Active anti-explosion valve

Abstract

According to the technical scheme, the active anti-explosion valve is characterized by comprising a valve seat, a valve cover, a connecting seat and a movable assembly; the valve cover is arranged on the connecting seat, the movable assembly is arranged on the valve seat, the movable assembly and the connecting seat are fixed, an exhaust gap is formed between the connecting seat and the valve seat, a mounting plate is arranged on the valve seat, a power assembly is arranged on the mounting plate, and the valve cover is arranged on the power assembly. The power assembly is used for opening the exhaust gap; when thermal runaway occurs in the battery pack, the power assembly is started to push the connecting base to move, and rapid opening of the exhaust gap is achieved.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof valve technology, and more specifically, to an active explosion-proof valve. Background Technology

[0002] Explosion-proof valves are important types of valves widely used in equipment requiring waterproofing and pressure relief in industries such as petrochemicals, metallurgy, power, gas, and automobiles. They are typically installed on the equipment's outer casing. The core function of an explosion-proof valve is to prevent the intrusion of liquids and contaminants while allowing gas molecules to pass through to balance the pressure. It can rapidly release pressure when the internal pressure of the equipment or system exceeds a safe threshold, preventing an explosion.

[0003] Taking batteries as an example, during use, internal chemical reactions may produce gas, which can cause the internal pressure of the battery pack to rise sharply. When the internal pressure exceeds the preset safety value, the explosion-proof valve installed on the battery pack will open quickly to release the internal pressure and prevent an explosion, thus protecting the safety of the battery pack, the car, and the people.

[0004] Most existing explosion-proof valves use spring-controlled switches. When the internal air pressure exceeds the spring's yield strength, the spring compresses, opening the valve to release air and pressure. These valves typically have metal bodies, with the spring usually positioned in the middle. A support structure connecting the spring and the opening / closing mechanism needs to be machined in the middle of the valve body. For example, the explosion-proof valve disclosed in patent CN216590228U can only be opened by the air pressure inside the battery pack when the pressure exceeds a preset safety value. This opening method has a long response time and cannot cope with the rapid pressure surge during thermal runaway, thus requiring further improvement. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an active explosion-proof valve to solve the above-mentioned technical problems.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an active explosion-proof valve, comprising: a valve seat, a valve cover, a connecting seat, and a movable component; the valve cover is disposed on the connecting seat, the movable component is disposed on the valve seat, the movable component is fixed to the connecting seat, an exhaust gap is formed between the connecting seat and the valve seat, an mounting plate is disposed on the valve seat, and a power component is disposed on the mounting plate, the power component being used to open the exhaust gap.

[0007] Specifically, when the internal pressure of the battery pack exceeds the elastic force of the moving components, the air pressure in the battery pack pushes the connecting seat to move, at which point the venting gap opens, allowing the gas inside the battery pack to escape to the outside. In the event of thermal runaway within the battery pack, the power unit activates, pushing the connecting seat to move and rapidly opening the venting gap. The power unit can be an electric cylinder, pneumatic cylinder, or other power source capable of pushing the moving components in a linear motion.

[0008] Optionally, the movable component includes: a connecting rod and an elastic element; the valve seat is provided with a connecting hole adapted to the connecting rod; one end of the connecting rod passes through the connecting hole and is fixed to the connecting seat; one end of the elastic element is fixed to the valve seat, and the other end is fixed to the connecting rod; the power component is used to push the connecting rod to open the exhaust gap.

[0009] Specifically, when the internal pressure of the battery pack exceeds the elastic force of the moving components, the air pressure in the battery pack pushes the connecting seat to move, opening the venting gap. The connecting rod moves with the connecting seat, compressing the elastic element. After the pressure inside the battery pack is released, the elastic element returns to its original shape, the connecting rod drives the connecting seat to reset, and the venting gap closes. In the event of thermal runaway within the battery pack, the power unit activates, pushing the connecting rod to move, thereby rapidly opening the venting gap.

[0010] Optionally, the valve seat is provided with a mounting groove, and an inner sealing ring is provided in the mounting groove; when the movable component is in the initial state, the inner sealing ring abuts against the connecting seat to seal the exhaust gap.

[0011] Specifically, when the explosion-proof valve is in its initial state, the internal sealing ring can seal the exhaust gap between the connecting seat and the valve seat, preventing external moisture from entering the battery pack through the exhaust gap.

[0012] Optionally, the movable component includes: a connecting rod, an elastic element, and a connecting sleeve; the valve seat is provided with a connecting hole adapted to the connecting sleeve, the connecting sleeve is slidably connected to the connecting hole, the connecting rod is slidably connected to the inner wall of the connecting sleeve, and one end of the connecting rod extends out of the connecting sleeve and is fixed to the connecting seat; one end of the elastic element is fixed to the inner wall of the connecting sleeve, and the other end is fixed to the connecting rod; the connecting sleeve is fixed to the output end of the power component.

[0013] Specifically, when the internal pressure of the battery pack exceeds the elastic force of the moving components, the air pressure in the battery pack pushes the connector to move, opening the venting gap. The connecting rod moves with the connector, compressing the elastic element. After the pressure inside the battery pack is released, the elastic element returns to its original shape, the connecting rod drives the connector to reset, and the venting gap closes. In the event of thermal runaway within the battery pack, the power unit activates, pushing the connecting sleeve to move and increasing the opening height of the connector.

[0014] Optionally, the connecting seat is frustum-shaped, the connecting rod is located at the end of the connecting seat with a smaller diameter, and the valve seat is provided with an inner sealing ring, which contacts the side wall of the connecting seat to seal the exhaust gap.

[0015] Specifically, the frustum-shaped connector allows the connector to easily enter and exit from the inner ring of the inner sealing ring. When the explosion-proof valve is in its initial state, the inner sealing ring and the side wall of the connector are in corresponding contact, which can improve the sealing effect of the connector and the valve seat and prevent external moisture from entering the battery pack through the exhaust gap.

[0016] Optionally, the valve cover is provided with a vent hole, and the connecting rod is provided with a through hole, the vent hole and the through hole being in communication.

[0017] Specifically, the battery pack generates a small amount of gas during operation. To prevent the gas from accumulating inside the battery pack, through holes and vents are provided so that the gas can be directly discharged to the outside through these holes and vents.

[0018] Optionally, a waterproof and breathable membrane covering the through hole is provided inside the valve cover.

[0019] Specifically, by setting up a waterproof and breathable membrane, it can cover the openings and prevent external moisture from entering the battery pack through the openings.

[0020] Optionally, a plurality of vent holes are provided in the valve seat, and the plurality of vent holes are arranged at radial intervals along the valve seat.

[0021] Specifically, by setting multiple vents, when the gas pressure inside the battery pack exceeds a threshold, the gas pushes the connector through the vents. At this time, the movable component moves upward with the connector, and the inner sealing ring opens the vent gap between the connector and the valve seat, allowing the gas to be discharged to the outside. When the gas pressure inside the battery pack falls below the threshold, the movable component drives the connector to reset, and the inner sealing ring closes the vent gap between the connector and the valve seat.

[0022] In summary, this invention has the following beneficial effects: When the internal pressure of the battery pack exceeds the elastic force of the moving component, the air pressure in the battery pack pushes the connecting seat to move, at which point the exhaust gap opens, allowing the gas inside the battery pack to be discharged to the outside. In the event of thermal runaway within the battery pack, the power component activates to push the connecting seat to move, achieving rapid opening of the exhaust gap. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0024] Figure 2This is a cross-sectional structural schematic diagram of Embodiment 1 of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of Embodiment 2 of this utility model.

[0027] In the diagram: 1. Valve seat; 2. Valve cover; 3. Connecting seat; 4. Moving component; 41. Connecting rod; 42. Elastic element; 43. Connecting sleeve; 5. Mounting plate; 6. Power component; 7. Mounting groove; 8. Inner sealing ring; 9. Connecting hole; 10. Vent hole; 11. Through hole; 12. Waterproof and breathable membrane; 13. Exhaust hole. 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 active explosion-proof valve, such as Figure 1 and Figure 2 As shown, it includes: valve seat 1, valve cover 2, connecting seat 3 and movable component 4; valve cover 2 is disposed on connecting seat 3, movable component 4 is disposed on valve seat 1, movable component 4 is fixed to connecting seat 3, connecting seat 3 and valve seat 1 form an exhaust gap, mounting plate 5 is disposed on valve seat 1, and power component 6 is disposed on mounting plate 5, power component 6 is used to open exhaust gap.

[0033] Specifically, when the internal pressure of the battery pack exceeds the elastic force of the movable component 4, the air pressure in the battery pack pushes the connecting seat 3 to move. At this time, the exhaust gap opens, allowing the gas inside the battery pack to be discharged to the outside. In the event of thermal runaway within the battery pack, the power component 6 is activated to push the connecting seat 3 to move, achieving rapid opening of the exhaust gap. The power component 6 can be a power source capable of pushing the movable component 4 linearly, such as an electric cylinder or a pneumatic cylinder. In this embodiment, an electric cylinder is selected as the power component 6.

[0034] Optionally, the movable component 4 includes: a connecting rod 41 and an elastic element 42; the valve seat 1 is provided with a connecting hole 9 that is adapted to the connecting rod 41; one end of the connecting rod 41 passes through the connecting hole 9 and is fixed to the connecting seat 3; one end of the elastic element 42 is fixed to the valve seat 1, and the other end is fixed to the connecting rod 41; the power component 6 is used to push the connecting rod 41 to open the exhaust gap.

[0035] Specifically, when the internal pressure of the battery pack exceeds the elastic force of the moving component 4, the air pressure in the battery pack pushes the connecting seat 3 to move, opening the venting gap. The connecting rod 41 moves with the connecting seat 3, and the elastic element 42 is compressed. After the pressure relief within the battery pack is complete, the elastic element 42 returns to its original shape, and the connecting rod 41 drives the connecting seat 3 to reset, closing the venting gap. In the event of thermal runaway within the battery pack, the power component 6 is activated to push the connecting rod 41 to move, thereby rapidly opening the venting gap by pushing the connecting seat 3. In this embodiment, the elastic element is a spring.

[0036] Optionally, the valve seat 1 is provided with a mounting groove 7, and an inner sealing ring 8 is provided in the mounting groove 7; when the movable component 4 is in the initial state, the inner sealing ring 8 abuts against the connecting seat 3 to seal the exhaust gap.

[0037] Specifically, when the explosion-proof valve is in its initial state, the inner sealing ring 8 can seal the exhaust gap between the connecting seat 3 and the valve seat 1, preventing external moisture from entering the battery pack through the exhaust gap.

[0038] Optionally, the valve cover 2 is provided with a vent hole 10, and the connecting rod is provided with a through hole 11, with the vent hole 10 communicating with the through hole 11.

[0039] Specifically, the battery pack generates a small amount of gas during operation. To prevent the gas from accumulating inside the battery pack, through holes 11 and vent holes 10 are provided so that the gas can be directly discharged to the outside through the through holes 11 and vent holes 10.

[0040] Optionally, a waterproof and breathable membrane 12 covering the through hole 11 is provided inside the valve cover 2.

[0041] Specifically, by setting up a waterproof and breathable membrane 12, it can cover the through hole 11, preventing external moisture from entering the battery pack through the through hole 11.

[0042] Optionally, a plurality of vent holes 13 are provided in the valve seat 1, and the plurality of vent holes 13 are arranged at radial intervals along the valve seat 1.

[0043] Specifically, by setting multiple vent holes 13, when the gas pressure inside the battery pack exceeds a threshold, the gas pushes the connecting seat 3 through the vent holes 13. At this time, the movable component 4 moves upward with the connecting seat 3, and the inner sealing ring 8 opens the vent gap between the connecting seat 3 and the valve seat 1, allowing the gas to be discharged to the outside through the vent gap. When the gas pressure inside the battery pack falls below the threshold, the movable component 4 drives the connecting seat 3 to reset, and the inner sealing ring 8 closes the vent gap between the connecting seat 3 and the valve seat 1.

[0044] Example 2

[0045] This embodiment provides an active explosion-proof valve, such as Figure 3 and Figure 4 As shown, it includes: valve seat 1, valve cover 2, connecting seat 3 and movable component 4; valve cover 2 is disposed on connecting seat 3, movable component 4 is disposed on valve seat 1, movable component 4 is fixed to connecting seat 3, connecting seat 3 and valve seat 1 form an exhaust gap, mounting plate 5 is disposed on valve seat 1, and power component 6 is disposed on mounting plate 5, power component 6 is used to open exhaust gap.

[0046] Specifically, when the internal pressure of the battery pack exceeds the elastic force of the movable component 4, the air pressure in the battery pack pushes the connecting seat 3 to move. At this time, the exhaust gap opens, allowing the gas inside the battery pack to be discharged to the outside. In the event of thermal runaway within the battery pack, the power component 6 is activated to push the connecting seat 3 to move, achieving rapid opening of the exhaust gap. The power component 6 can be a power source capable of pushing the movable component 4 linearly, such as an electric cylinder or a pneumatic cylinder. In this embodiment, an electric cylinder is selected as the power component 6.

[0047] Optionally, the movable component 4 includes: a connecting rod 41, an elastic element 42, and a connecting sleeve 43; the valve seat 1 is provided with a connecting hole 9 that is adapted to the connecting sleeve 43, the connecting sleeve 43 is slidably connected to the connecting hole 9, the connecting rod 41 is slidably connected to the inner wall of the connecting sleeve 43, and one end of the connecting rod 41 passes through the connecting sleeve 43 and is fixed to the connecting seat 3; one end of the elastic element 42 is fixed to the inner wall of the connecting sleeve 43, and the other end is fixed to the connecting rod 41; the connecting sleeve 43 is fixed at the output end of the power component 6.

[0048] Specifically, when the internal pressure of the battery pack exceeds the elastic force of the moving component 4, the air pressure in the battery pack pushes the connecting seat 3 to move, opening the venting gap. The connecting rod 41 moves with the connecting seat 3, and the elastic element 42 is compressed. After the pressure relief within the battery pack is complete, the elastic element 42 returns to its original shape, the connecting rod 41 drives the connecting seat 3 to reset, and the venting gap closes. In the event of thermal runaway within the battery pack, the power component 6 is activated to push the connecting sleeve 43 to move, increasing the opening height of the connecting seat 3. In this embodiment, the elastic element is a spring.

[0049] Optionally, the connecting seat 3 is frustum-shaped, the connecting rod 41 is located at the end of the connecting seat 3 with the smaller diameter, and the valve seat 1 is provided with an inner sealing ring 8, which contacts the side wall of the connecting seat 3 to seal the exhaust gap.

[0050] Specifically, the frustum-shaped connecting seat 3 allows the connecting seat 3 to easily enter and exit from the inner ring of the inner sealing ring 8. When the explosion-proof valve is in its initial state, the inner sealing ring 8 and the side wall of the connecting seat 3 are in corresponding contact, which can improve the sealing effect of the connecting seat 3 and the valve seat 1 and prevent external moisture from entering the battery pack through the exhaust gap.

[0051] Optionally, the valve cover 2 is provided with a vent hole 10, and the connecting rod is provided with a through hole 11, with the vent hole 10 communicating with the through hole 11.

[0052] Specifically, the battery pack generates a small amount of gas during operation. To prevent the gas from accumulating inside the battery pack, through holes 11 and vent holes 10 are provided so that the gas can be directly discharged to the outside through the through holes 11 and vent holes 10.

[0053] Optionally, a waterproof and breathable membrane 12 covering the through hole 11 is provided inside the valve cover 2.

[0054] Specifically, by setting up a waterproof and breathable membrane 12, it can cover the through hole 11, preventing external moisture from entering the battery pack through the through hole 11.

[0055] Optionally, a plurality of vent holes 13 are provided in the valve seat 1, and the plurality of vent holes 13 are arranged at radial intervals along the valve seat 1.

[0056] Specifically, by setting multiple vent holes 13, when the gas pressure inside the battery pack exceeds a threshold, the gas pushes the connecting seat 3 through the vent holes 13. At this time, the movable component 4 moves upward with the connecting seat 3, and the inner sealing ring 8 opens the vent gap between the connecting seat 3 and the valve seat 1, allowing the gas to be discharged to the outside through the vent gap. When the gas pressure inside the battery pack falls below the threshold, the movable component 4 drives the connecting seat 3 to reset, and the inner sealing ring 8 closes the vent gap between the connecting seat 3 and the valve seat 1.

[0057] 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. An active explosion-proof valve, characterized in that, include: The valve seat, valve cover, connecting seat, and movable component are provided; the valve cover is disposed on the connecting seat, the movable component is disposed on the valve seat, the movable component is fixed to the connecting seat, an exhaust gap is formed between the connecting seat and the valve seat, a mounting plate is disposed on the valve seat, and a power component is disposed on the mounting plate, the power component being used to open the exhaust gap.

2. The active explosion-proof valve according to claim 1, characterized in that, The movable component includes: a connecting rod and an elastic element; the valve seat is provided with a connecting hole adapted to the connecting rod; one end of the connecting rod passes through the connecting hole and is fixed to the connecting seat; one end of the elastic element is fixed to the valve seat, and the other end is fixed to the connecting rod; the power component is used to push the connecting rod to open the exhaust gap.

3. An active explosion-proof valve according to claim 2, characterized in that, The valve seat is provided with a mounting groove, and an inner sealing ring is provided in the mounting groove; when the movable component is in the initial state, the inner sealing ring abuts against the connecting seat to seal the exhaust gap.

4. The active explosion-proof valve according to claim 1, characterized in that, The movable component includes: a connecting rod, an elastic element, and a connecting sleeve; the valve seat is provided with a connecting hole adapted to the connecting sleeve, the connecting sleeve is slidably connected to the connecting hole, the connecting rod is slidably connected to the inner wall of the connecting sleeve, one end of the connecting rod passes through the connecting sleeve and is fixed to the connecting seat; one end of the elastic element is fixed to the inner wall of the connecting sleeve, and the other end is fixed to the connecting rod; the connecting sleeve is fixed to the output end of the power component.

5. An active explosion-proof valve according to claim 4, characterized in that, The connecting seat is truncated cone-shaped, and the connecting rod is located at the end of the connecting seat with a smaller diameter. The valve seat is provided with an inner sealing ring, which contacts the side wall of the connecting seat to seal the exhaust gap.

6. An active explosion-proof valve according to claim 2 or 4, characterized in that, The valve cover has a vent hole, and the connecting rod has a through hole, with the vent hole communicating with the through hole.

7. An active explosion-proof valve according to claim 6, characterized in that, A waterproof and breathable membrane covering the through hole is provided inside the valve cover.

8. An active explosion-proof valve according to claim 6, characterized in that, The valve seat is provided with a plurality of vent holes, which are arranged at radial intervals along the valve seat.

Images