Explosion-proof valve assembly, battery pack and vehicle

Abstract

An explosion-proof valve assembly, a battery pack and a vehicle, the explosion-proof valve assembly is used for being mounted on the outer wall surface of the battery pack, the outer wall surface is provided with a first through hole, and the explosion-proof valve assembly comprises: an auxiliary member which is attached to the outer wall surface to shield the first through hole and is provided with a second through hole communicated with the first through hole; and the main body piece abuts against the auxiliary piece to seal the second through hole, the main body piece is provided with a plurality of cantilever buckles, the multiple cantilever buckles are clamped to the auxiliary piece, and when the internal pressure of the outer wall face is larger than or equal to a preset value, the multiple cantilever buckles can elastically deform under the action of the internal pressure so as to be separated from the auxiliary piece. During installation, the auxiliary part is fixedly attached to the outer wall face, the main body part fixedly abuts against the auxiliary part through the cantilever buckle, the main body part and the outer side wall of the battery pack are not directly connected, only relevant parameters of the main body part need to be designed according to the size of the auxiliary part, explosion-proof valve design does not need to be independently carried out according to the side walls with different thicknesses, adaptability is high, and cost is low. The production cost is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of battery pack explosion-proof valve technology, specifically to an explosion-proof valve assembly, a battery pack, and a vehicle. Background Technology

[0002] An explosion-proof valve is a device that is triggered to rapidly release heat and pressure in the event of thermal runaway within a battery pack. Currently, the most common type of explosion-proof valve is the snap-on type. The main structure of a snap-on type explosion-proof valve includes a main body and a cantilevered snap-on mechanism connected to the main body. The side walls of the battery pack (including the outer walls of the side beams) are typically equipped with vent holes. The cantilevered snap-on mechanism extends into the battery pack (including into the inner cavity of the side beams) and snaps against the inner surface of the side wall, causing the main body to abut and fix against the outer surface of the side wall to close the vent holes. During a thermal runaway of the battery pack, the high-temperature gases released from the cells exert a thrust, deforming the snap-on mechanism and causing the entire explosion-proof valve to detach, opening the vent holes for rapid pressure release and venting. However, this snap-fit ​​connection method has strict requirements on the thickness of the battery pack sidewall. Specifically, its thickness must be the same as the distance between the end face of the main body that abuts against the battery pack sidewall and the right end face of the cantilever snap. This distance of the snap-fit ​​explosion-proof valve cannot be adjusted once designed. Therefore, when the battery pack thickness is too thin or too thick, the installation and use of the snap-fit ​​explosion-proof valve will result in sealing failure or installation failure. This limits the application range of the snap-fit ​​explosion-proof valve, that is, it can only be used with battery pack sidewalls of a single specified thickness. Utility Model Content

[0003] The purpose of this disclosure is to provide an explosion-proof valve assembly, a battery pack, and a vehicle to at least partially address the problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides an explosion-proof valve assembly for installation on the outer wall surface of a battery pack, the outer wall surface having a first through hole, the explosion-proof valve assembly comprising:

[0005] An auxiliary component, fixed to the outer wall surface to shield the first through hole, and the auxiliary component having a second through hole communicating with the first through hole; and

[0006] The main body abuts against the side of the auxiliary component opposite to the outer wall surface to seal the second through hole.

[0007] The main body has multiple cantilever buckles, which are respectively engaged with the auxiliary component. When the internal pressure of the battery pack is greater than or equal to a preset value, the multiple cantilever buckles can elastically deform under the internal pressure to disengage from the auxiliary component.

[0008] Optionally, the auxiliary component includes a mounting plate, the second through hole being located inside the first through hole, and the plurality of cantilever buckles passing through the second through hole and engaging with the surface of the mounting plate facing the outer wall.

[0009] Optionally, the main body includes a body, the end face of the body facing the auxiliary component is sealed against the side of the auxiliary component away from the outer wall surface, one end of the cantilever buckle is connected to the body, and the other end is locked to the auxiliary component.

[0010] Optionally, the main body further includes a plurality of guide posts, one end of which is connected to the main body and the other end extends into the second through hole and fits against the inner wall of the second through hole.

[0011] Optionally, the plurality of guide posts and the plurality of cantilever buckles are arranged at equal intervals along the circumference of the body, and there is one cantilever buckle between two adjacent guide posts.

[0012] Optionally, the body has a waterproof and breathable membrane for balancing the internal pressure of the battery pack, and a first protruding ring is formed on the side of the body opposite to the auxiliary member near the outer edge. The waterproof and breathable membrane is located inside the first protruding ring, and the body also includes a cover that is fastened to the first protruding ring.

[0013] Optionally, it also includes a seal placed between the main body and the auxiliary component.

[0014] Optionally, the sealing element is a sealing ring, and the end face of the main body facing the auxiliary element is provided with a mounting groove for accommodating the sealing ring.

[0015] Optionally, the outer wall surface is provided with a plurality of positioning holes, and the auxiliary component has a positioning post for extending into the corresponding positioning hole.

[0016] Optionally, a second protruding ring is formed on the side of the auxiliary component facing the outer wall surface. The second protruding ring is used to extend into the first through hole in a matching shape. The second through hole is located inside the second protruding ring.

[0017] Optionally, the cantilever buckle includes a cantilever portion and a head disposed at one end of the cantilever portion for locking the auxiliary component, the head having a mounting bevel.

[0018] When the internal pressure is greater than or equal to the preset value, the internal pressure can push the main body to pull the cantilever buckle until it is disengaged from the auxiliary component.

[0019] According to a second aspect of this disclosure, a battery pack is provided, including the explosion-proof valve assembly described above.

[0020] Optionally, a pallet side beam is included, the outer side of which serves as the outer wall surface.

[0021] Optionally, the pallet side beam is a hollow structural beam with multiple internal reinforcing ribs.

[0022] Optionally, the plurality of reinforcing ribs divide the interior of the tray side beam into a plurality of gas channels, and the reinforcing ribs have gas passages connecting two adjacent gas channels.

[0023] According to a third aspect of this disclosure, a vehicle is provided, including the battery pack described above.

[0024] The above technical solution involves attaching the auxiliary component to the outer wall of the battery pack and covering the first through hole. The auxiliary component also has a second through hole communicating with the first through hole, ensuring normal pressure relief and heat dissipation of the battery pack (high-temperature, high-pressure gas is discharged sequentially through the first and second through holes). During installation, the auxiliary component is first attached to the outer wall of the battery pack, and the main body is fixed against the auxiliary component using cantilever clips. The main body has no direct connection to the outer wall of the battery pack; therefore, only the relevant parameters of the main body need to be designed according to the dimensions of the auxiliary component. The two can form a matching standard component applicable to battery packs with outer walls of any thickness. There is no need for separate explosion-proof valve designs for side walls of different thicknesses; only the first through hole needs to be opened on the outer wall of the battery pack. This design offers strong adaptability and reduces production costs.

[0025] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is an exemplary assembly diagram of an explosion-proof valve assembly and the outer wall of a battery pack, as shown in this disclosure.

[0028] Figure 2 yes Figure 1 The diagram shown is an exploded view of the explosion-proof valve assembly and the outer wall of the battery pack before assembly.

[0029] Figure 3 yes Figure 1 The figure shows an assembly cross-sectional view of the explosion-proof valve assembly and the outer wall of the battery pack.

[0030] Figure 4 This is a partial schematic diagram of a pallet side beam exemplarily shown according to this disclosure.

[0031] Explanation of reference numerals in the attached figures

[0032] 101-First through hole; 102-Positioning hole; 2-Auxiliary component; 21-Mounting plate; 22-Positioning post; 23-Second convex ring; 201-Second through hole; 3-Main body component; 31-Cantilever buckle; 311-Cantilever part; 312-Head; 313-Mounting slope; 32-Body body; 33-Guide post; 34-Mounting groove; 35-First convex ring; 36-Cover body; 37-Waterproof and breathable membrane; 4-Sealing component; 5-Pattern side beam; 51-Outer side surface; 52-Reinforcing rib; 53-Gas passage; 54-Air passage. Detailed Implementation

[0033] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0034] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" may refer to the structure of the relevant components themselves or to their orientation when used together. For example, "outer" wall refers to the exposed wall of the battery pack itself; "inner" of the second through hole being located in the first through hole refers to the projection along the axial direction of the two through holes, with the second through hole located inside the first through hole and the first through hole fitted outside the second through hole; a first protruding ring is formed on the side of the body away from the auxiliary component near the "outer" edge, where "outer" edge refers to the edge of the outer contour; the tray side beam is constructed as a hollow structural beam with multiple reinforcing ribs "inner", where "inner" refers to the interior of the tray side beam's own cavity.

[0035] In this disclosure, the terms "first," "second," etc., are used to distinguish one element from another and do not indicate any order or importance. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] Reference Figures 1-3 This disclosure exemplarily illustrates an explosion-proof valve assembly for mounting on the outer wall of a battery pack. The outer wall can be the outer surface of the battery's top cover, chassis, tray side beam, etc., and this disclosure is not limited thereto. The outer wall has a first through hole 101, the diameter of which can be adaptively designed according to the size of the auxiliary component 2, so that the auxiliary component 2 can cover the first through hole 101. The explosion-proof valve assembly includes an auxiliary component 2 and a main body 3. The auxiliary component 2 is fixed to the outer wall to cover the first through hole 101, and the auxiliary component 2 has a second through hole 201 communicating with the first through hole 101. This communication can be staggered, or the larger outer diameter component can cover the smaller outer diameter component. The auxiliary component 2 can be... Figure 2The plate-like shape shown, or in some other embodiments, can also be constructed as a block. The outer contour of the auxiliary component 2 can be designed in any shape as needed, as long as it can cover the first through hole 101. Here, "covering" means that the outer contour of the auxiliary component 2 is larger than the first through hole 101, so that the auxiliary component 2 can completely cover the first through hole 101, that is, the first through hole 101 is sealed off when there is no second through hole 201. The main body 3 abuts against the side of the auxiliary component 2 away from the outer wall to seal the second through hole 201. The main body 3 has multiple cantilever buckles 31, which are respectively locked onto the auxiliary component 2. When the internal pressure of the battery pack is greater than or equal to a preset value, the multiple cantilever buckles 31 can elastically deform under the internal pressure to disengage from the auxiliary component 2.

[0037] In the embodiments of this disclosure, the cantilever buckle 31 refers to a buckle with a cantilever, and the number of cantilever buckles 31 can be 3, 4, etc. The structure of the cantilever buckle 31 will be described in detail below. The cantilever buckle 31 can be locked at any position of the auxiliary component 2. The locking position can be adaptively designed according to actual needs, as long as it can fix the main component 3 to the auxiliary component 2 when the internal pressure of the battery pack is less than a preset value, and disengage from the auxiliary component 2 when the internal pressure is greater than or equal to the preset value. When the outer wall surface is a top cover or a chassis, the internal pressure can directly act on the explosion-proof valve assembly; when the outer wall surface is the outer side of the tray side beam, the internal pressure can act on the explosion-proof valve assembly through the inner cavity of the tray side beam itself. In this case, the interior of the battery pack needs to be in communication with the inner cavity of the tray side beam.

[0038] In the embodiments of this disclosure, the auxiliary component 2 can be fixed to the outer side wall by welding, bonding, or other methods. The auxiliary component 2 can be made of metal, such as steel, aluminum, and their alloys.

[0039] By using the above technical solution, the auxiliary component 2 is fixed to the outer wall of the battery pack and covers the first through hole 101. The auxiliary component 2 has a second through hole 201 that communicates with the first through hole 101, thereby ensuring the normal pressure relief and heat dissipation of the battery pack (high-temperature and high-pressure gas is discharged sequentially through the first through hole 101 and the second through hole 201). During installation, the auxiliary component 2 is first fixed to the outer wall of the battery pack, and the main body 3 is fixed against the auxiliary component 2 by the cantilever buckle 31. The main body 3 has no direct connection with the outer wall of the battery pack. Therefore, it is only necessary to design the relevant parameters of the main body 3 according to the size of the auxiliary component 2. The two can form a matching standard part to be applied to battery packs with outer wall surfaces of any thickness. There is no need to design explosion-proof valves separately for side walls of different thicknesses. It is only necessary to open the first through hole 101 on the outer wall of the battery pack. It has strong adaptability and reduces production costs.

[0040] Reference Figures 1-3In embodiments of this disclosure, the auxiliary component 2 may include a mounting plate 21, and the second through hole 201 may be located inside the first through hole 101 (concentrically or eccentrically). Multiple cantilever latches 31 may pass through the second through hole 201 and engage with the outer wall surface of the mounting plate 21. Designing the auxiliary component 2 as a plate and engaging the cantilever latches 31 with the outer wall surface of the mounting plate 21 can reduce the space occupied by the explosion-proof valve assembly on the outer wall surface of the battery pack. In other embodiments, the second through hole 201 may be constructed as a stepped hole, and the cantilever latches 31 may engage with the stepped surface of the stepped hole. In this case, the mounting plate 21 needs to have a certain thickness to facilitate the formation of the stepped surface for engagement.

[0041] This disclosure does not limit the specific structure of the main body 3. For example, in an embodiment of this disclosure, the main body 3 may include a body 32, with the end face of the body 32 facing the auxiliary component 2 sealingly abutting against the side of the auxiliary component 2 facing away from the outer wall surface. The contact position where the body 32 and the auxiliary component 2 sealingly abut against each other surrounds the second through hole 201 to form a sealing fit. One end of the cantilever buckle 31 is connected to the body 32, and the other end is secured to the auxiliary component 2. In an embodiment of this disclosure, the body 32 and the cantilever buckle 31 may be integrally formed or assembled as a whole. This disclosure does not limit the structure of the body 32; it may be... Figure 3 The diagram shows a flat cylindrical structure with one end open. Alternatively, in some other embodiments, it can be constructed directly as a flat plate.

[0042] Reference Figure 3 The explosion-proof valve assembly may also include a sealing element 4 placed between the main body 3 and the auxiliary component 2. By providing the sealing element 4, a sealing relationship between the main body 3 and the auxiliary component 2 can be ensured, preventing gas leakage. Specifically, in Figure 3 In one embodiment, the seal 4 may surround the second through hole 201 and be placed between the body 32 and the auxiliary component 2.

[0043] This disclosure does not limit the specific type of seal 4, for example in Figure 3 In the illustrated embodiment, the sealing element 4 can be a sealing ring, and the end face of the main body 3 facing the auxiliary element 2 can be provided with a mounting groove 34 for accommodating the sealing ring. When the main body 3 abuts against the auxiliary element 2, the sealing ring can be compressed to form a sealing effect.

[0044] Reference Figure 3In the embodiments of this disclosure, the main body 3 may further include multiple guide posts 33. One end of each guide post 33 may be connected to the main body 32, and the other end may extend into the second through hole 201 and fit against the inner wall of the second through hole 201. The guide posts 33 may be integrally formed with the main body 32, or they may be assembled onto the main body 32. The number of guide posts 33 may be 3, 4, etc. By setting the guide posts 33, they can play a guiding role when the main body 3 is installed onto the auxiliary part 2, and they can also play a good restricting role after installation, so that the main body 3 can only be withdrawn along the installation direction and separated from the auxiliary part 2, thereby cooperating with the cantilever buckle 31 to stably fix the main body 3 onto the auxiliary part 2.

[0045] When the main body 3 includes guide posts 33 and cantilever buckles 31, multiple guide posts 33 and multiple cantilever buckles 31 can be arranged equidistantly along the circumference of the main body 32, and there can be a cantilever buckle 31 between two adjacent guide posts 33. This design ensures that the locking and guiding forces at each position are uniform when the main body 3 is locked onto the auxiliary part 2, thereby improving the stability of the installation.

[0046] In embodiments of this disclosure, the body 32 may have a waterproof and breathable membrane 37 for balancing the internal pressure of the battery pack. A first protruding ring 35 may be formed near the outer edge of the side of the body 32 facing away from the auxiliary member 2. The waterproof and breathable membrane 37 may be located inside the first protruding ring 35. The body 32 may also include a cover 36 that is fastened to the first protruding ring 35. By providing the cover 36, the waterproof and breathable membrane 37 can be protected, and there is an air gap at the connection point between the cover 36 and the first protruding ring 35, so that the waterproof and breathable membrane 37 can be used normally.

[0047] Reference Figure 2 In the embodiments of this disclosure, the outer wall surface may be provided with a plurality of positioning holes 102, and the auxiliary component 2 may have positioning posts 22 for extending into the corresponding positioning holes 102. The positioning holes 102 and the positioning posts 22 cooperate to position the auxiliary component 2 during installation and prevent the auxiliary component 2 from rotating relative to the outer wall surface. The number of positioning posts 22 may be two, three, etc.

[0048] Reference Figure 2 In the embodiments disclosed herein, a second protruding ring 23 may be formed on the side of the auxiliary component 2 facing the outer wall surface. The second protruding ring 23 can be used to extend into the first through hole 101 in a matching shape, and the second through hole 201 can be located inside the second protruding ring 23. By designing the second protruding ring 23, on the one hand, it can play an assembly positioning role and protect the cantilever buckle 31, preventing the cantilever buckle 31 from being damaged or broken by external forces; on the other hand, the second protruding ring 23 can prevent high-temperature flue gas particles from rushing into the explosion-proof valve assembly during thermal runaway, which could lead to blockage of the airflow channel and prevent the explosion-proof valve assembly from falling off smoothly.

[0049] This disclosure does not limit the structure of the cantilever buckle 31; see reference. Figure 3 In the embodiments of this disclosure, the cantilever buckle 31 may include a cantilever portion 311 and a head 312 disposed at one end of the cantilever portion 311 for locking the auxiliary member 2. The head 312 may have an mounting slope 313. When the internal pressure is greater than or equal to a preset value, the internal pressure can push the main body 3 to pull the cantilever buckle 31 until it disengages from the auxiliary member 2. Specifically, the internal pressure can act on the end face of the main body 3 facing the auxiliary member 2, causing the main body 3 to tend to move away from the auxiliary member 2, thereby pulling the cantilever buckle 31. This causes the cantilever portion 311 to undergo radially inward elastic deformation, driving the head 312 to disengage from the auxiliary member 2. Even if the "locking" fails, the main body 3 can be ejected as a whole and detached from the auxiliary member 2, thereby achieving exhaust and pressure relief. The elastic deformation of the cantilever portion 311 can be achieved by its own beam segment structure or by its material. During installation, when the cantilever buckle 31 passes through the second through hole 201 from the outside, the mounting slope 313, under the squeezing action of the inner wall of the second through hole 201, causes the cantilever part 311 to deform elastically in the radial direction, so that it can smoothly extend into the second through hole 201. When the head 312 passes through the second through hole 201, the cantilever part 311 elastically resets to drive the head 312 to move outward in the radial direction and is locked by the end face on the surface of the auxiliary part 2 facing the outer wall. In order to achieve the installation effect, the mounting slope 313 can be radially outward and axially away from the body 32.

[0050] According to a second aspect of this disclosure, a battery pack is provided, including the aforementioned explosion-proof valve assembly. Since the battery pack has all the beneficial effects of the aforementioned explosion-proof valve assembly, further details are omitted here.

[0051] Reference Figures 1-3 In embodiments of this disclosure, the battery pack may include a tray side beam 5, and the outer side surface 51 of the tray side beam 5 may be used as the aforementioned outer wall surface.

[0052] Reference Figure 3 and Figure 4 In the embodiments of this disclosure, the pallet side beam 5 can be a hollow structural beam with multiple reinforcing ribs 52 inside. The reinforcing ribs 52 can be arranged according to strength requirements to prevent the hollow structural beam from being deformed by compression. The number of reinforcing ribs 52 can be two, three, etc.

[0053] Reference Figure 4In the embodiments of this disclosure, multiple reinforcing ribs 52 can divide the interior of the pallet side beam 5 into multiple gas channels 53. Each reinforcing rib 52 has an air passage 54 connecting two adjacent gas channels 53. By providing the air passage 54, adjacent gas channels 53 can be connected, allowing the high-temperature, high-pressure gas inside the pallet side beam 5 to flow rapidly to the first through hole 101. Specifically... Figure 4 In the illustrated embodiment, the gas passage 54 can be located at the position of the first through hole 101, which can be formed by breaking the reinforcing rib 52. Besides serving to connect adjacent gas passages 53, this broken position can also be used to avoid interference with the explosion-proof valve assembly during installation. Furthermore, the position of the reinforcing rib 52 relative to the positioning hole 102 can also be broken to avoid installation interference with the positioning post 22, and the broken position can also enhance internal gas flow.

[0054] According to a third aspect of this disclosure, a vehicle is provided that includes the aforementioned battery pack, the advantages of which will not be elaborated here.

[0055] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0057] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An explosion-proof valve assembly for installation on the outer wall of a battery pack, characterized in that, The outer wall surface has a first through hole, and the explosion-proof valve assembly includes: An auxiliary component, fixed to the outer wall surface to shield the first through hole, and the auxiliary component having a second through hole communicating with the first through hole; and The main body abuts against the side of the auxiliary component opposite to the outer wall surface to seal the second through hole. The main body has multiple cantilever buckles, which are respectively engaged with the auxiliary component. When the internal pressure of the battery pack is greater than or equal to a preset value, the multiple cantilever buckles can elastically deform under the internal pressure to disengage from the auxiliary component.

2. The explosion-proof valve assembly according to claim 1, characterized in that, The auxiliary component includes a mounting plate, the second through hole is located inside the first through hole, and the plurality of cantilever buckles pass through the second through hole and are engaged with the surface of the mounting plate facing the outer wall.

3. The explosion-proof valve assembly according to claim 1, characterized in that, The main body includes a body, the end face of the body facing the auxiliary component is sealed against the side of the auxiliary component away from the outer wall surface, and one end of the cantilever buckle is connected to the body and the other end is locked to the auxiliary component.

4. The explosion-proof valve assembly according to claim 3, characterized in that, The main body also includes a plurality of guide posts, one end of which is connected to the main body and the other end extends into the second through hole and fits against the inner wall of the second through hole.

5. The explosion-proof valve assembly according to claim 4, characterized in that, The plurality of guide posts and the plurality of cantilever buckles are arranged at equal intervals along the circumference of the body, and there is a cantilever buckle between two adjacent guide posts.

6. The explosion-proof valve assembly according to claim 3, characterized in that, The body has a waterproof and breathable membrane for balancing the internal pressure of the battery pack. A first protruding ring is formed on the side of the body away from the auxiliary member near the outer edge. The waterproof and breathable membrane is located inside the first protruding ring. The body also includes a cover that is fastened to the first protruding ring.

7. The explosion-proof valve assembly according to claim 1, characterized in that, It also includes a seal placed between the main body and the auxiliary component.

8. The explosion-proof valve assembly according to claim 7, characterized in that, The sealing element is a sealing ring, and the end face of the main body facing the auxiliary component is provided with a mounting groove for accommodating the sealing ring.

9. The explosion-proof valve assembly according to claim 1, characterized in that, The outer wall surface is provided with a plurality of positioning holes, and the auxiliary component has a positioning post for extending into the corresponding positioning hole.

10. The explosion-proof valve assembly according to claim 1, characterized in that, The auxiliary component has a second protruding ring formed on the side facing the outer wall surface. The second protruding ring is used to extend into the first through hole in a matching shape. The second through hole is located inside the second protruding ring.

11. The explosion-proof valve assembly according to any one of claims 1-10, characterized in that, The cantilever buckle includes a cantilever portion and a head disposed at one end of the cantilever portion for locking the auxiliary component. The head has a mounting bevel. When the internal pressure is greater than or equal to the preset value, the internal pressure can push the main body to pull the cantilever buckle until it is disengaged from the auxiliary component.

12. A battery pack, characterized in that, Includes the explosion-proof valve assembly according to any one of claims 1-11.

13. The battery pack according to claim 12, characterized in that, It includes a pallet side beam, the outer side of which serves as the outer wall surface.

14. The battery pack according to claim 13, characterized in that, The pallet side beam is a hollow structural beam with multiple internal reinforcing ribs.

15. The battery pack according to claim 14, characterized in that, The multiple reinforcing ribs divide the interior of the tray side beam into multiple gas channels, and the reinforcing ribs have gas passages that connect two adjacent gas channels.

16. A vehicle, characterized in that, The battery pack includes any one of claims 12-15.

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