One-way anti-explosion valve

Abstract

The utility model relates to a one-way anti-explosion valve, which relates to the technical field of anti-explosion valves, and comprises a valve cover, a valve body, a spring and a guide piece, the valve cover is arranged at the top of the valve body, a support piece is fixedly arranged in the valve body, the guide piece is hollow and is provided with an opening at the top, the top end of the guide piece penetrates through the valve body to be connected with the valve cover, and the spring is arranged in the guide piece. The guide part not only plays a role in guiding, but also plays a role in protecting the spring, the assembly process is simplified, the two ends of the spring abut against the bottom of the supporting part and the bottom of the guide part respectively, the valve deck is tightly attached to the top of the valve body under the action of the spring, and sealing is achieved through the inner sealing part between the valve deck and the valve body. And when the pressure in the battery pack is greater than a certain value, the valve cover leaves the top of the valve body to release pressure, and meanwhile, the valve cover drives the guide piece to move upwards to ensure the pressure release effect.

Description

Technical Field

[0001] This utility model relates to the technical field of explosion-proof valves, and in particular to a one-way explosion-proof valve. Background Technology

[0002] With the development of new energy vehicle technology and electrochemical energy storage technology, battery pack safety has become an increasingly important concern. When a battery pack experiences thermal runaway, the cells release a large amount of mixed gas, causing the internal pressure of the battery pack to rise sharply. If this pressure cannot be released in time, an explosion will occur, seriously affecting the safety of personnel. Therefore, it is necessary to install explosion-proof valves to release the internal pressure of the battery in a timely manner and reduce the risk of irreparable damage and loss during production.

[0003] Traditional one-way explosion-proof valves are installed on the battery pack housing, using a guide rod to connect the valve cover, with a spring fitted on the guide rod to provide elasticity. In this installation structure, the spring is exposed, posing a risk of impact and corrosion during transportation and use, affecting product quality and performance. Some products are designed with an additional protective cap on the outside of the guide rod and spring to protect the spring. Utility Model Content

[0004] In order to improve the defects of the one-way explosion-proof valve in the above-mentioned background art, the present invention provides a one-way explosion-proof valve.

[0005] The one-way explosion-proof valve provided by this utility model adopts the following technical solution:

[0006] A one-way explosion-proof valve includes a valve cover, a valve body, a spring, and a guide. The valve cover is disposed on the top of the valve body. A support is fixedly disposed inside the valve body, and a plurality of vent holes are formed between the support and the valve body. The guide is hollow inside and open at the top. The top end of the guide passes through the valve body and connects to the valve cover. The spring is disposed inside the guide, and the guide guides and protects the spring. The two ends of the spring abut against the support and the bottom of the guide, respectively.

[0007] Preferably, a sealing groove is provided at the top of the valve body, and an inner sealing element is provided in the sealing groove. The inner sealing element surrounds the top edge of the valve body and seals the valve cover and the valve body.

[0008] Preferably, the support member includes a support block and a connecting rod. The support block is located at the axial position inside the valve body and is connected to the valve body by the connecting rod.

[0009] Preferably, the guide member has a groove along its side wall, the connecting rod is engaged in the groove and slides along the groove, and the guide member is slidably engaged with the valve body.

[0010] Preferably, the support block has an arc-shaped periphery and is clearance-fitted with the inner surface of the guide member.

[0011] Preferably, the support block has a protrusion on the side that abuts against the spring, and the protrusion is positioned and engaged with the end of the spring to prevent the spring from being misaligned and unable to bear force.

[0012] Preferably, bolt holes are provided on the bottom periphery of the valve body, and the valve body is fixedly mounted on the battery pack housing by bolts to provide explosion-proof pressure relief inside the battery pack.

[0013] Preferably, an external seal is provided at the bottom of the valve body, and the external seal is disposed between the valve body and the battery pack housing.

[0014] In summary, this utility model has the following beneficial technical effects:

[0015] 1. This utility model provides a one-way explosion-proof valve structure for releasing the pressure inside a battery pack. After installation, the guide and the valve body slide together, and the top of the guide passes through the valve body to connect to the valve cover. Under the action of the spring, the valve cover is pressed against the top of the valve body, and the seal is achieved through the inner sealing element between the two. When the pressure inside the battery pack is greater than a certain value, the valve cover moves away from the top of the valve body to start releasing pressure. At the same time, the valve cover drives the guide to move upward, causing the spring to be further compressed to ensure the pressure relief effect.

[0016] 2. In this utility model, the spring is located inside the guide member. The guide member not only plays a guiding role, but also protects the spring. There is no need to install an additional protective cap to protect the spring, which saves parts, simplifies the assembly process, and reduces the risk of product failure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation structure of a one-way explosion-proof valve according to an embodiment of this utility model;

[0018] Figure 2 This is a side sectional view of a one-way explosion-proof valve according to an embodiment of the present utility model;

[0019] Figure 3 This is an exploded structural diagram of a one-way explosion-proof valve according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the valve body according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the guide component according to an embodiment of the present utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Valve cover; 2. Valve body; 3. Spring; 4. Guide; 5. Support; 6. Vent; 7. Support block; 8. Connecting rod; 9. Groove; 10. Protrusion; 11. Sealing groove; 12. Inner seal; 13. Bolt hole; 14. Outer seal. Detailed Implementation

[0023] The following combination Figures 1-5 The present invention will be described in further detail below.

[0024] This utility model discloses a one-way explosion-proof valve.

[0025] Reference Figure 1 , Figure 2 , Figure 3 A one-way explosion-proof valve includes a valve cover 1, a valve body 2, a spring 3, and a guide 4. The valve cover 1 is located on the top of the valve body 2. A support 5 is fixedly installed inside the valve body 2. Several vent holes 6 are formed between the support 5 and the valve body 2. The vent holes 6 connect the inside and outside. The guide 4 is hollow inside and open at the top. The top of the guide 4 passes through the valve body 2 and connects to the valve cover 1. The spring 3 is located inside the guide 4. The two ends of the spring 3 abut against the support 5 and the bottom of the guide 4, respectively.

[0026] Reference Figure 3 , Figure 4 The valve body 2 has a sealing groove 11 at the top, and an inner sealing element 12 is provided in the sealing groove 11. The inner sealing element 12 surrounds the top edge of the valve body 2 and seals the valve cover 1 and the valve body 2. The inner sealing element 12 uses an inner sealing ring.

[0027] Reference Figure 2 , Figure 4 The support component 5 includes a support block 7 and a connecting rod 8. The support block 7 is located at the axial position inside the valve body 2 and is connected to the valve body 2 by the connecting rod 8.

[0028] Reference Figure 1 , Figure 4 , Figure 5 The guide 4 has a groove 9 along its side wall. The connecting rod 8 is engaged in the groove 9 and slides along the groove 9. The guide 4 slides with the valve body 2. The support block 7 has an arc surface structure around its periphery and is in clearance fit with the inner surface of the guide 4.

[0029] Reference Figure 2 , Figure 4 The support block 7 has a protrusion 10 on one side of the spring 3. The protrusion 10 is positioned and engaged with the end of the spring 3 to prevent the spring 3 from being misaligned and unable to bear force.

[0030] Reference Figure 2 The valve body 2 has bolt holes 13 on its bottom periphery. The valve body 2 is fixed to the battery pack housing by bolts to provide explosion-proof pressure relief inside the battery pack. Alternatively, other structures such as locking pins can be provided on the bottom periphery of the valve body 2 to fix the valve body 2 to the battery pack housing.

[0031] Reference Figure 2The bottom of the valve body 2 is provided with an outer sealing element 14, and the outer sealing element 15 is provided between the valve body 2 and the battery pack housing and seals them. The outer sealing element 15 uses an outer sealing ring.

[0032] This invention can also be applied to other sealing components that require explosion-proof pressure relief.

[0033] The implementation principle of a one-way explosion-proof valve according to this utility model embodiment is as follows: The one-way explosion-proof valve is assembled, and the spring 3 is placed inside the guide member 4. The top end of the guide member 4 passes through the support member 5 inside the valve body 2 and extends out. At this time, the two ends of the spring 3 inside the guide member 4 abut against the support member 5 and the bottom of the guide member 4, respectively. The valve cover 1 is assembled on the top of the valve body 2 and sealed with the inner sealing member 12. The top end of the guide member 4 is connected to the valve body. The valve body 2 is fixed on the battery pack housing by bolts, and an outer sealing member 15 is provided between the valve body 2 and the battery pack housing for sealing.

[0034] Under sealing conditions, the guide 4 tends to move downward under the action of the spring 3, thereby causing the valve cover 1 to press tightly against the valve body 2, and achieving sealing through the inner sealing element 12 between the two.

[0035] Under pressure relief conditions, when the pressure inside the battery pack housing exceeds a certain value, the air pressure acting inside the valve cover 1 causes the valve cover 1 to move away from the valve body 2, and the inner seal 12 can no longer perform its sealing function, thus starting to relieve pressure. At the same time, the guide 4 moves upward under the action of the valve cover 1 and slides with the valve body 2, causing the spring 3 to be further compressed.

[0036] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A one-way explosion relief valve characterized by: Including valve cover (1), valve body (2), spring (3) and guide (4), the valve cover (1) is arranged on the top of the valve body (2), the support (5) is fixedly arranged in the valve body (2), and a plurality of exhaust holes (6) are formed between the support (5) and the valve body (2);The guide (4) is hollow and open at the top, the guide (4) top end passes through the valve body (2) and is connected with the valve cover (1), the spring (3) is arranged in the guide (4), and the both ends of the spring (3) are respectively abutted with the support (5) and the bottom of the guide (4).

2. A one-way pressure relief valve according to claim 1, characterized in that: The top end of the valve body (2) is provided with a sealing groove (11), and the sealing groove (11) is provided with an inner sealing element (12), the inner sealing element (12) surrounds the top edge of the valve body (2) and seals the valve cover (1) and the valve body (2).

3. A one-way pressure relief valve according to claim 1, wherein: The support (5) includes support block (7) and connecting rod (8), the support block (7) is arranged in the axial position of the valve body (2), and the support block (7) is connected with the valve body (2) through the connecting rod (8).

4. A one-way pressure relief valve according to claim 3, wherein: The guide (4) is provided with a groove (9) along the side wall, the connecting rod (8) is clamped in the groove (9) and slides along the groove (9), and the guide (4) is in sliding fit with the valve body (2).

5. A one-way pressure relief valve according to claim 3, wherein: The support block (7) is arc surface structure on the side, and is in clearance fit with the inner surface of the guide (4).

6. A one-way pressure relief valve according to claim 3, wherein: The support block (7) is provided with a protrusion (10) on the side abutting the spring (3), and the protrusion (10) is in positioning fit with the end of the spring (3).

7. A one-way pressure relief valve according to claim 1, wherein: The bottom of the valve body (2) is provided with a bolt hole (13), and the valve body (2) is fixedly arranged on the battery pack shell through the bolt.

8. A one-way pressure relief valve according to claim 7, characterized in that: The bottom of the valve body (2) is provided with an outer sealing element (14), and the outer sealing element (14) is arranged between the valve body (2) and the battery pack shell and is sealed.

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