sealing pegs

Abstract

This invention provides a sealing pin for sealing the electrolyte filling hole of a battery. The sealing pin includes a deformable component and an elastic component. The deformable component expands in response to an increase in temperature. The elastic component is connected to the deformable component. When the deformable component expands, it allows the elastic component to abut against the wall of the electrolyte filling hole, thereby sealing the hole. This invention, by combining the deformable component and the elastic component to form the sealing pin, allows the sealing pin to be inserted into the electrolyte filling hole with a smaller size, reducing the difficulty of installation and the probability of cell damage. Furthermore, the expansion of the deformable component in response to an increase in temperature causes the entire sealing pin to expand, thus achieving a seal on the electrolyte filling hole, resulting in high sealing reliability.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a sealing nail. Background Technology

[0002] During the manufacturing process of lithium-ion batteries, after the lithium-ion battery has been filled with electrolyte but before it has been sealed, it is essential to ensure that the filling hole is properly sealed to prevent moisture from the air from entering the battery.

[0003] One related technology provides a sealing granule, slightly larger than the injection hole, which seals the injection port through an interference fit. However, this design makes the sealing granule difficult to install and can easily damage the lithium-ion battery. Utility Model Content

[0004] The embodiments of this utility model provide a sealing nail that can improve the technical problem of difficult installation of sealing nails in related technologies.

[0005] An embodiment of this utility model provides a sealing pin for sealing the electrolyte filling hole of a battery, the sealing pin comprising:

[0006] A deformable component that expands in response to an increase in temperature; and,

[0007] An elastic element is connected to the deformable element. When the deformable element expands, it allows the elastic element to abut against the wall of the injection hole, thereby sealing the injection hole.

[0008] In one embodiment, the elastic element is disposed around the deformable element.

[0009] By setting the elastic element to surround the deformable element, the elastic element can make full use of the expansion of the deformable element. The deformable element applies outward pressure to the elastic element in the circumferential direction, and the elastic element also expands in the circumferential direction, thus abutting against the hole wall of the injection hole in all directions, thereby achieving a complete seal of the injection hole and further improving the sealing effect of the sealing nail.

[0010] In one embodiment, the elastic element includes:

[0011] A sealing portion, the sealing portion being used to seal the injection hole; and,

[0012] A guide portion is connected to the sealing portion. Along the direction away from the sealing portion, the cross-sectional area of ​​the guide portion gradually decreases to guide the sealing pin through the injection hole.

[0013] By incorporating a guide portion with a thinner end, the thinner end of the guide portion can be inserted more easily into the injection hole during the insertion of the sealing pin. This guides the subsequent part of the sealing pin through the injection hole, reducing the difficulty of fitting the sealing pin to the injection hole without affecting the sealing effect, and improving the efficiency of sealing the injection hole.

[0014] In one embodiment, the deformable element is at least partially disposed within the sealing portion.

[0015] By at least partially placing the deformable component within the sealing portion, and inserting the sealing pin into the injection hole and placing it in a high-temperature environment, the expanding deformable component will directly cause the sealing portion to expand, thereby achieving a seal on the injection hole.

[0016] In one embodiment, the deformable element is at least partially disposed within the guide portion.

[0017] By providing at least a partially deformable part within the guide section, both the sealing part and the guide section will expand to a certain extent when the deformable part expands, thus avoiding the situation where only the sealing part expands and cracks appear between the sealing part and the guide section, thereby improving the service life of the sealing nail.

[0018] In one embodiment, the end of the guide portion away from the sealing portion is provided with a chamfer.

[0019] By setting a chamfer at the end of the guide portion away from the sealing portion, when the sealing pin is inserted into the injection hole, the injection hole first contacts the chamfer on the guide portion. Since the chamfer surface is usually an inclined surface or a curved surface, the chamfer surface can also play a certain guiding role, thereby increasing the probability of the sealing pin being successfully inserted into the injection hole.

[0020] In one embodiment, the ratio of the size of the deformable element to the size of the sealing pin along the radial direction of the sealing pin is greater than or equal to 0.5 and less than or equal to 0.95.

[0021] By limiting the ratio of the size of the deformable part to the size of the sealing nail to a suitable range, it is possible to ensure that the deformable part can generate sufficient deformation after being heated to complete the sealing of the injection hole, and also to reduce the probability that the elastic part cannot recover under the influence of the deformable part, thereby improving the service life of the sealing nail.

[0022] In one embodiment, the size of the deformable element is greater than or equal to 0.5 mm and less than or equal to 5 mm along the radial direction of the sealing pin.

[0023] By limiting the radial dimension of the deformable part to a suitable range, the diameter of the sealing pin is kept within a suitable range, which ensures that the injection hole of most models is sealed, and the sealing pin will not be too large to be difficult to insert into the injection hole.

[0024] In one embodiment, the length of the deformable element is greater than or equal to 1 mm along the axial direction of the sealing pin.

[0025] By limiting the size of the deformable part along the axial direction of the sealing pin to a suitable range, the deformable part can drive a sufficiently large elastic part, thereby ensuring that the elastic part has sufficient contact area with the wall of the injection hole, ensuring the sealing effect, while the deformable part does not interfere with the internal components of the battery cell.

[0026] In one embodiment, the deformable member is detachably connected to the elastic member.

[0027] By using a detachable connection to connect the deformable and elastic components, when the deformable components experience wear and aging due to frequent use, or when the elastic components experience sealing failure, the damaged parts can be quickly disassembled and replaced without replacing the entire component, thus reducing maintenance costs and time.

[0028] In one embodiment, the deformable member has an external thread on its outer periphery, and the elastic member has an internal threaded hole corresponding to the external thread, the external thread and the internal threaded hole forming a threaded engagement; or,

[0029] The deformable part has a protrusion on its outer periphery, and the deformable part is interference-fitted with the elastic part through the protrusion.

[0030] The engagement of the external thread and the internal threaded hole provides reliable connection strength and sealing, ensuring a tight fit between the deformable and elastic components, and facilitating easy assembly and disassembly. The interference fit between the protrusion on the deformable component and the elastic component allows for rapid assembly of the sealing pin without the need for auxiliary tools; the deformable component is secured solely by the clamping force generated by the deformation of the elastic component itself. This results in a simple, compact structure and low manufacturing cost.

[0031] The beneficial effects of the embodiments of this utility model are as follows:

[0032] In the embodiments of this utility model, the sealing nail is made by combining a deformable part and an elastic part, so that the sealing nail can be inserted into the injection hole with a small size, reducing the difficulty of sealing nail installation and the probability of cell damage. Then, by utilizing the characteristic of the deformable part to expand in response to the increase of temperature, the sealing nail expands as a whole to seal the injection hole, thus achieving high sealing reliability. Moreover, since the elastic part itself has a certain degree of elasticity, the contact area between the sealing nail and the hole wall increases continuously during the process of squeezing the hole wall, thereby distributing pressure more evenly, effectively preventing moisture intrusion, further improving the sealing effect and reducing damage to the injection hole. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a cross-sectional view of the sealing nail provided in an embodiment of this utility model;

[0035] Figure 2 This is a schematic diagram of the sealing nail provided in an embodiment of the present invention;

[0036] Figure 3 This is a cross-sectional view of another sealing nail provided in an embodiment of this utility model;

[0037] Figure 4 This is a cross-sectional view of another sealing nail provided in an embodiment of this utility model;

[0038] Figure 5 This is a cross-sectional view of another sealing nail provided in an embodiment of the present invention.

[0039] The labels in the diagram are as follows:

[0040] 1. Sealing nails;

[0041] 11. Deformable part; 111. Protrusion; 12. Elastic part; 121. Sealing part; 122. Guide part;

[0042] H1, the radial direction of the sealing pin;

[0043] H2, Axial direction of the sealing pin. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0045] Reference Figure 1This utility model provides a sealing nail 1 for sealing the electrolyte filling hole of a battery. The sealing nail 1 includes a deformable member 11 and an elastic member 12. The deformable member 11 can expand in response to an increase in temperature. The elastic member 12 is connected to the deformable member 11. When the deformable member 11 expands, the deformable member 11 can cause the elastic member 12 to abut against the hole wall of the electrolyte filling hole, thereby sealing the electrolyte filling hole.

[0046] In this embodiment, the elastic element 12 is made of an elastic material. Since elastic materials typically possess a certain degree of flexibility and resilience, they can undergo significant deformation under the thrust of the deformable element 11, thus tightly fitting the wall of the injection hole and ensuring easy disassembly of the sealing pin 1 after cooling. For example, silicone rubber can be used to make the elastic element 12. Silicone rubber's excellent resistance to high and low temperatures allows the elastic element 12 to adapt well to temperature changes during heating and sealing and cooling disassembly processes. Simultaneously, the good chemical stability of silicone rubber can resist corrosion from the battery's internal electrolyte, preventing aging of the elastic element 12 and subsequent sealing failure. The elastic element 12 may include at least one of the following: fluororubber, natural rubber, styrene-butadiene rubber, silicone rubber, polyurethane, polyetheretherketone, polytetrafluoroethylene, and nylon.

[0047] The deformable component 11 is a structural component that expands with increasing temperature, such as metal or plastic. The deformable component 11 and the elastic component 12 can be non-detachably connected by welding, bonding, or other methods, making the connection between them tighter; alternatively, the deformable component 11 and the elastic component 12 can be detachably connected by snap-fit, magnetic connection, or other methods, facilitating replacement and cleaning. This embodiment of the invention does not limit the scope of these connections. The deformable component 11 may include at least one of the following: nickel, titanium, copper, iron, zinc, aluminum, manganese, and niobium.

[0048] In some alternative embodiments, the deformable element 11 is a spiral shape memory alloy wire, which is threaded inside the elastic element 12, thereby tightly connecting with the elastic element 12. The shape memory alloy wire is in a contracted state at room temperature, but when heated, it expands uniformly in the radial direction, pushing the elastic element 12 to expand outward, thereby sealing the injection hole.

[0049] In practical use, firstly, insert the sealing pin 1, slightly smaller than the injection hole, into the injection hole. Then, place the battery cell in a high-temperature environment, causing the deformable part 11 to expand due to heat and compress the elastic part 12. This causes the elastic part 12 to press against the wall of the injection hole and fit tightly against it, forming a reliable sealing surface that effectively prevents external moisture or impurities from entering the battery cell. When it is necessary to remove the sealing pin 1, the battery cell can be placed in a low-temperature environment to cool it down, causing the deformable part 11 to shrink back to its original shape. This reduces the friction between the elastic part 12 and the wall of the injection hole, making the removal of the sealing pin 1 easier and more convenient, and reducing the probability of damage to the battery cell during disassembly.

[0050] This embodiment of the invention manufactures a sealing nail 1 by combining a deformable element 11 with an elastic element 12. This allows the sealing nail 1 to be inserted into the injection hole with a small size, reducing the difficulty of installing the sealing nail 1 and the probability of damage to the battery cell. Subsequently, due to the expansion characteristic of the deformable element 11 in response to the increase in temperature, the sealing nail 1 expands as a whole to seal the injection hole, resulting in high sealing reliability. Furthermore, since the elastic element 12 itself has a certain degree of elasticity, the contact area between the sealing nail 1 and the hole wall increases continuously during the compression process, thereby distributing pressure more evenly and effectively preventing moisture intrusion, further improving the sealing effect and reducing damage to the injection hole.

[0051] In one embodiment, reference is made to Figure 1 The elastic element 12 is arranged around the deformable element 11.

[0052] The elastic element 12 is arranged around the deformable element 11, which can make full use of the expansion of the deformable element 11, so that the deformable element 11 applies outward pressure to the elastic element 12 in the circumferential direction. The elastic element 12 also expands in the circumferential direction, and then abuts against the hole wall of the injection hole in all directions, thereby achieving a complete seal of the injection hole and further improving the sealing effect of the sealing nail 1.

[0053] In some optional embodiments, the elastic element 12 is a hollow cylindrical silicone rubber ring, and the deformable element 11 is a cylindrical resin rod. The inner wall of the silicone rubber ring and the outer wall of the resin rod are tightly fitted together, and the two are coaxially nested to form the sealing nail 1. After the liquid injection is completed, the sealing nail 1 is inserted into the injection hole as a whole. At room temperature, there is a small gap between the silicone rubber and the hole wall of the injection hole. When the sealing nail 1 is heated, the resin rod expands uniformly in the radial direction, pushing the silicone rubber ring to expand outward, so that the outer wall of the silicone rubber tightly abuts against the hole wall of the injection hole, thereby achieving a seal on the injection hole. The cylindrically symmetrically arranged sealing nail 1 has a simple structure, is easy to assemble, and has a low manufacturing difficulty; at the same time, the cylindrically symmetrical structure can ensure that the hole wall of the injection hole is subjected to uniform force, forming a complete sealing surface in the circumferential direction, which can effectively prevent water vapor and dust from entering.

[0054] In some alternative embodiments, the elastic element 12 may also include multiple annular silicone sheets that circumferentially surround the outer side of the deformable element 11. The size of the sealing pin 1 can be adjusted by changing the number of silicone sheets, allowing the sealing pin 1 to adapt to injection holes of various sizes and improving its applicability.

[0055] In one embodiment, reference is made to Figure 2 The elastic member 12 includes a sealing part 121 and a guide part 122. The sealing part 121 is used to seal the injection hole. The guide part 122 is connected to the sealing part 121. Along the direction of the guide part 122 away from the sealing part 121, the cross-sectional area of ​​the guide part 122 gradually decreases so as to guide the sealing nail 1 to pass through the injection hole.

[0056] The sealing part 121 and the guiding part 122 can be connected by integral molding. For example, the guiding part 122 and the sealing part 121 can be integrally molded by processes such as injection molding or stamping. The resulting elastic part 12 has no obvious seams, high structural strength, and good sealing performance. The sealing part 121 and the guiding part 122 can also be detachably connected by means of threads, snaps, etc., which facilitates maintenance and replacement of parts. The sealing part 121 and the guiding part 122 can also be non-detachably connected by means of welding, bonding, etc., resulting in a tighter connection and a longer service life.

[0057] The guide part 122 is used to guide the sealing nail 1 through the injection hole. Therefore, the guide part 122 is usually set as a cone or frustum shape. The thinner end of the guide part 122 faces the injection hole, so that when the sealing nail 1 is inserted into the injection hole, the thinner end is inserted into the injection hole first. Since the size of the thinner end is small, even if there is a deviation in the position between the sealing nail 1 and the injection hole, it will not affect the insertion of the guide part 122 into the injection hole, thereby compensating for the position of the sealing nail 1, ensuring that the sealing part 121 can also be smoothly inserted into the injection hole and finally achieve the sealing of the injection hole.

[0058] By providing a guide portion 122 with a thinner end, the thinner end of the guide portion 122 can be inserted into the injection hole more easily during the insertion of the sealing nail 1, thereby guiding the subsequent part of the sealing nail 1 through the injection hole. Without affecting the sealing effect of the sealing nail 1, the difficulty of matching the sealing nail 1 with the injection hole is reduced, and the efficiency of sealing the injection hole is improved.

[0059] In one embodiment, reference is made to Figure 3The deformable member 11 is at least partially disposed within the sealing portion 121. In this embodiment of the present invention, the deformable member 11 can be completely disposed within the sealing portion 121. In this case, when the sealing nail 1 is inserted into the injection hole and placed in a high-temperature environment, the expanding deformable member 11 will only directly drive the sealing portion 121 to expand and achieve sealing of the injection hole. Since the deformable member 11 is not disposed within the guide portion 122, the deformation of the guide portion 122 may be small, thereby reducing the probability that the guide portion 122 will become too large in volume during long-term use, thus ensuring that the guide portion 122 has a better guiding effect.

[0060] In one embodiment, reference is made to Figure 4 The deformable member 11 is at least partially disposed within the guide portion 122. In this embodiment of the present invention, at least a portion of the deformable member 11 is disposed within both the sealing portion 121 and the guide portion 122, such that when the deformable member 11 expands, both the sealing portion 121 and the guide portion 122 will expand to a certain extent, avoiding the situation where only the sealing portion 121 expands, resulting in cracks between the sealing portion 121 and the guide portion 122, thereby improving the service life of the sealing nail 1.

[0061] In one embodiment, the end of the guide portion 122 away from the sealing portion 121 is provided with a chamfer.

[0062] In this embodiment of the invention, a chamfer is provided at the end of the guide portion 122 away from the sealing portion 121. This ensures that when the sealing pin 1 is inserted into the injection hole, the injection hole first contacts the chamfer on the guide portion 122. Since the chamfer surface is typically an inclined or curved surface, it also provides a guiding effect, thereby increasing the probability of the sealing pin 1 being smoothly inserted into the injection hole. Furthermore, when the chamfer surface collides with the injection hole, it disperses the force generated by the collision between the sealing pin 1 and the injection hole, thus reducing the probability of damage to the sealing pin 1 or the injection hole.

[0063] In one embodiment, along the radial direction H1 of the sealing pin, the ratio of the size of the deformable member 11 to the size of the sealing pin 1 is greater than or equal to 0.5 and less than or equal to 0.95.

[0064] Along the radial direction H1 of the sealing nail, if the ratio of the size of the deformable part 11 to the size of the sealing nail 1 is less than 0.5, then the size of the deformable part 11 is too small. Even if the sealing nail 1 is placed in a high-temperature environment, the deformation of the deformable part 11 will be small, resulting in a poor sealing effect of the sealing nail 1 on the injection hole, which is prone to sealing failure. Along the radial direction H1 of the sealing nail, if the ratio of the size of the deformable part 11 to the size of the sealing nail 1 is greater than 0.95, then the size of the deformable part 11 is too large, while the size of the elastic part 12 is too small. When the deformable part 11 expands due to heat, the elastic part 12 expands outward accordingly, which may lead to excessive expansion of the elastic part 12, making it unable to return to its original shape, or even causing it to rupture.

[0065] Therefore, in this embodiment of the invention, the ratio of the size of the deformable part 11 to the size of the sealing nail 1 is set to be greater than or equal to 0.5 and less than or equal to 0.95. For example, the ratio can be 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, etc., thereby ensuring that the deformable part 11 can generate sufficient deformation after being heated to complete the sealing of the injection hole, and also reducing the probability that the elastic part 12 cannot recover under the influence of the deformable part 11, thus improving the service life of the sealing nail 1.

[0066] In one embodiment, along the radial direction H1 of the sealing pin, the size of the deformable member 11 is greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0067] If the size of the deformable part 11 along the radial direction H1 of the sealing nail is less than 0.5mm, the size of the deformable part 11 is too small, resulting in a small overall size of the sealing nail 1, making it difficult to achieve a good sealing effect through the expansion of the deformable part 11; if the size of the deformable part 11 along the radial direction H1 of the sealing nail is greater than 5mm, the overall size of the sealing nail 1 is too large, making it difficult to insert into the injection hole and easily causing interference with the battery cell.

[0068] Therefore, in this embodiment of the utility model, the size of the deformable part 11 along the radial direction H1 of the sealing nail is set to be greater than or equal to 0.5 mm and less than or equal to 5 mm. For example, it can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc., so that the diameter of the sealing nail 1 is kept within a suitable range, which can ensure that the injection hole of most models is sealed, and will not make it difficult to insert the sealing nail 1 into the injection hole due to excessive size.

[0069] In one embodiment, the length of the deformable member 11 along the axial direction H2 of the sealing pin is greater than or equal to 1 mm.

[0070] If the size of the deformable part 11 along the radial direction of the sealing pin 1 is less than 1 mm, the deformable part 11 is too small, which can lead to an insufficient contact area between the elastic element 12 and the wall of the injection hole, thereby reducing the sealing effect. Therefore, in this embodiment of the invention, the size of the deformable part 11 along the radial direction of the sealing pin 1 is set to be greater than 1 mm and less than or equal to 5 mm, so that the deformable part 11 can drive the elastic element 12 of a sufficient size, thereby ensuring that the elastic element 12 has a sufficient contact area with the wall of the injection hole, ensuring the sealing effect, while the deformable part 11 does not interfere with the internal components of the battery cell.

[0071] In one embodiment, the deformable member 11 and the elastic member 12 are detachably connected. The detachable connection between the deformable member 11 and the elastic member 12 can be achieved through threaded connection, snap-fit ​​connection, magnetic connection, interference fit, or other means.

[0072] By employing a detachable connection between the deformable component 11 and the elastic component 12, when the deformable component 11 experiences wear and aging due to frequent use, or when the elastic component 12 experiences sealing failure, the damaged parts can be quickly disassembled and replaced without requiring complete replacement, thus reducing maintenance costs and time. Furthermore, different specifications and materials of the deformable component 11 or the elastic component 12 can be quickly replaced according to different sealing requirements, meeting diverse application scenarios. The detachable design also allows the deformable component 11 and the elastic component 12 to be separated and recycled at the end of their service life, improving material utilization and reducing resource waste.

[0073] In one embodiment, the deformable member 11 has an external thread on its outer periphery, and the elastic member 12 has an internal threaded hole corresponding to the external thread, with the external thread and the internal threaded hole forming a threaded engagement; or,

[0074] Reference Figure 5 The outer periphery of the deformable part 11 is provided with a protrusion 111, and the deformable part 11 is interference-fitted with the elastic part 12 through the protrusion 111.

[0075] The engagement of the external thread and the internal thread hole provides reliable connection strength and sealing, ensuring a tight fit between the deformable part 11 and the elastic part 12. Furthermore, the assembly and disassembly of the deformable part 11 and the elastic part 12 are relatively convenient. The interference fit between the protrusion 111 on the deformable part 11 and the elastic part 12 allows for rapid assembly of the sealing nail 1 without the need for auxiliary tools. The deformable part 11 is fixed solely by the clamping force generated by the deformation of the elastic part 12 itself. This results in a simple, compact structure and low manufacturing cost.

[0076] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A sealing pin for sealing the electrolyte filling hole of a battery, characterized in that, The sealing pin includes: A deformable component that expands in response to an increase in temperature; and, An elastic element is connected to the deformable element. When the deformable element expands, it allows the elastic element to abut against the wall of the injection hole, thereby sealing the injection hole.

2. The sealing nail according to claim 1, characterized in that, The elastic element is arranged around the deformable element.

3. The sealing nail according to claim 1, characterized in that, The elastic element includes: A sealing portion, the sealing portion being used to seal the injection hole; and, A guide portion is connected to the sealing portion. Along the direction away from the sealing portion, the cross-sectional area of ​​the guide portion gradually decreases to guide the sealing pin through the injection hole.

4. The sealing nail according to claim 3, characterized in that, The deformable element is at least partially disposed within the sealing portion.

5. The sealing nail according to claim 4, characterized in that, The deformable element is at least partially disposed within the guide portion.

6. The sealing nail according to claim 3, characterized in that, The guide portion has a chamfer at the end away from the sealing portion.

7. The sealing nail according to claim 1, characterized in that, Along the radial direction of the sealing pin, the ratio of the size of the deformable member to the size of the sealing pin is greater than or equal to 0.5 and less than or equal to 0.

95.

8. The sealing nail according to claim 7, characterized in that, Along the radial direction of the sealing pin, the size of the deformable element is greater than or equal to 0.5 mm and less than or equal to 5 mm.

9. The sealing nail according to claim 1, characterized in that, Along the axial direction of the sealing pin, the length of the deformable element is greater than or equal to 1 mm.

10. The sealing nail according to any one of claims 1 to 9, characterized in that, The deformable component is detachably connected to the elastic component.

11. The sealing nail according to claim 10, characterized in that, The deformable component has an external thread on its outer periphery, and the elastic component has an internal threaded hole corresponding to the external thread, with the external thread and the internal threaded hole forming a threaded engagement; or... The deformable part has a protrusion on its outer periphery, and the deformable part is interference-fitted with the elastic part through the protrusion.

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