Sealing nail, battery monomer, battery and electric device

Abstract

The utility model provides a sealing nail, a battery monomer, a battery and an electric device. The sealing nail comprises a rod part and a cap located at one end of the rod part along a first direction, in the first direction, the rod part and the cap cover respectively comprise a first surface and a second surface which deviate from each other, and at least one of the first surface and the second surface is arranged to be a non-flat surface, so that adjacent sealing nails can be in contact through the non-flat surface when materials are fed, the situation that the sealing nails are adhered to each other when the materials are fed is reduced, and the nail grabbing efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of sealing nails, and in particular to a sealing nail, a battery cell, a battery and an electrical device. Background Art

[0002] At present, in the actual production process of power batteries, the battery cells need to be sealed and left to stand with transfer sealing pins after liquid injection and exhaust. If subsequent processes, such as secondary liquid injection, are required, the transfer sealing pins must be removed and then replaced with new sealing pins for cleaning and sealing, which is a complicated process.

[0003] In the existing production, the sealing nails used are easy to stick to each other during the handling and cleaning process, which is not conducive to the nail suction equipment to suck the nails and affects the assembly efficiency. Therefore, how to improve the assembly efficiency of the sealing nails has become an urgent problem to be solved. Utility Model Content

[0004] In view of the above problems, the present application provides a sealing nail, a battery cell, a battery and an electrical device, which can reduce the situation where the sealing nails stick to each other when they are incoming, and improve the assembly efficiency of the sealing nails.

[0005] In a first aspect, the present application provides a sealing nail, comprising a rod and a cap located at one end of the rod along a first direction. In the first direction, the rod and the cap respectively comprise a first surface and a second surface facing away from each other, and at least one of the first surface and the second surface is set as a non-flat surface.

[0006] In the embodiment of the present application, by setting at least one of the first surface and the second surface as a non-flat surface, adjacent sealing nails can contact each other through the non-flat surface when the material is received, thereby reducing the situation where the sealing nails stick to each other when the material is received and improving the nail grabbing efficiency.

[0007] In some embodiments, the non-flat surface is a curved surface, or the non-flat surface includes a plane and an anti-adhesion portion disposed on the plane, the anti-adhesion portion is convex relative to the plane along the first direction and forms a convex portion, or the anti-adhesion portion is concave relative to the plane along the first direction and forms a concave portion. By setting the non-flat surface as a curved surface or a plane provided with an anti-adhesion portion, the problem of mutual adhesion of the sealing nails when the nail suction device is maintained can be reduced while maintaining close adsorption between the nail suction device and the contact surface of the sealing nails, thereby improving the assembly efficiency of the sealing nails.

[0008] In some embodiments, both the first surface and the second surface are configured as non-flat surfaces, further reducing the probability of the sealing pins sticking to each other.

[0009] In some embodiments, the anti-sticking portions on the first surface and the second surface are different in size and / or shape, and the first surface and the second surface can be distinguished based on the anti-sticking portions on the first surface and the second surface, thereby making it easier for the nail suction device to identify the rod and the cap of the sealing nail to achieve accurate grasping of the sealing nail.

[0010] In some embodiments, the anti-sticking portion on the first surface is a recessed portion, which can increase the amount of deformation of the rod portion away from the end cover, so that when the sealing nail is inserted into the injection hole, the first anti-sticking portion can provide a certain flow space for the deformation of the sealing nail during insertion, thereby facilitating the insertion of the sealing nail into the injection hole, reducing the difficulty of pressing the nail, and further improving the assembly efficiency of the sealing nail.

[0011] In some embodiments, the rod portion includes an introduction section and a sealing section connected along a first direction, the introduction section is connected to the cap through the sealing section, the diameter of the introduction section is larger than the diameter of the sealing section, and the anti-adhesion portion is provided on the introduction section. On the one hand, the first anti-adhesion portion can provide a certain flow space for the deformation of the introduction section with a larger diameter, so that the introduction section is convenient for inserting into the injection hole, and on the other hand, after the introduction section is inserted into the injection hole, the introduction section can restore the deformation and abut against the injection hole, so as to reduce the probability of the sealing nail coming out of the injection hole.

[0012] In some embodiments, the introduction section includes a first subsection and a second subsection, and in the first direction, the second subsection is located between the first subsection and the sealing section. The diameter of the introduction section increases at the junction of the first subsection and the second subsection to form a neck.

[0013] In some embodiments, in the first direction, the distance between the bottom surface of the anti-sticking portion and the first surface is smaller than the distance between the neck and the first surface. Therefore, when the sealing pin is inserted into the injection hole, it can be guided by the first sub-segment to facilitate the insertion of the sealing pin. When the sealing pin is removed, it can be guided by the second sub-segment to reduce the difficulty of removing the sealing pin.

[0014] In some embodiments, the anti-sticking portion is disposed in the central area of ​​the plane to facilitate the insertion of the rod and the grasping of the sealing nail by the nail suction device.

[0015] In a second aspect, an embodiment of the present application provides a battery cell, including: an end cover, which is provided with a liquid injection hole; and a sealing nail, such as the sealing nail of the first aspect, which is sealed in the liquid injection hole.

[0016] In a third aspect, an embodiment of the present application provides a battery, comprising the battery cell of the second aspect.

[0017] In a fourth aspect, an embodiment of the present application provides an electrical device, comprising the battery of the third aspect, and the battery is used to provide electrical energy.

[0018] According to the sealing nail of the embodiment of the present application, it includes a rod and a cap located at one end of the rod, the sealing nail is inserted into the injection hole through the rod, and is covered on the injection hole through the cap. The rod and the cap respectively include a first surface and a second surface facing away from each other, and by setting at least one of the first surface and the second surface as a non-flat surface, when the material is received, the adjacent sealing nails can contact each other through the non-flat surface, thereby reducing the situation where the sealing nails stick to each other when they are received, and improving the nail grabbing efficiency.

[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 is a schematic diagram of the structure of an electric device provided by an embodiment of the present application;

[0022] Figure 2 is an exploded diagram of a battery provided by an embodiment of the present application;

[0023] Figure 3 is an exploded view of a battery cell provided by an embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the structure of an end cover provided by an embodiment of the present application;

[0025] Figure 5 yes Figure 4 Cross-sectional view in CC direction;

[0026] Figure 6 This is a schematic diagram of the structure of a sealing nail at an angle provided by an embodiment of the present application;

[0027] Figure 7 This is a schematic structural diagram of a sealing pin provided by an embodiment of the present application from another angle;

[0028] Figure 8 is a cross-sectional view of a sealing nail provided by an embodiment of the present application;

[0029] Fig. 9 is a schematic structural diagram of a sealing nail at an angle provided by another embodiment of the present application;

[0030] Fig.10 is a schematic structural diagram of a sealing pin provided by another embodiment of the present application at another angle;

[0031] Fig.11 yes Figure 5 Enlarged view of point B in the middle.

[0032] The reference numerals in the specific implementation manner are as follows:

[0033] 100 batteries, 110 battery cells, 200 controllers, 300 motors;

[0034] 10 end cap, 20 sealing nail, 30 electrode assembly, 40 shell;

[0035] 1 rod portion, 11 introduction section, 111 first subsection, 112 second subsection, 12 sealing section, 13 first anti-adhesion portion, 2 cap, 3 anti-adhesion portion, 3a first anti-adhesion portion, 3b second anti-adhesion portion;

[0036] K1 injection hole, S1 first surface, S2 second surface;

[0037] Z first direction. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0040] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0041] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0042] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] The embodiment of the present application provides an electric device, including a battery 100, which can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc. The battery 100 is used to provide electric energy to the electric device, which can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. It should be understood that the technical solution described in the embodiment of the present application is applicable to all electric devices including the battery 100 and using the battery 100, but for the sake of simplicity, the following embodiments are all described by taking electric vehicles as an example.

[0045] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle, and the battery 100 may be provided at the bottom, head or tail of the vehicle. The battery 100 may be used to power the vehicle, for example, the battery 100 may be used as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle.

[0046] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells 110 to provide higher voltage and capacity.

[0047] In some embodiments, the battery 100 may be a battery module. When there are multiple battery cells 110 , the multiple battery cells 110 are arranged and fixed to form a battery module.

[0048] In the embodiment of the present application, the battery cell 110 may be a secondary battery cell. A secondary battery cell refers to a battery cell 110 that can be continuously used by activating active materials by charging after the battery cell 110 is discharged.

[0049] As an example, the battery cell 110 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery 100 , and the polygonal battery 100 is, for example, a hexagonal battery 100 , etc.

[0050] The battery cells 110 include but are not limited to lithium-ion battery cells, sodium-ion battery cells, sodium-lithium-ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium-sulfur battery cells, magnesium-ion battery cells, nickel-hydrogen battery cells, nickel-cadmium battery cells, lead-acid battery cells, etc.

[0051] See also Figure 3 , Figure 3 This is an exploded view of a battery cell 110 provided in some embodiments of the present application. The battery cell 110 provided in the embodiments of the present application includes an end cover 10, a sealing pin 20, an electrode assembly 30 and a shell 40.

[0052] The housing 40 is used to accommodate the electrode assembly 30, the electrolyte and other components, and the end cap 10 refers to a component that covers the opening of the housing 40 to isolate the internal environment of the battery cell 110 from the external environment. Without limitation, the shape of the end cap 10 can be adapted to the shape of the opening of the housing 40 to match the housing 40. Optionally, the end cap 10 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 10 is not easily deformed when squeezed and collided.

[0053] The housing 40 and the end cover 10 may be independent components. An opening may be provided on the housing 40 , and the end cover 10 may cover the opening to seal the internal environment of the battery cell 110 .

[0054] See also Figure 4 and Figure 5 The end cap 10 of the battery cell 110 is usually provided with an injection hole K1, through which electrolyte can be injected after the end cap 10 and the housing 40 are welded and sealed. In order to ensure the sealing of the injection hole K1, it is necessary to insert a sealing nail 20 into the injection hole K1 after the injection process is completed, so that the sealing nail 20 can seal the injection hole K1 on the end cap 10.

[0055] When inserting the sealing nail 20 at the injection hole K1, it is often necessary to first grab the sealing nail 20 through the nail suction device, and then press the sealing nail 20 into the injection hole K1. However, along the insertion direction of the sealing nail 20, both ends of the sealing nail 20 in the related art are designed to be completely flat and filled. When the material is incoming, the sealing nails 20 are easily adhered to each other, which is not conducive to the nail suction device grabbing the sealing nail 20, reducing the assembly efficiency of the sealing nail 20 and affecting the production efficiency of the battery 100.

[0056] Based on the above considerations, in order to improve the assembly efficiency of the sealing nail 20, the embodiment of the present application further provides a new sealing nail 20. The sealing nail 20 of the embodiment of the present application is further described below in conjunction with the accompanying drawings.

[0057] See also Figures 6 to 8 The sealing nail 20 provided in the embodiment of the present application includes a rod portion 1 and a cap 2 located at one end of the rod portion 1 along a first direction Z. In the first direction Z, the rod portion 1 and the cap 2 respectively include a first surface S1 and a second surface S2 that are opposite to each other, and at least one of the first surface S1 and the second surface S2 is set to be a non-flat surface.

[0058] In the embodiment of the present application, the sealing nail 20 includes a rod 1 and a cap 2 located at one end of the rod 1. The sealing nail 20 is inserted into the injection hole K1 through the rod 1 and is covered on the injection hole K1 through the cap 2. The rod 1 and the cap 2 respectively include a first surface S1 and a second surface S2 that are opposite to each other. By setting at least one of the first surface S1 and the second surface S2 as a non-flat surface, when the material is received, the adjacent sealing nails 20 can contact each other through the non-flat surface, thereby reducing the situation where the sealing nails 20 stick to each other when the material is received, and improving the nail grasping efficiency.

[0059] It can be understood that a non-planar surface refers to a surface with certain surface morphology changes.

[0060] When the surfaces of the sealing pins 20 are flat surfaces, when the sealing pins 20 contact each other, the flat surfaces may fit together and exhaust the air between them to form a vacuum, causing the sealing pins 20 to stick to each other. Therefore, by setting at least one of the first surface S1 and the second surface S2 of the sealing pin 20 as a non-flat surface, air can be introduced between the contact surfaces of adjacent sealing pins 20, thereby reducing the possibility of the sealing pins 20 sticking to each other and improving the assembly efficiency of the sealing pins 20.

[0061] In some optional embodiments, the non-flat surface is a curved surface (not shown in the figure), for example, at least one of the first surface S1 and the second surface S2 can be a convex surface formed by a whole-surface protrusion, or a concave surface formed by a whole-surface concavity. By setting the non-flat surface as a curved surface, its surface is still a smooth surface, so that the close adsorption of the contact surface between the nail suction device and the sealing nail 20 can be maintained, that is, it does not affect the nail suction device while reducing the mutual adhesion between the sealing nails 20 when the material is incoming, thereby improving the assembly efficiency of the sealing nails 20.

[0062] In other optional embodiments, the non-flat surface includes a plane and an anti-sticking portion 3 arranged on the plane, and the anti-sticking portion 3 is convexly arranged relative to the plane along the first direction Z to form a convex portion, or the anti-sticking portion 3 is concavely arranged relative to the plane along the first direction Z to form a concave portion.

[0063] By providing the anti-adhesion portion 3 in a local area of ​​the plane, on the one hand, the close adsorption of the nail suction device and the contact surface of the sealing nail 20 can be maintained through the plane, and on the other hand, the anti-adhesion portion 3 can reduce the problem of mutual adhesion of the sealing nails 20 when they are fed, thereby improving the assembly efficiency of the sealing nails 20. At the same time, the anti-adhesion portion 3 can also provide a positioning feature for the nail suction device, making it easier for the nail suction device to adsorb and grasp the sealing nails 20.

[0064] Optionally, the anti-sticking portion 3 can be provided as an integral structure with the plane.

[0065] For the convenience of description, the following description is made by taking an example in which the non-flat surface includes a plane and an anti-sticking portion 3 arranged on the plane.

[0066] It can be understood that at least one of the first surface S1 and the second surface S2 is set as a non-flat surface, which includes at least two situations.

[0067] The first case is that one of the first surface S1 and the second surface S2 is a non-flat surface and the other is a flat surface. When the non-flat surface contacts the flat surface, the gap can be increased to avoid mutual adhesion. Moreover, by making the first surface S1 and the second surface S2 different, the first surface S1 and the second surface S2 can be distinguished, so that it is easier for the nail suction device to identify the rod 1 and the cap 2 of the sealing nail 20, so as to accurately grasp the sealing nail 20.

[0068] Another method is that both the first surface S1 and the second surface S2 are configured as non-flat surfaces. When both the first surface S1 and the second surface S2 are configured as non-flat surfaces, the probability of the sealing pins 20 sticking to each other can be further reduced.

[0069] See also Figures 6 to 10 When the first surface S1 and the second surface S2 are both configured as non-flat surfaces, in some optional embodiments, the sizes and / or shapes of the anti-adhesive portions 3 on the first surface S1 and the second surface S2 are different.

[0070] For the convenience of description, the anti-sticking portion 3 on the first surface S1 is defined as a first anti-sticking portion 3a, and the anti-sticking portion 3 on the second surface S2 is defined as a second anti-sticking portion 3b. By making the first anti-sticking portion 3a and the second anti-sticking portion 3b different in size and / or shape, the first surface S1 and the second surface S2 can be distinguished according to the first anti-sticking portion 3a and the second anti-sticking portion 3b, thereby making it easier for the nail suction device to identify the rod portion 1 and the cap 2 of the sealing nail 20, so as to achieve accurate grasping of the sealing nail 20.

[0071] It is understandable that the first anti-adhesive portion 3a and the second anti-adhesive portion 3b have different shapes, including that one of the first anti-adhesive portion 3a and the second anti-adhesive portion 3b is a concave portion and the other is a convex portion, and that the first anti-adhesive portion 3a and the second anti-adhesive portion 3b have different geometric shapes. As an example, the anti-adhesive portion 3 can be set to at least one of a hemisphere, a cone, a cylinder and other irregular bodies, the cone includes but is not limited to a cone, a triangular pyramid and a quadrangular pyramid, etc., and the cylinder includes but is not limited to a cylinder, a cube, a square body, etc.

[0072] Figures 6 to 8A schematic structural diagram of a sealing pin 20 in an embodiment of the present application is shown, wherein the first anti-sticking portion 3a and the second anti-sticking portion 3b are both configured as cylinders, but the first anti-sticking portion 3a is configured as a convex portion, and the second anti-sticking portion 3b is configured as a concave portion, and the two have different sizes.

[0073] Figures 9 to 11 A schematic structural diagram of a sealing pin 20 in another embodiment of the present application is shown, wherein the first anti-sticking portion 3a and the second anti-sticking portion 3b are both configured as hemispheres, but the first anti-sticking portion 3a is configured as a convex portion, and the second anti-sticking portion 3b is configured as a concave portion, and the two have different sizes.

[0074] Therefore, the sizes and shapes of the first anti-sticking portion 3a and the second anti-sticking portion 3b can be arbitrarily combined. Alternatively, when the number of the first anti-sticking portion 3a and / or the second anti-sticking portion 3b is more than two, the number of anti-sticking portions 3 on the first surface S1 and the second surface S2 can also be different, which can satisfy the difference between the first anti-sticking portion 3a and the second anti-sticking portion 3b, so that the nail suction device can distinguish the first surface S1 and the second surface S2.

[0075] See also Fig.11 In some optional embodiments, the anti-adhesion portion 3 on the first surface S1 is a concave portion. The above configuration can increase the amount of deformation of the rod portion 1 away from the cap 2, so that when the sealing nail 20 is inserted into the injection hole K1, the first anti-adhesion portion 3a can provide a certain flow space for the deformation of the sealing nail 20 during the insertion of the nail, making it easier for the sealing nail 20 to be inserted into the injection hole K1, reducing the difficulty of pressing the nail, and further improving the assembly efficiency of the sealing nail 20.

[0076] It is understandable that, in addition to facilitating the insertion of the sealing pin 20 into the liquid injection hole K1 , it is also necessary to reduce the probability of the sealing pin 20 escaping from the liquid injection hole K1 after being inserted into the liquid injection hole K1 .

[0077] In some optional embodiments, the rod portion 1 includes an introduction section 11 and a sealing section 12 connected along a first direction Z, the introduction section 11 is connected to the cap 2 through the sealing section 12, the diameter of the introduction section 11 is larger than the diameter of the sealing section 12, and the anti-sticking portion 3 is arranged on the introduction section 11.

[0078] Among them, by making the diameter of the introduction section 11 of the rod 1 larger than the diameter of the sealing section 12, and providing the first anti-sticking portion 3a on the introduction section 11, on the one hand, the first anti-sticking portion 3a can provide a certain flow space for the deformation of the introduction section 11 with a larger diameter, thereby facilitating the insertion of the introduction section 11 into the injection hole K1; on the other hand, after the introduction section 11 is inserted into the injection hole K1, the introduction section 11 can restore the deformation and abut against the injection hole K1, thereby reducing the probability of the sealing pin 20 escaping from the injection hole K1.

[0079] Considering that in the actual production process of some battery cells 110, if the battery cell needs to undergo subsequent processes, such as secondary filling, after liquid injection and exhaust, the sealing nails 20 need to be removed before proceeding, and then new sealing nails 20 need to be replaced and cleaned and covered with aluminum nails.

[0080] See also Fig.11 In case that the sealing nail needs to be pulled out, in some optional embodiments, the introduction section 11 includes a first subsection 111 and a second subsection 112, and in the first direction Z, the second subsection 112 is located between the first subsection 111 and the sealing section 12. The diameter of the introduction section 11 increases at the junction of the first subsection 111 and the second subsection 112 to form a neck.

[0081] That is, the maximum diameter of the introduction section 11 is located at the junction of the first subsection 111 and the second subsection 112, so when the sealing nail 20 is inserted into the injection hole K1, it can be guided by the first subsection 111 to facilitate the insertion of the sealing nail 20, and when the sealing nail 20 is removed, it can be guided by the second subsection 112 to reduce the difficulty of removing the sealing nail 20. And on this basis, the diameter of the neck can still be made larger than the diameter of the sealing part, so that the position of the sealing nail 20 can still be constrained by the neck, so as to reduce the probability of the sealing nail 20 coming out of the injection hole K1 when it is not required to be removed.

[0082] On this basis, in some optional embodiments, in the first direction Z, the distance between the bottom surface of the anti-adhesion portion 3 and the first surface S1 is smaller than the distance between the neck and the first surface S1. That is, the first anti-adhesion portion 3a does not exceed the neck, so the provision of the first anti-adhesion portion 3a will not affect the restraining effect of the neck, so that the neck can still effectively restrain the position of the sealing pin 20, reducing the probability of the sealing pin 20 coming out of the injection hole K1 when it is not required to be removed.

[0083] In some optional embodiments, the anti-adhesion portion 3 is disposed in the central area of ​​the plane.

[0084] It can be understood that, in addition to reducing the mutual adhesion of the sealing pins 20 when they are fed, the main function of the first anti-sticking portion 3a is to provide a flow space for the sealing pin 20 to be inserted into the injection hole K1. Therefore, by setting the first anti-sticking portion 3a as a recessed portion and locating it in the central area of ​​the first surface S1, when the sealing pin 20 is inserted, the rod portion 1 can be uniformly deformed in the circumferential direction, thereby improving the assembly efficiency of the sealing pin 20.

[0085] In this regard, the main function of the second anti-adhesion portion 3b is to position and absorb the nail suction device, so by locating the second anti-adhesion portion 3b in the central area of ​​the second surface S2, it is easier to position the nail suction device and improve production efficiency. Of course, the actual position of the second anti-adhesion portion 3b can also be adjusted according to the position of the suction nozzle of the nail suction device, that is, it can correspond to the nail suction device to accurately achieve the positioning and absorption of the sealing nail 20.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A sealing nail, characterized in that: The sealing nail comprises a rod portion and a cap located at one end of the rod portion along a first direction; In the first direction, the rod portion and the cap respectively include a first surface and a second surface facing away from each other, and at least one of the first surface and the second surface is configured as a non-flat surface.

2. The sealing nail according to claim 1, characterized in that: The non-flat surface is a curved surface; Alternatively, the non-flat surface includes a plane and an anti-sticking portion arranged on the plane, the anti-sticking portion is convex relative to the plane along the first direction to form a convex portion, or the anti-sticking portion is concave relative to the plane along the first direction to form a concave portion.

3. The sealing nail according to claim 2, characterized in that: The first surface and the second surface are both configured as non-planar surfaces.

4. The sealing nail according to claim 3, characterized in that: The anti-adhesive portions on the first surface and the second surface have different sizes and / or shapes.

5. The sealing nail according to claim 2, characterized in that: The anti-adhesion portion on the first surface is a concave portion.

6. The sealing nail according to claim 5, characterized in that: The rod portion includes an introduction section and a sealing section connected along the first direction, the introduction section is connected to the cap through the sealing section, the diameter of the introduction section is larger than the diameter of the sealing section, and the anti-sticking portion is arranged on the introduction section.

7. The sealing nail according to claim 6, characterized in that: The introduction section includes a first subsection and a second subsection. In the first direction, the second subsection is located between the first subsection and the sealing section. The diameter of the introduction section increases at the junction of the first subsection and the second subsection to form a neck.

8. The sealing nail according to claim 7, characterized in that: In the first direction, a distance between a bottom surface of the anti-adhesion portion and the first surface is smaller than a distance between the neck and the first surface.

9. The sealing nail according to claim 2, characterized in that: The anti-adhesion portion is arranged in the central area of ​​the plane.

10. A battery cell, characterized in that: include: The end cover is provided with a liquid injection hole; A sealing pin according to any one of claims 1 to 9, wherein the sealing pin is sealed in the injection hole.

11. A battery, characterized in that: Comprising the battery cell as claimed in claim 10.

12. An electrical device, characterized in that: Comprising the battery of claim 11, the battery is used to provide electrical energy.

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