A type of umbrella-shaped explosion-proof and breathable valve

Abstract

This utility model relates to an explosion-proof and breathable diaphragm valve, comprising: a valve seat and a valve body; an exhaust channel is provided on the valve seat, and an umbrella-shaped diaphragm is provided on the valve body. The umbrella-shaped diaphragm is open at one end, with the open end facing the exhaust channel. When the umbrella-shaped diaphragm is in its initial state, it closes the exhaust channel. A connecting hole is provided on the valve seat, and a reset mechanism is provided on the valve body. The reset mechanism is movably connected to the connecting hole and abuts against the valve seat. By providing an umbrella-shaped diaphragm on the valve body, this application enables the umbrella-shaped diaphragm to deform and open the exhaust channel when the pressure inside the battery pack exceeds the deformation threshold of the diaphragm, allowing gas to be discharged to the outside through the exhaust channel. Furthermore, when the pressure inside the battery pack is too high, the gas can push the valve body, causing the valve body to separate from the valve seat, further improving the pressure relief capacity.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, and more specifically, to a diaphragm explosion-proof vent valve. Background Technology

[0002] With the continuous development of energy storage technology, battery packs are increasingly widely used in electric vehicles, portable computing devices, and other electrical equipment. A battery pack contains multiple individual cells. These cells may experience thermal runaway under conditions such as overheating or mechanical abuse. Thermal runaway is accompanied by the release of large amounts of gas and heat. To prevent the sealed battery pack from being subjected to excessive pressure and exploding, an explosion-proof vent valve is required for active pressure relief. Based on the structural characteristics and safety requirements of the battery pack, the explosion-proof vent valve needs to meet requirements for sealing, appropriate opening pressure, and a sufficiently large pressure relief cross-section. After the pressure relief and venting of a single cell are completed, the explosion-proof vent valve closes to prevent external oxygen from entering.

[0003] Currently, battery packs typically use either spring-loaded or pin-type burst-type pressure relief valves. Pin-type burst-type valves have a higher burst pressure, but the burst pressure consistency is poor. When the vent membrane inside the pin-type valve ruptures, the inside and outside of the battery pack become interconnected, allowing a large amount of oxygen to enter and participate in the reaction, potentially causing further combustion inside the battery pack. Therefore, spring-loaded valves are generally preferred. However, spring-loaded valves require the internal pressure of the battery pack to exceed the spring's force before they can activate. When the internal pressure is low, they cannot release pressure, leading to gas buildup and increased internal pressure. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a diaphragm explosion-proof vent valve. By setting a diaphragm on the valve body, when the pressure inside the battery pack exceeds the deformation threshold of the diaphragm, the diaphragm deforms and opens the exhaust channel, allowing gas to be discharged to the outside. Furthermore, when the pressure inside the battery pack is too high, the gas can push the valve body, causing the valve body to separate from the valve seat, thereby further improving the pressure relief capacity.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a diaphragm explosion-proof and breathable valve, comprising: a valve seat and a valve body; an exhaust channel is provided on the valve seat, and a diaphragm is provided on the valve body, the diaphragm being umbrella-shaped with one end open, the open end of the diaphragm facing the exhaust channel, and the diaphragm closing the exhaust channel when in its initial state; a connecting hole is provided on the valve seat, and a reset mechanism is provided on the valve body, the reset mechanism being movably connected to the connecting hole, and the reset mechanism abutting against the valve seat.

[0006] Specifically, when the pressure inside the battery pack is sufficient to deform the diaphragm, the gas inside the battery pack pushes the outer side of the diaphragm upwards, opening the exhaust channel. The gas inside the battery pack can then be discharged to the outside through the exhaust channel. When the pressure inside the battery pack is insufficient to deform the diaphragm, the diaphragm returns to its original shape and closes the exhaust channel. When the pressure inside the battery pack is too high, after deforming the diaphragm, sufficient pressure is applied to the valve body to activate the reset mechanism. The reset mechanism deforms, the valve body separates from the valve seat, and the gas can directly pass through the gap between the valve body and the valve seat, achieving rapid pressure relief.

[0007] By installing a diaphragm on the valve body, when the pressure inside the battery pack exceeds the deformation threshold of the diaphragm, the diaphragm deforms and opens the exhaust channel, allowing gas to be discharged to the outside. Furthermore, when the pressure inside the battery pack is too high, the gas can push the valve body, causing the valve body to separate from the valve seat, further improving the pressure relief capability.

[0008] Optionally, the reset mechanism includes: a movable rod and a reset spring; one end of the movable rod passes through the connecting hole and is fixed to the valve body, the reset spring is sleeved on the movable rod, one end of the reset spring is fixed to the other end of the movable rod, and the other end of the reset spring abuts against the valve seat.

[0009] Specifically, when the pressure inside the battery pack is too high, the air pressure pushes the valve body, causing the movable rod to move within the connecting hole. The return spring is compressed, and at this time, the valve body separates from the valve seat, allowing gas to pass through the gap between the valve body and the valve seat. When the pressure inside the battery pack is insufficient to move the valve body, the return spring resets and pushes the movable rod back to its original position. The movable rod then pulls the valve body back to its original position, sealing the gap between the valve body and the valve seat.

[0010] Optionally, the valve body includes: a top cover and a connecting seat; the top cover is provided with a mounting flange, the connecting seat is provided with a groove corresponding to the mounting flange, the mounting flange is fitted into the groove, the movable rod is fixed to the connecting seat, and the diaphragm is disposed on the connecting seat and located outside the movable rod.

[0011] Specifically, during assembly, the diaphragm is first installed on the connector, and then the mounting flange of the top cover is fitted into the groove of the connector to complete the assembly of the valve body and the diaphragm.

[0012] Optionally, the umbrella membrane is provided with a stepped hole, the stepped hole having a first diameter portion and a second diameter portion, the first diameter portion being fitted with the connecting seat, the second diameter portion being fitted with the movable rod, and the movable rod being provided with a limiting block for restricting the position of the umbrella membrane.

[0013] Specifically, when installing the umbrella membrane, first fit the first aperture portion of the umbrella membrane into the connecting seat, then insert the movable rod into the stepped hole so that the second aperture portion fits against the outer surface of the movable rod. The limiting block can limit the end of the umbrella membrane away from the connecting seat, thereby fixing the position of the umbrella membrane.

[0014] Optionally, the movable rod is provided with a vent hole, the top cover and the connecting seat are in corresponding contact to form an exhaust chamber, the vent hole is connected to the exhaust chamber, and at least one exhaust hole is provided on the side of the top cover, and all exhaust holes are connected to the exhaust chamber.

[0015] Specifically, when the air pressure inside the battery pack is too low to push the diaphragm, the gas inside the battery pack can enter the exhaust chamber through the vent and be discharged from the exhaust port, which can prevent excessive gas from accumulating during normal operation of the battery pack.

[0016] Optionally, a waterproof and breathable membrane is provided inside the exhaust chamber and at the connecting hole.

[0017] Specifically, by setting up a waterproof and breathable membrane, the connecting holes can be covered, preventing external moisture from entering the battery pack through the connecting holes. The waterproof and breathable membrane is pressed tightly into the groove by the mounting flange.

[0018] Optionally, the valve seat has a through hole and an exhaust groove on its side wall. The through hole and the exhaust groove communicate to form the exhaust channel. The diaphragm overlaps the valve seat, and when the diaphragm is in its initial state, the diaphragm closes the through hole.

[0019] Specifically, when the valve body is installed on the battery pack, the battery pack is connected to the valve seat through the through hole. When the air pressure inside the battery pack is sufficient to push the diaphragm, the gas pushes the diaphragm through the through hole, causing the diaphragm to deform. One open end of the diaphragm separates from the valve body, and the gas passes through the gap between the diaphragm and the valve seat and is discharged from the exhaust groove.

[0020] Optionally, an outer sealing ring is provided on the valve seat at the end opposite to the valve body.

[0021] Specifically, by setting an external sealing ring, the airtightness of the connection between the valve body and the battery pack can be improved.

[0022] In summary, this invention has the following beneficial effects: When the pressure inside the battery pack is sufficient to deform the diaphragm, the gas inside the battery pack pushes the outer side of the diaphragm upwards, opening the exhaust channel. The gas inside the battery pack can then be discharged to the outside through the exhaust channel. When the pressure inside the battery pack is insufficient to deform the diaphragm, the diaphragm returns to its original shape and closes the exhaust channel. When the pressure inside the battery pack is too high, after the diaphragm deforms, sufficient pressure is applied to the valve body to drive the reset mechanism. The reset mechanism deforms, the valve body separates from the valve seat, and the gas can directly pass through the gap between the valve body and the valve seat, achieving rapid pressure relief. By providing a diaphragm on the valve body, when the pressure inside the battery pack exceeds the deformation threshold of the diaphragm, the diaphragm deforms and opens the exhaust channel, allowing the gas to be discharged to the outside through the exhaust channel. Furthermore, when the pressure inside the battery pack is too high, the gas can push the valve body, causing the valve body to separate from the valve seat, further improving the pressure relief capacity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the umbrella membrane explosion-proof vent valve in a closed state according to an embodiment of this utility model;

[0024] Figure 2 This is a cross-sectional view of the umbrella-shaped explosion-proof and breathable valve in a closed state according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the overall structure of the umbrella membrane explosion-proof vent valve in the open state according to an embodiment of this utility model;

[0026] Figure 4 This is a cross-sectional view of the umbrella-shaped explosion-proof and breathable valve in the open state according to an embodiment of the present invention.

[0027] In the diagram: 1. Valve seat; 2. Valve body; 21. Top cover; 22. Connecting seat; 3. Exhaust passage; 31. Through hole; 32. Exhaust groove; 4. Umbrella membrane; 5. Connecting hole; 6. Reset mechanism; 61. Movable rod; 62. Reset spring; 7. Mounting flange; 8. Stepped hole; 81. First diameter section; 82. Second diameter section; 9. Vent hole; 10. Exhaust chamber; 11. Exhaust hole; 12. Waterproof and breathable membrane; 13. Outer sealing ring; 14. Limiting block. Detailed Implementation

[0028] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] This embodiment provides an explosion-proof and breathable diaphragm 4 valve, such as... Figure 1-4 As shown, it includes: a valve seat 1 and a valve body 2; an exhaust channel 3 is provided on the valve seat 1, and a diaphragm 4 is provided on the valve body 2. The diaphragm 4 is umbrella-shaped with one end open, and the open end of the diaphragm 4 faces the exhaust channel 3. When the diaphragm 4 is in the initial state, the diaphragm 4 closes the exhaust channel 3; a connecting hole 5 is provided on the valve seat 1, and a reset mechanism 6 is provided on the valve body 2. The reset mechanism 6 is movably connected to the connecting hole 5 and abuts against the valve seat 1.

[0033] Specifically, when the pressure inside the battery pack is sufficient to deform the diaphragm 4, the gas inside the battery pack pushes the outer side of the diaphragm 4 upwards, opening the exhaust channel 3. The gas inside the battery pack can then be discharged to the outside through the exhaust channel 3. When the pressure inside the battery pack is insufficient to deform the diaphragm 4, the diaphragm 4 returns to its original shape and closes the exhaust channel 3. When the pressure inside the battery pack is too high, after the diaphragm 4 deforms, sufficient pressure is applied to the valve body 2 to drive the reset mechanism 6. The reset mechanism 6 deforms, the valve body 2 separates from the valve seat 1, and the gas can directly pass through the gap between the valve body 2 and the valve seat 1, achieving rapid pressure relief.

[0034] By providing a diaphragm 4 on the valve body 2, when the pressure inside the battery pack exceeds the deformation threshold of the diaphragm 4, the diaphragm 4 will deform and open the exhaust channel 3, allowing gas to be discharged to the outside through the exhaust channel 3; and when the pressure inside the battery pack is too high, the gas can push the valve body 2, causing the valve body 2 to separate from the valve seat 1, further improving the pressure relief capability.

[0035] In this embodiment, the diaphragm 4 is made of a soft material, such as silicone or rubber. In its initial state, one open end of the diaphragm 4 is pressed against the valve seat 1, sealing the exhaust passage 3 connected to the battery pack. In this embodiment, the diaphragm 4 is made of rubber, and its deformation pressure threshold is 4 kPa.

[0036] Optionally, the reset mechanism 6 includes: a movable rod 61 and a reset spring 62; one end of the movable rod 61 passes through the connecting hole 5 and is fixed to the valve body 2; the reset spring 62 is sleeved on the movable rod 61; one end of the reset spring 62 is fixed to the other end of the movable rod 61; and the other end of the reset spring 62 abuts against the valve seat 1.

[0037] Specifically, when the pressure inside the battery pack is too high, the air pressure pushes the valve body 2, causing the movable rod 61 to move within the connecting hole 5. The return spring 62 is compressed, and at this time, the valve body 2 separates from the valve seat 1, allowing gas to pass through the gap between the valve body 2 and the valve seat 1. When the pressure inside the battery pack is insufficient to push the valve body 2 to move, the return spring 62 returns to its original position and pushes the movable rod 61 to its original position. The movable rod 61 then pulls the valve body 2 to its original position, sealing the gap between the valve body 2 and the valve seat 1.

[0038] In this embodiment, the return spring 62 is a compression spring with a compression pressure threshold of 20 kPa. When the air pressure inside the battery pack is less than 4 kPa, both the diaphragm 4 and the return spring 62 remain stationary, and the battery pack is in a closed state. When the air pressure inside the battery pack is greater than 4 kPa but less than 20 kPa, the diaphragm 4 deforms and flips upward, opening the exhaust channel 3 between the diaphragm 4 and the valve seat 1, allowing the gas inside the battery pack to be discharged through the exhaust channel 3. When the air pressure inside the battery pack is greater than 20 kPa, the gas inside the battery pack pushes the diaphragm 4, causing the valve body 2 to move. The return spring 62 is compressed, separating the valve body 2 from the valve seat 1, allowing the gas to pass through the gap between the valve body 2 and the valve seat 1.

[0039] Optionally, the valve body 2 includes: a top cover 21 and a connecting seat 22; the top cover 21 is provided with a mounting flange 7, and the connecting seat 22 is provided with a groove corresponding to the mounting flange 7, the mounting flange 7 is fitted into the groove, the movable rod 61 is fixed to the connecting seat 22, and the diaphragm 4 is provided on the connecting seat 22 and located outside the movable rod 61.

[0040] Specifically, during assembly, the diaphragm 4 is first installed on the connecting seat 22, and then the mounting flange 7 of the top cover 21 is fitted into the groove of the connecting seat 22, thus completing the assembly of the valve body 2 and the diaphragm 4.

[0041] Optionally, the umbrella membrane 4 is provided with a stepped hole 8, which has a first aperture portion 81 and a second aperture portion 82. The first aperture portion 81 is fitted with the connecting seat 22, and the second aperture portion 82 is fitted with the movable rod 61. The movable rod 61 is provided with a limiting block 14 for limiting the position of the umbrella membrane 4.

[0042] Specifically, when installing the umbrella membrane 4, firstly, the first aperture portion 81 of the umbrella membrane 4 is fitted with the connecting seat 22, and then the movable rod 61 is inserted into the stepped hole 8 so that the second aperture portion 82 is in contact with the outer surface of the movable rod 61. The limiting block 14 can limit the end of the umbrella membrane 4 away from the connecting seat 22, thereby fixing the position of the umbrella membrane 4.

[0043] Optionally, a through hole 31 is provided on the valve seat 1, and an exhaust groove 32 is provided on the side wall of the valve seat 1. The through hole 31 and the exhaust groove 32 are connected to form an exhaust channel 3. The diaphragm 4 overlaps the valve seat 1. When the diaphragm 4 is in the initial state, the diaphragm 4 closes the through hole 31.

[0044] Specifically, when the valve body 2 is installed on the battery pack, the battery pack is connected to the valve seat 1 through the through hole 31. When the air pressure inside the battery pack is sufficient to push the diaphragm 4, the gas pushes the diaphragm 4 through the through hole 31, causing the diaphragm 4 to deform. One open end of the diaphragm 4 separates from the valve body 2, and the gas passes through the gap between the diaphragm 4 and the valve seat 1 and is discharged from the exhaust groove 32.

[0045] Optionally, an outer sealing ring 13 is provided on the valve seat 1 at the end opposite to the valve body 2.

[0046] Specifically, by setting the outer sealing ring 13, the airtightness of the connection between the valve body 2 and the battery pack can be improved.

[0047] Example 2

[0048] This embodiment provides an explosion-proof and breathable diaphragm 4 valve, such as... Figure 1-4 As shown, it includes: a valve seat 1 and a valve body 2; an exhaust channel 3 is provided on the valve seat 1, and a diaphragm 4 is provided on the valve body 2. The diaphragm 4 is umbrella-shaped with one end open, and the open end of the diaphragm 4 faces the exhaust channel 3. When the diaphragm 4 is in the initial state, the diaphragm 4 closes the exhaust channel 3; a connecting hole 5 is provided on the valve seat 1, and a reset mechanism 6 is provided on the valve body 2. The reset mechanism 6 is movably connected to the connecting hole 5 and abuts against the valve seat 1.

[0049] Specifically, when the pressure inside the battery pack is sufficient to deform the diaphragm 4, the gas inside the battery pack pushes the outer side of the diaphragm 4 upwards, opening the exhaust channel 3. The gas inside the battery pack can then be discharged to the outside through the exhaust channel 3. When the pressure inside the battery pack is insufficient to deform the diaphragm 4, the diaphragm 4 returns to its original shape and closes the exhaust channel 3. When the pressure inside the battery pack is too high, after the diaphragm 4 deforms, sufficient pressure is applied to the valve body 2 to drive the reset mechanism 6. The reset mechanism 6 deforms, the valve body 2 separates from the valve seat 1, and the gas can directly pass through the gap between the valve body 2 and the valve seat 1, achieving rapid pressure relief.

[0050] By providing a diaphragm 4 on the valve body 2, when the pressure inside the battery pack exceeds the deformation threshold of the diaphragm 4, the diaphragm 4 deforms and opens the exhaust channel 3, allowing gas to be discharged to the outside through the exhaust channel 3; and when the pressure inside the battery pack is too high, the gas can push the valve body 2, causing the valve body 2 to separate from the valve seat 1, further improving the pressure relief capability.

[0051] In this embodiment, the diaphragm 4 is made of a soft material, such as silicone or rubber. In its initial state, one open end of the diaphragm 4 is pressed against the valve seat 1, sealing the exhaust passage 3 connected to the battery pack. In this embodiment, the diaphragm 4 is made of rubber, and its deformation pressure threshold is 4 kPa.

[0052] Optionally, the reset mechanism 6 includes: a movable rod 61 and a reset spring 62; one end of the movable rod 61 passes through the connecting hole 5 and is fixed to the valve body 2; the reset spring 62 is sleeved on the movable rod 61; one end of the reset spring 62 is fixed to the other end of the movable rod 61; and the other end of the reset spring 62 abuts against the valve seat 1.

[0053] Specifically, when the pressure inside the battery pack is too high, the air pressure pushes the valve body 2, causing the movable rod 61 to move within the connecting hole 5. The return spring 62 is compressed, and at this time, the valve body 2 separates from the valve seat 1, allowing gas to pass through the gap between the valve body 2 and the valve seat 1. When the pressure inside the battery pack is insufficient to push the valve body 2 to move, the return spring 62 returns to its original position and pushes the movable rod 61 to its original position. The movable rod 61 then pulls the valve body 2 to its original position, sealing the gap between the valve body 2 and the valve seat 1.

[0054] In this embodiment, the return spring 62 is a compression spring with a compression pressure threshold of 20 kPa. When the air pressure inside the battery pack is less than 4 kPa, both the diaphragm 4 and the return spring 62 remain stationary, and the battery pack is in a closed state. When the air pressure inside the battery pack is greater than 4 kPa but less than 20 kPa, the diaphragm 4 deforms and flips upward, opening the exhaust channel 3 between the diaphragm 4 and the valve seat 1, allowing the gas inside the battery pack to be discharged through the exhaust channel 3. When the air pressure inside the battery pack is greater than 20 kPa, the gas inside the battery pack pushes the diaphragm 4, causing the valve body 2 to move. The return spring 62 is compressed, separating the valve body 2 from the valve seat 1, allowing the gas to pass through the gap between the valve body 2 and the valve seat 1.

[0055] Optionally, the valve body 2 includes: a top cover 21 and a connecting seat 22; the top cover 21 is provided with a mounting flange 7, and the connecting seat 22 is provided with a groove corresponding to the mounting flange 7, the mounting flange 7 is fitted into the groove, the movable rod 61 is fixed to the connecting seat 22, and the diaphragm 4 is provided on the connecting seat 22 and located outside the movable rod 61.

[0056] Specifically, during assembly, the diaphragm 4 is first installed on the connecting seat 22, and then the mounting flange 7 of the top cover 21 is fitted into the groove of the connecting seat 22, thus completing the assembly of the valve body 2 and the diaphragm 4.

[0057] Optionally, the umbrella membrane 4 is provided with a stepped hole 8, which has a first aperture portion 81 and a second aperture portion 82. The first aperture portion 81 is fitted with the connecting seat 22, and the second aperture portion 82 is fitted with the movable rod 61. The movable rod 61 is provided with a limiting block 14 for limiting the position of the umbrella membrane 4.

[0058] Specifically, when installing the umbrella membrane 4, firstly, the first aperture portion 81 of the umbrella membrane 4 is fitted with the connecting seat 22, and then the movable rod 61 is inserted into the stepped hole 8 so that the second aperture portion 82 is in contact with the outer surface of the movable rod 61. The limiting block 14 can limit the end of the umbrella membrane 4 away from the connecting seat 22, thereby fixing the position of the umbrella membrane 4.

[0059] Optionally, the movable rod 61 is provided with a vent hole 9, the top cover 21 and the connecting seat 22 are in corresponding contact to form an exhaust chamber 10, the vent hole 9 is connected to the exhaust chamber 10, and at least one exhaust hole 11 is provided on the side of the top cover 21, and all exhaust holes 11 are connected to the exhaust chamber 10.

[0060] Specifically, when the air pressure inside the battery pack is too low to push the diaphragm 4, the gas inside the battery pack can enter the exhaust chamber 10 through the vent 9 and be discharged from the exhaust port 11, which can prevent the accumulation of excessive gas during normal operation of the battery pack.

[0061] Optionally, a waterproof and breathable membrane 12 is provided inside the exhaust chamber 10 and at the connecting hole 5.

[0062] Specifically, by providing a waterproof and breathable membrane 12, the connecting hole 5 can be covered, preventing external moisture from entering the battery pack through the connecting hole 5. The waterproof and breathable membrane 12 is pressed into the groove by the mounting flange 7.

[0063] Optionally, a through hole 31 is provided on the valve seat 1, and an exhaust groove 32 is provided on the side wall of the valve seat 1. The through hole 31 and the exhaust groove 32 are connected to form an exhaust channel 3. The diaphragm 4 overlaps the valve seat 1. When the diaphragm 4 is in the initial state, the diaphragm 4 closes the through hole 31.

[0064] Specifically, when the valve body 2 is installed on the battery pack, the battery pack is connected to the valve seat 1 through the through hole 31. When the air pressure inside the battery pack is sufficient to push the diaphragm 4, the gas pushes the diaphragm 4 through the through hole 31, causing the diaphragm 4 to deform. One open end of the diaphragm 4 separates from the valve body 2, and the gas passes through the gap between the diaphragm 4 and the valve seat 1 and is discharged from the exhaust groove 32.

[0065] Optionally, an outer sealing ring 13 is provided on the valve seat 1 at the end opposite to the valve body 2.

[0066] Specifically, by setting the outer sealing ring 13, the airtightness of the connection between the valve body 2 and the battery pack can be improved.

[0067] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A diaphragm explosion-proof and breathable valve, characterized in that, It includes: a valve seat and a valve body; an exhaust passage is provided on the valve seat, and a diaphragm is provided on the valve body. The diaphragm is umbrella-shaped with one end open, and the open end of the diaphragm faces the exhaust passage. When the diaphragm is in its initial state, the diaphragm closes the exhaust passage; a connecting hole is provided on the valve seat, and a reset mechanism is provided on the valve body. The reset mechanism is movably connected to the connecting hole and abuts against the valve seat.

2. A burst vent valve for an umbrella canopy according to claim 1, wherein, The reset mechanism includes a movable rod and a reset spring; one end of the movable rod passes through the connecting hole and is fixed to the valve body, the reset spring is sleeved on the movable rod, one end of the reset spring is fixed to the other end of the movable rod, and the other end of the reset spring abuts against the valve seat.

3. A burst vent valve for an umbrella canopy according to claim 2, wherein, The valve body includes: a top cover and a connecting seat; the top cover is provided with a mounting flange, and the connecting seat is provided with a groove corresponding to the mounting flange, the mounting flange is fitted into the groove, the movable rod is fixed to the connecting seat, and the diaphragm is provided on the connecting seat and located outside the movable rod.

4. A burst vent valve for an umbrella canopy according to claim 3, wherein, The umbrella membrane has stepped holes, each having a first diameter portion and a second diameter portion. The first diameter portion engages with the connecting seat, and the second diameter portion engages with the movable rod. The movable rod is provided with a limiting block for restricting the position of the umbrella membrane.

5. The umbrella-shaped explosion-proof and breathable valve according to claim 3, characterized in that, The movable rod has a vent hole, the top cover and the connecting seat are in contact to form an exhaust chamber, the vent hole is connected to the exhaust chamber, and at least one exhaust hole is opened on the side of the top cover, and all exhaust holes are connected to the exhaust chamber.

6. A burst vent valve for an umbrella canopy according to claim 5, wherein, A waterproof and breathable membrane is provided inside the exhaust chamber and at the connecting hole.

7. The umbrella-shaped explosion-proof and breathable valve according to claim 1, characterized in that, The valve seat has a through hole and an exhaust groove on its side wall. The through hole and the exhaust groove are connected to form the exhaust channel. The diaphragm is attached to the valve seat. When the diaphragm is in its initial state, the diaphragm closes the through hole.

8. The burst vent valve of claim 1, wherein the valve is a valve that is capable of being integrated into a film of an umbrella. An outer sealing ring is provided on the valve seat at the end opposite to the valve body.

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