A battery pressure relief valve that is easy to assemble

Abstract

This utility model relates to a battery pressure relief valve that is easy to assemble. The key technical features are: it includes a valve cover and a valve seat; a movable component is provided on the valve seat, and a connecting seat is provided on the valve cover; the movable component is fixed to the connecting seat; the connecting seat and the valve cover correspond to form a mounting groove, and an inner sealing ring is provided in the mounting groove; an exhaust gap is formed between the valve seat and the connecting seat; when the movable component is in its initial state, the inner sealing ring closes the exhaust gap. By placing the inner sealing ring between the valve cover and the connecting seat, this application reduces one pressing step, requiring only one compression to complete the assembly of the pressure relief valve, thus improving assembly efficiency and saving costs.

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 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] In the prior art, Chinese patent application CN202310293063.X discloses a pressure relief valve, including a valve seat, a valve body, and a sliding assembly. The valve body is disposed on the valve seat, and a pressure relief gap is provided between the valve body and the valve seat. The valve body is connected to the valve seat through the sliding assembly, which includes a hollow guide rod and an elastic element. The elastic element is used to seal the opposite sides of the valve seat and the valve body. The two ends of the hollow guide rod are respectively used to communicate with the valve body and the battery pack. In the above-mentioned pressure relief valve, the first sealing element is disposed in the first sealing element receiving groove of the valve seat. Since the valve seat is usually integrally formed, pressure machinery is required to compress the first sealing element and press it into the first sealing element receiving groove during assembly. This assembly method is relatively cumbersome, inefficient, and costly. Therefore, proposing a battery pressure relief valve that is easy to assemble has become a technical problem that urgently needs to be solved by 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 that is easy to assemble, so as 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 that is easy to assemble, comprising: a valve cover and a valve seat; a movable component is provided on the valve seat, and a connecting seat is provided on the valve cover, the movable component being fixed to the connecting seat; the connecting seat and the valve cover correspondingly contact to form a mounting groove, and an inner sealing ring is provided in the mounting groove; an exhaust gap is formed between the valve seat and the connecting seat, and when the movable component is in the initial state, the inner sealing ring closes the exhaust gap.

[0007] Specifically, when assembling the pressure relief valve, first place the inner sealing ring inside the valve cover, then install the connecting seat on the valve cover. At this point, the inner sealing ring is embedded in the mounting groove by the valve cover and the connecting seat. Finally, place the valve cover inside the valve seat and fix the valve cover with the movable component to complete the assembly of the pressure relief valve. Since the valve cover and the connecting seat need to be pressed together during assembly, placing the inner sealing ring between the valve cover and the connecting seat reduces one pressing step. Only one compression is needed to complete the assembly of the pressure relief valve, improving assembly efficiency and saving costs.

[0008] Optionally, a connecting groove is provided on the valve cover, the connecting groove communicating with the mounting groove, and the connecting seat is disposed in the connecting groove.

[0009] Specifically, by connecting the connecting groove and the mounting groove, it is possible to squeeze the inner sealing ring when the connecting seat is pressed into the connecting groove, so that the inner sealing ring is embedded in the mounting groove.

[0010] Optionally, a first blocking ring is provided on the connecting seat, and a second blocking ring is provided on the valve cover and on the inner wall of the mounting groove; both the first blocking ring and the second blocking ring abut against the inner sealing ring.

[0011] Specifically, by setting a first blocking ring and a second blocking ring, the position of the inner sealing ring can be restricted, preventing the inner sealing ring from detaching from the mounting groove.

[0012] 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.

[0013] 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.

[0014] Optionally, the movable component includes: a spring and a connecting rod; a connecting hole corresponding to and adapted to the connecting rod is provided on the valve seat, and the connecting rod passes through the connecting hole and is fixed to the connecting seat; the spring is sleeved on the connecting rod, one end of the spring abuts against the valve seat, and the other end abuts against the end of the connecting rod away from the connecting seat.

[0015] Specifically, a spring applies an elastic force to the connecting rod, causing the connecting rod to press the connecting seat against the valve seat. The inner sealing ring then seals the venting gap between the connecting seat and the valve seat. When the gas pressure inside the battery pack exceeds a threshold, gas pushes the connecting seat through the vent. At this time, the connecting rod moves upward with the connecting seat, compressing the spring. The inner sealing ring then opens the venting gap between the connecting seat and the valve seat, allowing gas to escape to the outside. When the gas pressure inside the battery pack falls below the threshold, the spring returns to its original shape, pushing the connecting rod. The connecting rod then resets the connecting seat, and the inner sealing ring seals the venting gap between the connecting seat and the valve seat.

[0016] Optionally, the connecting rod includes: a connecting sleeve and a fixing screw; the connecting sleeve is sleeved on the fixing screw and disposed in the connecting hole; the fixing screw is fixed to the connecting seat, the spring is sleeved on the connecting sleeve, and the other end of the spring abuts against the fixing screw.

[0017] Specifically, the connecting sleeve is directly fixed to the connecting seat by a fixing screw, and the end of the spring abuts against the screw head of the fixing screw, which makes it easy to press the spring onto the valve seat during assembly.

[0018] Optionally, the fixing screw has a through hole, and the valve cover has a vent hole; the vent hole communicates with the through hole.

[0019] 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.

[0020] Optionally, a waterproof and breathable membrane is provided on the connector; the waterproof and breathable membrane covers the through hole.

[0021] 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.

[0022] Optionally, an outer sealing ring is provided on the side of the valve seat facing the battery pack.

[0023] Specifically, by setting an external sealing ring, the pressure-bearing surfaces of the valve seat and battery pack can be sealed.

[0024] In summary, this utility model has the following beneficial effects:

[0025] When assembling the pressure relief valve, first place the inner sealing ring inside the valve cover, then install the connecting seat on the valve cover. At this time, the inner sealing ring is embedded in the mounting groove by the valve cover and the connecting seat. Then, place the valve cover in the valve seat and fix the valve cover by the moving component to complete the assembly of the pressure relief valve. Since the valve cover and the connecting seat need to be pressed together during assembly, placing the inner sealing ring between the valve cover and the connecting seat can reduce one pressing step. Only one compression is needed to complete the assembly of the pressure relief valve, improving assembly efficiency and saving costs. Attached Figure Description

[0026] Figure 1 This is a partial cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0027] Figure 2 yes Figure 1 A magnified structural diagram of A in the middle;

[0028] Figure 3 This is an exploded structural diagram of an embodiment of the present invention.

[0029] In the diagram: 1. Valve cover; 2. Valve seat; 3. Moving component; 31. Spring; 32. Connecting rod; 321. Connecting sleeve; 322. Fixing screw; 4. Connecting seat; 5. Mounting groove; 6. Inner sealing ring; 7. Connecting groove; 8. First blocking ring; 9. Second blocking ring; 10. Vent hole; 11. Connecting hole; 12. Through hole; 13. Vent hole; 14. Waterproof and breathable membrane; 15. Outer sealing ring. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Example 1

[0034] This embodiment provides a battery pressure relief valve that is easy to assemble, such as... Figure 1-3 As shown, it includes: a valve cover 1 and a valve seat 2; a movable component 3 is provided on the valve seat 2, and a connecting seat 4 is provided on the valve cover 1, the movable component 3 and the connecting seat 4 are fixed; the connecting seat 4 and the valve cover 1 are in corresponding contact to form a mounting groove 5, and an inner sealing ring 6 is provided in the mounting groove 5; an exhaust gap is formed between the valve seat 2 and the connecting seat 4, and when the movable component 3 is in the initial state, the inner sealing ring 6 closes the exhaust gap.

[0035] Specifically, when assembling the pressure relief valve, first place the inner sealing ring 6 inside the valve cover 1, then install the connecting seat 4 on the valve cover 1. At this time, the inner sealing ring 6 is embedded in the mounting groove 5 by the constraint of the valve cover 1 and the connecting seat 4. Then, place the valve cover 1 inside the valve seat 2 and fix the valve cover 1 by the movable component 3 to complete the assembly of the pressure relief valve. Since the valve cover 1 and the connecting seat 4 need to be pressed together during assembly, by placing the inner sealing ring 6 between the valve cover 1 and the connecting seat 4, one pressing process can be reduced. Only one compression is needed to complete the assembly of the pressure relief valve, which improves assembly efficiency and saves costs.

[0036] Optionally, a connecting groove 7 is provided on the valve cover 1, the connecting groove 7 is connected to the mounting groove 5, and the connecting seat 4 is disposed in the connecting groove 7.

[0037] Specifically, by connecting the connecting groove 7 and the mounting groove 5, it is possible to squeeze the inner sealing ring 6 when the connecting seat 4 is pressed into the connecting groove 7, so that the inner sealing ring 6 is embedded in the mounting groove 5.

[0038] Optionally, a first blocking ring 8 is provided on the connecting seat 4, and a second blocking ring 9 is provided on the valve cover 1 and on the inner wall of the mounting groove 5; both the first blocking ring 8 and the second blocking ring 9 abut against the inner sealing ring 6.

[0039] Specifically, by setting the first blocking ring 8 and the second blocking ring 9, the position of the inner sealing ring 6 can be restricted, preventing the inner sealing ring 6 from detaching from the mounting groove 5.

[0040] Optionally, a plurality of vent holes 10 are provided in the valve seat 2, and the plurality of vent holes 10 are arranged at radial intervals along the valve seat 2.

[0041] Specifically, by setting multiple vent holes 10, when the gas pressure inside the battery pack exceeds a threshold, the gas pushes the connecting seat 4 through the vent holes 10. At this time, the movable component 3 moves upward with the connecting seat 4, and the inner sealing ring 6 opens the vent gap between the connecting seat 4 and the valve seat 2, 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 3 drives the connecting seat 4 to reset, and the inner sealing ring 6 closes the vent gap between the connecting seat 4 and the valve seat 2.

[0042] Optionally, an outer sealing ring 15 is provided on the side of the valve seat 2 facing the battery pack.

[0043] Specifically, by setting the outer sealing ring 15, the contact pressure surface between the valve seat 2 and the battery pack can be sealed.

[0044] Example 2

[0045] This embodiment provides a battery pressure relief valve that is easy to assemble, such as... Figure 1-3 As shown, it includes: a valve cover 1 and a valve seat 2; a movable component 3 is provided on the valve seat 2, and a connecting seat 4 is provided on the valve cover 1, the movable component 3 and the connecting seat 4 are fixed; the connecting seat 4 and the valve cover 1 are in corresponding contact to form a mounting groove 5, and an inner sealing ring 6 is provided in the mounting groove 5; an exhaust gap is formed between the valve seat 2 and the connecting seat 4, and when the movable component 3 is in the initial state, the inner sealing ring 6 closes the exhaust gap.

[0046] Specifically, when assembling the pressure relief valve, first place the inner sealing ring 6 inside the valve cover 1, then install the connecting seat 4 on the valve cover 1. At this time, the inner sealing ring 6 is embedded in the mounting groove 5 by the constraint of the valve cover 1 and the connecting seat 4. Then, place the valve cover 1 inside the valve seat 2 and fix the valve cover 1 by the movable component 3 to complete the assembly of the pressure relief valve. Since the valve cover 1 and the connecting seat 4 need to be pressed together during assembly, by placing the inner sealing ring 6 between the valve cover 1 and the connecting seat 4, one pressing process can be reduced. Only one compression is needed to complete the assembly of the pressure relief valve, which improves assembly efficiency and saves costs.

[0047] Optionally, a connecting groove 7 is provided on the valve cover 1, the connecting groove 7 is connected to the mounting groove 5, and the connecting seat 4 is disposed in the connecting groove 7.

[0048] Specifically, by connecting the connecting groove 7 and the mounting groove 5, it is possible to squeeze the inner sealing ring 6 when the connecting seat 4 is pressed into the connecting groove 7, so that the inner sealing ring 6 is embedded in the mounting groove 5.

[0049] Optionally, a first blocking ring 8 is provided on the connecting seat 4, and a second blocking ring 9 is provided on the valve cover 1 and on the inner wall of the mounting groove 5; both the first blocking ring 8 and the second blocking ring 9 abut against the inner sealing ring 6.

[0050] Specifically, by setting the first blocking ring 8 and the second blocking ring 9, the position of the inner sealing ring 6 can be restricted, preventing the inner sealing ring 6 from detaching from the mounting groove 5.

[0051] Optionally, a plurality of vent holes 10 are provided in the valve seat 2, and the plurality of vent holes 10 are arranged at radial intervals along the valve seat 2.

[0052] Specifically, by setting multiple vent holes 10, when the gas pressure inside the battery pack exceeds a threshold, the gas pushes the connecting seat 4 through the vent holes 10. At this time, the movable component 3 moves upward with the connecting seat 4, and the inner sealing ring 6 opens the vent gap between the connecting seat 4 and the valve seat 2, 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 3 drives the connecting seat 4 to reset, and the inner sealing ring 6 closes the vent gap between the connecting seat 4 and the valve seat 2.

[0053] Optionally, the movable component 3 includes: a spring 31 and a connecting rod 32; a connecting hole 11 corresponding to and adapted to the connecting rod 32 is provided on the valve seat 2, and the connecting rod 32 passes through the connecting hole 11 and is fixed to the connecting seat 4; the spring 31 is sleeved on the connecting rod 32, one end of the spring 31 abuts against the valve seat 2, and the other end abuts against the end of the connecting rod 32 away from the connecting seat 4.

[0054] Specifically, the spring 31 applies an elastic force to the connecting rod 32, causing the connecting rod 32 to press the connecting seat 4 against the valve seat 2. The inner sealing ring 6 then seals the exhaust gap between the connecting seat 4 and the valve seat 2. When the gas pressure inside the battery pack exceeds a threshold, gas pushes the connecting seat 4 through the exhaust port 10. At this time, the connecting rod 32 moves upward with the connecting seat 4, the spring 31 compresses, and the inner sealing ring 6 opens the exhaust gap between the connecting seat 4 and the valve seat 2, allowing gas to escape to the outside. When the gas pressure inside the battery pack falls below the threshold, the spring 31 returns to its original shape and pushes the connecting rod 32, causing the connecting seat 4 to reset. The inner sealing ring 6 then seals the exhaust gap between the connecting seat 4 and the valve seat 2.

[0055] Optionally, the connecting rod 32 includes: a connecting sleeve 321 and a fixing screw 322; the connecting sleeve 321 is sleeved on the fixing screw 322 and the connecting sleeve 321 is disposed in the connecting hole 11; the fixing screw 322 is fixed to the connecting seat 4, and the spring 31 is sleeved on the connecting sleeve 321, with the other end of the spring 31 abutting against the fixing screw 322.

[0056] Specifically, the connecting sleeve 321 is directly fixed to the connecting seat 4 by the fixing screw 322, and the end of the spring 31 abuts against the screw head of the fixing screw 322, so that the spring 31 can be pressed onto the valve seat 2 during assembly.

[0057] Optionally, a through hole 12 is provided on the fixing screw 322, and a vent hole 13 is provided on the valve cover 1; the vent hole 13 is connected to the through hole 12.

[0058] Specifically, the battery pack generates a small amount of gas during operation. To prevent the gas from accumulating inside the battery pack, through holes 12 and vent holes 13 are provided so that the gas can be directly discharged to the outside through the through holes 12 and vent holes 13.

[0059] Optionally, a waterproof and breathable membrane 14 is provided on the connecting seat 4; the waterproof and breathable membrane 14 covers the through hole 12.

[0060] Specifically, by setting up a waterproof and breathable membrane 14, it can cover the through hole 12, preventing external moisture from entering the battery pack through the through hole 12.

[0061] Optionally, an outer sealing ring 15 is provided on the side of the valve seat 2 facing the battery pack.

[0062] Specifically, by setting the outer sealing ring 15, the contact pressure surface between the valve seat 2 and the battery pack can be sealed.

[0063] 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 that is easy to assemble, characterized in that, include: A valve cover and a valve seat; a movable component is provided on the valve seat, and a connecting seat is provided on the valve cover, the movable component and the connecting seat are fixed; the connecting seat and the valve cover correspond to form a mounting groove, and an inner sealing ring is provided in the mounting groove; an exhaust gap is formed between the valve seat and the connecting seat, and when the movable component is in the initial state, the inner sealing ring closes the exhaust gap.

2. A battery pressure relief valve for ease of assembly according to claim 1, wherein, A connecting groove is provided on the valve cover, the connecting groove is connected to the mounting groove, and the connecting seat is disposed in the connecting groove.

3. The battery pressure relief valve for easy assembly according to claim 2, characterized in that, A first blocking ring is provided on the connecting seat, and a second blocking ring is provided on the valve cover and on the inner wall of the mounting groove; both the first blocking ring and the second blocking ring abut against the inner sealing ring.

4. The battery pressure relief valve for easy assembly according to claim 1, characterized in that, The valve seat is provided with a plurality of vent holes, which are arranged at radial intervals along the valve seat.

5. A battery pressure relief valve for easy assembly according to claim 4, characterized in that, The movable component includes a spring and a connecting rod; a connecting hole corresponding to and adapted to the connecting rod is provided on the valve seat, and the connecting rod passes through the connecting hole and is fixed to the connecting seat; the spring is sleeved on the connecting rod, one end of the spring abuts against the valve seat, and the other end abuts against the end of the connecting rod away from the connecting seat.

6. A battery pressure relief valve for easy assembly according to claim 5, characterized in that, The connecting rod includes a connecting sleeve and a fixing screw; the connecting sleeve is sleeved on the fixing screw and disposed in the connecting hole; the fixing screw is fixed to the connecting seat, the spring is sleeved on the connecting sleeve, and the other end of the spring abuts against the fixing screw.

7. A battery pressure relief valve for easy assembly according to claim 6, characterized in that, The fixing screw has a through hole, and the valve cover has a vent hole; the vent hole communicates with the through hole.

8. A battery pressure relief valve for easy assembly according to claim 7, characterized in that, A waterproof and breathable membrane is provided on the connector; the waterproof and breathable membrane covers the through hole.

9. A battery pressure relief valve for easy assembly according to claim 1, characterized in that, An outer sealing ring is provided on the side of the valve seat facing the battery pack.

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