Copper-aluminum composite pole, top cover assembly and secondary battery

Abstract

The utility model discloses a copper-aluminum composite pole, a top cover assembly and a secondary battery, the copper-aluminum composite pole comprises an aluminum column, the bottom of the aluminum column is provided with a groove, the aluminum column extends outwards around the groove to form a first flange structure, and the side surface of the first flange structure is provided with a plurality of anti-rotation grooves distributed at intervals; the top of the copper plate is provided with a convex hull corresponding to the groove, the copper plate extends outwards around the convex hull to form a second flange structure, the convex hull and the groove are fixedly connected through brazing, and the first flange structure and the second flange structure are fixedly connected through brazing. The copper-aluminum composite pole provided by the embodiment of the utility model is formed by brazing the independent aluminum pole and the independent copper plate, and the thickness of the flange structure part can be effectively controlled, so that the manufacturing cost is reduced, and waste recovery is facilitated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of secondary batteries, and particularly relates to a copper-aluminum composite pole, a top cover assembly and a secondary battery. BACKGROUND

[0002] In the technical field of secondary batteries, the manufacturing of negative poles traditionally relies on a stamping forming process, in which a copper-aluminum composite plate is used as a raw material, and after stamping processing, a copper-aluminum composite pole is formed. Generally, the finished copper-aluminum composite pole is endowed with a flange structure, which enhances the connection stability and reliability of the pole through a specific design form.

[0003] Specifically, in the battery cover plate, the battery cover plate preparation method and the power battery disclosed in the Chinese patent application with the publication number CN118412595A, the specification

[0050] paragraph describes in detail a construction feature of the pole: "In one embodiment, the lower outer diameter of the pole is greater than the upper outer diameter of the pole to form a stepped end surface therebetween." This design makes the lower part of the pole form a protruding flange structure, which not only enhances the stability of the structure, but also facilitates reliable connection with other battery components.

[0004] However, although the design of the above-mentioned copper-aluminum composite pole exhibits certain advantages in production and application, the problems in its manufacturing process cannot be ignored. Since the stamping forming method is used to directly obtain the pole from the copper-aluminum composite plate, the thickness of the flange structure part is difficult to reduce, resulting in high manufacturing cost. Moreover, the manufacturing process often accompanies the generation of a large amount of waste. More complicatedly, the copper and aluminum components are mixed in these waste materials, which brings great challenges to the subsequent waste classification and recycling, not only increasing the recycling cost, but also possibly leading to a decrease in resource utilization efficiency due to material mixing.

[0005] In summary, the copper-aluminum composite pole in the prior art, although it meets the needs of the battery components in terms of function, still needs to be improved in terms of cost control and waste recycling. CONTENT OF THE UTILITY MODEL

[0006] One of the purposes of the present application is to provide a copper-aluminum composite pole, a top cover assembly and a secondary battery, in which the copper-aluminum composite pole is made by brazing an independent aluminum pole and an independent copper plate, and the thickness of the flange structure part can be effectively controlled, thereby reducing the manufacturing cost and facilitating waste recycling.

[0007] To achieve the above-mentioned application purposes, the technical solutions adopted by the present application are as follows:

[0008] The first aspect of the embodiment of the present application provides a copper-aluminum composite pole, comprising:

[0009] The aluminum column has a groove at the bottom, and the aluminum column extends outward around the groove with a first flange structure, and the side of the first flange structure is provided with a plurality of anti-rotation grooves distributed at intervals;

[0010] The copper plate has a convexity at the top corresponding to the groove, and the copper plate extends outward around the convexity with a second flange structure, and the convexity and the groove and the first flange structure and the second flange structure are fixedly connected through brazing.

[0011] Optionally, the outer diameter of the second flange structure is greater than the outer diameter of the first flange structure.

[0012] Optionally, the bottom surface of the copper plate is a plane.

[0013] The second aspect of the embodiment of the application provides a top cover assembly, which comprises the copper-aluminum composite pole provided in the first aspect and a top cover sheet, and the copper-aluminum composite pole is used to be installed on the top cover sheet.

[0014] The third aspect of the embodiment of the application provides a secondary battery, which comprises the copper-aluminum composite pole provided in the first aspect or the top cover assembly provided in the second aspect.

[0015] Compared with the prior art, the embodiment of the application has the following beneficial effects:

[0016] The copper-aluminum composite pole provided in the embodiment of the application adopts an independent aluminum column and an independent copper plate, and the copper-aluminum composite pole is made through brazing, which can not only reduce the difficulty of waste recovery and improve the resource utilization efficiency, but also can be manufactured independently, the thickness of the first flange structure of the aluminum column and the second flange structure of the copper plate can be better controlled, so that the total flange thickness can be effectively controlled to reduce the use of raw materials and reduce the manufacturing cost. At the same time, the anti-rotation grooves can be arranged on the side of the first flange structure to avoid the rotation of the copper-aluminum composite pole connected to other battery assemblies, improve the structural stability, and the anti-rotation grooves are not arranged on the copper plate, which can reduce the influence of the anti-rotation grooves on the battery performance. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The structure schematic diagram of the copper-aluminum composite pole provided in the embodiment of the application is shown;

[0019] Figure 2 The structure schematic diagram of the copper-aluminum composite pole provided in the embodiment of the application is shown;Figure 1 An exploded view of a copper-aluminum composite pole is shown;

[0020] Figure 3 An exploded view of a copper-aluminum composite pole is shown Figure 1 An exploded view of a copper-aluminum composite pole is shown.

[0021] Illustration:

[0022] 10, aluminum pole; 11, groove; 12, first flange structure; 121, anti-rotation groove; 20, copper plate; 21, convex bump; 22, second flange structure; 30, solder. DETAILED DESCRIPTION

[0023] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] In addition, the terms "first", "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0026] In order to illustrate the technical solutions described in the present application, the following will be described by specific embodiments.

[0027] Please refer to Figures 1 to 3 As shown, the embodiments of the present application provide a copper-aluminum composite pole, comprising: an aluminum pole 10 and a copper plate 20, the aluminum pole 10 and the copper plate 20 are fixedly connected by soldering through a solder 30.

[0028] Specifically, the bottom of the aluminum pole 10 has a groove 11, the aluminum pole 10 extends outwardly around the groove 11 with a first flange structure 12, the side surface of the first flange structure 12 is provided with a plurality of anti-rotation grooves 121 distributed at intervals. The top of the copper plate 20 has a convex bump 21 corresponding to the groove 11, the copper plate 20 extends outwardly around the convex bump 21 with a second flange structure 22, the convex bump 21 and the groove 11, and the first flange structure 12 and the second flange structure 22 are fixedly connected by soldering.

[0029] As an example, the outer diameter of the second flange structure 22 is greater than the outer diameter of the first flange structure 12.

[0030] As an example, the bottom surface of the copper plate 20 is a plane.

[0031] The copper-aluminum composite pole provided by the embodiments of the present application adopts the independent aluminum pole 10 and the independent copper plate 20, and the copper-aluminum composite pole is made by brazing. The copper-aluminum composite pole not only can reduce the difficulty of waste recovery and improve the resource utilization efficiency, but also can be manufactured independently. The thickness of the first flange structure 12 of the aluminum pole 10 and the thickness of the second flange structure 22 of the copper plate 20 can be better controlled, so that the total flange thickness can be effectively controlled to reduce the use of raw materials and reduce the manufacturing cost. At the same time, the anti-rotation groove 121 can be arranged on the side surface of the first flange structure 12 to avoid the rotation of the copper-aluminum composite pole after being connected to other battery components, improve the structural stability, and the anti-rotation groove 121 is not arranged on the copper plate 20, which can reduce the influence of the anti-rotation groove 121 on the battery performance.

[0032] In another embodiment of the present application, a top cover assembly is also provided, which includes the above-mentioned copper-aluminum composite pole and a top cover sheet, and the copper-aluminum composite pole is used to be installed on the top cover sheet. As an example, when the copper-aluminum composite pole is installed on the top cover sheet by using plastic, the anti-rotation groove 121 can be buckled with the plastic to avoid the rotation of the pole.

[0033] In another embodiment of the present application, a secondary battery is also provided, which includes the above-mentioned copper-aluminum composite pole or includes the above-mentioned top cover assembly. As an example, the secondary battery further includes an aluminum shell, and the top cover assembly and the aluminum shell are sealingly connected. As an example, the secondary battery is a lithium ion battery.

[0034] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, but not limit the same. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features. The modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A copper-aluminum composite electrode, characterized in that, include: An aluminum column, the bottom of which has a groove, and a first flange structure extending outward around the groove, the side of which has a plurality of spaced anti-rotation grooves. A copper plate, the top of which has a protrusion corresponding to the groove, and a second flange structure extending outward around the protrusion. The protrusion and the groove, as well as the first flange structure and the second flange structure, are fixedly connected by brazing.

2. The copper-aluminum composite electrode according to claim 1, characterized in that, The outer diameter of the second flange structure is larger than the outer diameter of the first flange structure.

3. The copper-aluminum composite electrode according to claim 1, characterized in that, The bottom surface of the copper plate is flat.

4. A top cover assembly, characterized in that, The invention includes the copper-aluminum composite electrode and top cover plate as described in any one of claims 1 to 3, wherein the copper-aluminum composite electrode is used to be mounted on the top cover plate.

5. A secondary battery, characterized in that, It includes the copper-aluminum composite pole as described in any one of claims 1 to 3 or the top cover assembly as described in claim 4.

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