Copper-aluminum composite terminal applied to photovoltaic connector

Abstract

The copper-aluminum composite terminal applied to the photovoltaic connector comprises a composite terminal body and a connecting cable, the composite terminal body is composed of a terminal butt joint section and a riveting section, and the connection position of the terminal butt joint section and the riveting section is fixedly connected through an inlay structure. The terminal butting section comprises a cylindrical butting section and a conical connecting section, the riveting section comprises a retaining section close to the terminal butting section and a riveting core section far away from the terminal butting section, the riveting core section is connected with the retaining section through a transition section, and the riveting core section wraps the end part of a connecting cable and is riveted and fixed. According to the utility model, the surface of the copper terminal is coated with aluminum or the copper and the aluminum are combined to be riveted with the aluminum wire, so that the influence on the overall performance caused by corrosion of materials due to metal potential difference caused by riveting of the copper and the aluminum is avoided, the usage amount of copper materials is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic connectors, in particular to a copper-aluminum composite terminal applied to photovoltaic connectors. Background Art

[0002] At present, most photovoltaic connectors on the market use copper as the main material. As the price of copper rises sharply, the price of copper cables also rises. Aluminum has become a commonly used cable material due to its advantages such as easy availability, light weight and easy transportation. Therefore, aluminum cables can be used to achieve electrical connection between photovoltaic panels and photovoltaic inverters. However, since the copper connector and aluminum cable cannot be directly connected, when the aluminum wire and the copper wire are directly connected, a potential difference is generated between the different metal materials, causing electrochemical corrosion of the aluminum wire, which not only poses a safety hazard, but also affects the electrical connection. If the cable uses copper conductors, the overall cost will be high and the product will lack competitiveness. Utility Model Content

[0003] In accordance with the above technical problems to be solved, a copper-aluminum composite terminal for use in a photovoltaic connector is provided.

[0004] To achieve the above-mentioned purpose, the utility model discloses a copper-aluminum composite terminal for use in a photovoltaic connector, comprising a composite terminal body and a connecting cable, wherein the composite terminal body is composed of a terminal docking section and a riveted section, and the connecting position of the terminal docking section and the riveted section is fixedly connected by an inlay structure, the terminal docking section comprises a cylindrical plug-in section and a conical connecting section, the riveted section comprises a stop section close to the terminal docking section and a rivet wire core section away from the terminal docking section, the rivet wire core section and the stop section are connected by a transition section, and the rivet wire core section wraps around the end of the connecting cable and is riveted fixed.

[0005] Furthermore, the terminal butt joint section and the riveted section are split structures, the terminal butt joint section is made of copper, and the riveted section is made of aluminum.

[0006] Furthermore, the connecting section and the stop section are interference fit, and the stop section is embedded and fixed on the connecting section.

[0007] Furthermore, the stop section is provided with circumferentially distributed stop blocks, the stop blocks are formed by single-side cutting by stamping, and the stop section cooperates with the connector housing to form a stop structure.

[0008] Furthermore, the terminal butt joint section and the riveted section are an integrated structure, both of which are made of copper, wherein the surface of the riveted section is covered with aluminum, and the thickness of the aluminum covering is ≥0.05 mm.

[0009] Furthermore, a first aluminum coating layer is provided on a side of the riveted section close to the aluminum wire core.

[0010] Furthermore, a first aluminum coating layer is provided on a side of the riveted section close to the aluminum wire core, and a second aluminum coating layer is provided on a side of the riveted section away from the aluminum wire core.

[0011] Furthermore, after the wire sheath is removed from the end of the connecting cable, a section of aluminum wire core is exposed, and the aluminum wire core is fixed to the riveted wire core section.

[0012] Furthermore, the rivet wire core segment is in an open arc shape, and the rivet wire core segment has rivet pressing edges extending from both sides of the axis of the composite terminal body.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses a copper-aluminum composite terminal used for photovoltaic connectors, which adopts the method of coating the surface of the copper terminal with aluminum or combining copper and aluminum for riveting with aluminum wire, thus avoiding the metal potential difference caused by the riveting of copper and aluminum, which causes corrosion of the material and affects the overall performance, reduces the use of copper materials, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the composite terminal body of the first embodiment of the utility model.

[0017] Figure 3 This is a cross-sectional view of the composite terminal body of the first embodiment of the utility model.

[0018] Figure 4 This is a structural schematic diagram of the second embodiment of the present utility model.

[0019] Figure 5 This is a schematic diagram of fixing the aluminum wire core in Embodiment 1 and Embodiment 2 of the present utility model.

[0020] Figure 6 This is a structural schematic diagram of embodiment 3 of the present utility model.

[0021] Figure 7 This is a schematic diagram of fixing the aluminum wire core in Embodiment 3 of the present utility model.

[0022] In the figure: 1 is a composite terminal body; 11 is a terminal docking section; 111 is an inserting section; 112 is a connecting section; 12 is a riveting section; 121 is a riveted wire core section; 122 is a stop section; 123 is a transition section; 124 is a stop section; 125 is a first aluminum coating; 126 is a second aluminum coating; 2 is a connecting cable; 21 is an aluminum wire core. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0024] Embodiment 1 of the present utility model, as Figure 1 , Figure 2 and Figure 3 As shown, it includes a composite terminal body 1 and a connecting cable 2 arranged in a connector housing. The composite terminal body 1 is composed of a terminal butt section 11 made of copper and a riveted section 12 made of aluminum. The connection position of the terminal butt section 11 and the riveted section 12 is fixedly connected by an inlay structure. The riveted section 12 includes a stop section 122 close to the terminal butt section 11 and a rivet wire core section 121 away from the terminal butt section 11. The rivet wire core section 121 and the stop section 122 are connected by a transition section 123. The rivet wire core section 121 wraps around the end of the connecting cable 2 and is riveted and fixed. During the connection process, a pin is provided in the connector housing and inserted into the terminal docking section 11 to connect with the aluminum wire core 21, wherein the exposed length of the aluminum wire core 21 does not exceed the length of the riveting section 12, to avoid the metal potential difference between copper and aluminum riveting. A copper-aluminum combination is adopted, and a pure aluminum structure is adopted at the terminal riveting point for riveting with the aluminum wire, to avoid the metal potential difference between copper and aluminum riveting causing corrosion of the material and affecting the overall performance. Compared with the current production process of copper riveting sections with aluminum or tin coating on the surface, the use of copper is reduced, further reducing the production cost.

[0025] After the wire sheath is removed from the end of the connecting cable 2, a section of aluminum wire core 21 is exposed, and the aluminum wire core 21 is fixed to the riveted wire core section 121. The aluminum riveted wire core section 121 wraps and fixes the aluminum wire core 21, providing positioning for the connecting cable 2 while preventing the aluminum wire core 21 from contacting the terminal docking section 11 of the same material.

[0026] like Figure 2 As shown, the terminal docking section 11 includes a cylindrical inserting section 111 and a conical connecting section 112. The inserting section 111 is used to provide positioning for the pin in the connector housing. The inserting section 111 and the connecting section 112 are integrally formed.

[0027] The connecting section 112 and the stop section 122 are interference fit, and the stop section 122 is embedded and fixed on the connecting section 112, which is convenient for disassembly and assembly, optimizes the production process, and saves the production cost caused by copper-aluminum welding.

[0028] The stop section 122 is provided with circumferentially distributed stop blocks 124, which are formed by single-side cutting by stamping. The stop section 122 cooperates with the connector housing to form a stop structure to prevent the connecting cable 2 from being pulled out when being pulled, thereby improving the connection strength.

[0029] The rivet wire core segment 121 is in an open arc shape, and the rivet wire core segment 121 has rivet edges extending from both sides of the axis of the composite terminal body 1 to improve the connection strength of the aluminum wire core 21 and avoid pulling and separation. Figure 5 As shown, the riveted edge is bent into a circle to cover the aluminum wire core 21 on the inside.

[0030] Embodiment 2 of the present utility model, as Figure 4 As shown, the difference from the first embodiment is that the terminal butt joint section 11 and the riveted section 12 are an integrated structure, and the terminal butt joint section 11 and the riveted section 12 are both made of copper, wherein the surface of the riveted section 12 is covered with aluminum, and the thickness of the aluminum coating is ≥0.05mm, wherein the side of the riveted section 12 close to the aluminum wire core 21 is provided with a first aluminum coating layer 125, and the first aluminum coating layer 125 is coated on the outside of the aluminum wire core 21, which is suitable for Figure 5 The riveting method shown avoids the metal potential difference caused by riveting between copper and aluminum, which may cause corrosion of the material and affect the overall performance.

[0031] Embodiment 3 of the present utility model, as Figure 6 As shown, the difference from the second embodiment is that the terminal butt joint section 11 and the riveted section 12 are an integrated structure, the terminal butt joint section 11 and the riveted section 12 are both made of copper, wherein the surface of the riveted section 12 is covered with aluminum, the thickness of the aluminum coating is ≥0.05mm, the side of the riveted section 12 close to the aluminum wire core 21 is provided with a first aluminum coating layer 125, the side of the riveted section 12 away from the aluminum wire core 21 is provided with a second aluminum coating layer 126, and both sides of the riveted section 12 are provided with aluminum coating layers, which is suitable for Figure 7 The riveting method shown avoids the metal potential difference caused by riveting between copper and aluminum, which may cause corrosion of the material and affect the overall performance.

[0032] Compared with the first embodiment, the second and third embodiments have a higher structural strength of the integrated composite terminal body 1, but the production cost of the first embodiment is lower.

[0033] Several points that need to be explained are: First, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two elements, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change; secondly, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0034] The above examples are merely illustrative of the present utility model and do not constitute a limitation on the protection scope of the present utility model. All designs that are identical or similar to the present utility model fall within the protection scope of the present utility model.

Claims

1. A copper-aluminum composite terminal for use in a photovoltaic connector, comprising a composite terminal body (1) and a connecting cable (2), characterized in that: The composite terminal body (1) is composed of a terminal docking section (11) and a riveted section (12); the terminal docking section (11) and the riveted section (12) are fixedly connected at their connection positions by means of an embedded structure; the terminal docking section (11) comprises a cylindrical plug-in section (111) and a conical connecting section (112); the riveted section (12) comprises a stop section (122) close to the terminal docking section (11) and a rivet wire core section (121) away from the terminal docking section (11); the rivet wire core section (121) and the stop section (122) are connected by means of a transition section (123); the rivet wire core section (121) wraps around the end of the connecting cable (2) and is fixed by rivets.

2. A copper-aluminum composite terminal for photovoltaic connectors according to claim 1, characterized in that: The terminal butt joint section (11) and the riveted section (12) are of a split structure; the terminal butt joint section (11) is made of copper, and the riveted section (12) is made of aluminum.

3. A copper-aluminum composite terminal for photovoltaic connectors according to claim 2, characterized in that: The connecting section (112) and the stop section (122) are interference fit, and the stop section (122) is embedded and fixed on the connecting section (112).

4. A copper-aluminum composite terminal for photovoltaic connectors according to claim 3, characterized in that: The stop section (122) is provided with circumferentially distributed stop blocks (124); the stop blocks (124) are formed by stamping and cutting on one side; the stop section (122) cooperates with the connector housing to form a stop structure.

5. A copper-aluminum composite terminal for photovoltaic connectors according to claim 1, characterized in that: The terminal butt joint section (11) and the riveted section (12) are of an integrated structure, and both the terminal butt joint section (11) and the riveted section (12) are made of copper, wherein the surface of the riveted section (12) is coated with aluminum, and the thickness of the aluminum coating is ≥0.05 mm.

6. A copper-aluminum composite terminal for photovoltaic connectors according to claim 5, characterized in that: A first aluminum coating layer (125) is provided on one side of the riveted section (12) close to the aluminum wire core (21).

7. A copper-aluminum composite terminal for photovoltaic connectors according to claim 5, characterized in that: A first aluminum coating layer (125) is provided on a side of the riveted section (12) close to the aluminum wire core (21), and a second aluminum coating layer (126) is provided on a side of the riveted section (12) away from the aluminum wire core (21).

8. A copper-aluminum composite terminal for photovoltaic connectors according to claim 1, characterized in that: After the wire sheath is removed from the end of the connection cable (2), a section of aluminum wire core (21) is exposed, and the aluminum wire core (21) is fixed to the riveted wire core section (121).

9. A copper-aluminum composite terminal for photovoltaic connectors according to claim 1, characterized in that: The rivet wire core segment (121) is in an open arc shape, and the rivet wire core segment (121) is provided with rivet pressing edges extending from both sides of the axis of the composite terminal body (1).

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