Copper-aluminum composite riveting block

Abstract

The utility model provides a kind of copper-aluminum composite riveting block.The copper-aluminum composite riveting block includes body, tubular body one and tubular body two, the body is aluminium block and is plate-shaped, the body middle part has the accommodation through-hole passing through, the accommodation through-hole upper end port has recessed pressure riveting step, the tubular body one and tubular body two are located in accommodation through-hole, the tubular body lower end is flush with body lower end and is fixedly connected, the tubular body two is connected at tubular body one upper end and both inside flush, the tubular body two is tightly connected at pressure riveting step.The copper-aluminum composite riveting block is low in cost.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically to a copper-aluminum composite riveting block. Background Technology

[0002] The electrodes are connected to the cover plate of the battery end cap via a connecting block. To ensure lightweight design and good conductivity, the connecting block is typically made of copper-aluminum composite plate.

[0003] Currently, the pricing of copper-aluminum composite panels on the market is based on the price of pure copper, resulting in high material costs. There are also restrictions on minimum order quantities, and special production is required for different specifications and sizes.

[0004] Since copper accounts for a lower proportion of aluminum in copper-aluminum composite panels, purchasing copper and aluminum plates separately can significantly reduce procurement costs. However, how to effectively combine copper and aluminum plates is a key issue that urgently needs to be addressed.

[0005] In current battery cover production, aluminum and copper plates are typically pressed together using specialized rolling equipment. However, the high cost of this rolling equipment forces most companies to purchase expensive copper-aluminum composite plates.

[0006] Alternatively, laser welding can be used to weld copper and aluminum plates together. However, laser welding has several drawbacks, such as the significant difference in melting points between aluminum and copper, which can easily lead to the formation of brittle compounds due to metallurgical incompatibility; significant differences in thermophysical properties resulting in poor weld stability; mismatched laser absorption rates that easily generate porosity and cracks, affecting joint strength and reliability; and complex process parameters that are difficult to control. Therefore, the yield of copper-aluminum composite plates prepared using the above processes is unstable. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a copper-aluminum composite riveting block that is both low-cost and highly stable.

[0008] To achieve the above objectives, this utility model can be implemented through the following technical solutions:

[0009] A copper-aluminum composite riveting block, characterized in that it comprises a body, a tube body one, and a tube body two. The body is an aluminum block in the shape of a plate. The body has a through-hole in the middle and a recessed riveting step at the upper end of the through-hole. The tube body one and the tube body two are both located in the through-hole. The lower end of the tube body is flush with the lower end of the body and the two are fixedly connected. The tube body two is connected to the upper end of the tube body one and the inner sides of the two are flush. The tube body two is tightly fitted to the riveting step.

[0010] In the aforementioned copper-aluminum composite riveting block, the upper end of the second tube is flush with the upper end of the first plate.

[0011] In the aforementioned copper-aluminum composite riveting block, the first tube is made of aluminum, and the second tube is made of copper.

[0012] In the aforementioned copper-aluminum composite riveting block, the second tube has a pre-positioning structure between it and the inner side of the main body.

[0013] In the aforementioned copper-aluminum composite riveting block, the pre-positioning structure includes a guide block protruding from the outer side of the tube body and a positioning groove recessed in the inner wall of the accommodating through hole and matching the guide block, wherein the guide block is embedded in the positioning groove.

[0014] In the aforementioned copper-aluminum composite riveting block, the upper port of the positioning groove has an inlet portion that allows the guide block to smoothly embed into the positioning groove.

[0015] In the aforementioned copper-aluminum composite riveting block, the guide portion is a chamfer extending from the bottom of the riveting step into the positioning groove.

[0016] In the aforementioned copper-aluminum composite riveting block, the guide portion is a rounded corner extending from the bottom of the riveting step into the positioning groove.

[0017] In the aforementioned copper-aluminum composite riveting block, a buffer sheet is also provided on one outer side of the tube body. The buffer sheet is located directly below the guide block and there is a deformation gap between the buffer sheet and the guide block.

[0018] In the aforementioned copper-aluminum composite riveting block, the outer side of the buffer sheet is flush with the outer side of the guide block.

[0019] In the aforementioned copper-aluminum composite riveting block, the inlet, positioning groove, guide block, and buffer plate form a connecting unit. The number of connecting units is several, and the several connecting units are evenly distributed circumferentially on one outer side of the tube body.

[0020] Compared with existing technologies, this copper-aluminum composite riveting block, because both the main body and the first tube are made of the same material, has a better welding yield and effectively avoids the problem of low welding yield caused by the large difference in melting points between copper and aluminum. Meanwhile, the second tube is positioned at the accommodating through-hole on the upper part of the first tube by press riveting. Therefore, the main body, the first tube, and the second tube can be stably positioned and connected, resulting in not only a high yield but also high stability of the finished copper-aluminum composite riveting block.

[0021] At the same time, compared with directly using copper-aluminum composite raw materials, this structure has a relatively low cost and high practical value. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the copper-aluminum composite riveting block before it is riveted.

[0023] Figure 2yes Figure 1 A schematic diagram of the cross-sectional structure.

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure after tube body one and tube body two are connected.

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the copper-aluminum composite riveting block after the riveting process.

[0026] Figure 5 yes Figure 2 A schematic diagram of the partial structure at part A in the middle.

[0027] Figure 6 This is a three-dimensional structural diagram of the battery cover.

[0028] In the picture:

[0029] 1. Body; 11. Receiving through hole; 111. Press-fit step; 12. Positioning groove; 13. Inlet part; 2. Tube body one; 3. Tube body two; 4. Guide block; 5. Buffer plate; 6. Cover plate; 61. Connecting hole; 7. Explosion-proof valve; 8. Foolproof part. Detailed Implementation

[0030] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0031] like Figures 1-5 As shown, this copper-aluminum composite riveting block includes a body 1, a tube 2, and a tube 3. The body 1 is an aluminum block in the shape of a plate. The tube 2 is cylindrical and made of aluminum. The tube 3 is cylindrical and made of copper. The body 1 has a through hole 11 in the middle. The upper end of the through hole 11 has a recessed riveting step 111. The tube 2 and the tube 3 are both located in the through hole 11. The lower end of the tube 2 is flush with the lower end of the body 1 and the two are welded together. The tube 3 is connected to the upper end of the tube 2 and the inner sides of the two are flush. The tube 3 is tightly fitted to the riveting step.

[0032] Both the main body 1 and the tube 1 2 are made of aluminum, while the tube 2 3 is made of copper.

[0033] After the main body 1 and the tube body 2 are welded together, since the main body 1 and the tube body 2 are made of the same material, the main body 1 and the tube body 2 can be stably fixed together.

[0034] The tube body 3 matches the press-fit step 111 at the upper end of the accommodating through hole 11, meaning the outer diameter of the raw material tube body 3 is smaller than the size of the press-fit step 111. However, after the raw material tube body 3 is press-fitted, its height becomes shorter and its outer diameter becomes larger. In other words, the tube body 3 and the press-fit step form a stable mating connection through a tight fit.

[0035] Of course, during the riveting process, the columnar structure in the mold is inserted into tube body 2 and tube body 3 to prevent changes in the inner diameter of tube body 2 and tube body 3 after the riveting operation. However, this technical feature belongs to the manufacturing process. Therefore, this embodiment will not elaborate on the manufacturing process.

[0036] It can be seen that the copper tube body 2 (3) combined with the aluminum tube body 1 (2) enables the entire composite riveting block to have good electrical conductivity and be lightweight. Moreover, the aluminum body 1 and tube body 1 (2) are made of the same material, which facilitates welding and results in a high welding yield.

[0037] The upper end of the tube body 2 3 is flush with the upper end of the plate body 2.

[0038] This effectively improves the structural compactness of the entire composite riveting block.

[0039] The tube 2 3 has a pre-positioning structure between it and the inner side of the main body 1.

[0040] The pre-positioning structure can stably connect the tube 2 to the body 1 in a pre-positioning manner.

[0041] The prepositioning structure includes a guide block 4 protruding from the outer side of the tube body 2 and a positioning groove 12 recessed in the inner wall of the accommodating through hole 11 and matching the guide block 4, wherein the guide block 4 is embedded in the positioning groove 12.

[0042] The outer side of the tube body 2 has several guide blocks 4 along its circumference. The accommodating through hole 11 has a positioning groove 12 that corresponds to the guide block 4. The guide block 4 is embedded in the corresponding positioning groove 12. This structure ultimately connects the tube body 2 and the main body 1 in a stable pre-positioned connection.

[0043] The upper port of the positioning groove 12 has an inlet portion 13 that allows the guide block 4 to be smoothly embedded into the positioning groove 12.

[0044] In this embodiment, the inlet portion 13 is a chamfer that extends from the bottom of the riveting step 111 into the positioning groove 12.

[0045] Depending on the actual situation, it is also feasible for the inlet portion 13 to be a rounded corner extending from the bottom of the riveting step 111 into the positioning groove 12.

[0046] The placement of the inlet section 13 allows the guide block 4 to be smoothly embedded in the positioning groove 12.

[0047] It can be seen that the inlet section 13, whether it has a chamfered structure or a rounded corner structure, can accurately guide the guide block 4.

[0048] The outer side of the tube body 2 is also provided with a buffer plate 5, which is located directly below the guide block 4 and has a deformation gap between the buffer plate 5 and the guide block 4.

[0049] When tube 2 is pre-connected to body 1, buffer plate 5 abuts against the lower end of positioning groove 12.

[0050] During the riveting connection between the tube body 2 and the main body 1, the buffer plate 5 deforms after the tube body 2 is subjected to the above-mentioned riveting force, effectively preventing rigid contact between the guide block 4 and the main body 1.

[0051] Because the force applied during the riveting process is relatively large, if the guide block 4 is in direct rigid contact with the lower end of the positioning groove 12, the guide block 4 is easily damaged, causing the tube body 2 to deviate relative to the main body 1. During the actual assembly process, the aluminum tube body 2 and the aluminum main body are welded to obtain a semi-finished product. Then, the semi-finished product is placed on the corresponding working plane for riveting. Throughout the process, the guide block 4 is not subjected to force and only plays a guiding role.

[0052] The outer side of the buffer sheet 5 is flush with the outer side of the guide block 4.

[0053] This structure can appropriately improve the structural compactness of tube body 2.

[0054] The inlet 13, positioning groove 12, guide block 4 and buffer 5 form a connecting unit. There are several connecting units, which are evenly distributed circumferentially on one outer side of the tube body.

[0055] The arrangement of multiple connection units enables the tube 2 to be stably connected within the receiving through hole 11 of the body 1.

[0056] Because the main body and tube one are made of the same material, the welding of these two copper-aluminum composite riveting blocks results in a higher welding yield, effectively avoiding the low welding yield caused by the large difference in melting points between copper and aluminum. Simultaneously, tube two is positioned at the accommodating through-hole on the upper part of tube one through a press-fitting method. Therefore, the main body, tube one, and tube two can be stably positioned and connected, resulting in not only a high yield rate but also high stability of the finished copper-aluminum composite riveting block.

[0057] At the same time, compared with directly using copper-aluminum composite raw materials, this structure has a relatively low cost and high practical value.

[0058] This copper-aluminum composite riveting block is used on battery end caps.

[0059] The battery end cap includes a long, plate-shaped cover plate 6. The cover plate 6 has an explosion-proof valve 7 in the middle, and through connection holes 61 at both ends. This copper-aluminum composite riveting block is connected to the connection holes 61 of the cover plate 6, see... Figure 6 As shown.

[0060] In this embodiment, the main body is rectangular, and one of the corners of the main body 1 has a foolproof part 8 formed after cutting. When the copper-aluminum composite riveting block is installed and connected to the main body 1, the foolproof part 8 reminds the copper-aluminum composite riveting block to be installed on the cover plate 6 at the correct angle.

[0061] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application's technical solution are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0062] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A copper-aluminum composite rivet slug, characterized by, The device includes a main body, a first tube, and a second tube. The main body is an aluminum block in the shape of a plate. The main body has a through-hole in the middle and a recessed riveting step at the upper end of the through-hole. The first tube and the second tube are both located inside the through-hole. The lower end of the first tube is flush with the lower end of the main body and the two are fixedly connected. The second tube is connected to the upper end of the first tube and the inner sides of the two are flush. The second tube is tightly fitted to the riveting step.

2. The copper-aluminum composite rivet slug of claim 1, wherein, The first tube is made of aluminum, and the second tube is made of copper.

3. The copper-aluminum composite rivet slug of claim 1, wherein, The second tube has a pre-positioning structure between it and the inner side of the main body.

4. The copper-aluminum composite rivet slug of claim 1 or 2 or 3, wherein, The pre-positioning structure includes a guide block protruding from the outer side of the tube body and a positioning groove recessed in the inner wall of the accommodating through hole and matching the guide block, wherein the guide block is embedded in the positioning groove.

5. The copper-aluminum composite rivet slug of claim 4, wherein, The upper port of the positioning groove has an inlet portion that allows the guide block to be smoothly embedded into the positioning groove.

6. The copper-aluminum composite riveting block according to claim 5, characterized in that, The inlet portion is a chamfer that extends from the bottom of the press-fit step into the positioning groove.

7. The copper-aluminum composite rivet slug of claim 5, wherein, The outer side of the tube body also has a buffer plate, which is located directly below the guide block and has a deformation gap between the buffer plate and the guide block.

8. The copper-aluminum composite rivet slug of claim 7, wherein, The outer side of the buffer sheet is flush with the outer side of the guide block.

9. The copper-aluminum composite rivet slug of claim 8, wherein, The inlet, positioning groove, guide block and buffer plate form a connecting unit, and there are several connecting units, which are evenly distributed circumferentially on one outer side of the tube body.

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