A copper-aluminum pole structure
By forming copper and aluminum plates separately and then welding them together to create copper-aluminum poles, the problems of excessive waste and high cost in the preparation of copper-aluminum poles are solved, achieving low-cost and high-efficiency copper-aluminum pole connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO ZHENYU AUTO PARTS CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-30
AI Technical Summary
The current process of preparing copper-aluminum electrodes generates a lot of waste, has low raw material utilization, and high procurement costs, which leads to increased production costs.
Copper and aluminum electrodes are formed using copper and aluminum plates respectively, and a welding interface layer is formed by ultrasonic welding or laser welding. The copper and aluminum electrodes are fixed in surface-to-surface contact, and the thickness of the welding interface layer is greater than 0.1 mm, which meets the requirements for composite connection strength.
It reduced production costs, improved raw material utilization, and met the connection strength requirements of copper-aluminum poles.
Smart Images
Figure CN224437880U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of electrode structure for new energy vehicle batteries, and in particular to a copper-aluminum electrode structure. Background Technology
[0002] Copper-aluminum terminals are important components in new energy batteries, mainly used as the negative electrode. However, in the current technology, copper-aluminum terminals are made by purchasing copper-aluminum composite strips. During the manufacturing process, the copper-aluminum composite strips are batch-cut in a stamping machine to form copper-aluminum terminals. However, this method generates a lot of waste during the forming of copper-aluminum terminals, resulting in low raw material utilization and significant material waste. In addition, the purchase cost of copper-aluminum composite strips is high, which increases the production cost. Therefore, there is an urgent need for improvement. Utility Model Content
[0003] The purpose of this utility model is to design a copper-aluminum pole structure to overcome the shortcomings of the above-mentioned technology.
[0004] The copper-aluminum pole structure designed in this utility model includes:
[0005] A copper electrode post, the copper electrode post comprising a first electrode post body and a first fixing body formed on the periphery of the first electrode post body;
[0006] An aluminum electrode post, the aluminum electrode post comprising a second electrode post body and a second fixing body formed on the periphery of the second electrode post body;
[0007] The bottom of the second pole piece and / or the bottom of the second fixing body are in contact with the top of the first pole piece and are welded to each other. A welding interface layer is formed between the second pole piece and / or the second fixing body and the first pole piece due to welding, and the thickness of the welding interface layer is >0.1mm.
[0008] According to the copper-aluminum pole structure described above, the top surface of the first pole body has a number of protrusions, and the second fixing body has a number of pole holes that correspond to and are adapted to the position of each protrusion, with the protrusions correspondingly inserted into the pole holes.
[0009] According to the copper-aluminum pole structure described above, the upper end of the protruding post extends to the outside so that the end face of the protruding post is higher than the top surface of the second fixing body.
[0010] According to the copper-aluminum electrode structure described above, the bottom surface of the second electrode and / or the bottom surface of the second fixing body are fixed to the top surface of the first electrode by ultrasonic welding or laser welding. According to the copper-aluminum electrode structure described above, there is a height difference between the top surface of the first electrode and the top surface of the first fixing body.
[0011] According to the copper-aluminum pole structure described above, there is a height difference between the top surface of the second pole body and the top surface of the second fixing body.
[0012] According to the copper-aluminum electrode structure described above, a cavity is formed in the first electrode body.
[0013] According to the copper-aluminum pole structure described above, the top surface of the cavity is formed by laser welding to form at least one annular welding position arranged in a ring-like pattern, and a welding interface layer is formed in the annular welding position.
[0014] According to the copper-aluminum electrode structure described above, the copper electrode is formed by stamping a copper plate, so that the copper plate is extruded to form a convex hull, a first fixing body on the periphery of the convex hull, a convex post on the top surface of the convex hull, and a cavity inside the convex hull, the convex hull serving as the first electrode body.
[0015] According to the copper-aluminum electrode structure described above, the aluminum electrode is formed by stamping an aluminum plate, so that the aluminum plate is extruded to form a protrusion and a second fixing body around the protrusion, the protrusion serving as the second electrode body.
[0016] According to the copper-aluminum electrode structure described above, the bottom surface of the aluminum electrode is provided with a fixing groove, and the top of the first electrode body is positioned in the fixing groove.
[0017] The copper-aluminum pole structure described in this utility model has the following beneficial effects:
[0018] The copper-aluminum electrode structure of this utility model utilizes copper and aluminum plates purchased separately to form copper and aluminum electrodes, respectively. The formed aluminum and copper electrodes are then brought into surface-to-surface contact and fixed together by ultrasonic welding or laser welding, thereby forming a copper-aluminum electrode structure. This formed structure reduces production costs, and the weld interface layer in the formed copper-aluminum electrode structure is greater than 0.1mm, meeting the strength requirements of the composite connection of copper-aluminum electrodes. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the pole structure (I).
[0020] Figure 2 This is a bottom view of the pole structure (I).
[0021] Figure 3 This is a schematic diagram of the pole structure (II).
[0022] Figure 4 This is the bottom view (II) of the pole structure.
[0023] Figure 5 This is a schematic diagram of the pole post structure combination.
[0024] Figure 6This is an exploded view of the pole structure.
[0025] Figure 7 This is a schematic diagram of the pole structure (III).
[0026] Figure 8 This is the bottom view of the pole structure (III).
[0027] Figure 9 This is a schematic diagram of the pole structure (IV).
[0028] Figure 10 This is the bottom view of the pole structure (IV).
[0029] Figure 11 This is a schematic diagram of the pole structure (V).
[0030] Figure 12 This is a schematic diagram of the aluminum electrode post.
[0031] Figure 13 This is a schematic diagram of the exploded structure of a copper-aluminum electrode.
[0032] Figure 14 This is the bottom view of the pole structure (V).
[0033] Figure 15 This is a schematic diagram of the pole structure (VI).
[0034] Figure 16 This is a bottom view of the pole structure (VI).
[0035] Reference numerals: 1. Copper pole; 2. Aluminum pole; 3. Welding interface layer; 11. First pole body; 12. First fixing body; 13. Protrusion; 14. Cavity; 21. Second pole body; 22. Second fixing body; 23. Pole hole; 24. Fixing groove; 4. Annular welding position. Detailed Implementation
[0036] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.
[0037] Example 1:
[0038] Figures 1-5As shown in the figure, the copper-aluminum electrode structure described in this embodiment includes a copper electrode 1 and an aluminum electrode 2. The copper electrode 1 is formed by stamping a copper plate to form a convex bulge, a first fixing body 12 on the periphery of the bulge, a convex post 13 on the top surface of the bulge, and a cavity 14 inside the bulge. The bulge serves as the first electrode 11. The aluminum electrode 2 is formed by stamping an aluminum plate to form a protrusion and a second fixing body 22 on the periphery of the protrusion. The protrusion serves as the second electrode 21. The first electrode 11, the second fixing body 22, and the second electrode 21 can be set as square or round according to the requirements of the electrode structure. The first fixing body 12 is preferably square, but can be round in other cases.
[0039] The copper electrode post 1 includes a first electrode post 11 and a first fixing body 12 formed around the first electrode post 11; the aluminum electrode post 2 includes a second electrode post 21 and a second fixing body 22 formed around the second electrode post 21; the bottom of the second electrode post 21 and / or the bottom of the second fixing body 22 are welded to the top of the first electrode post 11, and a welding interface layer 3 is formed between the second electrode post 21 and / or the second fixing body 22 and the first electrode post 11 due to welding, and the thickness of the welding interface layer 3 is... The thickness is greater than 0.1 mm; specifically, the bottom of the second pole piece 21 and / or the bottom of the second fixing body 22 are fixed to the top of the first pole piece 11 by ultrasonic welding or laser welding. A cavity 14 is recessed on the first pole piece 11. The cavity 14 makes it easier to perform ultrasonic welding or laser welding between the upper side wall of the cavity 14 and the aluminum pole piece 2. During ultrasonic welding, the welding operation is performed through the top surface of the cavity 14, so that the bottom of the second pole piece 21 and the bottom of the second fixing body 22 are partially joined together. A welding interface layer 3 is formed between the connecting part formed by the two pole pieces and the top of the first pole piece 11, or between the bottom of the second pole piece 21 and the top of the first pole piece 11, or between a partial position of the bottom of the second fixing body 22 and the top of the first pole piece 11. During laser welding, at least one annular welding position 4 is formed on the top surface of the cavity 14. A welding interface layer 3 is formed in the annular welding position 4. The welding interface layer 3 formed in each annular welding position 4 is used to form a welding interface layer 3 between the connecting part formed by the bottom of the second pole piece 21 and the bottom partial position of the second fixing body 22 and the top of the first pole piece 11, or between the bottom of the second pole piece 21 and the top of the first pole piece 11, or between a partial position of the bottom of the second fixing body 22 and the top of the first pole piece 11. When there are multiple annular welding positions 4 and they are distributed in a ring-like pattern, the multiple annular welding positions 4 are spaced apart from each other. The welding interface layer 3 is formed when the high temperature generated during ultrasonic welding or laser welding causes the aluminum and copper materials to melt and solidify together. Especially during laser welding, energy is applied from the top surface of the cavity 14. Under the action of welding energy, the penetration welding is achieved, so that part of the copper material at the top of the cavity 14 melts and solidifies with part of the aluminum material of the second pole piece 21 and / or the second fixed body 22 to form a copper-aluminum welding interface layer 3 with welded fusion. The thickness of the welding interface layer 3 is >0.1mm.
[0040] Furthermore, the maximum thickness of the top of the first pole post 11 is generally 1.1 mm. For example, the thickness of the top of the first pole post 11 is 1 mm. After the welding interface layer 3 is formed between the second pole post 21 and / or the second fixing body 22 and the first pole post 11 due to welding, the thickness of the welding interface layer 3 is greater than 1 mm.
[0041] Example 2:
[0042] like Figures 6-10 As shown, the copper-aluminum electrode structure described in this embodiment is roughly similar to that in Embodiment 1, but the difference is that the top surface of the first electrode body 11 has a number of protruding posts 13, and the second fixing body 22 has a number of posts 23 that correspond to and fit the position of each protruding post 13. The protruding posts 13 are inserted into the posts 23. The structure is designed so that the copper electrode 1 and the aluminum electrode 2 can be pre-positioned before they are welded together, thereby achieving high positional accuracy of the copper electrode 1 and the aluminum electrode 2. The number of protruding posts 13 and posts 23 is set to multiple, and they are generally arranged in a four-ring array.
[0043] Preferably, the upper end of the protruding post 13 extends outward, so that the end face of the protruding post 13 is higher than the top surface of the second fixing body 22. There is a height difference between the top surface of the first pole post 11 and the top surface of the first fixing body 12, and there is a height difference between the top surface of the second pole post 21 and the top surface of the second fixing body 22. The angle between the peripheral side surface of the first pole post 11 and the first fixing body 12 is a right angle; the angle between the peripheral side surface of the second pole post 21 and the second fixing body 22 is a right angle. This structure is designed to fit into the pole post mounting hole of the top cover plate.
[0044] Example 3:
[0045] like Figures 11-16 As shown, the copper-aluminum pole structure described in this embodiment is roughly similar to that of Embodiment 1, but the difference is that the bottom surface of the aluminum pole 2 is provided with a fixing groove 24. After the top of the first pole body 11 is positioned in the fixing groove 24, the top of the first pole body 11 and the inner bottom surface of the fixing groove 24 are ultrasonically welded or laser welded together.
Claims
1. A copper-aluminum pole structure, characterized in that, include: Copper pole (1), the copper pole (1) includes a first pole body (11) and a first fixing body (12) formed on the periphery of the first pole body (11). Aluminum pole (2), the aluminum pole (2) includes a second pole body (21) and a second fixing body (22) formed on the periphery of the second pole body (21); The bottom of the second pole post (21) and / or the bottom of the second fixing body (22) are welded to the top of the first pole post (11), and a welding interface layer (3) is formed between the second pole post (21) and / or the second fixing body (22) and the first pole post (11) due to welding, and the thickness of the welding interface layer (3) is >0.1mm.
2. The copper-aluminum pole structure according to claim 1, characterized in that, The top surface of the first pole post (11) has a plurality of protrusions (13), and the second fixing body (22) has a plurality of column holes (23) that correspond to and fit the position of each protrusion (13), and the protrusions (13) are inserted into the column holes (23).
3. The copper-aluminum pole structure according to claim 2, characterized in that, The upper end of the protruding post (13) extends outward so that the end face of the protruding post (13) is higher than the top surface of the second fixing body (22).
4. The copper-aluminum pole structure according to claim 1, characterized in that, The bottom surface of the second pole piece (21) and / or the bottom surface of the second fixing body (22) are fixed to the top surface of the first pole piece (11) by ultrasonic welding or laser welding.
5. The copper-aluminum pole structure according to claim 1, characterized in that, There is a height difference between the top surface of the second pole piece (21) and the top surface of the second fixed body (22); there is a height difference between the top surface of the first pole piece (11) and the top surface of the first fixed body (12).
6. The copper-aluminum pole structure according to claim 4, characterized in that, A cavity (14) is formed on the first pole post (11).
7. A copper-aluminum pole structure according to claim 6, characterized in that, The top surface of the cavity (14) is formed by laser welding to form at least one annular welding position (4) arranged in the shape of annual rings, and a welding interface layer (3) is formed in each annular welding position (4).
8. The copper-aluminum pole structure according to claim 1, characterized in that, The copper pole post (1) is formed by stamping a copper plate so that the copper plate is extruded to form a convex hull, a first fixing body (12) on the periphery of the convex hull, a convex post (13) on the top surface of the convex hull, and a cavity (14) inside the convex hull. The convex hull serves as the first pole post (11).
9. A copper-aluminum pole structure according to claim 1 or 8, characterized in that, The aluminum pole post (2) is formed by stamping an aluminum plate so that the aluminum plate is extruded to form a protrusion and a second fixing body (22) around the protrusion, the protrusion serving as the second pole post (21).
10. A copper-aluminum pole structure according to claim 1, characterized in that, The bottom surface of the aluminum pole post (2) is provided with a fixing groove (24), and the top of the first pole post (11) is positioned in the fixing groove (24).