-type air-permeable explosion-proof valve device according to claim 1, characterized in that: The air permeability and moisture permeability of the first waterproof breathable membrane (7) are both higher than those of the second waterproof breathable membrane (8).

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