End cover assembly, battery device, and electric device

Abstract

An end cover assembly, a battery device, and an electric device. The end cover assembly comprises a cover plate (10), an adhesive member (20) and an insulating member (30); the cover plate (10) is provided with a first mounting hole (11); the adhesive member (20) is bonded to the cover plate (10); the adhesive member (20) is provided with a second mounting hole (21); the second mounting hole (21) corresponds to the first mounting hole (11); the insulating member (30) is arranged on the side of the cover plate (10) facing away from the adhesive member (20); the insulating member (30) is provided with a third mounting hole (31); the third mounting hole (31) corresponds to the first mounting hole (11); the thickness of the adhesive member (20) is H1, the thickness of the insulating member (30) is H2, and the following condition is satisfied: H1<H2. By means of the configurations, the connection reliability of the end cover assembly is improved, and the risk of detachment during manufacturing and usage is reduced.

Description

End cap assembly, battery device and electrical equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 25, 2024, with application number 202420599416.9 and application name “End cover assembly, battery device and electrical equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of battery technology, and in particular to an end cap assembly, a battery device, and an electrical device. Background Art

[0003] The current cover plate structure is mainly manufactured by injection molding the cover plate, and then installing the pole and connecting piece. The connection reliability of the current cover plate structure is poor, and there is a risk of falling off during production and use. Summary of the Invention

[0004] The purpose of the present disclosure is to provide an end cover assembly, a battery device and an electrical device to solve the problems of poor connection reliability of the cover structure and the risk of falling off during production and use.

[0005] To achieve the purpose of this disclosure, the present disclosure provides the following technical solutions:

[0006] In a first aspect, the present disclosure provides an end cover assembly, comprising: a cover plate, which is provided with a first mounting hole; an adhesive member adhered to the cover plate, the adhesive member being provided with 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 being provided with 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.

[0007] In one embodiment, H2≤3H1 is also satisfied.

[0008] 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.

[0009] In one embodiment, the end cover assembly further 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.

[0010] In one embodiment, at the same radial position of the first mounting hole, the outer peripheral edge of the adhesive member is flush with the outer peripheral edge of the disk body, or the adhesive member protrudes from the outer peripheral edge of the disk body.

[0011] 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.

[0012] In one embodiment, in a 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.

[0013] In one embodiment, the end cover assembly further 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 radial position of the first mounting hole, the outer peripheral edge of the plate body protrudes from the outer peripheral edge of the connecting piece.

[0014] In one embodiment, the insulating member further includes a limiting structure, the limiting structure is provided on a surface of the plate body facing away from the cylinder body, and the connecting piece is provided in a space enclosed by the limiting structure.

[0015] In one embodiment, the insulating part 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 opened on the second surface, and the anti-rotation column extends into the limiting groove.

[0016] 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.

[0017] In a second aspect, the present disclosure provides a battery device comprising a shell, a battery cell, and an end cap assembly according to 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 the connecting piece of the end cap assembly.

[0018] In a third aspect, the present disclosure 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.

[0019] By providing an adhesive and an insulating member, the adhesive is bonded and fixed to the cover plate and is also used to bond and fix 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 production and use is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] FIG1 is a perspective view of an end cap assembly according to an embodiment;

[0022] FIG2 is an exploded view of an end cap assembly according to an embodiment;

[0023] FIG3 is a cross-sectional view of an end cap assembly according to an embodiment;

[0024] 4 is a bottom view of an end cap assembly according to one embodiment.

[0025] Description of reference numerals:

[0026] 10-cover plate, 11-first mounting hole, 12-first surface, 13-second surface, 14-limiting groove, 15-liquid injection hole;

[0027] 20-adhesive member, 21-second mounting hole;

[0028] 30-insulating member, 31-third mounting hole, 32-plate, 33-cylinder, 34-limiting structure, 341-first limiting block, 342-second limiting block, 343-third limiting block, 35-anti-rotation column;

[0029] 40-connecting piece, 41-fourth mounting hole;

[0030] 50-pole, 51-disk, 52-column. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0032] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0033] Unless otherwise defined, all technical and scientific terms used in this disclosure have the same meanings as commonly understood by those skilled in the art to which this disclosure belongs. The terms used in this disclosure and in the specification are for the purpose of describing specific embodiments only and are not intended to limit this disclosure. The term "and / or" as used in this disclosure includes any and all combinations of one or more of the relevant listed items.

[0034] The following describes some embodiments of the present disclosure in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0035] 1 to 3 , an embodiment of the present disclosure provides an end cap assembly, including a cover plate 10 , an adhesive member 20 , an insulating member 30 , a connecting piece 40 and a pole 50 .

[0036] The cover plate 10 can be made of a material with high structural strength such as iron alloy, aluminum alloy, magnesium alloy, etc., which serves as the installation 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 shell 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 flat, both curved, one flat and the other curved, 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 side surfaces have a smooth transition for installation on a square shell battery. Optionally, the overall shape of the cover plate 10 is circular for installation on a cylindrical battery. In addition to the first mounting hole 11, the cover plate 10 may also be provided with any other feasible structure. As shown in Figures 1 and 2, the cover plate 10 is also provided with an injection hole 15, which is used to inject electrolyte into the battery device. The embodiments of the present disclosure do not limit other structures.

[0037] The thickness of the cover plate 10 (i.e., the distance between the first surface 12 and the second surface 13) is ≥0.05mm to ensure sufficient strength requirements. Depending on the shape of the cover plate 10, the length, width, major axis, minor axis or diameter of the cover plate 10 must be ≥2mm 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, elliptical, etc., without limitation. The length, width, major axis, minor axis or diameter of the first mounting hole 11 must be ≥0.05mm to meet the requirements of installing other components.

[0038] The adhesive 20 can be made of hot melt adhesive or thermoplastic adhesive. Specifically, the adhesive 20 can be made of any of PP (polypropylene), PES (polyethersulfone), PA (polyamide), etc., that is, the adhesive 20 can be any 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 defines a second mounting hole 21, which corresponds to the first mounting hole 11. Optionally, the adhesive 20 is a membrane-like structure, which is disposed on the first surface 12 of the cover plate 10 and is bonded and fixed to the cover plate 10.

[0039] 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 extending through the thickness 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.

[0040] The insulating member 30 is disposed on the side of the cover plate 10 facing away from the adhesive member 20. The insulating member 30 defines a third mounting hole 31, which corresponds to the first mounting hole 11. The insulating member 30 is made of insulating material and serves to separate and insulate the connecting piece 40 from the cover plate 10. The insulating member 30 also serves to separate and insulate the terminal 50 from the cover plate 10.

[0041] Optionally, the insulating member 30 may be made of 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 may be formed by injection molding, which is a simple process. The insulating member 30 may 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 may be partially or completely disposed on the second surface 13 of the cover plate 10 so as to face away from the adhesive member 20 disposed on the first surface 12.

[0042] 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.

[0043] Optionally, the adhesive 20 and insulating member 30 also satisfy the following relationship: H1 < H2. The insulating member 30 is injection molded, and its minimum thickness must be kept to a minimum to prevent breakage during demolding. However, breakage is not a concern for the adhesive 20. Therefore, setting H1 < H2 reduces the thickness of the end cap assembly compared to conventional methods that use injection molded parts on both sides of the cover plate 10.

[0044] Furthermore, the adhesive 20 and the insulating member 30 also satisfy the following condition: H2 ≤ 3H1. Considering that the adhesive 20 cannot be too thin, to prevent the pole 50 from penetrating the adhesive 20 and contacting the cover 10, causing abnormal charging of the cover 10, the insulating member 30 cannot be too thick either, to prevent the end cap assembly from being excessively thick. Setting H1 < H2 ≤ 3H1 effectively meets the requirements for insulation isolation, structural strength, and thickness.

[0045] The third mounting hole 31 is a through hole extending through the thickness of the insulating member 30 (i.e., 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, without limitation. The size of the third mounting hole 31 is smaller than that of the first mounting hole 11. For example, if both the first mounting hole 11 and the third mounting hole 31 are circular holes, the diameter of the third mounting hole 31 is smaller than that of the first mounting hole 11, and the entire third mounting hole 31 is 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 restrict the position of the pole 50, thereby creating a gap between the pole 50 and the inner wall of the first mounting hole 11, thereby preventing the pole 50 from contacting the cover plate 10 and causing electrical anomalies in the cover plate 10.

[0046] The connecting piece 40 is disposed on the side of the insulating member 30 facing away from the cover plate 10. The connecting piece 40 is generally a thin sheet-like structure made of a conductive material, specifically aluminum, copper, etc., without limitation. The connecting piece 40 is used to weld to the tabs on the battery cell and connect to the terminal 50 to achieve an electrical connection between the battery cell and the terminal 50. Optionally, the thickness of the connecting piece 40 is ≥ 0.1 mm to meet electrical connection requirements.

[0047] 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, which 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 entirely 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.

[0048] The column 52 is passed through 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 passed through 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.

[0049] An installation method for the end cover assembly of the embodiment of the present disclosure 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 51 contact with the adhesive 20, and then using a hot pressing process to bond and fix the disk 51 to the adhesive 20; assembling the insulating part 30, setting the insulating part 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 part 30; setting the connecting piece 40 on the side of the insulating part 30 facing away from the cover plate 10, and welding the connecting piece 40 to the column 52.

[0050] The current conventional method for installing the cover structure is to inject a molded part onto the cover 10 and then install the pole 50 and the connecting piece 40. There is no connection between the pole 50, the connecting piece 40 and the molded part, resulting in poor connection reliability. The pole 50 and the connecting piece 40 are easily detached from the molded part and the cover 10.

[0051] 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 be connected. 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.

[0052] Conventional cover plate injection moldings currently require PFA (tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer) to meet sealing, insulation, and electrolyte corrosion resistance requirements. Research has shown this material to have adverse effects on the ecological environment and human health, leading some organizations to ban its use. Currently, there is no alternative material for this injection molding, necessitating a redesign of the cover plate structure and manufacturing process.

[0053] In the embodiment of the present disclosure, 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, satisfying H1<H2, 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 production and use is reduced.

[0054] 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.

[0055] The disclosed embodiment uses 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.

[0056] In one embodiment, referring to Figures 2 and 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.

[0057] The plate body 32 is roughly plate-shaped, and its shape roughly matches that of the cover plate 10. The plate body 32 also includes two opposite surfaces, 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 matched with 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 matched with the column 52, so that after the column 52 is inserted into the third mounting hole 31, it can be in close contact with the side wall of 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 a whole in any feasible manner, 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 passing through 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 serves to isolate 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 serves to isolate the connecting piece 40 and the cover plate 10, preventing the connecting piece 40 from being electrically conductive with the cover plate 10, thereby 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.

[0058] Optionally, referring to Figures 1 to 3, at the same radial position of the first mounting hole 11, the outer edge of the adhesive member 20 is flush with the outer edge of the disk body 51, or the adhesive member 20 protrudes beyond the outer 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.

[0059] 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 area of ​​the orthographic projection of the disk 51 on the first surface 12, and the orthographic projection of the disk 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.

[0060] The adhesive member 20 is relatively thin, with its outer edge connecting 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 also defines a second mounting hole 21, resulting in an inner edge connecting the surface of the adhesive member 20 bonded to the cover plate 10 and the surface facing away from the cover plate 10. Specifically, the outer edge of the adhesive member 20 is located on the outside of the adhesive member 20, while the inner edge of the adhesive member 20 is located in the middle of the second mounting hole 21. At least one of the outer edges of the adhesive member 20 is located outside of the outer edge of the disk 51 at the same location (i.e., at the same radial location of the first mounting hole 11), and no edge is located inside of the outer edge of the disk 51 at the same location. In other words, in the thickness direction of the cover plate 10, the orthographic projection of the disk 51 is within the orthographic projection of the outer contour of the adhesive member 20. Specifically, taking the example that the orthographic projections of the adhesive 20 and the disk body 51 on the first surface 12 are both rectangular, the four edges in the orthographic projection of the adhesive 20 and the four edges in the orthographic projection of the disk body 51 can correspond one to one, and 1, 2, 3, or 4 of the four edges of the orthographic projection of the adhesive 20 can be located outside the corresponding 1, 2, 3, or 4 edges of the four edges of the orthographic projection of the disk body 51. Except for the edges outside the corresponding edges of the four edges of the orthographic projection of the disk body 51, the remaining edges of the orthographic projection of the adhesive 20 can coincide with the corresponding edges of the orthographic projection of the disk body 51. Such arrangement allows the disk body 51 and the first surface 12 to be 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. Therefore, 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.

[0061] Optionally, referring to Figures 1 to 3, in the radial direction of the first mounting hole 11, the minimum size of the disc 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.

[0062] Specifically, in the radial direction of the first mounting hole 11 (refer to the previous description of the radial direction, which will not be repeated here), the disc body 51 can have different dimensions depending on its shape. For example, if the disc body 51 is a rectangular flat plate, its minimum dimension may be its width. Alternatively, if the disc body 51 is a circular disc, its minimum dimension may be its diameter. The same definition applies to the first mounting hole 11, the second mounting hole 21, the third mounting hole 31, the cylindrical body 33, and the column 52. In short, the various dimensions in this embodiment refer to the dimensions in the radial direction of the first mounting hole 11.

[0063] Meeting the requirement that the minimum size of the disk 51 is greater than the maximum size of the first mounting hole 11 prevents the disk 51 from falling 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, thus meeting the installation and fixing requirements. Meeting the requirement that the maximum size of the first mounting hole 11 is greater than or equal to the maximum size of the cylinder 33 allows the cylinder 33 to extend into the first mounting hole 11, thereby separating the column 52 from the cover plate 10. Meeting the requirement that the maximum size of the cylinder 33 is greater than the maximum size of the third mounting hole 31 allows the cylinder 33 to have a certain thickness, thereby separating the column 52 from the cover plate 10. Meeting the requirement that the maximum size of the third mounting hole 31 is greater than or equal to the maximum size of the column 52 allows the column 52 to pass through the third mounting hole 31, thereby achieving connection with the connecting piece 40, thus meeting the installation requirements.

[0064] Optionally, referring to Figures 2 and 3, the maximum size of the first mounting hole 11 is greater than the maximum size of the second mounting hole 21 and is greater than the maximum size of the column 52. The maximum size of the first mounting hole 11 is greater than the maximum size of the second mounting hole 21, so that the adhesive 20 at least partially extends into the space of the first mounting hole 11, that is, during the installation process, due to the insertion of the column 52 into the second mounting hole 21, there will be partial interference, extrusion, etc., causing the column 52 to bend the adhesive 20 near the second mounting hole 21, thereby causing the adhesive 20 to extend into the first mounting hole 11. Ensure that the disk 51 and the cover plate 10 are not directly face to face, and avoid electrical conduction caused by being too close and without the adhesive 20 separating them. The maximum size of the second mounting hole 21 is greater than 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.

[0065] Optionally, referring to FIG. 2 to FIG. 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 .

[0066] In other words, the total area enclosed by the outer edges of the orthographic projections of the plate body 32 on the second surface 13 is larger than the total area enclosed by the outer edges of the orthographic projections of the connecting piece 40 on the second surface 13, and the orthographic projections of the connecting piece 40 on the second surface 13 are all located within the space enclosed by the outer edges of the orthographic projections of the plate body 32 on the second surface 13.

[0067] Similar to the relationship between the aforementioned adhesive 20 and the outer 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.

[0068] Optionally, the insulating member 30 further includes a limiting structure 34 . The limiting structure 34 is disposed on a surface of the plate 32 facing away from the cylinder 33 . The connecting piece 40 is disposed in a space defined by the limiting structure 34 .

[0069] The specific structure of the limiting structure 34 is not limited. It is used to position and limit the connecting piece 40 so that the connecting piece 40 does not translate or rotate, ensuring structural stability after installation and enhancing reliability. The limiting structure 34 can be an integral structure or a separate structure with the plate body 32, without limitation.

[0070] 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 disposed at one end in the longitudinal direction of the plate 32, while the second limiting block 342 and the third limiting block 343 are disposed at the other end in the longitudinal direction of the plate 32. The second limiting block 342 and the third limiting block 343 are spaced apart in the width direction of the plate 32. One end of the connecting piece 40 faces the first limiting block 341 with a small gap therebetween, while 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 longitudinal direction, while 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 restricted and improving reliability.

[0071] Optionally, referring to Figures 2 and 3, the insulating member 30 also includes an anti-rotation column 35, which is arranged 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 opened on the second surface 13, and the anti-rotation column 35 extends into the limiting groove 14.

[0072] The anti-rotation post 35 can be a cylindrical, prism-shaped, or frustum-shaped structure, without limitation. The retaining groove 14 is a blind hole, and the anti-rotation post 35 extends into the retaining groove 14. Simultaneously, the barrel 33 extends into the first mounting hole 11, thereby retaining the insulating member 30 in position. The anti-rotation post 35 and the retaining groove 14 cooperate to prevent the insulating member 30 from rotating about the barrel 33, thereby providing a positioning and limiting function. The anti-rotation post 35 can be integral with or separate from the plate 32, without limitation.

[0073] 1 to 4 , an embodiment of the present disclosure further provides a battery device, comprising a shell (not shown), a battery cell (not shown) and an end cap assembly according to any of the foregoing embodiments, 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 40 of the end cap assembly.

[0074] The housing can be a square, cylindrical, or prismatic shell, without limitation. The battery cell can be a wound cell, a laminated cell, or other similar type, without limitation. The cell has tabs, which are welded to the connecting tabs 40 to achieve electrical connection between the cell and the connecting tabs 40. After the end cap assembly is assembled, the end cap assembly is aligned with the housing and welded together, ensuring that the edges of the end cap assembly's cover plate 10 are welded to the housing, thus enclosing the receiving cavity.

[0075] An embodiment of the present disclosure further provides an electric device, including an electric device and the battery device in the embodiment of the present disclosure, wherein the battery device supplies power to the electric device.

[0076] 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.

[0077] In the description of the embodiments of the present disclosure, 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 disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0078] The above disclosure is only a preferred embodiment of the present disclosure, and it is certainly not intended to limit the scope of the rights of the present disclosure. A person skilled in the art can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present disclosure are still within the scope of the present disclosure.

Claims

1. An end cap assembly, characterized in that: include: The cover plate (10) is provided with a first mounting hole (11); An adhesive member (20) is bonded to the cover plate (10), and the adhesive member (20) is provided with a second mounting hole (21), and the second mounting hole (21) corresponds to the first mounting hole (11); an insulating member (30) disposed on a side of the cover plate (10) facing away from the adhesive member (20), the insulating member (30) being provided with a third mounting hole (31), the third mounting hole (31) corresponding to the first mounting hole (11); The thickness of the adhesive component (20) is H1, and the thickness of the insulating component (30) is H2, satisfying the following relationship: H1<H2.

2. The end cap assembly according to claim 1, wherein: Also satisfies: H2≤3H1.

3. The end cap assembly according to claim 1, wherein: The cover plate (10) includes a first surface (12) and a second surface (13) facing each other, the first mounting hole (11) passes through the first surface (12) and the second surface (13), 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).

4. The end cap assembly according to claim 3, wherein: The end cover assembly further includes a pole (50), the pole (50) including a disk (51) and a column (52), one end of the column (52) is connected to the disk (51), the column (52) is passed through the first mounting hole (11), the second mounting hole (21) and the third mounting hole (31), and the disk (51) is bonded to the surface of the adhesive member (20) facing away from the cover plate (10).

5. The end cap assembly according to claim 4, wherein: At the same radial position of the first mounting hole (11), the outer peripheral edge of the adhesive member (20) is flush with the outer peripheral edge of the disc body (51), or the adhesive member (20) protrudes from the outer peripheral edge of the disc body (51).

6. The end cap assembly according to claim 4, wherein: In the radial direction of the first mounting hole (11), the minimum size of the disc (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).

7. The end cap assembly according to claim 4, wherein: In the radial direction of the first mounting hole (11), the maximum size of the first mounting hole (11) is greater than the maximum size of the second mounting hole (21) and is greater than the maximum size of the column (52).

8. The end cap assembly according to claim 4, wherein: The end cover assembly further comprises a connecting piece (40), the connecting piece (40) being arranged on a side of the insulating member (30) facing away from the cover plate (10), and the end of the column (52) away from the disk body (51) being connected to the connecting piece (40); 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).

9. The end cap assembly according to claim 8, wherein: The insulating member (30) further includes a limiting structure (34), wherein the limiting structure (34) is arranged on a surface of the plate body (32) facing away from the cylinder body (33), and the connecting piece (40) is arranged in a space enclosed by the limiting structure (34).

10. The end cap assembly according to claim 3, wherein: The insulating member (30) further includes an anti-rotation column (35), which is arranged 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).

11. The end cap assembly according to any one of claims 1 to 10, characterized in that: The adhesive (20) is any one of a polypropylene adhesive, a polyethersulfone adhesive, and a polyamide adhesive, and 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.

12. A battery device, characterized in that: The invention comprises a shell, a battery cell and an end cover 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 cover assembly is connected to the shell and closes the receiving cavity, and the battery cell is electrically connected to a connecting piece (40) of the end cover assembly.

13. An electrical device, characterized in that: The device 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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