Anti-explosion pressure release valve and battery pack

Abstract

The utility model provides an anti-explosion pressure release valve which is suitable for a battery pack and comprises a base, a deformation mounting structure and a cover body, the base is provided with an upper surface and a lower surface which are opposite, and air holes penetrate through the upper surface and the lower surface of the base. The deformation installation structure is arranged on the lower surface of the base and protrudes downwards out of the lower surface of the base. The deformation mounting structure can elastically contract and release in the direction parallel to the lower surface of the base, the middle of the outer side of the deformation mounting structure protrudes outwards to form a positioning part, and the deformation mounting structure forms a concave fixing part between the positioning part and the base. The cover body covers the upper surface of the base and forms a channel for air to flow, and the channel is communicated with the air holes through air. The anti-explosion pressure release valve is simple in structure, capable of meeting the protection requirement, convenient to install and capable of being recycled, and cost is greatly saved. The utility model further provides a battery pack with the explosion-proof pressure release valve.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief, in particular to an explosion-proof pressure relief valve and a battery pack. Background Art

[0002] Common battery pack enclosures have requirements for dust and water protection. The interior of the battery pack enclosure needs to be designed as a closed structure. Due to lightweight design, the battery pack enclosure can withstand little pressure. When a new energy vehicle or energy storage facility is working, the battery pack will generate heat inside, causing the internal pressure to rise. This leads to an imbalance in the pressure difference between the inside and outside of the battery pack, which will have an adverse impact on the equipment. When a thermal runaway occurs in the battery chip unit, the pressure inside the battery pack suddenly rises, which will damage the battery pack and pose a threat to the safety of the equipment and personnel. The existing solution is to design an appropriate pressure relief valve to ensure the balance of the air pressure difference between the inside and outside of the battery pack, reduce potential risks, and quickly relieve pressure to reduce the harm caused by the battery pack when a thermal runaway occurs in a new energy vehicle or energy storage device. Pressure relief technology is an important part in the battery field.

[0003] In the prior art, most explosion-proof valves are spring-type structures. The sealing performance is ensured by the pre-pressure of the spring. When the pressure can pull open the spring, the valve body opens to achieve a protective effect. Most of these explosion-proof valve structures are complex, with numerous components, troublesome assembly, and high costs. Moreover, pressure relief valves are generally made of metal materials. The pressure relief valves made of metal materials are heavy, and the processing technology is complex, with low material utilization rate. In addition, due to the problem of rusting of metal parts, the valve will rust and cannot be opened after being used for a period of time, or the protection ability will be weakened. Furthermore, most of the existing pressure relief valves cannot be reused after pressure relief, which will undoubtedly cause waste and increase costs.

[0004] Therefore, it is necessary to provide an explosion-proof pressure relief valve that can meet the protection requirements, has a simple structure, and can be recycled to save costs. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an explosion-proof pressure relief valve that can meet the protection requirements, has a simple structure, and can be recycled to save costs.

[0006] Another purpose of the utility model is to provide a battery pack provided with the above explosion-proof pressure relief valve.

[0007] To achieve the above purposes, the utility model provides an explosion-proof pressure relief valve applicable to a battery pack, including:

[0008] A base having opposite upper and lower surfaces, and an air hole is provided through the upper and lower surfaces;

[0009] The deformation installation structure is arranged on the base and protrudes downward from the lower surface of the base. The deformation installation structure can elastically contract and release in the direction parallel to the lower surface of the base. The middle part of the outer side of the deformation installation structure protrudes outward to form a positioning part, and the deformation installation structure forms a concave fixing part between the positioning part and the base.

[0010] The cover body covers the upper surface of the base and forms a channel for gas flow. The gas in the channel is communicated with the air hole.

[0011] After adopting the above technical solutions, the explosion-proof pressure relief valve of the present utility model has a simple structure, is convenient to install, can be recycled, and is more cost-saving. The explosion-proof pressure relief valve includes a base, a deformation installation structure and a cover body. The base has opposite upper and lower surfaces, and the base is provided with an air hole penetrating through its upper and lower surfaces. The cover body cooperates with the base to form a channel for gas flow on the air hole, and the gas between the channel and the air hole is communicated. The channel is used for the interactive flow of gas inside and outside the battery pack when the battery pack is in normal use. The deformation installation structure is arranged on the lower surface of the base and protrudes downward from the lower surface of the base. The deformation installation structure can elastically contract and release in the direction parallel to the lower surface of the base so as to be installed in the battery pack and can be withdrawn from the battery pack. On the other hand, the middle part of the outer side of the deformation installation structure protrudes outward to form a positioning part, and the deformation installation structure forms a concave fixing part between the positioning part and the base. When the explosion-proof pressure relief valve is installed in the battery pack, the fixing part is clamped at the pressure relief hole of the battery pack, and the positioning part plays a limiting role, and the overall structure is stable and reliable. When installing the explosion-proof pressure relief valve, by squeezing the positioning part, the whole deformation installation structure undergoes elastic deformation, so that the outer diameter of the deformation installation structure becomes smaller to be able to be installed into the battery pack. The deformation installation structure installed in the battery pack returns to its initial position after deformation and cooperates with the base to stably install the whole explosion-proof pressure relief valve on the battery pack. When the internal pressure of the battery pack surges sharply, the base is stressed and drives the deformation installation structure to undergo elastic deformation, so that the deformation installation structure disengages from the battery pack to exhaust and relieve pressure. The explosion-proof pressure relief valve of the present utility model has a simple structure, can meet the protection requirements, is convenient to install, can be recycled, and greatly saves costs.

[0012] Preferably, the deformation installation structure includes a plurality of positioning members, and the plurality of positioning members are distributed around the air hole.

[0013] Preferably, both sides of each positioning member are provided with groove bodies, and the groove bodies enable the positioning member to elastically move in the axial direction of the air hole.

[0014] Preferably, the middle part of the outer side of each positioning member has a convex part that protrudes outward in an arc shape, and the plurality of convex parts form a positioning part.

[0015] Preferably, the lower end of the deformation installation structure is inwardly retracted to form a guiding part for easy installation.

[0016] Preferably, a plurality of first engaging portions are provided on the peripheral side surfaces of the base, and the cover body has a plurality of second engaging portions formed by bending and extending downward from the periphery, and the second engaging portions are correspondingly engaged with the first engaging portions.

[0017] Preferably, a breathable film for gas passage is covered on the air holes of the base.

[0018] Preferably, a first installation groove is formed on the outer periphery of the air holes of the base. The breathable film includes a film body and an installation outer ring, and the installation outer ring is welded and fixed in the first installation groove, while the film body faces the air holes.

[0019] To achieve the above another object, the present invention provides a battery pack, which includes a box body with a pressure relief hole formed thereon, and further includes the above explosion-proof pressure relief valve. The explosion-proof pressure relief valve is installed and fixed in the pressure relief hole through the elastic contraction and release of the deformation installation structure, and the base and the cover body assembly seal the pressure relief hole.

[0020] After adopting the above technical solutions, the battery pack of the present invention is provided with an explosion-proof pressure relief valve, which can not only meet the protection requirements, but also has a simple structure and is convenient to install on the battery pack. The explosion-proof pressure relief valve can also be recycled, greatly saving costs.

[0021] Preferably, a second installation groove is formed on the peripheral edge of the lower surface of the base, and a sealing member is installed in the second installation groove, and the sealing member is attached to the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a structural diagram of an explosion-proof pressure relief valve provided by an embodiment of the present invention.

[0024] Figure 2 is Figure 1 The cross-sectional view of.

[0025] Figure 3 is Figure 2 The cross-sectional view of the explosion-proof pressure relief valve in the pressure relief state in.

[0026] Figure 4 is Figure 1 The structural diagram of the housing in.

[0027] Figure 5 is Figure 4 The cross-sectional view of.

[0028] Figure 6Yes Figure 1 A sectional exploded view of the pressure relief component and the guiding component in it.

[0029] Figure 7 It is a partial structural diagram of the explosion-proof pressure relief valve provided by an embodiment of the present invention installed on the battery pack.

[0030] Figure 8 Yes Figure 7 A partial structural diagram of the explosion-proof pressure relief valve in it gradually detaching from the battery pack.

[0031] Figure 9 Yes Figure 7 A partial structural diagram of the explosion-proof pressure relief valve in it detaching from the battery pack.

[0032] Explanation of reference numerals:

[0033] 1000, battery pack;

[0034] 100, explosion-proof pressure relief valve; 101, valve body;

[0035] 10, base; 11, air hole; 12, first installation groove; 13, first engaging portion; 14, second installation groove; 102, fixing portion;

[0036] 20, deformation installation structure; 201, positioning portion; 202, cavity; 21, positioning member; 211, convex portion; 212, guiding portion; 22, groove body;

[0037] 30, cover body; 301, channel; 31, second engaging portion; 311, clamping projection; 32, rib;

[0038] 40, seal;

[0039] 50, breathable film;

[0040] 200, box body; 210, pressure relief hole. Specific embodiments

[0041] In order to elaborate in detail the technical content and structural features of the present invention, the following further explanations are provided in conjunction with the embodiments and the accompanying drawings.

[0042] Please refer to Figures 1 to 3, the present utility model provides an explosion-proof pressure relief valve 100, which is applicable to a battery pack 1000. When the battery pack 1000 is in thermal runaway, the explosion-proof pressure relief valve 100 can be separated from the battery pack 1000 and quickly relieve pressure to reduce the possible hazards caused by the battery pack 1000 during thermal runaway. The explosion-proof pressure relief valve 100 includes a base 10, a deformation mounting structure 20, and a cover 30. The base 10 has an upper surface and a lower surface opposite to each other. The base 10 is provided with an air hole 11 penetrating through its upper surface and lower surface. The deformation mounting structure 20 is disposed on the lower surface of the base 10 and protrudes downward from the lower surface of the base 10. The deformation mounting structure 20 can elastically contract and release in a direction parallel to the lower surface of the base 10. That is, the deformation mounting structure 20 can elastically move in the axial direction of the air hole 11. The deformation mounting structure 20 can form a valve body 101 with the base 10, that is, the valve body 101 includes the base 10 and the deformation mounting structure 20. The cover 30 covers the upper surface of the base 10, that is, the cover 30 covers the surface of the base 10 away from the deformation mounting structure 20, and can form a channel 301 for gas flow between the base 10 and the cover 30. The channel 301 is in gas communication with the air hole 11. During the normal operation of the battery pack 1000, the external gas and the gas inside the battery pack 1000 interact through the channel 301. Among them, a positioning portion 201 protrudes outward in the middle of the outer side of the deformation mounting structure 20, and the protruding direction of the positioning portion 201 is substantially perpendicular to the axial direction of the air hole 11. The positioning portion 201 can elastically move with the deformation mounting structure 20, and the valve body 101 can be snap-fitted and mounted on the battery pack 1000 through the cooperation of the positioning portion 201 and the base 10. Specifically, the deformation mounting structure 20 forms a concave fixing portion 102 between the positioning portion 201 and the base 10, and the fixing portion 102 can be snap-fitted and fixed on the battery pack 1000. When installing the valve body 101, the positioning portion 201 is elastically extruded so that the positioning portion 201 elastically moves with the deformation mounting structure 20, so that the deformation mounting structure 20 can pass through the pressure relief hole 210 on the battery pack 1000 and be snap-fitted and fixed on the battery pack 1000 through the fixing portion 102. On the other hand, the base 10 is stressed and drives the deformation mounting structure 20 to elastically deform to separate from the pressure relief hole 210 of the battery pack 1000 for exhaust pressure relief.

[0043] After adopting the above technical solution, the explosion-proof pressure relief valve 100 of the present utility model has a simple structure, is easy to install, and can be recycled, which saves more costs. The explosion-proof pressure relief valve 100 includes a base 10, a deformation installation structure 20, and a cover body 30. The base 10 has an upper surface and a lower surface opposite to each other, and the base 10 is provided with air holes 11 penetrating through its upper surface and lower surface. The cover body 30 cooperates with the base 10 to form a channel 301 for gas flow on the air holes 11. The channel 301 is in gas communication with the air holes 11, and the channel 301 is used for the interactive flow of gas inside and outside the battery pack 1000 during the normal use of the battery pack 1000. The deformation installation structure 20 is disposed on the lower surface of the base 10 and protrudes downward from the lower surface of the base 10. The deformation installation structure 20 can elastically contract and release in a direction parallel to the lower surface of the base 10, so as to be installed in the battery pack 1000 and can be withdrawn from the battery pack 1000. On the other hand, a positioning portion 201 protrudes outward in the middle of the outer side of the deformation installation structure 20, and the deformation installation structure 20 forms a concave fixing portion 102 between the positioning portion 201 and the base 10. Among them, the base 10 and the deformation installation structure 20 can form an integral valve body 101. The positioning portion 201 can elastically move along with the deformation installation structure 20, and the fixing portion 102 formed by the cooperation of the positioning portion 201 and the base 10 is used to snap-fit and install the valve body 101 on the battery pack 1000. When installing the explosion-proof pressure relief valve 100, by squeezing the positioning portion 201, the entire deformation installation structure 20 undergoes elastic deformation, so that the outer diameter of the deformation installation structure 20 becomes smaller to be able to be installed into the battery pack 1000. The deformation installation structure 20 installed in the battery pack 1000 returns to its initial position after deformation and cooperates with the base 10, so that the entire explosion-proof pressure relief valve 100 is stably installed on the battery pack 1000 through the fixing portion 102. When the internal pressure of the battery pack 1000 surges, the base 10 is stressed and drives the deformation installation structure 20 to undergo elastic deformation, so that the deformation installation structure 20 is separated from the battery pack 1000 to exhaust and relieve pressure. The explosion-proof pressure relief valve 100 of the present utility model has a simple structure, can meet the protection requirements, is easy to install, and can be recycled, greatly saving costs.

[0044] Please refer to Figures 2 to 4, in some alternative embodiments, the deformation mounting structure 20 includes a plurality of positioning members 21, and the plurality of positioning members 21 are distributed around the air holes 11. In some embodiments, the plurality of positioning members 21 are distributed on the base 10 to form a cavity 202, and each positioning member 21 can elastically move relative to the base 10 and always has a reset tendency. Among them, both sides of each positioning member 21 have a groove 22, and the positioning member 21 can elastically move in the axial direction of the air hole 11 through the groove 22. That is, the positioning member 21 can elastically move within a certain range in the direction of approaching or departing from the center of the cavity 202. It can be understood that a plurality of grooves 22 are provided at certain intervals along the circumference of the deformation mounting structure 20 to form a plurality of positioning members 21. The entire deformation mounting structure 20 can elastically move. By providing a plurality of grooves 22 to form a plurality of positioning members 21, each positioning member 21 can better perform elastic movement, with a wider movement range and a better reset effect, which is more convenient for installing the valve body 101 on the battery pack 1000. Of course, the deformation mounting structure 20 can also be a structure with only two positioning members 21, as long as the deformation mounting structure 20 can elastically deform towards the center of the cavity 202 and has a reset tendency. The number of positioning members 21 can be set according to actual installation and use requirements.

[0045] Please refer to Figures 1 to 4, in some alternative embodiments, the middle part of the outer side of each positioning member 21 has a convex portion 211 that protrudes outward in an arc shape, and a plurality of convex portions 211 form a positioning portion 201. It can be understood that the convex portion 211 is protrudingly provided on the positioning member 21, and the positions of the convex portions 211 on each positioning member 21 are substantially the same, so as to form an annular positioning portion 201 on the outer side surface of the deformation mounting structure 20. After the valve body 101 is installed on the battery pack 1000, the positioning portion 201 can play a limiting role to prevent the valve body 101 from detaching from the pressure relief hole 210 on the battery pack 1000. In some embodiments, the convex portion 211 can be fixed on the positioning member 21 by means of adhesion or the like. The convex portion 211 can be in a semi-circular shape and smoothly transition with the positioning member 21. In some other embodiments, the convex portion 211 and the positioning member 21 are of an integral structure, that is, the convex portion 211 and the positioning member 21 are integrally formed, and the convex portion 211 and the positioning member 21 are smoothly transitioned. Specifically, the positioning member 21 is in a vertical shape, and an arc-shaped convex portion 211 is protrudingly provided on the side of the positioning member 21 away from the cavity 202. A plurality of convex portions 211 form an annular positioning portion 201 on the outer sides of the plurality of positioning members 21, so that the valve body 101 can be stably installed in the battery pack 1000. In this embodiment, the positioning member 21 arches away from the cavity 202 to form an arc-shaped structure and form the convex portion 211. Moreover, the lower end of the deformation mounting structure 20 is inwardly retracted to form a guiding portion 212 for convenient installation. That is, the positioning member 21 itself is bent into an arc shape, so that the positioning member 21 has a convex portion 211 protruding outward, and at the same time has an inwardly contracting guiding portion 212 at the end. The guiding portion 212 enables the deformation mounting structure 20 to be more conveniently installed in the pressure relief hole 210. A plurality of convex portions 211 form an annular positioning portion 201, and the structure is simple and reasonable. Among them, as long as the positioning member 21 has a convex portion 211 protruding outward and the convex portion 211 is in an arc-shaped structure. The arc-shaped convex portion 211 can smoothly transition with the positioning member 21, so that the entire valve body 101 can be more conveniently installed in the battery pack 1000 or withdrawn from the battery pack 1000 without being affected by jamming.

[0046] Please refer to Figure 3 , Figure 4 and Figure 6, in some alternative embodiments, multiple positioning members 21 can be circularly distributed on the base 10, that is, the pressure relief holes 210 on the battery pack 1000 are circular and adapted to the deformation mounting structure 20. Or multiple positioning members 21 are elliptically distributed on the base 10, that is, the pressure relief holes 210 on the battery pack 1000 are elliptical and adapted to the deformation mounting structure 20. Or multiple positioning members 21 are polygonally distributed on the base 10, and the shape of the pressure relief holes 210 is adapted to the shape formed by the multiple positioning members 21 to make the installation more stable. The multiple positioning members 21 can also be enclosed in a star shape, a quadrilateral, a pentagon, etc., and the shape of the pressure relief holes 210 is adapted to the shape formed by the multiple positioning members 21.

[0047] Please refer to Figures 1 to 6 , in some alternative embodiments, the base 10 and the deformation mounting structure 20 are of an integral structure, and a fixing portion 102 is formed between the base 10 and the deformation mounting structure 20. The base 10 and the deformation mounting structure 20 are integrally formed, and the structure is more stable and reliable. The positioning portion 201 is located on one side of the fixing portion 102, and the fixing portion 102 is engaged with the pressure relief hole 210 of the battery pack 1000, which is convenient and stable for installation. The positioning portion 201 limits the position inside the battery pack 1000 so that the fixing portion 102 is firmly engaged with the pressure relief hole 210 of the battery pack 1000, and the valve body 101 is prevented from detaching from the battery pack 1000 under non-accidental circumstances, and the structure is stable. On the other hand, the deformation mounting structure 20 can also be separately formed from the base 10, and then the deformation mounting structure 20 is connected to the base 10 by means of engagement or other connection methods. The base 10 and the deformation mounting structure 20 are made of plastic materials, or the base 10 and the deformation mounting structure 20 are made of metal materials. The base 10 and the deformation mounting structure 20 can also be made of elastically deformable soft materials.

[0048] Please refer to Figure 5 , in some alternative embodiments, a first mounting groove 12 is formed on the outer periphery of the air hole 11 of the base 10. On the other hand, an air-permeable membrane 50 for gas passage is covered on the air hole 11 of the base 10. The air-permeable membrane 50 includes a membrane body and a mounting outer ring, and the membrane body is welded and fixed to the first mounting groove 12 by the mounting outer ring. The mounting outer ring of the air-permeable membrane 50 is fixed at the first mounting groove 12 of the base 10 by laser welding, the membrane body covers the air hole 11 of the base 10, and the membrane body faces the air hole 11. So that when the battery pack 1000 is working normally, gas only enters and exits the battery pack 1000 through the membrane body.

[0049] Please refer to Figure 3, in some alternative embodiments, a first engaging portion 13 is provided on the peripheral side surfaces of the base 10. The cover 30 has a plurality of second engaging portions 31 formed by bending downward and extending from the periphery. The second engaging portions 31 are correspondingly engaged with the first engaging portions 13 to mount the cover 30 on the base 10. Among them, a locking projection 311 capable of locking the cover 30 to the base 10 is provided inside the second engaging portion 31. By the cooperation of the locking projection 311 and the first engaging portion 13, the cooperation between the cover 30 and the base 10 is strengthened. The cover 30 can protect the breathable membrane 50 from being damaged due to accidents such as pressing or collision. The cover 30 can be a structure made of plastic material. A plurality of ribs 32 are further provided inside the cover 30. The plurality of ribs 32 can cooperate with the base 10 to form a channel 301, so that during the normal operation of the battery pack 1000, the gas outside and the gas inside the battery pack 1000 interact through the channel 301.

[0050] Please refer to Figures 7 to 9 , the present utility model further provides a battery pack 1000, including a box body 200. A pressure relief hole 210 is provided on the box body 200. The battery pack 1000 further includes the above-mentioned explosion-proof pressure relief valve 100. The explosion-proof pressure relief valve 100 includes a base 10, a deformation mounting structure 20, and a cover 30. The explosion-proof pressure relief valve 100 is mounted and fixed to the pressure relief hole 210 through the elastic contraction and release of the deformation mounting structure 20. The base 10 and the cover 30 seal the pressure relief hole 210. When installing the explosion-proof pressure relief valve 100, the deformation mounting structure 20 is squeezed to elastically deform the deformation mounting structure 20 until the outer diameter is smaller than the pressure relief hole 210, and then the deformation mounting structure 20 is mounted in the pressure relief hole 210, and the fixing portion 102 is engaged with the pressure relief hole 210. The positioning portion 201 limits the pressure relief hole 210 inside the battery pack 1000 to prevent the deformation mounting structure 20 from detaching from the pressure relief hole 210. The installation is convenient and the operation is simple. On the other hand, when the battery pack 1000 undergoes thermal runaway, the pressure inside the box body 200 increases sharply. The channel 301 for the interaction of internal and external gases cannot meet the discharge of the pressure inside the box body 200. The gas inside the box body 200 acts on the base 10. This causes the base 10 to tend to move upward under the force and has a tendency to drive the deformation mounting structure 20 to move upward, thereby pulling the deformation mounting structure 20 to elastically deform, so that the positioning portion 201 on the deformation mounting structure 20 is deformed under the force to lose the limiting effect, so that the fixing portion 102 can disengage from the box body 200, and the gas inside the box body 200 can be quickly discharged through the pressure relief hole 210 to achieve the function of exhausting and relieving pressure. After the pressure relief is completed, the explosion-proof pressure relief valve 100 can continue to be recycled and used for this battery pack 1000 or for other battery packs 1000, greatly saving costs.

[0051] Please refer to Figure 4 and Figure 6 and Figures 7 to 9, in some alternative embodiments, a second mounting groove 14 is formed in the peripheral edge of the lower surface of the base 10, and a seal 40 is mounted in the second mounting groove 14. The seal 40 is in contact with the box body 200, and the base 10 and the box body 200 are sealed by means of the seal 40. It can be understood that when the explosion-proof pressure relief valve 100 is installed in the battery pack 1000, it needs to be sealed with the battery pack 1000 to avoid affecting the use due to air leakage and pressure relief. By providing the seal 40 on the contact surface between the base 10 and the box body 200, the explosion-proof pressure relief valve 100 and the box body 200 can be sealed, making the use safer and more reliable.

[0052] As Figures 1 to 9As shown in the figure, the battery pack 1000 of the present utility model includes a box body 200, and an explosion-proof pressure relief valve 100 is arranged on the box body 200. The explosion-proof pressure relief valve 100 includes a base 10, a deformation installation structure 20 and a cover body 30. The base 10 is provided with air holes 11 through its upper surface and lower surface. The cover body 30 cooperates with the base 10 to form a channel 301 for gas flow on the air holes 11, and the gas between the channel 301 and the air holes 11 is communicated. The channel 301 is used for the interactive circulation of the gas inside and outside the battery pack 1000 during the normal use of the battery pack 1000 to keep the internal pressure of the battery pack 1000 stable. The deformation installation structure 20 is arranged on the lower surface of the base 10 and protrudes downward from the lower surface of the base 10. The deformation installation structure 20 can elastically contract and release in the direction parallel to the lower surface of the base 10, so as to be installed in the battery pack 1000 and can be withdrawn from the battery pack 1000. On the other hand, a positioning portion 201 protrudes outward from the middle of the outer side of the deformation installation structure 20, and an inward concave fixing portion 102 is formed between the positioning portion 201 and the base 10 of the deformation installation structure 20. The positioning portion 201 can elastically move along with the deformation installation structure 20, and the valve body 101 is clamped and installed at the pressure relief hole 210 of the battery pack 1000 through the fixing portion 102 formed by the cooperation of the positioning portion 201 and the base 10. When installing the explosion-proof pressure relief valve 100, by squeezing the positioning portion 201, the entire deformation installation structure 20 is elastically deformed, so that the deformation installation structure 20 can be installed at the pressure relief hole 210. The deformation installation structure 20 installed at the pressure relief hole 210 returns to the initial position after deformation to limit the pressure relief hole 210. At this time, the explosion-proof pressure relief valve 100 is stably installed at the pressure relief hole 210 of the battery pack 1000 through the fixing portion 102. On the other hand, when the internal pressure of the battery pack 1000 surges sharply, the base 10 is stressed and drives the deformation installation structure 20 to elastically deform, so that the valve body 101 is separated from the battery pack 1000 to exhaust and relieve pressure. The explosion-proof pressure relief valve 100 of the present utility model has a simple structure, can meet the protection requirements, is convenient to install, and can be recycled, greatly saving costs. The battery pack 1000 of the present utility model can meet the protection requirements, the explosion-proof pressure relief valve 100 has a simple structure, is convenient to install on the battery pack 1000, and the explosion-proof pressure relief valve 100 can also be recycled, greatly saving costs.

[0053] The above-disclosed are only the preferred examples of the present utility model, and the scope of the rights of the present utility model cannot be limited thereby. Therefore, all equivalent changes made according to the claims of the present utility model fall within the scope covered by the present utility model.

Claims

1. An explosion-proof pressure relief valve, suitable for a battery pack, characterized in that: include: A base having an upper surface and a lower surface opposite to each other, and air holes are formed through the upper surface and the lower surface; A deformable mounting structure is arranged on the base and protrudes downward from the lower surface of the base; the deformable mounting structure can be elastically contracted and released in a direction parallel to the lower surface of the base, and the middle part of the outer side of the deformable mounting structure protrudes outward to form a positioning part, and the deformable mounting structure forms a concave fixing part between the positioning part and the base; The cover body covers the upper surface of the base and forms a channel for gas flow, and the gas in the channel is connected to the air hole.

2. The explosion-proof pressure relief valve according to claim 1, characterized in that: The deformable mounting structure includes a plurality of positioning members, and the plurality of positioning members are distributed around the air hole.

3. The explosion-proof pressure relief valve according to claim 2, characterized in that: Both sides of each positioning member are provided with grooves, and the grooves enable the positioning member to elastically move in the axial direction of the air hole.

4. The explosion-proof pressure relief valve according to claim 2, characterized in that: The middle part of the outer side of each positioning member has a convex portion extending outward in an arc shape, and a plurality of the convex portions form the positioning portion.

5. The explosion-proof pressure relief valve according to claim 1, characterized in that: The lower end of the deformable mounting structure is retracted inward to form a guide portion for easy installation.

6. The explosion-proof pressure relief valve according to claim 1, characterized in that: The base is provided with a plurality of first engaging parts on the four sides thereof, and the cover body has a plurality of second engaging parts extending downwardly from the periphery thereof, and the second engaging parts are correspondingly buckled with the first engaging parts.

7. The explosion-proof pressure relief valve according to claim 1, characterized in that: The air holes of the base are covered with a breathable membrane for gas to pass through.

8. The explosion-proof pressure relief valve according to claim 7, characterized in that: A first mounting groove is provided on the periphery of the air hole of the base, and the breathable membrane comprises a membrane body and an mounting outer ring. The mounting outer ring is welded and fixed to the first mounting groove, and the membrane body faces the air hole.

9. A battery pack, comprising a box body, wherein the box body is provided with a pressure relief hole, characterized in that: It also includes the explosion-proof pressure relief valve according to any one of claims 1 to 8, wherein the explosion-proof pressure relief valve is fixed to the pressure relief hole through the elastic contraction and release installation of the deformation mounting structure, and the base and the cover body seal the pressure relief hole.

10. The battery pack according to claim 9, characterized in that: A second installation groove is provided on the periphery of the lower surface of the base, a sealing member is installed in the second installation groove, and the sealing member is fitted with the box body.

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