A new explosion-proof battery

Abstract

The present application relates to a new type of explosion-proof battery, comprising: a cover plate, the cover plate is provided with a through explosion-proof hole, the cover plate is recessed along the periphery of the explosion-proof hole to form a first step surface and a second step surface; an explosion-proof valve, the explosion-proof valve comprises a plane part, a meandering part and a mounting part arranged coaxially from inside to outside, the plane part and the meandering part are opposite to and shield the explosion-proof hole, the mounting part extends above the second step surface; and a riveting piece, the riveting piece has a through hole corresponding to the explosion-proof hole, the riveting piece is riveted and fixed with the first step surface, and the mounting part is clamped between the riveting piece and the second step surface to fix the explosion-proof valve. The present application can simplify the installation and fixation process of the explosion-proof valve, improve the assembly efficiency, and at the same time ensure the sealing reliability of the explosion-proof valve in the normal use state and the sensitive and stable opening in the overpressure state.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a novel explosion-proof battery. Background Technology

[0002] Battery casings typically have explosion-proof valves installed on the cover plates. These valves are designed to release pressure in case of excessive gas buildup due to abnormal conditions, preventing explosions or fires. Currently, explosion-proof valves are generally welded to the explosion-proof holes in the cover plate. However, this welding method is complex, requires strict control over welding parameters and the environment, and the heat input during welding can easily cause thermal deformation of the cover plate or the explosion-proof valve, affecting dimensional accuracy and sealing consistency. Furthermore, the welding process is time-consuming, reducing overall battery assembly efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a novel explosion-proof battery that simplifies the installation and fixing process of explosion-proof valves, improves assembly efficiency, and ensures the sealing reliability of explosion-proof valves under normal use conditions as well as their sensitive and stable opening under overpressure conditions.

[0004] A new type of explosion-proof battery includes: The cover plate has a through-hole explosion-proof hole, and the cover plate is recessed around the periphery of the explosion-proof hole to form a first stepped surface and a second stepped surface. An explosion-proof valve, comprising a flat portion, a meandering portion, and a mounting portion coaxially arranged from the inside out, wherein the flat portion and the meandering portion are opposite to and shield the explosion-proof orifice, and the mounting portion extends above the second stepped surface; and A riveting component having a through hole corresponding to the explosion-proof hole, the riveting component being riveted and fixed to the first stepped surface, and the mounting part being clamped between the riveting component and the second stepped surface to fix the explosion-proof valve.

[0005] In the above technical solution, the first and second stepped surfaces on the cover plate provide a precise positioning and installation foundation for the explosion-proof valve. The valve's mounting portion is securely clamped between the riveting component and the second stepped surface using a riveting fastener, achieving a mechanical fixed connection. This avoids the heat-affected zone, deformation risks, and complex operating procedures associated with traditional welding processes, improving battery assembly efficiency and yield. Simultaneously, the flat and meandering portions of the explosion-proof valve jointly shield the explosion-proof orifice. The meandering portion effectively accumulates internal battery pressure, ensuring a sealed state when the pressure does not reach a dangerous level. When the pressure exceeds a preset threshold, the orifice is opened promptly by breaking the meandering portion, thus balancing reliable sealing during normal use with rapid pressure relief safety under abnormal operating conditions.

[0006] Furthermore, the first stepped surface is provided with a riveting groove, and the lower end surface of the riveting component is provided with a riveting part, which is embedded into the riveting groove by a riveting process.

[0007] In the above technical solution, by setting a riveting groove on the first stepped surface and setting a corresponding riveting part on the lower end face of the riveting part, the riveting part is embedded into the riveting groove through the riveting process to form a mechanical interlocking structure. This embedded riveting fit not only enhances the connection strength and pull-out resistance between the riveting part and the cover plate, but also ensures that the mounting part is evenly and firmly pressed onto the second stepped surface during the riveting process. This effectively prevents the explosion-proof valve from loosening or shifting due to long-term vibration or pressure fluctuations, thereby improving the long-term reliability of the explosion-proof valve fixation and the overall structural stability of the battery.

[0008] Furthermore, the riveting groove is a dovetail groove.

[0009] In the above technical solution, the riveting groove is further defined as a dovetail groove structure. When the riveting part is embedded in the dovetail groove, the material of the riveting part fills the groove under the riveting pressure and forms an inverted buckle, which can enhance the interlocking force between the riveting part and the riveting groove, prevent the riveting part from coming out of the groove, and thus further improve the stability of the riveting fixation.

[0010] Furthermore, the meandering portion includes a first extension segment, a second extension segment, and an arc-shaped connecting segment connecting the two. The first extension segment is connected to the planar portion, and the second extension segment is connected to the mounting portion. The first extension segment, the second extension segment, and the arc-shaped connecting segment cooperate to form a cavity with an opening facing the inside of the battery.

[0011] In the above technical solution, the meandering part is composed of a first extension section, a second extension section, and an arc-shaped connecting section between the two. The first extension section is connected to the flat part, and the second extension section is connected to the mounting part. This structure allows the first extension section, the second extension section, and the arc-shaped connecting section to jointly enclose a cavity with an opening facing the inside of the battery. This cavity can effectively gather and guide the gas pressure generated inside the battery, so that the pressure is concentrated on the inner wall of the meandering part, ensuring that the explosion-proof valve can operate accurately under the preset pressure.

[0012] Furthermore, the length of the second extension segment is greater than the length of the first extension segment.

[0013] In the above technical solution, by setting the length of the second extension segment to be greater than the length of the first extension segment, the overall structure of the meandering part is asymmetrically distributed in the axial direction. This length difference makes the second extension segment have a larger stress area and deformation space than the first extension segment. When the internal pressure of the battery acts on the cavity, the longer second extension segment will bear greater tensile stress, thereby guiding deformation and fracture to occur preferentially in the second extension segment area, ensuring that the position and direction of the pressure relief opening are predictable.

[0014] Furthermore, the surface of the second extension section is provided with a fracture groove, which extends circumferentially along the second extension section.

[0015] In the above technical solution, a fracture groove extending circumferentially is provided on the surface of the second extension section. This fracture groove serves as a stress concentration point and can control the fracture position of the explosion-proof valve under overpressure conditions. When the internal pressure of the battery reaches a preset threshold, the stress will preferentially concentrate at the fracture groove, thereby causing the second extension section to fracture neatly at a predetermined position, achieving rapid and full exposure of the explosion-proof hole and ensuring that high-pressure gas can be released instantly.

[0016] Furthermore, a sealing ring is provided between the second stepped surface and the mounting portion.

[0017] In the above technical solution, a sealing ring is set between the second stepped surface and the mounting part, which can effectively fill the gap between the two, improve the sealing performance between the explosion-proof valve and the cover plate, prevent the internal electrolyte or gas from leaking from the edge of the mounting part during normal use of the battery, and also block external water vapor, dust and other contaminants from entering the battery. The sealing ring can be made of elastic material, which can ensure the seal without excessively hindering the contraction and disengagement of the mounting part when needed, thus taking into account both the sealing and pressure relief functions.

[0018] Furthermore, it also includes a baffle plate, wherein the upper end face of the riveting member is provided with a mounting groove, the baffle plate is attached to the mounting groove, and the through hole is covered.

[0019] In the above technical solution, a baffle is set and positioned and fitted using the mounting groove on the upper end face of the riveting part. The baffle covers the through hole and can protect the explosion-proof valve and explosion-proof hole from dust and foreign objects under normal use. At the same time, the baffle itself does not affect the opening action of the explosion-proof valve when the internal pressure rises. When the explosion-proof valve is detached, the baffle can be blown open by gas or released with pressure without blocking the pressure relief channel. Thus, it takes into account both the daily protection and emergency pressure relief needs of the battery. In addition, the mounting groove facilitates the quick positioning and assembly of the baffle.

[0020] Compared with existing technologies, the advantages of this invention are as follows: The first and second stepped surfaces on the cover plate provide a precise positioning and installation foundation for the explosion-proof valve. By using a riveting fastener to fix the valve to the first stepped surface, the mounting portion of the explosion-proof valve is securely clamped between the riveting fastener and the second stepped surface, achieving a mechanical fixed connection of the explosion-proof valve. This avoids the heat impact, deformation risks, and complex operating procedures associated with traditional welding processes, improving battery assembly efficiency and yield. Simultaneously, the flat and meandering portions of the explosion-proof valve jointly shield the explosion-proof orifice. The meandering portion effectively accumulates internal battery pressure, ensuring a sealed state when the pressure does not reach a dangerous level. When the pressure exceeds a preset threshold, the explosion-proof orifice is opened promptly by breaking the meandering portion, thus balancing reliable sealing during normal use with rapid pressure relief safety under abnormal operating conditions. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the novel explosion-proof battery according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the explosion-proof valve according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the cover plate and riveting components according to an embodiment of the present invention.

[0024] Explanation of icon numbers: Cover plate 1, explosion-proof hole 11, first stepped surface 12, riveting groove 121, second stepped surface 13, explosion-proof valve 2, flat part 21, meandering part 22, first extension section 221, second extension section 222, fracture groove 2221, arc-shaped connecting section 223, cavity 224, mounting part 23, riveting part 3, through hole 31, riveting part 32, mounting groove 33, sealing ring 4, baffle 5. Detailed Implementation

[0025] 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, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] Please refer to Figures 1 to 3In a preferred embodiment, the novel explosion-proof battery of the present invention mainly includes a cover plate 1, an explosion-proof valve 2, and a riveting member 3. The cover plate 1 has a through-hole explosion-proof hole 11, and a first stepped surface 12 and a second stepped surface 13 are recessed around the periphery of the explosion-proof hole 11. The explosion-proof valve 2 includes a flat portion 21, a meandering portion 22, and a mounting portion 23 coaxially arranged from the inside to the outside. The flat portion 21 and the meandering portion 22 are opposite to and cover the explosion-proof hole 11, and the mounting portion 23 extends above the second stepped surface 13. The riveting member 3 has a through hole 31 corresponding to the explosion-proof hole 11. The riveting member 3 is riveted and fixed to the first stepped surface 12, and the mounting portion 23 is clamped between the riveting member 3 and the second stepped surface 13 to fix the explosion-proof valve 2.

[0028] For example, the first stepped surface 12 is recessed relative to the upper surface of the cover plate 1, and the second stepped surface 13 is further recessed relative to the first stepped surface 12, that is, the recessed depth of the second stepped surface 13 is greater than the recessed depth of the first stepped surface 12, thereby forming a two-stage stepped structure. The explosion-proof hole 11 penetrates the central area of ​​the second stepped surface 13, and the second stepped surface 13 is used to provide support for the mounting part 23 of the explosion-proof valve 2 during installation.

[0029] The flat part 21 is a circular plate, and the meandering part 22 connects the flat part 21 and the mounting part 23, forming an annular corrugated structure. The mounting part 23 is an annular flat, with its inner edge connected to the meandering part 22 and its outer edge extending radially outward and covering the top of the second stepped surface 13. The axial thickness of the mounting part 23 is adapted to the sinking depth of the second stepped surface 13 to ensure that the riveting part 3 can press the mounting part 23 tightly after installation.

[0030] The riveting component 3 is a circular ring made of metal, the outer diameter of which matches the outer diameter of the first stepped surface 12, and the diameter of the through hole 31 matches the diameter of the explosion-proof hole 11. The thickness of the riveting component 3 matches the height of the first stepped surface 12 relative to the surface of the cover plate 1. Its lower end face fits against the upper surface of the mounting part 23, and its upper end face is flush with the upper surface of the cover plate 1 after riveting, thus forming a flat top surface of the battery.

[0031] The first stepped surface 12 and the second stepped surface 13 on the cover plate 1 provide a precise positioning and installation foundation for the explosion-proof valve 2. The mounting part 23 of the explosion-proof valve 2 is securely clamped between the riveting part 3 and the second stepped surface 13 by the riveting fastener 3 and the first stepped surface 12, achieving a mechanical fixed connection of the explosion-proof valve 2. This avoids the heat impact, deformation risk, and complex operation procedures associated with traditional welding processes, improving battery assembly efficiency and yield. Simultaneously, the flat part 21 and the meandering part 22 of the explosion-proof valve 2 jointly shield the explosion-proof hole 11. The meandering part 22 effectively accumulates internal battery pressure, ensuring a sealed state when the pressure does not reach a dangerous value. When the pressure exceeds a preset threshold, the explosion-proof hole 11 is opened promptly by the breakage of the meandering part 22, thus balancing reliable sealing during normal use with rapid pressure relief safety under abnormal operating conditions.

[0032] The first stepped surface 12 is provided with a riveting groove 121, and the lower end surface of the riveting part 3 is provided with a riveting part 32. The riveting part 32 is embedded into the riveting groove 121 by a riveting process.

[0033] For example, the riveting groove 121 is an annular groove surrounding the explosion-proof hole 11, with its opening facing upwards on the surface of the first stepped surface 12. The riveting part 32 is an annular protrusion protruding axially downwards from the lower end face of the riveting member 3. The cross-sectional shape of the annular protrusion matches the opening shape of the riveting groove 121, and its axial height is greater than the depth of the riveting groove 121 before riveting. During assembly, the riveting member 3 is placed above the mounting part 23, aligning the riveting part 32 with the riveting groove 121. Then, a downward pressure is applied to the riveting member 3 using a stamping tool, causing the riveting part 32 to deform and be squeezed into the riveting groove 121. At the same time, the lower end face of the riveting member 3 presses the mounting part 23 onto the second stepped surface 13, completing the riveting fixation.

[0034] By setting a riveting groove 121 on the first stepped surface 12 and a corresponding riveting part 32 on the lower end face of the riveting part 3, the riveting part 32 is embedded in the riveting groove 121 through the riveting process to form a mechanical interlocking structure. This embedded riveting fit not only enhances the connection strength and pull-out resistance between the riveting part 3 and the cover plate 1, but also ensures that the mounting part 23 is uniformly and firmly pressed onto the second stepped surface 13 during the riveting process, effectively preventing the explosion-proof valve 2 from loosening or shifting due to long-term vibration or pressure fluctuations, thereby improving the long-term reliability of the explosion-proof valve 2 fixation and the overall structural stability of the battery.

[0035] In this embodiment, the riveting groove 121 is a dovetail groove. By further defining the riveting groove 121 as a dovetail groove structure, when the riveting part 32 is inserted into the dovetail groove, the material of the riveting part 32 fills the groove under the riveting pressure and forms an undercut, which can enhance the interlocking force between the riveting part 32 and the riveting groove 121, prevent the riveting part 32 from coming out of the groove, and thus further improve the stability of the riveting fixation.

[0036] The meandering section 22 includes a first extension section 221, a second extension section 222, and an arc-shaped connecting section 223 connecting the two. The first extension section 221 is connected to the flat section 21, and the second extension section 222 is connected to the mounting section 23. The first extension section 221, the second extension section 222, and the arc-shaped connecting section 223 cooperate to form a cavity 224 with an opening facing the inside of the battery.

[0037] For example, the first extension segment 221 extends axially from the radial outer edge of the planar portion 21, and the second extension segment 222 extends axially from the radial inner edge of the mounting portion 23. An arc-shaped connecting segment 223 connects the ends of the first extension segment 221 and the second extension segment 222, and forms a smooth arc transition. The opening of the cavity 224 is located at the annular gap between the planar portion 21 and the mounting portion 23, and faces the inside of the battery, for collecting and accumulating gas pressure from inside the battery.

[0038] The meandering section 22 is composed of a first extension section 221, a second extension section 222, and an arc-shaped connecting section 223 between them. The first extension section 221 is connected to the flat section 21, and the second extension section 222 is connected to the mounting section 23. This structure allows the first extension section 221, the second extension section 222, and the arc-shaped connecting section 223 to jointly enclose a cavity 224 with an opening facing the inside of the battery. This cavity 224 can effectively gather and guide the gas pressure generated inside the battery, so that the pressure is concentrated on the inner wall surface of the meandering section 22, ensuring that the explosion-proof valve 2 can operate accurately under the preset pressure.

[0039] The length of the second extension 222 is greater than the length of the first extension 221. Specifically, measured axially, the distance from the end of the arc-shaped connecting section 223 to the inner edge of the mounting portion 23 of the second extension 222 is greater than the distance from the outer edge of the planar portion 21 to the arc-shaped connecting section 223 of the first extension 221. This causes the center of gravity of the meandering portion 22 to be biased towards the mounting portion 23, and the second extension 222 has a larger axial deformation stroke. When internal pressure acts on the cavity 224, the bending moment and tensile stress borne by the second extension 222 are significantly greater than those of the first extension 221, thereby causing deformation and fracture behavior to preferentially occur in the region of the second extension 222.

[0040] By setting the length of the second extension 222 to be greater than that of the first extension 221, the overall structure of the meandering portion 22 is asymmetrically distributed in the axial direction. This length difference makes the second extension 222 have a larger stress area and deformation space than the first extension 221. When the internal pressure of the battery acts on the cavity 224, the longer second extension 222 will bear greater tensile stress, thereby guiding deformation and fracture to occur preferentially in the area of ​​the second extension 222, ensuring that the position and direction of the pressure relief opening are predictable.

[0041] The surface of the second extension 222 is provided with a fracture groove 2221, which extends circumferentially along the second extension 222.

[0042] For example, a fracture groove 2221 is formed on the outer surface of the second extension 222 to facilitate machining. The cross-section of the fracture groove 2221 is V-shaped or U-shaped, and the minimum wall thickness at the bottom of the groove is less than the wall thickness of other parts of the second extension 222, thereby forming a stress concentration area at that location. The fracture groove 2221 is provided at one end of the second extension 222 near the mounting portion 23, and extends continuously along the entire circumference to form a closed loop, ensuring that cracking occurs simultaneously along the entire circumference upon fracture.

[0043] A fracture groove 2221 extending circumferentially is provided on the surface of the second extension section 222. The fracture groove 2221 serves as a stress concentration point and can control the fracture position of the explosion-proof valve 2 under overpressure conditions. When the internal pressure of the battery reaches a preset threshold, the stress will preferentially concentrate at the fracture groove 2221, thereby causing the second extension section 222 to fracture neatly at a predetermined position, realizing the rapid and full exposure of the explosion-proof hole 11, and ensuring that the high-pressure gas can be released instantly.

[0044] A sealing ring 4 is provided between the second stepped surface 13 and the mounting portion 23. For example, the sealing ring 4 is annular and made of an elastomeric material (such as fluororubber) resistant to electrolyte corrosion. The sealing ring 4 is fitted under the mounting portion 23 of the explosion-proof valve 2, with its inner diameter larger than the outer diameter of the meandering portion 22 and its outer diameter smaller than or equal to the outer diameter of the mounting portion 23. Before riveting, the sealing ring 4 is pre-placed on the surface of the second stepped surface 13 and coaxially arranged with the riveting groove 121. When the riveting member 3 is pressed down, the mounting portion 23 compresses the sealing ring 4, causing it to deform and tightly fill the tiny gap between the lower surface of the mounting portion 23 and the second stepped surface 13, forming a continuous circumferential sealing band.

[0045] A sealing ring 4 is provided between the second stepped surface 13 and the mounting part 23, which can effectively fill the gap between the two, improve the sealing performance between the explosion-proof valve 2 and the cover plate 1, prevent the internal electrolyte or gas from leaking from the edge of the mounting part 23 during normal use of the battery, and also block external water vapor, dust and other contaminants from entering the battery. The sealing ring 4 can be made of elastic material, which can ensure the seal without excessively hindering the mounting part 23 from shrinking and disengaging when needed, thus taking into account both the sealing and pressure relief functions.

[0046] The novel explosion-proof battery of this application also includes a baffle 5. The upper end face of the rivet 3 is provided with a mounting groove 33. The baffle 5 is attached to the mounting groove 33 and covers the through hole 31.

[0047] Specifically, the mounting groove 33 is a recessed groove formed around the through hole 31 on the upper surface of the riveting part 3. Its depth is equal to the thickness of the baffle 5, ensuring that the baffle 5 does not protrude above the upper surface of the riveting part 3 after installation. The baffle 5 is a thin sheet whose outer contour matches the contour of the mounting groove 33. It is made of metal foil or plastic film to maintain rigidity or toughness under normal conditions, while being easily lifted or broken by internal gas impact. The baffle 5 is fixed in the mounting groove 33 by adhesive bonding. The central area of ​​the baffle 5 is opposite to the through hole 31, completely covering the upper end of the through hole 31, thereby preventing foreign objects from falling into the through hole 31 and contacting the explosion-proof valve 2.

[0048] The baffle 5 is set and positioned and attached using the mounting groove 33 on the upper end face of the rivet 3. The baffle 5 covers the through hole 31 and can protect the explosion-proof valve 2 and the explosion-proof hole 11 from dust and foreign objects under normal use. At the same time, the baffle 5 itself does not affect the opening action of the explosion-proof valve 2 when the internal pressure increases. When the explosion-proof valve 2 is detached, the baffle 5 can be blown open by gas or released with pressure without blocking the pressure relief channel. Thus, it takes into account both the daily protection and emergency pressure relief needs of the battery. In addition, the mounting groove 33 facilitates the quick positioning and assembly of the baffle 5.

[0049] In the description of this invention, it should be understood that terms such as "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0050] Furthermore, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel explosion-proof battery, characterized in that, include: The cover plate has a through-hole explosion-proof hole, and the cover plate is recessed around the periphery of the explosion-proof hole to form a first stepped surface and a second stepped surface. An explosion-proof valve includes a flat portion, a meandering portion, and a mounting portion arranged coaxially from the inside to the outside. The flat portion and the meandering portion are opposite to and cover the explosion-proof hole. The mounting portion extends above the second stepped surface. as well as A riveting component having a through hole corresponding to the explosion-proof hole, the riveting component being riveted and fixed to the first stepped surface, and the mounting part being clamped between the riveting component and the second stepped surface to fix the explosion-proof valve.

2. The novel explosion-proof battery according to claim 1, characterized in that, The first stepped surface is provided with a riveting groove, and the lower end surface of the riveting component is provided with a riveting part, which is embedded into the riveting groove by a riveting process.

3. The novel explosion-proof battery according to claim 2, characterized in that, The riveting groove is a dovetail groove.

4. The novel explosion-proof battery according to claim 1, characterized in that, The meandering portion includes a first extension section, a second extension section, and an arc-shaped connecting section connecting the two. The first extension section is connected to the planar portion, and the second extension section is connected to the mounting portion. The first extension section, the second extension section, and the arc-shaped connecting section cooperate to form a cavity with an opening facing the inside of the battery.

5. The novel explosion-proof battery according to claim 4, characterized in that, The length of the second extension segment is greater than the length of the first extension segment.

6. The novel explosion-proof battery according to claim 4, characterized in that, The surface of the second extension is provided with a fracture groove, which extends circumferentially along the second extension.

7. The novel explosion-proof battery according to claim 1, characterized in that, A sealing ring is provided between the second stepped surface and the mounting part.

8. The novel explosion-proof battery according to claim 1, characterized in that, It also includes a baffle plate, and the upper end face of the riveting member is provided with a mounting groove. The baffle plate is attached to the mounting groove and covers the through hole.

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