CN220249045U - Explosion-proof relief valve and battery package - Google Patents

Abstract

The utility model belongs to the technical field of battery packs, and discloses a novel explosion-proof pressure release valve and a battery pack, wherein the novel explosion-proof pressure release valve comprises a sealing movable part, a valve body and an elastic opening and closing assembly, the valve body is provided with a pressure release hole, the sealing movable part is covered at the outer end of the pressure release hole, and the elastic opening and closing assembly is connected with the sealing movable part; the explosion-proof pressure release valve further comprises a valve body sealing piece, the valve body sealing piece is of an annular structure and is arranged between the sealing movable piece and the valve body in a tensioning mode, a radial protruding portion is arranged on the inner side of the valve body sealing piece, and a second mounting groove for the radial protruding portion to be embedded is formed in the upper end of the valve body. The radial bellied design in valve body sealing member inboard can improve the sealing performance of explosion-proof relief valve, can improve the stability of valve body sealing member's equipment simultaneously and make it be difficult for droing, uses the battery package structure of this novel explosion-proof relief valve more stable, and the security performance is better.

Description

Explosion-proof relief valve and battery package

Technical Field

The utility model relates to the technical field of battery packs, in particular to an explosion-proof pressure release valve and a battery pack.

Background

Along with the popularization of new energy automobiles, higher requirements are also placed on the reliability of the battery packs of the new energy automobiles. The explosion-proof pressure release valve is applied to a battery pack of a new energy automobile, when the battery pack works normally, the temperature inside the battery pack rises along with the battery pack due to heat generated by the working of the battery core, so that the internal pressure of the battery pack is higher than the external environment pressure, and at the moment, the waterproof breathable film on the explosion-proof pressure release valve can ventilate to dredge the internal pressure and adjust the internal and external pressure difference between the inside of the battery pack and the external environment; when the electric core in the battery pack is out of control, the electric core in the battery pack generates a large amount of gas, the pressure is rapidly increased, the gas is rapidly required to be rapidly discharged, the explosion-proof pressure release valve plays a role at the moment, when the internal pressure is increased to a certain degree, the secondary pressure release function of the explosion-proof pressure release valve is opened, a large amount of gas can be rapidly discharged, the internal pressure of the battery pack is reduced, dangerous accidents such as explosion of the battery pack are avoided, and the safety trip of people is guaranteed.

Most of the existing explosion-proof pressure release valves adopt O-shaped sealing rings, annular rubber flat gaskets or simple annular special-shaped sealing rings, the traditional O-shaped sealing rings and contact surfaces are not tightly pressed, the sealing performance is poor, water is easy to enter, and the dustproof performance is poor; meanwhile, the traditional sealing element is easy to fall off when used in the existing explosion-proof pressure release valve structure due to the fact that the traditional sealing element is simple in structure and insufficient in assembly stability, so that sealing failure is caused; and traditional sealing member is applicable to radial seal, when being used for axial seal, needs to exert great pressure again and make it produce deformation and can reach sealed effect, leads to the security stability of battery package not enough. Therefore, there is a need for an explosion-proof pressure relief valve and a battery pack to solve the above-mentioned technical problems.

Disclosure of Invention

One object of the present utility model is to:

1. the radial protruding part is arranged on the inner side of the valve body sealing piece and matched with the second mounting groove on the valve body, so that the assembly stability of the valve body sealing piece is improved, the valve body sealing piece is not easy to fall off, the axial sealing effect is achieved, and the sealing performance of the explosion-proof pressure release valve is improved;

2. the battery pack comprises the explosion-proof pressure release valve, so that the tightness of the battery pack is improved, and the safety and stability of the battery pack are ensured.

To achieve the purpose, the utility model adopts the following technical scheme:

in a first aspect, an explosion-proof pressure relief valve is provided, which comprises a sealing movable part, a valve body and an elastic opening and closing assembly, wherein the valve body is provided with a pressure relief hole, the sealing movable part is covered at the outer end of the pressure relief hole, and the elastic opening and closing assembly is connected with the sealing movable part; the explosion-proof relief valve still includes valve body sealing member, valve body sealing member set up to annular structure and rise tightly set up in seal movable part with between the valve body, the inboard of valve body sealing member is equipped with radial bellying, the first end of valve body is equipped with the installation department, the installation department periphery is equipped with the confession radial bellying embedded second mounting groove.

Preferably, one end of the sealing movable part, which is close to the valve body, is provided with a sealing groove, the valve body sealing part comprises a first abutting surface, a second abutting surface and a third abutting surface, the first abutting surface abuts against the bottom surface of the sealing groove or the lower surface of the sealing movable part, the second abutting surface abuts against the inner side surface of the sealing groove, the second abutting surface and the side surface of the sealing groove are both in conical surface structures, the valve body further comprises a bearing part arranged below the valve body sealing part, and the third abutting surface abuts against the bearing part.

Preferably, the receiving portion is an upper surface of the valve body.

Preferably, the cross sections of the second mounting groove and the radial protruding portion are rectangular, triangular, circular, elliptical or polygonal.

Preferably, the radial projection is in transition engagement with the second mounting groove.

Preferably, the valve further comprises a spring sheath, the elastic opening and closing assembly comprises a spring and an opening and closing guide rod, the spring sheath is connected with the valve body, the opening and closing guide rod is arranged in the spring sheath and penetrates through the valve body, the top of the opening and closing guide rod is connected with the sealing movable piece, the spring is sleeved on the opening and closing guide rod, two ends of the spring are respectively abutted to the valve body and the bottom of the opening and closing guide rod, and the spring has a trend of pushing the opening and closing guide rod to move.

Preferably, the explosion-proof pressure release valve further comprises a magnet piece, the magnet piece is embedded in the sealing movable piece, a magnet mounting groove for embedding the magnet piece is formed in the bottom surface of the sealing groove, the magnet piece is embedded in the magnet mounting groove, and the magnet piece is fixedly connected with the magnet mounting groove.

In a second aspect, a battery pack is provided, including the explosion-proof pressure relief valve described above.

Preferably, the second end of the valve body is provided with a first mounting groove, the explosion-proof pressure release valve further comprises a battery pack sealing element, and the battery pack sealing element is mounted in the first mounting groove and used for sealing a gap between the explosion-proof pressure release valve and a battery pack.

Preferably, the battery pack seal is interference fit with the first mounting groove.

The utility model has the beneficial effects that:

according to the explosion-proof pressure relief valve with better sealing performance and the sealing element not easy to fall off, the valve body sealing element seals a gap between the valve body and the sealing movable element, the valve body sealing element is in an annular design, the inner side of the valve body sealing element is provided with the radial protruding part, and the radial protruding part is matched with the second mounting groove on the valve body, so that the axial and radial positions of the valve body sealing element are maintained, the valve body sealing element is prevented from deflecting up and down, and the valve body sealing element is not easy to fall off. In addition, the valve body sealing piece is arranged between the sealing movable piece and the valve body in a tensioning mode, the effect of full sealing is achieved, and the sealing performance of the explosion-proof pressure relief valve is improved. On the other hand provides a battery package, including above-mentioned explosion-proof relief valve, through the high leakproofness that this explosion-proof relief valve provided, guarantee the safety and stability of battery package.

Drawings

The utility model is described in further detail below with reference to the drawings and examples;

FIG. 1 is an exploded view of an explosion proof pressure relief valve according to an embodiment;

FIG. 2 is a cross-sectional view of an explosion-proof pressure relief valve according to one embodiment;

FIG. 3 is a cross-sectional view of a valve body seal according to one embodiment;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is an exploded view of an explosion-proof pressure relief valve according to the second embodiment;

fig. 6 is a cross-sectional view of an explosion-proof pressure relief valve according to the second embodiment;

FIG. 7 is a cross-sectional view of a valve body seal according to embodiment two;

fig. 8 is an enlarged view of part B of fig. 7.

In the figure:

1. sealing the movable piece; 2. a magnet sheet; 3. a valve body seal; 4. a valve body; 5. a battery pack sealing member; 6. a spring; 7. opening and closing a guide rod; 8. a spring sheath;

11. sealing grooves;

31. a radial protrusion; 32 a first abutment surface; 33. a second abutment surface; 34 a third abutment surface;

41. a first mounting groove; 42. a second mounting groove; 43. and the pressure relief hole.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the operation, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Embodiment one:

the utility model provides a battery pack, which comprises a body and a novel explosion-proof pressure release valve arranged on the body, wherein the explosion-proof pressure release valve is used for adjusting the internal and external pressure difference between the inside of the battery pack and the external environment. As shown in fig. 1 to 4, the novel explosion-proof pressure release valve specifically comprises a sealing movable piece 1, a magnet piece 2, a valve body sealing piece 3, a valve body 4, a battery pack sealing piece 5 and an elastic opening and closing assembly.

As shown in fig. 2, the valve body 4 is provided with a pressure release hole 43, the sealing movable piece 1 is covered with the outer end of the pressure release hole 43, before the explosion-proof pressure release valve is opened for secondary pressure release, axial sealing is provided for the explosion-proof pressure release valve, dust, sediment and water are prevented from entering the explosion-proof pressure release valve, normal operation of the explosion-proof pressure release valve is prevented from being influenced, in the embodiment, the movable sealing piece 1 adopts a cover-type structure, the upper end of the movable sealing piece is provided with a plane, the lower end of the movable sealing piece is provided with a sealing groove 11, the bottom surface of the sealing groove 11 is provided with a magnetic mounting groove for embedding a magnetic sheet 2, the magnetic sheet 2 is fixedly connected with the movable sealing piece 1 in a viscose mode, or the magnetic sheet 2 is in interference fit with the magnetic mounting groove so that the magnetic sheet 2 is fixed in the magnetic mounting groove; at least part of the magnet piece 2 is abutted with the elastic opening and closing component. When the explosion-proof pressure release valve detects the gas tightness, the gas tightness detection clamp is arranged at the top of the movable sealing piece 1, a magnet is arranged in the gas tightness detection clamp, a magnet piece can attract the magnet in the gas tightness detection clamp to attract the movable sealing piece 1, at the moment, the pressure release hole 43 is opened, external air rapidly enters the inner end of the explosion-proof pressure release valve through the pressure release hole, and in this way, the gas tightness detection time of the explosion-proof pressure release valve can be reduced, and the detection efficiency is improved.

In order to enable the movable seal 1 to be tightly fixed at the outer end of the pressure relief hole 43 of the valve body 4, the explosion-proof pressure relief valve further comprises an elastic opening and closing assembly, the elastic opening and closing assembly comprises a spring 6, an opening and closing guide rod 7 and a spring jacket 8, a through hole is formed in the center of the valve body 4, the through hole is in clearance fit with the body of the opening and closing guide rod 7, the opening and closing guide rod 7 is movably connected with the valve body 4, the opening and closing guide rod 7 is in axial sliding fit with the valve body 4, the upper end of the opening and closing guide rod 7 penetrates through the through hole to be connected with the movable seal 1, specifically, the upper end of the opening and closing guide rod 7 is fixedly connected with the movable seal 1, in the embodiment, a convex external thread is arranged at the lower end of the movable seal 1, an internal thread hole matched with the opening and closing guide rod 7 is fixedly connected with the movable seal 1 through a thread structure; the spring 6 is sleeved on the opening and closing guide rod 7, a first clamping boss is arranged at the lower end of the central through hole of the valve body 4, the outer diameter of the first clamping boss is consistent with the inner diameter of the spring 6, meanwhile, a second clamping boss is arranged at the lower end of the opening and closing guide rod 7, a spring bearing part is further arranged at the lower end of the central through hole of the valve body 4 and the lower end of the opening and closing guide rod 7, two ends of the spring 6 respectively penetrate through the first clamping boss and the second clamping boss to be abutted against the first spring bearing part of the valve body 4 and the second spring bearing part at the lower end of the opening and closing guide rod 7, and the spring 6 has a trend of pushing the opening and closing guide rod 7 to move downwards so as to provide a force downwards pressed with the valve body 4 for the movable sealing piece 1; the spring sheath 8 is connected with the valve body 4, the opening and closing guide rod 7 is arranged in the spring sheath 8, and the spring sheath 8 plays a role in protecting the spring 6 from dust and water.

As shown in fig. 1 to 4, the valve body seal 3 is disposed between the seal movable member 1 and the valve body 4, for sealing a gap between the valve body 4 and the seal movable member 1, specifically, the valve body seal 3 is disposed in a ring-shaped structure and is disposed on the valve body 4 in a tensioning manner, further specifically, a radial protrusion 31 is disposed on an inner side of the valve body seal 3, a protruding mounting portion is disposed on an end of the valve body 4 near the movable seal 1, a second mounting groove 42 into which the radial protrusion 31 is inserted is disposed on an outer periphery of the mounting portion, the shape and size of the inner protrusion 31 is matched with the shape and size of the second mounting groove 42, and a cross section of the inner protrusion 31 may be set in a rectangular structure, a triangular structure, a trapezoid structure, a circular structure, an elliptical structure or a polygonal structure, and in this embodiment, a cross section of the inner protrusion 31 is set in a triangular structure. After the valve body sealing member 3 is arranged on the valve body 4 in a tensioning mode, the radial protruding portion 31 is embedded into the second mounting groove 42 to seal, position and clamp the valve body sealing member 3, and meanwhile, the inner protruding portion and the valve body sealing member 3 body are forced to be tensioned outwards together to form fixation so as to keep the axial and radial positions of the valve body sealing member 3, and the valve body sealing member 3 is prevented from being deflected up and down, so that the valve body sealing member 3 is not easy to fall off.

As shown in fig. 2 and 4, the valve body seal 3 includes a first abutment surface 32, a second abutment surface 33, and a third abutment surface 34, the valve body 4 further includes a receiving portion provided below the valve body seal 3, the first abutment surface 32 abuts against a bottom surface of the seal groove 11 or a lower surface of the seal moving member 1, the second abutment surface 33 abuts against an inner side surface of the seal groove 11, the third abutment surface 34 abuts against a receiving portion on the valve body 4, specifically, the second abutment surface 33 and the inner side surface of the seal groove 11 are both in conical surface structures, and are parallel to each other, and when the explosion-proof relief valve is normally operated, the second abutment surface 33 and the inner side surface of the seal groove 11 are pressed against each other to form a waterproof and dustproof seal. The first abutment surface 32 and the third abutment surface 34 may be provided in an arc surface structure or a planar structure, and in this embodiment, the first abutment surface 32 is in an arc surface structure, the third abutment surface 34 is in a planar structure, and smooth transitions are formed between the first abutment surface 32 and the second abutment surface 33 and between the second abutment surface 33 and the third abutment surface 34. More specifically, the receiving portion may be a boss provided on the upper surface of the valve body 4, or may be the upper surface of the valve body 4, and in this embodiment, the receiving portion is the upper surface of the valve body 4. When the explosion-proof pressure release valve is installed, the inner protruding part 31 is in surface lamination with the inner side surface of the second installation groove 42, the second abutting surface 33 is in surface lamination with the inner side surface of the sealing groove 11, and the third abutting surface 34 is in surface lamination with the valve body 4, so that the problem of uneven cambered surface stress can be avoided, the valve body sealing piece 3 is uniformly and equally deformed, the waterproof performance of the explosion-proof pressure release valve is improved, and when the surfaces are in surface contact, the contact area and the stress area are larger, the sealing failure caused by tiny defects of the valve body sealing piece 3 and the entering of dust slurry can be effectively avoided, and the waterproof and dustproof performance of the valve body sealing piece 3 is further improved.

Further, the radial protruding portion 31 is in interference fit with the second mounting groove 42, specifically, the ratio of the height of the sealing member mounting portion to the height of the valve body sealing member 3 is 70% -90%, the ratio of the volume of the second mounting groove 42 to the volume of the inner protruding portion 31 is 80% -90%, the movable sealing member 1 is under the action of the elastic force of the spring 6, the valve body sealing member 3 is pressed, the valve body sealing member 3 is compressed by the elastic force, elastic deformation is generated, and the sealing effect is achieved.

As shown in fig. 2, the battery pack sealing member 5 is in interference fit with the first mounting groove 41, in this embodiment, symmetrical radial protruding structures are disposed on the inner and outer sides of the battery pack sealing member 5, the cross-sectional width of the battery pack sealing member 5 is larger than that of the first mounting groove 41, the height of the battery pack sealing member 5 is larger than the depth of the first mounting groove 41, specifically, the ratio of the depth of the first mounting groove 41 to the height of the battery pack sealing member 5 is 70% -90%, and the ratio of the volume of the first mounting groove 41 to the volume of the battery pack sealing member 5 is 80% -90%.

Because the explosion-proof pressure release valve is arranged outside the battery pack, the valve body sealing member 3 is required to be subjected to UL94 flame retardant rating test under the influence of the extremely high and low temperature working environment in the presence of the working environment temperature of-40 ℃ to 150 ℃ facing various extremely severe conditions in complex working conditions, and specifically, the highest V-0 flame retardant rating test is required to be passed, namely, after the valve body sealing member 3 is subjected to two 10-second combustion tests, flame is extinguished within 10 seconds. Meanwhile, the explosion-proof pressure release valve also needs to face severe working conditions, a large amount of impurities such as slurry, sand dust and moisture exist in the working environment, the valve body sealing member 3 is required to be subjected to IP protection level test, specifically, the highest protection level IP68 and/or IPX9K protection level test is required to be passed, and meanwhile, the surface of the valve body sealing member 3 is required to have good smoothness and dust and dirt prevention capability.

As shown in fig. 1 and 2, when the explosion-proof relief valve is assembled, the magnet sheet 2 is covered on the upper surface of the valve body 4, the valve body sealing member 3 is stretched and expanded outwards, and is sleeved on the sealing member mounting part of the valve body 4, so that the inner protruding part 31 is embedded in the second mounting groove 42, and the third abutting surface 34 abuts against the upper surface of the valve body 4; the movable sealing member 1 is covered on the outer end of the pressure relief hole 43, so that the magnet sheet 2 is embedded into the magnet mounting groove of the movable sealing member 1, the magnet sheet 2 and the magnet mounting groove are fixedly connected in a bonding or interference fit mode, the bottom surface of the sealing groove 11 is abutted with the first abutting surface 32 of the valve body sealing member 3, the inner side surface of the sealing groove 11 is abutted with the second abutting surface 33, and the upper surface of the valve body 4 is abutted with the third abutting surface 34. The spring 6 is sleeved on the body of the opening and closing guide rod 7, and an inner hole at one end of the spring 6 passes through the second clamping boss and is in butt joint with a second spring bearing part at the lower end of the opening and closing guide rod 7; the opening and closing guide rod 7 passes through the through hole of the valve body 4, meanwhile, the inner hole at the other end of the spring 6 passes through the first clamping boss at the lower end of the valve body 4 and is in butt joint with the first spring bearing part at the lower end of the valve body 4, at the moment, the opening and closing guide rod 7 is rotated, the opening and closing guide rod 7 and the movable sealing piece 1 are fixed through threaded connection, the spring jacket 8 is sleeved outside the spring 6, the opening of the spring jacket 8 is connected with the valve body 4, and finally the battery pack sealing piece 5 passes through the spring jacket 8 and is embedded into the first mounting groove 41 of the valve body 4.

As the preferred scheme of explosion-proof relief valve, valve body 4 both sides are equipped with symmetrical mounting hole, and in this embodiment, valve body 4 both sides are equipped with symmetrical through-hole and counter bore, can install the explosion-proof relief valve on the battery package through the mode of screw locking.

Embodiment two:

as shown in fig. 5 to 8, on the basis of the first embodiment, this embodiment provides another explosion-proof pressure release valve, which is different from the first embodiment in that:

the cross section of the inner protruding portion 31 is a rectangular structure, the lower surface of the rectangle and the third abutting surface 34 are located on the same horizontal plane, the third abutting surface 34 abuts against the upper surface of the valve body 4, the first abutting surface 32 is of a planar structure and is parallel to the third abutting surface 34, the first abutting surface 32 abuts against the lower surface of the movable sealing member 1, the first abutting surface 32 is located below the second abutting surface 33, the second abutting surface 33 is of a conical surface structure, and the inner side of the sealing groove 11 is also of a conical surface structure and is parallel to the second abutting surface 33. When the explosion-proof relief valve is closed, the first abutting surface 32 is in surface contact with the lower surface of the movable sealing member 1, the second abutting surface 33 is in surface contact with the inner side surface of the sealing groove 11, and the third abutting surface 34 is in surface contact with the upper surface of the valve body 4, so that a waterproof and dustproof seal is formed.

In other embodiments, the cross section of the inner boss 31 may be provided in a triangular structure, a circular structure, an elliptical structure, or a polygonal structure.

In this embodiment, during the long-term use of the valve body seal member 3, the first abutment surface 32 is used as the main stress surface, and plastic deformation is inevitably generated, but since the second abutment surface 33 is of a conical surface structure, the pressure applied during the working process is smaller than that of the first abutment surface 32, the stress area is also smaller than that of the first abutment surface 32, and the corresponding plastic deformation amount is smaller, when the sealing performance of the first abutment surface 32 is reduced due to the excessive plastic deformation, the second abutment surface 33 becomes the main stress surface, and the second waterproof and dustproof sealing is performed, so that the service life of the valve body seal member 3 is prolonged.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. An explosion-proof pressure relief valve comprises a sealing movable part (1), a valve body (4) and an elastic opening and closing assembly, wherein the valve body (4) is provided with a pressure relief hole (43), the sealing movable part (1) is covered at the outer end of the pressure relief hole (43), and the elastic opening and closing assembly is connected with the sealing movable part (1);

the method is characterized in that: the explosion-proof relief valve still includes valve body sealing member (3), valve body sealing member (3) set up to annular structure and rise tightly set up in seal moving part (1) with between valve body (4), the inboard of valve body sealing member (3) is equipped with radial bellying (31), the first end of valve body (4) is equipped with the installation department, the installation department periphery is equipped with and supplies second mounting groove (42) of radial bellying (31) embedding.

2. The explosion-proof relief valve according to claim 1, wherein one end of the sealing movable member (1) close to the valve body (4) is provided with a sealing groove (11), the valve body sealing member (3) comprises a first abutting surface (32), a second abutting surface (33) and a third abutting surface (34), the first abutting surface (32) abuts against the bottom surface of the sealing groove (11) or the lower surface of the sealing movable member (1), the second abutting surface (33) abuts against the side surface of the sealing groove (11), the second abutting surface (33) and the inner side surface of the sealing groove (11) are both provided with conical surface structures, the valve body (4) further comprises a bearing part arranged below the valve body sealing member (3), and the third abutting surface (34) abuts against the bearing part.

3. The explosion-proof pressure relief valve according to claim 2, wherein the socket is an upper surface of the valve body (4).

4. The explosion-proof pressure relief valve according to claim 1, wherein the cross section of the second mounting groove (42) and the radial protrusion (31) are each provided in a rectangular structure, a triangular structure, a circular structure or an elliptical structure.

5. The explosion-proof pressure relief valve according to claim 1, wherein the radial projection (31) is in transition engagement with the second mounting groove (42).

6. The explosion-proof pressure relief valve according to any one of claims 1-5, further comprising a spring jacket (8), wherein the elastic opening and closing assembly comprises a spring (6) and an opening and closing guide rod (7), the spring jacket (8) is connected with the valve body (4), the opening and closing guide rod (7) is arranged in the spring jacket (8) and penetrates through the valve body (4), the top of the opening and closing guide rod (7) is connected with the sealing movable piece (1), the spring (6) is sleeved on the opening and closing guide rod (7), two ends of the spring (6) are respectively abutted against the valve body (4) and the bottom of the opening and closing guide rod (7), and the spring (6) has a tendency of pushing the opening and closing guide rod (7) to move.

7. The explosion-proof pressure release valve according to claim 2, further comprising a magnet piece (2), wherein a magnet mounting groove for embedding the magnet piece (2) is formed in the bottom surface of the sealing groove (11), the magnet piece (2) is embedded in the magnet mounting groove, and the magnet piece (2) is fixedly connected with the magnet mounting groove.

8. A battery pack comprising the explosion-proof pressure release valve according to any one of claims 1 to 7.

9. The battery pack according to claim 8, wherein the valve body (4) is provided with a first mounting groove (41) at a second end, the explosion-proof pressure relief valve further comprising a battery pack sealing member (5), the battery pack sealing member (5) being mounted in the first mounting groove (41) for blocking a gap between the explosion-proof pressure relief valve and the battery pack.

10. The battery pack according to claim 9, wherein the battery pack seal (5) is interference fit with the first mounting groove (41).