Top cover assembly and battery

Abstract

The utility model discloses a top cover assembly and a battery, and belongs to the technical field of batteries. The top cover assembly comprises a top cover body and a pole, and a mounting through hole is formed in the top cover body and is a polygonal hole; the pole comprises a main body part, an inserting part and a clamping part, the main body part is arranged on the inner side of the top cover body, and at least part of the projection of the main body part on the top cover body is overlapped with the top cover body; the inserting part is connected with the main body part and is inserted into the mounting through hole, and the clamping part is connected to the inserting part and is arranged on the outer side of the top cover body; the shape of the clamping part is the same as that of the mounting through hole, and the projection part of the clamping part on the top cover body falls outside the mounting through hole. According to the top cover assembly, the push-and-pull pressure bearing capacity of the pole is relatively high, and the pole can be prevented from being deformed or broken when being subjected to external force, so that the mechanical stability and the use safety of the battery are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a top cover assembly and battery. BACKGROUND

[0002] With the rapid development of science and technology, electronic products are increasingly popular, from smart phones, tablet computers to electric vehicles, batteries as the core power source of these devices, its performance and safety are directly related to the overall performance and user experience of the product. The pole column on the battery top cover is a key component for connecting the battery and external equipment, and its stability is particularly important. However, the tensile and compressive strength of the pole column on the top cover in the prior art is insufficient, which may cause the pole column to deform or break when subjected to external force, which not only affects the mechanical stability of the battery, but also may cause safety hazards.

[0003] Therefore, there is an urgent need for a top cover assembly to solve the above problems. SUMMARY

[0004] The utility model discloses a top cover assembly and battery can improve the push-pull pressure capacity of the pole column, avoid its deformation or breakage when subjected to external force, thereby guaranteeing the mechanical stability and use safety of the battery.

[0005] In order to achieve the above target, the utility model adopts the following technical scheme:

[0006] A top cover assembly, comprising:

[0007] A top cover body, provided with a mounting hole thereon, the mounting hole is a polygonal hole;

[0008] A pole column, comprising a main body part, a plug-in part and a clamping part, the main body part is arranged on the inner side of the top cover body, the projection of the main body part on the top cover body at least partially overlaps the top cover body; the plug-in part is connected with the main body part and inserted into the mounting hole, the clamping part is connected to the plug-in part and arranged on the outer side of the top cover body; the shape of the clamping part is the same as that of the mounting hole, and the projection of the clamping part on the top cover body falls outside the mounting hole.

[0009] As a preferred scheme of the top cover assembly provided by the utility model, the pole column is an integral structure, and the side length of the clamping part is less than or equal to the side length of the mounting hole.

[0010] As a preferred scheme of the top cover assembly provided by the utility model, the main body part is detachably connected to the plug-in part; and / or the clamping part is detachably connected to the plug-in part.

[0011] As a preferred scheme of the utility model provides, the top cover body is provided with at least one limiting piece for limiting the rotation of the clamping portion relative to the plug-in portion.

[0012] As a preferred scheme of the utility model provides, the top cover body is provided with at least one limiting piece for limiting the rotation of the clamping portion relative to the plug-in portion.

[0013] As a preferred scheme of the utility model provides, the top cover body is provided with at least one limiting piece for limiting the rotation of the clamping portion relative to the plug-in portion.

[0014] As a preferred scheme of the utility model provides, the top cover body is provided with at least one limiting piece for limiting the rotation of the clamping portion relative to the plug-in portion.

[0015] As a preferred scheme of the utility model provides, the top cover body is provided with at least one limiting piece for limiting the rotation of the clamping portion relative to the plug-in portion.

[0016] As a preferred scheme of the utility model provides, the top cover body is provided with at least one limiting piece for limiting the rotation of the clamping portion relative to the plug-in portion.

[0017] The utility model also provides a kind of battery, including shell, electric core and the top cover assembly as described above, the shell has opening in one side, the electric core is arranged in the shell, the top cover assembly blocks the opening, the tab of the electric core is electrically connected with the pole of the top cover assembly.

[0018] The utility model has the advantages that:

[0019] The top cover assembly provided by the utility model is connected by the main body portion, the plug-in portion and the clamping portion, wherein the projection of the main body portion on the top cover body at least partially covers the mounting hole, i.e. the main body portion can form a clamping structure with the top cover body to limit the pole in the axial direction, avoiding the pole from being pulled out of the mounting hole under the action of external force; by setting the shapes of the mounting hole and the clamping portion as polygons, and the projection of the clamping portion on the top cover body falls outside the mounting hole, the clamping portion forms a clamping structure with the top cover body to further limit the pole in the axial direction, avoiding the pole from being pressed into the mounting hole under the action of large thrust; by the above setting, the push-pull pressure capacity of the pole can be improved, avoiding deformation or fracture of the pole when subjected to external force, thereby ensuring the mechanical stability and use safety of the battery.

[0020] In addition, the pole can be prepared by various processing techniques, improving the flexibility of production to meet different manufacturing needs and improving the processing and assembly efficiency.

[0021] The battery provided by the utility model can improve the push-pull pressure capacity of the pole, avoid deformation or fracture of the pole when the pole is subjected to external force, and ensure mechanical stability and use safety of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the utility model and the drawings.

[0023] Figure 1 is a top view structural schematic diagram of the top cover assembly provided by the embodiment one of the utility model;

[0024] Figure 2 is a partial structural schematic diagram of Figure 1 ;

[0025] Figure 3 is a sectional schematic diagram at A-A of Figure 1 ;

[0026] Figure 4 is a partial enlarged view at B of Figure 3 ;

[0027] Figure 5 is a sectional view structural schematic diagram of the pole provided by the embodiment one of the utility model;

[0028] Figure 6 is an explosion structural schematic diagram of the pole provided by the embodiment two of the utility model;

[0029] Figure 7 is an assembly structural schematic diagram of the pole provided by the embodiment two of the utility model;

[0030] Figure 8 is an explosion structural schematic diagram of the pole provided by the embodiment three of the utility model;

[0031] Figure 9 is an assembly structural schematic diagram of the pole provided by the embodiment three of the utility model.

[0032] REFERENCE SIGNS:

[0033] 100, top cover body; 101, mounting through hole; 102, annular protrusion; 103, accommodating groove;

[0034] 200, pole; 210, main body part; 220, plug-in part; 230, clamping part;

[0035] 300, seal; 400, stopper;

[0036] 500, first gap; 600, second gap. DETAILED DESCRIPTION

[0037] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0038] In the present application, the terms "comprise", "contain", "have" or any other variant thereof are intended to cover non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0039] In the present application, the term "and / or" is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects are in a "and / or" relationship.

[0040] In the present application, the terms "connection", "combination", "coupling" and "installation" can be direct connection, combination, coupling or installation, or indirect connection, combination, coupling or installation. Among them, the direct connection means that two parts or components are connected together without setting intermediate parts, and the indirect connection means that two parts or components are connected with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0041] In the present utility model, the person skilled in the art will understand that the relative terms (for example, "about", "approximately", "substantially" and the like) used in connection with a quantity or condition are intended to include the stated value and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with a measurement of a particular value, the tolerance caused by manufacturing, assembly, use, and the like associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. The relative terms can refer to a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value plus or minus. The numerical values not using the relative terms should also be disclosed as the specific values with tolerances. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) plus or minus on the basis of the indicated angle.

[0042] In the present utility model, the person skilled in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or a combination of multiple parts.

[0043] In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the present utility model. In addition, it should also be understood in the context that when referring to one element connected to another element "on" or "under", it can not only be directly connected to another element "on" or "under", but also indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "rear" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the lower side, the lower left side, the lower right side, the lower front side and the lower rear side, etc.

[0044] Embodiment one

[0045] The present embodiment provides a battery, which comprises a shell, an electric core and a top cover assembly. The shell has an opening on one side, the electric core is arranged in the shell, and the top cover assembly is sealed to the opening of the shell to ensure the sealing of the battery. In the present embodiment, the battery is a square cell. The shell is substantially a long rectangular cavity structure with one end open, and the electric core can be placed into the inner cavity of the shell from the opening of the shell. However, the pulling and pushing strength of the pole column on the top cover in the prior art is insufficient, which may cause the pole column to deform or break when subjected to external force, which not only affects the mechanical stability of the battery, but also may cause safety hazards.

[0046] Figure 1 A top view structural schematic diagram of the top cover assembly provided by the present embodiment is shown.Figure 2 A partial structure schematic diagram of the top cover assembly is shown. Figure 1 A partial structure schematic diagram of the top cover assembly is shown. Figures 1-2 As shown in the drawings, the embodiment further provides a top cover assembly, which comprises a top cover body 100 and two polar posts 200, the top cover body 100 is sealed at the opening of the shell, the top cover body 100 is provided with two mounting through holes 101, the two mounting through holes 101 are arranged along the length direction of the top cover body 100; the two polar posts 200 are respectively mounted in the two mounting through holes 101. Specifically, the electric core comprises two polar tabs with opposite polarities, each polar tab corresponds to one polar post 200; one end of the polar post 200 is arranged at the inner side of the top cover body 100 and is electrically connected with the polar tab with the same polarity, the other end of the polar post 200 extends out of the mounting through hole 101, so as to be connected with the bus bar and other components outside the battery, thereby realizing the current conduction between the electric core and the external structure. In some embodiments, the polar tab is directly welded with the polar post 200 with the same polarity. In other embodiments, the polar tab is first welded with a adapter sheet, and then welded with the polar post 200 with the same polarity through the adapter sheet.

[0047] It should be noted that, in the embodiment, the inner side of the top cover body 100 refers to the side of the top cover body 100 facing the inside of the shell, that is, the side of the top cover body 100 facing the electric core. The outer side of the top cover body 100 refers to the side of the top cover body 100 facing the outside of the battery, that is, the side of the top cover body 100 away from the electric core.

[0048] Figure 3 A partial structure schematic diagram of the top cover assembly is shown. Figure 1 A cross-sectional schematic diagram at A-A is shown. Figure 4 A partial structure schematic diagram of the top cover assembly is shown. Figure 3 A partial enlarged view at B is shown. Figure 5 A cross-sectional structure schematic diagram of the polar post 200 provided by the embodiment is shown. As shown in the drawings, Figures 3-5 and in combination with Figure 2 shown, in the embodiment, the mounting through hole 101 is a polygonal hole, the polar post 200 comprises a main body part 210, a plug-in part 220 and a clamping part 230, the main body part 210 is arranged at the inner side of the top cover body 100, the projection of the main body part 210 on the top cover body 100 at least partially overlaps with the top cover body 100; the plug-in part 220 is connected with the main body part 210 and inserted into the mounting through hole 101, the clamping part 230 is connected with the plug-in part 220 and arranged at the outer side of the top cover body 100; the shape of the clamping part 230 is the same as that of the mounting through hole 101, and the projection of the clamping part 230 on the top cover body 100 falls outside the mounting through hole 101.

[0049] The top cover assembly provided by the embodiment is connected by the main body 210, the plug-in part 220 and the clamping part 230, wherein the projection of the main body 210 on the top cover body 100 at least partially covers the mounting through hole 101, that is, the main body 210 can form a clamping structure with the top cover body 100 to limit the pole column 200 in the axial direction, avoiding the pole column 200 from being pulled out of the mounting through hole 101 under the action of a large external force; the shapes of the mounting through hole 101 and the clamping part 230 are both set as polygons, and the projection of the clamping part 230 on the top cover body 100 falls outside the mounting through hole 101, so that the clamping part 230 forms a clamping structure with the top cover body 100 to further limit the pole column 200 in the axial direction, avoiding the pole column 200 from being pressed into the mounting through hole 101 under the action of a large pushing force; through the above setting, the push-pull pressure capacity of the pole column 200 can be improved, avoiding deformation or fracture of the pole column 200 when subjected to an external force, thereby ensuring the mechanical stability and use safety of the battery.

[0050] In the embodiment, the mounting through hole 101 is an n-sided polygonal hole, wherein 3≤n≤8. That is, the mounting through hole 101 can be a triangular hole, a quadrilateral hole, a pentagonal hole, a hexagonal hole, a heptagonal hole, an octagonal hole, etc. In addition, the mounting through hole 101 can be a regular n-sided polygonal hole or an irregular n-sided polygonal hole, which is not limited in the embodiment, as long as the cross-sectional shape of the clamping part 230 is the same as the shape of the mounting through hole 101.

[0051] During processing, the corner positions of the mounting through hole 101 are chamfered or right-angled, which, on the one hand, can reduce the range of the through hole on the top cover body 100, thereby increasing the contact area between the pole column 200 and the top cover body 100 and further enhancing the push-pull pressure capacity of the top cover assembly; on the other hand, it can avoid stress concentration at the corner positions of the mounting through hole 101, thereby preventing material fatigue and cracking. Similarly, the corner positions of the clamping part 230 are chamfered or right-angled to reduce the stress concentration after plastic injection molding of the top cover assembly, preventing damage to the overall structure of the top cover assembly.

[0052] As shown in FIGS. Figure 4 and Figure 5 The pole column 200 is an integral structure, which facilitates the processing of the pole column 200, can omit the assembly link between multiple parts, and improves the assembly efficiency. Alternatively, the pole column 200 can be integrally processed by turning, milling and the like, which has high processing efficiency and high processing precision.

[0053] To facilitate the assembly between the pole 200 and the top cover body 100, the side length of the clamping portion 230 is less than or equal to the side length of the mounting through hole 101, so as to facilitate the pole 200 to extend into the mounting through hole 101 from the inner side of the top cover body 100 and extend to the outer side of the top cover body 100. Alternatively, the side length of the clamping portion 230 is 0.2mm-2mm less than the side length of the mounting through hole 101. For example, the side length of the clamping portion 230 is 0.3mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.3mm, 1.5mm, 1.6mm, 1.8mm, etc. less than the side length of the mounting through hole 101. The embodiment does not limit the specific values of the side length of the clamping portion 230 and the side length of the mounting through hole 101, as long as the side length of the clamping portion 230 is less than the side length of the mounting through hole 101 to facilitate the assembly of the two. In addition, it can be understood that during processing, the side length of the clamping portion 230 can be appropriately increased to facilitate the assembly of the clamping portion 230 and the top cover body 100, so as to increase the contact area between the pole 200 and the top cover body 100 and further enhance the push-pull pressure capacity of the top cover assembly.

[0054] As shown in Figure 2 and Figure 4 The outer side of the top cover body 100 is provided with an annular protrusion 102, and the annular protrusion 102 is arranged around the mounting through hole 101. The annular protrusion 102 can block the penetration of the electrolyte from the outer side of the top cover body 100 to the inside, so as to improve the sealing performance of the top cover assembly. Alternatively, the height of the annular protrusion 102 is 0.2mm-1.0mm. For example, the height of the annular protrusion 102 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, etc. The embodiment does not limit the specific value of the height of the annular protrusion 102, and the designer can adjust the height of the annular protrusion 102 according to the actual needs.

[0055] To further ensure the sealing performance of the top cover assembly, a sealing member 300 is arranged between the main body portion 210 and the inner wall of the top cover body 100. The sealing member 300 is a rubber sealing ring, which has good sealing effect and low cost.

[0056] In order to realize the installation of the sealing member 300, the inner wall of the top cover body 100 is provided with a receiving groove 103 for accommodating the sealing member 300, so that the sealing member 300 is better embedded, the installation stability of the sealing member 300 is improved, the sealing member 300 is prevented from falling off in the use process, and the sealing effect is enhanced. When the top cover body 100 is processed, the receiving groove 103 can be processed on the inner side of the top cover body 100 by using a stamping process, and the annular protrusion 102 can be formed on the outer side of the top cover body 100 at the same time. This arrangement can simplify the processing procedure, and the whole is stamped from the inside to the outside, which can also increase the internal space of the battery shell, and is beneficial to improve the battery capacity.

[0057] As shown in Figure 2 and Figure 5 In the present embodiment, the main body part 210 is a cylindrical structure, which cooperates with the sealing member 300 to realize the sealing of the installation through hole 101 and prevent the electrolyte in the battery shell from leaking. The plug-in part 220 is a cylindrical structure, so that the pole 200 can extend out of the top cover body 100 after extending into the installation through hole 101 from the inner side of the top cover body 100. When designing the plug-in part 220, the diameter thereof can be made as large as possible to increase the cross-sectional area of the pole 200, so as to provide a larger current channel, reduce the current density, reduce the temperature rise when overcurrent flows, and improve the safety and performance of the battery.

[0058] The assembly process of the top cover assembly will be briefly described below: Figures 1-5

[0059] 1) The sealing member 300 is sleeved on the plug-in part 220, the clamping part 230 of the pole 200 is aligned with the installation through hole 101, and the pole 200 extends out of the top cover body 100 after extending into the installation through hole 101 from the inner side of the top cover body 100. At this time, the clamping part 230 exceeds the top cover body 100;

[0060] 2) The pole 200 is rotated, so that the projection part of the clamping part 230 on the top cover body 100 falls outside the installation through hole 101. At this time, the main body part 210 abuts the sealing member 300 against the inner side of the top cover body 100, and the clamping part 230 abuts against the outer side of the top cover body 100, so that the pole 200 and the top cover body 100 are clamped and connected;

[0061] 3) The connected pole 200 and top cover body 100 are injection molded, that is, the first gap 500 between the clamping part 230 and the top cover body 100 and the second gap 600 between the main body part 210 and the receiving groove 103 are filled with injection plastic. After the injection plastic solidifies, upper and lower plastics are formed. When injection molding, pressure needs to be applied at the same time to compress the sealing member 300 by about 40%, so that the sealing member 300 is tightly abutted on the top cover body 100, and the sealing effect between the pole 200 and the top cover body 100 is ensured.

[0062] ​It should be explained that the angle of the pole 200 relative to the top cover body 100 after the pole 200 extends out of the top cover body 100 is not limited, and the operator can adjust the angle according to the actual assembly situation and the number of edges of the clamping portion 230, as long as the projection of the clamping portion 230 on the top cover body 100 falls outside the mounting hole 101, so that the clamping portion 230 can be clamped with the top cover body 100.

[0063] In the embodiment, the upper plastic and the lower plastic are both made of modified polyphenylene sulfide (PPS) material. The modified PPS material refers to the material in which the functionality of PPS is improved by adding glass fiber and conductive fiber in PPS particles, so as to improve the mechanical properties and heat resistance of the material, and further ensure the use performance of the entire top cover assembly.

[0064] Embodiment Two

[0065] The embodiment provides a top cover assembly, and the specific structure of the top cover assembly is substantially the same as that of the top cover assembly provided in Embodiment One, and the difference lies in that the structure of the pole 200 is different.

[0066] Figure 6 An exploded structural schematic diagram of the pole 200 provided in the embodiment is shown. Figure 7 An assembled structural schematic diagram of the pole 200 provided in the embodiment is shown. As shown in the figure, Figures 6-7 In the embodiment, the main body portion 210 and the plug-in portion 220 are integrally formed, and the clamping portion 230 is detachably connected to the plug-in portion 220. Compared with Embodiment One, the design is more convenient for assembling the pole 200, the integrally formed main body portion 210 and plug-in portion 220 are first inserted from the inner side of the top cover body 100 to the outside of the mounting hole 101, and then the clamping portion 230 is connected to the part of the plug-in portion 220 extending out of the mounting hole 101. In addition, in the embodiment, the length of the side of the clamping portion 230 does not need to be less than the length of the side of the mounting hole 101, when the length of the side of the clamping portion 230 is greater than the length of the side of the mounting hole 101, the pole 200 and the top cover body 100 can also be successfully assembled, and if the length of the side of the clamping portion 230 is greater than the length of the side of the mounting hole 101, the contact area between the pole 200 and the top cover body 100 can be further increased, and the push-pull pressure capacity of the top cover assembly is further enhanced.

[0067] Optionally, in the embodiment, the clamping portion 230 is threadedly connected to the plug-in portion 220. Specifically, the clamping portion 230 is provided with an internal thread, and the plug-in portion 220 is provided with an external thread segment, and the clamping portion 230 can be directly screwed on the plug-in portion 220, and the connection is stable and convenient for disassembly. Of course, in other embodiments, the clamping portion 230 can also be connected to the plug-in portion 220 through a riveting process, and the same effect can also be achieved.

[0068] Continuing as Figure 6 、 Figure 7 and shown in Figure 2 , the top cover body 100 is provided with a limiting piece 400 for limiting the rotation of the clamping part 230 relative to the plug-in part 220. Through the arrangement of the limiting piece 400, the rotation of the pole column 200 during the assembly and use of the battery can be prevented, thereby ensuring the stability of the internal connection of the battery and the safety of the use of the battery.

[0069] It should be explained that in the present embodiment, the clamping part 230 is threadedly connected to the plug-in part 220, and referring to the arrangement of Figure 2 , the limiting piece 400 can only limit the counterclockwise rotation of the clamping part 230, but cannot limit the clockwise rotation of the clamping part 230. In order to achieve the good anti-rotation effect of the limiting piece 400 on the pole column 200, the clockwise rotation direction of the clamping part 230 can be set as the screw tightening direction, and the limiting piece 400 is used to limit the rotation of the clamping part 230 in the screw loosening direction, so as to improve the anti-rotation function of the pole column 200, thereby ensuring the stability of the battery under vibration or impact conditions.

[0070] Optionally, the number of limiting pieces 400 is at least two, and the at least two limiting pieces 400 are arranged in a circumferential direction of the mounting through hole 101, so as to further improve the anti-rotation function of the pole column 200.

[0071] Optionally, the pole column 200 should be in insulated contact with the limiting piece 400, so as to avoid the electrical connection of the pole column 200 with the top cover body 100 through the limiting piece 400. Specifically, the limiting piece 400 can be made of insulating material, or an insulating piece is arranged between the clamping part 230 and the limiting piece 400, so as to realize the insulation between the pole column 200 and the limiting piece 400.

[0072] Embodiment three

[0073] The present embodiment provides a top cover assembly, and the specific structure of the top cover assembly is substantially the same as that of the top cover assembly provided in embodiment one, and the difference lies in that the structure of the pole column 200 is different.

[0074] Figure 8 An exploded structural schematic view of the pole column 200 provided in the present embodiment is shown. Figure 9 An assembled structural schematic view of the pole column 200 provided in the present embodiment is shown. As Figures 8-9As shown, in the embodiment, the main body 210 is detachably connected to the insertion part 220, and the clamping part 230 is detachably connected to the insertion part 220. When the pole 200 in the example is assembled with the cover body 100, the main body 210 can be connected to the insertion part 220 first, and then the connected main body 210 and insertion part 220 are installed through the mounting hole 101 from the inside of the cover body 100, and then the clamping part 230 is connected to the part of the insertion part 220 extending out of the mounting hole 101. In addition, in the embodiment, the side length of the clamping part 230 does not need to be smaller than the side length of the mounting hole 101. When the side length of the clamping part 230 is greater than the side length of the mounting hole 101, the pole 200 and the cover body 100 can also be assembled smoothly, and if the side length of the clamping part 230 is greater than the side length of the mounting hole 101, the contact area between the pole 200 and the cover body 100 can be further increased, thereby enhancing the push-pull pressure capacity of the cover assembly.

[0075] Alternatively, in the embodiment, the clamping part 230 is threadedly connected to the insertion part 220, and the main body 210 is threadedly connected to the insertion part 220. Specifically, the clamping part 230 is provided with internal threads, the main body 210 is provided with internal threads, and the outer wall of the insertion part 220 is provided with external threads. The clamping part 230 is directly screwed on the insertion part 220 from the outside of the cover body 100, and the main body 210 is directly screwed on the insertion part 220 from the inside of the cover body 100, which is stable and convenient to disassemble. Of course, in other embodiments, the main body 210 and the clamping part 230 can also be connected to the insertion part 220 by riveting process, which can also achieve the above-mentioned effect.

[0076] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A roof assembly characterized by, The application relates to a top cover assembly for a battery, which comprises a top cover body (100) provided with a mounting through hole (101) in a polygonal shape; and a pole column (200) which comprises a main body part (210), a plug-in part (220) and a clamping part (230), wherein the main body part (210) is arranged on the inner side of the top cover body (100), the projection of the main body part (210) on the top cover body (100) at least partially overlaps the top cover body (100), the plug-in part (220) is connected with the main body part (210) and is inserted into the mounting through hole (101), the clamping part (230) is connected with the plug-in part (220) and is arranged on the outer side of the top cover body (100), the shape of the clamping part (230) is the same as that of the mounting through hole (101), and the projection of the clamping part (230) on the top cover body (100) falls outside the mounting through hole (101). The pole column (200) is an integral forming structure, and the side length of the clamping part (230) is less than or equal to the side length of the mounting through hole (101). The main body part (210) is detachably connected with the plug-in part (220), and / or the clamping part (230) is detachably connected with the plug-in part (220).

2. The header assembly of claim 1, wherein, At least one limiting part (400) for limiting the rotation of the clamping part (230) relative to the plug-in part (220) is arranged on the top cover body (100).

3. The header assembly of claim 1, wherein, A rounded corner or a right-angled corner is arranged at the corner position of the clamping part (230), and / or a rounded corner or a right-angled corner is arranged at the corner position of the mounting through hole (101).

4. The header assembly of claim 1, wherein, An annular protrusion (102) is arranged on the outer side of the top cover body (100) and surrounds the mounting through hole (101).

5. The header assembly of claim 1, wherein, The height of the annular protrusion (102) is 0.2mm-1.0mm.

6. The header assembly of any one of claims 1-5, wherein, A sealing part (300) is arranged between the main body part (210) and the inner wall of the top cover body (100).

7. The header assembly of claim 6, wherein, The inner wall of the top cover body (100) is provided with a containing groove (103) for containing the sealing part (300).

8. The header assembly of any one of claims 1-5, wherein, The application further relates to a battery which comprises a shell, an electric core and the top cover assembly, the shell is provided with an opening on one side, the electric core is arranged in the shell, the top cover assembly seals the opening, and the pole lug of the electric core is electrically connected with the pole column (200) of the top cover assembly.

9. The header assembly of claim 8, wherein, ​ 10. A battery, characterized by ​

Images