Explosion-proof valve, battery pack, and electric device

Abstract

The present application relates to the technical field of batteries, and provides an explosion-proof valve, a battery pack, and an electric device. The explosion-proof valve comprises an explosion-proof valve body (100), first snap-fit structures (200), and first reinforcing ribs (300); the explosion-proof valve body (100) comprises an inner structural portion (110) and an outer structural portion (120); the first snap-fit structures (200) are connected to the inner structural portion (110); the outer structural portion (120) at least comprises a first structural portion (121) and a second structural portion (122); a recessed region (123) is formed between the first structural portion (121) and the second structural portion (122); and the first reinforcing ribs (300) are located in the recessed region (123) and are connected to the first structural portion (121) and the second structural portion (122).

Description

An explosion-proof valve, battery pack and electrical equipment

[0001] This application claims priority to Chinese Patent Application No. 202411916147.5, filed on December 20, 2024, entitled “An Explosion-proof Valve, Battery Pack and Electrical Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to an explosion-proof valve, a battery pack, and an electrical device. Background Technology

[0003] To prevent safety accidents such as explosions due to excessive internal temperature during use, battery packs are usually equipped with pressure relief structures such as explosion-proof valves. The high-temperature gas inside the battery pack can be forced open by the explosion-proof valve to achieve the purpose of pressure relief.

[0004] The explosion-proof valve in the relevant technology has an unreasonable structure, which makes it easy for it to crack when impacted by foreign objects during use, thereby causing the battery pack to fail to seal and even causing vehicle safety accidents. Summary of the Invention

[0005] This application provides an explosion-proof valve, a battery pack, and an electrical device that can improve the structural strength of the explosion-proof valve.

[0006] The first aspect of this application provides an explosion-proof valve, comprising: an explosion-proof valve body including an inner structural portion and an outer structural portion; a first snap-fit ​​structure connected to the inner structural portion; and a first reinforcing rib, wherein the outer structural portion includes at least a first structural portion and a second structural portion, a recessed region is formed between the first structural portion and the second structural portion, and the first reinforcing rib is located within the recessed region and connected to the first structural portion and the second structural portion.

[0007] According to the explosion-proof valve described in the first aspect of this application, a first snap-fit ​​structure is connected to the inner structural part of the explosion-proof valve body, so that the explosion-proof valve can be installed on the tray of the battery pack. The outer structural part of the explosion-proof valve body includes a first structural part and a second structural part, and a first reinforcing rib is connected between the two, which can improve the structural strength of the outer side of the explosion-proof valve body from the inside to the outside, so that the explosion-proof valve is not easy to crack when subjected to external impact, thereby ensuring the sealing performance of the battery pack.

[0008] In one possible implementation, the explosion-proof valve body includes a base plate, with the inner structural portion formed on the inner side of the base plate and the outer structural portion formed on the outer side of the base plate.

[0009] In one possible implementation, the explosion-proof valve further includes a waterproof and breathable membrane. The outer structural portion includes: an outer boundary ring connected to the substrate; and a mounting boss connected to the substrate. The mounting boss forms an opening. The waterproof and breathable membrane is connected to the mounting boss and closes the opening. The recessed area is formed between the outer boundary ring and the mounting boss. The first reinforcing rib is connected between the outer boundary ring and the mounting boss.

[0010] In one possible implementation, the mounting boss includes: a boss body; and a support flange connected to the inner edge of the boss body, the support flange forming the opening, and the waterproof and breathable membrane disposed on the support flange.

[0011] In one possible implementation, the boss body includes: a first boss; and a second boss, the second boss being formed on the first boss and adjacent to the opening.

[0012] In one possible implementation, the explosion-proof valve further includes a top cover, on which a second snap-fit ​​structure is provided, and the top cover is mounted on the second snap-fit ​​structure.

[0013] In one possible implementation, the first reinforcing ribs are multiple and arranged at circumferential intervals within the recessed area.

[0014] In one possible implementation, the thickness of the substrate is T, which satisfies the condition: T = 2 mm to 4 mm.

[0015] In one possible implementation, the width of the first reinforcing rib gradually decreases in the direction from near the substrate to far away from the substrate.

[0016] In one possible implementation, the width of the first reinforcing rib connected to one end of the substrate is t, where t satisfies the condition: t≤0.5T.

[0017] In one possible implementation, t satisfies the condition: t = 1 mm ~ 1.3 mm.

[0018] In one possible implementation, the inclination angle of the side of the first reinforcing rib is θ, which satisfies the condition: θ ≥ 0.5°.

[0019] In one possible implementation, θ satisfies the condition: θ = 0.6°~0.8°.

[0020] In one possible implementation, the first reinforcing rib protrudes from the substrate by a height h, where h satisfies the condition: h ≤ 3T.

[0021] In one possible implementation, an arc segment is formed between the first reinforcing rib and the substrate, the radius of the arc segment being r, wherein r satisfies the condition: 0.5T≥r≥0.25T.

[0022] In one possible implementation, r satisfies the condition: r = 0.5 mm ~ 1 mm.

[0023] In one possible implementation, the distance between two adjacent first stiffeners is S, where S satisfies the condition: S≥2T.

[0024] In one possible implementation, the inner structure includes: an inner ring structure connected to the substrate, and the first snap-fit ​​structure connected to the inner ring structure.

[0025] In one possible implementation, the inner ring structure includes: an inner boundary ring; a connecting ring; and a sealing ring connected between the inner boundary ring and the connecting ring.

[0026] In one possible implementation, the first snap-fit ​​structure includes a first latch, and the connecting ring protrudes outward from the position corresponding to the first latch to form a receiving cavity.

[0027] In one possible implementation, the explosion-proof valve further includes an anti-eccentric structure connected to the inner ring structure, the anti-eccentric structure being arranged at intervals from the first snap-fit ​​structure.

[0028] In one possible implementation, the explosion-proof valve further includes a second reinforcing rib, which is connected to the inner ring structure and the outer structure.

[0029] In one possible implementation, the width of the second reinforcing rib gradually decreases from the direction closer to the inner ring structure to the direction farther away from the inner ring structure.

[0030] In one possible implementation, the width of the second reinforcing rib near the inner ring structure is t1, and the width of the second reinforcing rib away from the inner ring structure is t2, wherein t1 satisfies the condition: t1 = 3mm ~ 5mm, and t2 satisfies the condition: t2 = 0.5mm ~ 1mm.

[0031] In one possible implementation, the outer structural portion has an opening, and the second reinforcing rib includes:

[0032] An anti-eccentric structure is connected to the inner ring structure and arranged at intervals with the first buckle structure;

[0033] And a support portion, which is connected to the anti-eccentricity structure and extends into the opening.

[0034] In one possible implementation, there are multiple second reinforcing ribs, and the supporting portions of the multiple second reinforcing ribs intersect within the opening.

[0035] A second aspect of this application provides a battery pack including the explosion-proof valve described in the first aspect.

[0036] According to the battery pack described in the second aspect of this application, based on the setting of the explosion-proof valve, the explosion-proof valve has high structural strength, is not easy to crack, and can improve the sealing performance and safety performance of the battery pack.

[0037] A third aspect of this application provides an electrical device including the battery pack described in the second aspect.

[0038] The electrical equipment described in the third aspect of this application has higher safety performance. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 shows a schematic diagram of the connection between the tray and the explosion-proof valve of a battery pack according to an embodiment of this application;

[0041] Figure 2 shows an exploded view of the tray and explosion-proof valve of a battery pack according to an embodiment of this application;

[0042] Figure 3 shows an exploded view of an explosion-proof valve provided according to an embodiment of this application;

[0043] Figure 4 shows a schematic diagram of the outer structure of an explosion-proof valve provided in an embodiment of this application;

[0044] Figure 5 shows a schematic diagram of the inner structure of an explosion-proof valve according to an embodiment of this application;

[0045] Figure 6 shows a top view of an explosion-proof valve provided according to an embodiment of this application;

[0046] Figure 7 shows a cross-sectional view along the AA direction in Figure 6;

[0047] Figure 8 shows a magnified view of part B in Figure 7.

[0048] Reference numerals: Tray; 101-Pressure relief hole; 20-Explosion-proof valve; Explosion-proof valve body; 110-Inner structural part; 120-Outer structural part; 130-Base plate; 111-Inner ring structure; 121-First structural part; 122-Second structural part; 123-Recessed area; 124-Outer boundary ring; 125-Mounting boss; 1111-Inner boundary ring; 1112-Connecting ring; 1113-Sealing ring; 1241-Second snap-fit ​​structure; 1251-Opening; 1252-Boss body; 1253-Supporting flange; 1112a-Receiving cavity; 1252a-First boss; 1252b-Second boss; 1252c-Outer protrusion; First snap-fit ​​structure; 201-First snap-fit; First reinforcing rib; Waterproof and breathable membrane; Top cover; 501-Second snap-fit; 600 - Second reinforcing rib; 610 - Anti-eccentric structure; 620 - Support part; 611 - Anti-eccentric column; 612 - Connecting part. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] This application provides a battery pack and an electrical device including the battery pack. The electrical device includes an electrical appliance, and the battery pack can provide electrical energy to the electrical appliance. In this application embodiment, the electrical appliance can be a new energy vehicle. Based on the design of the battery pack in this application embodiment, the new energy vehicle has higher safety performance. The vehicle can be a sedan, bus, or truck. For example, the vehicle can be an electric vehicle (EV), a pure electric vehicle / battery electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle, or any vehicle with a battery.

[0051] The vehicle may also include a body, axles, and a motor, wherein the battery pack, axles, and motor may all be mounted on the body. The battery pack may be electrically connected to the motor, and the motor may be connected to the axle. The battery pack provides power to the motor, enabling it to rotate. During rotation, the motor drives the axle to rotate, thus allowing the vehicle to move.

[0052] The vehicle body may include a vehicle chassis and a body mounted on the chassis. The body may have a passenger compartment, which may include a driver's seat, passenger seats, etc., where the driver can operate the vehicle. For example, the vehicle body may also include structural components such as a steering wheel, clutch, and brakes to enable the vehicle to perform its full functions; this application does not impose any limitations on these components.

[0053] With the rapid popularization of new energy vehicles, battery packs, as the power batteries for these vehicles, are being used more and more widely. The overall performance and safety performance of the battery pack largely determine the overall performance and safety performance of the new energy vehicle. Of course, besides new energy vehicles, battery packs can also be used in other applications.

[0054] A battery pack typically includes a housing and battery cell modules and battery thermal management devices installed inside the housing. The battery cell modules are usually arranged in a relatively regular manner inside the housing. A battery cell module includes multiple battery cell units, which are connected in series or in parallel to form a battery cell module.

[0055] The battery cell is the smallest energy unit in a battery pack. It consists of a positive electrode, a separator, and a negative electrode. The exchange of active materials between the positive and negative electrodes allows the battery pack to store or release electrical energy. During this exchange, i.e., during charging and discharging, the battery cell generates heat. Under normal circumstances, this heat is dissipated from the battery pack through a thermal management system, which can be a cold plate with flow channels through which a refrigerant flows to dissipate heat from the battery cell. Under abnormal conditions, such as thermal runaway causing excessively high internal temperatures, or severe impact leading to significant deformation, the high-temperature gases inside the battery pack tend to compress, causing the battery pack to expand. Excessive expansion can lead to an explosion.

[0056] Therefore, battery packs are usually equipped with pressure relief structures such as explosion-proof valves. In the event of the above-mentioned abnormal situation, high-temperature gas can open the explosion-proof valve to achieve the purpose of pressure relief, thereby preventing the battery pack from exploding.

[0057] Considering both cost and performance, explosion-proof valves in related technologies are typically made of engineering plastics, such as PPA (high-temperature resistant nylon) and PPO (polyphenylene oxide). These materials can also contain 10% to 30% glass fiber to enhance their overall strength. The explosion-proof valves are equipped with snap-fit ​​structures, allowing them to be installed onto the battery pack housing.

[0058] When a battery pack is used in a new energy vehicle, the housing can be designed as a tray. Cell modules and battery thermal management devices can be mounted on this tray. When assembling the battery pack for a new energy vehicle, the tray containing the cell modules and battery thermal management devices can be installed onto the vehicle's frame from bottom to top. This application primarily uses the application of a battery pack in a new energy vehicle as an example for illustration; therefore, the tray in the following embodiments can be understood as the housing of the battery pack.

[0059] The explosion-proof valves mentioned above are usually designed based on the pressure relief holes on the housing or tray. For example, when the pressure relief hole is a circular hole, the explosion-proof valve is a disc-shaped structure as a whole. In order to connect the explosion-proof valve to the housing or tray, a buckle is provided on the inner side of the explosion-proof valve (the side facing the battery module). The buckle can be fastened to the housing or tray, and the explosion-proof valve can be installed at the pressure relief hole based on the buckle.

[0060] Understandably, the aforementioned explosion-proof valves focus primarily on their functional implementation. For example, to connect with the pressure relief port, the explosion-proof valve may have a disc-shaped structure with a latch on its inner side. The presence of the latch can, to some extent, disrupt the overall structural balance of the explosion-proof valve, causing structural strength defects and making it susceptible to cracking from impacts by foreign objects during use. This can lead to battery pack sealing failure and even vehicle safety accidents.

[0061] Based on the above-mentioned situation and problems, this application provides an explosion-proof valve that adopts a more refined structural design, which can improve the structural strength of the explosion-proof valve while controlling costs.

[0062] The explosion-proof valve can be made of the aforementioned engineering plastics or other materials, and this application does not impose any restrictions on this.

[0063] Figure 1 shows a schematic diagram of the connection between the tray and the explosion-proof valve of a battery pack according to an embodiment of this application; Figure 2 shows an exploded schematic diagram of the tray and the explosion-proof valve of a battery pack according to an embodiment of this application.

[0064] In this embodiment, referring to Figures 1 and 2, the battery pack may include a tray 10 and an explosion-proof valve 20. The tray 10 can serve as the housing of the battery pack, and cell modules, battery thermal management devices, etc., can be mounted on the tray 10. The tray 10 has a pressure relief hole 101, and the explosion-proof valve 20 can be installed at the pressure relief hole 101, forming a sealed connection between the explosion-proof valve 20 and the pressure relief hole 101.

[0065] In this embodiment, the battery pack is based on the setting of the explosion-proof valve 20. Since the explosion-proof valve 20 has high structural strength and is not easy to crack, it can improve the sealing performance and safety performance of the battery pack.

[0066] In some embodiments, the tray 10 may be made of hollow profile, so that the tray 10 can play a certain role in heat dissipation of the cell module. The tray 10 with this structure can be better matched with the battery thermal management device to control the operating temperature range of the battery pack.

[0067] Figure 3 shows an exploded view of an explosion-proof valve according to an embodiment of this application; Figure 4 shows a structural schematic diagram of the outer structure of an explosion-proof valve according to an embodiment of this application; Figure 5 shows a structural schematic diagram of the inner structure of an explosion-proof valve according to an embodiment of this application.

[0068] In this embodiment of the application, please refer to Figures 3 to 5. The explosion-proof valve 20 includes an explosion-proof valve body 100, a first snap-fit ​​structure 200, and a first reinforcing rib 300.

[0069] The explosion-proof valve body 100 is the main structure of the explosion-proof valve 20, and it serves as the primary stress-bearing component when the battery pack is subjected to external impact. The explosion-proof valve body 100 can be made of engineering plastics, such as PPA, PPO, or other materials.

[0070] The explosion-proof valve body 100 can be designed according to the shape of the pressure relief hole 101. For example, in the example shown in Figure 2, the pressure relief hole 101 is a circular hole. Correspondingly, the explosion-proof valve body 100 can be designed as a cylinder or a disc. It is understood that in other embodiments, the explosion-proof valve body 100 can also be designed as other shapes, such as square. For ease of understanding and simplification, the explosion-proof valve body 100 in the following embodiments can be understood as cylindrical.

[0071] The explosion-proof valve body 100 has an inner side and an outer side. The inner side is the part of the explosion-proof valve body 100 that needs to be connected to the tray 10, and it can face the battery cell module in the tray 10. The outer side is the part of the explosion-proof valve body that protrudes from the tray 10, and it can face away from the battery cell module. When the explosion-proof valve 20 is installed on the pressure relief hole 101, the explosion-proof valve 20 can perform three functions: first, a connection function with the tray 10; second, a sealing function with the tray 10; and third, an impact-resistant function to resist external impacts. In this embodiment, the connection and sealing functions can be achieved by designing the inner side of the explosion-proof valve body 100, and the impact-resistant function can be achieved by improving the overall structural strength of the explosion-proof valve.

[0072] Based on this, the explosion-proof valve body 100 in this embodiment includes an inner structural part 110 and an outer structural part 120. The inner structural part 110 corresponds to the inner side of the explosion-proof valve body 100, and the outer structural part 120 corresponds to the outer side of the explosion-proof valve body 100.

[0073] The first snap-fit ​​structure 200 is connected to the inner structure part 110. The first snap-fit ​​structure 200 can realize the connection between the explosion-proof valve 20 and the tray 10. The specific structural type of the first snap-fit ​​structure 200 is not limited. For example, the first snap-fit ​​structure 200 can be a protruding column structure extending out of the explosion-proof valve body 100. The protruding column structure can be connected to the relevant structure on the tray 10.

[0074] There can be multiple first snap-fit ​​structures 200, and these multiple first snap-fit ​​structures 200 can be arranged circumferentially so that when the explosion-proof valve 20 is connected to the tray 10 by the first snap-fit ​​structure 200, the bonding force between the tray 10 and the explosion-proof valve 20 can be evenly distributed on the multiple first snap-fit ​​structures 200.

[0075] The first snap-fit ​​structure 200 can be integrally formed with the explosion-proof valve body 100, or it can be connected to the explosion-proof valve body 100 as a separate component through mechanical connection or other means.

[0076] It is understandable that, in order to achieve the connection between the first snap-fit ​​structure 200 and the tray 10, the length of the first snap-fit ​​structure 200 extending out of the explosion-proof valve body 100 should be adapted to the depth of the pressure relief hole 101 on the tray 10. For example, when the wall thickness of the tray 10 is 3mm to 5mm, the length can be set to 3mm to 5mm.

[0077] The first reinforcing rib 300 is used to enhance the structural strength of the outer structural part 120. The outer structural part 120 may include a first structural part 121 and a second structural part 122. The first structural part 121 and the second structural part 122 are two components on the outer structure. The position and function of the first structural part 121 and the second structural part 122 can be set according to different functions. A recessed area 123 is formed between the first structural part 121 and the second structural part 122. The first reinforcing rib 300 is located in the recessed area 123 and is connected to the first structural part 121 and the second structural part 122.

[0078] As for the cylindrical explosion-proof valve body 100, the functions and structural composition of the outer structural portion 120 can be set circumferentially from the inside out. The first structural portion 121 and the second structural portion 122 can be arranged circumferentially and spaced apart. The first structural portion 121 can be located outside the second structural portion 122, and the first structural portion 121 and the second structural portion 122 can be arranged concentrically. Providing a first reinforcing rib 300 between the first structural portion 121 and the second structural portion 122 can improve the structural strength of the outer side of the explosion-proof valve body 100.

[0079] In this embodiment of the application, the explosion-proof valve 20 has a first snap-fit ​​structure 200 connected to the inner structural part 110 of the explosion-proof valve body 100, so that the explosion-proof valve 20 can be installed on the tray 10 of the battery pack. The outer structural part 120 of the explosion-proof valve body 100 includes a first structural part 121 and a second structural part 122, and a first reinforcing rib 300 is connected between the two, which can improve the structural strength of the outer side of the explosion-proof valve body from the inside to the outside, so that the explosion-proof valve 20 is not easy to crack when subjected to external impact, thereby ensuring the sealing performance of the battery pack.

[0080] In some embodiments, referring to FIG4, the first structural portion 121 and the second structural portion 122 are in a ring structure and the first structural portion 121 is located outside the second structural portion 122. The first structural portion 121 and the second structural portion 122 are concentrically arranged, and the first reinforcing rib 300 is radially connected between the first structural portion 121 and the second structural portion 122 along the ring structure.

[0081] Therefore, when the first structural part 121 is subjected to an external impact, the force acting on the first structural part 121 can be transmitted to the second structural part 122 by the first reinforcing rib 300, so that the impact force can be distributed on the outer structural part 120 of the entire explosion-proof valve body 100, and severe deformation of the outer structural part 120 in a local position can be avoided.

[0082] The first reinforcing rib 300 can be multiple and evenly spaced along the circumference, thereby further enhancing the impact resistance of the outer structural part 120.

[0083] In some embodiments, please refer to FIG3 and FIG4, the explosion-proof valve body 100 includes a substrate 130, an inner structural portion 110 is formed on the inner side of the substrate 130, and an outer structural portion 120 is formed on the outer side of the substrate 130.

[0084] Here, "inner side" and "outer side" have the same meaning as "inner side" and "outer side" mentioned earlier, that is, the side facing the battery cell module is the inner side, and the side away from the battery cell module is the outer side. For the explosion-proof valve body 100, the structure located inside the substrate 130 is the inner structure part 110, and the structure located outside the substrate 130 is the outer structure part 120.

[0085] The substrate 130 can serve as a reference for setting the inner structural portion 110 and the outer structural portion 120. The substrate 130 can be as flat as possible to facilitate the setting of related structures on the substrate 130, such as the aforementioned first reinforcing rib 300, first structural portion 121 or second structural portion 122.

[0086] In some embodiments, please refer to Figures 3 and 4. The explosion-proof valve 20 also includes a waterproof and breathable membrane 400. The waterproof and breathable membrane 400 is a weak point in the explosion-proof valve 20. High-temperature gas can break through the waterproof and breathable membrane 400 to achieve the purpose of pressure relief.

[0087] The outer structural part 120 includes an outer boundary ring 124 and a mounting boss 125. The outer boundary ring 124 is connected to the substrate 130, and the mounting boss 125 is also connected to the substrate 130. The mounting boss 125 forms an opening 1251. A waterproof and breathable membrane 400 is connected to the mounting boss 125 and closes the opening 1251. A recessed area 123 is formed between the outer boundary ring 124 and the mounting boss 125. A first reinforcing rib 300 is connected between the outer boundary ring 124 and the mounting boss 125.

[0088] Based on the preceding text, it can be understood that the outer boundary ring 124 is the first structural part 121, and the mounting boss 125 is the second structural part 122. Here, the outer boundary ring 124 serves to enhance the structural strength at the edge of the outer structure, and the mounting boss 125 serves to provide an installation location for the waterproof and breathable membrane 400, and also to ensure the structural strength of the internal part of the outer structure. By connecting the first reinforcing rib 300 between the outer boundary ring 124 and the mounting boss 125, the structural strength of the outer structure can be enhanced.

[0089] It is understood that the outer boundary ring 124, the mounting boss 125, and the first reinforcing rib 300 can all be connected to the substrate 130 and protrude from the bottom wall. The specific heights of the outer boundary ring 124, the mounting boss 125, and the first reinforcing rib 300 protruding from the bottom wall can be set according to actual needs. For example, in some embodiments, referring to Figure 3, the mounting boss 125 and the outer boundary ring 124 have the same height, while the height of the first reinforcing rib 300 is lower than that of the mounting boss 125 and the outer boundary ring 124. Of course, the above height relationship can also be configured according to the specific structure of the mounting boss 125 and the outer boundary ring 124.

[0090] In some embodiments, referring to Figures 3 and 4, the mounting boss 125 includes a boss body 1252 and a supporting flange 1253. The boss body 1252 has the aforementioned opening 1251. The supporting flange 1253 is connected to the inner edge of the boss body 1252 and forms the opening 1251. A waterproof and breathable membrane 400 is disposed on the supporting flange 1253.

[0091] The support flange 1253 is formed on the boss body 1252 in a recessed manner, that is, the top of the support flange 1253 can be lower than the top of the boss body 1252, so that the waterproof and breathable membrane 400 can be restricted on the support flange 1253.

[0092] In some embodiments, referring to FIG4, the boss body 1252 includes a first boss 1252a and a second boss 1252b, the second boss 1252b being formed on the first boss 1252a and close to the opening 1251.

[0093] Understandably, the first reinforcing rib 300 can improve the connection strength between the outer boundary ring 124 and the mounting boss 125. The first reinforcing rib 300 can act as a force channel to transmit external impact force to the mounting boss 125. The parts of the mounting boss 125 that are far from the first reinforcing rib 300 have lower structural strength. For example, the support flange 1253 in the mounting boss 125 is far from the first reinforcing rib 300, and the structural strength of the support flange 1253 is weak. A waterproof and breathable membrane 400 also needs to be installed on the support flange 1253. To ensure the structural strength of the support flange 1253 and its surrounding parts, its thickness can be increased. Therefore, by configuring the boss body 1252 to include a first boss 1252a and a second boss 1252b, wherein the first boss 1252a is connected to the first reinforcing rib 300, and the second boss 1252b protrudes from the first boss 1252a and is close to the opening 1251, this structure can improve the balance of the structural strength of the outer structural part 120 of the explosion-proof valve body 100, so that the outer structural part 120 can maintain a balanced distribution of the overall structural strength while performing its respective functions.

[0094] In conjunction with the foregoing, the height of the second boss 1252b can be the same as the height of the outer boundary ring 124, the height of the first boss 1252a can be slightly lower than the second boss 1252b, and the height of the first reinforcing rib 300 can be the same as the first boss 1252a, or slightly lower than the first boss 1252a.

[0095] In some embodiments, referring to FIG4, the boss body 1252 is further provided with an outward protrusion 1252c on the side opposite to the support flange 1253. The outward protrusion 1252c is evenly spaced along the circumference, and the outward protrusion 1252c can further enhance the structural strength of the outer structural part 120.

[0096] In some specific embodiments, please refer to FIG4. The circumferential dimension of the protrusion 1252c can be designed based on the distance between two adjacent first reinforcing ribs 300. For example, the circumferential dimension of the protrusion 1252c can be the same as the distance between two adjacent first reinforcing ribs 300.

[0097] In some specific embodiments, please refer to Figure 4. The number of first reinforcing ribs 300 is a multiple of the number of protrusions 1252c. For example, the number of first reinforcing ribs 300 can be 2 times, 3 times, 4 times, etc., of the number of protrusions 1252c. In the example shown in Figure 4, the number of first reinforcing ribs 300 is 3 times that of protrusions 1252c, where the number of first reinforcing ribs 300 is 12 and the number of protrusions 1252c is 3.

[0098] In some embodiments, referring to FIG3, the explosion-proof valve 20 further includes a cover 500, which can be closed onto the explosion-proof valve body 100 to protect the waterproof and breathable membrane 400.

[0099] The cover 500 can be attached to the explosion-proof valve body 100 by adhesive or mechanical connection. The former can be achieved by strong adhesive, while the latter can be achieved by bolts or other connecting parts.

[0100] In some specific embodiments, please refer to Figures 3 and 4. A second snap-fit ​​structure 1241 is provided on the outer boundary ring 124, and the upper cover 500 is installed on the second snap-fit ​​structure 1241.

[0101] The second snap-fit ​​structure 1241 is a protrusion formed on the outer boundary ring 124, and a second snap 501 is formed on the upper cover 500. The protrusion can be snapped into the second snap 501 and fixed.

[0102] In the above embodiment, the structural strength of the outer structural part 120 can be improved by providing a first reinforcing rib 300 between the outer boundary ring 124 and the mounting boss 125. The height of the first reinforcing rib 300 can be set according to actual needs. As mentioned above, the mounting boss 125 in the outer structural part 120 needs to be fitted with a waterproof and breathable membrane 400. Therefore, the mounting boss 125 of the outer structural part 120 has high requirements for structural strength. In addition to the aforementioned method of setting the first boss 1252a and the second boss 1252b, the structural strength of the mounting boss 125 or the strength distribution of the outer structural part 120 can also be improved by setting the specific structure of the first reinforcing rib 300. For example, in the direction away from the substrate 130, i.e., in the height direction of the first reinforcing rib 300, the first reinforcing rib 300 can be designed as a variable diameter structure with a size decreasing from large to small. Of course, in other embodiments, the first reinforcing rib 300 may also be designed as a variable diameter structure with increasing size in the direction from the mounting boss 125 to the outer boundary ring 124, thereby improving the structural strength of the outer boundary ring 124.

[0103] Figure 6 shows a top view of an explosion-proof valve provided according to an embodiment of this application; Figure 7 shows a cross-sectional view along the AA direction in Figure 6; Figure 8 shows a partial enlarged view of part B in Figure 7.

[0104] In some embodiments, please refer to Figures 4 and 6 to 8. The thickness of the substrate 130 is T, which satisfies the condition: T = 2 mm to 4 mm.

[0105] Setting the thickness of the substrate 130 to the aforementioned dimensions ensures that the substrate 130 has high structural strength.

[0106] It is understandable that the thickness of the substrate 130 can be designed according to the overall size of the explosion-proof valve 20. When the overall size of the explosion-proof valve 20 is large, the thickness of the substrate 130 can be set to be larger, such as 4mm. When the overall size of the explosion-proof valve 20 is small, the thickness of the substrate 130 can be set to be smaller, such as 2mm.

[0107] In some embodiments, referring to FIG6, the width of the first reinforcing rib 300 gradually decreases in the direction from near the substrate 130 to away from the substrate 130.

[0108] The first reinforcing rib 300 has a wider width near the substrate 130, which makes the connection between the substrate 130 and the first reinforcing rib 300 have higher structural strength, thereby ensuring the structural strength of the inner structural part 110.

[0109] In some embodiments, referring to Figure 8, the width of the first reinforcing rib 300 connected to one end of the substrate 130 is t, and t satisfies the condition: t≤0.5T.

[0110] Setting t to the aforementioned dimensions ensures the connection strength between the first reinforcing rib 300 and the substrate 130. In some specific embodiments, t = 1 mm to 1.3 mm can improve the uniformity of the structural strength distribution between the first reinforcing rib 300 and the substrate 130.

[0111] In some embodiments, please refer to Figure 8, the side inclination angle of the first reinforcing rib 300 is θ, and θ satisfies the condition: θ≥0.5°.

[0112] The tilt angle can be understood as the draft angle of the first reinforcing rib 300. When the explosion-proof valve body 100 is manufactured by integral injection molding, setting the tilt angle to the above dimensions facilitates the removal of the explosion-proof valve body 100 from the mold and is also conducive to the uniform distribution of structural strength.

[0113] In some specific embodiments, θ satisfies the condition: θ = 0.6° to 0.8°, which can further improve the uniform distribution of structural strength.

[0114] In some embodiments, referring to Figure 8, the height of the first reinforcing rib 300 protruding from the substrate 130 is h, and h satisfies the condition: h≤3T. It can be understood that when T is 2mm, h≤6mm, and when T is 3mm, h≤9mm.

[0115] This allows for a reasonable configuration of the dimensions of the substrate 130 and the first reinforcing rib 300 in the height direction, enabling the height of the first reinforcing rib 300 and the thickness of the substrate 130 to match each other, resulting in a more reasonable strength distribution of the inner structural part 110.

[0116] In some embodiments, please refer to FIG8, an arc segment is formed between the first reinforcing rib 300 and the substrate 130, and the radius of the rounded corner of the arc segment is r, which satisfies the condition: 0.5T≥r≥0.25T.

[0117] The arc segment allows for a smooth transition between the first reinforcing rib 300 and the substrate 130, thereby improving the connection strength between them. Setting r to the aforementioned dimensions allows for a reasonable configuration of the transition between the first reinforcing rib 300 and the substrate 130 based on the thickness of the substrate 130, which can improve the uniform distribution of structural strength on the first reinforcing rib 300 and the substrate 130 while ensuring connection strength.

[0118] In some specific embodiments, r satisfies the condition: r = 0.5mm ~ 1mm.

[0119] In some embodiments, please refer to Figure 6. The distance between two adjacent first reinforcing ribs 300 is S, and S satisfies the condition: S≥2T.

[0120] Set S to the above dimensions and reasonably configure the number of first reinforcing ribs 300 according to the thickness of the substrate 130 to ensure the overall structural strength of the outer structural part 120 of the explosion-proof valve 20.

[0121] The above embodiments describe how the structural strength of the outer structural part 120 can be improved by setting the first reinforcing rib 300, thereby improving the structural strength of the explosion-proof valve 20. It is understood that the inner structural part 110 can also be set to improve the structural strength of the inner structural part 110, thereby further improving the structural strength of the explosion-proof valve 20.

[0122] In some embodiments, please refer to Figures 3 and 5. The inner structure portion 110 includes an inner ring structure 111, which is connected to the substrate 130. A first snap-fit ​​structure 200 is connected to the inner ring structure 111.

[0123] The inner ring structure 111 is the outer structure of the inner structure part 110. It and the aforementioned outer boundary ring 124 are placed on both sides of the base plate 130, which can ensure the structural strength of the explosion-proof valve body 100 on the inner and outer sides.

[0124] The radial width of the inner ring structure 111 can be designed to be relatively large, so that the first snap-fit ​​structure 200 can be reliably connected to the inner ring structure 111.

[0125] Based on the foregoing, it can be understood that the first snap-fit ​​structure 200 needs to be connected to the tray 10. Setting the inner ring structure 111 to have a larger radial width can improve the structural strength of the inner structure 110, so that the bonding force between the tray 10 and the first snap-fit ​​structure 200 can be shared by the inner ring structure 111.

[0126] In some embodiments, please refer to FIG5, the inner ring structure 111 includes an inner boundary ring 1111, a connecting ring 1112 and a sealing ring 1113. The inner boundary ring 1111 and the connecting ring 1112 can be arranged concentrically, and the sealing ring 1113 is connected between the inner boundary ring 1111 and the connecting ring 1112.

[0127] Here, the inner ring structure 111 is configured to include a sealing ring 1113, so that after the explosion-proof valve 20 is installed into the pressure relief hole 101, the sealing ring 1113 can abut against the periphery of the pressure relief hole 101, thereby forming a seal between the tray 10 and the explosion-proof valve 20.

[0128] Of course, for the inner ring structure 111 of the above overall structure, a sealing ring 1113 can be provided at the bottom of the inner ring structure 111 to achieve a seal between the tray 10 and the explosion-proof valve 20.

[0129] In some embodiments, referring to Figures 3 and 5, the first latching structure 200 includes a first latch 201, which can be connected to certain structures in the pressure relief hole 101, such as a limiting post (not shown) in the pressure relief hole 101. To improve reliability, the limiting post can pass through the first latch 201.

[0130] In some embodiments, the connecting ring 1112 protrudes outward from the position corresponding to the first bayonet 201 to form a receiving cavity 1112a, and the limiting post passing through the first bayonet 201 can be received in the receiving cavity 1112a.

[0131] In some embodiments, please refer to FIG5, the explosion-proof valve 20 further includes an anti-eccentricity structure 610, which is connected to the inner ring structure 111 and is arranged at intervals with the first snap-fit ​​structure 200.

[0132] Specifically, the first snap-fit ​​structure 200 and the anti-eccentricity structure 610 can be arranged on the same circumference, so that after the explosion-proof valve 20 is installed into the pressure relief hole 101, the first snap-fit ​​structure 200 and the anti-eccentricity structure 610 can act simultaneously on the protrusion in the pressure relief hole 101. Thus, the bonding force between the first snap-fit ​​structure 200 and the tray 10 can be distributed between the first snap-fit ​​structure 200 and the anti-eccentricity structure 610, which can prevent the first snap-fit ​​structure 200 from deforming due to excessive bonding force, thereby preventing the explosion-proof valve 20 from tilting in the pressure relief hole 101, so that the explosion-proof valve 20 can be reliably connected to the tray 10.

[0133] When setting the anti-eccentricity structure 610, an anti-eccentricity structure 610 can be set between two adjacent first snap-fit ​​structures 200, so that the first snap-fit ​​structure 200 and the anti-eccentricity structure 610 can evenly share the above-mentioned bonding force.

[0134] In some embodiments, referring to FIG6, in order to improve the structural strength of the inner structural portion 110, a second reinforcing rib 600 may be provided for the inner structural portion 110. The second reinforcing rib 600 may be connected to the inner ring structure 111 and the outer structural portion 120.

[0135] It is understandable that the second reinforcing rib 600 can form a force transmission between the inner structural part 110 and the outer structural part 120, and can improve the overall structural strength of the explosion-proof valve 20.

[0136] In some embodiments, the width of the second reinforcing rib 600 gradually decreases in the direction from near the inner ring structure 111 to away from the inner ring structure 111.

[0137] Please refer to Figure 6. The width of the second reinforcing rib 600 near the inner ring structure 111 is t1, and the width of the second reinforcing rib 600 away from the inner ring structure 111 is t2. t1 satisfies the condition: t1 = 3mm ~ 5mm, and t2 satisfies the condition: t2 = 0.5mm ~ 1mm.

[0138] By setting the dimensions of the second reinforcing rib 600 as described above, a balanced relationship can be formed with the first reinforcing rib 300. As mentioned above, the direction of the reduction in width of the first reinforcing rib 300 is opposite to the direction of the reduction in width of the second reinforcing rib 600. The connection between the second reinforcing rib 600 and the inner structural part 110 can form a force transmission between the inner structural part 110 and the outer structural part 120. Thus, for the explosion-proof valve body 100 as a whole, the structural strength of its inner and outer sides can be balanced.

[0139] The second reinforcing rib 600 can be configured to separate the aforementioned first snap-fit ​​structure 200 and anti-eccentricity structure 610, for example, the second reinforcing rib 600 can be disposed between the first snap-fit ​​structures 200. In some embodiments, the second reinforcing rib 600 can also be integrated with the anti-eccentricity structure 610, which will be described in detail in the following embodiments.

[0140] Please refer to Figures 3 and 6. The second reinforcing rib 600 includes an anti-eccentric structure 610 and a support part 620. The anti-eccentric structure 610 is connected to the inner ring structure 111 and is arranged at intervals with the first bayonet 201 structure. The support part 620 is connected to the anti-eccentric structure 610 and extends into the opening 1251.

[0141] As mentioned above, the width of the anti-eccentric structure 610 is t1, and the width of the support part 620 is t2. The support part 620 can provide auxiliary support for the waterproof and breathable membrane 400 and prevent the waterproof and breathable membrane 400 from detaching from the support flange 1253 due to collapse.

[0142] It is understood that in the above embodiments, the height of the anti-eccentric structure 610 can be the same as the height of the first snap-fit ​​structure 200 and both need to extend from the explosion-proof valve body 100 to form the protruding column structure mentioned above, so that the anti-eccentric structure 610 and the first snap-fit ​​structure 200 can extend into the pressure relief hole 101 and form a connection with the limiting column.

[0143] In some specific embodiments, please refer to FIG6. The anti-eccentric structure 610 includes an anti-eccentric column 611 and a connecting part 612. The anti-eccentric column 611 is connected to the inner ring structure 111, and the connecting part 612 is connected between the anti-eccentric column 611 and the support part 620. The connecting part 612 transitions from the anti-eccentric column 611 to the support part 620 from high to low.

[0144] It is understandable that the anti-eccentric column 611 can be connected to the limiting column in the pressure relief hole 101. The bonding force between the tray 10 and the explosion-proof valve 20 can be transmitted to the connecting part 612 and the support part 620 by the anti-eccentric column 611. Here, the connecting part 612 is set to a structure from high to low, which can make the above-mentioned bonding force more distributed on the connecting part 612, thereby ensuring the structural strength of the support part 620.

[0145] In some embodiments, referring to FIG6, there are multiple second reinforcing ribs 600, and the support portions 620 of the multiple second reinforcing ribs 600 intersect within the opening 1251.

[0146] The above configuration allows multiple second reinforcing ribs 600 to be connected as one unit, which can further improve the structural strength of the explosion-proof valve 20.

[0147] In the above embodiment of integrating the design of the second reinforcing rib 600, the explosion-proof valve 20 can be made more compact in structure. The second reinforcing rib 600 can improve the structural strength, assist in supporting the waterproof and breathable membrane 400, and prevent the explosion-proof valve 20 from tilting.

[0148] It should be noted that the relevant structures of the explosion-proof valve 20 in this application embodiment can be manufactured separately or as a whole. In addition to the embodiment described above where the anti-eccentric structure 610 can be integrated into the second reinforcing rib 600, the substrate 130, the first reinforcing rib 300, the outer boundary ring 124, the mounting boss 125, the inner ring structure 111, etc. can also be manufactured as a whole.

[0149] Furthermore, in the embodiments of this application, the relevant structures, such as the first structural part 121, the second structural part 122, the inner ring structure 111, and the outer boundary ring 124, can be designed as ring structures, and the first snap-fit ​​structure 200 and the anti-eccentric column 611 can be designed as arc structures.

[0150] In addition, the first reinforcing rib 300 and the second reinforcing rib 600 in this embodiment can be made of the same material as the main body of the explosion-proof valve 20. Specifically, PA66+25%GF can be used. The tensile strength of PA66+25%GF can reach 130MPa, the bending strength can reach 200MPa, and the cost is low. It can improve the structural strength of the explosion-proof valve 20 while controlling the cost.

[0151] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0152] In the description of this application, it should be understood that the terms "comprising" and "having" and any variations thereof used in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0153] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An explosion-proof valve (20), wherein, include: The explosion-proof valve body (100) includes an inner structural part (110) and an outer structural part (120); The first snap-fit ​​structure (200) is connected to the inner structural part (110); The outer structural portion (120) includes at least a first structural portion (121) and a second structural portion (122), a recessed region (123) is formed between the first structural portion (121) and the second structural portion (122), and the first reinforcing rib (300) is located in the recessed region (123) and connected to the first structural portion (121) and the second structural portion (122).

2. The explosion-proof valve (20) according to claim 1, wherein, The explosion-proof valve body (100) includes a base plate (130), the inner structural part (110) is formed on the inner side of the base plate (130), and the outer structural part (120) is formed on the outer side of the base plate (130).

3. The explosion-proof valve (20) according to claim 2, wherein, The explosion-proof valve (20) further includes a waterproof and breathable membrane (400), and the outer structural part (120) includes: An outer boundary ring (124) is connected to the substrate (130); A mounting boss (125) is connected to the substrate (130). The mounting boss (125) has an opening (1251). The waterproof and breathable membrane (400) is connected to the mounting boss (125) and closes the opening (1251). The recessed area (123) is formed between the outer boundary ring (124) and the mounting boss (125). The first reinforcing rib (300) is connected between the outer boundary ring (124) and the mounting boss (125).

4. The explosion-proof valve (20) according to claim 3, wherein, The mounting boss (125) includes: Boss body (1252); And a support flange (1253) connected to the inner edge of the boss body (1252), the support flange (1253) forming the opening (1251), and the waterproof and breathable membrane (400) disposed on the support flange (1253).

5. The explosion-proof valve (20) according to claim 4, wherein, The boss body (1252) includes: First protrusion (1252a); And a second boss (1252b), which protrudes from the first boss (1252a) and is close to the opening (1251).

6. The explosion-proof valve (20) according to claim 3, wherein, The explosion-proof valve (20) also includes a top cover (500), and a second snap-fit ​​structure (1241) is provided on the outer boundary ring (124). The top cover (500) is installed on the second snap-fit ​​structure (1241).

7. The explosion-proof valve (20) according to claim 1, wherein, The first reinforcing rib (300) is multiple and is arranged at intervals along the circumference in the recessed area (123).

8. The explosion-proof valve (20) according to any one of claims 2 to 7, wherein, The thickness of the substrate (130) is T, and T satisfies the condition: T = 2 mm ~ 4 mm.

9. The explosion-proof valve (20) according to claim 8, wherein, The width of the first reinforcing rib (300) gradually decreases in the direction from near the substrate (130) to away from the substrate (130).

10. The explosion-proof valve (20) according to claim 9, wherein, The width of the first reinforcing rib (300) connected to one end of the substrate (130) is t, and t satisfies the condition: t≤0.5T.

11. The explosion-proof valve (20) according to claim 10, wherein, The condition t satisfies the following expression: t = 1 mm ~ 1.3 mm.

12. The explosion-proof valve (20) according to claim 10, wherein, The inclination angle of the side of the first reinforcing rib (300) is θ, and θ satisfies the condition: θ≥0.5°.

13. The explosion-proof valve (20) according to claim 12, wherein, The given θ satisfies the condition: θ = 0.6°~0.8°.

14. The explosion-proof valve (20) according to claim 8, wherein, The height of the first reinforcing rib (300) protruding from the substrate (130) is h, and h satisfies the condition: h≤3T.

15. The explosion-proof valve (20) according to claim 8, wherein, An arc segment is formed between the first reinforcing rib (300) and the substrate (130), and the radius of the arc segment is r, which satisfies the condition: 0.5T≥r≥0.25T.

16. The explosion-proof valve (20) according to claim 15, wherein, The condition r satisfies the following equation: r = 0.5mm ~ 1mm.

17. The explosion-proof valve (20) according to claim 8, wherein, The distance between two adjacent first reinforcing ribs (300) is S, and S satisfies the condition: S≥2T.

18. The explosion-proof valve (20) according to claim 2, wherein, The inner structural part (110) includes: The inner ring structure (111) is connected to the substrate (130), and the first snap-fit ​​structure (200) is connected to the inner ring structure (111).

19. The explosion-proof valve (20) according to claim 18, wherein, The inner ring structure (111) includes: Inner boundary circle (1111); Connecting ring (1112); And a sealing ring (1113) connected between the inner boundary ring (1111) and the connecting ring (1112).

20. The explosion-proof valve (20) according to claim 19, wherein, The first snap-fit ​​structure (200) includes a first snap-fit ​​(201), and the connecting ring (1112) protrudes outward from the position corresponding to the first snap-fit ​​(201) to form a receiving cavity (1112a).

21. The explosion-proof valve (20) according to claim 18, wherein, The explosion-proof valve (20) also includes: An anti-eccentric structure (610) is connected to the inner ring structure (111), and the anti-eccentric structure (610) is arranged at intervals with the first snap-fit ​​structure (200).

22. The explosion-proof valve (20) according to claim 18, wherein, The explosion-proof valve (20) also includes: The second reinforcing rib (600) is connected to the inner ring structure (111) and the outer structure (120).

23. The explosion-proof valve (20) according to claim 22, wherein, The width of the second reinforcing rib (600) gradually decreases from the direction close to the inner ring structure (111) to the direction away from the inner ring structure (111).

24. The explosion-proof valve (20) according to claim 23, wherein, The width of the second reinforcing rib (600) near the inner ring structure (111) is t1, and the width of the second reinforcing rib (600) away from the inner ring structure (111) is t2. The t1 satisfies the condition: t1 = 3mm ~ 5mm, and the t2 satisfies the condition: t2 = 0.5mm ~ 1mm.

25. The explosion-proof valve (20) according to any one of claims 22 to 24, wherein, The outer structural portion (120) has an opening (1251), and the second reinforcing rib (600) includes: An anti-eccentric structure (610) is connected to the inner ring structure (111) and is spaced apart from the first snap-fit ​​structure (200); And a support (620), which is connected to the anti-eccentric structure (610) and extends into the opening (1251).

26. The explosion-proof valve (20) according to claim 25, wherein, There are multiple second reinforcing ribs (600), and the support portions (620) of the multiple second reinforcing ribs (600) intersect within the opening (1251).

27. A battery pack, wherein, Includes the explosion-proof valve (20) according to any one of claims 1 to 26.

28. An electrical appliance, wherein, Includes the battery pack as described in claim 27.

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