An electrical connection terminal

Abstract

This utility model provides an electrical connection terminal, including a male terminal body made of a copper (or copper alloy) and aluminum (or aluminum alloy) composite strip. The composite material is an integral structure formed by combining copper (or copper alloy) strip and aluminum (or aluminum alloy). The copper (or copper alloy) and aluminum (or aluminum alloy) composite material used in the male terminal body of this utility model has a metallurgical-grade composite structure with strong resistance to electrochemical corrosion. The terminal welding end has flexibly set copper (or copper alloy) layer welding parts and aluminum (or aluminum alloy) layer welding parts. When welding with a copper (or copper alloy) conductor wire, the copper (or copper alloy) layer welding part is welded to the copper (or copper alloy) conductor of the copper (or copper alloy) wire; when welding with an aluminum (or aluminum alloy) conductor wire, the aluminum (or aluminum alloy) layer welding part is welded to the aluminum (or aluminum alloy) conductor of the aluminum (or aluminum alloy) wire. This welding between the same metals provides strong resistance to electrochemical corrosion.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection technology, specifically to an electrical connection terminal. Background Technology

[0002] Currently, the male electrical connector body and the wire are connected using a soldering process. To reduce costs while maintaining good power and signal transmission performance, the male electrical connector body and the wire are made of different metals; for example, the terminal is made of copper (or a copper alloy), and the conductor of the wire is made of aluminum (or an aluminum alloy).

[0003] When gaps exist between different metals, and these gaps contain electrolytes such as moisture or other impurities, a galvanic cell reaction can easily form between copper (or copper alloy) and aluminum (or aluminum alloy) due to the presence of electrolytes (micro-droplets and other diffusers in the environment), corroding the copper-aluminum interface. For example, after welding copper (or copper alloy) and aluminum (or aluminum alloy), the welded area is prone to electrochemical corrosion, which is detrimental to long-term stable use.

[0004] The existing semi-molten rolling composite process for copper (or copper alloy) aluminum (or aluminum alloy) composites uses aluminum (or aluminum alloy) ingots and copper (or copper alloy) plates and strips as raw materials. The copper (or copper alloy) and aluminum (or aluminum alloy) reach a semi-molten state during the composite process, achieving 100% metallurgical composite of copper (or copper alloy) and aluminum (or aluminum alloy). The process is carried out under high temperature, high pressure, and oxygen-free conditions, which solves the problem of oxidation of copper (or copper alloy) and aluminum (or aluminum alloy) during the composite process. It meets the precise requirements of thermal penetration composite temperature and time between the two metals, controls the formation and expansion of the eutectic layer, and results in high composite strength of copper (or copper alloy) and aluminum (or aluminum alloy).

[0005] Therefore, this patented technology addresses the need to explore how to apply copper (or copper alloy) and aluminum (or aluminum alloy) metallurgically composite materials to electrical connections, achieving good conductivity while avoiding electrochemical corrosion at the welding points. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an electrical connection terminal with the advantages of a conductive outer layer with good conductivity and strong resistance to electrochemical corrosion between multiple metal layers.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An electrical connection terminal includes a male terminal body, characterized in that: the substrate of the male terminal body is an integral structure composed of copper or copper alloy and aluminum or aluminum alloy, and the upper and lower sides of the plug-in connection end of the male terminal body are respectively provided with composite copper or copper alloy layers.

[0009] The electrical connection terminal described above is characterized in that: the terminal welding end of the male terminal body is a double-layer structure composed of a copper or copper alloy layer and an aluminum or aluminum alloy layer.

[0010] An electrical connection terminal as described above is characterized in that: a wire is welded to the terminal welding end on the male terminal body, the wire conductor is made of copper or copper alloy, and the wire conductor is welded to the copper or copper alloy layer of the terminal welding end.

[0011] An electrical connection terminal as described above is characterized in that: a wire is welded to the terminal welding end on the male terminal body, the wire conductor is made of aluminum or aluminum alloy, and the wire conductor is welded to the aluminum or aluminum alloy layer of the terminal welding end.

[0012] An electrical connection terminal as described above is characterized in that: the terminal welding end of the male terminal body is a single-layer structure of aluminum or aluminum alloy, and a wire is welded to the terminal welding end on the male terminal body. The conductor of the wire is made of aluminum or aluminum alloy, and the conductor of the wire is welded to the aluminum or aluminum alloy layer on the terminal welding end.

[0013] An electrical connection terminal as described above is characterized in that: it further includes a metal sleeve, one end of which is provided with a fixing structure for holding the male terminal body, and the other end of which is provided with a wire fixing structure for fixing the wire. At the middle position of the metal sleeve, the welding end of the terminal and the wire conductor at one end of the wire placed inside the metal sleeve are welded together.

[0014] The electrical connection terminal described above is characterized in that: the copper or copper alloy layer has an electroplated layer on the contact area side.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects: the copper (or copper alloy) aluminum (or aluminum alloy) composite material used in the male terminal body has a metallurgical-grade composite structure with strong resistance to electrochemical corrosion. The terminal welding end has a flexible copper (or copper alloy) layer welding part and an aluminum (or aluminum alloy) layer welding part. When welding with copper (or copper alloy) conductor wires, the copper (or copper alloy) layer welding part is welded to the copper (or copper alloy) conductor of the copper (or copper alloy) wire; when welding with aluminum (or aluminum alloy) conductor wires, the aluminum (or aluminum alloy) layer welding part is welded to the aluminum (or aluminum alloy) conductor of the aluminum (or aluminum alloy) wire. The welding between the same metals has strong resistance to electrochemical corrosion. Attached Figure Description

[0016] Figure 1 This is one of the three-dimensional structural schematic diagrams of Embodiment 1 of this utility model;

[0017] Figure 2 This is the second three-dimensional structural schematic diagram of Embodiment 1 of this utility model;

[0018] Figure 3 This is a schematic diagram showing the disassembled structure of Embodiment 1 of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0020] Figure 5 This is a schematic diagram of the disassembled structure of Embodiment 2 of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the present invention in conjunction with a flat wire in Embodiment 3;

[0022] Figure 7 for Figure 6 Schematic diagram of the partially disassembled structure

[0023] Figure 8 This is a schematic diagram of the structure of the present invention in conjunction with a cylindrical wire in Embodiment 3;

[0024] Figure 9 for Figure 8 A schematic diagram of the disassembled structure.

[0025] in:

[0026] 1-Male terminal body; 11-Terminal soldering end; 12-Plug-in connection end; 121-Aluminum layer; 122-Copper layer;

[0027] 2-Metal sleeve; 201-Conductor fixing structure; 202-Wire fixing structure; 203-Terminal soldering area; 21-Crimping edge; 22-Clip block; 23-Crimping wing; 41-Flat wire; 410-Flat conductor; 411-Flat insulation; 42-Cylindrical wire; 420-Cylindrical conductor; 421-Cylindrical insulation. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] like Figures 1-9 Examples 1, 2, and 3 are shown.

[0030] An electrical connection terminal includes a male terminal body 1, a metal sleeve 2, and a wire.

[0031] The male terminal body 1 is an integral structure made of copper strip and aluminum composite. One end of the male terminal body 1 is a terminal welding end 11, which is a double-layer structure composed of copper layer 122 and aluminum layer 121. The other end of the male terminal body 1 is a plug-in connection end 12, which has a copper layer 122 on the upper and lower sides of the middle aluminum layer 121.

[0032] In this application, the metallurgical composite process of copper (or copper alloy) strip and semi-molten aluminum (or aluminum alloy) is prior art and will not be discussed in detail here.

[0033] like Figures 1-5 Examples 1 and 2 are shown.

[0034] One of the technological innovations of this application is that the front part of the double-layer metal strip, which is composed of copper strip and semi-molten aluminum, is bent to form a plug-in connection end 12 with an aluminum layer 121 in the middle and copper layers 122 on the top and bottom.

[0035] The second technological innovation of this application lies in the fact that the tail end of the double-layer metal strip made of copper strip and aluminum is directly used as the terminal welding end 11.

[0036] like Figure 1-3 As shown, the front of the metallurgically composite double-layer structure is bent backward to form a plug-in connection end 12 with a double aluminum layer 121 in the middle and copper layers 122 on the top and bottom. Figure 4-5 As shown, the metallurgically composite double-layer structure is bent from one side to the other to form a plug-in connection end 12 with a double aluminum layer 121 in the middle and copper layers 122 on the top and bottom sides.

[0037] In this application, the metal sleeve 2 has a conductor fixing structure 201 at one end, an wire fixing structure 202 at the other end, and a terminal soldering area 203 in the middle.

[0038] The male terminal body 1 is partially placed inside the metal sleeve 2. One end of the metal sleeve 2 is provided with a conductor fixing structure 201 for fixing the male terminal body 1, and the other end is provided with a wire fixing structure 202 for fixing the wire, located in the middle of the metal sleeve 2. The terminal welding end 11 and the flat wire 41 or cylindrical wire 42 are welded to one end placed inside the metal sleeve 2.

[0039] In this application, the conductor fixing structure 201 is as follows: a pressing edge 21 and a locking block 22 are sequentially arranged on the metal sleeve 2 along the axial direction. The pressing edge 21 is pressed tightly against the male terminal body 1 by bending inward, and the locking block 22 protrudes towards the center and is squeezed into the male terminal body 1 to form a concave-convex locking fit.

[0040] In this application, the wire fixing structure 202 is as follows: the metal sleeve 2 has multiple crimping wings 23 at its tail for crimping the wire, and the crimping is located on the insulation section of the wire.

[0041] In this application, one end of the male terminal body 1 is a terminal welding end 11, which is located at the terminal welding area 203 of the metal sleeve 2. The terminal welding end 11 includes a metallurgically composite copper layer 122 and an aluminum layer 121. It is placed inside the metal sleeve 2 by a 180-degree flip structure along the long side of the male terminal body 1, so that one of the copper layer 122 and the aluminum layer 121 faces outwards for welding. Welding methods include laser welding, ultrasonic welding, and brazing. Welding is an atomic and molecular-level bonding between conductors, resulting in lower resistance and greater reliability than conventional crimping. In practical use, depending on the material of the wire conductor, one of the copper layer 122 and the aluminum layer 121 is selected to face outwards for welding.

[0042] In this application, the contact area between the copper layer 122 and the female terminal for plugging and unplugging is plated, for example, nickel plating followed by tin plating, nickel plating followed by silver plating, nickel plating followed by gold plating, etc. Plating other materials on the copper surface is prior art and will not be discussed in detail.

[0043] In this embodiment, copper layer 122 can be replaced by a copper alloy layer, and aluminum layer 121 can be replaced by an aluminum alloy layer. In actual use, depending on whether the wire conductor is made of copper or aluminum, one of the copper or aluminum layers at the terminal welding end is selected to face outwards for welding.

[0044] like Figures 6-9 The third embodiment shown has one of the technical innovations: a three-layer structure is formed by combining copper strip and aluminum to form a plug-in connection end 12 with an aluminum layer 121 in the middle and copper layers 122 on the top and bottom.

[0045] The second technological innovation of Embodiment 3 is that the tail formed by extending the aluminum layer 121 outward is directly used as the terminal welding end 11.

[0046] In this application, the metal sleeve 2, as described in Embodiment 1 and Embodiment 2, has a conductor fixing structure 201 at one end, an wire fixing structure 202 at the other end, and a terminal soldering area 203 in the middle.

[0047] At the middle of the metal sleeve 2, the terminal welding end 11 and the flat conductor 410 of the flat wire 41 or the cylindrical conductor 420 of the cylindrical wire 42 are welded to one end inside the metal sleeve 2. The tail of the metal sleeve 2 is provided with multiple crimping wings 23 for crimping wires, crimping the flat insulation 411 section of the flat wire 41 or the cylindrical insulation 421 section of the cylindrical wire 42.

[0048] In Example 3, copper layer 122 can be replaced by a copper alloy layer, and aluminum layer 121 can be replaced by an aluminum alloy layer. In actual use, the material of the wire conductor is either copper or aluminum.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrical connection terminal, comprising a male terminal body (1), characterized in that: The base material of the male terminal body (1) is an integral structure composed of copper or copper alloy and aluminum or aluminum alloy. The upper and lower sides of the plug-in connection end (12) of the male terminal body (1) are respectively composed of copper or copper alloy layers.

2. An electrical connection terminal according to claim 1, characterized in that: The terminal welding end (11) of the male terminal body (1) is a double-layer structure composed of a copper or copper alloy layer and an aluminum or aluminum alloy layer.

3. An electrical connection terminal according to claim 2, characterized in that: The terminal welding end (11) on the male terminal body (1) is welded with an electric wire. The material of the electric wire conductor is copper or copper alloy. The electric wire conductor is welded to the copper or copper alloy layer on the terminal welding end (11).

4. An electrical connection terminal according to claim 2, characterized in that: The terminal welding end (11) on the male terminal body (1) is welded with a wire. The wire conductor is made of aluminum or aluminum alloy and is welded to the aluminum or aluminum alloy layer on the terminal welding end (11).

5. An electrical connection terminal according to claim 1, characterized in that: The terminal welding end (11) of the male terminal body (1) is a single-layer structure of aluminum or aluminum alloy. The terminal welding end (11) on the male terminal body (1) is welded with a wire, and the conductor of the wire is made of aluminum or aluminum alloy.

6. An electrical connection terminal according to claim 3, 4, or 5, characterized in that: It also includes a metal sleeve (2), one end of which is provided with a conductor fixing structure (201) for holding the male terminal body (1), and the other end is provided with a wire fixing structure (202) for fixing the wire. At the middle position of the metal sleeve (2), the terminal welding end (11) and the conductor of the wire placed inside the metal sleeve (2) are welded together.

7. An electrical connection terminal according to claim 1, characterized in that: The contact area of ​​the plug-in connection has an electroplated layer.

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