Connecting structure between conductive parts

Abstract

The invention discloses a connecting structure between conductive parts, which comprises a first conductive part, a second conductive part and an insert, the first conductive part is provided with a first connecting hole, the second conductive part is stacked on the first conductive part, the insert is arranged in the first connecting hole, and the insert is connected with the first conductive part through laser welding. And the insert is fixedly mounted on the second conductive component. The first conductive part and the second conductive part are connected through the insert, so that the insert and the first conductive part as well as the insert and the second conductive part obtain enough butt joint surfaces, and a combined connection structure of laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosive welding and cold pressing connection is adopted; and the connection strength of the first conductive part and the second conductive part is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of first conductive components, in particular to a connecting structure between conductive components. BACKGROUND

[0002] In recent years, the automobile industry has developed rapidly with the improvement of economy and the national living standard. Among them, the busbar is a kind of conductor second conductive component needed to be used in the automobile. The commonly used busbar includes copper busbar and aluminum busbar.

[0003] A kind of flat aluminum bar structure is disclosed in Chinese patent CN116722374A, which discloses that an electrically conductive ring is arranged at the end of the aluminum bar body, and the electrically conductive ring is connected with the wire nose. However, when the wire nose is connected with the electrically conductive ring, the torque is too large when tightening, which causes the deformation of the electrically conductive ring, and further damages the connection between the electrically conductive ring and the aluminum bar body. SUMMARY

[0004] In view of the defects of the prior art, the main purpose of the present application is to overcome the shortcomings of the prior art, and a connecting structure between conductive components is disclosed, which comprises a first conductive component, a second conductive component and an insert. The first conductive component is provided with a first connecting hole, the second conductive component is stacked on the first conductive component, the insert is arranged in the first connecting hole, the insert and the first conductive component are connected by laser welding, and the insert is fixedly installed on the second conductive component.

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

[0006] Further, the insert comprises a first connecting part, the first connecting part is arranged in the first connecting hole, and the first connecting part and the first conductive component are connected by laser welding to form a first weld seam, and the first weld seam connects the first conductive component, the second conductive component and the first connecting part.

[0007] Further, the insert comprises a first connecting part and a second connecting part arranged in series, the first connecting part is arranged in the first connecting hole, the first connecting part and the first conductive component are connected by laser welding to form a first weld seam, and the second connecting part is fixed with the second conductive component.

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

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

[0010] Further, a second connecting hole is arranged on the second conductive part, and the first connecting hole and the second connecting hole are concentrically arranged.

[0011] Further, the second connecting part is arranged in the second connecting hole, and the second conductive part and the second connecting part are connected by laser welding to form a second welding seam.

[0012] Further, the size of the first connecting hole is larger than the size of the second connecting hole, the first welding seam connects the first conductive part and the insert, or the first conductive part, the insert and the second conductive part; and the second welding seam connects the insert and the second conductive part.

[0013] The size of the first connecting hole is smaller than the size of the second connecting hole, the first welding seam connects the insert and the first conductive part, and the second welding seam connects the insert, the first conductive part and the second conductive part.

[0014] The size of the first connecting hole is the same as the size of the second connecting hole, the first welding seam connects the insert and the first conductive part, and the second welding seam connects the insert and the second conductive part.

[0015] Further, the insert is provided with a hollow structure or a semi-hollow structure at the center.

[0016] Further, the first conductive part is a single-layer structure or a multi-layer structure.

[0017] The first conductive part is a conductive row or a conductive connecting plate, and the second conductive part is a conductive row or a conductive connecting plate.

[0018] 13. The connecting structure between the conductive parts according to claim 1, wherein when the first conductive part and the second conductive part are of the same type, the insert is of the same type as the first conductive part and the second conductive part; and when the first conductive part and the second conductive part are of different types, the insert is of a bimetallic type, a part of the insert is of the same type as the first conductive part, and another part of the insert is of the same type as the second conductive part.

[0019] The present application has the following beneficial effects:

[0020] The present application connects the first conductive part and the second conductive part by arranging the insert, so that the insert has sufficient butt surfaces with the first conductive part and the second conductive part, and the first conductive part and the second conductive part are connected by a combined connecting structure of laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosion welding and cold pressing, thereby improving the connecting strength of the first conductive part and the second conductive part.

[0021] The ring-shaped welding seam cooperates with the lap joint structure, so that only part of the stress generated during the operation of the product is transmitted to the welding seam, and the ring-shaped welding seam has greater stress bearing capacity than the linear welding seam. The connection strength between the first conductive part and the second conductive part is greatly improved.

[0022] When friction welding and ultrasonic welding are adopted, the second connecting part is arranged by the insert, so that the radial expansion of the friction welding or ultrasonic welding effectively prevents the ultrasonic welding and laser welding combination part from affecting the cooperation of the first conductive part or another connecting part. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the connection state of the first conductive part and the second conductive part of the application;

[0024] Figure 2 It is a schematic diagram of the connection structure of the first conductive part with the connecting hole and the second conductive part without the connecting hole;

[0025] Figure 3 It is a schematic diagram of the connection structure of the first conductive part with the connecting hole and the second conductive part with the connecting hole;

[0026] Figure 4 It is a schematic diagram of the first welding structure adopted when the connecting hole of the first conductive part is larger than the connecting hole of the second conductive part;

[0027] Figure 5 It is a schematic diagram of the second welding structure adopted when the connecting hole of the first conductive part is larger than the connecting hole of the second conductive part;

[0028] Figure 6 It is a schematic diagram of the third welding structure adopted when the connecting hole of the first conductive part is larger than the connecting hole of the second conductive part;

[0029] Figure 7 It is a schematic diagram of the fourth welding structure adopted when the connecting hole of the first conductive part is larger than the connecting hole of the second conductive part;

[0030] Figure 8 It is a schematic diagram of the fifth welding structure adopted when the connecting hole of the first conductive part is larger than the connecting hole of the second conductive part;

[0031] Figure 9 It is a schematic diagram of the welding structure when the connecting hole of the first conductive part is larger than the connecting hole of the second conductive part and the insert is a hollow structure;

[0032] Figure 10 It is a schematic diagram of the welding structure when the connecting hole of the first conductive part is smaller than the connecting hole of the second conductive part;

[0033] Figure 11 A schematic diagram of a welding structure in which the connecting hole of the first conductive part and the connecting hole of the second conductive part are of the same size and the insert is of a solid structure;

[0034] Figure 12 A schematic diagram of a welding structure in which the connecting hole of the first conductive part and the connecting hole of the second conductive part are of the same size and the insert is of a tubular structure;

[0035] Figure 13 A schematic diagram of a welding structure in which the connecting hole of the first conductive part and the connecting hole of the second conductive part are of the same size and the insert is of a bimetallic solid structure;

[0036] Figure 14 A schematic diagram of a welding structure in which the connecting hole of the first conductive part is larger than the connecting hole of the second conductive part and a first type of welding structure is used;

[0037] Figure 15 A schematic diagram of a connecting structure in which a single-layer insert is connected to the second conductive part by friction welding or ultrasonic welding;

[0038] Figures 16-20 A schematic diagram of various structures of a single-layer insert including a first connecting part;

[0039] Figure 21 A schematic diagram of a connecting structure in which a double-layer insert is connected to the second conductive part by friction welding or ultrasonic welding;

[0040] Figures 22-28 A schematic diagram of various structures of a double-layer insert including a first connecting part;

[0041] The reference signs are as follows:

[0042] 1. first conductive part, 2. second conductive part, 3. insert, 4. first weld, 21. second connecting hole, 31. first connecting part, 32. second connecting part, 5. second weld. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0044] A connecting structure between conductive parts, comprising a first conductive part 1, a second conductive part 2 and an insert 3, a first connecting hole is provided on the first conductive part 1, the second conductive part 2 is stacked on the first conductive part 1, the insert 3 is placed in the first connecting hole, the insert 3 is connected to the first conductive part 1 by laser welding, and the insert 3 is fixedly installed on the second conductive part 2.

[0045] 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.

[0046] Example 1

[0047] A connection structure between conductive components, such as Figures 1-2 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 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.

[0048] Example 2

[0049] 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.

[0050] Example 3

[0051] 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.

[0052] Of course, as Figure 5 shown, the second connecting hole and the second connecting part 32 can also be connected by laser welding to form a second weld 5, which is connected by butt welding, and the second weld 5 connects the second conductive part 2 and the insert 3.

[0053] Alternatively, as Figure 6 shown, the first weld 4 is connected by butt welding, the second weld 5 is connected by butt welding and penetration welding, and the first conductive part 1 and the insert 3 are further connected by the first weld 4. The second weld connects the first connecting part 31, the second connecting part 32 and the second conductive part 2 of the insert 3.

[0054] In addition, as Figure 7 shown, in order to further improve the connection strength between the second conductive part 2 and the first conductive part 1, the first weld 4 and the second weld 5 are connected by composite welding of butt welding and penetration welding; that is, the first weld 4 connects the first conductive part 1, the second conductive part 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 part 2.

[0055] As Figure 8 shown, when the connection strength between the second conductive part 2 and the first conductive part 1 meets the requirements, the first weld 4 and the second weld 5 are connected by butt welding, that is, the first weld 4 connects the first conductive part 1 and the insert 3, and the second weld 5 connects the insert 3 and the second conductive part 2.

[0056] As Figure 9 shown, the insert 3 is provided with an axial through hole to facilitate the connection of the wire nose.

[0057] Preferably, the insert 3 can be a solid structure, a tubular structure or a semi-hollow structure.

[0058] Example 4

[0059] A connecting structure between conductive parts, as Figure 10As 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.

[0060] Example 5

[0061] 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.

[0062] 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.

[0063] like Figure 13As 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.

[0064] Example 6

[0065] A connection structure between conductive components, such as Figure 14 As 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.

[0066] Example 7

[0067] 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.

[0068] When the insert 3 is fixed with the second conductive component 2 by friction welding, as shown in Figure 16 the insert 3 is circular; when the insert 3 is fixed with the second conductive component 2 by ultrasonic welding, as shown in Figures 16-18 the insert 3 is circular, oblong or polygonal structure, and the polygonal structure can be triangular, quadrilateral, pentagonal, hexagonal, etc.

[0069] In order to facilitate the clamping of the insert 3 during friction welding, as shown in Figures 19-20 the upper surface of the insert 3 is recessed with a semi-hollow structure or a hollow structure.

[0070] Embodiment 8

[0071] A connecting structure between conductive components, as shown in Figure 21 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, the first conductive component 1 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 with the second conductive component 2 by one of ultrasonic welding, friction welding, electromagnetic pulse welding, brazing, explosive welding and cold pressing connection, 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, forming a first weld 4, and the first connecting part 31, the second connecting part 32 and the first conductive component 1 are connected through the first weld 4.

[0072] In the above embodiment, the first connecting part 31 is circular, oblong or polygonal structure, and the polygonal structure can be triangular, quadrilateral, pentagonal, hexagonal, etc. The second connecting part 32 is circular, oblong or polygonal structure, and the polygonal structure can be triangular, quadrilateral, pentagonal, hexagonal, etc. Preferably, the polygonal structure is rounded.

[0073] In the above embodiment, the material of the first conductive component 1 and the second conductive component 2 is pure copper, copper alloy, pure aluminum or aluminum alloy.

[0074] In the above embodiment, the second conductive component 2 is provided with an electroplated layer outside.

[0075] In the above embodiment, the material of the insert 3 is pure copper, copper alloy, pure aluminum or aluminum alloy, and an electroplated layer can be provided according to requirements.

[0076] In the above embodiment, when the first conductive component and the second conductive component are of the same material, the material of the insert is of the same material as the first conductive component and the second conductive component; when the first conductive component and the second conductive component are of different materials, the insert is of bimetallic material, one part of the insert is of the same material as the first conductive component, and the other part is of the same material as the second conductive component. For example, when the first conductive component 1 and the second conductive component are both of copper alloy, the insert 3 is also of copper alloy. When the first conductive component 1 is of copper alloy and the second conductive component is of aluminum alloy, the insert 3 is composed of two parts, one part is of copper alloy and the other part is of aluminum alloy, the part of copper alloy is connected with the first conductive component 1, and the part of aluminum alloy is connected with the second conductive component 2.

[0077] In the above embodiment, the number of the insert 3 between the second conductive component 2 and the first conductive component 1 is not limited to one, and can be two or even more, as long as the corresponding first connecting hole and second connecting hole are provided.

[0078] The above are only preferred embodiments of the present application, and are not intended to limit the scope of the present application; if the present application is modified or replaced without departing from the spirit and scope of the present application, it should be covered in the protection scope of the claims of the present application.

Claims

1. A connection structure between electrically conductive members, characterized by, The first conductive part, the second conductive part and the insert are provided, the first connecting hole is arranged on the first conductive part, the second conductive part is stacked on the first conductive part, the insert is arranged in the first connecting hole, the insert is connected with the first conductive part by laser welding, and the insert is fixedly arranged on the second conductive part.

2. The connecting structure between electrically conductive members according to claim 1, wherein The insert is connected with the second conductive part by laser welding, friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosion welding and cold pressing.

3. The connecting structure between conductive members according to claim 1, wherein The insert comprises a first connecting part arranged in the first connecting hole, and a first weld joint is formed between the first connecting part and the first conductive part by laser welding, and the first weld joint connects the first conductive part, the second conductive part and the first connecting part.

4. The connecting structure between conductive members according to claim 1, wherein The insert comprises a first connecting part arranged in the first connecting hole, and a first weld joint is formed between the first connecting part and the first conductive part by laser welding, and the first weld joint connects the first conductive part, the second conductive part and the first connecting part.

5. The connecting structure between electrically conductive members according to claim 4, wherein The insert comprises a first connecting part arranged in the first connecting hole, and a first weld joint is formed between the first connecting part and the first conductive part by laser welding, and the first weld joint connects the first conductive part, the second conductive part and the first connecting part.

6. The connecting structure between electrically conductive members according to claim 5, wherein The lower end surface of the second connecting part is connected with the second conductive part by one of friction welding, ultrasonic welding, electromagnetic pulse welding, brazing, explosion welding and cold pressing.

7. The connecting structure between conductive members according to claim 4, wherein The outer wheel of the second connecting part is circular, oblong or polygonal.

8. The connecting structure between electrically conductive members according to claim 7, wherein The second connecting hole is arranged on the second conductive part, and the first connecting hole and the second connecting hole are concentrically arranged.

9. The connecting structure between conductive members according to claim 8, wherein The second connecting part is arranged in the second connecting hole, and a second weld joint is formed between the second conductive part and the second connecting part by laser welding. The size of the first connecting hole is greater than the size of the second connecting hole, the first weld joint connects the first conductive part and the insert, or the first conductive part, the insert and the second conductive part; The second weld joint connects the insert and the second conductive part; The size of the first connecting hole is smaller than the size of the second connecting hole, the first weld joint connects the insert and the first conductive part, the second weld joint connects the insert, or connects the insert, the first conductive part and the second conductive part; 10. The connecting structure between conductive members according to claim 1, wherein The size of the first connecting hole is the same as the size of the second connecting hole, the first weld joint connects the insert and the first conductive part, and the second weld joint connects the insert and the second conductive part.

11. The connecting structure between conductive members according to claim 1, wherein The center of the insert is provided with a hollow structure or a semi-hollow structure.

12. The connecting structure between conductive members according to claim 1, wherein The first conductive part is a single-layer structure or a multi-layer structure.

13. The connecting structure between conductive members according to claim 1, wherein The first conductive part is a conductive row or a conductive connecting plate, and the second conductive part is a conductive row or a conductive connecting plate. When the materials of the first conductive part and the second conductive part are the same, the material of the insert belongs to the same material as the materials of the first conductive part and the second conductive part; when the materials of the first conductive part and the second conductive part are different, the insert is a bimetallic material, a part of the insert is of the same material as the first conductive part, and another part is of the same material as the second conductive part.

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