Sealing nail and battery

Abstract

The utility model provides a sealing nail and a battery. The sealing nail comprises a sealing nail body. The sealing nail skirt belt is arranged on the circumferential outer side wall of the sealing nail body in a surrounding mode, and at least the periphery of the sealing nail skirt belt can swing relative to the joint of the sealing nail skirt belt and the sealing nail body in the axial direction of the sealing nail body. The battery sealing nail solves the problem of poor use performance of the battery sealing nail in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technical field, specifically, relate to a sealed nail and battery. BACKGROUND

[0002] Secondary battery is also called rechargeable battery or storage battery, which refers to the battery that can be activated by charging after discharging.

[0003] In the production process of secondary battery, the production yield is often a parameter that enterprises focus on. The production of secondary battery can be generally divided into three stages: the front stage of feeding production of positive and negative electrode sheets, the middle stage of assembling electrode assemblies (including positive electrode sheets, negative electrode sheets, separators and other parts) into the shell, and the rear stage of liquid injection and production of finished battery.

[0004] The top cover of the secondary battery often has a liquid injection hole. In the rear stage of liquid injection process, the electrolyte is injected into the electrode assembly produced in the middle stage by an instrument. The battery with completed liquid injection is sealed with a sealing nail, and finally an aluminum sheet is welded to complete the sealing. In some prior art, the liquid injection hole can also be arranged on the shell.

[0005] After the liquid injection is completed and the sealing nail is installed, there is a battery shaping process. The battery using the ordinary sealing nail may have a liquid leakage in the local pressure, which may cause the aluminum sheet welding point to explode, resulting in the direct scrap of the battery.

[0006] Therefore, there is a problem of poor performance of the battery sealing nail in the prior art. UTILITY MODEL CONTENTS

[0007] The main purpose of the utility model is to provide a sealing nail and a battery to solve the problem of poor performance of the battery sealing nail in the prior art.

[0008] In order to achieve the above purpose, according to one aspect of the utility model, a sealing nail is provided, which comprises: a sealing nail body; and a sealing nail skirt, which is arranged around the circumferential outer wall of the sealing nail body, and at least the periphery of the sealing nail skirt can swing along the connection between the sealing nail skirt and the sealing nail body in the axial direction of the sealing nail body.

[0009] Further, at least a part of the sealing nail skirt is made of a deformable material.

[0010] Further, in the radial direction of the sealing nail skirt, the thickness of the sealing nail skirt gradually decreases in the direction away from the center.

[0011] Further, the sealing nail skirt has an initial state and a sealing state. When the sealing nail skirt switches from the initial state to the sealing state, the periphery of the sealing nail skirt moves in the direction away from the top of the sealing nail body.

[0012] Further, when the sealing spike skirt is in the initial state, the top surface of the sealing spike skirt has an included angle greater than 0 degrees with the horizontal plane; and / or when the sealing spike skirt is in the sealing state, the top surface of the sealing spike skirt is parallel to the horizontal plane.

[0013] Further, the ratio of the diameter of the outer periphery of the sealing spike skirt to the diameter of the connecting portion of the sealing spike body corresponding to the sealing spike skirt is greater than or equal to 1.2 and less than or equal to 1.3.

[0014] Further, the sealing spike body comprises a sealing spike head and a sealing spike tail connected in sequence, the sealing spike skirt is arranged around the connecting portion of the sealing spike head and the sealing spike tail, and the diameter of the sealing spike tail gradually decreases along the direction away from the sealing spike head.

[0015] Further, the diameter of the sealing spike head at least near one end of the sealing spike tail gradually increases along the direction away from the sealing spike tail; and / or the diameter of the sealing spike tail near the one end of the sealing spike head is greater than the diameter of the sealing spike head near the one end of the sealing spike tail.

[0016] According to another aspect of the present application, a battery is provided, comprising the above sealing spike and a shell, the sealing spike is arranged in the liquid injection hole of the shell, and the sealing spike skirt of the sealing spike is located inside the shell.

[0017] Further, when the sealing spike skirt is in the initial state, the sealing spike skirt is arranged in a spaced manner with the inner surface of the shell, when the sealing spike skirt is in the sealing state, the top surface of the sealing spike skirt abuts against the inner surface of the shell.

[0018] The technical scheme of the present application, the sealing spike in the present application comprises a sealing spike body and a sealing spike skirt, the sealing spike skirt is arranged around the circumferential outer side wall of the sealing spike body, and at least the periphery of the sealing spike skirt can swing along the axial direction of the sealing spike body relative to the connecting portion of the sealing spike skirt and the sealing spike body.

[0019] When the sealing nail in the application is used to seal the liquid injection hole of the battery, the periphery of the sealing nail skirt can swing along the axial direction of the sealing nail body relative to the connection between the sealing nail skirt and the sealing nail body. Therefore, when the sealing nail skirt enters the liquid injection hole along with the sealing nail body, the sealing nail skirt is extruded by the periphery of the sealing hole, and the periphery of the sealing nail skirt can enter the inside of the battery along with the sealing nail body in the form of swinging towards the axial direction of the sealing nail body. When the pressure inside the battery is higher than the external pressure, the sealing nail body and the sealing nail skirt will be subjected to a force in the direction of exiting the liquid injection hole, and at this time, the periphery of the sealing nail skirt abuts against the inner wall of the battery shell where the liquid injection hole is located, so that the periphery of the sealing nail skirt swings in the direction away from the axial direction of the sealing nail body under the force provided by the inner wall of the battery shell, that is, in the form of opening the umbrella, so as to seal the liquid injection hole and effectively avoid the leakage of the battery. Therefore, the sealing nail in the application effectively solves the problem of poor performance of the battery sealing nail in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein by reference. The embodiments illustrated in the drawings are shown as specific examples for purposes of explanation only and are not intended to limit the present application in any way. In the drawings:

[0021] Figure 1 A structure schematic diagram of a sealing nail according to one specific embodiment of the present application is shown;

[0022] Figure 2 A position relationship schematic diagram of the sealing nail skirt and the shell when the sealing nail skirt is in an initial state in one specific embodiment of the present application is shown;

[0023] Figure 3 A position relationship schematic diagram of the sealing nail skirt and the shell when the sealing nail skirt is in a sealing state in one specific embodiment of the present application is shown.

[0024] Among them, the above drawings include the following reference signs:

[0025] 10, sealing nail body; 11, sealing nail head; 12, sealing nail tail; 20, sealing nail skirt; 30, shell. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs, unless otherwise specified.

[0028] In the present application, unless otherwise specified, the orientation words such as "upper, lower, top, bottom" used herein are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0029] In order to solve the poor performance problem of the battery sealing nail in the prior art, the present application provides a sealing nail and a battery.

[0030] As shown in Figure 1 The sealing nail in the present application includes a sealing nail body 10 and a sealing nail skirt 20, the sealing nail skirt 20 is arranged around the circumferential outer side wall of the sealing nail body 10, and at least the circumference of the sealing nail skirt 20 can swing relative to the connection between the sealing nail skirt 20 and the sealing nail body 10 along the axial direction of the sealing nail body 10.

[0031] When the sealing nail in the present application is used for the liquid injection hole of the battery, since the circumference of the sealing nail skirt 20 can swing relative to the connection between the sealing nail skirt 20 and the sealing nail body 10 along the axial direction of the sealing nail body 10, therefore, in the process of the sealing nail skirt 20 entering the liquid injection hole together with the sealing nail body 10, the sealing nail skirt 20 is extruded by the circumference of the sealing hole, forming an action similar to the folding of an umbrella, so the circumference of the sealing nail skirt 20 can pass through the liquid injection hole and enter the inside of the battery by swinging in the direction close to the axis of the sealing nail body 10 together with the sealing nail body 10. When the pressure inside the battery is higher than the external pressure, the sealing nail body 10 and the sealing nail skirt 20 will be subjected to a force in the direction of exiting the liquid injection hole, and at this time the circumference of the sealing nail skirt 20 abuts against the inner wall surface of the battery shell where the liquid injection hole is located, so that the circumference of the sealing nail skirt 20 swings in the direction away from the axial direction of the sealing nail body 10 under the force provided by the inner wall surface of the battery shell, that is, forming an action similar to the opening of an umbrella, so as to realize the sealing of the liquid injection hole and effectively avoid the leakage of the battery. Therefore, the sealing nail in the present application effectively solves the poor performance problem of the battery sealing nail in the prior art. It is particularly pointed out that in the present application, the battery shell includes a shell and a top cover.

[0032] Specifically, at least a part of the sealing nail skirt 20 is made of a deformable material. In the present application, the sealing nail skirt 20 can be made of flexible materials such as rubber or silicone, so as to ensure that the circumference of the sealing nail skirt 20 can swing under the action of external force.

[0033] In one specific embodiment of the present application, the sealing spike skirt 20 and the sealing spike body 10 are both made of rubber material.

[0034] Preferably, the sealing spike skirt 20 and the sealing spike body 10 are integrally formed. By so arranging, the separation of the sealing spike skirt 20 from the sealing spike body 10 during use can be effectively prevented, thereby effectively ensuring the use effect of the sealing spike in the present application.

[0035] Optionally, in the radial direction of the sealing spike skirt 20, the thickness of the sealing spike skirt 20 gradually decreases in the direction away from the center. During the process of the sealing spike skirt 20 and the sealing spike body 10 entering the liquid injection hole, by so arranging, the sealing spike skirt 20 can more easily pass through the liquid injection hole and enter the inside of the battery. Moreover, when the pressure inside the battery increases, by so arranging, the sealing spike skirt 20 can be effectively prevented from exiting the liquid injection hole under the action of the pressure, thereby ensuring the sealing effect of the sealing spike skirt 20 on the liquid injection hole.

[0036] Optionally, the sealing spike skirt 20 has an initial state and a sealing state, and when the sealing spike skirt 20 switches from the initial state to the sealing state, the peripheral edge of the sealing spike skirt 20 moves in the direction away from the top of the sealing spike body 10. It should be noted that in the present application, the initial state of the sealing spike skirt 20 generally refers to the shape of the sealing spike skirt 20 when it is not subjected to external force; or the position relationship between the sealing spike skirt 20 and the sealing spike body 10 when the sealing spike skirt 20 is not subjected to force. And the sealing state of the sealing spike skirt 20 generally refers to the shape of the sealing spike skirt 20 when it is subjected to external force after passing through the liquid injection hole and entering the inside of the battery; or the position relationship between the sealing spike skirt 20 and the sealing spike body 10 when the sealing spike skirt 20 is subjected to force after passing through the liquid injection hole and entering the inside of the battery.

[0037] Optionally, when the sealing spike skirt 20 is in the initial state, the top surface of the sealing spike skirt 20 and the horizontal plane have an included angle greater than 0 degrees. By so arranging, the sealing spike skirt 20 can more easily pass through the liquid injection hole together with the sealing spike body 10.

[0038] Optionally, when the sealing spike skirt 20 is in the sealing state, the top surface of the sealing spike skirt 20 is parallel to the horizontal plane. Thus, the contact area between the sealing spike skirt 20 and the surface of the top cover located inside the battery is larger at this time, and the sealing effect is better, that is, the occurrence of the liquid gushing phenomenon can be better prevented.

[0039] In one embodiment of the present application, the sealing nail body 10 comprises a sealing nail head 11 and a sealing nail tail 12 connected in sequence, the sealing nail skirt 20 is arranged at the connection between the sealing nail head 11 and the sealing nail tail 12, and the diameter of the sealing nail tail 12 gradually decreases in the direction away from the sealing nail head 11. That is, when the sealing nail in the present application is used to seal the liquid injection hole of the battery, the sealing nail skirt 20 will pass through the liquid injection hole with the sealing nail tail 12 and enter the inside of the battery, while part of the sealing nail head 11 can be located in the liquid injection hole, and the other part of the sealing nail head 11 can be located outside or above the liquid injection hole. Of course, in the present application, the entire sealing nail head 11 can also be in the liquid injection hole, and the overall shape of the sealing nail can be adaptively adjusted according to the actual use requirements.

[0040] Optionally, the ratio of the diameter of the outer periphery of the sealing nail skirt 20 to the diameter of the connection of the sealing nail body 10 corresponding to the sealing nail skirt 20 is greater than or equal to 1.2 and less than or equal to 1.3. In one embodiment of the present application, the ratio of the diameter of the outer periphery of the sealing nail skirt 20 to the diameter of the connection of the sealing nail body 10 corresponding to the sealing nail skirt 20 is 1.25:1. And it should be noted that in the present application, since the outer periphery of the sealing nail skirt 20 can swing, the diameter of the outer periphery of the sealing nail skirt 20 refers to the maximum outer periphery diameter of the sealing nail skirt 20 in different states, and generally refers to the diameter when the sealing nail skirt 20 is in a sealed state, and when the position of the periphery of the sealing nail skirt 20 changes, there can be a case that the distance from the periphery of the sealing nail skirt 20 to the central axis of the sealing nail body 10 is less than the radius of the periphery of the sealing nail skirt 20. By setting the upper limit value of the diameter, it can avoid that the large outer periphery of the sealing nail skirt 20 makes it difficult for the sealing nail skirt 20 to enter the liquid injection hole, and can reduce the manufacturing cost and the weight of the sealing nail; and by setting the lower limit value of the diameter, it can ensure that the sealing nail skirt 20 has good sealing effect.

[0041] Optionally, the diameter of the sealing nail head 11 at least near one end of the sealing nail tail 12 gradually increases in the direction away from the sealing nail tail 12. By such setting, the sealing effect of the sealing nail head 11 on the liquid injection hole can be effectively ensured.

[0042] Optionally, the diameter of the sealing nail tail 12 near one end of the sealing nail head 11 is greater than the diameter of the sealing nail head 11 near one end of the sealing nail tail 12. That is, in the present application, a stepped surface can be formed at the connection between the sealing nail head 11 and the sealing nail tail 12, and the sealing nail skirt 20 is arranged at the periphery of the stepped surface. And the stepped surface formed at the connection between the sealing nail head 11 and the sealing nail tail 12 can further ensure the sealing effect on the liquid injection hole.

[0043] As Figure 2And Figure 3 As shown in the above description, the battery in the present application also provides a battery, and the battery in the present application comprises the sealing nail and the shell 30, the sealing nail is arranged in the liquid injection hole of the shell 30, and the sealing nail skirt of the sealing nail is located in the inside of the shell 30. When the sealing nail skirt 20 is in the initial state, the sealing nail skirt 20 is arranged in the spaced mode with the inner surface of the shell 30, and when the sealing nail skirt 20 is in the sealing state, the top surface of the sealing nail skirt 20 is in abutment with the inner surface of the shell 30. By applying the sealing nail in the present application to the battery, the battery can be prevented from liquid gushing in the shaping step of the battery, and when the pressure in the battery changes, the relative position relationship between the sealing nail skirt 20 and the inner surface of the shell 30 changes from the initial state to the sealing state, so as to realize the sealing of the liquid injection hole, thereby improving the yield of the battery. In addition to the shaping step, when the battery is subjected to other external extrusion pressure, by applying the sealing nail in the present application to the battery, the same effect of preventing liquid gushing can also be achieved.

[0044] Optionally, the shell 30 in the present application comprises a shell body and a top cover, and the liquid injection hole can be arranged on the top cover or the shell body.

[0045] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0046] 1. Effectively solve the problem of poor performance of the battery sealing nail in the prior art;

[0047] 2. Simple structure and stable performance.

[0048] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0049] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0050] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and in the above-described drawings are used only for distinguishing between similar objects and do not necessarily have to describe a specific sequential or chronological order. It is to be understood that the data so distinguished can be interchanged, under appropriate circumstances, such that the embodiments of the present application described herein can be practiced in other than the illustrated or described order.

[0051] The preferred embodiments of the present application have been described above with the specific details. Obviously, the present application can be carried out without the specific details. It is to be understood that the above-described embodiments are only used to illustrate the present application, and the present application can be modified and changed in various ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sealing spike, characterized in that, The sealing spike comprises: a sealing spike body (10); a sealing spike skirt (20) arranged around a circumferential outer wall of the sealing spike body (10), and at least a peripheral edge of the sealing spike skirt (20) is capable of swinging along the sealing spike body (10) relative to a connection between the sealing spike skirt (20) and the sealing spike body (10) in an axial direction.

2. The seal spike of claim 1, wherein, At least a portion of the sealing spike skirt (20) is made of a deformable material.

3. The seal spike of claim 1, wherein, In a radial direction of the sealing spike skirt (20), a thickness of the sealing spike skirt (20) gradually decreases in a direction away from a center of a circle.

4. The seal spike of claim 1, wherein, The sealing spike skirt (20) has an initial state and a sealing state, and when the sealing spike skirt (20) switches from the initial state to the sealing state, a peripheral edge of the sealing spike skirt (20) moves in a direction away from a top of the sealing spike body (10).

5. The sealing spike according to claim 4, wherein when the sealing spike skirt (20) is in the initial state, an included angle between a top surface of the sealing spike skirt (20) and a horizontal plane is greater than 0 degrees; and / or when the sealing spike skirt (20) is in the sealing state, the top surface of the sealing spike skirt (20) is parallel to the horizontal plane.

6. The seal of claim 1, wherein A ratio of a diameter of an outer peripheral edge of the sealing spike skirt (20) to a diameter of a connection between the sealing spike body (10) and the sealing spike skirt (20) is greater than or equal to 1.2 and less than or equal to 1.

3.

7. The seal spike of any one of claims 1 to 6, wherein, The sealing spike body (10) comprises a sealing spike head (11) and a sealing spike tail (12) connected in sequence, the sealing spike skirt (20) is arranged around the connection between the sealing spike head (11) and the sealing spike tail (12), and a diameter of the sealing spike tail (12) gradually decreases in a direction away from the sealing spike head (11).

8. The sealing spike according to claim 7, wherein a diameter of the sealing spike head (11) at least near one end of the sealing spike tail (12) gradually increases in a direction away from the sealing spike tail (12); and / or a diameter of the sealing spike tail (12) near one end of the sealing spike head (11) is greater than a diameter of the sealing spike head (11) near one end of the sealing spike tail (12).

9. A battery, characterized by The sealing spike comprises:

10. The battery of claim 9, wherein, a sealing spike body (10); a sealing spike skirt (20) arranged around a circumferential outer wall of the sealing spike body (10), and at least a peripheral edge of the sealing spike skirt (20) is capable of swinging along the sealing spike body (10) relative to a connection between the sealing spike skirt (20) and the sealing spike body (10) in an axial direction. At least a portion of the sealing spike skirt (20) is made of a deformable material. In a radial direction of the sealing spike skirt (20), a thickness of the sealing spike skirt (20) gradually decreases in a direction away from a center of a circle. The sealing spike skirt (20) has an initial state and a sealing state, and when the sealing spike skirt (20) switches from the initial state to the sealing state, a peripheral edge of the sealing spike skirt (20) moves in a direction away from a top of the sealing spike body (10).

5. The sealing spike according to claim 4, wherein when the sealing spike skirt (20) is in the initial state, an included angle between a top surface of the sealing spike skirt (20) and a horizontal plane is greater than 0 degrees; and / or when the sealing spike skirt (20) is in the sealing state, the top surface of the sealing spike skirt (20) is parallel to the horizontal plane. A ratio of a diameter of an outer peripheral edge of the sealing spike skirt (20) to a diameter of a connection between the sealing spike body (10) and the sealing spike skirt (20) is greater than or equal to 1.2 and less than or equal to 1.

3. The sealing spike body (10) comprises a sealing spike head (11) and a sealing spike tail (12) connected in sequence, the sealing spike skirt (20) is arranged around the connection between the sealing spike head (11) and the sealing spike tail (12), and a diameter of the sealing spike tail (12) gradually decreases in a direction away from the sealing spike head (11).

8. The sealing spike according to claim 7, wherein a diameter of the sealing spike head (11) at least near one end of the sealing spike tail (12) gradually increases in a direction away from the sealing spike tail (12); and / or a diameter of the sealing spike tail (12) near one end of the sealing spike head (11) is greater than a diameter of the sealing spike head (11) near one end of the sealing spike tail (12). The sealing spike comprises: a sealing spike body (10); a sealing spike skirt (20) arranged around a circumferential outer wall of the sealing spike body (10), and at least a peripheral edge of the sealing spike skirt (20) is capable of swinging along the sealing spike body (10) relative to a connection between the sealing spike skirt (20) and the sealing spike body (10) in an axial direction. At least a portion of the sealing spike skirt (20) is made of a deformable material. In a radial direction of the sealing spike skirt (20), a thickness of the sealing spike skirt (20) gradually decreases in a direction away from a center of a circle. The sealing spike skirt (20) has an initial state and a sealing state, and when the sealing spike skirt (20) switches from the initial state to the sealing state, a peripheral edge of the sealing spike skirt (20) moves in a direction away from a top of the sealing spike body (10).

5. The sealing spike according to claim 4, wherein when the sealing spike skirt (20) is in the initial state, an included angle between a top surface of the sealing spike skirt (20) and a horizontal plane is greater than 0 degrees; and / or when the sealing spike skirt (20) is in the sealing state, the top surface of the sealing spike skirt (20) is parallel to the horizontal plane. A ratio of a diameter of an outer peripheral edge of the sealing spike skirt (20) to a diameter of a connection between the sealing spike body (10) and the sealing spike skirt (20) is greater than or equal to 1.2 and less than or equal to 1.

3. The sealing spike body (10) comprises a sealing spike head (11) and a sealing spike tail (12) connected in sequence, the sealing spike skirt (20) is arranged around the connection between the sealing spike head (11) and the sealing spike tail (12), and a diameter of the sealing spike tail (12) gradually decreases in a direction away from the sealing spike head (11).

8. The sealing spike according to claim 7, wherein a diameter of the sealing spike head (11) at least near one end of the sealing spike tail (12) gradually increases in a direction away from the sealing spike tail (12); and / or a diameter of the sealing spike tail (12) near one end of the sealing spike head (11) is greater than a diameter of the sealing spike head (11) near one end of the sealing spike tail (12). The sealing spike comprises: a sealing spike body (10); a sealing spike skirt (20) arranged around a circumferential outer wall of the sealing spike body (10), and at least a peripheral edge of the sealing spike skirt (20) is capable of swinging along the sealing spike body (10) relative to a connection between the sealing spike skirt (20) and the sealing spike body (10) in an axial direction. At least a portion of the sealing spike skirt (20) is made of a deformable material. In a radial direction of the sealing spike skirt (20), a thickness of the sealing spike skirt (20) gradually decreases in a direction away from a center of a circle. The sealing spike skirt (20) has an initial state and a sealing state, and when the sealing spike skirt (20) switches from the initial state to the sealing state, a peripheral edge of the sealing spike skirt (20) moves in a direction away from a top of the sealing spike body (10).

5. The sealing spike according to claim 4, wherein when the sealing spike skirt (20) is in the initial state, an included angle between a top surface of the sealing spike skirt (20) and a horizontal plane is greater than 0 degrees; and / or when the sealing spike skirt (20) is in the sealing state, the top surface of the sealing spike skirt (20) is parallel to the horizontal plane. A ratio of a diameter of an outer peripheral edge of the sealing spike skirt (20) to a diameter of a connection between the sealing spike body (10) and the sealing spike skirt (20) is greater than or equal to 1.2 and less than or equal to 1.

3. The sealing spike body (10) comprises a sealing spike head (11) and a sealing spike tail (12) connected in sequence, the sealing spike skirt (20) is arranged around the connection between the sealing spike head (11) and the sealing spike tail (12), and a diameter of the sealing spike tail (12) gradually decreases in a direction away from the sealing spike head (11).

8. The sealing spike according to claim 7, wherein a diameter of the sealing spike head (11) at least near

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