New energy battery copper bar
By using riveting grooves, limit gear rings and welding material filling zones in the copper bar of new energy battery, the problems of waste of materials and limited connection strength in traditional riveting methods are solved, and more compact, efficient and reliable connections are achieved, simplifying the production process and reducing costs.
Patent Information
- Application Number
- CN202421929937.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-10
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-10
AI Technical Summary
The copper row of traditional new energy batteries has problems of waste of materials and limited connection strength during the riveting connection process.
Riveted grooves replace the traditional bump ends, combined with the limit gear ring and welding material filling area, for a more secure and reliable mechanical and electrical connection.
It saves materials, improves the compactness and efficiency of the overall structure, achieves a firmer connection, simplifies the production process, and reduces production costs.
Smart Images
Figure CN222980723U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of new energy batteries, and in particular to a copper busbar for a new energy battery. Background Art
[0002] The copper busbar of new energy batteries is mainly used as a connecting component between battery modules. Its core function is to ensure that the current can be transmitted smoothly and efficiently between different battery modules. In order to achieve this function, Figure 1 As shown, the new energy battery copper busbar is usually composed of a copper busbar part A1 and an aluminum column part A2.
[0003] The copper busbar A1 is the main part of the copper busbar of the new energy battery. It is made of high-quality copper material with good conductivity and corrosion resistance. The design of the copper busbar A1 needs to take into account the needs of current transmission, so its size and shape need to be accurately calculated and designed to ensure smooth current transmission.
[0004] The aluminum column A2 is usually used to connect the copper bar A1 and the battery module, or to connect different copper bar A1. The aluminum column A2 has good conductivity and mechanical strength, and can withstand mechanical stress and vibration between battery modules. At the same time, the weight of the aluminum column A2 is relatively light, which also helps to reduce the weight of the entire battery system and improve the energy efficiency of new energy vehicles.
[0005] In the traditional riveting method, the upper end of the aluminum column A2 is designed as a convex end A11, and its diameter is larger than the connection hole of the copper bar. This is to ensure that the convex end A11 can play a role of temporary fixing and limiting during the riveting process. A rectangular limiting ring A12 is arranged below the convex end A11, and the rectangular through hole opened on the copper bar can just allow the aluminum column A2 and the rectangular limiting ring A12 to pass through. During the riveting process, the lower end of the aluminum column A2 passes through the rectangular through hole, and the rectangular limiting ring A12 also passes through the rectangular through hole. Then, the convex end A11 is used for limiting to ensure that the aluminum column A2 and the rectangular limiting ring A12 will not move before riveting. Then, the rectangular limiting ring A12 is rotated to stagger the rectangular through hole of the copper bar. This step is to ensure that the rectangular limiting ring A12 can be compressed and firmly fixed on the copper bar during riveting, thereby realizing the mechanical connection between the aluminum column A2 and the copper bar. Finally, the aluminum column A2 is fixed on the copper bar by riveting the rectangular limiting ring A12. During the riveting process, the rectangular limiting ring A12 will deform and tightly wrap the copper busbar and the aluminum column A2 to form a firm connection.
[0006] Although this traditional riveting method can achieve the connection between the aluminum column A2 and the copper busbar, it does have some problems, such as material waste, the protruding head end A11 only plays a limiting role, and the connection strength is limited and depends on the deformation and fixation of the rectangular limiting ring A12. Utility Model Content
[0007] The purpose of this application is to provide a copper busbar for a new energy battery. By replacing the convex head end with a riveting groove, this application not only saves materials but also makes the structure more compact and efficient. Through the design of the riveting groove, the limiting retaining ring, and the welding material filling area, this application achieves a more secure and reliable mechanical and electrical connection. This application simplifies the production process, reduces production steps, improves production efficiency, and reduces production costs.
[0008] To achieve the above object, this application provides the following technical solutions:
[0009] A copper busbar for a new energy battery, comprising a copper busbar part and an aluminum column. The copper busbar part has a riveting and welding hole. The upper end of the aluminum column is provided with a riveting groove. A limiting retaining ring is arranged near the upper end of the aluminum column. The upper end of the aluminum column passes through the riveting and welding hole of the copper busbar part and is limited by the limiting retaining ring. The upper end of the aluminum column is in clearance fit with the riveting and welding hole of the copper busbar part. A welding material filling area is arranged at the upper hole edge of the riveting and welding hole.
[0010] Further, the riveting and welding hole includes a first stepped hole and a second stepped hole. The diameter of the first stepped hole is slightly larger than the diameter of the connecting aluminum column. The diameter of the second stepped hole is larger than the diameter of the first stepped hole.
[0011] Further, the range of the difference between the diameter of the second stepped hole and the diameter of the first stepped hole is between 5 mm and 10 mm.
[0012] Further, the riveting groove is circular.
[0013] Further, a rough layer is provided at the upper end of the aluminum column corresponding to the riveting and welding hole to increase the friction between the upper end of the aluminum column and the riveting and welding hole.
[0014] Further, a rough layer is provided at the inner wall of the riveting and welding hole corresponding to the upper end of the aluminum column to increase the friction between the riveting and welding hole and the upper end of the aluminum column.
[0015] Further, the riveting groove includes a first groove and a second groove. The diameter of the first groove is larger than the diameter of the second groove.
[0016] The beneficial effects of this application are as follows:
[0017] (1) In the traditional method, the convex head end of the aluminum column only plays a role of temporary fixation and limitation and does not bear the structural or conductive function in the final connection, thus causing a certain amount of material waste. In this application, the riveting groove opened at the upper end of the aluminum column replaces the convex head end, which not only saves materials but also makes the overall structure more compact and efficient.
[0018] (2) The traditional method relies on the deformation and fixation of the rectangular limiting ring to achieve connection, and its connection strength is limited. In this application, through the design of the riveting groove at the upper end of the aluminum column and the limiting retaining ring, as well as the welding material filling area at the edge of the riveting and welding hole, a more firm and reliable mechanical and electrical connection is achieved.
[0019] (3) The traditional method requires multiple steps, including rotating the rectangular limiting ring to stagger the rectangular through-holes of the copper busbar, etc., and the production process is relatively complex; this application simplifies the production process, reduces the production steps, improves the production efficiency, and reduces the production cost. Description of the Drawings
[0020] Figure 1 It is a schematic structural diagram of the copper busbar of a new energy battery in the prior art;
[0021] Figure 2 It is a three-dimensional structural diagram of the copper busbar of a new energy battery in the embodiment of this application;
[0022] Figure 3 It is a schematic structural diagram after the copper busbar part and the aluminum column are separated in the embodiment of this application;
[0023] Figure 4 It is a cross-sectional view of the first stepped hole and the second stepped hole of the riveting and welding hole of the copper busbar part in the embodiment of this application;
[0024] Figure 5 It is a schematic structural diagram of the rough layer of the aluminum column in the embodiment of this application;
[0025] Figure 6 It is a schematic structural diagram of the rough layer of the riveting groove in the embodiment of this application;
[0026] Figure 7 It is a schematic structural diagram of the first groove and the second groove of the aluminum column in the embodiment of this application;
[0027] Description of the Reference Numerals:
[0028] A1, copper busbar part; A2, aluminum column; A11, convex head end; A12, rectangular limiting ring;
[0029] 1, copper busbar part; 2, aluminum column; 3, rough layer;
[0030] 11, vertical part; 12, horizontal part; 13, mounting hole; 14, riveting and welding hole; 15, welding material filling area;
[0031] 21, limiting retaining ring; 22, riveting groove;
[0032] 141, first stepped hole; 142, second stepped hole;
[0033] 221, first groove; 222, second groove; Detailed Implementation Modes
[0034] The terms used in the implementation mode part of this application are only used to explain the specific embodiments of this application, rather than aiming to limit this application. The implementation modes of the embodiments of this application will be described in detail below with reference to the drawings.
[0035] As Figure 2 shown, a copper busbar for a new energy battery includes a copper busbar part 1 and an aluminum column 2.
[0036] As Figure 2 shown, the copper busbar part 1 includes a vertical part 11 and a horizontal part 12. The vertical part 11 has a mounting hole 13. The copper busbar part 1 is the main part of the copper busbar for the new energy battery and is made of high-quality copper material, having good electrical conductivity and corrosion resistance, ensuring that the current can be smoothly and efficiently transmitted between different battery modules.
[0037] As Figure 3 shown, the aluminum column 2 is used to connect the copper busbar part 1 and the battery module or different copper busbar parts 1 to realize the current transmission of the entire battery system. Through the riveting groove 22 at the upper end and the limit retaining ring 21 cooperating with the riveting and welding hole 14 of the copper busbar part 1, the positioning and fixing of the aluminum column 2 are realized, ensuring the stability and reliability of the connection. The aluminum column 2 is made of aluminum material and has good electrical conductivity and mechanical strength.
[0038] As Figure 3 shown, the riveting and welding hole 14 provides a passing channel for the aluminum column 2 to realize the connection between the aluminum column 2 and the copper busbar part 1. The edge thereof forms a welding material filling area 15 by means of rounding off the corners, which provides a basis for subsequent welding operations and ensures the firmness and electrical conductivity of the welding. The riveting and welding hole 14 is formed by a punching process during the processing of the copper busbar part 1.
[0039] The riveting groove 22 cooperates with the riveting and welding hole 14 of the copper busbar part 1 to realize the preliminary positioning of the aluminum column 2; the limit retaining ring 21 further ensures the stability of the aluminum column 2 during the riveting process and prevents it from moving or falling off. The riveting groove 22 is formed by a specific process (such as machining or stamping) during the processing of the aluminum column 2.
[0040] As Figure 3 shown, the copper busbar part 1 has a riveting and welding hole 14. The upper end of the aluminum column 2 is provided with a riveting groove 22. A limit retaining ring 21 is arranged near the upper end of the aluminum column 2. The upper end of the aluminum column 2 passes through the riveting and welding hole 14 of the copper busbar part 1 and is positioned by the limit retaining ring 21. The upper end of the aluminum column 2 has a clearance fit with the riveting and welding hole 14 of the copper busbar part 1. The upper hole edge of the riveting and welding hole 14 is provided with a welding material filling area 15.
[0041] As Figure 4As shown, in this embodiment, the riveting and welding hole 14 includes a first stepped hole 141 and a second stepped hole 142. The diameter of the first stepped hole 141 is slightly larger than the diameter of the connecting aluminum column 2, and the diameter of the second stepped hole 142 is larger than the diameter of the first stepped hole 141. The diameter of the first stepped hole 141 being slightly larger than the diameter of the aluminum column 2 provides an accurate guide and preliminary positioning for the aluminum column 2. This ensures that the aluminum column 2 can easily and accurately pass through the first stepped hole 141, preparing for the subsequent riveting operation. During the riveting process, the upper end of the aluminum column 2 is subjected to the force of the riveting tool, causing it to extend towards the second stepped hole 142. This design allows the aluminum column 2 to undergo plastic deformation during riveting, thereby filling and tightly fitting the second stepped hole 142 to form a firm mechanical connection.
[0042] By riveting to extend the upper end of the aluminum column 2 and tightly fit it to the second stepped hole 142, the contact area and friction between the aluminum column 2 and the copper row part 1 can be increased, thereby enhancing the firmness and stability of the connection. This design helps to improve the overall mechanical strength and electrical performance of the copper row of the new energy battery.
[0043] In this embodiment, the difference in diameter between the second stepped hole 142 and the first stepped hole 141 ranges from 5 mm to 10 mm. The best embodiment is that the difference in diameter between the second stepped hole 142 and the first stepped hole 141 ranges from 7 mm.
[0044] In this embodiment, the riveting groove 22 is circular. By optimizing the flow of the material, the circular groove can ensure a more uniform contact surface between the aluminum column 2 and the copper row part 1, thereby enhancing the mechanical strength of the connection. This uniform contact helps to disperse stress and improve the durability and reliability of the connection.
[0045] As Figure 5 shown, in this embodiment, a rough layer 3 is provided at the upper end of the aluminum column 2 corresponding to the riveting and welding hole 14 to increase the friction between the upper end of the aluminum column 2 and the riveting and welding hole 14. The increased friction helps to more effectively transfer the riveting force to the connection interface, promote plastic deformation and tight fitting of the material, and thereby improve the mechanical strength of the connection.
[0046] As Figure 6 shown, in this embodiment, a rough layer 3 is provided on the inner wall of the riveting and welding hole 14 corresponding to the upper end of the aluminum column 2 to increase the friction between the riveting and welding hole 14 and the upper end of the aluminum column 2. The increased friction helps to more effectively transfer the riveting force to the connection interface, promote plastic deformation and tight fitting of the material around the aluminum column 2 and the riveting and welding hole 14, and thereby improve the mechanical strength of the connection.
[0047] The forming method of the rough layer 3 can be: using grinding tools such as sandpaper and grinding wheels to grind the upper end of the aluminum column 2 to remove the smooth layer on the surface and form the required roughness.
[0048] The forming method of the rough layer 3 can be: using media such as sand grains or steel shots ejected at high speed to impact the surface of the aluminum column 2 to form the rough layer 3.
[0049] As Figure 7 shown, in this embodiment, the riveting groove 22 includes a first groove 221 and a second groove 222, and the diameter of the first groove 221 is larger than that of the second groove 222. This gradually expanding groove design can more precisely control the shape and size of the riveting joint by gradually expanding the hole when reaming the riveting groove 22. This helps to ensure the tight fit between the riveting joint and the aluminum column 2 and the copper row part 1, thereby improving the mechanical strength and electrical performance of the connection.
[0050] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.
[0051] The device or element referred to in the embodiments of the present application or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and precisely defined.
[0052] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described here, for example, can be implemented in an order other than those illustrated or described here. In addition, the terms "may include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. And these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A copper busbar for a new energy battery, characterized in that: It includes a copper busbar part and an aluminum column. The copper busbar part has a riveted welding hole. The upper end of the aluminum column is provided with a riveted groove. A limit ring is arranged near the upper end of the aluminum column. The upper end of the aluminum column passes through the riveted welding hole of the copper busbar part and is limited by the limit ring. The upper end of the aluminum column is gap-matched with the riveted welding hole of the copper busbar part, and a welding material filling area is arranged at the upper end hole edge of the riveted welding hole.
2. A copper busbar for a new energy battery according to claim 1, characterized in that: The riveting welding hole includes a first step hole and a second step hole, the diameter of the first step hole is slightly larger than the diameter of the connected aluminum column, and the diameter of the second step hole is larger than the diameter of the first step hole.
3. A copper busbar for a new energy battery according to claim 2, characterized in that: The difference between the diameters of the second step hole and the first step hole ranges from 5 mm to 10 mm.
4. A copper busbar for a new energy battery according to claim 1, characterized in that: The riveting groove is circular.
5. The copper busbar for a new energy battery according to claim 1, characterized in that: A rough layer is arranged at the upper end of the aluminum column corresponding to the riveting welding hole to increase the friction between the upper end of the aluminum column and the riveting welding hole.
6. The copper busbar for a new energy battery according to claim 1, characterized in that: A rough layer is provided at the inner wall of the riveting welding hole corresponding to the upper end of the aluminum column to increase the friction between the riveting welding hole and the upper end of the aluminum column.
7. The copper busbar for a new energy battery according to claim 1, characterized in that: The riveting groove includes a first groove and a second groove, and the diameter of the first groove is greater than the diameter of the second groove.