Rivet pulling assembly, box body, battery and electric device

Abstract

The utility model provides a rivet pulling assembly, a box body, a battery and an electric device, and belongs to the technical field of battery production. The rivet pulling assembly comprises a rivet pulling nut, the rivet pulling nut is provided with a mounting hole penetrating in the first direction, and the mounting hole comprises a first hole part and a second hole part which are arranged in the first direction; and the fastener extends into the mounting hole in the direction from the first hole part to the second hole part so as to be connected with the rivet nut in a fastening manner, and the fastener also blocks the second hole part. According to the rivet pulling assembly, the problem that the rivet pulling assembly is prone to rusting in the using process can be effectively solved.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a rivet assembly, a box, a battery and an electrical device. Background Art

[0002] Rivet nuts are commonly used in fastening scenarios in the manufacturing industry such as plates and pipes, for example, in the assembly of batteries. During the assembly process, the rivet nut is inserted into the object to be connected, and then the fastener is screwed into the mounting hole of the rivet nut. By applying a certain pulling force to the fastener, the fastener moves toward the top of the rivet nut. During the movement of the fastener, a certain traction force is generated on the rivet nut, causing the rivet nut to deform and then be riveted to the object.

[0003] At present, the plating layer on the surface of the rivet nut is easy to fall off, which makes the rivet nut easy to rust, thereby affecting the reliability of the use of the rivet nut. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one purpose of the present application is to provide a rivet assembly, a box, a battery and an electrical device to improve the problem that the rivet nut is prone to rust.

[0005] An embodiment of the first aspect of the present application provides a rivet assembly, including: a rivet nut, the rivet nut having a mounting hole extending along a first direction, the mounting hole including a first hole portion and a second hole portion arranged along the first direction; a fastener, extending into the mounting hole along a direction from the first hole portion to the second hole portion to be fastened to the rivet nut, and the fastener also blocks the second hole portion.

[0006] In the technical solution of the embodiment of the present application, the mounting hole passes through the rivet nut along the first direction, so that when the rivet nut is electroplated, the plating solution can flow from the two openings of the mounting hole, so that the metal ions in the plating solution are evenly distributed in various places in the mounting hole as they flow. In this way, a plating layer with a relatively uniform and consistent thickness can be formed at the top and bottom of the mounting hole, thereby improving the problem of rusting of the rivet nut due to the plating layer at the bottom of the mounting hole being too thin and easy to fall off. At the same time, the fastener is fastened to the rivet nut by extending into the mounting hole. After the electroplating is completed, the fastener can not only cooperate with the rivet nut to fix the object to be installed, but also block the second hole portion, so that the mounting hole of the rivet nut forms a blind hole structure, improves the air tightness of the mounting hole, and improves the problem of liquid leakage through the mounting hole during the use of the rivet nut.

[0007] In some embodiments, in a lateral direction perpendicular to the first direction, the maximum cross-sectional area of ​​the second hole portion is smaller than the minimum cross-sectional area of ​​the first hole portion. In this way, the cross-sectional area of ​​the first hole portion is large enough so that the fastener can smoothly extend into the first hole portion to reach the second hole portion, and the cross-sectional area of ​​the second hole portion is small so that the fastener has a better blocking effect on the second hole portion, thereby enhancing the air tightness of the mounting hole.

[0008] In some embodiments, the fastener abuts against the end of the second hole portion close to the first hole portion to block the second hole portion. In this way, the fastener only needs to be extended to abut against the end of the second hole portion so that the fastener covers the upper opening of the second hole portion, which can simplify the assembly method of the fastener and the rivet nut.

[0009] In some embodiments, one end of the fastener extends into the second hole portion, and the inner diameter of the second hole portion is configured to have an interference fit with the fastener extending into the second hole portion, so that the fastener blocks the second hole portion. In this way, the blocking effect of the fastener on the second hole portion can be enhanced, and the air tightness of the mounting hole can be enhanced.

[0010] In some embodiments, the fastener includes: a mounting portion, which extends into the first hole portion to be fastened with the rivet nut; and a sealing portion, which is arranged at one end of the mounting portion and is used to block the second hole portion. Dividing the fastener into the mounting portion and the sealing portion can achieve a good connection performance between the mounting portion and the rivet nut, while the sealing portion also has a good sealing effect on the second hole portion.

[0011] In some embodiments, the sealing part is made of an elastic material, so that the sealing part can adapt to the shape of the second hole and deform to better seal the second hole. In addition, the elastic material is not prone to rust, and can maintain the sealing of the second hole by the sealing part, thereby maintaining good air tightness of the mounting hole.

[0012] In some embodiments, the mounting portion is threadedly connected to the inner wall of the first hole portion. In this way, a traction force between the threads can be generated between the fastener and the rivet nut, thereby rivet the rivet nut, thereby enhancing the fixing effect of the fastener on the rivet nut.

[0013] In some embodiments, the side wall of the rivet nut surrounding the mounting hole includes a deformation zone; the rivet assembly further includes: a protective layer, at least covering the outer wall of the deformation zone. The deformation zone is deformed during the riveting process of the rivet nut, and the protective layer is provided to cover the outer wall of the deformation zone. Even if the coating of the outer wall of the deformation zone falls off after the deformation, the protective layer can protect the outer wall of the deformation zone from rusting, thereby further improving the problem of rusting of the rivet nut due to the shedding of the coating.

[0014] In some embodiments, the outer wall of the deformation zone is provided with a plurality of grooves, and the plurality of grooves are arranged at intervals along the circumference of the deformation zone, and the protective layer fills at least part of the grooves. By providing a plurality of grooves, the strength of the deformation zone is weaker than other areas in the side wall of the rivet nut, and thus it is more likely to deform. The protective layer fills the grooves, and can cut off the leakage path formed through the grooves, thereby reducing the corrosion of the deformation zone and improving the deformation capacity of the deformation zone, while reducing the risk of leakage through the rivet nut, and improving the reliability of the use of the rivet nut.

[0015] In some embodiments, the rivet nut includes: a flange; a connecting portion connected to the flange, and a mounting hole passing through the flange and the connecting portion, wherein the deformation zone is provided at the connecting portion, and the deformation zone is connected to the flange, and a plurality of ribs are provided on the end surface of the flange close to the connecting portion, and the plurality of ribs are arranged at intervals along the circumference of the mounting hole, and the rivet assembly further includes: a sealing layer, which is provided on the end surface of the flange close to the connecting portion and fills at least part of the gap between adjacent ribs. Thus, after the rivet nut is connected to the object to be installed, the risk of leakage from the gap between the ribs and flowing into the interior of the object to be installed along the deformation zone is reduced by the sealing layer, thereby enhancing the sealing performance of the rivet nut connected to the object to be installed.

[0016] In some embodiments, the protective layer also covers at least a portion of the outer wall of the side wall of the rivet nut except the deformation zone. In this way, the protective layer can protect the deformation zone and at least a portion of the side wall outside the deformation zone from being corroded, further improving the problem of rusting of the rivet nut due to the shedding of the coating.

[0017] An embodiment of the second aspect of the present application provides a box body, which includes the rivet assembly in the above embodiment.

[0018] In some embodiments, the box body further includes: a box body; a cover body, the cover body covers the box body to form a storage space for accommodating battery cells together with the box body; the cover body is connected to the box body through a rivet assembly. Since the rivet assembly is not easy to rust, the stability of the connection between the cover body and the box body connected by the rivet assembly is improved. At the same time, the second hole portion of the mounting hole of the rivet nut is blocked by a fastener to improve the air tightness of the mounting hole, which can improve the problem of leakage through the mounting hole, so that the box body provides better protection for the battery cell and maintains the stable performance of the battery cell.

[0019] An embodiment of the third aspect of the present application provides a battery, which includes a battery cell; and the box body in the above embodiment, the box body is used to accommodate the battery cell.

[0020] An embodiment of the fourth aspect of the present application provides a battery, which includes the rivet assembly in the above embodiment.

[0021] An embodiment of the fifth aspect of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0022] 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

[0023] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0024] Figure 1 A schematic diagram of the structure of a battery in some embodiments of the present application;

[0025] Figure 2 It is a front view structural schematic diagram of a rivet assembly according to some embodiments of the present application;

[0026] Figure 3 for Figure 2 One of the cross-sectional structural diagrams in the AA direction;

[0027] Figure 4 It is a front view structural schematic diagram of a rivet nut in a rivet assembly in some embodiments of the present application;

[0028] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure in the BB direction;

[0029] Figure 6 This is a bottom view of the structure of the rivet nut according to some embodiments of the present application;

[0030] Figure 7 It is a front view structural schematic diagram of a fastener in a pull rivet assembly in some embodiments of the present application;

[0031] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure in the CC direction;

[0032] Fig. 9 for Figure 2 The second schematic diagram of the cross-section structure in the AA direction;

[0033] Fig.10 It is a front view structural schematic diagram of the rivet assembly of other embodiments of the present application;

[0034] Fig.11 for Fig.10 Schematic diagram of the cross-sectional structure in the AA direction.

[0035] Description of reference numerals:

[0036] A mounting portion 1021, a sealing portion 1022;

[0037] Battery 100, rivet nut 101, fastener 102,

[0038] Ribs 311, deformation zones 321;

[0039] A first sub-section 411, a second sub-section 412;

[0040] Box body 10, cover body 11, box body 12;

[0041] Battery cell 20;

[0042] Flange 31, connecting portion 32;

[0043] A mounting hole 40, a first hole portion 41, and a second hole portion 42;

[0044] Protective layer 50, sealing layer 51;

[0045] The first direction X. DETAILED DESCRIPTION

[0046] 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.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any deformations thereof are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship 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.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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.

[0053] 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 those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] The anti-corrosion performance of rivet nuts is crucial to their reliability, especially when they are used in battery assembly, where higher requirements are placed on their anti-corrosion performance. If the rivet nuts are not rust-resistant enough or their surface treatment is poor, they may rust in a humid or corrosive environment, which in turn affects the sealing performance and increases the risk of water ingress or corrosion inside the battery box, thus affecting the performance and life of the battery.

[0055] In order to ensure the sealing of the assembly, the rivet nut has a blind hole structure. The blind hole structure means that the bottom of the mounting hole of the rivet nut is a closed structure and the top is an open structure, and the fastener extends into the mounting hole from the opening of the mounting hole. However, when electroplating this structure, due to the large depth-to-width ratio of the mounting hole, the path for the plating liquid to flow to the bottom of the mounting hole is long.

[0056] It is understandable that if the flow path of the electroplating solution is longer, more metal ions will be consumed because the metal ions in the electroplating solution will continuously contact the inner wall of the mounting hole during the flow. In this way, when the electroplating solution flows to the bottom of the mounting hole, the concentration of the metal ions is too low, resulting in insufficient thickness of the plating layer at the bottom of the mounting hole. This will cause the bottom of the mounting hole to easily rust.

[0057] Based on the above considerations, the present application designs a rivet assembly, including: a rivet nut and a fastener, wherein the rivet nut has a mounting hole penetrating along a first direction, and the mounting hole includes a first hole portion and a second hole portion arranged along the first direction. The fastener extends into the mounting hole along a direction from the first hole portion to the second hole portion to be threadedly connected with the rivet nut, and the fastener also blocks the second hole portion.

[0058] Since the mounting hole passes through the rivet nut along the first direction, when the rivet nut is electroplated, the plating solution can flow from the two openings of the mounting hole, so that the metal ions in the plating solution are evenly distributed in various places in the mounting hole as they flow. In this way, a plating layer with a relatively uniform and consistent thickness can be formed at the top and bottom of the mounting hole, thereby improving the problem of rusting of the rivet nut due to the plating layer at the bottom of the mounting hole being too thin and easy to fall off. At the same time, the fastener is fastened to the rivet nut by extending into the mounting hole. After the electroplating is completed, the fastener can not only cooperate with the rivet nut to fix the object to be installed, but also block the second hole portion, so that the mounting hole of the rivet nut forms a blind hole structure, improves the air tightness of the mounting hole, and improves the problem of liquid leakage through the mounting hole during the use of the rivet nut.

[0059] The rivet assembly disclosed in the embodiment of the present application can be used for, but not limited to, battery assembly. The battery can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery disclosed in the present application can be used to form the electrical device, which is conducive to improving the stability of battery performance and battery life.

[0060] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0061] Please refer to Figure 1 , Figure 1 Schematic diagram of the exploded structure of the battery provided in some embodiments of the present application. The battery 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. Among them, the box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a cover body 11 and a box body 12, and the cover body 11 and the box body 12 cover each other, and the cover body 11 and the box body 12 jointly define a storage space for accommodating the battery cell 20. The box body 12 can be a hollow structure with one end open, and the cover body 11 can be a plate-like structure. The cover body 11 covers the open side of the box body 12, so that the cover body 11 and the box body 12 jointly define a storage space; the cover body 11 and the box body 12 can also be hollow structures with one side open, and the open side of the cover body 11 covers the open side of the box body 12. Of course, the box body 10 formed by the cover body 11 and the box body 12 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0062] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in mixed connection, where mixed connection means that the multiple battery cells 20 are connected in series and in parallel. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0063] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0064] refer to Figures 2 to 8 The embodiment of the present application provides a rivet assembly, including: a rivet nut 101, the rivet nut 101 has a mounting hole 40 penetrating along a first direction X, the mounting hole 40 includes a first hole portion 41 and a second hole portion 42 arranged along the first direction X; a fastener 102, extending into the mounting hole 40 along the direction from the first hole portion 41 to the second hole portion 42 to be fastened to the rivet nut 101, and the fastener 102 also blocks the second hole portion 42.

[0065] For example, the fastening connection may include a threaded connection or an interference connection. In the case of an interference connection, the fastener may be formed of an elastic material, and after the fastener extends into the first hole portion and the second hole portion by virtue of its own elastic deformation, the fastener generates pressure on the inner walls of the first hole portion and the second hole portion due to its elastic restoring force, thereby achieving a fastening connection and blocking the second hole portion at the same time.

[0066] In some embodiments, the fastener can be fastened to the first hole portion 41, for example, can be threadedly connected to the inner wall surface of the first hole portion, wherein at least a portion of the inner wall surface of the first hole portion 41 is threaded. The end of the fastener extending into the mounting hole 40 can block the second hole portion 42.

[0067] In other embodiments, the fastener may be fastened to both the first hole portion 41 and the second hole portion 42, for example, may be threadedly connected to the inner wall surface of the first hole portion and the inner wall surface of the second hole portion 42, the inner wall surface of the first hole portion 41 and at least part of the inner wall surface of the second hole portion 42 may be threaded, or may be interference-connected to the first hole portion 41 and the second hole portion 42. The end of the fastener inserted into the mounting hole 40 may block the second hole portion 42.

[0068] refer to Figures 2 to 6 The rivet nut 101 may include a flange 31 and a connecting portion 32, wherein the flange 31 is connected to one end of the connecting portion 32, and the mounting hole 40 passes through the flange 31 and the connecting portion 32. The first direction X may be an extending direction of the connecting portion 32.

[0069] The connecting portion 32 is used to form a connection with the fastener when the rivet nut is installed, and the fastener is used to cooperate with the rivet nut to connect the object to be installed. Exemplarily, at least a portion of the inner wall of the mounting hole 40 provided in the connecting portion 32 may be provided with threads, so that the fastener can extend into the mounting hole 40 of the connecting portion 32 and be threadedly connected to the connecting portion. Exemplarily, the connecting portion 32 may include, but is not limited to, a screw.

[0070] The first hole portion 41 may penetrate the flange 31 and part of the connecting portion 32, the second hole portion 42 may penetrate the remaining part of the connecting portion 32, and the thread of the inner wall surface of the first hole portion 41 is arranged on the connecting portion 32. In other words, the opening of the first hole portion 41 away from the second hole portion 42 may be arranged at the top of the rivet nut 101, and the opening of the second hole portion 42 away from the first hole portion 41 may be arranged at the bottom of the rivet nut 101.

[0071] When the rivet nut 101 is electroplated, the fastener 102 does not extend into the mounting hole 40, so that the plating solution can flow in the mounting hole 40, so that the metal ions in the plating solution are evenly distributed throughout the mounting hole 40 as they flow. In this way, a plating layer with a relatively uniform and consistent thickness can be formed at both the top and bottom of the mounting hole 40, and the plating thickness at the top opening and the bottom opening of the mounting hole 40 is relatively thick.

[0072] After the electroplating is completed, a friction coefficient stabilizer is injected into the mounting hole 40 to reduce and maintain a low friction coefficient inside the mounting hole 40. Since the mounting hole 40 passes through the rivet nut 101, the friction coefficient stabilizer can flow in the mounting hole 40 to be evenly coated on the inner wall surface of the mounting hole 40, which can improve the torque attenuation problem caused by the large fluctuation of the friction coefficient of the inner wall of the mounting hole 40.

[0073] During assembly, the connection portion 32 of the rivet nut 101 can be inserted into the first assembly hole of the first object to be installed, and the flange 31 protrudes from the top opening of the first assembly hole and abuts against the surface of the first object to be installed. The fastener 102 extends into the first hole portion 41 along the direction from the first hole portion 41 to the second hole portion 42. In other words, the fastener 102 extends into the mounting hole 40 from the opening of the flange 31 away from the connection portion 32, and is tightly connected to the mounting hole 40. The top of the fastener 102 protrudes from the top surface of the flange 31. By applying a certain rivet force upward to the top of the fastener 102, the weak position of the rivet nut 101 is deformed, and cooperates with the flange 31 to form a clamping force on the first object to be installed.

[0074] After the fastener 102 leaves the mounting hole, the second assembly hole of the second object to be mounted is aligned with the mounting hole 40, and the top surface of the flange 31 abuts against the assembly surface of the second object to be mounted. Afterwards, the fastener 102 is sequentially inserted into the second assembly hole and the mounting hole 40 to be locked with the connecting portion 32, completing the assembly of the first object to be mounted and the second object to be mounted.

[0075] It is understood that the fastener 102 may include a first end and a second end opposite to each other. After the fastener 102 is inserted into the mounting hole 40, the second end is inserted into the mounting hole 40 and blocks the second hole portion 42. The first end protrudes from the top of the mounting hole 40. For example, after the assembly is completed, the first end of the fastener 102 protrudes from the top of the second assembly hole of the second object to be installed. The fastener 102 blocks the second hole portion 42, which means closing the opening of the second hole portion 42.

[0076] Since the fastener 102 blocks the second hole 42, the mounting hole 40 is equivalent to a blind hole structure, thereby reducing the risk of liquid leakage through the second hole 42. In this way, when the rivet assembly is used to assemble the battery box, the risk of water ingress or corrosion inside the box through the mounting hole 40 can be reduced, which is conducive to maintaining the performance and life of the battery.

[0077] In the above technical solution, the electroplating liquid can flow from the two openings of the mounting hole 40, so that the plating thickness at the top opening and the bottom opening of the mounting hole 40 is thicker, thereby improving the problem of easy detachment of the plating and thus causing corrosion of the rivet nut 101. At the same time, after the electroplating is completed, the fastener 102 can not only play the role of riveting the rivet nut 101, but also block the second hole portion 42 during the use of the rivet nut 101, so that the mounting hole 40 of the rivet nut 101 forms a blind hole structure, ensuring the airtightness of the mounting hole 40, and improving the problem of liquid leakage through the mounting hole 40 during the use of the rivet nut 101.

[0078] According to some embodiments of the present application, in a lateral direction perpendicular to the first direction X, a maximum cross-sectional area of ​​the second hole portion 42 is smaller than a minimum cross-sectional area of ​​the first hole portion 41 .

[0079] In the lateral direction perpendicular to the first direction X, the cross-sectional shape of the mounting hole 40 can be circular, and the maximum inner diameter of the second hole portion 42 is smaller than the minimum inner diameter of the first hole portion 41, so that the maximum cross-sectional area of ​​the second hole portion 42 is smaller than the minimum cross-sectional area of ​​the first hole portion 41.

[0080] refer to Figure 5 In some embodiments, the first hole portion 41 may include a first sub-portion 411 and a second sub-portion 412 connected and connected along the first direction X, the first sub-portion 411 penetrates the flange 31 and part of the connecting portion 32, the second sub-portion 412 is connected to the second hole portion 42, and they penetrate the remaining part of the connecting portion 32 together, and the inner wall surface of the second sub-portion 412 is provided with a thread. In the transverse direction perpendicular to the first direction X, the cross-sectional area of ​​the first sub-portion 411 may be greater than the cross-sectional area of ​​the second sub-portion 412, and the cross-sectional area of ​​the second hole portion 42 is smaller than the cross-sectional area of ​​the second sub-portion 412. In this way, the wall thickness of the connecting portion 32 corresponding to the first sub-portion 411 is smaller than the wall thickness of the connecting portion 32 corresponding to the second sub-portion 412 and the second hole portion 42. When the rivet nut 101 is riveted, the connecting portion 32 corresponding to the first sub-portion 411 will be deformed, and then clamp the object to be installed together with the flange 31.

[0081] When the second end of the fastener 102 blocks the second hole portion 42, if the cross-sectional area of ​​the second hole portion 42 is too large and the cross-sectional area of ​​the second sub-portion 412 is too small, in order for the second end of the fastener 102 to block the second hole portion 42, the second end of the fastener 102 needs to be set to a larger size, which may cause the fastener 102 to be unable to extend into the second sub-portion 412.

[0082] Based on the above considerations, in the above technical solution, the maximum cross-sectional area of ​​the second hole portion 42 is set smaller than the minimum cross-sectional area of ​​the first hole portion 41, so that when the fastener 102 is smoothly inserted into the first hole portion 41, it has a sufficiently large size to block the second hole portion 42, thereby enhancing the air tightness of the mounting hole 40.

[0083] It is understandable that, in other embodiments, the cross-sectional area of ​​the second hole portion 42 may also be equal to the cross-sectional area of ​​the first hole portion 41. Exemplarily, the second end of the fastener 102 may be made of an elastic material, and the fastener 102 may extend into the first hole portion 41 and the second hole portion 42 by utilizing its elastic deformation ability, and after extending into the second hole portion 42, it may utilize its elastic restoring force to achieve interference fit with the second hole portion 42, thereby achieving blocking of the second hole portion 42.

[0084] refer to Figure 3 According to some embodiments of the present application, the fastener 102 abuts against the end of the second hole portion 42 close to the first hole portion 41 to block the second hole portion 42 .

[0085] That is, the fastener 102 does not extend into the second hole portion 42 , but is located outside the opening of the second hole portion 42 close to the first hole portion 41 and covers the opening.

[0086] It can be understood that, since the maximum cross-sectional area of ​​the second hole portion 42 is smaller than the minimum cross-sectional area of ​​the first hole portion 41 in the lateral direction perpendicular to the first direction X, an interface is formed at the intersection of the first hole portion 41 and the second hole portion 42. Figure 3 As shown in FIG. 8 , the fastener 102 may abut against the interface to block the second hole portion 42 .

[0087] In some embodiments, the second end of the fastener 102 may be made of an elastic material, so that the second end of the fastener 102 can adapt to the shape of the second hole portion 42 and deform, thereby achieving a better blocking effect on the second hole portion 42. In other embodiments, the second end of the fastener 102 may also be supported by a non-elastic material, and when the interface between the first hole portion 41 and the second hole portion 42 is flat, the opening of the second hole portion 42 can also be covered, thereby achieving a better blocking effect on the second hole portion 42.

[0088] In the above technical solution, the fastener 102 only needs to be extended until it abuts against the end of the second hole portion 42 so that the fastener 102 covers the upper opening of the second hole portion 42, which can simplify the assembly method of the fastener 102 and the rivet nut 101. In addition, during the processing of the rivet assembly, it is only necessary to control the cross-sectional area of ​​the second hole portion 42 to be smaller than the size of one end of the fastener 102, without considering the matching degree between the second hole portion 42 and the end size of the fastener 102, which can reduce the manufacturing difficulty of the rivet assembly.

[0089] refer to Fig. 9 According to some embodiments of the present application, one end of the fastener 102 extends into the second hole portion 42 , and the inner diameter of the second hole portion 42 is configured to have an interference fit with the fastener 102 extending into the second hole portion 42 , so that the fastener 102 blocks the second hole portion 42 .

[0090] Interference fit refers to utilizing the elasticity of one end of the fastener 102 so that one end of the fastener 102 can extend into the second hole portion 42. One end of the fastener 102 extending into the second hole portion 42 undergoes elastic deformation due to the elastic restoring force, so that the fastener 102 generates pressure on the inner wall of the second hole portion 42, and the fastener 102 can achieve the effect of blocking the second hole portion 42.

[0091] In some embodiments, the entire end of the fastener 102 for inserting into the second hole 42 may be elastic. In other embodiments, only the peripheral portion of the end of the fastener 102 for inserting into the second hole 42 may be elastic.

[0092] It is understandable that due to the pressure between the fastener 102 and the inner wall of the second hole portion 42 , the fastener 102 has a better sealing effect on the second hole portion 42 , and can better isolate water vapor from passing through the second hole portion 42 .

[0093] In the above technical solution, one end of the fastener 102 is extended into the second hole portion 42 and is interference fit with the second hole portion 42 , which can enhance the sealing effect of the fastener 102 on the second hole portion 42 and enhance the air tightness of the mounting hole 40 .

[0094] refer to Figure 3 , Figures 7 to 9 According to some embodiments of the present application, the fastener 102 includes: a mounting portion 1021, which extends into the first hole portion 41 to be fastened to the rivet nut 101; and a sealing portion 1022, which is arranged at one end of the mounting portion 1021 and is used to seal the second hole portion 42.

[0095] The mounting portion 1021 may be made of a rigid material, so that the mounting portion 1021 and the rivet nut 101 have a high connection strength, making it easy to rivet the rivet nut 101 .

[0096] In some embodiments, the sealing portion 1022 and the mounting portion 1021 may be two separate structures connected together by bonding or other methods.

[0097] In other embodiments, the sealing portion 1022 and the mounting portion 1021 may also be an integrated structure to enhance the connection strength between the sealing portion 1022 and the mounting portion 1021 .

[0098] In some embodiments, along the arrangement direction perpendicular to the mounting portion 1021 and the sealing portion 1022, the cross-sectional area of ​​the sealing portion 1022 may be smaller than the cross-sectional area of ​​the mounting portion 1021, and the cross-sectional area of ​​the sealing portion 1022 is larger than the cross-sectional area of ​​the second hole portion 42, so that the sealing portion 1022 can smoothly extend into the first hole portion 41 and block the second hole portion 42.

[0099] In the above technical solution, the fastener 102 is divided into a mounting portion 1021 and a sealing portion 1022 , so that the mounting portion 1021 and the rivet nut 101 have good connection performance, and the sealing portion 1022 also has a good sealing effect on the second hole portion 42 .

[0100] According to some embodiments of the present application, the sealing portion 1022 is made of an elastic material.

[0101] In some embodiments, the elastic material constituting the sealing portion 1022 may be other elastic materials such as resin. In other embodiments, the elastic material constituting the sealing portion 1022 may also be rubber, for example, natural rubber, nitrile rubber, chloroprene rubber, silicone rubber, etc.

[0102] In some embodiments, the material of the mounting portion 1021 is metal. The mounting portion 1021 and the rubber may be subjected to a vulcanization process, and the sulfur atoms will combine with the active metal atoms on the surface of the mounting portion 1021 to form a chemical bond, and this chemical bond makes the rubber and the mounting portion 1021 very firmly bonded, and while achieving a better blocking effect on the second hole portion 42, the connection strength between the mounting portion 1021 and the sealing portion 1022 is enhanced, so that the fastener 102 can maintain the blocking effect on the second hole portion 42 during the assembly process of the rivet nut 101.

[0103] For example, a vulcanizing agent may be added to the rubber compound, and the rubber compound with the vulcanizing agent added thereto is used to bond the mounting portion 1021 to the rubber. During the bonding process, the rubber compound and the surface of the mounting portion 1021 are hot pressed together, so that the vulcanizing agent in the rubber compound reacts with the surface of the mounting portion 1021 to form a strong bond.

[0104] In some embodiments, the material of the sealing portion 1022 may be EPDM (Ethylene Propylene Diene Monomer).

[0105] In the above technical solution, the sealing portion 1022 is an elastic material, which can adapt to the shape of the second hole portion 42 and deform to better seal the second hole portion 42. In addition, the elastic material is not easy to rust, and can maintain the sealing portion 1022 to seal the second hole portion 42, thereby maintaining good air tightness of the mounting hole 40.

[0106] According to some embodiments of the present application, the mounting portion 1021 is threadedly connected to the inner wall of the first hole portion 41 .

[0107] The mounting portion has an external thread, and the external thread of the mounting portion matches the thread of the inner wall surface of the first hole portion 41 to achieve a threaded connection between the mounting portion 1021 and the rivet nut 101 .

[0108] Exemplarily, the mounting portion may include but is not limited to structures such as bolts and screws. When the mounting portion is a bolt or a screw, the bottom of the mounting portion may be vulcanized to bond the rubber to form a sealing portion 1022 disposed at one end of the mounting portion 1021 .

[0109] In the above technical solution, a traction force between the threads of the fastener 102 and the rivet nut 101 can be generated, thereby riveting the rivet nut 101 and enhancing the fixing effect of the fastener 102 on the rivet nut 101.

[0110] refer to Fig.10 as well as Fig.11 According to some embodiments of the present application, the side wall of the rivet nut 101 surrounding the mounting hole 40 includes a deformation zone 321; the rivet assembly also includes: a protective layer 50, at least covering the outer wall of the deformation zone 321.

[0111] The deformation zone 321 refers to a relatively weak area in the side wall of the rivet nut. When the rivet nut 101 is riveted, the deformation zone is deformed due to the small wall thickness and clamps the object to be installed together with the flange 31.

[0112] In some embodiments, the maximum wall thickness of the deformation zone 321 may be smaller than the minimum wall thickness of the remaining areas of the side wall of the rivet nut 101 except the deformation zone 321, thereby making the deformation zone 321 a weak area.

[0113] In other embodiments, the wall thickness of the deformation zone may be the same as the wall thickness of the remaining areas of the rivet nut side wall except the deformation zone, the deformation zone may be provided with hollow holes, or the material strength of the deformation zone is lower than the material strength of the remaining areas of the rivet nut side wall except the deformation zone, so that the deformation zone is easier to deform.

[0114] Exemplarily, the deformation zone 321 may be disposed on the connection portion 32 , the inner wall of the deformation zone 321 may not be provided with threads, and a portion of the connection portion 32 other than the deformation zone 321 may be provided with threads.

[0115] The protective layer 50 may be disposed around the outer wall of the deformation zone 321 to cover the outer wall of the deformation zone 321 , thereby preventing water vapor from corroding the outer wall of the deformation zone 321 , thereby preventing the outer wall of the deformation zone 321 from rusting.

[0116] In some embodiments, the material of the protective layer 50 may include but is not limited to at least one of rubber, silicone, elastic-plastic sealant, thermoplastic material or resin, etc. Exemplarily, the material of the protective layer 50 may be ethylene propylene copolymer (EPM) or polyvinyl chloride (PVC).

[0117] In some embodiments, after the rivet nut 101 is electroplated, liquid elasto-plastic sealant or silicone may be sprayed on the outer wall of the deformation zone 321 . After heating, the liquid elasto-plastic sealant or silicone may solidify to form a protective layer 50 .

[0118] In the above technical solution, the deformation zone 321 is easily deformed during the riveting process of the rivet nut 101. A protective layer 50 is provided to cover the outer wall of the deformation zone 321. Even if the coating on the outer wall of the deformation zone 321 falls off after deformation, the protective layer 50 can protect the outer wall of the deformation zone 321 from rusting, thereby further improving the problem of rusting of the rivet nut 101 due to the shedding of the coating.

[0119] refer to Fig.10 as well as Fig.11 According to some embodiments of the present application, the outer wall of the deformation zone 321 is provided with a plurality of grooves, and the plurality of grooves are arranged at intervals along the circumference of the deformation zone 321 , and the protective layer 50 fills at least part of the grooves.

[0120] It is worth noting that in order to show the positional relationship between the protective layer and the multiple grooves on the outer wall of the deformation zone, Fig.10 The protective layer shown in the figure has a certain degree of transparency. In fact, the protective layer can be made of a material with a certain degree of transparency or a non-transparent material.

[0121] When the rivet nut 101 is assembled, the flange 31 protrudes from the top opening of the assembly hole of the object to be installed and abuts against the surface of the object to be installed. If the gap between the flange 31 and the surface of the object to be installed is large, liquid may leak from the gap and flow along the grooves to the inside of the object to be installed, so that each groove forms a leakage path.

[0122] Based on the above considerations, the embodiment of the present application provides a protective layer 50 to fill the groove, which can block the above leakage path.

[0123] In some embodiments, the protection layer 50 may surround a portion of the circumference of the deformation region 321 to fill at least a portion of each groove.

[0124] In some other embodiments, the protection layer 50 may also surround the circumference of all deformation regions 321 to fill the entirety of each groove.

[0125] In some embodiments, the groove may extend along the first direction X.

[0126] In the above technical solution, by setting a plurality of grooves, the strength of the deformation zone 321 is made weaker than other areas in the side wall of the rivet nut, and thus it is more prone to deformation. The protective layer 50 fills the grooves, which can cut off the leakage path formed by the grooves, thereby reducing the rust of the deformation zone 321 and improving the deformation capacity of the deformation zone 321, while reducing the risk of leakage through the rivet nut 101, thereby improving the reliability of the use of the rivet nut 101.

[0127] It can be understood that, in other embodiments, the outer wall of the deformation zone 321 may also be a smooth outer wall.

[0128] According to some embodiments of the present application, the rivet nut includes: a flange 31; a connecting portion 32, connected to the flange 31, and a mounting hole 40 passes through the flange 31 and the connecting portion 32, wherein a deformation zone 321 is provided on the connecting portion 32, and the deformation zone 321 is connected to the flange 31, and a plurality of ribs 311 are provided on the end surface of the flange 31 close to the connecting portion 32, and the plurality of ribs 311 are arranged at intervals along the circumference of the mounting hole, and the rivet assembly also includes: a sealing layer 51, which is provided on the end surface of the flange 31 close to the connecting portion 32 and fills at least part of the gap between adjacent ribs 311.

[0129] It is worth noting that in order to show the positional relationship between the sealing layer and the ribs, Fig.10 The sealing layer shown in the figure has a certain degree of transparency. In fact, the sealing layer can be made of a material with a certain degree of transparency or a non-transparent material.

[0130] It can be understood that after the sealing layer 51 fills the gaps between adjacent ribs 311, it can reduce the leakage from the gaps between adjacent ribs 311, and when the protective layer 50 fills the grooves in the deformation zone, it can reduce or even cut off the leakage path of the liquid flowing along the grooves in the deformation zone to the interior of the object to be installed.

[0131] The sealing layer 51 may fill part of the gap between every two adjacent ribs 311 , or may fill the entire gap between every two adjacent ribs 311 .

[0132] In some embodiments, the material of the sealing layer 51 may include but is not limited to at least one of rubber, silicone, elastic-plastic sealant, thermoplastic material or resin. Exemplarily, the material of the sealing layer 51 may be EPM or PVC. In this way, the sealing layer 51 is elastic, and during the riveting process of the rivet nut, a certain clamping force is formed between the end face of the flange 31 close to the connecting portion 32 and the surface of the object to be installed, and the sealing layer 51 is clamped between the flange 31 and the surface of the object to be installed. The sealing layer 51 undergoes a certain elastic deformation, which can better fill the gap between adjacent ribs 311 to reduce the leakage path.

[0133] In some embodiments, the protection layer 50 and the sealing layer 51 may be integrally formed.

[0134] In other embodiments, the protection layer 50 and the sealing layer 51 may also be two independent structures.

[0135] In the above technical solution, after the rivet nut is connected to the object to be installed, the risk of liquid leakage from the gaps between the ribs 311 and flowing into the interior of the object to be installed along the deformation zone 321 can be reduced by the sealing layer 51, thereby enhancing the sealing of the rivet nut 101 connected to the object to be installed.

[0136] According to some embodiments of the present application, the protective layer 50 also covers at least a portion of the outer wall of the side wall of the rivet nut except the deformation zone 321 .

[0137] In some embodiments, the deformation zone 321 is provided in the connection portion 32 , and the protective layer 50 may also cover at least a portion of the outer wall of the connection portion 32 except the deformation zone 321 , or may also cover at least a portion of the outer wall of the flange 31 .

[0138] Exemplarily, the protective layer 50 may cover the entire outer wall of the connecting portion 32 to protect the entire outer wall of the connecting portion 32 and prevent water vapor from corroding the entire outer wall of the connecting portion 32 .

[0139] In some embodiments, in the same process step, liquid elastoplastic sealant or silicone can be sprayed on the outer wall of the deformation zone 321 and the outer wall of at least a portion of the side wall of the rivet nut except the deformation zone 321. After heating, the liquid elastoplastic sealant or silicone is cured to form a protective layer 50.

[0140] In the above technical solution, the protective layer 50 can protect the deformation zone 321 and at least part of the side walls outside the deformation zone from being corroded, further improving the problem of rusting of the rivet nut 101 due to the shedding of the coating.

[0141] An embodiment of the present application provides a box body, which includes the rivet assembly in the above embodiment.

[0142] For the structure of the box body, reference may be made to the description in the above embodiment, which will not be repeated here.

[0143] In some embodiments, the rivet assembly can be used to connect the box body and the cover body in the box. By improving the anti-corrosion performance of the rivet assembly, the stability of the rivet assembly connecting the box body and the cover body can be increased, thereby increasing the overall structural stability of the box.

[0144] According to some embodiments of the present application, the box body further includes: a box body; a cover body, the cover body covers the box body to together with the box body form a accommodating space for accommodating battery cells; the cover body is connected to the box body by a rivet assembly.

[0145] Exemplarily, the box body can be the first object to be installed in the above embodiment, and the cover body can be the second object to be installed in the above embodiment. Regarding the way in which the rivet assembly assembles the first object to be installed and the second object to be installed, reference can be made to the relevant description in the above embodiment, and will not be repeated here.

[0146] Since the rivet assembly is not easy to rust, the stability of the connection between the cover body and the box body connected by the rivet assembly is greatly improved. At the same time, the second hole portion 42 of the mounting hole 40 of the rivet nut 101 is blocked by the fastener 102 to improve the airtightness of the mounting hole 40, which can improve the problem of liquid leakage through the mounting hole 40, so that the box body provides better protection for the battery cell and maintains the stable performance of the battery cell.

[0147] An embodiment of the present application provides a battery, which includes a battery cell; and the box body in the above embodiment, the box body is used to accommodate the battery cell.

[0148] For the structure of the battery and the structure of the battery cells and the box body in the battery, reference may be made to the relevant description in the above embodiments, which will not be repeated here.

[0149] An embodiment of the present application provides a battery, which includes the rivet assembly in the above embodiment.

[0150] The pull rivet assembly can be used for the assembly between any two parts of the battery that need to be sealed, including but not limited to the assembly of the box body and the assembly connection between the structures inside the box body.

[0151] An embodiment of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0152] For the electrical device, reference may be made to the relevant description in the above embodiments, which will not be described again here.

[0153] The present application embodiment provides a rivet assembly, referring to Fig.10 as well as Fig.11 The rivet assembly includes a rivet nut 101 and a fastener 102. The rivet nut 101 has a mounting hole 40 penetrating along a first direction X. The mounting hole 40 includes a first hole portion 41 and a second hole portion 42 arranged along the first direction X. At least part of the inner wall surface of the first hole portion 41 is provided with threads. The fastener 102 extends into the first hole portion 41 along the direction from the first hole portion 41 to the second hole portion 42 to be threadedly connected with the rivet nut 101. The fastener 102 also blocks the second hole portion 42.

[0154] The rivet nut 101 may include a flange 31 and a screw, wherein the flange 31 is connected to one end of the screw, and the mounting hole 40 passes through the flange 31 and the screw. The first direction X may be the extending direction of the screw. The first hole portion 41 may pass through the flange 31 and a portion of the screw, the thread of the inner wall surface of the first hole portion 41 is provided on the screw, and the second hole portion 42 passes through the remaining portion of the screw.

[0155] In a lateral direction perpendicular to the first direction X, the maximum cross-sectional area of ​​the second hole portion 42 is smaller than the minimum cross-sectional area of ​​the first hole portion 41 .

[0156] The fastener 102 abuts against the end of the second hole portion 42 close to the first hole portion 41 to block the second hole portion 42. The fastener 102 includes: a mounting portion 1021, which is threadedly connected to the rivet nut 101; and a sealing portion 1022, which is arranged at one end of the mounting portion 1021 and is used to block the second hole portion 42. The mounting portion 1021 is a bolt, and the material of the sealing portion 1022 is rubber. The rubber and the mounting portion 1021 are bonded by a vulcanization process. The material of the sealing portion 1022 can be EPDM.

[0157] The rivet nut 101 has a deformation zone arranged on the screw rod, the wall thickness of the deformation zone is less than the wall thickness of other regions of the screw rod except the deformation zone, and the rivet assembly further includes a protective layer 50, which at least covers the outer wall of the deformation zone. The material of the protective layer 50 can be EPM or PVC.

[0158] The outer wall of the deformation zone may be provided with a plurality of grooves, the grooves extending along the first direction X, and the plurality of grooves are arranged at intervals along the circumference of the deformation zone 321 , and the protective layer 50 fills the grooves.

[0159] 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 pull rivet assembly, characterized in that: include: A rivet nut, wherein the rivet nut has a mounting hole extending through the rivet nut in a first direction, wherein the mounting hole includes a first hole portion and a second hole portion arranged in the first direction; A fastener extends into the mounting hole along a direction from the first hole portion to the second hole portion to be fastened with the rivet nut, and the fastener also blocks the second hole portion.

2. The pull rivet assembly according to claim 1, characterized in that: In a lateral direction perpendicular to the first direction, a maximum cross-sectional area of ​​the second hole portion is smaller than a minimum cross-sectional area of ​​the first hole portion.

3. The pull rivet assembly according to claim 2, characterized in that: The fastener abuts against an end of the second hole portion close to the first hole portion to block the second hole portion.

4. The pull rivet assembly according to claim 2, characterized in that: One end of the fastener extends into the second hole portion, and the inner diameter of the second hole portion is configured to be interference fit with the fastener extending into the second hole portion, so that the fastener blocks the second hole portion.

5. The pull rivet assembly according to any one of claims 1 to 4, characterized in that: The fastener comprises: A mounting portion, the mounting portion extending into the first hole portion to be fastened to the rivet nut; A sealing portion is arranged at one end of the mounting portion and is used for sealing the second hole portion.

6. The pull rivet assembly according to claim 5, characterized in that: The sealing part is made of elastic material.

7. The pull rivet assembly according to claim 5, characterized in that: The mounting portion is threadedly connected to the inner wall of the first hole portion.

8. The pull rivet assembly according to any one of claims 1 to 4, characterized in that: The side wall of the rivet nut arranged around the mounting hole includes a deformation zone; The pull rivet assembly also includes: The protective layer at least covers the outer wall of the deformation zone.

9. The pull rivet assembly according to claim 8, characterized in that: The outer wall of the deformation zone is provided with a plurality of grooves, the plurality of grooves are arranged at intervals along the circumference of the deformation zone, and the protective layer fills at least a portion of the grooves.

10. The pull rivet assembly according to claim 9, characterized in that: The rivet nut comprises: Flange; The connecting part is connected to the flange, and the mounting hole passes through the flange and the connecting part, wherein: The deformation zone is provided at the connection portion, and the deformation zone is connected to the flange, and a plurality of ribs are provided on the end surface of the flange close to the connection portion, and the plurality of ribs are arranged at intervals along the circumference of the mounting hole, and the rivet assembly further includes: A sealing layer is provided on an end surface of the flange close to the connecting portion and fills at least a portion of the gap between adjacent ribs.

11. The pull rivet assembly according to claim 8, characterized in that: The protective layer also covers at least a portion of the outer wall of the side wall of the rivet nut except the deformation zone.

12. A box, characterized in that: The invention comprises a rivet assembly as claimed in any one of claims 1 to 11.

13. The box according to claim 12, characterized in that: The box also includes: Box body; A cover body, the cover body covers the box body to form a storage space for storing battery cells together with the box body; The cover body is connected to the box body through the rivet assembly.

14. A battery, characterized in that: include: Battery cells; as well as The box as claimed in claim 12 or 13, wherein the box is used to accommodate the battery monomer.

15. A battery, characterized in that: The invention comprises a rivet assembly as claimed in any one of claims 1 to 11.

16. An electrical device, characterized in that: Comprising a battery as claimed in claim 14 or 15, the battery is used to provide electrical energy.

Images