Current collector disc and cylindrical battery

Abstract

The present disclosure relates to the field of new energy batteries, and specifically relates to a current collector disc and a cylindrical battery. Provided in the present disclosure is a current collector disc, comprising a first body, a second body, and an insulating connector, wherein the first body is configured to connect to a negative tab, and a first edge of the first body is provided with a plurality of first limiting structures; the second body is configured to connect to a positive tab arranged on the same side as the negative tab, and a first edge of the second body is provided with a plurality of second limiting structures; and the insulating connector is provided with a plurality of first connecting portions and a plurality of second connecting portions, the first connecting portions being connected to the first limiting structures in a limited manner, and the second connecting portions being connected to the second limiting structures in a limited manner. By providing the insulating connector for the first body and the second body, the first body and the second body are integrated as a whole, thereby reducing the overall assembly process of the current collector disk and the assembly process of the current collector disk with a wound core and a top cover structure, and achieving ease of positioning and mounting. Moreover, the insulating connector also avoids the risk of a short circuit caused by the overlapping between the first body and the second body.

Description

A current collector and cylindrical battery

[0001] Relevant publicly available cross-references

[0002] This disclosure claims priority to Chinese Patent Application No. 2024214266743, filed on June 20, 2024, entitled “A current collector and cylindrical battery”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of new energy batteries, and more specifically, to a current collector and a cylindrical battery. Background Technology

[0004] Cylindrical batteries with the same electrode side are a common type of battery, characterized by simple structure, large capacity, and high energy density, and are widely used in various fields. These batteries typically consist of a cylindrical metal casing, positive and negative electrodes, electrolyte, and separator; the positive and negative electrodes are located on the same side.

[0005] Among them, the current collector of the same-pole cylindrical battery is usually divided into two structural components: the positive current collector and the negative current collector. The positive current collector and the negative current collector are installed on the same plane. Since the positive current collector and the negative current collector are two separate structural components, there are many assembly steps. At the same time, there is a risk of short circuit when the positive and negative current collectors are connected. Summary of the Invention

[0006] The purpose of this disclosure is to provide a current collector and a cylindrical battery that reduces assembly steps, is easy to position and install, and avoids the risk of short circuit when the first and second bodies overlap.

[0007] The embodiments of this disclosure are implemented as follows:

[0008] In a first aspect, this disclosure proposes a current collector, comprising a first body, a second body, and an insulating connector; the first body is configured to connect to a negative electrode tab, and a first side of the first body is provided with a plurality of first limiting structures; the second body is configured to connect to a positive electrode tab disposed on the same side as the negative electrode tab, and a first side of the second body is provided with a plurality of second limiting structures; the insulating connector is provided with a plurality of first connecting portions and a plurality of second connecting portions, the first connecting portions being limitedly connected to the first limiting structures, and the second connecting portions being limitedly connected to the second limiting structures.

[0009] 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, and the other side is disposed along the first side of the first body. The first boss faces the top surface of the collector plate.

[0010] The first connecting part engages with and is snapped into the first boss, and the first connecting part is provided with a first protrusion that is opposite to and engages with the first through hole.

[0011] 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, and the other side is disposed along the first side of the second body. The second boss faces the top surface of the collector plate.

[0012] The second connecting part engages with and is snapped into the second protrusion, and the first connecting part is provided with a second protrusion that is opposite to and engages with the second through hole.

[0013] Optionally, the insulating connector is injection molded between the first body and the second body to make the insulating connector be respectively limited and connected to the first limiting structure and the second limiting structure;

[0014] The bottom of the insulating connector is flush with the bottom of the first body and the bottom of the second body.

[0015] Optionally, a first fold is formed by bending along the second side of the first body, the first fold facing the top surface of the collector plate, and the first fold is configured to connect with the housing.

[0016] Optionally, an insulating connection portion is provided along the second side of the second body, the insulating connection portion being configured to limit the second body to prevent the second body from contacting the housing.

[0017] Optionally, a plurality of third protrusions and third through holes are provided at intervals along the second side of the second body. The third protrusions face the top surface of the collector plate. One side of the third protrusion is adjacent to the third through hole, and the other side is provided along the second side of the second body.

[0018] The insulating connection part is limited to the third boss and the third through hole by injection molding. The insulating connection part is also provided with an injection molded boss, which faces the top surface of the housing and the collector plate and abuts against the housing.

[0019] Optionally, the first side of the second body is provided with a bendable bending structure, the bending structure protruding from the first side of the second body, the bending structure being configured to increase the welding area between the second body and the pole post;

[0020] The first body is provided with a first clearance groove, and the insulating connector is provided with a second clearance groove. The first clearance groove and the second clearance groove are arranged opposite to each other and configured to cooperate in avoiding the bending structure.

[0021] Optionally, the bending structure includes a welding disk and two spaced-apart bent edges. The first side of the second body is provided with a third clearance groove. One end of each of the two bent edges is connected to the edge of the welding disk, and the other end is connected to both sides of the third clearance groove. The second clearance groove and the third clearance groove form a clearance space configured to avoid the welding disk.

[0022] The bent edge is provided with 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 between the bent edge and the third clearance groove, and the second arc-shaped indentation is provided close to the welding disc.

[0023] Secondly, this disclosure also proposes a cylindrical battery, including the aforementioned current collector, core, housing, and top cover structure; the core is provided with the positive electrode tab and the negative electrode tab located on the same side; the core is housed within the housing; the top cover structure is connected to the housing, the bottom of the current collector is connected to the core, and the electrode post penetrates the top cover structure and is connected to the top of the current collector.

[0024] The beneficial effects of the embodiments disclosed herein are:

[0025] This manifold integrates the first and second bodies into a single unit by insulating them together, reducing the assembly steps of the manifold as a whole and the manifold with the core and top cover structure, and making it easier to position and install. At the same time, the insulating connector also avoids the risk of short circuit when the first and second bodies overlap. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 is a schematic diagram of the structure of the first body according to an embodiment of this disclosure;

[0028] Figure 2 is a partial schematic diagram of A in Figure 1;

[0029] Figure 3 is a schematic diagram of the structure of the second body according to an embodiment of this disclosure;

[0030] Figure 4 is a partial schematic diagram of B in Figure 3;

[0031] Figure 5 is a partial schematic diagram of C in Figure 3;

[0032] Figure 6 is a schematic diagram of the top surface of the collector disk in an embodiment of this disclosure.

[0033] Figure 7 is a partial schematic diagram of D in Figure 6;

[0034] Figure 8 is a schematic diagram of the bottom surface of the collector plate in an embodiment of this disclosure.

[0035] Icons: 010-Collector's plate; 100-First body; 110-First limiting structure; 111-First boss; 112-First through hole; 120-First folded edge; 130-First clearance groove; 200-Second body; 210-Second limiting structure; 211-Second boss; 212-Second through hole; 220-Insulating connection part; 221-Injection molded boss; 230-Third boss; 231-Third through hole; 240-Bending structure; 241-Welding disc; 242-Bending edge; 2421-First arc-shaped indentation; 2422-Second arc-shaped indentation; 243-Through groove structure; 250-Third clearance groove; 300-Insulating connector; 310-First connection part; 320-Second connection part; 330-Second clearance groove. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All alternative embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be optionally defined and explained in subsequent figures.

[0039] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the disclosed product is in use. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. In addition, the terms "first," "second," and "third," etc., are only configured to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0042] Research has revealed that the current collectors of cylindrical batteries on the same electrode side are typically divided into two structural components: a positive current collector and a negative current collector. Because the positive and negative current collectors are separate components, their assembly involves numerous steps, and there is a risk of short circuits due to overlap. Furthermore, since the positive and negative current collectors are mounted on the same plane, the installation space is limited and difficult to position, posing a risk of short circuits between the positive current collector and the casing. Additionally, the protruding solder marks on the bent electrode post occupy the height space of the cylindrical battery.

[0043] Therefore, this disclosure proposes a cylindrical battery that reduces the overall assembly process and is easy to position and install by using a current collector 010 that integrates the positive current collector and the negative current collector into a single structural component.

[0044] This disclosure proposes a cylindrical battery, including a current collector 010, a core (not shown), a housing (not shown), and a top cover structure (not shown); a positive electrode tab and a negative electrode tab are provided on the core on the same side; the core is housed in the housing; the top cover structure is connected to the housing, the bottom of the current collector 010 is connected to the core, and the electrode post penetrates the top cover structure and is connected to the top of the current collector 010.

[0045] Understandably, by adopting the integrated manifold 010, the overall assembly process is reduced, and it is easier to position and install.

[0046] In this embodiment, the cylindrical battery includes a winding core (not shown in the figure).

[0047] In this embodiment, the core includes a positive electrode foil, a negative electrode foil, and a separator. The positive electrode foil, the negative electrode foil, and the separator are wound on the same side, and after winding, the positive electrode tab and the negative electrode tab are located on the same side of the core.

[0048] The positive and negative electrodes are symmetrically distributed; the positive electrode is located in the left semicircle of the cylindrical battery, and the negative electrode is located in the right semicircle of the cylindrical battery. The positive and negative electrodes are separated from each other and do not overlap.

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

[0050] The housing has an internal cavity into which the winding core can be housed, with the tabs facing upwards. Then, the current collector 010 is placed on the winding core, with the first body 100 corresponding to the negative tab and the second body 200 corresponding to the positive tab.

[0051] In this embodiment, the cylindrical battery includes a top cover structure (not shown in the figure).

[0052] In this embodiment, the top cover structure includes a cover body and poles. The cover body is sealed to the housing. Part of the poles penetrates the cover body and is welded to the welding disk 241 of the folded structure of the second body 200. Another part of the poles penetrates the cover body and is welded to the first body 100.

[0053] In this embodiment, the cylindrical battery includes a current collector 010.

[0054] Referring to Figures 6 and 8, the current collector 010 disclosed herein includes a first body 100, a second body 200, and an insulating connector 300. The first body 100 is configured to connect to a negative electrode tab, and a plurality of first limiting structures 110 are provided on a first side of the first body 100. The second body 200 is configured to connect to a positive electrode tab disposed on the same side as the negative electrode tab, and a plurality of second limiting structures 210 are provided on a first side of the second body 200. The insulating connector 300 is provided with a plurality of first connecting portions 310 and a plurality of second connecting portions 320, wherein the first connecting portions 310 are limitedly connected to the first limiting structures 110, and the second connecting portions 320 are limitedly connected to the second limiting structures 210.

[0055] The negative and positive tabs are located on the same side of the winding core.

[0056] Understandably, by providing an insulating connector 300 to 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 010 and the current collector 010 with the core and top cover structure, and making it easier to position and install; at the same time, the insulating connector 300 also avoids the risk of short circuit between the positive current collector and the negative current collector in the prior art.

[0057] Please refer to Figures 1 and 2. In this embodiment, the collector disk 010 includes a first body 100.

[0058] The first body 100 is configured to connect to the negative electrode ear.

[0059] In this embodiment, please refer to FIG1. ​​The first body 100 is a fan-shaped structural component. The first side of the first body 100 is a straight side, the second side of the first body 100 is a rounded side, 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 configured to be connected to the negative electrode ear. The first side of the first body 100 is provided with a plurality of first limiting structures 110.

[0060] In this embodiment, the first body 100 is a semi-circular structural component. Of course, in an optional embodiment, the first body 100 can also be a fan-shaped structural component with an angular radius greater than 180° or less than 180°.

[0061] The first body 100 is made of copper.

[0062] Optionally, referring to Figures 1 and 2, the first limiting structure 110 includes a stamped first boss 111 and a first through hole 112; wherein, the first boss 111 faces and protrudes from the top surface of the 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 has a recessed stamping groove formed 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, and the stamping groove of the first boss 111 communicates with the first through hole 112.

[0063] Optionally, a first folded edge 120 is bent out in a semi-circular arc shape along the second side of the first body 100, with the first folded edge 120 facing the top surface of the collector plate 010, and the first folded edge 120 is configured to be laser connected to the housing.

[0064] Optionally, a semi-circular first clearance groove 130 is provided inward along the midpoint of the first side of the first body 100. The first clearance groove 130 and the second clearance groove 330 are respectively matched and configured to cooperate in avoiding the bending structure 240 on the second body 200.

[0065] Please refer to Figures 3-5. In this embodiment, the collector disk 010 includes a second body 200.

[0066] The second body 200 is configured to connect to the positive electrode tab.

[0067] In this embodiment, please refer to FIG3. The second body 200 is a fan-shaped structural component. The first side of the second body 200 is a straight side, and the second side of the second body 200 is a rounded side. The top surface of the second body 200 faces the top cover structure, and the bottom surface of the second body 200 faces the core and is configured to connect with the positive electrode tab. The first side of the second body 200 is provided with a plurality of second limiting structures 210.

[0068] The second body 200 is made of aluminum.

[0069] Optionally, referring to Figures 3 and 5, the second limiting structure 210 includes a stamped second boss 211 and a second through hole 212; wherein, the second boss 211 faces and protrudes from the top surface of the 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 has a recessed stamping groove formed on the bottom surface of the second body 200; wherein, 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, and the stamping groove of the second boss 211 communicates with the second through hole 212.

[0070] In an optional embodiment, referring to Figures 3 and 7, a bendable bending structure 240 is provided on the first side of the second body 200. It is understood that since the bending boss of existing positive electrode bending current collectors is usually a solid flat sheet, and bending requires equipment for positioning and guidance, providing a bendable bending structure 240 on the first side of the second body 200 increases the welding area between the second body 200 and the electrode post, reduces the waste of internal space in the cylindrical battery, and also reduces the amount of positive electrode material used in the second body 200.

[0071] Specifically, referring to Figure 3, a semi-circular third clearance groove 250 is provided inward from the midpoint of the first side of the second body 200. The third clearance groove 250 is configured to avoid the welding disk 241.

[0072] Specifically, referring to Figure 3, the bending structure 240 includes a welding disk 241 and two spaced-apart bent edges 242; wherein the welding disk 241 is composed of two semi-circular structural parts of different sizes; wherein one end of each of the two bent edges 242 is connected to the edge point of the welding disk 241, and the other end is connected to the two end points of the third clearance groove 250, and the two bent parts form a through groove structure 243 between the welding disk 241 and the second body 200.

[0073] Referring to Figure 3, the bent edge 242 has a first arc-shaped indentation 2421 facing the top surface of the second body 200 and a second arc-shaped indentation 2422 facing the bottom surface of the second body 200. The first arc-shaped indentation 2421 is located at the edge connection between the bent edge 242 and the third clearance groove 250; the second arc-shaped indentation 2422 is located near the welding disk 241. It can be understood that the bent edge 242 and the welding disk 241 are located on the top surface of the second body 200, as shown in Figure 7. The orientation of the first arc-shaped indentation 2421 and the second arc-shaped indentation 2422 is configured to facilitate bending and guide the bending direction, while also facilitating the bending and forming of the bent edge 242.

[0074] It is understandable that: 1. The welding disc 241 increases the welding area between the second body 200 and the electrode post; 2. Two spaced-apart bends are provided, and the two bends, the welding disc 241, and the second body 200 form a through groove structure 243, which reduces the amount of positive electrode material used in the second body 200; 3. When the two bends 242 are bent simultaneously, the second clearance groove 330 of the insulating connector 300 and the third clearance groove 250 of the second body 200 form a circular clearance space, which is configured to avoid the welding disc 241, reducing the waste of internal space in the cylindrical battery.

[0075] In an optional embodiment, referring to Figures 3, 4, and 7, an insulating connection portion 220 is provided along the second side of the second body 200. The insulating connection portion 220 is configured to limit the second body 200 to prevent it from contacting the housing. It is understood that, in the prior art, the positive current collector can only control its distance from the housing during welding assembly by positioning, and adhesive is required to ensure insulation between it and the housing. Therefore, providing an insulating connection portion 220 on the second side of the second body 200 can limit and insulate the second body 200 from contact with the housing, thereby preventing a short circuit caused by contact between the edge of the second body 200 and the housing.

[0076] Specifically, referring to Figures 3 and 4, multiple third protrusions 230 are spaced apart along the second side of the second body 200. The third protrusions 230 face the top surface of the collector plate 010. The third protrusions 230 are protrusion structures with a U-shaped cross-section. The third protrusions 230 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. One side of the third protrusion 230 is 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 protrusion 230 is connected to the third through hole 231.

[0077] Referring to Figure 7, the insulating connection part 220 is injection molded and is connected to the third boss 230 and the third through hole 231 by plastic injection molding. 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. The insulating connection part 220 is also provided with an injection molded boss 221, which faces the top surface of the housing and the collector plate 010 and abuts against the housing to avoid the edge of the second body 200 from contacting the housing and causing a short circuit.

[0078] Of course, in an optional embodiment, the insulating connection portion 220 may also be snapped into the top surface of the second connection hole in a snap-fit ​​manner, so that the insulating connection portion 220 and the second body 200 are locked in a limiting snap-fit.

[0079] In this embodiment, the second body 200, the welding disc 241, and the two bent edges 242 are integrally formed, and the insulating connection part 220 is connected to the second body 200 by plastic injection molding.

[0080] Referring to Figures 6 and 8, in this embodiment, the collector 010 includes an insulating connector 300.

[0081] Referring to Figure 8, the insulating connector 300 is provided with a plurality of first connecting parts 310 and a plurality of second connecting parts 320. The first connecting parts 310 are limited and connected to the first limiting structure 110, and the second connecting parts 320 are limited and connected to the second limiting structure 210.

[0082] In this embodiment, referring to Figures 6 and 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.

[0083] Specifically, the plastic is plastically fixed to the first connecting part 310 through the first through hole 112 and the stamping groove of the first boss 111, thereby enabling the first connecting part 310 of the insulating connector 300 to cooperate and engage with the first boss 111 and the first through hole 112 of the first limiting structure 110; the plastic is plastically fixed to the second connecting part 320 through the second through hole 212 and the stamping groove of the second boss 211, thereby enabling the second connecting part 320 of the insulating connector 300 to cooperate and engage 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 injection-molded insulating connector 300 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.

[0084] The insulating connector 300 is injection molded with a second clearance groove 330. The first clearance groove 130 and the second clearance groove 330 are arranged opposite to each other. The second clearance groove 330 is configured to cooperate with the welding disc 241 of the bending structure 240 to avoid the bending structure 240.

[0085] Of course, in an optional embodiment, the insulating connector 300 can be a snap-fit ​​type, that is, elastic snap-fit ​​members are provided on both the first connecting portion 310 and the second connecting portion 320. The elastic snap-fit ​​member of the first connecting portion 310 passes through the second through hole 212 to realize the engagement and snap-fit ​​between the insulating connector 300 and the first body 100; the elastic snap-fit ​​member of the second connecting portion 320 passes through the second through hole 212 to realize the engagement and snap-fit ​​between the insulating connector 300 and the second body 200, so that the insulating connector 300 is limited and snap-fitted with the first body 100 and the second body 200.

[0086] The insulating connector 300 is made of plastic, and materials such as polyethylene, polypropylene, ABS, PA, and polystyrene can be selected.

[0087] The manufacturing process and technology of the manifold 010 proposed in this embodiment are as follows: First, the first body 100 and the second body 200 are connected by a plastic injection molded insulating connector 300 to integrate the first body 100, the second body 200 and the insulating connector 300 into a single structural component. At the same time, an insulating connection portion 220 is formed on the outer edge of the second side of the second body 200.

[0088] The second step is to install the collector plate 010 into the housing, connect the bottom surface of the first body 100 to the negative electrode tab, and laser weld the first folded edge 120 of the first body 100 to the inner wall of the housing; connect the bottom surface of the second body 200 to the positive electrode tab, abut the insulating connection part 220 to the inner wall of the housing, and weld the top surface of the welding disc 241 of the second body 200 to the electrode post.

[0089] In summary, the current collector 010 and cylindrical battery proposed in this disclosure integrate the first body 100 and the second body 200 into a whole by providing an insulating connector 300, which reduces the assembly process of the current collector 010 as a whole and the current collector 010 with the winding core and top cover structure, and makes it easier to position and install; at the same time, the insulating connector 300 also avoids the risk of short circuit when the first body 100 and the second body 200 overlap.

[0090] The above are merely preferred embodiments of this disclosure and are not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure. Industrial applicability

[0091] The current collector and cylindrical battery disclosed herein integrate the first body and the second body into a whole, reducing the assembly process of the current collector as a whole and the current collector, the core and the top cover structure, and making it easy to position and install; at the same time, it also avoids the risk of short circuit when the first body and the second body overlap.

Claims

1. A collector disk, characterized in that, include: A first body, configured to connect to a negative electrode tab, and a first side of the first body is provided with a plurality of first limiting structures; The second body is configured to connect to the positive electrode ear located on the same side as the negative electrode ear, and the first side of the second body is provided with a plurality of second limiting structures; An insulating connector is provided with a plurality of first connecting parts and a plurality of second connecting parts, wherein the first connecting parts are limited to the first limiting structure and the second connecting parts are limited to the second limiting structure.

2. The collector disk 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 adjacent to the first through hole, and the other side is along the first side of the first body. The first boss faces the top surface of the collector plate. The first connecting part engages with and snaps into the first boss and the first through hole.

3. The collector disk according to claim 1 or 2, characterized in that, 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, and the other side is along the first side of the second body. The second boss faces the top surface of the collector plate. The second connecting part engages with and snaps into the second boss and the second through hole.

4. The collector disk according to any one of claims 1 to 3, characterized in that, The insulating connector is injection molded between the first body and the second body so that the insulating connector is respectively limited and 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 collector disk according to any one of claims 1 to 4, characterized in that, A first fold is formed by bending along the second side of the first body, the first fold facing the top surface of the collector plate, and the first fold is configured to connect with the housing.

6. The collector disk according to any one of claims 1 to 5, characterized in that, An insulating connection portion is provided along the second side of the second body, and the insulating connection portion is configured to limit the second body to prevent the second body from contacting the housing.

7. The collector disk according to claim 6, characterized in that, Multiple third protrusions and third through holes are provided at intervals along the second side of the second body. The third protrusions face the top surface of the collector plate. One side of the third protrusion is adjacent to the third through hole, and the other side is provided along the second side of the second body.

8. The collector disk according to claim 7, characterized in that, The insulating connection part is limited to the third boss and the third through hole by injection molding. The insulating connection part is also provided with an injection molded boss, which faces the top surface of the housing and the collector plate and abuts against the housing.

9. The collector disk according to any one of claims 1 to 8, characterized in that, The first side of the second body is provided with a bendable bending structure, the bending structure protruding from the first side of the second body, the bending structure being configured to increase the welding area between the second body and the pole post.

10. The collector disk according to claim 9, characterized in that, The first body is provided with a first clearance groove, and the insulating connector is provided with a second clearance groove. The first clearance groove and the second clearance groove are arranged opposite to each other and configured to cooperate in avoiding the bending structure.

11. The collector disk according to claim 10, characterized in that, The bending structure includes a welding disc and two spaced-apart bent edges. A third clearance groove is provided on the first side of the second body. One end of each of the two bent edges is connected to the edge of the welding disc, and the other end is connected to both sides of the third clearance groove. The second clearance groove and the third clearance groove form a clearance space configured to avoid the welding disc.

12. The collector disk according to claim 11, characterized in that, The bent edge is provided with 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 between the bent edge and the third clearance groove, and the second arc-shaped indentation is provided close to the welding disc.

13. A cylindrical battery, characterized in that, include: The collector disk according to any one of claims 1-12; A winding core, wherein the positive electrode tab and the negative electrode tab are disposed on the same side; A housing, wherein the winding core is housed within the housing; A top cover structure is connected to the housing, the bottom of the collector plate is connected to the winding core, and the pole post passes through the top cover structure and is connected to the top of the collector plate.

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