Collecting plate and battery

Abstract

The utility model discloses a collector plate and a battery, the collector plate comprises a body part, the body part is provided with a through hole, the axis of the body part is provided with a through central hole, and the through hole is arranged at the outer side of the central hole; the protruding part is arranged on one surface of the body part in a protruding mode, and the protruding part is located on the circumferential edge of the through hole. The battery comprises a battery cell, tab parts and a collector plate, the tab parts are arranged at the two axial ends of the battery cell, the surfaces, back on to the battery cell, of the tab parts are welded to a body part of the collector plate, through holes are formed in the axes of the tab parts, and the through holes correspond to a center hole; tabs are convexly arranged on the tab parts opposite to the battery cell, correspond to the convex parts, penetrate through the through holes and are welded with the convex parts in an attached manner. According to the invention, the effective welding area of the collector plate and the tab can be increased, so that the overcurrent capability of the battery is improved, and the internal resistance of the battery is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a current collecting disc and a battery. BACKGROUND

[0002] With the continuous increase of the size and capacity of cylindrical batteries, the traditional tab lead-out method cannot meet the overcurrent demand of large cylindrical batteries. Currently, to meet the overcurrent capacity of the battery cell and improve the rate performance of the cylindrical battery, the battery cell of the cylindrical battery is designed with full tab rubbing. Specifically, after the battery cell is manufactured, the positive and negative tabs at both ends of the battery cell are rubbed, then the positive and negative current collecting discs are respectively welded to the tabs at both ends of the battery cell, and finally the battery cell is packaged into a shell to form a battery. For example, the patent with publication number CN114361555A discloses a full tab rubbing method for cylindrical batteries, which is to mix the originally upright tabs to make each tab contact to the maximum extent to play a better current collecting role, and the full tabs are directly led out of the battery, which can effectively reduce the internal resistance of the battery, and the full tabs are rubbed in the same plane, which facilitates the subsequent welding of the current collecting disc and ensures the current conducting effect.

[0003] However, the prior art generally uses laser intermittent spot welding and / or laser continuous line welding when rubbing the full tabs and welding the current collecting disc, which makes the effective welding area between the current collecting disc and the tabs small, resulting in poor overcurrent capacity of the battery and high internal resistance of the battery. CONTENT OF THE UTILITY MODEL

[0004] To solve the above-mentioned defects in the prior art, the purpose of the present application is to provide a current collecting disc and a battery to increase the effective welding area between the current collecting disc and the tabs, thereby improving the overcurrent capacity of the battery and reducing the internal resistance of the battery.

[0005] The first aspect of the present application provides a current collecting disc, comprising:

[0006] A body part, the body part is provided with a through hole, and the axis of the body part is provided with a through center hole, and the through hole is located outside the center hole;

[0007] A protruding part, the protruding part is protruding on one surface of the body part, and the protruding part is located at the circumferential edge of the through hole.

[0008] As a preferred embodiment, in the first aspect of the present application, the body part comprises an inner part and an outer part arranged coaxially, the outer part surrounds the circumferential side of the inner part, and the through hole is formed between the outer part and the inner part, and the protruding part is arranged at the circumferential edge of the inner part.

[0009] As a preferred embodiment, in the first aspect of the present application, the protruding part is obtained by stamping and folding or stamping and cutting and folding the body part, and forms the inner part, the outer part and the through hole.

[0010] As a preferred embodiment, in the first aspect of the present application, two protrusions are provided, and the two protrusions are provided on the same surface of the body portion, and both of the two protrusions are located on the circumferential edge of the through hole.

[0011] As a preferred embodiment, in the first aspect of the present application, both of the two protrusions are located on the radially inner arc edge of the through hole, and the two protrusions are radially symmetrically arranged.

[0012] As a preferred embodiment, in the first aspect of the present application, the two protrusions are arranged at intervals, and a gap is arranged between the two protrusions, and the gap is integrated with the through hole in communication.

[0013] As a preferred embodiment, in the first aspect of the present application, the central angle corresponding to the gap is 30°-60°, and the central angle corresponding to the protrusion is 75°-105°.

[0014] As a preferred embodiment, in the first aspect of the present application, the circumferential edge of the body portion is provided with a connecting piece, and the connecting piece can be bent away from the surface of the body portion, so that the protrusion is located between the connecting piece and the body portion.

[0015] As a preferred embodiment, in the first aspect of the present application, the central angle corresponding to the inner region is 360°, and the central angle corresponding to the outer region is 210°-240°, so as to form an opening on the circumferential side of the inner region, and the connecting piece is arranged at the opening and connected with the inner region and the outer region.

[0016] The second aspect of the present application provides a battery, comprising: a battery cell, a tab portion and the above-mentioned current collector plate, the tab portion is arranged at the axial both ends of the battery cell, and the surface of the tab portion away from the battery cell is welded with the body portion of the current collector plate, the axial center of the tab portion is provided with a through hole, and the through hole and the center hole are correspondingly arranged;

[0017] The tab portion protrudes away from the battery cell and is provided with a tab, the tab is correspondingly arranged with the protrusion, and the tab passes through the through hole and is welded in close contact with the protrusion.

[0018] As a preferred embodiment, in the second aspect of the present application, the tab is bent to form an “n” type structure, and the tab is in close contact with the opposite two surfaces of the protrusion.

[0019] As a preferred embodiment, in the second aspect of the present application, the body portion and the tab portion are connected by spot welding or wire welding, and the tab and the protrusion are connected by contact welding.

[0020] As a preferred embodiment, in the second aspect of the present application, two tabs are provided, the number of the protrusions is equal to the number of the tabs and one-to-one corresponding, and both of the two tabs pass through the through hole and are welded in close contact with the corresponding two protrusions.

[0021] As a preferred embodiment, in the second aspect of the application, the two tabs are spaced apart and radially symmetrical.

[0022] The current collector plate and the battery provided by the application have the following technical effects:

[0023] The body part of the current collector plate is provided with a through hole, and the circumferential edge of the through hole is provided with a protruding part relative to one surface of the body part. When the current collector plate is applied to the battery, the current collector plate is arranged on the side of the tab part away from the battery cell. The body part of the current collector plate is welded to the tab part. The tab can pass through the through hole to be welded to the protruding part. In this way, based on the welding of the body part and the tab part of the current collector plate in the prior art, the application utilizes the welding of the tab and the protruding part to greatly increase the effective welding area of the current collector plate and the tab, thereby improving the overcurrent capacity of the battery and reducing the internal resistance of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the battery of the application;

[0025] Figure 2 It is a top view of the battery of the application;

[0026] Figure 3 It is a front view of the battery of the application;

[0027] Figure 4 It is an exploded view of the battery of the application;

[0028] Figure 5 It is a top view of the current collector of the application;

[0029] Figure 6 It is a process flow diagram of the welding of the tab and the protruding part of the application;

[0030] Figure 7 It is a structural schematic diagram of the welding of the tab part and the current collector plate of the application.

[0031] Reference signs:

[0032] 1, current collector plate; 11, body part; 111, inner zone; 112, outer zone; 113, center hole; 12, through hole; 13, protruding part; 14, notch; 15, connecting piece; 2, battery cell; 3, tab part; 31, tab; 311, tab unit; 32, through hole. DETAILED DESCRIPTION

[0033] In order to better understand and implement, the technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application.

[0034] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0036] Embodiment 1

[0037] Referring to Figure 4 and Figure 5 , the present embodiment provides a current collecting plate, which comprises a body part 11 and a protruding part 13. The body part 11 is provided with a through hole 12, which is arranged outside the axis of the body part 11. The protruding part 13 is protruding from one surface of the body part 11, and is located at the circumferential edge of the through hole 12.

[0038] The present embodiment takes a circular current collecting plate as an example for illustration, of course, in actual application, the current collecting plate can also be square or other shapes, only need to make adaptive adjustment to the structure. The current collecting plate is applied to a cylindrical battery, therefore, the main body of the current collecting plate, i.e. the body part 11, is circular structure, the body part 11 is arranged corresponding to the tab end of the battery cell 2, the body part 11 has two opposite surfaces, one surface of the body part 11 is used for the protruding part 13 to protrude and extend, and the other surface of the body part 11 is used for facing the tab end of the battery cell 2, so as to facilitate the welding connection with the tab end. The through hole 12 penetrates through the two opposite surfaces of the body part 11, so as to facilitate the tab 31 of the tab end to pass through the through hole 12. The protruding part 13 is located at the circumferential edge of the through hole 12, so that after the tab 31 passes through the through hole 12, the side surface of the tab 31 can be closely fitted with the side surface of the protruding part 13, so as to facilitate the butt welding between the tab 31 and the protruding part 13.

[0039] It should be noted that the through hole 12 can be arc-shaped structure, square structure, triangular structure, irregular structure, etc., the circumferential edge thereof includes any position of the entire outer periphery of the through hole 12, so as to facilitate the tab 31 to pass through the through hole 12. Figure 5 Taking the arc-shaped structure of the through hole 12 as an example, the circumferential edge can be the outer arc circle, the inner arc circle or the radial edge connecting the outer arc circle and the inner arc circle of the through hole 12, and the protruding part 13 can be arranged at any position of the outer arc circle, the inner arc circle or the radial edge, as long as the position corresponds to the position of the tab 31, so as to facilitate the butt welding between the tab 31 and the protruding part 13.

[0040] Therefore, the body part 11 of the current collecting disc 1 is provided with the through hole 12, and the circumferential edge of the through hole 12 is provided with the protruding part 13 relative to a surface of the body part 11. When the current collecting disc 1 is applied to the cylindrical battery, the current collecting disc 1 is arranged corresponding to the side where the tab end is away from the battery cell 2, and the body part 11 of the current collecting disc 1 is welded and connected corresponding to the tab end, and the tab 31 can pass through the through hole 12 to be welded and connected with the protruding part 13. In this way, the welding between the tab end and the body part 11 can be realized, and the welding between the tab 31 and the protruding part 13 is increased, so that the effective welding area between the current collecting disc 1 and the tab end can be greatly improved, so as to improve the overcurrent capacity of the cylindrical battery, and the internal resistance of the cylindrical battery can be reduced.

[0041] It should be noted that the axial center of the current collecting disc 1 is provided with a through central hole 113, and the through hole 12 and the protruding part 13 are arranged at a distance from the central hole 113, that is, the through hole 12 is not arranged at the central hole 113, and there is a distance between the circumferential edge of the through hole 12 and the central hole 113, so that the protruding part 13 is not arranged at the edge of the central hole 113, so as to avoid the winding needle in the central hole 113 for winding the battery cell 2, and facilitate liquid injection, exhaust and the like.

[0042] Specifically, the body part 11 includes an inner part 111 and an outer part 112 arranged coaxially, the outer part 112 surrounds the circumferential side of the inner part 111, and the through hole 12 is formed between the outer part 112 and the inner part 111, and the protruding part 13 is arranged at the circumferential edge of the inner part 111. The central hole 113 is arranged at the axial center of the inner part 111.

[0043] The inner part 111 and the outer part 112 are connected by a connecting part, and except for the connecting part, the through hole 12 is arranged between the inner part 111 and the outer part 112, so as to reduce the mass of the current collecting disc 1 on the basis of ensuring the integrity of the current collecting disc 1. In theory, the circumferential edge of the through hole 12, that is, the outer arc, the inner arc and the radial edge, can be provided with the protruding part 13, but considering the reliability of the connection between the current collecting disc 1 and the tab end and the efficiency of current transmission, the protruding part 13 is arranged at the circumferential edge of the inner part 111, that is, the protruding part 13 is arranged at the radial inner arc edge of the through hole 12.

[0044] The protruding portion 13 is punched and folded or punched and cut and folded relative to the body portion 11, and forms the inner region 111, the outer region 112 and the through hole 12. A suitable position of the body portion 11 of the current collector plate 1 is punched by a punching device, and then the punched region is adaptively cut, and then folded relative to a surface of the body portion 11, so that the protruding portion 13 is formed protruding on a surface of the body portion 11, and the through hole 12 is formed at the punched position, and the body portion 11 is separated into the inner region 111 and the outer region 112 through the through hole 12. On the one hand, the punching and cutting forming process is simple and convenient to operate; on the other hand, the protruding portion 13 is an integral structure with the body portion 11, which is beneficial to improve the overcurrent capacity of the battery.

[0045] Generally, the protruding portion 13 can be provided with one or multiple. In the embodiment, the protruding portion 13 is provided with two, and the two protruding portions 13 protrude on the same surface of the body portion 11, and both of the two protruding portions 13 are located at the circumferential edge of the through hole 12.

[0046] The protruding portion 13 is punched and cut and folded twice, and both of the two protruding portions 13 are located at the circumferential edge of the inner region 111, and the arc of the two protruding portions 13 is relatively small, and it is not easy to overlap and wrinkle due to the arc structure when being folded, so as to ensure the flatness of the side surface of the protruding portion 13, which is beneficial to the flatness and firmness of the welding between the protruding portion 13 and the tab 31. Moreover, the number of the two protruding portions 13 is relatively small, which can greatly reduce the difficulty of punching and cutting, so as to effectively reduce the cost.

[0047] Both of the two protruding portions 13 are located at the radial inner arc circle edge of the through hole 12, and the two protruding portions 13 are radially symmetrically arranged. The radially symmetric arrangement of the two protruding portions 13 is beneficial to improve the stability of the connection between the current collector plate 1 and the tab end after the welding between the protruding portion 13 and the tab 31.

[0048] The two protruding portions 13 are arranged at intervals, and a gap 14 is arranged between the two protruding portions 13, and the gap 14 is an integral structure communicated with the through hole 12. The two protruding portions 13 are arranged at intervals on the basis of the radial symmetry, which is beneficial to further reduce the arc of the protruding portion 13, so as to further improve the flatness of the side surface of the protruding portion 13, thereby improving the flatness and firmness of the welding between the protruding portion 13 and the tab 31.

[0049] In theory, the two protruding portions 13 can be obtained by punching and cutting and folding twice, but this will obviously increase the complexity of the forming process and increase the cost. Therefore, the embodiment obtains the continuous through hole 12 by punching once, and the punched region is correspondingly cut and folded into two protruding portions 13 arranged at intervals and radially symmetrically, so as to form a cut gap 14 between the two protruding portions 13, and the gap 14 is an integral structure communicated with the through hole 12, which can greatly simplify the forming process and reduce the cost.

[0050] The central angle of the notch 14 is 30°-60°, and the central angle of the convex part 13 is 75°-105°. The central angle of the notch 14 and the central angle of the convex part 13 are matched to ensure that the two radially symmetrical convex parts 13 have a small arc, so as to avoid more wrinkles when the multi-layer tab 31 is bent and welded with the corresponding convex part 13, thereby avoiding the increase of the stacking thickness and ensuring the welding strength of the tab 31 and the convex part 13.

[0051] In addition to the other surface of the current collector plate 1 being welded with the tab end, the current collector plate 1 is also fixedly connected with the pole of the battery cover plate. To this end, in combination with Figure 7 The circumferential edge of the body part 11 is provided with a connecting piece 15, which can be bent away from one surface of the body part 11 to make the convex part 13 located between the connecting piece 15 and the body part 11.

[0052] The connecting piece 15 is arranged at the circumferential edge of the body part 11, which can be bent to be "z" type or directly folded to be welded with the pole, so as to realize the electrical connection between the battery cell 2 and the pole. The connecting piece 15 is located above the convex part 13 after being bent, so as to separate the convex part 13 from the battery cover plate by using the connecting piece 15, so as to avoid affecting the structural stability of the convex part 13.

[0053] Specifically, the central angle of the inner region 111 is 360°, and the central angle of the outer region 112 is 210°-240°, so as to form an opening at the circumferential side of the inner region 111, and the connecting piece 15 is arranged at the opening and connected with the inner region 111 and the outer region 112. The outer region 112 is arranged in a circular arc shape, so as to leave an opening for the installation of the connecting piece 15, so that the connecting piece 15 extends outward from the edge of the inner region 111. In this way, when the connecting piece 15 is bent to be "z" type or directly folded, the connecting piece 15 can be stably located between the body part 11 and the pole, so as to improve the firmness of the welding between the connecting piece 15 and the pole. At the same time, the central angle of 210°-240° can ensure that the outer region 112 has a large enough area for welding, so as to facilitate the improvement of the overcurrent capacity of the cylindrical battery and the reduction of the internal resistance of the cylindrical battery.

[0054] Embodiment 2

[0055] Referring to Figures 1-3 The embodiment provides a cylindrical battery, which comprises a battery cell 2, a tab part 3 and the current collector plate 1 of embodiment 1. The tab part 3 is arranged at the axial two end parts of the battery cell 2, and one surface of the tab part 3 away from the battery cell 2 is welded with the body part 11 of the current collector plate 1. The tab part 3 is provided with a tab 31 protruding away from the battery cell 2, the tab 31 is arranged corresponding to the convex part 13, and the tab 31 passes through the through hole 12 and is welded with the convex part 13.

[0056] The axial two ends of the battery cell 2 are positive and negative, respectively, and are provided with positive and negative tab portions, respectively, which are connected to a current collector plate 1. In this embodiment, the positive and negative tab portions correspond to the same structure of the current collector plate 1, and thus are not distinguished as positive and negative, and are collectively referred to as tab portions 3.

[0057] In assembling the cylindrical battery, the battery cell 2 and the tab portions 3 at the axial two ends of the battery cell 2 are formed by winding, and the axial center of the battery cell 2 and the axial center of the tab portions 3 are provided with a channel and a through hole 32 for placing a winding needle, and can be used for liquid injection, exhaust, etc. The channel, the through hole 32 and the central hole 113 of the current collector plate 1 are correspondingly arranged and located on the same axis. The end surface of the tab portion 3 facing away from the battery cell 2 is welded to the body portion 11, and the tab 31 can pass through the through hole 12 so that the side surface of the tab 31 is in contact with the corresponding side surface of the protruding portion 13 for welding, thereby realizing the welding of the tab portion 3 and the current collector plate 1. After the above assembly is assembled into a shell, the connecting piece 15 of the current collector plate 1 is bent to weld the pole of the battery cover plate, and then the battery cover plate is packaged at the end of the shell, thereby completing the assembly of the cylindrical battery, and the pole and the battery cell 2 can be electrically connected through the current collector plate 1.

[0058] Thus, in the cylindrical battery of this embodiment, not only the end surface of the tab portion 3 is welded to the body portion 11, but also the tab 31 is in contact with the protruding portion 13 for welding, which greatly improves the effective welding area of the current collector plate 1 and the tab portion 3, thereby improving the overcurrent capacity of the cylindrical battery and reducing the internal resistance of the cylindrical battery. Moreover, when the connecting piece 15 is bent and welded to the pole, the welding of the protruding portion 13 and the tab 31 can be avoided, thereby facilitating the firmness of the welding of the protruding portion 13 and the tab 31.

[0059] In this embodiment, referring to Figure 7 , the body portion 11 and the tab portion 3 are spot-welded or line-welded, and the tab 31 and the protruding portion 13 are contact-welded. The body portion 11 and the tab portion 3 can be welded by spot-welding or line-welding in the prior art, thereby realizing the electrical connection of the body portion 11 and the tab portion 3. The tab 31 and the protruding portion 13 are in contact with each other, and are contact-welded, so that the corresponding side surfaces of the tab 31 and the protruding portion 13 are integrally welded, which not only improves the welding area, the firmness of the connection between the two, the overcurrent capacity and the internal resistance, but also the contact welding between the tab 31 and the protruding portion 13 does not affect the body portion 11 and the tab portion 3, thereby avoiding the situation of false welding or welding through, which is conducive to improving the welding efficiency and the yield.

[0060] Generally, the tab 31 can be in contact with one side surface of the protruding portion 13, but in this embodiment, in combination with Figure 6 , the tab 31 is bent to form an "n" type structure, and the tab 31 is in contact with the opposite two surfaces of the protruding portion 13.

[0061] The tab 31 includes at least two tab units 311, and the plurality of tab units 311 are die-cut and overlapped and compacted to form the tab 31. The tab 31 penetrates the through hole 12 and is attached to one side of the protrusion 13, and then is bent to be attached to the other side of the protrusion 13. In this way, the tab 31 is semi-enclosed and attached to the side of the protrusion 13. After the tab 31 is welded to the protrusion 13, the connection between the tab 31 and the protrusion 13 is improved.

[0062] Each tab 31 includes at least two tab units 311, which helps to reduce the number of tabs 31 and protrusions 13, reduce the molding cost, and increase the thickness of the connection between the tab 31 and the protrusion 13, thereby improving the flow capacity.

[0063] The tab 31 is provided with two, and the number of protrusions 13 is equal to the number of tabs 31 and one-to-one corresponding. Both of the two tabs 31 penetrate the through hole 12 and are attached and welded to the corresponding two protrusions 13.

[0064] The protrusion 13 is punched, cut and folded into two, and both of the two protrusions 13 are located on the circumferential edge of the inner area 111. The curvature of the two protrusions 13 is relatively small, and it is not easy to overlap and wrinkle due to the arc structure when folding, so as to ensure the flatness of the side of the protrusion 13. The tab 31 is provided corresponding to the protrusion 13, and accordingly, the curvature of the tab 31 is relatively small. After the tab 31 penetrates the through hole 12, the tab 31 is attached to the side of the protrusion 13 and is not easy to overlap and wrinkle when being bent, which helps to improve the flatness and firmness of the welding between the protrusion 13 and the tab 31. Moreover, the number of the two protrusions 13 is relatively small, which can greatly reduce the difficulty of punching and cutting, thereby effectively reducing the cost. The number of the two tabs 31 is relatively small, which helps to reduce the die-cutting and compacting cost and simplify the process.

[0065] Further, the two tabs 31 are spaced apart and radially symmetrical. Correspondingly, the two protrusions 13 are spaced apart and radially symmetrical. On the basis of the radial symmetry of the two protrusions 13 and the two tabs 31, the curvature of the protrusion 13 and the tab 31 is further reduced, so as to further improve the flatness of the side of the protrusion 13 and the tab 31, thereby improving the flatness and firmness of the welding between the protrusion 13 and the tab 31.

[0066] The technical means disclosed in the application scheme is not limited to the technical means disclosed in the above embodiments, but also includes the technical solutions composed of any combination of the above technical features. It should be noted that for ordinary skilled persons in the art, without departing from the principles of the application, some improvements and refinements can be made, which are also considered within the protection scope of the application.

Claims

1. A collector disk, characterized in that, include: The body part (11) has a through hole (12) and a through central hole (113) is provided on the axis of the body part (11). The through hole (12) is located outside the central hole (113). A protrusion (13) is provided on a surface of the body part (11) and the protrusion (13) is located at the circumferential edge of the through hole (12).

2. The collector disk according to claim 1, characterized in that: The body part (11) includes an inner region (111) and an outer region (112) arranged coaxially. The outer region (112) surrounds the periphery of the inner region (111), and the through hole (12) is formed between the outer region (112) and the inner region (111). The protrusion (13) is provided on the circumferential edge of the inner region (111).

3. The collector disk according to claim 2, characterized in that: The protrusion (13) is obtained by stamping and folding or stamping and cutting the body part (11) to form the inner area (111), the outer area (112) and the through hole (12).

4. The collector disk according to any one of claims 1-3, characterized in that: The protrusion (13) is provided in two parts, and the two protrusions (13) are provided on the same surface of the body part (11), and both protrusions (13) are located at the circumferential edge of the through hole (12).

5. The collector disk according to claim 4, characterized in that: Both protrusions (13) are located at the radial inner arc edge of the through hole (12), and the two protrusions (13) are arranged radially symmetrically.

6. The collector disk according to claim 5, characterized in that: The two protrusions (13) are spaced apart, and a notch (14) is provided between the two protrusions (13). The notch (14) and the through hole (12) are connected to form an integral structure.

7. The collector disk according to claim 6, characterized in that: The central angle of the notch (14) is 30°-60°, and the central angle of the protrusion (13) is 75°-105°.

8. The collector disk according to claim 2 or 3, characterized in that: The circumferential edge of the body part (11) is provided with a connecting piece (15), which can be bent away from the body part (11) relative to a surface of the body part (11) so that the protrusion (13) is located between the connecting piece (15) and the body part (11).

9. The collector disk according to claim 8, characterized in that: The inner area (111) has a center angle of 360° and the outer area (112) has a center angle of 210°-240°, so as to form an opening on the periphery of the inner area (111). The connecting piece (15) is provided at the opening and is connected to the inner area (111) and the outer area (112).

10. A battery, characterized in that, include: The battery cell (2), the tab (3), and the current collector (1) according to any one of claims 1-9, wherein the tab (3) is provided at both ends of the axial direction of the battery cell (2), and the surface of the tab (3) facing away from the battery cell (2) is welded to the body part (11) of the current collector (1), and a through hole (32) is provided at the axial center of the tab (3), and the through hole (32) and the center hole (113) are correspondingly provided; The tab (3) has a tab (31) protruding from the battery cell (2). The tab (31) is provided corresponding to the protrusion (13). The tab (31) passes through the through hole (12) and is welded to the protrusion (13).

11. The battery according to claim 10, characterized in that: The tab (31) is bent to form an "n" shaped structure, and the tab (31) is attached to the two opposite surfaces of the protrusion (13).

12. A battery according to claim 10, characterized in that: The main body (11) and the tab (3) are connected by spot welding or wire welding, and the tab (31) and the protrusion (13) are connected by contact welding.

13. The battery according to any one of claims 10-12, characterized in that: The electrode tabs (31) are provided in two. The number of protrusions (13) is equal to the number of electrode tabs (31) and their positions correspond one-to-one. Both electrode tabs (31) pass through the through hole (12) and are welded to the corresponding two protrusions (13).

14. The battery according to claim 12, characterized in that: The two electrodes (31) are spaced apart and are radially symmetrical.

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