End cover assembly, battery device and electric equipment

Abstract

The utility model discloses an end cover assembly, a battery device and electric equipment, the end cover assembly comprises a cover plate, a bonding piece and an insulating piece, the cover plate is provided with a first mounting hole, the bonding piece is bonded on the cover plate, the bonding piece is provided with a second mounting hole, the second mounting hole corresponds to the first mounting hole, the insulating piece is arranged on one side, back to the bonding piece, of the cover plate, and the insulating piece is connected with the bonding piece. The bonding part is provided with a first mounting hole, the insulating part is provided with a third mounting hole, the third mounting hole corresponds to the first mounting hole, the thickness of the bonding part is H1, the thickness of the insulating part is H2, and H1 is smaller than H2. Through the arrangement, the connection reliability of the end cover assembly is improved, and the falling risk in the manufacturing and using process is reduced.

Description

Technical Field

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

[0002] The current cover plate structure is mainly manufactured by injecting the injection molded parts onto the cover plate, and then installing the pole and the connecting piece. The connection reliability of the current cover plate structure is poor, and there is a risk of falling off during the manufacturing and use process. Utility Model Content

[0003] The purpose of the present application is to provide an end cover assembly, a battery device and an electrical device to solve the problem of poor connection reliability of the cover structure and the risk of falling off during manufacturing and use.

[0004] To achieve the purpose of this application, this application provides the following technical solutions:

[0005] In a first aspect, the present application provides an end cover assembly, comprising: a cover plate, having a first mounting hole; an adhesive member bonded to the cover plate, the adhesive member having a second mounting hole, the second mounting hole corresponding to the first mounting hole; an insulating member, arranged on a side of the cover plate facing away from the adhesive member, the insulating member having a third mounting hole, the third mounting hole corresponding to the first mounting hole; wherein the thickness of the adhesive member is H1, and the thickness of the insulating member is H2, satisfying: H1<H2.

[0006] In one implementation, H2≤3H1 is also satisfied.

[0007] In one embodiment, the cover plate includes a first surface and a second surface opposite to each other, the first mounting hole passes through the first surface and the second surface, the adhesive member is arranged on the first surface, the insulating member includes a plate body and a cylinder body, one end of the cylinder body is connected to the plate body, the third mounting hole passes through the cylinder body and the plate body, the plate body is arranged on the second surface, and the cylinder body extends into the first mounting hole.

[0008] In one embodiment, the end cover assembly also includes a pole, which includes a disk and a column, one end of the column is connected to the disk, the column is passed through the first mounting hole, the second mounting hole and the third mounting hole, and the disk is bonded to the surface of the adhesive facing away from the cover plate.

[0009] In one embodiment, at the same position in the radial direction of the first mounting hole, the outer peripheral edge of the adhesive is flush with the outer peripheral edge of the disk body, or the adhesive protrudes outward from the outer peripheral edge of the disk body.

[0010] In one embodiment, in the radial direction of the first mounting hole, the minimum size of the disc body>the maximum size of the first mounting hole≥the maximum size of the cylinder body>the maximum size of the third mounting hole≥the maximum size of the column body.

[0011] In one implementation, in a radial direction of the first mounting hole, a maximum dimension of the first mounting hole>a maximum dimension of the second mounting hole>a maximum dimension of the column.

[0012] In one embodiment, the end cover assembly also includes a connecting plate, which is arranged on the side of the insulating member facing away from the cover plate, and the end of the column away from the disk body is connected to the connecting plate; at the same position in the radial direction of the first mounting hole, the outer peripheral edge of the plate body protrudes from the outer peripheral edge of the connecting plate.

[0013] In one embodiment, the insulating member further includes a limiting structure, the limiting structure is disposed on a surface of the plate body facing away from the cylinder body, and the connecting piece is disposed in a space enclosed by the limiting structure.

[0014] In one embodiment, the insulating member further includes an anti-rotation column, which is disposed on the plate body and spaced apart from the cylinder body, and the cylinder body and the anti-rotation column are located on the same side of the plate body, and a limiting groove is provided on the second surface, and the anti-rotation column extends into the limiting groove.

[0015] In one embodiment, the adhesive is any one of a polypropylene adhesive, a polyethersulfone adhesive, and a polyamide adhesive, and the insulating member is any one of a polypropylene insulating member, a polycarbonate insulating member, a polyethylene insulating member, and a polystyrene insulating member.

[0016] In a second aspect, the present application provides a battery device, comprising a shell, a battery cell and an end cap assembly as described in any one of the various embodiments of the first aspect, wherein the shell has a receiving cavity, the battery cell is received in the receiving cavity, the end cap assembly is connected to the shell and closes the receiving cavity, and the battery cell is electrically connected to a connecting piece of the end cap assembly.

[0017] In a third aspect, the present application further provides an electrical device, comprising an electrical device and the battery device described in the second aspect, wherein the battery device supplies power to the electrical device.

[0018] By setting an adhesive and an insulating member, the adhesive is bonded and fixed to the cover plate and used to be bonded and fixed to the pole, so that the pole and the cover plate are connected and fixed and sealed, satisfying H1<H2, so that the adhesive can be made thinner than the insulating member, which is beneficial to reducing the thickness of the end cover assembly. Compared with the conventional cover plate structure, the connection reliability of the end cover assembly is improved, and the risk of falling off during manufacturing and use is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a perspective view of an end cap assembly of an embodiment;

[0021] Figure 2 is an exploded view of an end cap assembly of one embodiment;

[0022] Figure 3 is a cross-sectional view of an end cap assembly of one embodiment;

[0023] Figure 4 is a bottom view of an end cap assembly according to an embodiment.

[0024] Description of reference numerals:

[0025] 10-cover plate, 11-first mounting hole, 12-first surface, 13-second surface, 14-limiting groove, 15-liquid injection hole;

[0026] 20-adhesive member, 21-second mounting hole;

[0027] 30-insulating member, 31-third mounting hole, 32-plate body, 33-cylinder body, 34-limiting structure, 341-first limiting block, 342-second limiting block, 343-third limiting block, 35-anti-rotation column;

[0028] 40-connecting piece, 41-fourth mounting hole;

[0029] 50-pole, 51-disk, 52-column. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0033] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] Please refer to Figures 1 to 3 An embodiment of the present application provides an end cover assembly, including a cover plate 10, an adhesive member 20, an insulating member 30, a connecting sheet 40 and a pole 50.

[0035] The cover plate 10 can be made of a material with high structural strength such as an iron alloy, an aluminum alloy, or a magnesium alloy, and is used as a mounting base for the adhesive 20, the insulating member 30, the connecting piece 40, and the pole 50, and is used to connect and fix with the housing of the battery device. The cover plate 10 is provided with a first mounting hole 11. Optionally, the cover plate 10 is plate-shaped and includes a first surface 12 and a second surface 13 opposite to each other, and the first mounting hole 11 passes through the first surface 12 and the second surface 13, wherein the first surface 12 and the second surface 13 can be both planes, both curved surfaces, one plane and the other curved surface, etc., without limitation. The overall shape of the cover plate 10 (i.e., the shape of the first surface 12 or the second surface 13) can be roughly rectangular, square, prismatic, elliptical, circular, etc., without limitation. Optionally, the overall shape of the cover plate 10 is rectangular and the adjacent sides are smoothly transitioned for installation to a square shell battery. Optionally, the overall shape of the cover plate 10 is circular for installation to a cylindrical battery. In addition to the first mounting hole 11, the cover plate 10 may also be provided with any other feasible structure, such as Figure 1 and Figure 2 It is shown in the figure that the cover plate 10 is also provided with a liquid injection hole 15, and the liquid injection hole 15 is used to inject electrolyte into the battery device. For other structures, the embodiments of the present application are not limited.

[0036] The thickness of the cover plate 10 (i.e., the distance between the first surface 12 and the second surface 13) is ≥ 0.05 mm to ensure sufficient strength requirements. According to the different shapes of the cover plate 10, the length, width, major axis, minor axis or diameter of the cover plate 10 must be ≥ 2 mm to meet the connection requirements with the shell of the battery device and the size requirements for opening the first mounting hole 11. The shape of the first mounting hole 11 (i.e., the cross-sectional shape) can be circular, square, oval, etc., without limitation. The length, width, major axis, minor axis or diameter of the first mounting hole 11 must be ≥ 0.05 mm to meet the requirements of installing other components.

[0037] The material of the adhesive 20 can be hot melt adhesive or thermoplastic adhesive. Specifically, the material of the adhesive 20 is any one of PP (polypropylene), PES (polyethersulfone), PA (polyamide), etc., that is, the adhesive 20 is any one of polypropylene adhesive, polyethersulfone adhesive, and polyamide adhesive, and can be bonded and fixed to the cover plate 10 by heating. The adhesive 20 is bonded to the cover plate 10, and the adhesive 20 is provided with a second mounting hole 21, and the second mounting hole 21 corresponds to the first mounting hole 11. Optionally, the adhesive 20 is a diaphragm-like structure, which is arranged on the first surface 12 of the cover plate 10, and the adhesive 20 is bonded and fixed to the cover plate 10.

[0038] Optionally, the thickness of the adhesive member 20 is H1, H1 ≥ 0.05 mm, to meet insulation and sealing requirements. The second mounting hole 21 is a through hole that penetrates along the thickness direction of the adhesive member 20. The shape of the second mounting hole 21 can be the same as or different from that of the first mounting hole 11, without limitation.

[0039] The insulating member 30 is disposed on the side of the cover plate 10 facing away from the adhesive member 20, and the insulating member 30 is provided with a third mounting hole 31, and the third mounting hole 31 corresponds to the first mounting hole 11. The insulating member 30 is made of insulating material and is used to separate the connecting piece 40 and the cover plate 10 to prevent insulation between the two. The insulating member 30 is also used to separate the pole 50 and the cover plate 10 to prevent insulation between the two.

[0040] Optionally, the material of the insulating member 30 can be any one of PP (polypropylene), PC (polycarbonate), PE (polyethylene), PS (polystyrene), etc., that is, the insulating member 30 is any one of a polypropylene insulating member, a polycarbonate insulating member, a polyethylene insulating member, and a polystyrene insulating member. The insulating member 30 can be formed by injection molding, and the manufacturing method of injection molding is simple. The insulating member 30 can also be made of other materials and formed by other processes without limitation. The specific shape and structure of the insulating member 30 are not limited, and it can be partially or completely disposed on the second surface 13 of the cover plate 10, so as to be opposite to the adhesive member 20 disposed on the first surface 12.

[0041] Optionally, the thickness of the insulating member 30 (ie, the maximum dimension on the second surface 13 perpendicular to the cover plate 10 ) is H2, where H2 ≥ 0.2 mm, to meet structural strength and insulation requirements.

[0042] Optionally, the adhesive 20 and the insulating member 30 also satisfy: H1<H2. The insulating member 30 is obtained by injection molding, and its minimum thickness during injection molding cannot be too small to prevent breakage during demolding. However, the adhesive 20 does not need to consider the problem of breakage. Therefore, setting H1<H2 can reduce the thickness of the end cover assembly compared to the conventional method of using injection molding on both sides of the cover plate 10.

[0043] Furthermore, the adhesive 20 and the insulating member 30 also satisfy: H2≤3H1. Considering that the adhesive 20 cannot be too thin, so as to avoid the pole 50 penetrating the adhesive 20 and contacting the cover 10, causing the cover 10 to be abnormally charged. The insulating member 30 cannot be too thick, so as to avoid the thickness of the end cover assembly being too large. Setting H1<H2≤3H1 can better meet the requirements of insulation isolation function, structural strength and thickness.

[0044] The third mounting hole 31 is a through hole that penetrates along the thickness direction of the insulating member 30 (i.e., the direction perpendicular to the second surface 13 of the cover plate 10). The shape of the third mounting hole 31 may be the same as or different from that of the first mounting hole 11, and is not limited thereto. The size of the third mounting hole 31 is smaller than that of the first mounting hole 11. For example, the first mounting hole 11 and the third mounting hole 31 are both round holes. The aperture of the third mounting hole 31 is smaller than the aperture of the first mounting hole 11, and the third mounting hole 31 is entirely located within the space of the first mounting hole 11. After the pole 50 is inserted into the third mounting hole 31, the inner wall of the third mounting hole 31 can limit the position of the pole 50, so that there is a gap between the pole 50 and the inner wall of the first mounting hole 11, so as to avoid the contact between the pole 50 and the cover plate 10 and cause electrical abnormality of the cover plate 10.

[0045] The connecting piece 40 is arranged on the side of the insulating member 30 facing away from the cover plate 10. The connecting piece 40 is generally a thin sheet structure, which is made of a conductive material, specifically aluminum, copper, etc., without limitation. The connecting piece 40 is used to be welded to the tab on the battery cell of the battery device and connected to the pole 50 to achieve electrical connection between the battery cell and the pole 50. Optionally, the thickness of the connecting piece 40 is ≥ 0.1 mm to meet the electrical connection requirements.

[0046] The pole 50 includes a disk 51 and a column 52, and one end of the column 52 is connected to the disk 51. The disk 51 is roughly plate-shaped, and the column 52 is roughly columnar. One end face of the column 52 is connected to the middle of the disk surface of the disk 51. Optionally, the pole 50 is an integrated structure, that is, the disk 51 and the column 52 are an integrated structure, and can be manufactured by an integrated molding process. The disk 51 is larger than the column 52, that is, the orthographic projection of the column 52 on the disk surface of the disk 51 is all located on the disk 51, and at least part of the disk 51 exceeds the orthographic projection area of ​​the column 52. The pole 50 is made of a conductive material, which can be aluminum, copper, etc., without limitation.

[0047] The column 52 is inserted into the first mounting hole 11, the second mounting hole 21 and the third mounting hole 31, the disk 51 is bonded to the surface of the adhesive 20 facing away from the cover plate 10, and the end of the column 52 away from the disk 51 is connected to the connecting piece 40. The disk 51 is bonded and fixed to the adhesive 20, so that the cover plate 10, the adhesive 20 and the pole 50 are fixed together to maintain structural stability. Specifically, the disk 51 and the adhesive 20 can be bonded and fixed by hot pressing. Optionally, the end face of the column 52 away from the disk 51 is connected and fixed to the surface of the connecting piece 40 facing the cover plate 10 in the thickness direction by welding, bonding, etc. Optionally, the connecting piece 40 is provided with a fourth mounting hole 41, the column 52 is inserted into the fourth mounting hole 41, and the outer peripheral surface of the column 52 is connected and fixed to the inner wall of the fourth mounting hole 41 by welding, bonding, etc.

[0048] An installation method of the end cover assembly of the embodiment of the present application is: installing the adhesive 20, and installing the adhesive 20 on the cover plate 10 through a hot pressing process; installing the pole 50, and passing the column 52 of the pole 50 through the second mounting hole 21 and the first mounting hole 11 in sequence, and making the disk body 51 contact with the adhesive 20, and then using a hot pressing process to bond and fix the disk body 51 to the adhesive 20; assembling the insulating member 30, setting the insulating member 30 on the side of the cover plate 10 facing away from the adhesive 20, and making the column 52 pass through the third mounting hole 31 of the insulating member 30; setting the connecting piece 40 on the side of the insulating member 30 facing away from the cover plate 10, and welding the connecting piece 40 to the column 52.

[0049] The conventional method for installing the cover plate structure at present is: injection molding an injection molded part on the cover plate 10, and then installing the pole 50 and the connecting piece 40. There is no connection relationship between the pole 50, the connecting piece 40 and the injection molded part, and the connection reliability is poor. The pole 50 and the connecting piece 40 are easily separated from the injection molded part and the cover plate 10.

[0050] In addition, the thickness of the injection molded part cannot be made thinner, resulting in a thicker overall thickness of the end cover assembly. When the length of the pole 50 is limited, the pole 50 and the connecting piece 40 are easily unable to connect. Even if they are connected, it is easy to cause insufficient strength, resulting in the risk of separation of the connecting piece 40 and the pole 50.

[0051] At present, conventional cover plate structure injection molding parts need to use PFA (tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer) material to meet the requirements of sealing, insulation and electrolyte corrosion resistance. This material has adverse effects on the ecological environment and human health, and some organizations have planned to ban this material. At present, there is no material that can replace this injection molding part, so the structure and manufacturing process of the cover plate structure need to be redesigned.

[0052] In the embodiment of the present application, an adhesive 20 and an insulating member 30 are provided, and the adhesive 20 is bonded and fixed to the cover plate 10 and is used to bond and fix to the pole 50, so that the pole 50 and the cover plate 10 are connected and fixed and sealed, and H1<H2 is satisfied, so that the adhesive 20 can be made thinner than the insulating member 30, which is beneficial to reducing the thickness of the end cover assembly. Compared with the conventional cover plate structure, the connection reliability of the end cover assembly is improved, and the risk of falling off during the manufacturing and use process is reduced.

[0053] The thickness of the adhesive 20 can be made thinner. Compared with the conventional design in which the pole 50 is insulated from the first surface 12 of the cover plate 10 by an injection molded part, the overall thickness of the end cover assembly can be reduced, ensuring a reliable connection between the pole 50 with limited length and the connecting piece 40, and reducing the risk of separation between the connecting piece 40 and the pole 50.

[0054] The embodiment of the present application adopts an adhesive 20 plus an insulating part 30 to replace the existing PFA injection molded parts. The adhesive 20 can ensure the sealing and insulation requirements, and the insulating part 30 can meet the electrolyte corrosion resistance requirements, thereby achieving a perfect replacement for the PFA injection molded parts.

[0055] In one embodiment, reference Figure 2 and Figure 3 The cover plate 10 includes a first surface 12 and a second surface 13 opposite to each other, the adhesive member 20 is arranged on the first surface 12, the insulating member 30 includes a plate body 32 and a cylinder body 33, one end of the cylinder body 33 is connected to the plate body 32, the third mounting hole 31 passes through the cylinder body 33 and the plate body 32, the plate body 32 is arranged on the second surface 13, and the cylinder body 33 extends into the first mounting hole 11.

[0056] The plate body 32 is roughly plate-shaped, and the shape of the plate body 32 is roughly adapted to the cover plate 10. The plate body 32 also includes two opposite faces, one of which is in close contact with the second surface 13. The barrel 33 is arranged on the surface of the plate body 32 that is in close contact with the second surface 13. The shape of the outer peripheral surface of the barrel 33 is roughly adapted to the first mounting hole 11. The outer peripheral surface of the barrel 33 can be in close contact with the inner peripheral wall of the first mounting hole 11, or there can be a small gap. The shape of the inner peripheral surface of the barrel 33 (i.e., the side wall of the third mounting hole 31) is roughly adapted to the column 52, so that the column 52 is in close contact with the side wall of the third mounting hole 31 after being passed through the third mounting hole 31, or there can be a small gap. Optionally, the plate body 32 and the barrel 33 are an integrated structure. For example, the insulating member 30 is formed by injection molding, so that the plate body 32 and the barrel 33 are integrated. Optionally, the plate body 32 and the cylinder body 33 may also be a split structure and connected to form an integral body by any feasible method, without specific limitation. The third mounting hole 31 passes through the cylinder body 33 and the plate body 32, so that the column 52 of the pole 50 penetrating the third mounting hole 31 can extend from the first surface 12 side and extend from the second surface 13 side. The cylinder body 33 plays the role of isolating the column body 52 and the side wall of the first mounting hole 11, preventing the column body 52 from being electrically conductive with the cover plate 10. The connecting piece 40 is arranged on the side of the plate body 32 facing away from the cover plate 10, and the plate body 32 plays the role of isolating the connecting piece 40 and the cover plate 10, preventing the connecting piece 40 from being electrically conductive with the cover plate 10, and meeting the insulation requirements. Optionally, the height of the cylinder body 33 protruding from the plate body 32 is ≤ the thickness of the cover plate 10, so that the cylinder body 33 will not interfere with the adhesive 20 and the disk body 51 of the pole 50. Among them, the thickness of the plate body 32 is H2.

[0057] Optional, reference Figures 1 to 3 At the same position in the radial direction of the first mounting hole 11, the outer peripheral edge of the adhesive 20 is flush with the outer peripheral edge of the disk body 51, or the adhesive 20 protrudes from the outer peripheral edge of the disk body 51. The radial direction of the first mounting hole 11 refers to the radial direction of the circular hole when the first mounting hole 11 is fitted into a circular hole.

[0058] In other words, the total area enclosed by the outer edge of the orthographic projection of the adhesive 20 on the first surface 12 is larger than the orthographic projection area of ​​the disk body 51 on the first surface 12, and the orthographic projection of the disk body 51 on the first surface 12 is entirely located within the space enclosed by the outer edge of the orthographic projection of the adhesive 20 on the first surface 12.

[0059] The adhesive member 20 is relatively thin, and its outer peripheral edge connects the surface of the adhesive member 20 bonded to the cover plate 10 and the surface facing away from the cover plate 10. The adhesive member 20 is also provided with a second mounting hole 21, so that the adhesive member 20 also has an inner peripheral edge, and the inner peripheral edge connects the surface of the adhesive member 20 bonded to the cover plate 10 and the surface facing away from the cover plate 10. Among the outer peripheral edges of the adhesive member 20, at least one edge is located outside the outer peripheral edge at the same position of the disk body 51 (i.e., the same position in the radial direction of the first mounting hole 11), and no edge is located inside the outer peripheral edge at the same position of the disk body 51. Specifically, taking the example that the orthographic projections of the adhesive 20 and the disk body 51 on the first surface 12 are both rectangles, the four edges in the orthographic projection of the adhesive 20 and the four edges of the orthographic projection of the disk body 51 may correspond one to one, and 1, 2, 3, or 4 of the four edges of the orthographic projection of the adhesive 20 may be located outside the corresponding 1, 2, 3, or 4 edges of the four edges of the orthographic projection of the disk body 51, and the remaining edges of the orthographic projection of the adhesive 20, except for the edges located outside the corresponding edges of the four edges of the orthographic projection of the disk body 51, may coincide with the corresponding edges of the orthographic projection of the disk body 51. In this arrangement, the disk body 51 and the first surface 12 are completely separated by the adhesive 20, thereby ensuring insulation performance. Moreover, since the adhesive 20 is bonded and fixed to both the cover plate 10 and the disk body 51, the gap between the adhesive 20 and the first surface 12 or the disk body 51 is zero, so that even if the electrolyte or gas leaks into the first mounting hole 11, it will not leak through the gap between the adhesive 20 and the first surface 12 or the disk body 51, thereby ensuring sealing performance.

[0060] Optional, reference Figures 1 to 3 In the radial direction of the first mounting hole 11 , the minimum size of the disk 51 > the maximum size of the first mounting hole 11 ≥ the maximum size of the cylinder 33 > the maximum size of the third mounting hole 31 ≥ the maximum size of the column 52 .

[0061] Specifically, in the radial direction of the first mounting hole 11 (refer to the above description of the radial direction, which will not be repeated here), the disc body 51 may have different sizes according to its shape. For example, when the disc body 51 is a rectangular flat plate structure, its minimum size may be the width. For example, when the disc body 51 is a disc structure, its minimum size is the diameter. The same definition applies to the first mounting hole 11, the second mounting hole 21, the third mounting hole 31, the cylinder 33 and the column 52. In short, the various sizes in this embodiment refer to the sizes in the radial direction of the first mounting hole 11.

[0062] The minimum size of the disk 51 is greater than the maximum size of the first mounting hole 11, so that the disk 51 will not fall into the first mounting hole 11, ensuring that at least a portion of the disk 51 is bonded to the first surface 12 of the cover plate 10 through the adhesive 20, thereby meeting the installation and fixing requirements. The maximum size of the first mounting hole 11 is greater than or equal to the maximum size of the cylinder 33, so that the cylinder 33 can extend into the first mounting hole 11, thereby achieving the function of separating the column 52 from the cover plate 10. The maximum size of the cylinder 33 is greater than the maximum size of the third mounting hole 31, so that the cylinder 33 has a certain thickness, thereby playing the role of separating the column 52 from the cover plate 10. The maximum size of the third mounting hole 31 is greater than or equal to the maximum size of the column 52, so that the column 52 can pass through the third mounting hole 31, thereby achieving connection with the connecting piece 40, thereby meeting the installation requirements.

[0063] Optional, reference Figure 2 and Figure 3 , the maximum size of the first mounting hole 11>the maximum size of the second mounting hole 21≥the maximum size of the column 52. The maximum size of the first mounting hole 11>the maximum size of the second mounting hole 21 is satisfied, so that at least part of the adhesive 20 will extend into the space of the first mounting hole 11, ensuring that the disk 51 and the cover plate 10 will not face each other directly, avoiding electrical conduction caused by too close distance and no separation of the adhesive 20. The maximum size of the second mounting hole 21 is satisfied ≥the maximum size of the column 52, so that the column 52 can pass through the second mounting hole 21, meeting the installation and fixing requirements.

[0064] Optional, reference Figures 2 to 4 At the same position in the radial direction of the first mounting hole 11 , the outer peripheral edge of the plate body 32 protrudes from the outer peripheral edge of the connecting piece 40 .

[0065] In other words, the total area enclosed by the outer edges of the orthographic projection of the plate body 32 on the second surface 13 is larger than the total area enclosed by the outer edges of the orthographic projection of the connecting piece 40 on the second surface 13, and the orthographic projection of the connecting piece 40 on the second surface 13 is entirely located within the space enclosed by the outer edges of the orthographic projection of the plate body 32 on the second surface 13.

[0066] Similar to the relationship between the aforementioned adhesive 20 and the outer peripheral edge of the disk body 51, the relationship between the aforementioned plate body 32 and the connecting piece 40 is set to ensure that the insulation performance between the connecting piece 40 and the cover plate 10 meets the requirements, and the details are not repeated here.

[0067] Optionally, the insulating member 30 further includes a limiting structure 34 , which is disposed on a surface of the plate body 32 facing away from the cylinder body 33 , and the connecting piece 40 is disposed in a space enclosed by the limiting structure 34 .

[0068] The specific structure of the limiting structure 34 is not limited, and it is used to position and limit the connecting piece 40 so that the connecting piece 40 will not translate or rotate, thereby ensuring the stability of the structure after installation and enhancing reliability. The limiting structure 34 can be an integrated structure or a split structure with the plate body 32, without limitation.

[0069] Exemplarily, the limiting structure 34 includes a first limiting block 341, a second limiting block 342 and a third limiting block 343. The first limiting block 341 is arranged at one end in the length direction of the plate body 32, the second limiting block 342 and the third limiting block 343 are arranged at the other end in the length direction of the plate body 32, and the second limiting block 342 and the third limiting block 343 are arranged at intervals in the width direction of the plate body 32. One end of the connecting piece 40 is directly opposite to the first limiting block 341 with a small gap, and the other end of the connecting piece 40 extends into the space between the second limiting block 342 and the third limiting block 343. The first limiting block 341 can limit the movement of the connecting piece 40 in its own length direction, and the second limiting block 342 and the third limiting block 343 can limit the rotation of the connecting piece 40 around the column 52, thereby ensuring that the position of the connecting piece 40 is limited and improving reliability.

[0070] Optional, reference Figure 2 and Figure 3 The insulating member 30 further includes an anti-rotation column 35 , which is disposed on the plate body 32 and spaced apart from the cylinder body 33 , and the cylinder body 33 and the anti-rotation column 35 are located on the same side of the plate body 32 , and a limiting groove 14 is provided on the second surface 13 , and the anti-rotation column 35 extends into the limiting groove 14 .

[0071] The anti-rotation column 35 can be a cylinder, a prism, a truncated cone, etc., without limitation. The limiting groove 14 is a blind hole, and the anti-rotation column 35 extends into the limiting groove 14, while the cylinder 33 extends into the first mounting hole 11, so that the insulating member 30 is limited. The cooperation between the anti-rotation column 35 and the limiting groove 14 prevents the insulating member 30 from rotating around the cylinder 33, and plays a role in positioning and limiting. The anti-rotation column 35 can be an integrated structure or a split structure with the plate body 32, without limitation.

[0072] refer to Figures 1 to 4 The embodiment of the present application also provides a battery device, including a shell (not shown), a battery cell (not shown) and the end cover assembly of any of the aforementioned embodiments, the shell has a receiving cavity, the battery cell is received in the receiving cavity, the end cover assembly is connected to the shell and closes the receiving cavity, and the battery cell is electrically connected to the connecting piece 40 of the end cover assembly.

[0073] The shell can be a square shell, a cylindrical shell, a prismatic shell, etc., without limitation. The battery cell can be a wound battery cell, a laminated battery cell, etc., without limitation. The battery cell has a pole ear, and the pole ear is welded to the connecting piece 40, so as to realize the electrical connection between the battery cell and the connecting piece 40. After the end cap assembly is assembled, the end cap assembly is aligned and welded with the shell, so that the edges of the cover plate 10 of the end cap assembly are welded and fixed to the shell, and the end cap assembly closes the receiving cavity.

[0074] The embodiment of the present application further provides an electric device, including an electric device and the battery device in the embodiment of the present application, wherein the battery device supplies power to the electric device.

[0075] The power-consuming device may specifically be an industrial power load, a commercial power load, a household power load, etc. The power-consuming device may specifically be an electric vehicle, an energy storage box, a base station, etc., without limitation.

[0076] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing 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 cannot be understood as a limitation on the present application.

[0077] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An end cap assembly, characterized in that: include: The cover plate is provided with a first mounting hole; An adhesive member, bonded to the cover plate, the adhesive member is provided with a second mounting hole, and the second mounting hole corresponds to the first mounting hole; An insulating member, arranged on a side of the cover plate facing away from the adhesive member, the insulating member is provided with a third mounting hole, and the third mounting hole corresponds to the first mounting hole; The thickness of the adhesive member is H1, and the thickness of the insulating member is H2, satisfying: H1<H2.

2. The end cap assembly according to claim 1, characterized in that: It also satisfies: H2≤3H1.

3. The end cap assembly according to claim 1, characterized in that: The cover plate includes a first surface and a second surface opposite to each other, the first mounting hole passes through the first surface and the second surface, the adhesive is arranged on the first surface, the insulating member includes a plate body and a cylinder, one end of the cylinder is connected to the plate body, the third mounting hole passes through the cylinder body and the plate body, the plate body is arranged on the second surface, and the cylinder extends into the first mounting hole.

4. The end cap assembly according to claim 3, characterized in that: The end cover assembly also includes a pole, which includes a disk and a column, one end of the column is connected to the disk, the column is penetrated by the first mounting hole, the second mounting hole and the third mounting hole, and the disk is bonded to the surface of the adhesive facing away from the cover plate.

5. The end cap assembly according to claim 4, characterized in that: At the same position in the radial direction of the first mounting hole, the outer peripheral edge of the adhesive component is flush with the outer peripheral edge of the disk body, or the adhesive component protrudes outward from the outer peripheral edge of the disk body.

6. The end cap assembly according to claim 4, characterized in that: In the radial direction of the first mounting hole, the minimum size of the disc body>the maximum size of the first mounting hole≥the maximum size of the cylinder body>the maximum size of the third mounting hole≥the maximum size of the column body.

7. The end cap assembly according to claim 4, characterized in that: In the radial direction of the first mounting hole, the maximum size of the first mounting hole>the maximum size of the second mounting hole≥the maximum size of the column.

8. The end cap assembly according to claim 4, characterized in that: The end cover assembly also includes a connecting piece, which is arranged on the side of the insulating member facing away from the cover plate, and the end of the column away from the disk body is connected to the connecting piece; at the same position in the radial direction of the first mounting hole, the outer peripheral edge of the plate body protrudes from the outer peripheral edge of the connecting piece.

9. The end cap assembly according to claim 8, characterized in that: The insulating member further comprises a limiting structure, wherein the limiting structure is arranged on a surface of the plate body facing away from the cylinder body, and the connecting piece is arranged in a space enclosed by the limiting structure.

10. The end cap assembly according to claim 3, characterized in that: The insulating member also includes an anti-rotation column, which is arranged on the plate body and spaced apart from the cylinder body, and the cylinder body and the anti-rotation column are located on the same side of the plate body, and a limiting groove is provided on the second surface, and the anti-rotation column extends into the limiting groove.

11. The end cap assembly according to any one of claims 1 to 10, characterized in that: The adhesive is any one of a polypropylene adhesive, a polyethersulfone adhesive, and a polyamide adhesive, and the insulating member is any one of a polypropylene insulating member, a polycarbonate insulating member, a polyethylene insulating member, and a polystyrene insulating member.

12. A battery device, characterized in that: It comprises a shell, a battery cell and an end cap assembly as claimed in any one of claims 1 to 11, wherein the shell has a receiving cavity, the battery cell is received in the receiving cavity, the end cap assembly is connected to the shell and closes the receiving cavity, and the battery cell is electrically connected to a connecting piece of the end cap assembly.

13. An electrical equipment, characterized in that: It comprises an electric device and the battery device as claimed in claim 12, wherein the battery device supplies power to the electric device.

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