Explosion-proof valve, battery pack and vehicle

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to an anti-explosion valve, a battery pack and a vehicle, the anti-explosion valve comprises a mounting base, an upper cover and a plugging piece, a shaft hole is formed in the mounting base, and a plurality of communicating ports are formed in the circumferential direction of the shaft hole; the positions of the communicating ports are used for being in one-to-one correspondence with the positions of a plurality of through holes in a battery pack box body, the upper cover comprises a cover plate and a connecting shaft vertically connected to the cover plate, and the connecting shaft penetrates through the plugging piece and is movably connected with the shaft hole in an inserted mode in the first direction; the plugging piece is detachably matched with a part of the communicating ports to plug the corresponding through holes, the cover plate is used for covering the communicating ports, and the first direction is the axial direction of the shaft hole. The utility model aims to provide an anti-explosion valve, a battery pack and a vehicle aiming at at least one technical problem in the background technology.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and more specifically, to an explosion-proof valve, a battery pack, and a vehicle. Background Art

[0002] At present, the design of a large number of explosion-proof valves for battery packs is based on the structure of the battery pack box and the position of the battery pack on the vehicle body to consider the placement position and exhaust direction of the explosion-proof valve. It is necessary to identify in advance the exhaust form, installation position of the explosion-proof valve, and the layout space of the battery pack on the vehicle. The explosion-proof valve design usually requires customized development according to different vehicle models and different battery packs. It belongs to a directional exhaust structure under a fixed structure and cannot change the exhaust direction according to the change of the position of the battery pack product, making the battery pack not universal. Summary of the Utility Model

[0003] The purpose of the present application is to provide an explosion-proof valve, a battery pack, and a vehicle for at least one technical problem in the background art.

[0004] To achieve the above purpose, the present application adopts the following technical solutions:

[0005] One aspect of the present application provides an explosion-proof valve, including a mounting base, an upper cover, and a plugging member. An axial hole is formed on the mounting base, and a plurality of communication ports are formed in the circumferential direction of the axial hole. The positions of the communication ports are arranged in one-to-one correspondence with the positions of a plurality of through holes on the battery pack box. The upper cover includes a cover plate and a connecting shaft vertically connected to the cover plate. The connecting shaft passes through the plugging member and is movably inserted into the axial hole in a first direction. The plugging member is detachably engaged with a partial number of the communication ports to block the corresponding through holes. The cover plate is used to cover each of the communication ports. The first direction is the axial direction of the axial hole.

[0006] Optionally, the plugging member includes a bushing coaxially arranged with the axial hole. The bushing is engaged with the axial hole, and the bushing is sleeved on the connecting shaft.

[0007] The beneficial effect of this technical solution is that in this way, radial positioning is carried out among the connecting shaft, the bushing, and the axial hole, so that during the use of the battery pack, it is not easy for the connecting shaft, the plugging member, and the axial hole to have a relatively large range of relative positions in the radial direction of the connecting shaft.

[0008] Optionally, the axial hole is a stepped hole. The larger-diameter part of the axial hole is arranged close to the cover plate. The larger-diameter part of the axial hole is in sliding fit with the bushing, and the smaller-diameter part of the axial hole is in sliding fit with the connecting shaft.

[0009] The beneficial effects of this technical solution are as follows: In this way, the plugging member can be positioned in the first direction through the inner step of the shaft hole and the cover plate, so that the plugging member is not likely to shake during the use of the battery pack, and the plugging member is not likely to move in the first direction under the action of air pressure. Moreover, the connecting shaft is guided by the shaft hole and the shaft sleeve together, which prolongs the length of the guiding path and makes the connecting shaft not easy to separate from the shaft hole and the shaft sleeve during the exhaust process.

[0010] Optionally, a first circumferential limiting portion is formed on the outer wall of the connecting shaft, and a second circumferential limiting portion is formed on the inner wall of the shaft sleeve. The first circumferential limiting portion and the second circumferential limiting portion are in sliding fit in the first direction.

[0011] The beneficial effects of this technical solution are as follows: This limits the relative position between the plugging member and the upper cover in the circumferential direction of the connecting shaft, making it not easy for the plugging member and the upper cover to rotate relative to each other.

[0012] Optionally, the first circumferential limiting portion protrudes from the outer wall of the connecting shaft, and the second circumferential limiting portion is a groove formed on the inner wall of the shaft sleeve.

[0013] The beneficial effects of this technical solution are as follows: Compared with forming a convex structure inside the shaft sleeve, it is more difficult to process a groove inside the shaft sleeve, and compared with machining a groove on the outer wall of the connecting shaft, it is easier to produce by directly forming the convex structure together with the connecting shaft.

[0014] Optionally, an axial limiting portion is further formed on the inner wall of the shaft sleeve. The axial limiting portion is located inside the second circumferential limiting portion, and in the first direction, the axial limiting portion is located at one end of the second circumferential limiting portion away from the cover plate.

[0015] The beneficial effects of this technical solution are as follows: The relative position between the plugging member and the upper cover in the first direction is limited through the cooperation between the axial limiting portion and the first circumferential limiting portion. Furthermore, it is not easy to cause the failure of the circumferential limit between the upper cover and the plugging member due to the separation of the first circumferential limiting portion and the second circumferential limiting portion in the first direction, and the plugging member is not easy to move in the first direction under the action of air pressure.

[0016] Optionally, the communication port is a fan-shaped port. The plugging member further includes a connecting rod and an exhaust partition tongue. The shaft sleeve is connected to the exhaust partition tongue through the connecting rod. The exhaust partition tongue is arc-shaped. The exhaust partition tongue is arranged in the communication port, and the outer wall of the exhaust partition tongue is attached to the arc-shaped inner wall of the communication port. In the circumferential direction of the connecting shaft, the length of the exhaust partition tongue corresponds to the length of the arc-shaped inner wall of the communication port.

[0017] The beneficial effects of this technical solution are as follows: In this way, it is convenient to select a suitable communication port to cooperate with the exhaust baffle by rotating the plugging member, and the inner wall of the communication port can also limit the exhaust baffle, so that when the battery pack is in use, the exhaust baffle is not likely to shake in the communication port.

[0018] Optionally, four of the communication ports are formed on the mounting base, and the central angle corresponding to each communication port is 90°. The plugging member includes two of the connecting rods and two of the exhaust baffles, and the two connecting rods are perpendicular to each other, and the two connecting rods are respectively connected to the two exhaust baffles in one-to-one correspondence.

[0019] The beneficial effects of this technical solution are as follows: That is to say, the explosion-proof valve provided by the embodiment of the present application can realize at least four ways of adjusting the exhaust position and direction, so as to achieve the purpose of realizing more adjustments of the exhaust position and direction with relatively few communication ports and exhaust baffles provided.

[0020] Optionally, the shaft hole is a blind hole, and a spring is fixed in the shaft hole, and the spring is fixedly connected to the connecting shaft.

[0021] The beneficial effects of this technical solution are as follows: Using a spring to connect the mounting base and the connecting shaft together, on the one hand, the air pressure generated by the discharged gas must overcome the elastic force of the spring and the weight of the upper cover to open the upper cover, and after the exhaust is completed, the upper cover can be reset under the action of the elastic force of the spring. On the other hand, the upper cover is not likely to fall out of the shaft hole under the action of air pressure.

[0022] Another aspect of the present application provides a battery pack, including a box body and the explosion-proof valve provided by the present application, and the explosion-proof valve is installed on the box body.

[0023] A third aspect of the present application provides a vehicle, including the battery pack provided by the present application.

[0024] The technical solution provided by the present application can achieve at least one of the following beneficial effects:

[0025] When the explosion-proof valve, battery pack, and vehicle provided by the present application are in use, the mounting base is fixed to the battery pack box body. The positions of the communication ports correspond one-to-one with the positions of multiple through holes on the battery pack box body. When the cover plate covers the communication ports, the gas in the battery pack must push open the cover plate to be discharged from the battery pack, enabling the connecting shaft and the shaft hole to be movably inserted in the first direction, making it possible for the gas in the battery pack to push up the cover plate. The through holes corresponding to the positions of the communication ports that cooperate with the plugging member among the communication ports are blocked by the plugging member and cannot discharge gas outward, while the through holes not blocked by the plugging member can discharge gas outward. When it is necessary to change the through holes for discharging gas and the through holes to be plugged according to the installation requirements of the battery pack, the upper cover is lifted, the plugging member is separated from the communication port for exhaust, and the plugging member is made to cooperate with the communication port to be plugged and block the corresponding through hole. Then, when the cover plate is restored to the position covering the communication ports, the operation of changing the exhaust position on the explosion-proof valve is completed. When the battery pack applying the explosion-proof valve provided by the present application needs to change the installation position, the position of the plugging member can be adjusted to select the communication port that cooperates with the plugging member, so as to select the through hole to be blocked and make the unblocked through hole become the exhaust hole, thereby realizing the change of the exhaust direction of the battery pack and ultimately achieving the purpose of improving the versatility of the battery pack.

[0026] The additional technical features and their advantages of the present application will be more clearly described in the following description content, or can be understood through the specific practice of the present application. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the specific embodiments of the present application, the drawings required for use in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 Schematic three-dimensional structure diagram of an embodiment of the explosion-proof valve provided by an embodiment of the present application;

[0029] Figure 2 Partial schematic three-dimensional structure diagram of an embodiment of the explosion-proof valve provided by an embodiment of the present application;

[0030] Figure 3 Schematic three-dimensional structure diagram of an embodiment of the mounting base provided by an embodiment of the present application;

[0031] Figure 4 Schematic three-dimensional structure diagram of an embodiment of the plugging member provided by an embodiment of the present application;

[0032] Figure 5 Schematic three-dimensional structure diagram of an embodiment of the upper cover provided by an embodiment of the present application;

[0033] Figure 6 It is a schematic cross-sectional structure diagram of an implementation manner of the explosion-proof valve provided by the embodiments of the present application.

[0034] Reference numerals:

[0035] 01. Upper cover; 02. Installation base;

[0036] 03. Bush; 04. Communication port;

[0037] 05. Connecting rod; 06. Annular gasket;

[0038] 07. Exhaust baffle; 08. Larger diameter part;

[0039] 09. Smaller diameter part; 10. Shaft hole;

[0040] 11. Axial limiting part; 12. Second circumferential limiting part;

[0041] 13. Sealing member; 14. Cover plate;

[0042] 15. Connecting shaft; 16. First circumferential limiting part. Detailed implementation manners

[0043] Next, the technical solutions of the present application will be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0044] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0046] As Figures 1 to 6 shown, one aspect of the present application provides an explosion-proof valve, which includes an installation base 02, an upper cover 01, and a plugging member 13. An axial hole 10 is formed on the installation base 02, and a plurality of communication ports 04 are formed in the circumferential direction of the axial hole 10. The positions of the communication ports 04 are arranged to correspond one-to-one with the positions of a plurality of through holes on the battery pack box body. The upper cover 01 includes a cover plate 14 and a connecting shaft 15 vertically connected to the cover plate 14. The connecting shaft 15 passes through the plugging member 13 and is movably inserted into the axial hole 10 in a first direction. The plugging member 13 is detachably engaged with a partial number of the communication ports 04 to plug the corresponding through holes. The cover plate 14 is used to cover each of the communication ports 04. The first direction is the axial direction of the axial hole 10.

[0047] It can be understood that the first direction is both the axial direction of the axial hole 10 and the circumferential direction of the connecting shaft 15; the detachable engagement between the plugging member 13 and a partial number of the communication ports 04 means that the number of the communication ports 04 engaged with the plugging member 13 is at least one less than the total number of all the communication ports 04. In the embodiments of the present application, the plurality mentioned refers to at least two; when the cover plate 14 covers each communication port 04, the gas discharged from the battery pack must reach a certain air pressure before the cover plate 14 can be pushed open.

[0048] When the explosion-proof valve provided by the present application is in use, the mounting base 02 is fixed to the battery pack box body. The positions of the communication ports 04 correspond one-to-one to the positions of a plurality of through holes on the battery pack box body. When the cover plate 14 covers the communication ports 04, the gas in the battery pack must push open the cover plate 14 to be discharged from the battery pack, enabling the connecting shaft 15 and the shaft hole 10 to be movably inserted in the first direction, making it possible for the gas in the battery pack to push up the cover plate 14. The through holes corresponding to the communication ports 04 that cooperate with the blocking member 13 among the communication ports 04 are blocked by the blocking member 13 and cannot discharge gas outward, while the through holes not blocked by the blocking member 13 can discharge gas outward. When it is necessary to change the through holes through which gas can be discharged and the through holes to be blocked according to the installation requirements of the battery pack, the upper cover 01 is lifted, the blocking member 13 is separated from the communication port 04 to be used for exhaust, and the blocking member 13 is made to cooperate with the communication port 04 to be blocked and block the corresponding through hole. Then, when the cover plate 14 is restored to the position covering the communication ports 04, the operation of changing the exhaust position on the explosion-proof valve is completed. When the battery pack applying the explosion-proof valve provided by the present application needs to change the installation position, the position of the blocking member 13 can be adjusted to select the communication port 04 that cooperates with the blocking member 13, so as to select the through holes to be blocked and make the unblocked through holes become exhaust holes, thereby realizing the change of the exhaust direction of the battery pack and ultimately achieving the purpose of improving the versatility of the battery pack.

[0049] Optionally, the blocking member 13 includes a shaft sleeve 03 coaxially arranged with the shaft hole 10. The shaft sleeve 03 cooperates with the shaft hole 10, and the shaft sleeve 03 is sleeved on the connecting shaft 15. In this way, through the radial positioning among the connecting shaft 15, the shaft sleeve 03, and the shaft hole 10, it is not easy for the relative positions of the connecting shaft 15, the blocking member 13, and the shaft hole 10 to have a large range in the radial direction of the connecting shaft 15 during the use of the battery pack. Of course, it is also possible to make the shaft sleeve 03 and the shaft hole 10 only contact in the first direction rather than cooperate.

[0050] Optionally, the shaft hole 10 is a stepped hole. The portion with a larger diameter of the shaft hole 10 is arranged close to the cover plate 14. The portion 08 with a larger diameter of the shaft hole 10 slidably cooperates with the shaft sleeve 03, and the portion 09 with a smaller diameter of the shaft hole 10 slidably cooperates with the connecting shaft 15. In this way, through the step inside the shaft hole 10 and the cover plate 14, the blocking member 13 can be positioned in the first direction, making it not easy for the blocking member 13 to shake during the use of the battery pack and not easy for the blocking member 13 to move in the first direction under the action of air pressure. Moreover, the connecting shaft 15 is guided by the shaft hole 10 and the shaft sleeve 03 together, extending the length of the guiding path, making it not easy for the connecting shaft 15 to separate from the shaft hole 10 and the shaft sleeve 03 during the exhaust process.

[0051] Optionally, a first circumferential limiting portion 16 is formed on the outer wall of the connecting shaft 15, and a second circumferential limiting portion 12 is formed on the inner wall of the bushing 03. The first circumferential limiting portion 16 and the second circumferential limiting portion 12 are in sliding fit in the first direction. This limits the relative position between the plugging member 13 and the upper cover 01 in the circumferential direction of the connecting shaft 15, making it difficult for relative rotation to occur between the plugging member 13 and the upper cover 01.

[0052] Optionally, the first circumferential limiting portion 16 protrudes from the outer wall of the connecting shaft 15, and the second circumferential limiting portion 12 is a groove formed on the inner wall of the bushing 03. Compared with forming a convex structure inside the bushing 03, it is easier to machine a groove inside the bushing 03, and compared with machining a groove on the outer wall of the connecting shaft 15, it is easier to directly form the convex structure together with the connecting shaft 15. Of course, the first circumferential limiting portion 16 can also be a groove, and the second circumferential limiting portion 12 can be a convex formed on the inner wall of the bushing 03. It can be understood that the number of the first circumferential limiting portions 16 and the number of the second circumferential limiting portions 12 can be the same so that each first circumferential limiting portion 16 and each second circumferential limiting portion 12 are in one-to-one correspondence, or the number of the first circumferential limiting portions 16 and the number of the second circumferential limiting portions 12 can be different.

[0053] Optionally, an axial limiting portion is further formed on the inner wall of the bushing 03. The axial limiting portion 11 is located inside the second circumferential limiting portion 12 and is at the end of the second circumferential limiting portion 12 away from the cover plate 14 in the first direction. The relative position between the plugging member 13 and the upper cover 01 in the first direction is limited by the cooperation between the axial limiting portion 11 and the first circumferential limiting portion 16, thereby making it difficult for the circumferential limiting of the upper cover 01 and the plugging member 13 to fail due to the separation of the first circumferential limiting portion 16 and the second circumferential limiting portion 12 in the first direction, and making it difficult for the plugging member 13 to move in the first direction under the action of air pressure. Of course, in the embodiment of the present application, preferably, both the above-mentioned solution of making the shaft hole 10 a stepped hole and the solution of forming an axial limiting portion 11 on the inner wall of the bushing 03 are adopted.

[0054] Optionally, the communication port 04 is a sector-shaped port. The plugging member 13 further includes a connecting rod 05 and an exhaust partition tongue 07. The sleeve 03 is connected to the exhaust partition tongue 07 through the connecting rod 05. The exhaust partition tongue 07 is arc-shaped. The exhaust partition tongue 07 is disposed in the communication port 04, and the outer wall of the exhaust partition tongue 07 fits the arc-shaped inner wall of the communication port 04. In the circumferential direction of the connecting shaft 15, the length of the exhaust partition tongue 07 corresponds to the length of the arc-shaped inner wall of the communication port 04. In this way, it is convenient to select a suitable communication port 04 to cooperate with the exhaust partition tongue 07 by rotating the plugging member 13, and the inner wall of the communication port 04 can also limit the exhaust partition tongue 07, so that when the battery pack is in use, the exhaust partition tongue 07 is not likely to shake in the communication port 04.

[0055] Optionally, four communication ports 04 are formed on the mounting base 02, and the central angle corresponding to each communication port 04 is 90°. The plugging member 13 includes two connecting rods 05 and two exhaust partition tongues 07. The two connecting rods 05 are perpendicular to each other, and the two connecting rods 05 are respectively connected to the two exhaust partition tongues 07. That is to say, the explosion-proof valve provided by the embodiment of the present application can realize at least four ways of adjusting the exhaust position and direction, so as to achieve the purpose of realizing more adjustments of the exhaust position and direction with relatively few communication ports 04 and exhaust partition tongues 07. Of course, the lengths of the two connecting rods 05 can also be the same.

[0056] Optionally, the shaft hole 10 is a blind hole, and a spring (not shown) is fixed in the shaft hole 10. The spring is fixedly connected to the connecting shaft 15. Using the spring to connect the mounting base 02 and the connecting shaft 15 together, on the one hand, the air pressure generated by the discharged gas must overcome the elastic force of the spring and the weight of the upper cover 01 to open the upper cover 01, and after the exhaust is completed, the upper cover 01 can be reset under the action of the elastic force of the spring. On the other hand, the upper cover 01 is not likely to fall out of the shaft hole 10 under the action of air pressure.

[0057] In the embodiment of the present application, the explosion-proof valve further includes an annular gasket 06 and a sealing ring. The annular gasket 06 is disposed between the mounting base 02 and the cover plate 14, and the sealing ring is installed at the bottom of the mounting base 02 for sealing the gap between the mounting base 02 and the box body of the battery pack.

[0058] Another aspect of the present application provides a battery pack, including a box body and the explosion-proof valve provided by the embodiment of the present application. The explosion-proof valve is installed on the box body.

[0059] The battery pack provided by the present application adopts the explosion-proof valve provided by the present application. During use, the mounting base 02 is fixed to the battery pack box body. The positions of the respective communication ports 04 are set in one-to-one correspondence with the positions of a plurality of through holes on the battery pack box body. When the cover plate 14 covers the respective communication ports 04, the gas inside the battery pack must push open the cover plate 14 to be discharged from the battery pack, enabling the connecting shaft 15 and the shaft hole 10 to be movably inserted in the first direction, making it possible for the gas inside the battery pack to push the cover plate 14 to the top. The through holes corresponding to the positions of the communication ports 04 that cooperate with the plugging member 13 among the respective communication ports 04 are blocked by the plugging member 13 and cannot discharge gas outward, while the through holes not blocked by the plugging member 13 can discharge gas outward. When it is necessary to change the through holes for discharging gas and the through holes to be plugged according to the installation requirements of the battery pack, the upper cover 01 is lifted, the plugging member 13 is separated from the communication port 04 to be used for exhaust, and the plugging member 13 is made to cooperate with the communication port 04 to be plugged and block the corresponding through hole. Then, when the cover plate 14 is restored to the position covering the respective communication ports 04, the operation of changing the exhaust position on the explosion-proof valve is completed; when the battery pack applying the explosion-proof valve provided by the present application needs to change the installation position, the position of the plugging member 13 can be adjusted to select the communication port 04 that cooperates with the plugging member 13, so as to select the through hole to be blocked and make the unblocked through hole become the exhaust hole, thereby achieving the change of the exhaust direction of the battery pack and ultimately achieving the purpose of improving the versatility of the battery pack.

[0060] The third aspect of the present application provides a vehicle, including the battery pack provided by the embodiments of the present application.

[0061] The vehicle provided by the present application uses the battery pack provided by the present application. During use, the mounting base 02 is fixed to the battery pack housing. The positions of the respective communication ports 04 are set in one-to-one correspondence with the positions of a plurality of through holes on the battery pack housing. When the cover plate 14 covers the respective communication ports 04, the gas inside the battery pack must push open the cover plate 14 to be discharged from the battery pack, enabling the connecting shaft 15 to be movably inserted into the shaft hole 10 in the first direction, making it possible for the gas inside the battery pack to push the cover plate 14 upwards. The through holes corresponding to the communication ports 04 that cooperate with the plugging member 13 among the respective communication ports 04 are blocked by the plugging member 13 and cannot discharge gas outwards, while the through holes not blocked by the plugging member 13 can discharge gas outwards. When it is necessary to change the through holes for discharging gas and the through holes to be plugged according to the installation requirements of the battery pack, the upper cover 01 is lifted, the plugging member 13 is separated from the communication port 04 for exhaust, and the plugging member 13 is made to cooperate with the communication port 04 to be plugged and block the corresponding through hole. After the cover plate 14 is restored to the position covering the respective communication ports 04, the operation of changing the exhaust position on the explosion-proof valve is completed. When the battery pack applying the explosion-proof valve provided by the present application needs to change the installation position, the position of the plugging member 13 can be adjusted to select the communication port 04 that cooperates with the plugging member 13, so as to select the through hole to be blocked and make the unblocked through hole become the exhaust hole, thereby realizing the change of the exhaust direction of the battery pack and ultimately achieving the purpose of improving the versatility of the battery pack.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Explosion-proof valve, characterized in that: It includes a mounting base, an upper cover and a sealing member, wherein an axial hole is formed on the mounting base, and a plurality of communication ports are formed in the circumferential direction of the axial hole, and the position of each of the communication ports is used to correspond to the position of a plurality of through holes on the battery pack body, the upper cover includes a cover plate and a connecting shaft vertically connected to the cover plate, the connecting shaft passes through the sealing member and is movably connected to the axial hole in a first direction, the sealing member and a part of the communication ports can be detachably matched to block the corresponding through holes, the cover plate is used to cover each of the communication ports, and the first direction is the axial direction of the axial hole.

2. The explosion-proof valve according to claim 1, characterized in that: The blocking member comprises a shaft sleeve coaxially arranged with the shaft hole, the shaft sleeve cooperates with the shaft hole, and the shaft sleeve is sleeved on the connecting shaft.

3. The explosion-proof valve according to claim 2, characterized in that: The shaft hole is a stepped hole, the larger diameter portion of the shaft hole is arranged close to the cover plate, the larger diameter portion of the shaft hole is slidably matched with the shaft sleeve, and the smaller diameter portion of the shaft hole is slidably matched with the connecting shaft.

4. The explosion-proof valve according to claim 2, characterized in that: A first circumferential limiting portion is formed on the outer wall of the connecting shaft, and a second circumferential limiting portion is formed on the inner wall of the sleeve. The first circumferential limiting portion and the second circumferential limiting portion are slidably matched in the first direction.

5. The explosion-proof valve according to claim 4, characterized in that: The first circumferential limiting portion protrudes from the outer wall of the connecting shaft, and the second circumferential limiting portion is a groove formed on the inner wall of the sleeve.

6. The explosion-proof valve according to claim 5, characterized in that: An axial limiting portion is also formed on the inner wall of the shaft sleeve. The axial limiting portion is located inside the second circumferential limiting portion. In the first direction, the axial limiting portion is located at an end of the second circumferential limiting portion away from the cover plate.

7. The explosion-proof valve according to any one of claims 2 to 6, characterized in that: The connecting port is a fan-shaped port, and the sealing member further comprises a connecting rod and an exhaust baffle tongue. The sleeve is connected to the exhaust baffle tongue via the connecting rod, and the exhaust baffle tongue is arc-shaped. The exhaust baffle tongue is arranged in the connecting port, and the outer wall of the exhaust baffle tongue is fitted with the arc-shaped inner wall of the connecting port. The length of the exhaust baffle tongue in the circumferential direction of the connecting shaft corresponds to the length of the arc-shaped inner wall of the connecting port.

8. The explosion-proof valve according to claim 7, characterized in that: Four connecting ports are formed on the mounting base, and the central angle corresponding to each connecting port is 90°. The blocking member includes two connecting rods and two exhaust baffles. The two connecting rods are perpendicular to each other, and the two connecting rods are connected to the two exhaust baffles in a one-to-one correspondence.

9. A battery pack, characterized in that: The invention comprises a box body and an explosion-proof valve according to any one of claims 1 to 8, wherein the explosion-proof valve is installed in the box body.

10. A vehicle, characterized in that Comprising the battery pack as claimed in claim 9.

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