Battery pressure relief valve with novel pressure relief structure

Abstract

The utility model relates to a battery pressure relief valve with novel pressure relief structure, and its technical scheme main points are: including: valve body and valve seat, be provided with exhaust passage in the valve seat, the valve body sets up on the valve seat, be provided with umbrella -shaped valve element on the valve body, one end of umbrella -shaped valve element and the valve seat abut, the other end and the valve body abut, under the condition that umbrella -shaped valve element is in initial state, umbrella -shaped valve element closes exhaust passage, and the application is simple to install relative to the original spring structure, and the cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, and more specifically, to a battery pressure relief valve with a novel pressure relief structure. 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] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a battery pressure relief valve with a novel pressure relief structure to solve the above-mentioned technical problems.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a battery pressure relief valve with a novel pressure relief structure, comprising: a valve body and a valve seat; an exhaust channel is provided in the valve seat; the valve body is disposed on the valve seat; an umbrella-shaped valve core is disposed on the valve body; one end of the umbrella-shaped valve core abuts against the valve seat, and the other end abuts against the valve body; when the umbrella-shaped valve core is in its initial state, the umbrella-shaped valve core closes the exhaust channel.

[0007] Specifically, the umbrella-shaped valve core is made of a soft material, such as silicone or rubber. In its initial state, the lower outer edge of the umbrella-shaped valve core presses against the valve body, sealing the venting channel connected to the battery pack. When the air pressure inside the battery pack is high, the gas in the venting channel pushes the umbrella-shaped valve core towards one side of the battery pack, causing it to deform. The lower outer edge of the umbrella-shaped valve core 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 umbrella-shaped valve core, it returns to its initial state, sealing the venting channel again and isolating the battery pack from the outside environment. This application replaces the original spring structure with an umbrella-shaped valve core. During installation, it is only necessary to press the umbrella-shaped valve core against the valve seat to seal the venting channel, and then press the valve body against the valve seat to complete the assembly of the battery pressure relief valve. Compared to the original spring structure pressure relief valve, this method is simpler to install and has a lower cost.

[0008] Optionally, the valve seat includes a fixed seat and a connecting bracket; the valve body is disposed on the fixed seat, and a through hole is provided on the fixed seat; the connecting bracket is disposed on the fixed seat and located at the opening of the through hole; the gap between the through hole and the connecting bracket constitutes the exhaust channel; one end of the umbrella-shaped valve core abuts against the connecting bracket.

[0009] Specifically, the umbrella-shaped valve core is mounted on the connecting bracket and located at the center of the through hole to ensure that the air pressure through the through hole can be evenly applied to the lower end of the umbrella-shaped valve core. When the umbrella-shaped valve core is in its initial state, it closes the opening of the through hole, thereby sealing the exhaust passage.

[0010] Optionally, the fixing seat is provided with a stepped groove; the stepped groove communicates with the through hole; when the umbrella-shaped valve core is in the initial state, the umbrella-shaped valve core overlaps the inner wall of the stepped groove.

[0011] Specifically, by setting a stepped groove, the lower outer periphery of the umbrella-shaped valve core overlaps with one of the steps of the stepped groove, which can expand the output area of ​​the through hole, so that the gas in the through hole can quickly escape from the lower opening of the umbrella-shaped valve core when the umbrella-shaped valve core is opened.

[0012] Optionally, the valve body includes a valve cover; a connecting seat is provided on the valve cover; a mounting hole is provided on the connecting bracket; the connecting seat is inserted into the mounting hole, and one end of the umbrella-shaped valve core abuts against the connecting bracket, and the other end abuts against the connecting seat.

[0013] Specifically, the mounting hole is located on the connecting bracket and at the center of the through hole, so that the through hole, the umbrella-shaped valve core, and the connecting seat are at the same center. During assembly, the umbrella-shaped valve core is placed at the center of the connecting bracket. The middle part of the umbrella-shaped valve core has an opening corresponding to the connecting seat. The connecting seat is passed through the opening and the mounting hole of the umbrella-shaped valve core in sequence, and the umbrella-shaped valve core can be fixed between the connecting seat and the connecting bracket.

[0014] Optionally, the connecting seat is provided with an air outlet that communicates with the through hole, and an exhaust gap is provided between the connecting seat and the valve cover.

[0015] Specifically, when the battery pack is working normally, a small amount of gas will be generated inside the battery pack. Since the small amount of gas is difficult to push open the umbrella-shaped valve core, in order to avoid the accumulation of excessive gas during normal operation of the battery pack, an exhaust hole is provided on the connector and an exhaust gap is provided between the connector and the valve cover. At this time, the small amount of gas can be directly discharged to the outside through the exhaust hole and the exhaust gap.

[0016] Optionally, a waterproof and breathable membrane is provided on the connector.

[0017] By setting up a waterproof and breathable membrane, the vents can be covered, preventing external moisture from entering the battery pack through the vents.

[0018] Optionally, the valve seat is provided with a plurality of mounting blocks; the upper end of the mounting block abuts against the lower end of the connecting seat, the mounting block is provided with a fitting groove, and the valve cover is provided with a buckle, the buckle engaging with the fitting groove.

[0019] Specifically, during assembly, after inserting the connector into the mounting hole, the bottom end of the connector contacts the top end of the mounting block, and the mounting block supports the outer edge of the connector. Then, the valve cover is fastened onto the valve seat, and the clip is engaged in the fitting groove. At this time, there is a gap between the valve cover and the valve seat for gas to pass through, and this gap is connected to the exhaust channel.

[0020] Optionally, the valve cover has a vent hole, and the connecting seat has a fitting block; the fitting block fits into the vent hole; the exhaust gap communicates with the vent hole.

[0021] Specifically, during assembly, when the valve cover is fastened onto the valve seat, the fitting block is embedded in the vent hole. At this time, there is a gap between the fitting block and the vent hole. This gap is connected to the exhaust gap and is located above the water-blocking flange. A small amount of gas generated by the battery pack can be directly discharged to the outside through the vent hole, the exhaust gap and the gap, or it can be discharged to the outside through the exhaust gap and the gap.

[0022] Optionally, a sealing ring is provided at the lower end of the valve seat.

[0023] Specifically, since the lower end of the valve seat is fixed to the battery pack, a sealing ring is installed at the lower end of the valve seat to seal the connection between the valve seat and the battery pack, preventing outside air from entering the battery pack through the connection between the valve seat and the battery pack.

[0024] Optionally, the valve seat is provided with a water-retaining flange.

[0025] Specifically, the water-blocking flange is an annular shape with an inner height higher than the outer height, which can prevent external liquid from entering the stepped groove through the gap between the valve cover and the valve seat.

[0026] In summary, this utility model has the following beneficial effects:

[0027] In its initial state, the lower outer edge of the umbrella-shaped valve core presses against the valve body, sealing the vent passage connecting to the battery pack. When the air pressure inside the battery pack is high, the gas in the vent passage pushes the umbrella-shaped valve core towards one side of the battery pack, causing it to deform. The lower outer edge of the umbrella-shaped valve core separates from the valve body, opening the vent passage 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 umbrella-shaped valve core, it returns to its initial state, closing the vent passage again and isolating the battery pack from the outside. This application replaces the original spring structure with an umbrella-shaped valve core. During installation, it is only necessary to press the umbrella-shaped valve core against the valve seat to seal the vent passage, and then press the valve body against the valve seat to complete the assembly of the battery pressure relief valve. Compared to the original spring structure pressure relief valve, this method is simpler to install and has a lower cost. Attached Figure Description

[0028] Figure 1 This is a cross-sectional structural schematic diagram of a battery pressure relief valve according to Embodiment 1 of this utility model;

[0029] Figure 2 This is a cross-sectional view of another battery pressure relief valve in Embodiment 1 of this utility model;

[0030] Figure 3 This is a cross-sectional view of a battery pressure relief valve according to Embodiment 2 of this utility model;

[0031] Figure 4 This is a cross-sectional view of another battery pressure relief valve in Embodiment 2 of this utility model;

[0032] Figure 5 This is a schematic diagram of the overall structure of the battery pressure relief valve in Embodiment 3 of this utility model;

[0033] Figure 6 This is a cross-sectional view of the battery pressure relief valve in Embodiment 3 of this utility model;

[0034] Figure 7 This is an exploded structural diagram of the battery pressure relief valve in Embodiment 3 of this utility model;

[0035] Figure 8 This is a schematic diagram of the overall structure of the battery pressure relief valve in Embodiment 4 of this utility model;

[0036] Figure 9 This is a cross-sectional view of the battery pressure relief valve in Embodiment 4 of this utility model;

[0037] Figure 10 This is an exploded structural diagram of the battery pressure relief valve in Embodiment 4 of this utility model.

[0038] In the diagram: 1. Valve body; 101. Valve cover; 102. Connecting seat; 2. Valve seat; 21. Fixing seat; 22. Connecting bracket; 3. Exhaust channel; 4. Umbrella-shaped valve core; 5. Through hole; 6. Stepped groove; 7. Mounting hole; 8. Vent hole; 9. Exhaust gap; 10. Waterproof and breathable membrane; 11. Sealing ring; 12. Mounting block; 13. Fitting groove; 14. Snap fastener; 15. Water-blocking flange; 16. Vent hole; 17. Fitting block. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Example 1

[0043] This embodiment provides a battery pressure relief valve with a novel pressure relief structure, such as... Figure 1 and Figure 2 As shown, it includes: valve body 1 and valve seat 2; an exhaust passage 3 is provided in the valve seat 2; valve body 1 is provided on the valve seat 2; an umbrella-shaped valve core 4 is provided on the valve body 1; one end of the umbrella-shaped valve core 4 abuts against the valve seat 2 and the other end abuts against the valve body 1. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the exhaust passage 3.

[0044] Specifically, the umbrella-shaped valve core 4 is made of a soft material, such as silicone or rubber. In its initial state, the lower outer periphery of the umbrella-shaped valve core 4 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 umbrella-shaped valve core 4 towards one side of the battery pack, causing it to deform. The lower outer periphery of the umbrella-shaped valve core 4 separates from the valve body 1, at which point the exhaust channel 3 opens, allowing gas to escape from the battery pack. As the pressure inside the battery pack decreases, when the pressure is insufficient to deform the umbrella-shaped valve core 4, it returns to its initial state, sealing the exhaust channel 3 again and isolating the battery pack from the outside world. This application replaces the original spring structure with an umbrella-shaped valve core 4. During installation, the umbrella-shaped valve core 4 only needs to be pressed against the valve seat 2 to close the exhaust channel 3 of the valve seat 2. Then, the valve body 1 is pressed against the valve seat 2 to complete the assembly of the battery pressure relief valve. Compared with the original spring structure pressure relief valve, the installation is simpler and the cost is lower.

[0045] Optionally, the valve seat 2 includes a fixed seat 21 and a connecting bracket 22; the valve body 1 is disposed on the fixed seat 21, and a through hole 5 is provided on the fixed seat 21; the connecting bracket 22 is disposed on the fixed seat 21 and located at the opening of the through hole 5; the gap between the through hole 5 and the connecting bracket 22 forms an exhaust channel 3; the umbrella-shaped valve core 4 is disposed on the connecting bracket 22.

[0046] Specifically, the umbrella-shaped valve core 4 is mounted on the connecting bracket 22 and located at the center of the through hole 5 to ensure that the air pressure through the through hole 5 can be evenly applied to the lower end of the umbrella-shaped valve core 4. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the opening of the through hole 5, thereby closing the exhaust channel 3.

[0047] Optionally, the valve body 1 includes a valve cover 101, which abuts against the upper end of the umbrella-shaped valve core 4. Several vent holes are provided on the outer wall of the valve seat 2. When the air pressure inside the battery pack is high, the gas in the exhaust channel 3 pushes the umbrella-shaped valve core 4 towards one side of the battery pack, causing the umbrella-shaped valve core 4 to deform. The lower periphery of the umbrella-shaped valve core 4 separates from the valve body 1. At this time, the exhaust channel 3 opens, and gas can be discharged from the battery pack through the exhaust channel 3 and the vent holes.

[0048] Example 2

[0049] This embodiment provides a battery pressure relief valve with a novel pressure relief structure, such as... Figure 3 and Figure 4 As shown, it includes: valve body 1 and valve seat 2; an exhaust passage 3 is provided in the valve seat 2; valve body 1 is provided on the valve seat 2; an umbrella-shaped valve core 4 is provided on the valve body 1; one end of the umbrella-shaped valve core 4 abuts against the valve seat 2 and the other end abuts against the valve body 1. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the exhaust passage 3.

[0050] Specifically, the umbrella-shaped valve core 4 is made of a soft material, such as silicone or rubber. In its initial state, the lower outer periphery of the umbrella-shaped valve core 4 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 umbrella-shaped valve core 4 towards one side of the battery pack, causing it to deform. The lower outer periphery of the umbrella-shaped valve core 4 separates from the valve body 1, at which point the exhaust channel 3 opens, allowing gas to escape from the battery pack. As the pressure inside the battery pack decreases, when the pressure is insufficient to deform the umbrella-shaped valve core 4, it returns to its initial state, sealing the exhaust channel 3 again and isolating the battery pack from the outside world. This application replaces the original spring structure with an umbrella-shaped valve core 4. During installation, the umbrella-shaped valve core 4 only needs to be pressed against the valve seat 2 to close the exhaust channel 3 of the valve seat 2. Then, the valve body 1 is pressed against the valve seat 2 to complete the assembly of the battery pressure relief valve. Compared with the original spring structure pressure relief valve, the installation is simpler and the cost is lower.

[0051] Optionally, the valve seat 2 includes a fixed seat 21 and a connecting bracket 22; the valve body 1 is disposed on the fixed seat 21, and a through hole 5 is provided on the fixed seat 21; the connecting bracket 22 is disposed on the fixed seat 21 and located at the opening of the through hole 5; the gap between the through hole 5 and the connecting bracket 22 forms an exhaust channel 3; the umbrella-shaped valve core 4 is disposed on the connecting bracket 22.

[0052] Specifically, the umbrella-shaped valve core 4 is mounted on the connecting bracket 22 and located at the center of the through hole 5 to ensure that the air pressure through the through hole 5 can be evenly applied to the lower end of the umbrella-shaped valve core 4. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the opening of the through hole 5, thereby closing the exhaust channel 3.

[0053] Optionally, the valve body 1 includes a valve cover 101; a connecting seat 102 is provided on the valve cover 101; a mounting hole 7 is provided on the connecting bracket 22; the connecting seat 102 is inserted into the mounting hole 7, one end of the umbrella-shaped valve core 4 abuts against the connecting bracket 22, and the other end abuts against the connecting seat 102.

[0054] Specifically, the mounting hole 7 is located on the connecting bracket 22 at the center of the through hole 5, so that the through hole 5, the umbrella-shaped valve core 4, and the connecting seat 102 are at the same center. During assembly, the umbrella-shaped valve core 4 is placed at the center of the connecting bracket 22. The umbrella-shaped valve core 4 has a vent hole in its middle, and the connecting seat 102 has an outlet hole 8 communicating with the vent hole. A venting gap is provided on the valve cover 101. When the battery pack is working normally, a small amount of gas will be generated inside the battery pack. Since the small amount of gas is difficult to push open the umbrella-shaped valve core 4, in order to avoid the accumulation of excessive gas during normal operation of the battery pack, a vent hole is provided in the middle of the umbrella-shaped valve core 4, and an outlet hole 8 communicating with the vent hole is provided on the connecting seat 102. A venting gap is provided on the valve cover 101. At this time, the small amount of gas can be directly discharged to the outside through the vent hole, the outlet hole 8, and the venting gap. A waterproof and breathable membrane 10 is also provided on the connecting seat 102.

[0055] Example 3

[0056] This embodiment provides a battery pressure relief valve with a novel pressure relief structure, such as... Figures 5-7 As shown, it includes: valve body 1 and valve seat 2; an exhaust passage 3 is provided in the valve seat 2; valve body 1 is provided on the valve seat 2; an umbrella-shaped valve core 4 is provided on the valve body 1; one end of the umbrella-shaped valve core 4 abuts against the valve seat 2 and the other end abuts against the valve body 1. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the exhaust passage 3.

[0057] Specifically, the umbrella-shaped valve core 4 is made of a soft material, such as silicone or rubber. In its initial state, the lower outer periphery of the umbrella-shaped valve core 4 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 umbrella-shaped valve core 4 towards one side of the battery pack, causing it to deform. The lower outer periphery of the umbrella-shaped valve core 4 separates from the valve body 1, at which point the exhaust channel 3 opens, allowing gas to escape from the battery pack. As the pressure inside the battery pack decreases, when the pressure is insufficient to deform the umbrella-shaped valve core 4, it returns to its initial state, sealing the exhaust channel 3 again and isolating the battery pack from the outside world. This application replaces the original spring structure with an umbrella-shaped valve core 4. During installation, the umbrella-shaped valve core 4 only needs to be pressed against the valve seat 2 to close the exhaust channel 3 of the valve seat 2. Then, the valve body 1 is pressed against the valve seat 2 to complete the assembly of the battery pressure relief valve. Compared with the original spring structure pressure relief valve, the installation is simpler and the cost is lower.

[0058] Optionally, the valve seat 2 includes a fixed seat 21 and a connecting bracket 22; the valve body 1 is disposed on the fixed seat 21, and a through hole 5 is provided on the fixed seat 21; the connecting bracket 22 is disposed on the fixed seat 21 and located at the opening of the through hole 5; the gap between the through hole 5 and the connecting bracket 22 forms an exhaust channel 3; the umbrella-shaped valve core 4 is disposed on the connecting bracket 22.

[0059] Specifically, the umbrella-shaped valve core 4 is mounted on the connecting bracket 22 and located at the center of the through hole 5 to ensure that the air pressure through the through hole 5 can be evenly applied to the lower end of the umbrella-shaped valve core 4. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the opening of the through hole 5, thereby closing the exhaust channel 3.

[0060] Optionally, a stepped groove 6 is provided on the fixed base 21; the stepped groove 6 communicates with the through hole 5; when the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 overlaps the inner wall of the stepped groove 6.

[0061] Specifically, by setting the stepped groove 6, the lower outer periphery of the umbrella-shaped valve core 4 overlaps on one of the steps of the stepped groove 6, which can expand the output area of ​​the through hole 5 so that the gas in the through hole 5 can quickly escape from the lower opening of the umbrella-shaped valve core 4 when the umbrella-shaped valve core 4 is opened.

[0062] Optionally, the valve body 1 includes a valve cover 101; a connecting seat 102 is provided on the valve cover 101; a mounting hole 7 is provided on the connecting bracket 22; the connecting seat 102 is inserted into the mounting hole 7, one end of the umbrella-shaped valve core 4 abuts against the connecting bracket 22, and the other end abuts against the connecting seat 102.

[0063] Specifically, the mounting hole 7 is set on the connecting bracket 22 and located at the center of the through hole 5, so that the through hole 5, the umbrella-shaped valve core 4 and the connecting seat 102 are at the same center. During assembly, the umbrella-shaped valve core 4 is placed at the center of the connecting bracket 22. The middle part of the umbrella-shaped valve core 4 has an opening corresponding to the connecting seat 102. The connecting seat 102 is passed through the opening of the umbrella-shaped valve core 4 and the mounting hole 7 in sequence, so that the umbrella-shaped valve core 4 can be fixed between the connecting seat 102 and the connecting bracket 22.

[0064] Optionally, the connecting seat 102 is provided with an air outlet 8 communicating with the through hole 5, and an exhaust gap 9 is provided between the connecting seat 102 and the valve cover 101.

[0065] Specifically, when the battery pack is working normally, a small amount of gas will be generated inside the battery pack. Since the small amount of gas is difficult to push open the umbrella-shaped valve core 4, in order to avoid the accumulation of excessive gas during normal operation of the battery pack, an air outlet 8 is provided on the connecting seat 102, and an exhaust gap 9 is provided between the connecting seat 102 and the valve cover 101. At this time, the small amount of gas can be directly discharged to the outside through the air outlet 8 and the exhaust gap 9.

[0066] Optionally, a waterproof and breathable membrane 10 is provided on the connector 102.

[0067] By setting up a waterproof and breathable membrane 10, the vent 8 can be covered, preventing external moisture from entering the battery pack through the vent 8.

[0068] Optionally, a sealing ring 11 is provided at the lower end of the valve seat 2.

[0069] Specifically, since the lower end of the valve seat 2 is fixed to the battery pack, a sealing ring 11 is provided at the lower end of the valve seat 2 to seal the connection between the valve seat 2 and the battery pack, preventing outside air from entering the battery pack from the connection between the valve seat 2 and the battery pack.

[0070] Optionally, the valve seat 2 is provided with a plurality of mounting blocks 12; the upper end of the mounting block 12 abuts against the lower end of the connecting seat 102, the mounting block 12 is provided with a fitting groove 13, and the valve cover 101 is provided with a buckle 14, which engages with the fitting groove 13.

[0071] Specifically, during assembly, after the connector 102 is inserted into the mounting hole 7, the bottom end of the connector 102 contacts the top end of the mounting block 12, and the mounting block 12 supports the outer edge of the connector 102. Then, the valve cover 101 is fastened onto the valve seat 2, and the buckle 14 is fastened into the fitting groove 13. At this time, there is a gap between the valve cover 101 and the valve seat 2 for gas to pass through, and this gap is connected to the exhaust channel 3.

[0072] Optionally, a water-blocking flange 15 is provided on the valve seat 2.

[0073] Specifically, the water-blocking flange 15 is an annular shape with an inner height higher than the outer height, which can prevent external liquid from entering the stepped groove 6 through the gap between the valve cover 101 and the valve seat 2.

[0074] Example 4

[0075] This embodiment provides a battery pressure relief valve with a novel pressure relief structure, such as... Figures 8-10 As shown, it includes: valve body 1 and valve seat 2; an exhaust passage 3 is provided in the valve seat 2; valve body 1 is provided on the valve seat 2; an umbrella-shaped valve core 4 is provided on the valve body 1; one end of the umbrella-shaped valve core 4 abuts against the valve seat 2 and the other end abuts against the valve body 1. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the exhaust passage 3.

[0076] Specifically, the umbrella-shaped valve core 4 is made of a soft material, such as silicone or rubber. In its initial state, the lower outer periphery of the umbrella-shaped valve core 4 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 umbrella-shaped valve core 4 towards one side of the battery pack, causing it to deform. The lower outer periphery of the umbrella-shaped valve core 4 separates from the valve body 1, at which point the exhaust channel 3 opens, allowing gas to escape from the battery pack. As the pressure inside the battery pack decreases, when the pressure is insufficient to deform the umbrella-shaped valve core 4, it returns to its initial state, sealing the exhaust channel 3 again and isolating the battery pack from the outside world. This application replaces the original spring structure with an umbrella-shaped valve core 4. During installation, the umbrella-shaped valve core 4 only needs to be pressed against the valve seat 2 to close the exhaust channel 3 of the valve seat 2. Then, the valve body 1 is pressed against the valve seat 2 to complete the assembly of the battery pressure relief valve. Compared with the original spring structure pressure relief valve, the installation is simpler and the cost is lower.

[0077] Optionally, the valve seat 2 includes a fixed seat 21 and a connecting bracket 22; the valve body 1 is disposed on the fixed seat 21, and a through hole 5 is provided on the fixed seat 21; the connecting bracket 22 is disposed on the fixed seat 21 and located at the opening of the through hole 5; the gap between the through hole 5 and the connecting bracket 22 forms an exhaust channel 3; the umbrella-shaped valve core 4 is disposed on the connecting bracket 22.

[0078] Specifically, the umbrella-shaped valve core 4 is mounted on the connecting bracket 22 and located at the center of the through hole 5 to ensure that the air pressure through the through hole 5 can be evenly applied to the lower end of the umbrella-shaped valve core 4. When the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 closes the opening of the through hole 5, thereby closing the exhaust channel 3.

[0079] Optionally, a stepped groove 6 is provided on the fixed base 21; the stepped groove 6 communicates with the through hole 5; when the umbrella-shaped valve core 4 is in the initial state, the umbrella-shaped valve core 4 overlaps the inner wall of the stepped groove 6.

[0080] Specifically, by setting the stepped groove 6, the lower outer periphery of the umbrella-shaped valve core 4 overlaps on one of the steps of the stepped groove 6, which can expand the output area of ​​the through hole 5 so that the gas in the through hole 5 can quickly escape from the lower opening of the umbrella-shaped valve core 4 when the umbrella-shaped valve core 4 is opened.

[0081] Optionally, the valve body 1 includes a valve cover 101; a connecting seat 102 is provided on the valve cover 101; a mounting hole 7 is provided on the connecting bracket 22; the connecting seat 102 is inserted into the mounting hole 7, one end of the umbrella-shaped valve core 4 abuts against the connecting bracket 22, and the other end abuts against the connecting seat 102.

[0082] Specifically, the mounting hole 7 is set on the connecting bracket 22 and located at the center of the through hole 5, so that the through hole 5, the umbrella-shaped valve core 4 and the connecting seat 102 are at the same center. During assembly, the umbrella-shaped valve core 4 is placed at the center of the connecting bracket 22. The middle part of the umbrella-shaped valve core 4 has an opening corresponding to the connecting seat 102. The connecting seat 102 is passed through the opening of the umbrella-shaped valve core 4 and the mounting hole 7 in sequence, so that the umbrella-shaped valve core 4 can be fixed between the connecting seat 102 and the connecting bracket 22.

[0083] Optionally, the connecting seat 102 is provided with an air outlet 8 communicating with the through hole 5, and an exhaust gap 9 is provided between the connecting seat 102 and the valve cover 101.

[0084] Specifically, when the battery pack is working normally, a small amount of gas will be generated inside the battery pack. Since the small amount of gas is difficult to push open the umbrella-shaped valve core 4, in order to avoid the accumulation of excessive gas during normal operation of the battery pack, an air outlet 8 is provided on the connecting seat 102, and an exhaust gap 9 is provided between the connecting seat 102 and the valve cover 101. At this time, the small amount of gas can be directly discharged to the outside through the air outlet 8 and the exhaust gap 9.

[0085] Optionally, a waterproof and breathable membrane 10 is provided on the connector 102.

[0086] By setting up a waterproof and breathable membrane 10, the vent 8 can be covered, preventing external moisture from entering the battery pack through the vent 8.

[0087] Optionally, a sealing ring 11 is provided at the lower end of the valve seat 2.

[0088] Specifically, since the lower end of the valve seat 2 is fixed to the battery pack, a sealing ring 11 is provided at the lower end of the valve seat 2 to seal the connection between the valve seat 2 and the battery pack, preventing outside air from entering the battery pack from the connection between the valve seat 2 and the battery pack.

[0089] Optionally, the valve seat 2 is provided with a plurality of mounting blocks 12; the upper end of the mounting block 12 abuts against the lower end of the connecting seat 102, the mounting block 12 is provided with a fitting groove 13, and the valve cover 101 is provided with a buckle 14, which engages with the fitting groove 13.

[0090] Specifically, during assembly, after the connector 102 is inserted into the mounting hole 7, the bottom end of the connector 102 contacts the top end of the mounting block 12, and the mounting block 12 supports the outer edge of the connector 102. Then, the valve cover 101 is fastened onto the valve seat 2, and the buckle 14 is fastened into the fitting groove 13. At this time, there is a gap between the valve cover 101 and the valve seat 2 for gas to pass through, and this gap is connected to the exhaust channel 3.

[0091] Optionally, a water-blocking flange 15 is provided on the valve seat 2.

[0092] Specifically, the water-blocking flange 15 is an annular shape with an inner height higher than the outer height, which can prevent external liquid from entering the stepped groove 6 through the gap between the valve cover 101 and the valve seat 2.

[0093] Optionally, a vent hole 16 is provided on the valve cover 101, and a fitting block 17 is provided on the connecting seat 102; the fitting block 17 fits into the vent hole 16; the exhaust gap 9 communicates with the vent hole 16.

[0094] Specifically, during assembly, when the valve cover 101 is fastened onto the valve seat 2, the fitting block 17 is embedded in the vent hole 16. At this time, there is a gap between the fitting block 17 and the vent hole 16. This gap is connected to the exhaust gap 9, and the gap is located above the water-blocking flange 15. A small amount of gas generated by the battery pack can be directly discharged to the outside through the vent hole 8, the exhaust gap 9, and the gap, or it can be discharged to the outside through the exhaust gap 9 and the gap.

[0095] 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 battery pressure relief valve with a novel pressure relief structure, characterized in that, include: A valve body and a valve seat; an exhaust passage is provided in the valve seat; the valve body is disposed on the valve seat; an umbrella-shaped valve core is disposed on the valve body; one end of the umbrella-shaped valve core abuts against the valve seat, and the other end abuts against the valve body; when the umbrella-shaped valve core is in its initial state, the umbrella-shaped valve core closes the exhaust passage.

2. The battery pressure relief valve with a novel pressure relief structure according to claim 1, characterized in that, The valve seat includes a fixed seat and a connecting bracket; the valve body is disposed on the fixed seat, and a through hole is provided on the fixed seat; the connecting bracket is disposed on the fixed seat and located at the opening of the through hole; the gap between the through hole and the connecting bracket constitutes the exhaust channel; one end of the umbrella-shaped valve core abuts against the connecting bracket.

3. A battery pressure relief valve with a novel pressure relief structure according to claim 2, characterized in that, The fixed base is provided with a stepped groove; the stepped groove is connected to the through hole; when the umbrella-shaped valve core is in the initial state, the umbrella-shaped valve core overlaps the inner wall of the stepped groove.

4. A battery pressure relief valve with a novel pressure relief structure according to claim 2, characterized in that, The valve body includes a valve cover; a connecting seat is provided on the valve cover; a mounting hole is provided on the connecting bracket; the connecting seat is inserted into the mounting hole, and one end of the umbrella-shaped valve core abuts against the connecting bracket, and the other end abuts against the connecting seat.

5. A battery pressure relief valve with a novel pressure relief structure according to claim 4, characterized in that, The connecting seat has an air outlet that communicates with the through hole, and an exhaust gap is provided between the connecting seat and the valve cover.

6. A battery pressure relief valve with a novel pressure relief structure according to claim 4, characterized in that, A waterproof and breathable membrane is provided on the connecting seat.

7. A battery pressure relief valve with a novel pressure relief structure according to claim 4, characterized in that, The valve seat is provided with a plurality of mounting blocks; the upper end of the mounting block abuts against the lower end of the connecting seat, the mounting block is provided with a fitting groove, and the valve cover is provided with a buckle, which engages with the fitting groove.

8. A battery pressure relief valve with a novel pressure relief structure according to claim 4, characterized in that, The valve cover has a vent hole, and the connecting seat has a fitting block; the fitting block fits into the vent hole; the exhaust gap communicates with the vent hole.

9. A battery pressure relief valve with a novel pressure relief structure according to claim 1, characterized in that, A sealing ring is provided at the lower end of the valve seat.

10. A battery pressure relief valve with a novel pressure relief structure according to claim 1, characterized in that, The valve seat is provided with a water-blocking flange.

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