Copper-aluminum composite negative pole with welded structure

Abstract

The utility model relates to copper aluminium composite negative pole technical field, concretely is a copper aluminium composite negative pole of welded structure, this copper aluminium composite negative pole includes copper column body, the copper column body includes bottom plate, one side of bottom plate is provided with locating block, the inside of locating block is provided with welding groove, this welding groove penetrates locating block, aluminium column body, aluminium column body is fixed on copper column body through the friction stir welding, and aluminium column body includes top plate, one side of top plate towards copper column body is provided with welding post, the welding post includes welding boss no.

Description

Technical Field

[0001] This utility model relates to the technical field of copper-aluminum composite negative electrode posts, specifically a welded copper-aluminum composite negative electrode post. Background Technology

[0002] With the rapid development of the new energy industry, various types of batteries are increasingly widely used in electric vehicles, energy storage systems, and consumer electronics. These applications place increasingly higher demands on battery performance, such as high energy density, long lifespan, and good charge / discharge efficiency. As a key component connecting the battery's internal and external circuits, the performance and structure of the battery terminals directly affect the overall battery performance.

[0003] The existing copper-aluminum composite negative electrode structure is relatively complex and the design is not very reasonable. Furthermore, the copper-aluminum composite negative electrode is fixed by laser welding. Although laser welding has the advantages of high efficiency and low risk of breakage, copper and aluminum are high reflectivity metals, which makes laser welding difficult to apply. Utility Model Content

[0004] The purpose of this utility model is to provide a welded copper-aluminum composite negative electrode post, which has the advantages of simple structure, reasonable design, stable structure after welding, and high structural strength, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a welded copper-aluminum composite negative electrode post, comprising: a copper column, the copper column including a base plate, a positioning block provided on one side of the base plate, and a welding groove provided inside the positioning block, the welding groove penetrating the positioning block;

[0006] An aluminum column is fixed to a copper column by friction stir welding. The aluminum column includes a top plate, and a welding column is provided on the side of the top plate facing the copper column. The welding column includes a first welding boss, and a second welding boss is provided on the side of the first welding boss facing the copper column.

[0007] Preferably, the outer edge of the base plate is provided with four positioning grooves in a ring array around its axis at equal intervals, and each positioning groove is configured as C-shaped.

[0008] Preferably, the welding groove includes an interlocking groove, the inner edge of which is provided with a first welding step, a second welding step is provided below the first welding step, and a third welding step is provided below the second welding step.

[0009] Preferably, the connection points of welding step one, welding step two, and welding step three are all provided with arc-shaped friction grooves, wherein the diameter of welding step one is greater than the diameter of welding step two, and the diameter of welding step two is greater than the diameter of welding step three.

[0010] Preferably, the top plate has a threaded groove on the side away from the copper column, the welding column includes a welding boss one, the welding boss one and a welding boss two on the side facing the copper column, and a positioning post is provided on the side of the welding boss two away from the welding boss one.

[0011] Preferably, both the first welding boss and the second welding boss have an arc-shaped friction welding surface on their outer edges, and the diameter of the first welding boss is greater than the diameter of the second welding boss.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model provides a welded copper-aluminum composite negative electrode post, which includes a copper column and an aluminum column. The overall structure is simple and reasonably designed. The welding column is embedded in the welding groove inside the positioning block and fixed by friction stir welding. This improves the structural stability and strength.

[0014] 2. In this utility model, the welding groove includes an interlocking groove. The inner edge of the interlocking groove is provided with a welding step one, a welding step two is provided below the welding step one, and a welding step three is provided below the welding step two. The welding column includes a welding boss one. The welding boss one and the side facing the copper column are constructed with a welding boss two. A positioning post is provided on the side of the welding boss two away from the welding boss one. The welding boss two is embedded in the welding step three, the welding boss one is embedded in the welding step two, and finally the top plate is embedded in the welding step one, forming a multi-level boss fit, which replaces planar welding, increases the contact area, and improves the welding effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembled cross-section of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0018] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point B.

[0019] The reference numerals and names in the figure are as follows:

[0020] 1. Copper column; 11. Base plate; 12. Positioning block; 13. Positioning groove; 14. Welding groove; 141. Fitting groove; 142. Welding step one; 143. Welding step two; 144. Welding step three; 145. Friction groove; 2. Aluminum column; 21. Top plate; 22. Threaded groove; 23. Welding column; 231. Welding boss one; 232. Welding boss two; 233. Positioning column. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0024] Please see Figures 1 to 4 One embodiment of this utility model is a welded copper-aluminum composite negative electrode post, comprising:

[0025] The copper column 1 includes a base plate 11. A positioning block 12 is provided on one side of the base plate 11. A welding groove 14 is provided inside the positioning block 12. The welding groove 14 penetrates the positioning block 12. Four positioning grooves 13 are equally spaced in a ring array around the axis of the base plate 11. Each positioning groove 13 is C-shaped. The welding groove 14 includes an interlocking groove 141. A welding step 142 is provided on the inner edge of the interlocking groove 141. A welding step 2 143 is provided below the welding step 142. A welding step 3 144 is provided below the welding step 2 143. An arc-shaped friction groove 145 is provided at the connection part of the welding step 142, welding step 2 143 and welding step 3 144. The diameter of the welding step 142 is greater than the diameter of the welding step 2 143. The diameter of the welding step 2 143 is greater than the diameter of the welding step 3 144.

[0026] An aluminum column 2 is fixed to a copper column 1 by friction stir welding. The aluminum column 2 includes a top plate 21. A welding column 23 is provided on the side of the top plate 21 facing the copper column 1. The welding column 23 includes a welding boss 231 and a welding boss 232 on the side of the welding boss 231 facing the copper column 1. A threaded groove 22 is provided on the side of the top plate 21 away from the copper column 1. The welding column 23 includes a welding boss 231 and a welding boss 232 on the side facing the copper column 1. A positioning column 233 is provided on the side of the welding boss 232 away from the welding boss 231. Both the outer edges of the welding boss 231 and the welding boss 232 are provided with arc-shaped friction welding surfaces. The diameter of the welding boss 231 is larger than the diameter of the welding boss 232.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A welded copper-aluminum composite negative electrode post, characterized in that, include: A copper column (1) includes a base plate (11), a positioning block (12) is provided on one side of the base plate (11), and a welding groove (14) is provided inside the positioning block (12), which penetrates the positioning block (12). An aluminum column (2) is fixed to a copper column (1) by friction stir welding. The aluminum column (2) includes a top plate (21). A welding column (23) is provided on the side of the top plate (21) facing the copper column (1). The welding column (23) includes a welding boss one (231). A welding boss two (232) is provided on the side of the welding boss one (231) facing the copper column (1).

2. The welded copper-aluminum composite negative electrode post according to claim 1, characterized in that: The outer edge of the base plate (11) is provided with four positioning grooves (13) arranged in a ring array around its axis, and each positioning groove (13) is C-shaped.

3. The copper-aluminum composite negative electrode post with a welded structure according to claim 1, characterized in that: The welding groove (14) includes a fitting groove (141), the inner edge of which is provided with a welding step one (142), a welding step two (143) is provided below the welding step one (142), and a welding step three (144) is provided below the welding step two (143).

4. The copper-aluminum composite negative electrode post with a welded structure according to claim 3, characterized in that: The connection parts of welding step one (142), welding step two (143) and welding step three (144) are all provided with arc-shaped friction grooves (145), wherein the diameter of welding step one (142) is greater than the diameter of welding step two (143), and the diameter of welding step two (143) is greater than the diameter of welding step three (144).

5. The copper-aluminum composite negative electrode post with a welded structure according to claim 1, characterized in that: The top plate (21) has a threaded groove (22) on the side away from the copper column (1). The welding column (23) includes a welding boss one (231), and a welding boss two (232) is constructed on the side facing the copper column (1). A positioning column (233) is provided on the side of the welding boss two (232) away from the welding boss one (231).

6. The copper-aluminum composite negative electrode post with a welded structure according to claim 5, characterized in that: Both the first welding boss (231) and the second welding boss (232) have arc-shaped friction welding surfaces on their outer edges, and the diameter of the first welding boss (231) is greater than the diameter of the second welding boss (232).

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