A waterproof and breathable explosion-proof umbrella-shaped valve

Abstract

The utility model discloses a kind of umbrella-shaped waterproof and breathable explosion-proof valves, it includes: valve main body, the valve main body lower end has connecting part, and is fixed on battery pack box body by connecting part;The upper end of the valve main body has umbrella-shaped part that can produce elastic deformation, the umbrella-shaped part outer edge is pressed against with the surface of battery pack box body to form sealed contact, and cover the pressure relief hole set on battery pack box body;The valve main body is further provided with through upper and lower ends and the ventilation hole of the intercommunication battery pack box body inner chamber;Waterproof and breathable membrane, it is fixed in valve main body, and cover the ventilation hole described.The utility model structure is extremely simple, and the number of parts is less, only has two parts, production cost is low, and not only can realize explosion-proof pressure relief function, also has waterproof and breathable to realize air pressure balance function, make the utility model have extremely strong market competitiveness.

Description

Technical fields:

[0001] This utility model relates to the technical field of explosion-proof valve products, and specifically to an umbrella-shaped waterproof and breathable explosion-proof valve. Background technology:

[0002] With technological advancements, batteries are widely used in electric vehicles, electric bicycles, portable energy storage, industrial energy storage, electric motorcycles, vacuum cleaners, and other technological products. Battery safety is also crucial to human life. Due to the high energy density of new energy power batteries, during battery pack use, if an internal cell experiences a short circuit due to external influences, it can cause thermal runaway, generating large amounts of high-temperature gas and flames. This leads to a rapid increase in internal pressure exceeding safety limits, affecting battery safety. If the pressure cannot be released in time, it can cause more serious battery combustion or even fire accidents. Therefore, it is essential to quickly release the rapidly increasing pressure inside the battery pack.

[0003] Chinese utility model application No. 202420283392.6 discloses an umbrella-type explosion-proof valve, which includes a support base, a sealing ring installed on the outside of the support base, an inner cavity and an outer cavity respectively provided on both sides of the support base, an umbrella valve mounting hole and several pressure relief grooves provided between the inner cavity and the outer cavity, an umbrella valve installed in the umbrella valve mounting hole and covering the pressure relief grooves, the umbrella valve and the support base are coaxially arranged, and the side of the umbrella valve facing the pressure relief groove is provided with a pressure relief guide arc relative to the pressure relief groove to guide the airflow from below the valve disc to the outside, and several exhaust channels are provided on the support base for connecting the outer cavity. Through the pressure relief grooves, pressure relief guide arcs and exhaust channels, the internal high-temperature airflow flows out rapidly along the guiding direction to achieve the effect of rapid pressure relief, while the detonation point pressure is low and the leakage flow is high.

[0004] However, the aforementioned umbrella-shaped explosion-proof valve has some shortcomings:

[0005] 1. The aforementioned umbrella-shaped explosion-proof valve includes a bracket base and is installed on the battery pack housing via the bracket base. It also needs to form a sealed assembly with the battery pack via a sealing ring. This design has a large number of parts due to the addition of the bracket base and sealing ring. The bracket base structure is also complex, making it relatively difficult to manufacture and costly.

[0006] 2. Although the above-mentioned umbrella-type explosion-proof valve also uses an umbrella valve, the umbrella valve does not have waterproof and breathable functions, and it cannot meet the user requirements of consumers. Utility Model Content:

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an umbrella-shaped waterproof, breathable and explosion-proof valve.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The umbrella-shaped waterproof, breathable, and explosion-proof valve includes: a valve body, the lower end of which has a connecting part and is fixed to the battery pack housing through the connecting part; the upper end of the valve body has an umbrella-shaped part that can produce elastic deformation, the outer edge of which abuts against the surface of the battery pack housing to form a sealed contact and covers the pressure relief hole provided on the battery pack housing; the valve body is also provided with a vent hole that runs through the upper and lower ends and connects to the inner cavity of the battery pack housing; and a waterproof and breathable membrane, which is fixed inside the valve body and covers the vent hole.

[0009] Furthermore, in the above technical solution, the valve body is integrally formed from an elastic material.

[0010] Furthermore, in the above technical solution, the wall thickness of the umbrella-shaped portion gradually decreases from the middle to the outer edge.

[0011] Furthermore, in the above technical solution, the connecting part is installed with the battery pack housing by a snap-fit ​​method; or, the connecting part is installed with the battery pack housing by a screw-fixing method.

[0012] Furthermore, in the above technical solution, a groove is provided at the lower end of the connecting part, and several vent holes are opened at the bottom of the groove to penetrate the upper surface of the valve body; the waterproof and breathable membrane is fixed in the groove.

[0013] Furthermore, in the above technical solution, a stepped groove is also provided in the groove. The outer edge of the waterproof and breathable membrane is fixed to the bottom of the stepped groove by adhesive, hot pressing, welding, or integral vulcanization with the valve body, and a gap is formed between the waterproof and breathable membrane and the bottom of the groove.

[0014] Furthermore, in the above technical solution, an annular groove is provided in the middle of the periphery of the connecting part, and multiple spaced claws are provided in the lower periphery of the connecting part. The connecting part is inserted into the mounting hole on the battery pack housing. After the claws pass over the mounting hole, they are snapped and fixed to the inner edge of the lower opening of the mounting hole. The inner wall of the mounting hole is engaged in the annular groove, so that the valve body is fixed on the battery pack housing.

[0015] Furthermore, in the above technical solution, the width of the annular slot is greater than the wall thickness of the battery pack housing.

[0016] Furthermore, in the above technical solution, the periphery of the claw is provided with an inclined guide surface.

[0017] Furthermore, in the above technical solution, the outer surface of the umbrella-shaped part is set as an inclined surface.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the present invention has an extremely simple structure and a small number of parts, with only two parts, resulting in low manufacturing cost. In addition to achieving explosion-proof pressure relief function, it also has waterproof and breathable functions to achieve air pressure balance, giving the present invention a strong market competitiveness. Attached image description:

[0019] Figure 1 This is an assembly drawing of the present invention and the battery pack housing;

[0020] Figure 2 This is an assembly and disassembly diagram of the present invention and the battery pack housing;

[0021] Figure 3 This is an assembly cross-sectional view of the present invention and the battery pack housing;

[0022] Figure 4 This is a perspective view of the present invention;

[0023] Figure 5 This is an exploded perspective view of the present invention;

[0024] Figure 6 This is a cross-sectional view of the present invention;

[0025] Figure 7 This is a perspective view of the present invention from another angle. Detailed implementation method:

[0026] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0027] See Figure 1-7 As shown, an umbrella-shaped waterproof and breathable explosion-proof valve includes: a valve body 1 and a waterproof and breathable membrane 2.

[0028] The valve body 1 has a connecting part 11 at its lower end, which is fixed to the battery pack housing 3. The valve body 1 has an umbrella-shaped part 12 at its upper end, which can produce elastic deformation. The outer edge of the umbrella-shaped part 12 presses against the surface of the battery pack housing 3 to form a sealed contact and covers the pressure relief hole 31 provided on the battery pack housing 3. The valve body 1 is also provided with a vent hole 13 that runs through the upper and lower ends and connects to the inner cavity of the battery pack housing 3. The waterproof and breathable membrane 2 is fixed inside the valve body 1 and covers the vent hole 13. In use, this utility model is fixed to the battery pack housing 3 by the connecting part 11 at the lower end of the valve body 1, and the outer edge of the umbrella-shaped part 12 abuts against the surface of the battery pack housing 3 to form a sealed contact, and covers the pressure relief hole 31 provided on the battery pack housing 3 to complete the assembly; under normal conditions, when the air pressure inside the battery pack housing 3 fluctuates due to changes in ambient temperature, air can be vented through the waterproof and breathable membrane 2 and then through the vent hole 1 of the valve body 1 to achieve air pressure balance function. Its waterproof and breathable function is similar to that of traditional spring-type explosion-proof valves. The same principle applies; when the internal air pressure of the battery pack housing 3 increases rapidly, the gas pressure overcomes the elastic stress of the umbrella-shaped part 12 of the valve body 1 through the pressure relief hole 31 of the battery pack housing 3, driving the outer edge of the umbrella-shaped part 12 to open outward and form a pressure relief gap with the surface of the battery pack housing 3, thereby achieving the explosion-proof pressure relief function; after the pressure relief is completed, the umbrella-shaped part 12 can be reset by its own elasticity to press against the surface of the battery pack housing 3 again to form a sealed contact and seal the pressure relief hole 31 on the battery pack housing 3, achieving the purpose of reuse. This utility model has an extremely simple structure and few parts, with only two parts, resulting in low manufacturing cost. In addition to achieving the explosion-proof pressure relief function, it also has a waterproof and breathable function to achieve air pressure balance, giving this utility model a strong market competitiveness.

[0029] The valve body 1 is integrally molded from an elastic material, making its manufacturing extremely simple. This elastic material can be one of silicone, silicone rubber, or rubber; other types of elastic materials are also possible, but will not be detailed here. This embodiment, as a preferred embodiment, uses an integrally molded rubber valve body 1.

[0030] The connecting part 11 is installed with the battery pack housing 3 by means of a snap-fit ​​fastener; or, the connecting part 11 is installed with the battery pack housing 3 by means of a screw fastener. This embodiment, as an effective embodiment, uses the method of installing the connecting part 11 with the battery pack housing 3 by means of a snap-fit ​​fastener fastener.

[0031] Specifically, the connecting part 11 has an annular groove 113 in the middle of its periphery, and multiple spaced claws 114 are provided at the lower periphery of the connecting part 11. The connecting part 11 is inserted into the mounting hole 32 on the battery pack housing 3. After the claws 114 are deformed, they pass over the mounting hole 32 and then reset to be fixed to the inner edge of the lower opening of the mounting hole 32. The inner wall of the mounting hole 32 is engaged in the annular groove 113, so that the valve body 1 is fixed on the battery pack housing 3. Its assembly structure is simple and the installation is stable.

[0032] The width of the annular groove 113 is greater than the wall thickness of the battery pack housing 3 to adapt to it, which enables the connecting part 11 to form a stable assembly with the battery pack housing 3.

[0033] The claw 114 is provided with an inclined guide surface 115 on its periphery, which can be better deformed to pass over the mounting hole 32.

[0034] The pressure relief holes 31 are distributed around the mounting holes 32. In this embodiment, there are three pressure relief holes 31, which are oval in shape. Of course, the number of pressure relief holes 31 can also be four, five, six, etc., and the number is not limited. The pressure relief holes 31 can also be circular or other shapes, and there is no specific limitation.

[0035] The outer surface of the umbrella-shaped part 12 is set as an inclined surface 121, so that the present invention has the function of not easily accumulating dust and dirt.

[0036] The wall thickness of the umbrella-shaped part 12 gradually decreases from the middle to the outer edge, meaning that the thickness of the middle part of the umbrella-shaped part 12 is large and the thickness of the outer edge is small. This ensures the structural strength of the entire umbrella-shaped part 12, allowing it to fit snugly onto the battery pack housing 3 and ensuring the stability of the assembly structure. Furthermore, the small outer edge thickness of the umbrella-shaped part 12 provides better elastic deformation capability, resulting in a better sealing effect between the umbrella-shaped part 12 and the battery pack housing 3.

[0037] The assembly structure of the waterproof and breathable membrane 2 and the valve body 1 is as follows:

[0038] The lower end of the connecting part 11 is provided with a groove 111, and the bottom of the groove 111 is provided with a plurality of vent holes 13 that pass through the upper surface of the valve body 1; the waterproof and breathable membrane 2 is fixed in the groove 111.

[0039] More specifically, a stepped groove 112 is also provided in the groove 111. The outer edge of the waterproof and breathable membrane 2 is fixed to the bottom of the stepped groove 112 by adhesive, hot pressing, welding, or integral vulcanization with the valve body 1. A gap is formed between the waterproof and breathable membrane 2 and the bottom of the groove 111.

[0040] In summary, this utility model has an extremely simple structure and few parts, consisting of only two components, resulting in low manufacturing costs. Furthermore, it not only achieves explosion-proof and pressure-relief functions but also provides waterproof and breathable properties to achieve air pressure balance, giving this utility model a strong competitive edge in the market.

[0041] 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. An umbrella-shaped waterproof, breathable, and explosion-proof valve, characterized in that: It includes: The valve body (1) has a connecting part (11) at its lower end and is fixed to the battery pack housing (3) through the connecting part (11); the valve body (1) has an umbrella-shaped part (12) at its upper end that can produce elastic deformation, the outer edge of the umbrella-shaped part (12) abuts against the surface of the battery pack housing (3) to form a sealed contact and covers the pressure relief hole (31) provided on the battery pack housing (3); the valve body (1) is also provided with a vent hole (13) that runs through the upper and lower ends and connects to the inner cavity of the battery pack housing (3); A waterproof and breathable membrane (2) is fixed inside the valve body (1) and covers the vent (13).

2. The umbrella-shaped waterproof, breathable, and explosion-proof valve according to claim 1, characterized in that: The valve body (1) is integrally formed from an elastic material.

3. The umbrella-shaped waterproof, breathable, and explosion-proof valve according to claim 1, characterized in that: The wall thickness of the umbrella-shaped part (12) gradually decreases from the middle to the outer edge.

4. The umbrella-shaped waterproof, breathable, and explosion-proof valve according to claim 1, characterized in that: The connecting part (11) is installed with the battery pack housing (3) by a snap-fit ​​method; or, the connecting part (11) is installed with the battery pack housing (3) by a screw-fixing method.

5. An umbrella-shaped waterproof, breathable, and explosion-proof valve according to any one of claims 1-4, characterized in that: The lower end of the connecting part (11) is provided with a groove (111), and the bottom of the groove (111) is provided with a plurality of vent holes (13) that pass through the upper surface of the valve body (1); the waterproof and breathable membrane (2) is fixed in the groove (111).

6. The umbrella-shaped waterproof, breathable, and explosion-proof valve according to claim 5, characterized in that: The groove (111) is also provided with a stepped groove (112). The outer edge of the waterproof and breathable membrane (2) is fixed to the bottom of the stepped groove (112) by adhesive, hot pressing, welding, or integral vulcanization with the valve body (1). A gap is formed between the waterproof and breathable membrane (2) and the bottom of the groove (111).

7. The umbrella-shaped waterproof, breathable, and explosion-proof valve according to claim 5, characterized in that: The connecting part (11) is provided with an annular groove (113) in the middle of its periphery, and a plurality of spaced claws (114) are provided in the lower periphery of the connecting part (11). The connecting part (11) is inserted into the mounting hole (32) on the battery pack housing (3). After the claws (114) pass through the mounting hole (32), they are snapped and fixed to the inner edge of the lower opening of the mounting hole (32). The inner wall of the mounting hole (32) is inserted into the annular groove (113), so that the valve body (1) is fixed on the battery pack housing (3).

8. The umbrella-shaped waterproof, breathable, and explosion-proof valve according to claim 7, characterized in that: The width of the annular slot (113) is greater than the wall thickness of the battery pack housing (3).

9. The umbrella-shaped waterproof, breathable, and explosion-proof valve according to claim 7, characterized in that: An inclined guide surface (115) is provided on the periphery of the claw (114).

10. The umbrella-shaped waterproof, breathable, and explosion-proof valve according to claim 5, characterized in that: The outer surface of the umbrella-shaped part (12) is configured as an inclined surface (121).

Images