Collecting plate and cylindrical battery

Abstract

The utility model relates to a collector plate and a cylindrical battery, and relates to the field of new energy batteries. The utility model provides a collector plate, which comprises a first body, a second body and an insulating connecting piece, the first body is used for connecting a negative tab, and a plurality of first limiting structures are arranged on a first edge of the first body; the second body is used for connecting a positive tab arranged on the same side as the negative tab, and a plurality of second limiting structures are arranged on the first edge of the second body; a plurality of first connecting parts and a plurality of second connecting parts are arranged on the insulating connecting piece, the first connecting parts are in limiting connection with the first limiting structures, and the second connecting parts are in limiting connection with the second limiting structures. The first body and the second body are integrated into a whole by arranging the insulating connecting pieces on the first body and the second body, so that the assembly procedures of the whole collector plate and the assembly procedures of the collector plate, the roll core and the top cover structure are reduced, and positioning and mounting are easy; meanwhile, the insulating connecting piece also avoids the risk of lap joint short circuit of the first body and the second body.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and more specifically, to a current collector plate and a cylindrical battery. Background Art

[0002] The existing same-pole side cylindrical battery is a common type of battery, which has the characteristics of simple structure, large capacity, high energy density, etc., and is widely used in various fields. This kind of battery usually consists of a cylindrical metal shell, positive and negative electrodes, electrolyte, diaphragm and other parts; among them, the positive and negative electrodes are both located on the same side.

[0003] After research by the inventor, it is found that the current collector plate of the same-pole side cylindrical battery is usually divided into two structural parts, the positive current collector plate and the negative current collector plate; among them, the positive current collector plate and the negative current collector plate are installed on the same plane. Since the positive current collector plate and the negative current collector plate are two separate structural parts respectively, the assembly process between them is more, and there is a risk of lap short circuit between the positive and negative current collector plates. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a current collector plate and a cylindrical battery, which can reduce the assembly process, are easy to position and install; and also avoid the risk of lap short circuit between the first body and the second body.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a current collector plate, which includes a first body, a second body and an insulating connecting piece; the first body is used for connecting the negative electrode tab, and a plurality of first limiting structures are arranged on the first side of the first body; the second body is used for connecting the positive electrode tab arranged on the same side as the negative electrode tab, and a plurality of second limiting structures are arranged on the first side of the second body; a plurality of first connecting parts and a plurality of second connecting parts are arranged on the insulating connecting piece, the first connecting part is in limiting connection with the first limiting structure, and the second connecting part is in limiting connection with the second limiting structure.

[0007] Optionally, the first limiting structure includes a first boss and a first through hole, one side of the first boss is adjacent to the first through hole, the other side is arranged along the first side of the first body, and the first boss faces the top surface of the current collector plate;

[0008] The first connecting part cooperates with and is clamped with the first boss, and a first protrusion is arranged on the first connecting part and is arranged opposite to and cooperates with the first through hole for clamping.

[0009] Optionally, the second limiting structure includes a second boss and a second through hole, one side of the second boss is adjacent to the second through hole, the other side is arranged along the first side of the second body, and the second boss faces the top surface of the current collector plate;

[0010] The second connecting portion is fitted and clamped with the second boss, and a second protrusion is provided on the first connecting portion, which is disposed opposite to and cooperates with the second through hole for clamping connection.

[0011] Optionally, the insulating connector is injection-molded between the first body and the second body, so that the insulating connector is respectively and limit-connected to the first limiting structure and the second limiting structure;

[0012] The bottom of the insulating connector is flush with the bottom of the first body and the bottom of the second body.

[0013] Optionally, a first folded edge is bent along the second side of the first body, the first folded edge faces the top surface of the current collector plate, and the first folded edge is used for connection with the housing.

[0014] Optionally, an insulating connection portion is provided along the second side of the second body, and the insulating connection portion is used for limiting the second body to prevent the second body from contacting the housing.

[0015] Optionally, a plurality of third bosses and third through holes are arranged at intervals along the second side of the second body, the third bosses face the top surface of the current collector plate, one side of the third boss is adjacent to the third through hole, and the other side is arranged along the second side of the second body;

[0016] The insulating connection portion is injection-molded and limit-connected to the third boss and the third through hole, and an injection-molded boss is further provided on the insulating connection portion, and the injection-molded boss faces the top surfaces of the housing and the current collector plate and abuts against the housing.

[0017] Optionally, a bendable bending structure is provided on the first side of the second body, the bending structure protrudes from the first side of the second body, and the bending structure is used for increasing the welding area between the second body and the pole column;

[0018] The first body is provided with a first avoidance groove, and the insulating connector is provided with a second avoidance groove, and the first avoidance groove and the second avoidance groove are disposed opposite to each other and are used for cooperatively avoiding the bending structure.

[0019] Optionally, the bending structure includes a welding disc and two spaced bending edges, a third avoidance groove is provided on the first side of the second body, one ends of the two bending edges are respectively connected to the edge of the welding disc, and the other ends are respectively connected to two sides of the third avoidance groove, and the second avoidance groove and the third avoidance groove form an avoidance space for avoiding the welding disc;

[0020] On the bent edge, there are a first arc-shaped indentation facing the top surface of the second body and a second arc-shaped indentation facing the bottom surface of the second body. The first arc-shaped indentation is provided at the edge connection of the bent edge and the third avoidance groove, and the second arc-shaped indentation is disposed near the welding disc.

[0021] In a second aspect, the present utility model further provides a cylindrical battery, including the current collector plate, the wound core, the housing, and the top cover structure as described above; the positive electrode tab and the negative electrode tab are disposed on the same side of the wound core; the wound core is accommodated in the housing; the top cover structure is connected to the housing, the bottom of the current collector plate is connected to the wound core, and the pole post penetrates through the top cover structure and is connected to the top of the current collector plate.

[0022] The beneficial effects of the embodiments of the present utility model are:

[0023] By providing an insulating connection member between the first body and the second body, this current collector plate integrates the first body and the second body into a whole, reducing the overall assembly process of the current collector plate as well as the assembly processes between the current collector plate and the wound core and the top cover structure, and facilitating positioning and installation; at the same time, the insulating connection member also avoids the risk of short circuit due to the overlap of the first body and the second body. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 Structural schematic diagram of the first body of the embodiment of the present utility model;

[0026] Figure 2 For Figure 1 Partial schematic diagram of A in

[0027] Figure 3 Structural schematic diagram of the second body of the embodiment of the present utility model;

[0028] Figure 4 For Figure 3 Partial schematic diagram of B in

[0029] Figure 5 For Figure 3 Partial schematic diagram of C in

[0030] Figure 6 Structural schematic diagram of the current collector plate of the embodiment of the present utility model with the top surface facing up;

[0031] Figure 7 is Figure 6 a partial schematic view of D in

[0032] Figure 8 a schematic view of the bottom surface of the current collecting tray of the embodiment of the present utility model facing upwards.

[0033] Icons: 010 - current collecting tray; 100 - first body; 110 - first limiting structure; 111 - first boss; 112 - first through hole; 120 - first folding edge; 130 - first avoiding groove; 200 - second body; 210 - second limiting structure; 211 - second boss; 212 - second through hole; 220 - insulating connection part; 221 - injection molding boss; 230 - third boss; 231 - third through hole; 240 - bending structure; 241 - welding disc; 242 - bending edge; 2421 - first arc indentation; 2422 - second arc indentation; 243 - through groove structure; 250 - third avoiding groove; 300 - insulating connector; 310 - first connection part; 320 - second connection part; 330 - second avoiding groove. Detailed Embodiments

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0036] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, 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 should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0038] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0040] Through research by the inventor, it is found that the current collectors of cylindrical batteries on the same-pole side are usually divided into two structural parts, the positive current collector and the negative current collector. Among them, since the positive current collector and the negative current collector are two separate structural parts respectively, there are more assembly processes for the two, and there is a risk of lap short circuit between the positive and negative current collectors. Among them, the positive current collector and the negative current collector are installed on the same plane, and the installation space for the two is small and not easy to position, and there is also a risk of lap short circuit between the positive current collector and the housing. At the same time, the raised welding mark of the pole column with a bent structure occupies the height space of the cylindrical battery.

[0041] Therefore, the present utility model proposes a cylindrical battery. By adopting a current collector 010 that integrates the positive current collector and the negative current collector into one structural part, the overall assembly process is reduced, and it is easy to position and install.

[0042] The present utility model proposes a cylindrical battery, which includes a current collector 010, a wound core (not shown in the figure), a housing (not shown in the figure), and a top cover structure (not shown in the figure); a positive electrode tab and a negative electrode tab are arranged on the wound core on the same side; the wound core is accommodated in the housing; the top cover structure is connected to the housing, the bottom of the current collector 010 is connected to the wound core, and the pole column penetrates through the top cover structure and is connected to the top of the current collector 010.

[0043] It is understandable that by adopting the current collector plate 010 integrated as a whole, the overall assembly process is reduced, and it is easy to position and install.

[0044] In this embodiment, the cylindrical battery includes a wound core (not shown in the figure).

[0045] In this embodiment, the wound core includes a positive electrode foil, a negative electrode foil, and a separator. The positive electrode foil is wound together with the negative electrode foil and the separator on the same side. After winding, the positive electrode tab and the negative electrode tab are located on the same side of the wound core.

[0046] Among them, the positive electrode tab and the negative electrode tab are symmetrically distributed; the positive electrode tab is located within the left semi-circle of the cylindrical battery, and the negative electrode tab is located within the right semi-circle of the cylindrical battery. The positive electrode tab and the negative electrode tab are separated from each other and do not overlap or contact.

[0047] In this embodiment, the cylindrical battery includes a housing (not shown in the figure).

[0048] Among them, a cavity is provided inside the housing, and the wound core can be accommodated in the cavity of the housing with the tabs facing upward; then the current collector plate 010 is arranged on the wound core, and the first body 100 is arranged corresponding to the negative electrode tab, and the second body 200 is arranged corresponding to the positive electrode tab.

[0049] In this embodiment, the cylindrical battery includes a top cover structure (not shown in the figure).

[0050] In this embodiment, the top cover structure includes a cover body and pole columns. The cover body is hermetically connected to the housing, and part of the pole columns penetrate through the cover body and are welded to the welding disc 241 of the folding structure of the second body 200, and the other part of the pole columns penetrate through the cover body and are welded to the first body 100.

[0051] In this embodiment, the cylindrical battery includes a current collector plate 010.

[0052] Please refer to Figure 6 and Figure 8 , a current collector plate 010 proposed by the present utility model includes a first body 100, a second body 200, and an insulating connector 300; the first body 100 is used to connect the negative electrode tab, and a plurality of first limiting structures 110 are provided on the first side of the first body 100; the second body 200 is used to connect the positive electrode tab arranged on the same side as the negative electrode tab, and a plurality of second limiting structures 210 are provided on the first side of the second body 200; a plurality of first connection parts 310 and a plurality of second connection parts 320 are provided on the insulating connector 300, the first connection parts 310 are in limiting connection with the first limiting structures 110, and the second connection parts 320 are in limiting connection with the second limiting structures 210.

[0053] Among them, the negative electrode tab and the positive electrode tab are arranged on the same side of the wound core.

[0054] It is understandable that by arranging the insulating connecting member 300 between the first body 100 and the second body 200, the first body 100 and the second body 200 are integrated into a whole, reducing the assembly process of the current collector plate 010 and the assembly process between the current collector plate 010 and the core and the top cover structure, and being easy to position and install. At the same time, the insulating connecting member 300 also avoids the risk of short circuit caused by the overlap of the existing positive current collector plate and the negative current collector plate.

[0055] Please refer to Figure 1 and Figure 2 , in this embodiment, the current collector plate 010 includes a first body 100.

[0056] Among them, the first body 100 is used to connect the negative electrode tab.

[0057] In this embodiment, please refer to Figure 1 , the first body 100 is a fan-shaped structural member. The first side of the first body 100 is a straight edge, the second side of the first body 100 is an arc edge, the top surface of the first body 100 faces the top cover structure, and the bottom surface of the first body 100 faces the core and is used to connect with the negative electrode tab. Among them, a plurality of first limiting structures 110 are provided on the first side of the first body 100.

[0058] In this embodiment, the first body 100 is a semi-circular structural member. Of course, in other embodiments, the first body 100 can also be a fan-shaped structural member with an angular radian greater than 180° or less than 180°.

[0059] Among them, the material of the first body 100 is copper.

[0060] Optionally, please refer to Figure 1 and Figure 2 , the first limiting structure 110 includes a first boss 111 and a first through hole 112 formed by stamping. Among them, the first boss 111 faces and protrudes from the top surface of the current collector plate 010. The first boss 111 is a boss structure with a U-shaped cross-section. The first boss 111 protrudes from the top surface of the first body 100 and forms a recessed stamping groove on the bottom surface of the first body 100. One side of the first boss 111 is adjacent to the first through hole 112, and the other side is arranged along the first side of the first body 100. The stamping groove of the first boss 111 is communicated with the first through hole 112.

[0061] Optionally, a first folded edge 120 bent into a half-circle arc shape is formed along the second side of the first body 100. The first folded edge 120 faces the top surface of the current collector plate 010, and the first folded edge 120 is used for laser connection with the housing.

[0062] Optionally, a semi-circular first avoidance groove 130 is provided inwardly from the midpoint of the first side of the first body 100. The first avoidance groove 130 is arranged in relative cooperation with the second avoidance groove 330 and is used to cooperate in avoiding the bending structure 240 on the second body 200.

[0063] Please refer to Figures 3 - 5 , in this embodiment, the current collector plate 010 includes a second body 200.

[0064] Among them, the second body 200 is used to connect the positive electrode tab.

[0065] In this embodiment, please refer to Figure 3 , the second body 200 is a fan-shaped structural member. The first side of the second body 200 is a straight edge, the second side of the second body 200 is an arc edge, the top surface of the second body 200 faces the top cover structure, and the bottom surface of the second body 200 faces the winding core and is used to connect with the positive electrode tab; among them, a plurality of second limiting structures 210 are provided on the first side of the second body 200.

[0066] Among them, the material of the second body 200 is aluminum.

[0067] Optionally, please refer to Figure 3 and Figure 5 , the second limiting structure 210 includes a second boss 211 and a second through hole 212 formed by stamping; among them, the second boss 211 faces and protrudes from the top surface of the current collector plate 010. The second boss 211 is a boss structure with a U-shaped cross-section. The second boss 211 protrudes from the top surface of the second body 200 and forms a recessed stamping groove on the bottom surface of the second body 200; among them, one side of the second boss 211 is adjacent to the second through hole 212, and the other side is arranged along the first side of the second body 200. The stamping groove of the second boss 211 communicates with the second through hole 212.

[0068] In an alternative embodiment, please refer to Figure 3 and Figure 7 , a bendable bending structure 240 is provided on the first side of the second body 200. Since the bending boss of the existing positive electrode bent current collector plate is usually a solid flat piece, and the bending needs to be positioned and guided by equipment. Therefore, a bendable bending structure 240 is provided on the first side of the second body 200, which increases the welding area between the second body 200 and the pole column, reduces the waste of the internal space of the cylindrical battery, and also reduces the amount of positive electrode material of the second body 200.

[0069] Specifically, please refer to Figure 3 , a semi-circular third avoidance groove 250 is provided inwardly from the midpoint of the first side of the second body 200. The third avoidance groove 250 is used to avoid the welding disc 241.

[0070] Specifically, please refer toFigure 3 The bending structure 240 includes a welding disc 241 and two bending edges 242 arranged at intervals; wherein, the welding disc 241 is composed of two semi-circular structural members of different sizes; wherein, one ends of the two bending edges 242 are respectively connected to the edge points of the welding disc 241, and the other ends are respectively connected to the two end points of the third avoidance groove 250, and a through groove structure 243 is formed between the two bending parts, the welding disc 241 and the second body 200.

[0071] Wherein, please refer to Figure 3 On the bending edge 242, there is a first arc-shaped indentation 2421 arranged towards the top surface of the second body 200 and a second arc-shaped indentation 2422 arranged towards the bottom surface of the second body 200; the first arc-shaped indentation 2421 is arranged at the edge connection of the bending edge 242 and the third avoidance groove 250; the second arc-shaped indentation 2422 is arranged close to the welding disc 241. Since the orientations of the first arc-shaped indentation 2421 and the second arc-shaped indentation 2422 are used for bending guidance and also facilitate bending and forming; so that the bent bending edge 242 and the welding disc 241 are located on the top surface of the second body 200, please refer to Figure 7 .

[0072] It can be understood that: 1. The welding disc 241 increases the welding area between the second body 200 and the pole; 2. Two bending parts are arranged at intervals, and a through groove structure 243 is formed between the two bending parts, the welding disc 241 and the second body 200, reducing the amount of positive electrode material used in the second body 200; 3. When the two bending edges 242 are bent simultaneously, a circular avoidance space is formed by the second avoidance groove 330 of the insulating connector 300 and the third avoidance groove 250 of the second body 200, and this avoidance space is used to avoid the welding disc 241, reducing the waste of the internal space of the cylindrical battery.

[0073] In an alternative embodiment, please refer to Figure 3 , Figure 4 and Figure 7 , an insulating connection part 220 is arranged along the second side of the second body 200, and the insulating connection part 220 is used to limit the second body 200 to prevent the second body 200 from contacting the housing. Since in the prior art, the positive current collector plate can only control the distance from the housing through positioning during welding assembly and needs to be glued to ensure insulation from the housing. Therefore, an insulating connection part 220 is arranged on the second side of the second body 200 to limit and insulate the second body 200 from the housing, preventing the edge of the second body 200 from contacting the housing and causing a short circuit.

[0074] Specifically, please refer to Figure 3 and Figure 4, a plurality of third bosses 230 are arranged at intervals along the second side of the second body 200. The third bosses 230 face the top surface of the current collector plate 010. The third bosses 230 are boss structures with a U-shaped cross-section. The third bosses 230 protrude from the top surface of the second body 200 and form a recessed stamping groove on the bottom surface of the second body 200; one side of the third boss 230 is arranged adjacent to the third through hole 231, and the other side is arranged along the second side of the second body 200. The stamping groove of the third boss 230 communicates with the third through hole 231.

[0075] Among them, please refer to Figure 7 , the insulating connection part 220 is formed by injection molding. The insulating connection part 220 is limitedly connected to the third boss 230 and the third through hole 231 by plastic injection. The top surface of the insulating connection part 220 is flush with the top surface of the third boss 230, and the bottom surface of the insulating connection part 220 is flush with the bottom surface of the second body 200; an injection molding boss 221 is also provided on the insulating connection part 220. The injection molding boss 221 faces the top surfaces of the housing and the current collector plate 010 and abuts against the housing to prevent the edge of the second body 200 from contacting the housing and causing a short circuit.

[0076] Of course, in other embodiments, the insulating connection part 220 can also be clamped with the top surface of the second connection hole in a clamping manner, so that the insulating connection part 220 is limitedly clamped with the second body 200.

[0077] In this embodiment, the second body 200, the welding disc 241 and the two bent edges 242 are of an integrally formed structure, and the insulating connection part 220 is connected to the second body 200 by plastic injection later.

[0078] Please refer to Figure 6 and Figure 8 , in this embodiment, the current collector plate 010 includes an insulating connector 300.

[0079] Among them, please refer to Figure 8 , a plurality of first connection parts 310 and a plurality of second connection parts 320 are provided on the insulating connector 300. The first connection part 310 is limitedly connected to the first limiting structure 110, and the second connection part 320 is limitedly connected to the second limiting structure 210.

[0080] In this embodiment, please refer to Figure 6 and Figure 8, the insulating connector 300 is formed by plastic injection molding; that is, the insulating connector 300 is formed by plastic injection molding between the first body 100 and the second body 200. Wherein, the plastic is plastically fixed with the stamping groove of the first boss 111 through the first through hole 112 to form the first connecting portion 310, so that the first connecting portion 310 of the insulating connector 300 cooperates and is clamped with the first boss 111 and the first through hole 112 of the first limiting structure 110; the plastic is plastically fixed with the stamping groove of the second boss 211 through the second through hole 212 to form the second connecting portion 320, so that the second connecting portion 320 of the insulating connector 300 cooperates and is clamped with the second boss 211 and the second through hole 212 of the second limiting structure 210; at the same time, the bottom of the insulating connector 300 after injection molding is flush with the bottom of the first body 100 and the bottom of the second body 200, and the bottom of the insulating connector is flush with the top of the first boss 111 and the top of the second boss 211.

[0081] Wherein, the insulating connector 300 is injection molded with a second avoidance groove 330, the first avoidance groove 130 and the second avoidance groove 330 are arranged opposite to each other, and the second avoidance groove 330 is used to cooperate and avoid the welding disc 241 of the bending structure 240.

[0082] Of course, in other embodiments, the insulating connector 300 can be connected by a clamping method, that is, elastic clamping members are arranged on both the first connecting portion 310 and the second connecting portion 320. The elastic clamping member of the first connecting portion 310 passes through the second through hole 212 to realize the cooperation and clamping of the insulating connector 300 and the first body 100; the elastic clamping member of the second connecting portion 320 passes through the second through hole 212 to realize the cooperation and clamping of the insulating connector 300 and the second body 200, so that the insulating connector 300 is clamped and limited with the first body 100 and the second body 200.

[0083] Wherein, the material of the insulating connector 300 is plastic, specifically, it can be materials such as polyethylene, polypropylene, ABS, PA, polystyrene, etc.

[0084] The working principle of the current collector plate 010 proposed in this embodiment is: the insulating connector 300 is formed by plastic injection molding between the first body 100 and the second body 200, so as to integrate the first body 100, the second body 200 and the insulating connector 300 into a structural member. At the same time, an insulating connection portion 220 is formed on the outer edge of the second side of the second body 200.

[0085] The current collector plate 010 is integrally installed in the housing. The bottom surface of the first body 100 is connected to the negative electrode tab, and the first folded edge 120 of the first body 100 is laser welded to the inner wall of the housing. The bottom surface of the second body 200 is connected to the positive electrode tab, the insulating connection part 220 is abutted against the inner wall of the housing, and the top surface of the welding disc 241 of the second body 200 is welded to the pole column.

[0086] In summary, for the current collector plate 010 and the cylindrical battery proposed by the present utility model, by providing the insulating connection member 300 between the first body 100 and the second body 200, the first body 100 and the second body 200 are integrated into a whole, reducing the assembly processes of the current collector plate 010 as a whole and between the current collector plate 010, the wound core and the top cover structure, and being easy to position and install. At the same time, the insulating connection member 300 also avoids the risk of overlap short circuit between the first body 100 and the second body 200.

[0087] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A collecting plate, characterized in that: include: A first body, the first body is used to connect the negative electrode ear, and a first side of the first body is provided with a plurality of first limiting structures; A second body, the second body is used to connect the positive electrode ear arranged on the same side as the negative electrode ear, and a first side of the second body is provided with a plurality of second limiting structures; An insulating connector, wherein a plurality of first connecting parts and a plurality of second connecting parts are provided on the insulating connector, wherein the first connecting part is connected to the first limiting structure in a limiting manner, and the second connecting part is connected to the second limiting structure in a limiting manner.

2. The collecting plate according to claim 1, characterized in that: The first limiting structure includes a first boss and a first through hole, one side of the first boss is arranged adjacent to the first through hole, and the other side is arranged along the first side of the first body, and the first boss faces the top surface of the collecting plate; The first connecting portion cooperates with and is clamped with the first boss and the first through hole.

3. The collecting plate according to claim 1, characterized in that: The second limiting structure includes a second boss and a second through hole, one side of the second boss is arranged adjacent to the second through hole, the other side is arranged along the first side of the second body, and the second boss faces the top surface of the collecting plate; The second connecting portion cooperates with and is clamped with the second boss and the second through hole.

4. The collecting plate according to claim 1, characterized in that: The insulating connector is injection molded between the first body and the second body, so that the insulating connector is respectively connected to the first limiting structure and the second limiting structure; The bottom of the insulating connector is flush with the bottom of the first body and the bottom of the second body.

5. The collecting plate according to claim 1, characterized in that: A first folded edge is bent along the second side of the first body, the first folded edge faces the top surface of the collecting plate, and the first folded edge is used to be connected to the shell.

6. The collecting plate according to claim 1, characterized in that: An insulating connecting portion is provided along the second side of the second body, and the insulating connecting portion is used to limit the second body to prevent the second body from contacting the shell.

7. The collecting plate according to claim 6, characterized in that: A plurality of third bosses and third through holes are arranged at intervals along the second side of the second body, the third bosses face the top surface of the current collecting plate, one side of the third bosses is arranged adjacent to the third through holes, and the other side is arranged along the second side of the second body; The insulating connection part is positionally connected with the third boss and the third through hole by injection molding, and an injection molding boss is also provided on the insulating connection part, and the injection molding boss faces the top surfaces of the shell and the collecting plate and abuts against the shell.

8. The collecting plate according to claim 1, characterized in that: A bendable bending structure is provided on the first side of the second body, the bending structure protrudes from the first side of the second body, and the bending structure is used to increase the welding area between the second body and the pole; The first body is provided with a first avoidance groove, and the insulating connector is provided with a second avoidance groove. The first avoidance groove and the second avoidance groove are arranged opposite to each other and are used to cooperate in avoiding the bending structure.

9. The collecting plate according to claim 8, characterized in that: The bending structure includes a welding disk and two bending edges arranged at intervals, a first side of the second body is provided with a third avoidance groove, one end of the two bending edges is respectively connected to the edge of the welding disk, and the other end is respectively connected to the two sides of the third avoidance groove, and the second avoidance groove and the third avoidance groove form an avoidance space for avoiding the welding disk; The bending edge is provided with a first arcuate indentation arranged toward the top surface of the second body and a second arcuate indentation arranged toward the bottom surface of the second body. The first arcuate indentation is arranged at the connection between the bending edge and the edge of the third avoidance groove, and the second arcuate indentation is arranged close to the welding disk.

10. A cylindrical battery, characterized in that: include: The collecting plate according to any one of claims 1 to 9; A winding core, on which the positive electrode tab and the negative electrode tab located on the same side are arranged; a shell, wherein the winding core is accommodated in the shell; A top cover structure is connected to the shell, the bottom of the current collecting disc is connected to the winding core, and the pole passes through the top cover structure and is connected to the top of the current collecting disc.

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