Conductive column, cover plate assembly, battery, battery device and electric equipment

Abstract

The utility model relates to a conductive column, a cover plate assembly, a battery, a battery device and electric equipment. The conductive column is electrically connected between the battery cell and the conductive terminal and comprises a first section and a second section which are connected, the first section is used for being electrically connected with the battery cell, the second section is used for extending into the through hole of the conductive terminal, and an inner hole is formed in the end face, away from the first section, of the second section; the second section is used for being folded in the direction away from the center of the inner hole and making contact with the inner wall of the through hole for conduction. The wall thickness of the through hole of the conductive terminal along the first direction is smaller than the wall thickness of the through hole along the second direction, the wall thickness of the inner hole of the second section along the first direction is smaller than the wall thickness of the inner hole along the second direction, and the two directions are respectively perpendicular to the axial direction of the through hole. According to the conductive column, the inner hole with the thin wall thickness in the first direction is formed, so that the influence of the wall thickness of the inner hole on the wall thickness of the through hole is reduced, the influence of the folding force of the second section in the direction away from the center of the inner hole on the connection effect of the conductive terminal is reduced, and the connection strength of the conductive column is improved.

Description

Technical Field

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

[0002] The battery usually uses a cover plate to cooperate with the shell to seal the battery cell in the shell, and uses a conductive column that is connected to the battery cell so that the conductive column can pass through the cover plate to conduct with the external conductive terminal, so that the battery can be connected with the external circuit. In the prior art, the cover plate assembly of the battery usually uses a riveting process to allow the conductive column to be folded along the center direction away from the inner hole of the battery so as to contact and conduct with the inner wall of the through hole of the conductive terminal.

[0003] However, since the wall thickness of the through hole of the conductive terminal along the width direction is smaller than the wall thickness along the length direction, when the conductive column is riveted, the conductive column may cause the conductive terminal to deform along the width direction, thereby reducing the connection strength of the conductive column, reducing the connection stability of the cover assembly and the safety performance of the battery. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a conductive column with improved connection strength, a cover assembly including the conductive column, a battery including the cover assembly, a battery device including the battery, and an electrical device including the battery device. Specifically, the present application provides the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a conductive column, which is electrically connected between a battery cell and a conductive terminal, and the conductive column includes a first section and a second section connected to each other, the first section is used to be electrically connected to the battery cell, the second section is used to extend into a through hole of the conductive terminal, an end surface of the second section away from the first section is provided with an inner hole, and the second section is used to be folded in a direction away from the center of the inner hole and contact and conduct with the inner wall of the through hole;

[0006] The through hole of the conductive terminal has a wall thickness along the first direction that is smaller than that along the second direction. The inner hole of the second section has a wall thickness along the first direction that is smaller than that along the second direction. The first direction and the second direction are respectively perpendicular to the axial direction of the through hole.

[0007] The conductive column of the present application is provided with an inner hole with a thicker wall thickness along the second direction to increase the thickness of the end of the second section away from the first section after being folded along the center direction away from the inner hole, thereby reducing the influence of the deformation of the second section away from the center direction of the inner hole on the material thickness, thereby improving the structural strength of the conductive column of the present application. At the same time, the inner hole with a thinner wall thickness along the first direction is provided to reduce the influence of the inner hole wall thickness on the through hole wall thickness, thereby ensuring the fit between the second section and the inner wall of the through hole, while reducing the influence of the force that causes the second section to be folded along the center direction away from the inner hole on the external structure, thereby improving the connection strength of the conductive column of the present application.

[0008] In one embodiment, the difference between the wall thickness of the inner hole of the second section along the second direction and the wall thickness of the inner hole of the second section along the first direction is greater than or equal to 0.3 mm.

[0009] In one embodiment, the wall thickness of the inner hole along the first direction is greater than or equal to 0.5 mm and less than or equal to 2.5 mm.

[0010] In one embodiment, the wall thickness of the inner hole gradually increases along the axial direction of the inner hole toward the battery core.

[0011] In one embodiment, along the axial direction of the inner hole, the cross-sectional shape of the inner hole is a trapezoid, and the angle between the hole wall of the inner hole and the end face of the second section away from the first section is greater than or equal to 95° and less than or equal to 130°; and / or, a chamfer is provided between the end face of the second section away from the first section and the outer surface of the second section.

[0012] In one embodiment, along the axial direction of the inner hole, the depth of the inner hole is less than the thickness of the conductive column; and / or, the hole wall of the inner hole is provided with a protrusion protruding in a direction close to the center of the inner hole, and along the axial direction of the inner hole, one end of the protrusion is spaced apart from the end surface of the second section away from the first section, and the other end extends toward the bottom surface of the inner hole and contacts with the bottom surface of the inner hole.

[0013] In one embodiment, along the axial direction of the inner hole, the depth of the inner hole is greater than or equal to 0.5 mm.

[0014] In one embodiment, the conductive column further includes two identification holes, and the two identification holes are arranged at intervals along the second direction on the bottom surface of the inner hole.

[0015] In the second aspect, an embodiment of the present application provides a cover plate assembly, including a cover plate, a conductive terminal, and a conductive column. The cover plate is used to cooperate with an external shell to achieve sealing of the battery cell in the shell. The conductive terminal is fixed to a side of the cover plate away from the battery cell. The second section of the conductive column extends into the through hole of the conductive terminal and the second section is folded in a direction away from the center of the inner hole and contacts the inner wall of the through hole to be electrically connected.

[0016] In one embodiment, the cover assembly also includes a first insulating member, which is disposed on a surface of the cover facing the conductive terminal, and the conductive terminal is embedded in a surface of the first insulating member away from the cover, and the second section of the conductive column passes through the first insulating member and is folded in a direction away from the center of the inner hole and electrically connected to the inner wall of the through hole.

[0017] In one embodiment, a limiting portion is provided on the outer surface of the second section of the conductive column, and the limiting portion protrudes in a direction away from the center of the inner hole. Along the axial direction of the inner hole, one end of the limiting portion is spaced apart from the end surface of the second section away from the first section, and the other end extends toward the first section and partially extends into the first section; along the axial direction of the inner hole, the surface of the conductive terminal in contact with the first insulating member is spaced apart from the limiting portion.

[0018] In one embodiment, the inner wall of the through hole is provided with a protrusion protruding in a direction close to the center of the through hole, and along the axial direction of the through hole, one end of the protrusion is spaced apart from the end surface of the conductive terminal away from the cover plate, and the other end extends to the end surface of the conductive terminal close to the cover plate, and the outer surface of the conductive column is at least partially in contact with the protrusion.

[0019] In one embodiment, along the axial direction of the through hole, the distance between the end surface of the conductive terminal away from the cover plate and the protrusion is greater than or equal to 0.5 mm and less than or equal to 1.4 mm; and / or, along the direction close to the center of the through hole, the protrusion height is greater than or equal to 0.1 mm and less than or equal to 0.6 mm.

[0020] In one embodiment, the cover assembly further includes a second insulating member, which is disposed on a side of the cover away from the conductive terminal. The first section of the conductive column sequentially passes through the cover and the second insulating member and is partially exposed on a surface of the second insulating member away from the cover.

[0021] In one embodiment, the cover plate assembly further includes a sealing ring, which is sleeved on the outer edge of the conductive column and extends into the second insulating member along the axial portion of the through hole to shield the gap between the conductive column and the second insulating member.

[0022] In one embodiment, the cover plate assembly further includes a lead-out plate connected to an end portion of the conductive column exposed from the second insulating member, and the lead-out plate is used to be electrically connected to the battery cell.

[0023] On the third aspect, an embodiment of the present application provides a battery, including a shell, a battery cell, and a cover assembly. The battery cell is accommodated in the shell, and the cover assembly is connected to the opening of the shell to cooperate with the shell to seal the battery cell. The first section of the conductive column of the cover assembly is electrically connected to the battery cell.

[0024] In a fourth aspect, an embodiment of the present application provides a battery device, including a battery tray and a battery, wherein the battery is accommodated in the battery tray.

[0025] In a fifth aspect, an embodiment of the present application provides an electrical device, including a battery device, or a battery.

[0026] It can be understood that the cover assembly, battery, battery device and electrical equipment provided in the second to fifth aspects of the present application all have the effect of improving the connection strength due to the use of the conductive column provided in the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a battery provided in one embodiment of the present application;

[0028] Figure 2 This is a schematic structural diagram of a cover plate assembly provided in one embodiment of the present application;

[0029] Figure 3 This is an exploded schematic diagram of a cover plate assembly provided in one embodiment of the present application;

[0030] Figure 4 A cross-sectional schematic diagram of a cover plate assembly provided in one embodiment of the present application;

[0031] Figure 5 Another cross-sectional schematic diagram of a cover plate assembly provided in an embodiment of the present application;

[0032] Figure 6 A partially enlarged schematic diagram of a cover plate assembly provided in one embodiment of the present application;

[0033] Figure 7 A schematic diagram of the structure of a conductive column provided in an embodiment of the present application;

[0034] Figure 8 A schematic diagram of a top view of a conductive column provided in an embodiment of the present application;

[0035] Fig. 9 A schematic cross-sectional view of a conductive column provided in one embodiment of the present application;

[0036] Fig.10 It is a partial enlarged schematic diagram of a conductive column provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0038] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying 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 to the present application.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "including" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0041] The present application provides an electric device. Exemplarily, the electric device is a vehicle, which includes a vehicle body and a battery device, and the battery device is housed in the vehicle body to provide electric energy to the vehicle body. It is understandable that the battery device of the present application can also be applied to other electric devices, and the present application specifically limits this step.

[0042] Specifically, the battery device includes a battery tray and a battery 200. A plurality of batteries 200 are provided and arranged in the battery tray. The battery tray is used to accommodate and protect the batteries 200. The batteries 200 are connected in series or in parallel to provide electric energy with different voltages and powers.

[0043] See also Figure 1 A schematic diagram of the structure of a battery 200 provided in one embodiment of the present application is shown.

[0044] like Figure 1 As shown, the battery 200 of the present application includes a housing 201, a cover assembly 100 and a battery cell (not shown in the figure), and the battery cell is accommodated in the housing 201. There are two cover assemblies 100, namely a positive cover assembly 100a and a negative cover assembly 100b, which are respectively fixed to opposite sides of the housing 201 along the length direction of the housing 201 to cooperate with the housing 201 to achieve sealing of the battery cell.

[0045] The end of the conductive column 30 in the positive electrode cover plate assembly 100a extends into the housing 201 and is electrically connected to the positive electrode ear of the battery cell, and the end of the conductive column 30 in the negative electrode cover plate assembly 100b extends into the housing 201 and is electrically connected to the negative electrode ear of the battery cell. The external circuit can be respectively connected to the end of the conductive column 30 in the positive electrode cover plate assembly 100a away from the battery cell and the end of the conductive column 30 in the negative electrode cover plate assembly 100b away from the battery cell.

[0046] It can be understood that the battery cell can cooperate with the electrolyte (not shown in the figure) inside the housing 201 to convert the current input from the external circuit through the two conductive posts 30 in the two cover plate assemblies 100 into chemical energy and store it in the electrolyte. The battery cell can also cooperate with the electrolyte to convert the chemical energy stored in the electrolyte into electrical energy and output it to the external circuit through the two conductive posts 30 in the two cover plate assemblies 100. Thereby realizing the charging function and discharging function of the battery 200 of the present application.

[0047] See also Figure 2 The structural diagram of the cover plate assembly 100 provided in one embodiment of the present application is shown in FIG. Figure 3 The exploded schematic diagram of the cover plate assembly 100 provided in one embodiment of the present application is shown in FIG. Figure 4 The cross-sectional view of the cover plate assembly 100 provided in one embodiment of the present application is shown in FIG. Figure 1 .

[0048] like Figure 1-Figure 4As shown, the cover plate assembly 100 of the present application includes a cover plate 10, a conductive terminal 20 and a conductive column 30. The cover plate 10 is used to cooperate with the housing 201 to achieve sealing of the battery cell (not shown in the figure). The conductive terminal 20 is fixed to the side of the cover plate 10 away from the battery cell.

[0049] The cover plate 10 is provided with a first positioning hole 11, and the conductive terminal 20 is provided with a through hole 21. The axis of the first positioning hole 11 coincides with the axis of the through hole 21, and the shape of the first positioning hole 11 is the same as the shape of the through hole 21. One end of the conductive column 30 extends into the through hole 21, and the outer surface of the conductive column 30 is in contact with the inner wall of the through hole 21, and the other end of the conductive column 30 passes through the first positioning hole 11 and is electrically connected to the battery cell, so as to achieve conduction between the inside and outside of the battery 200 of the present application.

[0050] The conductive column 30 includes a first section 31 and a second section 32 connected to each other. The first section 31 passes through the first positioning hole 11 and is used to be electrically connected to the battery cell. The second section 32 extends into the through hole 21 and is in contact with the inner wall of the through hole 21. The end surface of the second section 32 away from the first section 31 is provided with an inner hole 33. The axis of the inner hole 33 coincides with the axis of the through hole 21, and the shape of the second section 32 is the same as that of the through hole 21.

[0051] Specifically, in the process of preparing the cover plate assembly 100 of the present application, as Figure 5 As shown, the first section 31 of the conductive column 30 needs to be passed through the first positioning hole 11 in advance, and the second section 32 of the conductive column 30 needs to be extended into the through hole 21. Then, under the action of external force, the second section 32 of the conductive column 30 can be folded in a direction away from the center of the inner hole 33 until it contacts and fits with the inner wall of the through hole 21, thereby achieving electrical connection between the conductive column 30 and the conductive terminal 20.

[0052] In this application, the center of a hole refers to the geometric center of a regularly shaped hole, or a similar geometric center of an irregularly shaped hole. In the embodiment of this application, the center of the inner hole 33 is located on the axis of the inner hole 33 .

[0053] It can be understood that in the embodiment of the present application, the conductive column 30 can be fixedly connected to the cover plate 10 by using a riveting process, and the riveting punch can be extended into the inner hole 33. The component force away from the center direction of the inner hole 33 generated by the axial movement of the riveting punch along the through hole 21 can enable the second section 32 to be folded in a direction away from the center of the inner hole 33 and fit the inner wall of the through hole 21, thereby achieving connection and conduction between the second section 32 and the through hole 21.

[0054] In another embodiment, a folding process may be used to fold the second section 32 in all directions away from the center of the inner hole 33 under the action of an external force, and the outer surface of the folded second section 32 is connected to the inner wall of the through hole 21 by welding to achieve the fit and conduction between the second section 32 and the through hole 21. In other embodiments, the second section 32 of the conductive column 30 may be prepared in advance into a desired shape, and other fixing processes may be used to achieve the fit and conduction between the second section 32 and the through hole 21. This application does not impose any particular restrictions on this.

[0055] See also Figure 6 The illustrated diagram is a partially enlarged schematic diagram of a cover plate assembly 100 provided in one embodiment of the present application. Figure 5 .in, Figure 6 for Figure 5 A partial enlarged schematic diagram of .

[0056] like Figure 5 and Figure 6 As shown, the inner wall of the through hole 21 is provided with a protrusion 22, and the protrusion 22 protrudes in a direction close to the center of the through hole 21. Along the axial direction of the through hole 21, one end of the protrusion 22 is spaced from the end surface of the conductive terminal 20 away from the cover plate 10, and the other end extends to the end surface of the conductive terminal 20 close to the cover plate 10. Among them, the protrusion 22 is annular and surrounds the outer edge of the second section 32 of the conductive column 30. It can be understood that when the second section 32 is folded in a direction away from the center of the inner hole 33 under the action of external force, the outer surface of the second section 32 close to the first section 31 will be in contact with the protrusion 22 under the action of external force.

[0057] When the second section 32 is folded in a direction away from the center of the inner hole 33 under the action of an external force, the deformation amount of the end of the second section 32 away from the first section 31 in the direction away from the center of the inner hole 33 is greater than the deformation amount of the end of the second section 32 close to the first section 31. It can be understood that the protrusion 22 is provided on the inner wall of the through hole 21, which can reduce the distance between the part of the second section 32 with a smaller deformation amount and the inner wall of the through hole 21 in the manufacturing process of the cover plate assembly 100 of the present application, and avoid the situation that only the part of the second section 32 away from the first section 31 is attached to the inner wall of the through hole 21, thereby increasing the attachment area of ​​the second section 32 and the conductive terminal 20, improving the connection stability of the conductive column 30 and the conductive terminal 20, and further improving the connection stability of the cover plate assembly 100 of the present application, and improving the safety performance of the battery 200 of the present application.

[0058] In one embodiment, if Figure 5 and Figure 6 As shown, along the axial direction of the through hole 21 , there is a first height H1 between the end surface of the conductive terminal 20 away from the cover plate 10 and the protrusion 22 , and the first height H1 is greater than or equal to 0.5 mm and less than or equal to 1.4 mm.

[0059] Based on the large deformation amount of the end of the second section 32 away from the first section 31 in the direction away from the center of the inner hole 33, it can be understood that when the first height H1 is less than 0.5 mm, the end of the protrusion 22 away from the cover plate 10 will block the deformation of the part of the second section 32 away from the first section 31 in the direction away from the center of the inner hole 33, thereby causing external force to act on the first insulating member 40 through the conductive terminal 20, causing the first insulating member 40 to burst. This affects the safety performance of the cover plate assembly 100 of the present application.

[0060] At the same time, the blocking of the folding of part of the second section 32 along the direction away from the center of the inner hole 33 by the protrusion 22 may cause a large stress concentration in the second section 32 at the junction of the end of the protrusion 22 away from the cover plate 10, thereby causing part of the second section 32 to crack or even break under the action of external force, thereby affecting the yield rate of the cover plate assembly 100 of the present application.

[0061] On the other hand, as the distance from the first section 31 along the axial direction of the inner hole 33 decreases, the deformation amount of the second section 32 in the direction away from the center of the inner hole 33 will gradually decrease. It can be understood that when the first height H1 is greater than 1.4 mm, the proportion of the protrusion 22 in the through hole 21 will be reduced, which may result in the middle of the second section 32 extending into the through hole 21 being spaced from the inner wall of the through hole 21 along the direction close to the center of the through hole 21, thereby reducing the contact area between the second section 32 and the conductive terminal 20, and reducing the connection stability of the cover assembly 100 of the present application.

[0062] That is, the cover assembly of the present application limits the first height H1 to be greater than or equal to 0.5 mm and less than or equal to 1.4 mm, so as to ensure that the protrusion 22 increases the contact area between the second section 32 and the conductive terminal 20, while reducing the blocking effect of the protrusion 22 on the deformation of the second section 32 along the direction away from the center of the inner hole 33 during the preparation process of the cover assembly 100 of the present application, avoiding the first insulating member 40 from bursting, thereby improving the safety performance of the cover assembly 100 of the present application and improving the yield rate of the cover assembly 100 of the present application.

[0063] In one embodiment, if Figure 5 and Figure 6As shown, along the direction close to the center of the through hole 21, the protruding height W of the protrusion 22 is greater than or equal to 0.1 mm and less than or equal to 0.6 mm. As the distance from the first section 31 along the axial direction of the inner hole 33 decreases, the deformation amount of the second section 32 along the direction away from the center of the inner hole 33 will gradually decrease. It can be understood that when the protruding height W is less than 0.1 mm, the fitting area between the second section 32 and the protruding portion 22 along the direction away from the center of the inner hole 33 may be reduced, and when the conductive terminal 20 is subjected to axial tension, there is a risk of falling off the cover plate 10, reducing the connection strength between the conductive column 30 and the conductive terminal 20.

[0064] Based on the second section 32 extending into the through hole 21, it can be understood that when the protrusion height W is greater than 0.6 mm, the material at the end of the conductive column 30 will not fill the space of the conductive terminal 20, and a gap will be formed axially between the conductive column 30 and the conductive terminal 20, thereby reducing the connection stability of the cover assembly 100 of the present application.

[0065] That is, the cover assembly 100 of the present application limits the protruding height W of the protrusion 22 to be greater than or equal to 0.1 mm and less than or equal to 0.6 mm, so as to increase the fitting area between the second section 32 and the protrusion 22 while ensuring the extension space of the conductive column 30, thereby improving the connection strength and stability of the cover assembly 100 of the present application.

[0066] In one embodiment, if Figure 5 and Figure 6 As shown, the angle between the end surface of the protrusion 22 away from the cover plate 10 and the side wall of the protrusion 22 facing the conductive column 30 is a right angle. As the distance from the first section 31 along the axial direction of the inner hole 33 decreases, the deformation of the second section 32 along the direction away from the center of the inner hole 33 will gradually decrease. It can be understood that when the second section 32 contacts the conductive terminal 20, the outer surface of the second section 32 may have a certain slope.

[0067] Thus, the angle between the end surface of the protrusion 22 away from the cover plate 10 and the side wall of the protrusion 22 toward the conductive column 30 is set to a right angle, which can prevent the conductive terminal 20 from slipping out when subjected to external tension, thereby improving the connection strength of the cover plate assembly 100 of the present application.

[0068] In one embodiment, please refer to Figure 2 and Figure 3The cover assembly 100 of the present application further includes a first insulating member 40, the first insulating member 40 is provided with a mounting groove 41, and a second positioning hole 42 is provided at the bottom of the mounting groove 41. The first insulating member 40 is fixed to the surface of the cover 10 facing the conductive terminal 20, the conductive terminal 20 is embedded in the mounting groove 41, and the end of the conductive column 30 away from the cover 10 passes through the second positioning hole 42 and extends into the through hole 21. The axis of the second positioning hole 42 coincides with the axis of the first positioning hole 11, and the shape of the second positioning hole 42 is the same as the shape of the first positioning hole 11. The first insulating member 40 is used to achieve insulation between the conductive terminal 20 and the cover 10.

[0069] In one embodiment, if Figure 2 and Figure 3 As shown, the conductive terminal 20 is in a sheet shape, and along the axial direction perpendicular to the through hole 21, the conductive terminal 20 has a first direction 001 and a second direction 002 perpendicular to each other. The first direction 001 is the width direction of the conductive terminal 20, the second direction 002 is the length direction of the conductive terminal 20, and the axial direction of the through hole 21 is the third direction 003.

[0070] Since the width of the conductive terminal 20 is smaller than the length of the conductive terminal 20 , it can be understood that the wall thickness of the through hole 21 of the conductive terminal 20 along the first direction 001 is smaller than the wall thickness of the through hole 21 of the conductive terminal 20 along the second direction 002 .

[0071] For the conductive pillar 30, see Figure 7 The schematic diagram of the structure of the conductive column 30 provided in one embodiment of the present application is shown in FIG. Figure 8 FIG. 1 is a top view of a conductive column 30 provided in an embodiment of the present application. Figure 2 and Figure 3 .

[0072] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, the wall thickness of the inner hole 33 of the second section 32 along the first direction 001 is less than the wall thickness of the inner hole 33 along the second direction 002. Since the wall thickness of the through hole 21 of the conductive terminal 20 along the first direction 001 is less than the wall thickness of the through hole 21 along the second direction 002, and the size of the conductive terminal 20 in the first direction 001 and the second direction 002 is fixed. It can be understood that, along the first direction 001, providing the inner hole 33 with a thinner wall thickness can reduce the hole wall proportion of the inner hole 33 in the cover plate assembly 100 along the first direction 001, thereby increasing the inner wall proportion of the through hole 21 and increasing the wall thickness of the through hole 21.

[0073] The wall thickness of the through hole 21 along the first direction 001 is increased so that during the preparation process of the cover assembly 100, when the second section 32 is folded along the center direction away from the inner hole 33, after the second section 32 contacts the inner wall of the through hole 21, the external force transmitted to the first insulating member 40 via the conductive terminal 20 can be reduced, thereby preventing the first insulating member 40 from bursting under the action of this part of the external force and causing insulation failure, thereby improving the connection strength of the conductive column 30 of the present application and improving the safety performance of the cover assembly 100 of the present application.

[0074] At the same time, an inner hole 33 with a thicker wall thickness is provided along the second direction 002, which can increase the thickness of the end of the second section 32 away from the first section 31 after being folded along the center direction away from the inner hole 33, thereby reducing the influence of the deformation of the second section 32 along the center direction away from the inner hole 33 on the thickness of its own material during the preparation process of the cover assembly 100 of the present application, thereby improving the structural strength of the conductive column 30 of the present application, and improving the structural strength of the cover assembly 100 of the present application.

[0075] Therefore, compared with the conductive column with the same wall thickness in the direction away from the center of the inner hole 33 in the prior art, the conductive column 30 of the present application is provided with an inner hole 33 with a thicker wall thickness in the second direction 002 to reduce the influence of the deformation of the second section 32 in the direction away from the center of the inner hole 33 on the material thickness, thereby improving the structural strength of the conductive column 30 of the present application. At the same time, the inner hole 33 with a thinner wall thickness in the first direction 001 is provided to reduce the influence of the wall thickness of the inner hole 33 on the wall thickness of the through hole 21, thereby reducing the influence of the force that causes the second section 32 to be folded in the direction away from the center of the inner hole 33 on the external first insulating member 40, thereby improving the connection strength of the conductive column 30 of the present application.

[0076] When the conductive column 30 of the present application is applied to the cover assembly 100 and the battery 200, the conductive column 30 is provided with an inner hole 33 with a thinner wall thickness along the first direction 001 to reduce the influence of the wall thickness of the inner hole 33 on the deformation of the through hole 21 and the first insulating member 40, thereby improving the insulation performance of the cover assembly 100 of the present application and the strength of the conductive terminal 20, and improving the safety performance of the battery 200 of the present application.

[0077] In one embodiment, if Figure 1-Figure 8 As shown, the conductive column 30 of the present application is in the shape of a racetrack. It can be understood that along the first direction 001, the second section 32 forming the inner hole 33 is in a straight line, and along the second direction 002, the second section 32 forming the inner hole 33 is in an arc shape.

[0078] Based on the fact that the deformation of the arc-shaped structure is greater than that of the linear structure under the same external force, it can be understood that the conductive column 30 of the present application is provided with an inner hole 33 with a thicker wall thickness along the second direction 002, which can increase the wall thickness in the second direction 002 after the conductive column 30 is connected, thereby improving the structural strength of the cover plate assembly 100 of the present application and improving the safety performance of the battery 200 of the present application.

[0079] For ease of description, the present embodiment and subsequent embodiments limit the shape of the conductive column 30 to a racetrack shape. However, in actual situations, the shape, size and size of the conductive column 30 may also be other shapes, and the present application does not impose any particular limitation on this.

[0080] In one embodiment, if Figure 7 and Figure 8 As shown, along the first direction 001, the inner hole 33 has a first wall thickness D1, and along the second direction 002, the inner hole 33 has a second wall thickness D2. The difference between the second wall thickness D2 and the first wall thickness D1 is greater than or equal to 0.3 mm.

[0081] Since the increase in wall thickness will increase the external force required to deform the second section 32 in the direction away from the center of the inner hole 33, and the decrease in wall thickness will reduce the structural strength of the end of the second section 32 away from the first section 31. It can be understood that by setting the difference between the wall thicknesses of the inner hole 33 to be greater than or equal to 0.3 mm, it is possible to reduce the external force that causes the second section 32 to deform in the direction away from the center of the inner hole 33 while ensuring the structural strength of the end of the second section 32 away from the first section 31, thereby reducing the difficulty of installing the conductive column 30 of the present application and improving the installation efficiency of the cover assembly 100 of the present application.

[0082] In one embodiment, if Figure 7 and Figure 8 As shown, the first wall thickness D1 is greater than or equal to 0.5 mm and less than or equal to 2.5 mm. It can be understood that when the first wall thickness D1 is less than 0.5 mm, after the second section 32 is folded in a direction away from the center of the inner hole 33, the end of the second section 32 away from the first section 31 has a smaller thickness, thereby reducing the structural strength of the end of the second section 32 away from the first section 31, thereby reducing the structural strength of the conductive column 30 of the present application and reducing the structural strength of the cover assembly 100 of the present application.

[0083] At the same time, the first wall thickness D1 is less than 0.5 mm, which may also cause the second section 32 to break during the folding process along the direction away from the center of the inner hole 33 due to the thin wall thickness, thereby affecting the connection effect of the conductive column 30 of the present application and affecting the yield rate of the cover assembly 100 of the present application.

[0084] On the other hand, based on the limited space of the cover assembly 100 in the first direction 001, it is understandable that when the first wall thickness D1 is greater than 2.5 mm, the wall thickness of the through hole 21 in the first direction 001 will be reduced. Under the premise of ensuring that the second section 32 fits the inner wall of the through hole 21, the external force acting on the second section 32 may be transmitted to the first insulating member 40 via the conductive terminal 20, thereby causing the first insulating member 40 to rupture. This affects the insulation performance of the first insulating member 40, thereby reducing the yield rate of the cover assembly 100 of the present application.

[0085] That is, by limiting the first wall thickness D1 to be greater than or equal to 0.5 mm and less than or equal to 2.5 mm, the conductive column 30 of the present application can ensure the structural strength after the conductive column 30 is connected to the conductive terminal 20, while reducing the possibility of fracture due to the first wall thickness D1 being too thin during the preparation process of the cover assembly 100, and the possibility of the first insulating member 40 being ruptured due to the wall thickness of the through hole 21 in the first direction 001 being too thin. Thereby, the yield rate of the cover assembly 100 of the present application is improved.

[0086] See also Fig. 9 The cross-sectional diagram of the conductive column 30 provided in one embodiment of the present application is shown in FIG. Fig.10 FIG. 1 is a partial enlarged schematic diagram of a conductive column 30 provided in an embodiment of the present application. Figure 3 .

[0087] like Figure 3 , Fig. 9 and Fig.10 As shown, the wall thickness of the inner hole 33 gradually increases along the third direction 003 toward the battery core (not shown in the figure). When the second section 32 is folded in the direction away from the center of the inner hole 33 under the action of external force, the deformation amount of the second section 32 in the direction away from the center of the inner hole 33 will gradually decrease in the direction toward the battery core along the third direction 003, and for the second section 32, the greater the deformation amount of the second section 32 in the direction away from the center of the inner hole 33, the greater the external force required, and the thicker the wall thickness of the second section 32, the greater the external force required to produce the deformation.

[0088] It can be understood that an inner hole 33 with a wall thickness gradually increasing along the third direction 003 toward the battery cell is set so that the second section 32 can be deformed under the action of external force, reducing the difficulty of folding the second section 32 along the direction away from the center of the inner hole 33, thereby improving the installation efficiency of the conductive column 30 of the present application and improving the installation efficiency of the cover assembly 100 of the present application.

[0089] Specifically, in one embodiment, Figure 3 , Fig. 9 and Fig.10As shown, along the third direction 003, the cross-sectional shape of the inner hole 33 is a trapezoid, and the angle A between the hole wall of the inner hole 33 and the end surface of the second section 32 away from the first section 31 is greater than or equal to 95° and less than or equal to 130°. It can be understood that when the angle A is less than 95°, the wall thickness of the inner hole 33 along the third direction 003 does not change significantly, and even the wall thickness of the end of the second section 32 away from the first section 31 is thicker than the rest of the wall thickness of the inner hole 33, thereby increasing the difficulty of connecting the conductive column 30 with the rest of the structure of the cover assembly 100 in the subsequent process.

[0090] When the angle A is greater than 130°, in order to satisfy the size relationship between the first wall thickness D1 and the second wall thickness D2, the cross-sectional area of ​​the inner hole 33 along the third direction 003 relatively close to the bottom of the first section 31 will be reduced, thereby increasing the difficulty of subsequent processes to achieve connection between the conductive column 30 and the remaining structures of the cover assembly 100.

[0091] That is, the conductive column 30 of the present application limits the angle A of the inner hole 33 to be greater than or equal to 95° and less than or equal to 130°, which can reduce the external force required to fold the second section 32 in a direction away from the center of the inner hole 33, and reduce the difficulty of connecting the conductive column 30 and the conductive terminal 20 in subsequent processes, thereby improving the installation efficiency of the conductive column 30 of the present application and improving the installation efficiency of the cover assembly 100 of the present application.

[0092] In one embodiment, if Figure 3 , Fig. 9 and Fig.10 As shown, a chamfer 34 is provided between the end surface of the second section 32 away from the first section 31 and the outer surface of the second section 32. Since the outer surface of the second section 32 needs to fit with the inner wall of the through hole 21 of the conductive terminal 20, when the second section 32 is folded in a direction away from the center of the inner hole 33 under the action of an external force, the deformation amount of the second section 32 in the direction away from the center of the inner hole 33 will gradually decrease along the third direction 003 toward the direction of the battery cell.

[0093] It can be understood that the setting of the chamfer 34 makes it possible that when preparing the cover assembly 100 of the present application, the gap between the outer surface of the second section 32 and the inner surface of the through hole 21 gradually decreases along the third direction 003 toward the battery cell (not shown in the figure), so as to match the change in the deformation amount of the second section 32 along the direction away from the center of the inner hole 33, further increase the fitting area between the outer surface of the second section 32 and the conductive terminal 20, further improve the connection stability of the conductive column 30 of the present application, and improve the connection strength of the cover assembly 100 of the present application.

[0094] In one embodiment, if Figure 3 , Fig. 9 and Fig.10As shown, along the axial direction of the inner hole 33, the depth of the inner hole 33 is less than the thickness of the conductive column 30, and the hole wall of the inner hole 33 is provided with a protrusion 35. Along the third direction 003, one end of the protrusion 35 is spaced apart from the end surface of the second section 32 away from the first section 31, and the other end extends toward the bottom surface of the inner hole 33 and contacts with the bottom surface of the inner hole 33.

[0095] Based on the relatively small deformation amount of the hole wall near the bottom surface of the inner hole 33 in the direction away from the center of the inner hole 33, it can be understood that the arrangement of the protrusion 35 can increase the thickness of the hole wall near the bottom surface of the inner hole 33 without affecting the folding of the second section 32 in the direction away from the center of the inner hole 33, thereby improving the structural strength of the conductive column 30 of the present application, and further improving the structural strength of the cover plate assembly 100 of the present application.

[0096] In one embodiment, if Figure 3 , Fig. 9 and Fig.10 As shown, along the third direction 003, the depth H2 of the inner hole 33 is greater than or equal to 0.5 mm. Based on the preparation process of the cover assembly 100 of the present application, the structure between the outer surface of the second section 32 and the hole wall of the inner hole 33 is essentially folded away from the center of the inner hole 33 to achieve contact and conduction with the conductive terminal 20. It can be understood that when the depth H2 is less than 0.5 mm, the contact area between the second section 32 and the inner wall of the through hole 21 will decrease as the depth H2 decreases, thereby reducing the connection strength between the conductive column 30 and the conductive terminal 20, affecting the connection stability of the cover assembly 100 of the present application.

[0097] At the same time, if the depth H2 is too small, it will increase the difficulty of folding the second section 32 away from the center of the inner hole 33. In order to ensure the connection between the second section 32 and the conductive terminal 20, a larger external force is usually required, thereby increasing the connection difficulty of the conductive column 30 of the present application and the connection difficulty of the cover assembly 100 of the present application.

[0098] On the other hand, when the riveting process is used to connect the conductive column 30, the riveting punch required by the riveting process uses the component force generated by the riveting punch in the direction away from the center of the inner hole 33 when the second section 32 is folded in the direction away from the center of the inner hole 33. That is, the increase in external force causes the riveting punch to increase the component force in the direction away from the center of the inner hole 33, while also increasing the axial component force generated by the riveting punch. When the axial component force acts on the conductive column 30, it may affect other structures of the cover plate assembly 100 of the present application that are in contact with the conductive column 30, and may reduce the yield rate of the cover plate assembly 100 of the present application.

[0099] That is, by limiting the depth H2 of the inner hole 33 to be greater than or equal to 0.5 mm, the connection effect between the second section 32 and the conductive terminal 20 can be ensured while reducing the connection difficulty of the conductive column 30 of the present application, thereby improving the connection stability and yield rate of the cover assembly 100 of the present application.

[0100] In one embodiment, please refer to Figure 7-10 The first section 31 and the second section 32 are made of different materials. In the third direction 003, the depth H2 of the inner hole 33 is less than the thickness of the second section 32 to avoid the depth H2 being too deep and affecting the connection strength of the connection surface between the first section 31 and the second section 32, thereby ensuring the structural stability of the conductive column 30 of the present application. The depth H2 is less than 2 mm.

[0101] It is understandable that in other embodiments, the first section 31 and the second section 32 may also be made of the same material, and correspondingly, the depth H2 of the inner hole 33 is less than the thickness of the conductive column 30. This application does not impose any particular limitation on this.

[0102] In one embodiment, please refer to Figure 1-Figure 10 The cover plate assembly 100 of the present application further includes a sealing ring 50 and a second insulating member 60. The second insulating member 60 is fixed to the side of the cover plate 10 away from the conductive terminal 20 to achieve insulation between the cover plate 10 and the internal environment of the battery 200. The second insulating member 60 includes a third positioning hole 61, wherein the third positioning hole 61 is coaxially arranged with the first positioning hole 11 and the second positioning hole 42 and has the same shape, and the aperture of the third positioning hole 61 is larger than the aperture of the first positioning hole 11 and the aperture of the second positioning hole 42.

[0103] The sealing ring 50 is sleeved on the outer edge of the conductive column 30 and partially extends into the third positioning hole 61 along the third direction 003. The outer surface of the sealing ring 50 abuts against the inner wall of the third positioning hole 61 to cooperate with the second insulating member 60 to achieve sealing of the internal environment of the shell 201 and prevent the electrolyte from overflowing through the gap between the conductive column 30 and the third positioning hole 61.

[0104] like Figure 4 As shown, the second section 32 of the conductive column 30 passes through the third positioning hole 61, the first positioning hole 11, and the second positioning hole 42 in sequence through the sealing ring 50 until it extends into the through hole 21. Part of the first insulating member 40 also extends into the third positioning hole 61, abutting against the sealing ring 50, and plays a role in physical insulation.

[0105] In one embodiment, please refer to Figure 5-Figure 7The outer surface of the second section 32 is provided with a limiting portion 36, which protrudes along the center direction close to the inner hole 33, wherein along the third direction 003, one end of the limiting portion 36 is spaced from the end surface of the second section 32 away from the first section 31, and the other end extends toward the first section 31 and partially extends into the first section 31.

[0106] like Figure 5 and Figure 6 As shown, along the third direction 003 , the surface of the conductive terminal 20 contacting the first insulating member 40 is spaced from the limiting portion 36 . Exemplarily, the spacing H3 between the surface of the conductive terminal 20 contacting the first insulating member 40 and the limiting portion 36 is 0.2 mm.

[0107] The projection of the limiting portion 36 on the conductive terminal 20 is located inside the conductive terminal 20. Based on the process of preparing the cover assembly 100 of the present application, the conductive terminal 20 will be displaced along the third direction 003 under the action of external force. It can be understood that the limiting portion 36 is provided on the outer surface of the conductive column 30 to limit the displacement of the conductive terminal 20 and prevent the displacement of the conductive terminal 20 from being too large to affect the sealing effect of the sealing ring 50.

[0108] In one embodiment, if Figure 8-Figure 10 As shown, the conductive column 30 of the present application also includes an identification hole 37, and two identification holes 37 are provided, and are arranged at intervals on the bottom surface of the inner hole 33 along the second direction 002. The setting of the identification hole 37 enables the external detection equipment to obtain the position of the welding connecting piece by identifying the position of the identification hole 37 in the subsequent process. It can be understood that the number, shape, size, and position of the identification hole 37 can be matched and set based on the actual use requirements of the battery 200 of the present application, and the present application does not impose any special restrictions on this.

[0109] In one embodiment, if Figure 2-Figure 4 As shown, the cover plate assembly 100 of the present application further includes an explosion-proof plate 70. The cover plate 10 is provided with a first air hole 12 spaced apart from the first positioning hole 11, and the second insulating member 60 is provided with a plurality of second air holes 62 spaced apart from the third positioning hole 61, and each second air hole 62 is connected to the first air hole 12. The explosion-proof plate 70 is fixed to the surface of the cover plate 10 away from the second insulating member 60, and shields the first air hole 12.

[0110] It is understandable that during the use of the battery 200, when the internal pressure of the battery is too high, the gas generated inside the battery can be transferred to the first air hole 12 through the second air hole 62, and break through the explosion-proof plate 70 to release the gas outward, thereby balancing the pressure difference inside and outside the battery 200. This further improves the safety performance of the battery 200 of the present application.

[0111] In one embodiment, if Figure 2-Figure 4As shown, the cover assembly 100 of the present application also includes a protective film 80, which covers the surface of the explosion-proof plate 70 away from the cover 10 to prevent external impurities from directly acting on the explosion-proof plate 70 and causing the explosion-proof plate 70 to fail, further improving the safety performance of the cover assembly 100 of the present application.

[0112] In one embodiment, if Figure 1-Figure 4 As shown, the cover plate assembly 100 of the present application further includes a lead-out sheet 90, on which a positioning groove 91 is provided, and the end of the conductive column 30 exposed from the second insulating member 60 is embedded in the positioning groove 91, and the lead-out sheet 90 is received in the housing 201 and electrically connected to the battery cell (not shown in the figure), so as to realize the charging and discharging function of the battery 200 of the present application.

[0113] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0114] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0115] It should be understood that the application of the present application is not limited to the above examples. For ordinary technicians in the field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application. Ordinary technicians in the field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of this utility model still fall within the scope covered by this utility model.

Claims

1. A conductive column electrically connected between a battery cell and a conductive terminal, characterized in that: The conductive column comprises a first section and a second section connected to each other, the first section is used to be electrically connected to the battery core, the second section is used to extend into the through hole of the conductive terminal, an end surface of the second section away from the first section is provided with an inner hole, and the second section is used to be folded in a direction away from the center of the inner hole and contact and conduct with the inner wall of the through hole; The through hole of the conductive terminal has a wall thickness along a first direction that is smaller than that along a second direction, the inner hole of the second section has a wall thickness along the first direction that is smaller than that along the second direction, and the first direction and the second direction are respectively perpendicular to the axial direction of the through hole.

2. The conductive column according to claim 1, characterized in that: A difference between a wall thickness of the inner hole of the second section along the second direction and a wall thickness of the inner hole of the second section along the first direction is greater than or equal to 0.3 mm.

3. The conductive column according to claim 1, characterized in that: The wall thickness of the inner hole along the first direction is greater than or equal to 0.5 mm and less than or equal to 2.5 mm.

4. The conductive column according to claim 1, characterized in that: The wall thickness of the inner hole gradually increases along the axial direction of the inner hole toward the battery core.

5. The conductive column according to claim 4, characterized in that: Along the axial direction of the inner hole, the cross-sectional shape of the inner hole is a trapezoid, and the angle between the hole wall of the inner hole and the end face of the second section away from the first section is greater than or equal to 95° and less than or equal to 130°; and / or, a chamfer is provided between the end face of the second section away from the first section and the outer surface of the second section.

6. The conductive column according to any one of claims 1 to 5, characterized in that: Along the axial direction of the inner hole, the depth of the inner hole is less than the thickness of the conductive column; and / or, The hole wall of the inner hole is provided with a protrusion protruding in a direction close to the center of the inner hole. Along the axial direction of the inner hole, one end of the protrusion is spaced apart from the end surface of the second section away from the first section, and the other end extends toward the bottom surface of the inner hole and contacts with the bottom surface of the inner hole.

7. The conductive column according to any one of claims 1 to 5, characterized in that: Along the axial direction of the inner hole, the depth of the inner hole is greater than or equal to 0.5 mm.

8. The conductive column according to any one of claims 1 to 5, characterized in that: The conductive column further includes two identification holes, and the two identification holes are arranged at intervals on the bottom surface of the inner hole along the second direction.

9. A cover plate assembly, characterized in that: It includes a cover plate, a conductive terminal, and a conductive column as described in any one of claims 1 to 8, wherein the cover plate is used to cooperate with an external shell to achieve sealing of a battery cell in the shell, the conductive terminal is fixed to a side of the cover plate away from the battery cell, the second section of the conductive column extends into the through hole of the conductive terminal and the second section is folded in a direction away from the center of the inner hole and electrically connected to the inner wall of the through hole.

10. The cover plate assembly according to claim 9, characterized in that: The cover assembly also includes a first insulating member, which is arranged on the surface of the cover facing the conductive terminal, and the conductive terminal is embedded in the surface of the first insulating member away from the cover, and the second section of the conductive column passes through the first insulating member and is folded along a direction away from the center of the inner hole and electrically connected to the inner wall of the through hole.

11. The cover plate assembly according to claim 10, characterized in that: A limiting portion is provided on the outer surface of the second section of the conductive column, the limiting portion protrudes in a direction away from the center of the inner hole, and along the axial direction of the inner hole, one end of the limiting portion is spaced from the end surface of the second section away from the first section, and the other end extends toward the first section and partially extends into the first section; Along the axial direction of the inner hole, a surface of the conductive terminal in contact with the first insulating member is spaced apart from the limiting portion.

12. The cover plate assembly according to claim 9, characterized in that: The inner wall of the through hole is provided with a protrusion protruding in a direction close to the center of the through hole. Along the axial direction of the through hole, one end of the protrusion is spaced apart from the end surface of the conductive terminal away from the cover plate, and the other end extends to the end surface of the conductive terminal close to the cover plate, and the outer surface of the conductive column is at least partially in contact with the protrusion.

13. The cover plate assembly according to claim 12, characterized in that: Along the axial direction of the through hole, the distance between the end surface of the conductive terminal away from the cover plate and the protrusion is greater than or equal to 0.5 mm and less than or equal to 1.4 mm; and / or, Along a direction approaching the center of the through hole, a protrusion height of the protrusion is greater than or equal to 0.1 mm and less than or equal to 0.6 mm.

14. The cover plate assembly according to claim 9, characterized in that: The cover assembly also includes a second insulating member, which is arranged on a side of the cover away from the conductive terminal. The first section of the conductive column passes through the cover and the second insulating member in sequence and is partially exposed on a surface of the second insulating member away from the cover.

15. The cover plate assembly according to claim 14, characterized in that: The cover plate assembly further comprises a sealing ring, which is sleeved on the outer edge of the conductive column and extends into the second insulating member along the axial portion of the through hole to shield the gap between the conductive column and the second insulating member.

16. The cover plate assembly according to claim 14, characterized in that: The cover plate assembly further includes a lead-out plate connected to an end portion of the conductive column exposed from the second insulating member, and the lead-out plate is used to be electrically connected to the battery cell.

17. A battery, characterized in that: It includes a shell, a battery cell, and a cover assembly as described in any one of claims 9-16, wherein the battery cell is accommodated in the shell, the cover assembly is connected to the opening of the shell to cooperate with the shell to seal the battery cell, and the first section of the conductive column of the cover assembly is electrically connected to the battery cell.

18. A battery device, characterized in that: It comprises a battery tray and the battery as claimed in claim 17, wherein the battery is accommodated in the battery tray.

19. An electrical equipment, characterized in that: Comprising the battery device as claimed in claim 18, or the battery as claimed in claim 17.

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