A canopy pressure relief valve that is easy to assemble

Abstract

This utility model relates to an easy-to-assemble diaphragm pressure relief valve. The key technical features are: it includes a valve body and a valve cover; the valve cover is disposed on the valve body, the valve body has an exhaust channel, a mounting base is disposed on the valve cover, and a diaphragm is disposed on the mounting base. The diaphragm is umbrella-shaped with one open end, the open end of the diaphragm facing the valve body, and overlapping the open end of the diaphragm with the valve body. In its initial state, the diaphragm closes the exhaust channel. This application replaces the original spring structure with a diaphragm, resulting in a simpler installation and lower cost compared to the original spring structure pressure relief valve.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, and more specifically, to a diaphragm pressure relief valve that is easy to assemble. 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, a pressure relief valve is required for active pressure relief. Based on the structural characteristics and safety requirements of the battery pack, the pressure relief valve needs to meet requirements for sealing, appropriate opening pressure, and a sufficiently large pressure relief cross-section. After the pressure relief of a single cell is completed, the valve closes to prevent external oxygen from entering.

[0003] Currently, battery packs typically use either spring-loaded pressure relief valves or pin-type burst-type venting pressure relief valves. Pin-type burst-type venting pressure relief valves have a higher burst pressure and poor consistency in burst pressure. When the vent membrane inside the pin-type burst-type venting pressure relief valve ruptures, the inside and outside of the battery pack become interconnected. A large amount of oxygen from the outside enters the battery pack and participates in the reaction, which can cause the battery pack to burn again. Therefore, spring-loaded pressure relief valves are more commonly used. Spring-loaded pressure relief valves require the air pressure inside the battery pack to be greater than the spring force before the pressure relief valve can be activated.

[0004] The two pressure relief valves described above have relatively complex structures and require numerous components, making their production and assembly processes cumbersome, consuming significant manpower and resources, and resulting in high costs. Therefore, designing a low-cost battery pressure relief valve with a simple structure and easy assembly has become a pressing technical problem for those skilled in the art. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an easy-to-assemble diaphragm pressure relief valve. By using a diaphragm to replace the original spring structure, the pressure relief valve is simpler to install and has a lower cost compared to the original spring structure.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a diaphragm pressure relief valve that is easy to assemble, comprising: a valve body and a valve cover; the valve cover is disposed on the valve body, the valve body is provided with an exhaust channel, a mounting seat is disposed on the valve cover, and a diaphragm is disposed on the mounting seat. The diaphragm is umbrella-shaped with one end open, the open end of the diaphragm faces the valve body, and the open end of the diaphragm overlaps with the valve body. When the diaphragm is in its initial state, the diaphragm closes the exhaust channel.

[0007] Specifically, when assembling the pressure relief valve, simply install the diaphragm onto the valve cover first, and then install the valve cover onto the valve body. At this point, one open end of the diaphragm presses against the valve body, thus sealing the exhaust passage. By using a diaphragm instead of the original spring structure, the pressure relief valve is simpler to install and less expensive than the original spring structure.

[0008] The diaphragm is made of a soft material, such as silicone or rubber. In its initial state, the open end of the diaphragm is pressed against the valve body, sealing the venting channel connecting to the battery pack. When the air pressure inside the battery pack is high, the gas in the venting channel pushes the diaphragm towards one side of the battery pack, causing it to deform. The open end of the diaphragm separates from the valve body, opening the venting channel and allowing gas to escape from the battery pack. As the pressure inside the battery pack decreases, when the pressure is insufficient to deform the diaphragm, it returns to its initial state, sealing the venting channel again and isolating the battery pack from the outside environment.

[0009] Optionally, the valve body has a through hole and the side wall of the valve body has an exhaust groove. The through hole and the exhaust groove are connected to form the exhaust channel. The diaphragm is attached to the valve body. When the diaphragm is in its initial state, the diaphragm closes the through hole.

[0010] Specifically, when the valve body is installed on the battery pack, the battery pack is connected to the valve body through a through hole. When the gas pressure inside the battery pack is high, the gas pushes the diaphragm through the through hole, causing the diaphragm to deform. One end of the diaphragm with an opening separates from the valve body, and the gas passes through the gap between the diaphragm and the valve body and is discharged from the exhaust groove.

[0011] Optionally, a closing flange is provided on the diaphragm at a section opposite to the valve cover, the closing flange abutting against the valve body.

[0012] Specifically, by setting a closed flange, the contact area between the diaphragm and the valve body can be increased, further improving the sealing effect of the diaphragm on the through hole.

[0013] Optionally, the valve cover includes: a top cover and a connecting seat; the top cover is disposed on the valve body, and a mounting flange is provided on the top cover; a groove corresponding to the mounting flange is provided at one end of the connecting seat, the mounting flange is fitted into the groove, and the mounting seat is disposed on the connecting seat.

[0014] Specifically, during assembly, the diaphragm is first installed on the mounting base, and then the mounting flange of the top cover is fitted into the groove of the connecting base to complete the assembly of the valve cover and the diaphragm.

[0015] Optionally, the umbrella membrane has a connecting hole, the top cover and the connecting seat are in corresponding contact to form an exhaust chamber, the connecting 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.

[0016] Specifically, a small amount of gas will be generated inside the battery pack during normal operation. Since the small amount of gas is difficult to push open the umbrella valve, in order to avoid the accumulation of excessive gas during normal operation of the battery pack, a connecting hole and an exhaust hole are provided. At this time, the small amount of gas can be directly discharged to the outside through the connecting hole and the exhaust hole.

[0017] Optionally, a waterproof and breathable membrane is provided inside the exhaust chamber and at the connecting hole.

[0018] 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.

[0019] Optionally, an outer sealing ring is provided on the valve body at the end opposite to the valve cover.

[0020] Specifically, by setting an external sealing ring, the airtightness of the connection between the valve body and the battery pack can be improved.

[0021] Optionally, an external thread is provided on the valve body at one end opposite to the valve cover, the external thread being used for threaded connection with the battery pack.

[0022] Specifically, fixing the valve body to the battery pack using external threads can improve the connection stability between the valve body and the battery pack.

[0023] In summary, this utility model has the following beneficial effects:

[0024] When assembling the pressure relief valve, simply install the diaphragm onto the valve cover first, then install the valve cover onto the valve body. At this point, the lower outer edge of the diaphragm presses firmly against the valve body, sealing the exhaust passage. By using a diaphragm instead of the original spring structure, the pressure relief valve is simpler to install and less expensive than the original spring structure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional structural schematic diagram of Embodiment 1 of this utility model;

[0027] Figure 3 This is an exploded structural diagram of Embodiment 1 of this utility model;

[0028] Figure 4This is a cross-sectional structural schematic diagram of Embodiment 2 of this utility model;

[0029] Figure 5 This is an exploded structural diagram of Embodiment 2 of this utility model.

[0030] In the diagram: 1. Valve body; 2. Valve cover; 21. Top cover; 22. Connecting seat; 3. Exhaust passage; 31. Through hole; 32. Exhaust groove; 4. Mounting seat; 5. Umbrella membrane; 6. Sealing flange; 7. Mounting flange; 8. Groove; 9. Connecting hole; 10. Exhaust chamber; 11. Exhaust hole; 12. Waterproof and breathable membrane; 13. Outer sealing ring; 14. External thread. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Example 1

[0035] This embodiment provides a pressure relief valve with an umbrella-shaped diaphragm 5 that is easy to assemble, such as... Figure 1-3 As shown, it includes: valve body 1 and valve cover 2; valve cover 2 is disposed on valve body 1, valve body 1 is provided with exhaust channel 3, valve cover 2 is provided with mounting base 4, mounting base 4 is provided with umbrella 5, umbrella 5 is umbrella-shaped with one end open, the open end of umbrella 5 faces the valve body, umbrella 5 overlaps with valve body 1, when umbrella 5 is in the initial state, umbrella 5 closes exhaust channel 3.

[0036] Specifically, when assembling the pressure relief valve, simply install the diaphragm 5 onto the valve cover 2 first, and then install the valve cover 2 onto the valve body 1. At this time, the lower outer periphery of the diaphragm 5 presses tightly against the valve body 1, thus sealing the exhaust passage 3. By using the diaphragm 5 to replace the original spring structure, the pressure relief valve is simpler to install and has a lower cost compared to the original spring structure.

[0037] The diaphragm 5 is made of a soft material, such as silicone or rubber. In its initial state, the lower outer edge of the diaphragm 5 presses against the valve body 1, sealing the exhaust channel 3 connected to the battery pack. When the air pressure inside the battery pack is high, the gas in the exhaust channel 3 pushes the diaphragm 5 towards one side of the battery pack, causing the diaphragm 5 to deform. The lower outer edge of the diaphragm 5 separates from the valve body 1, at which point the exhaust channel 3 opens, and gas can be discharged from the battery pack through the exhaust channel 3. As the pressure inside the battery pack decreases, when the pressure inside the battery pack is insufficient to deform the diaphragm 5, the diaphragm 5 returns to its initial state and seals the exhaust channel 3 again, isolating the inside of the battery pack from the outside.

[0038] Optionally, a through hole 31 is provided on the valve body 1, and an exhaust groove 32 is provided on the side wall of the valve body 1. The through hole 31 and the exhaust groove 32 are connected to form an exhaust channel 3. The diaphragm 5 is attached to the valve body 1. When the diaphragm 5 is in the initial state, the diaphragm 5 closes the through hole 31.

[0039] Specifically, when the valve body 1 is installed on the battery pack, the battery pack is connected to the valve body 1 through the through hole 31. When the air pressure inside the battery pack is high, the gas pushes the diaphragm 5 through the through hole 31, causing the diaphragm 5 to deform. The lower periphery of the diaphragm 5 separates from the valve body 1, and the gas passes through the gap between the diaphragm 5 and the valve body 1 and is discharged from the exhaust groove 32.

[0040] Optionally, a sealing flange 6 is provided on the diaphragm 5 and located at a section opposite to the valve cover 2, and the sealing flange 6 abuts against the valve body 1.

[0041] Specifically, by setting the closed flange 6, the contact area between the diaphragm 5 and the valve body 1 can be increased, thereby further improving the sealing effect of the diaphragm 5 on the through hole 31.

[0042] Optionally, an outer sealing ring 13 is provided on the valve body 1 at the end opposite to the valve cover 2.

[0043] Specifically, by setting the outer sealing ring 13, the airtightness of the connection between the valve body 1 and the battery pack can be improved.

[0044] Optionally, an external thread 14 is provided on the valve body 1 at the end opposite to the valve cover 2, the external thread 14 being used for threaded connection with the battery pack.

[0045] Specifically, fixing the valve body 1 to the battery pack via the external thread 14 can improve the connection stability between the valve body 1 and the battery pack.

[0046] Example 2

[0047] This embodiment provides a pressure relief valve with an umbrella-shaped diaphragm 5 that is easy to assemble, such as... Figure 1 , Figure 4 and Figure 5 As shown, it includes: valve body 1 and valve cover 2; valve cover 2 is disposed on valve body 1, valve body 1 is provided with exhaust channel 3, valve cover 2 is provided with mounting seat 4, mounting seat 4 is provided with diaphragm 5, diaphragm 5 overlaps with valve body 1, and when diaphragm 5 is in the initial state, diaphragm 5 closes exhaust channel 3.

[0048] Specifically, when assembling the pressure relief valve, simply install the diaphragm 5 onto the valve cover 2 first, and then install the valve cover 2 onto the valve body 1. At this time, the lower outer periphery of the diaphragm 5 presses tightly against the valve body 1, thus sealing the exhaust passage 3. By using the diaphragm 5 to replace the original spring structure, the pressure relief valve is simpler to install and has a lower cost compared to the original spring structure.

[0049] The diaphragm 5 is made of a soft material, such as silicone or rubber. In its initial state, the lower outer edge of the diaphragm 5 presses against the valve body 1, sealing the exhaust channel 3 connected to the battery pack. When the air pressure inside the battery pack is high, the gas in the exhaust channel 3 pushes the diaphragm 5 towards one side of the battery pack, causing the diaphragm 5 to deform. The lower outer edge of the diaphragm 5 separates from the valve body 1, at which point the exhaust channel 3 opens, and gas can be discharged from the battery pack through the exhaust channel 3. As the pressure inside the battery pack decreases, when the pressure inside the battery pack is insufficient to deform the diaphragm 5, the diaphragm 5 returns to its initial state and seals the exhaust channel 3 again, isolating the inside of the battery pack from the outside.

[0050] Optionally, a through hole 31 is provided on the valve body 1, and an exhaust groove 32 is provided on the side wall of the valve body 1. The through hole 31 and the exhaust groove 32 are connected to form an exhaust channel 3. The diaphragm 5 is attached to the valve body 1. When the diaphragm 5 is in the initial state, the diaphragm 5 closes the through hole 31.

[0051] Specifically, when the valve body 1 is installed on the battery pack, the battery pack is connected to the valve body 1 through the through hole 31. When the air pressure inside the battery pack is high, the gas pushes the diaphragm 5 through the through hole 31, causing the diaphragm 5 to deform. The lower periphery of the diaphragm 5 separates from the valve body 1, and the gas passes through the gap between the diaphragm 5 and the valve body 1 and is discharged from the exhaust groove 32.

[0052] Optionally, a sealing flange 6 is provided on the diaphragm 5 and located at a section opposite to the valve cover 2, and the sealing flange 6 abuts against the valve body 1.

[0053] Specifically, by setting the closed flange 6, the contact area between the diaphragm 5 and the valve body 1 can be increased, thereby further improving the sealing effect of the diaphragm 5 on the through hole 31.

[0054] Optionally, the valve cover 2 includes: a top cover 21 and a connecting seat 22; the top cover 21 is disposed on the valve body 1, and a mounting flange 7 is provided on the top cover 21; a groove 8 corresponding to the mounting flange 7 is provided at one end of the connecting seat 22, the mounting flange 7 is fitted into the groove 8, and the mounting seat 4 is disposed on the connecting seat 22.

[0055] Specifically, during assembly, the diaphragm 5 is first installed on the mounting base 4, and then the mounting flange 7 of the top cover 21 is fitted into the groove 8 of the connecting base 22, thus completing the assembly of the valve cover 2 and the diaphragm 5.

[0056] Optionally, the umbrella membrane 5 has a connecting hole 9, the top cover 21 and the connecting seat 22 are in corresponding contact to form an exhaust chamber 10, the connecting 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.

[0057] Specifically, a small amount of gas will be generated inside the battery pack when it is working normally. Since the small amount of gas is difficult to push open the umbrella valve, in order to avoid the accumulation of excessive gas during normal operation of the battery pack, a connecting hole 9 and an exhaust hole 11 are provided. At this time, the small amount of gas can be directly discharged to the outside through the connecting hole 9 and the exhaust hole 11.

[0058] Optionally, a waterproof and breathable membrane 12 is provided inside the exhaust chamber 10 and at the connecting hole 9.

[0059] Specifically, by providing a waterproof and breathable membrane 12, the connecting hole 9 can be covered, preventing external moisture from entering the battery pack through the connecting hole 9. The waterproof and breathable membrane 12 is pressed tightly within the groove 8 by the mounting flange 7.

[0060] Optionally, an outer sealing ring 13 is provided on the valve body 1 at the end opposite to the valve cover 2.

[0061] Specifically, by setting the outer sealing ring 13, the airtightness of the connection between the valve body 1 and the battery pack can be improved.

[0062] Optionally, an external thread 14 is provided on the valve body 1 at the end opposite to the valve cover 2, the external thread 14 being used for threaded connection with the battery pack.

[0063] Specifically, fixing the valve body 1 to the battery pack via the external thread 14 can improve the connection stability between the valve body 1 and the battery pack.

[0064] 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 vent valve for an umbrella canopy that is easy to assemble, characterized in that, include: A valve body and a valve cover; the valve cover is disposed on the valve body, the valve body is provided with an exhaust passage, a mounting base is disposed on the valve cover, and a diaphragm is disposed on the mounting base. The diaphragm is umbrella-shaped with one end open, the open end of the diaphragm is directly opposite the valve body, and the open end of the diaphragm overlaps with the valve body. When the diaphragm is in its initial state, the diaphragm closes the exhaust passage.

2. The diaphragm pressure relief valve for easy assembly according to claim 1, characterized in that, The valve body 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 body. When the diaphragm is in its initial state, the diaphragm closes the through hole.

3. The pressure relief valve of claim 1, wherein, A sealing flange is provided on the diaphragm and at a section opposite to the valve cover, and the sealing flange abuts against the valve body.

4. An umbrella membrane pressure relief valve for easy assembly according to any one of claims 1-3, characterized in that The valve cover includes a top cover and a connecting seat; the top cover is disposed on the valve body and has a mounting flange; a groove corresponding to the mounting flange is provided at one end of the connecting seat, the mounting flange is fitted into the groove, and the mounting seat is disposed on the connecting seat.

5. A pressure relief valve for an umbrella canopy according to claim 4, wherein The umbrella membrane has a connecting hole, the top cover and the connecting seat are in corresponding contact to form an exhaust chamber, the connecting 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 pressure relief 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 pressure relief valve of claim 1, wherein, An outer sealing ring is provided on the valve body at the end opposite to the valve cover.

8. The pressure relief valve of claim 1, wherein, An external thread is provided on the valve body at one end opposite to the valve cover, the external thread being used for threaded connection with the battery pack.

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