A connection structure between electrically conductive members

Abstract

The utility model discloses a connecting structure between conductive parts, including first conductive part, second conductive part and insert, be provided with first connecting hole on first conductive part, second conductive part is overlapped and arranged on first conductive part, and insert is placed in first connecting hole, and the insert is connected with first conductive part through laser welding, and the insert is fixedly installed on the second conductive part, the utility model discloses a set of insert is connected first conductive part and second conductive part, makes the insert respectively with first conductive part, second conductive part obtains enough docking surface, and through the combination connecting structure of laser welding and laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosion welding and cold pressure connection, improve the connecting strength of first conductive part and second conductive part.

Description

Technical Field

[0001] This utility model relates to the field of first conductive components, and in particular to a connection structure between conductive components. Background Technology

[0002] In recent years, the automotive industry has developed rapidly along with the improvement of the economy and people's living standards. Among them, automotive busbars are a type of conductor used in automobiles as a secondary conductive component. Common automotive busbars include copper busbars and aluminum busbars.

[0003] Chinese patent CN116722374A describes a flat aluminum busbar structure, which involves a conductive ring at the end of the aluminum busbar body, connecting it to a wire lug. However, when the wire lug is connected to the conductive ring, excessive torque during tightening can cause deformation of the conductive ring, thereby damaging the connection between the conductive ring and the aluminum busbar body. Utility Model Content

[0004] In view of the above-mentioned defects in the prior art, the main purpose of this utility model is to overcome the shortcomings of the prior art and disclose a connection structure between conductive components, including a first conductive component, a second conductive component and an insert. The first conductive component is provided with a first connection hole, the second conductive component is stacked on the first conductive component, the insert is placed in the first connection hole, the insert is connected to the first conductive component by laser welding, and the insert is fixedly installed on the second conductive component.

[0005] Furthermore, the insert and the second conductive component are connected by one of the following methods: laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosive welding, and cold pressing.

[0006] Furthermore, the insert includes a first connecting portion, which is placed inside the first connecting hole. A first weld is formed between the first conductive component and the first connecting portion by laser welding. The first weld connects the first conductive component, the second conductive component, and the first connecting portion.

[0007] Furthermore, the insert includes a first connecting portion and a second connecting portion continuously disposed thereon, the first connecting portion being placed inside the first connecting hole, the first connecting portion and the first conductive component forming a first weld seam by laser welding, and the second connecting portion being fixed to the second conductive component.

[0008] Furthermore, the lower end face of the second connecting part is connected to the second conductive component by one of friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosive welding, and cold pressing.

[0009] Furthermore, the outer ring of the second connecting part is circular, oblong, or polygonal.

[0010] Furthermore, a second connecting hole is provided on the second conductive component, and the first connecting hole and the second connecting hole are concentrically arranged.

[0011] Furthermore, the second connecting portion is placed inside the second connecting hole, and the second conductive component and the second connecting portion form a second weld by laser welding.

[0012] Furthermore, the size of the first connecting hole is larger than the size of the second connecting hole; the first weld connects the first conductive component and the insert, or the first conductive component, the insert, and the second conductive component; the second weld connects the insert and the second conductive component. The size of the first connecting hole is smaller than the size of the second connecting hole; the first weld connects the insert and the first conductive component; the second weld connects the insert, the first conductive component, and the second conductive component. The first connecting hole has the same size as the second connecting hole. The first weld connects the insert and the first conductive component, and the second weld connects the insert and the second conductive component.

[0013] Furthermore, the center of the insert is provided with a hollow structure or a semi-hollow structure.

[0014] Furthermore, the first conductive component has a single-layer structure or a multi-layer structure.

[0015] The first conductive component is a conductive busbar or a conductive connecting plate, and the second conductive component is a conductive busbar or a conductive connecting plate.

[0016] Furthermore, when the first conductive component and the second conductive component are made of the same material, the material of the insert is the same as that of the first conductive component and the second conductive component; when the first conductive component and the second conductive component are made of different materials, the insert is made of bimetallic material, with one part of the insert being the same as that of the first conductive component and the other part being the same as that of the second conductive component.

[0017] The beneficial effects achieved by this utility model are as follows: This invention connects the first conductive component and the second conductive component by setting an insert, so that the insert has sufficient mating surface with the first conductive component and the second conductive component respectively. Through a combination of laser welding and laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosive welding and cold pressing connection, the connection strength between the first conductive component and the second conductive component is improved.

[0018] The circumferential weld seam combined with the lap joint structure ensures that only a portion of the stress generated during product operation is transferred to the weld seam, and the circumferential weld seam has a greater stress-bearing capacity than a straight weld seam. This significantly improves the connection strength between the first and second conductive components.

[0019] When friction welding and ultrasonic welding are used, the second connection part is provided by inserting an insert to effectively prevent the radial expansion of friction welding or ultrasonic welding from affecting the fit between the ultrasonic welded & laser welded joint and the first conductive component or another connection part. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the connection state between the first conductive component and the second conductive component of this utility model; Figure 2 A schematic diagram of the connection structure between a first conductive component with a connection hole and a second conductive component without a connection hole; Figure 3 A schematic diagram of the connection structure between a first conductive component with a connection hole and a second conductive component with a connection hole; Figure 4 A schematic diagram of a first welding structure where the connection hole of the first conductive component is larger than the connection hole of the second conductive component; Figure 5 A schematic diagram of a second welding structure where the connection hole of the first conductive component is larger than the connection hole of the second conductive component; Figure 6 A schematic diagram of a third welding structure where the connection hole of the first conductive component is larger than the connection hole of the second conductive component; Figure 7 A schematic diagram of a fourth welding structure where the connection hole of the first conductive component is larger than the connection hole of the second conductive component; Figure 8 A schematic diagram of the fifth welding structure used where the connection hole of the first conductive component is larger than the connection hole of the second conductive component; Figure 9 A schematic diagram of a welded structure in which the connection hole of the first conductive component is larger than the connection hole of the second conductive component and the insert is a hollow structure. Figure 10 A schematic diagram of a welding structure where the connection hole of the first conductive component is smaller than the connection hole of the second conductive component; Figure 11 A schematic diagram of a welding structure in which the connection holes of the first conductive component and the second conductive component are of the same size and the insert is a solid structure. Figure 12 A schematic diagram of a welded structure in which the connection holes of the first conductive component and the second conductive component are of the same size and the insert is a tubular structure. Figure 13 A schematic diagram of a welded structure in which the connection holes of the first conductive component and the second conductive component are of the same size and the insert is a bimetallic solid structure. Figure 14 A schematic diagram of a first welding structure where the connection hole of the first conductive component in a multilayer structure is larger than the connection hole of the second conductive component. Figure 15 A schematic diagram of a single-layer insert connected to a second conductive component via friction welding or ultrasonic welding. Figures 16-20 Schematic diagrams of various structures for a single-layer insert, including a first connecting portion; Figure 21 A schematic diagram of a double-layer insert connected to a second conductive component via friction welding or ultrasonic welding. Figures 22-28 Schematic diagrams of various structures for a double-layer insert, including a first connecting portion; The attached figures are labeled as follows: 1. First conductive component; 2. Second conductive component; 3. Insert; 4. First weld; 21. Second connecting hole; 31. First connecting part; 32. Second connecting part; 5. Second weld. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] A connection structure between conductive components includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 is provided with a first connection hole, the second conductive component 2 is stacked on the first conductive component 1, the insert 3 is placed in the first connection hole, the insert 3 is connected to the first conductive component 1 by laser welding, and the insert 3 is fixedly installed on the second conductive component 2.

[0023] The insert 3 and the second conductive component 2 are connected by one of the following methods: laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosive welding, and cold pressing.

[0024] Example 1

[0025] A connection structure between conductive components, such as Figures 1-2As shown, the device includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 has a first connecting hole and is a single-layer structure. The insert 3 is a solid structure and is placed inside the first connecting hole. The second conductive component 2 is stacked on the first conductive component 1 and the insert 3. Laser welding is performed around the gap between the insert 3 and the first conductive component 1. The laser welding adopts a composite welding structure of butt welding and through welding to form a first weld 4, so that the first conductive component 1, the insert 3, and the second conductive component 2 are fixedly connected by the weld.

[0026] Example 2

[0027] A connection structure between conductive components, such as Figure 3 As shown, the device includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 has a first connecting hole and is a single-layer structure. The second conductive component 2 has a second connecting hole 21. The insert 3 is a solid structure and is placed inside the first connecting hole. The second conductive component 2 is stacked on the first conductive component 1 and the insert 3. Laser welding is performed around the gap between the insert 3 and the first conductive component 1. The laser welding adopts a composite welding structure of butt welding and through welding to form a first weld 4, so that the first conductive component 1, the insert 3, and the second conductive component 2 are fixedly connected by the weld.

[0028] Example 3

[0029] A connection structure between conductive components, such as Figure 4 As shown, the device includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 has a first connecting hole and is a single-layer structure. The second conductive component 2 has a second connecting hole, the size of which is larger than that of the first connecting hole. The first conductive component 1 is stacked on the second conductive component 2. The insert 3 is a solid structure and includes a first connecting portion 31 and a second connecting portion 32 that are continuously arranged. The insert 3 has a stepped structure. The dimensions of the first connecting portion 31 and the second connecting portion 32 are respectively matched with the first connecting hole and the second connecting hole. The first connecting portion 31 is placed inside the first connecting hole, and the second connecting portion 32 is placed inside the second connecting hole. The second connecting portion 32 and the second connecting hole cooperate with each other to play a positioning role. The first conductive component 1, the second conductive component 2, and the insert 3 are laser welded to form a first weld 4, which is formed by a composite welding of butt welding and through welding.

[0030] Of course, such as Figure 5 As shown, the second connecting hole and the second connecting part 32 can also be connected by laser welding to form a second weld 5. The second weld 5 is connected by butt welding. The second weld 5 connects the second conductive part 2 and the insert 3.

[0031] Or, such as Figure 6 As shown, the first weld 4 is connected by butt welding, and the second weld 5 is connected by a combination of butt welding and through welding. The first conductive component 1 and the insert 3 are connected through the first weld 4. The second weld connects the first connecting part 31, the second connecting part 32 of the insert 3, and the second conductive component 2.

[0032] In addition, such as Figure 7 As shown, in order to further improve the connection strength between the second conductive component 2 and the first conductive component 1, the first weld 4 and the second weld 5 are both connected by a composite welding method of butt welding and through welding; that is, the first weld 4 connects the first conductive component 1, the second conductive component 2 and the insert 3, and the second weld 5 connects the first connecting part 31, the second connecting part 32 and the second conductive component 2.

[0033] like Figure 8 As shown, when the connection strength between the second conductive component 2 and the first conductive component 1 is satisfied, the first weld 4 and the second weld 5 are both laser welded by butt welding. That is, the first weld 4 connects the first conductive component 1 and the insert 3, and the second weld 5 connects the insert 3 and the second conductive component 2.

[0034] like Figure 9 As shown, insert 3 has an axially extending through hole to facilitate wire lug connection.

[0035] Preferably, the insert 3 can be a solid structure, a tubular structure, or a semi-hollow structure.

[0036] Example 4

[0037] A connection structure between conductive components, such as Figure 10 As shown, the device includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 has a first connecting hole and is a single-layer structure. The second conductive component 2 has a second connecting hole, the size of which is smaller than that of the first connecting hole. The first conductive component 1 is stacked on the second conductive component 2. The insert 3 is a solid structure and includes a first connecting portion 31 and a second connecting portion 32 that are continuously arranged. The insert 3 has a stepped structure. The dimensions of the first connecting portion 31 and the second connecting portion 32 are respectively matched with the first connecting hole and the second connecting hole. The first connecting portion 31 is placed in the first connecting hole, and the second connecting portion 32 is placed in the second connecting hole. The first conductive component 1 and the first connecting portion 31 and the second connecting portion 32 of the insert 3 form a first weld 4 by laser welding. The first conductive component 1, the insert 3, and the second conductive component 2 form a second weld 5 by laser welding. The first weld 4 and the second weld 5 are formed by a composite welding of butt welding and through welding.

[0038] Example 5

[0039] A connection structure between conductive components, such as Figure 11 As shown, the device includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 has a first connecting hole and is a single-layer structure. The second conductive component 2 has a second connecting hole, and the size of the first connecting hole is the same as that of the second connecting hole. The first conductive component 1 is stacked on the second conductive component 2. The insert 3 is a solid structure and includes a first connecting portion 31 and a second connecting portion 32 that are continuously arranged. The insert 3 has a columnar structure. The dimensions of the first connecting portion 31 and the second connecting portion 32 are respectively matched with the first connecting hole and the second connecting hole. The first connecting portion 31 is placed in the first connecting hole, and the second connecting portion 32 is placed in the second connecting hole. The first conductive component 1 and the insert 3 are laser welded to form a first weld 4, and the insert 3 and the second conductive component 2 are laser welded to form a second weld 5. The first weld 4 and the second weld 5 are formed by butt welding.

[0040] like Figure 12 As shown, a through hole is provided through the center of the insert 3, making the insert 3 have a tubular structure. The first conductive component 1 and the insert 3 are laser welded to form a first weld 4, and the insert 3 and the second conductive component 2 are laser welded to form a second weld 5. The first weld 4 and the second weld 5 are formed by butt welding.

[0041] like Figure 13 As shown, insert 3 is a bimetallic solid structure. The first connecting part 31 and the second connecting part 32 of insert 3 are made of two different materials. The first conductive component 1 and insert 3 are laser-welded to form a first weld 4. Insert 3 and the second conductive component 2 are laser-welded to form a second weld 5. The first weld 4 and the second weld 5 are formed by butt welding. To obtain better welding effect, the metals at both ends and the corresponding welded parts achieve the best mutual solubility.

[0042] Example 6

[0043] A connection structure between conductive components, such as Figure 14As shown, it includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 is provided with a first connecting hole and has a multi-layer structure. The second conductive component 2 is provided with a second connecting hole, and the size of the first connecting hole is larger than that of the second connecting hole. The first conductive component 1 is stacked on the second conductive component 2. The insert 3 is a solid structure and includes a first connecting portion 31 and a second connecting portion 32 that are continuously arranged. The insert 3 has a stepped structure. The sizes of the first connecting portion 31 and the second connecting portion 32 are respectively matched with the first connecting hole and the second connecting hole. The first connecting portion 31 is placed in the first connecting hole, and the second connecting portion 32 is placed in the second connecting hole. A second weld 5 can also be formed between the second connecting hole and the second connecting part 32 by laser welding. The first conductive component 1, the second conductive component 2, and the insert 3 are formed by laser welding to form a first weld 4. Both the first weld 4 and the second weld 5 are connected by a composite welding method of butt welding and through welding; that is, the first weld 4 connects the first conductive component 1, the second conductive component 2, and the insert 3, and the multi-layer structure of the first conductive component 1 is connected together by the first weld 4. The second weld 5 connects the first connecting part 31, the second connecting part 32, and the second conductive component 2.

[0044] Example 7

[0045] A connection structure between conductive components, such as Figure 15 As shown, the device includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 has a first connecting hole and is a single-layer structure. The insert is a solid structure. The insert 3 includes a first connecting part 31, which is placed inside the first connecting hole. The second conductive component 2 is stacked on the first conductive component 1 and the insert 3. Laser welding is performed around the gap between the insert 3 and the first conductive component 1. The laser welding adopts a composite welding structure of butt welding and penetration welding to form a first weld 4, so that the first conductive component 1, the insert 3, and the second conductive component 2 are fixedly connected by the weld. The insert 3 is fixed to the second conductive component 2 by one of the following methods: ultrasonic welding, friction welding, electromagnetic pulse welding, brazing, explosive welding, and cold pressing.

[0046] When the insert 3 is fixed to the second conductive component 2 by friction welding, such as Figure 16 As shown, insert 3 is circular; when insert 3 is fixed to the second conductive component 2 by ultrasonic welding, as... Figures 16-18 As shown, insert 3 is a circular, oblong, or polygonal structure. The polygonal structure can be a triangle, quadrilateral, pentagon, hexagon, etc.

[0047] To facilitate clamping of insert 3 during friction welding, such as Figures 19-20 As shown, the upper surface of the insert 3 is recessed with a semi-hollow structure or a hollow structure.

[0048] Example 8

[0049] A connection structure between conductive components, such as Figure 21 As shown, the device includes a first conductive component 1, a second conductive component 2, and an insert 3. The first conductive component 1 has a first connecting hole and is a single-layer structure. The insert is a solid structure. The insert 3 includes a first connecting part 31 and a second connecting part 32. The first connecting part 31 is placed in the first connecting hole. The second connecting part is fixed to the second conductive component 2 by one of the following methods: ultrasonic welding, friction welding, electromagnetic pulse welding, brazing, explosive welding, and cold pressing. The gap between the first connecting part 31 and the first conductive component 1 is laser welded. The laser welding adopts a composite welding structure of butt welding and penetration welding to form a first weld 4. The first connecting part 31, the second connecting part 32, and the first conductive component 1 are connected through the first weld 4.

[0050] The first connecting part 31 is a circular, oblong, or polygonal structure, and the polygonal structure can be a triangle, quadrilateral, pentagon, hexagon, etc. The second connecting part 32 is a circular, oblong, or polygonal structure, and the polygonal structure can be a triangle, quadrilateral, pentagon, hexagon, etc. Preferably, the polygonal part has rounded corners.

[0051] In the above embodiments, the first conductive component 1 and the second conductive component 2 are made of pure copper, copper alloy, pure aluminum, or aluminum alloy.

[0052] In the above embodiment, an electroplated layer is provided on the outside of the second conductive component 2.

[0053] In the above embodiments, the insert 3 is made of pure copper, copper alloy, pure aluminum or aluminum alloy, and an electroplating layer can be provided as needed.

[0054] In the above embodiments, when the first conductive component and the second conductive component are made of the same material, the insert is made of the same material as both the first and second conductive components. When the first conductive component and the second conductive component are made of different materials, the insert is made of a bimetallic material, with one part of the insert being the same material as the first conductive component and the other part being the same material as the second conductive component. For example, when both the first conductive component 1 and the second conductive component are copper alloys, the insert 3 is also made of copper alloy. When the first conductive component 1 is a copper alloy and the second conductive component is an aluminum alloy, the insert 3 consists of two parts: one part is a copper alloy and the other part is an aluminum alloy. The copper alloy part is connected to the first conductive component 1, and the aluminum alloy part is connected to the second conductive component 2.

[0055] In the above embodiments, the second conductive component 2 and the first conductive component 1 are provided with not only one insert 3, but also two or more, as long as the corresponding number of first connecting holes and second connecting holes are provided.

[0056] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present utility model.

Claims

1. A connection structure between conductive components, characterized in that, The device includes a first conductive component, a second conductive component, and an insert. The first conductive component has a first connection hole. The second conductive component is stacked on the first conductive component. The insert is placed in the first connection hole. The insert is connected to the first conductive component by laser welding. The insert is fixedly installed on the second conductive component.

2. The connection structure between conductive components according to claim 1, characterized in that, The insert is connected to the second conductive component by one of the following methods: laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosive welding, and cold pressing.

3. The connection structure between conductive components according to claim 1, characterized in that, The insert includes a first connecting portion, which is placed inside the first connecting hole. A first weld is formed between the first conductive component and the first connecting portion by laser welding. The first weld connects the first conductive component, the second conductive component, and the first connecting portion.

4. The connection structure between conductive components according to claim 1, characterized in that, The insert includes a first connecting portion and a second connecting portion that are continuously arranged. The first connecting portion is placed in the first connecting hole. The first connecting portion and the first conductive component are laser welded to form a first weld. The second connecting portion is fixed to the second conductive component.

5. The connection structure between conductive components according to claim 4, characterized in that, The lower end face of the second connecting part is connected to the second conductive component by one of the following methods: friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosive welding, and cold pressing.

6. The connection structure between conductive components according to claim 5, characterized in that, The outer ring of the second connecting part is circular, oblong, or polygonal.

7. The connection structure between conductive components according to claim 4, characterized in that, The second conductive component is provided with a second connection hole, and the first connection hole and the second connection hole are concentrically arranged.

8. The connection structure between conductive components according to claim 7, characterized in that, The second connecting part is placed inside the second connecting hole, and the second conductive component and the second connecting part are laser welded to form a second weld.

9. The connection structure between conductive components according to claim 8, characterized in that, The size of the first connecting hole is larger than the size of the second connecting hole, and the first weld connects the first conductive component and the insert, or the first conductive component, the insert and the second conductive component; The second weld connects the insert and the second conductive component; The size of the first connecting hole is smaller than the size of the second connecting hole. The first weld connects the insert and the first conductive component, and the second weld connects the insert, or connects the insert, the first conductive component, and the second conductive component. The first connecting hole has the same size as the second connecting hole. The first weld connects the insert and the first conductive component, and the second weld connects the insert and the second conductive component.

10. The connection structure between conductive components according to claim 1, characterized in that, The insert has a hollow or semi-hollow structure at its center.

11. The connection structure between conductive components according to claim 1, characterized in that, The first conductive component has a single-layer structure or a multi-layer structure.

12. The connection structure between conductive components according to claim 1, characterized in that, The first conductive component is a conductive busbar or a conductive connecting plate, and the second conductive component is a conductive busbar or a conductive connecting plate.

13. The connection structure between conductive components according to claim 1, characterized in that, When the first conductive component and the second conductive component are made of the same material, the insert is made of the same material as both the first and second conductive components; when the first conductive component and the second conductive component are made of different materials, the insert is made of bimetallic material, with one part of the insert being made of the same material as the first conductive component and the other part being made of the same material as the second conductive component.

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