Photovoltaic connector end based on copper-aluminum friction welding and gradient coating

Abstract

The invention discloses a photovoltaic connector end based on copper-aluminum friction welding and gradient plating, and relates to the technical field of connectors, the photovoltaic connector end comprises a male connecting plug and a female connecting plug, a copper-aluminum male terminal is arranged in the male connecting plug, a copper-aluminum female terminal is arranged in the female connecting plug, and the contact ends of the copper-aluminum male terminal and the copper-aluminum female terminal are made of copper materials. Nuts are installed at one end of the male connecting plug and one end of the female connecting plug, overheating protection assemblies are arranged in the nuts, and each overheating protection assembly comprises a plurality of sets of elastic clamping pieces which are circumferentially distributed in the corresponding nut at equal intervals. According to the invention, the automatic male terminal and the female terminal can be automatically separated at a high temperature, the possibility that the connector and the photovoltaic circuit are subjected to irreversible damage due to overheating is reduced, the reliability of the connector is improved, the reliability of the connector is improved, and the reliability of the connector is improved. Abrasion of the edge to the connecting wire is reduced, and the service life of the photovoltaic module is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, in particular to a photovoltaic connector end based on copper-aluminum friction welding and gradient plating. Background Art

[0002] Photovoltaic connectors are used to connect photovoltaic modules, leading out the positive and negative poles of the photovoltaic modules to transmit electrical energy. Photovoltaic connectors connect the positive and negative poles of the circuit through male and female connectors to form a cable path. The connector itself does not have a heat dissipation function. In particular, most of the existing photovoltaic industry is outdoor equipment, and the connector itself is also outdoors with the photovoltaic module. In hot weather conditions, the external high temperature and cable temperature can easily cause high heat failure inside the connector, and even cause damage to the entire photovoltaic module circuit, affecting the service life of the equipment. In addition, the connecting wires are directly inserted from both ends of the connector. The edges of the connector end are prone to wear and tear on the connecting wires, making the connecting wires at the edge of the connector more prone to breakage, which will also affect the safe use of the photovoltaic circuit and connector. Especially in special outdoor weather, rain and other factors adhere to the worn and broken parts of the connecting wires, which can also cause circuit failures. Summary of the Invention

[0003] The technical problem of the present invention is to provide a photovoltaic connector end based on copper-aluminum friction welding and gradient plating, so that the male terminal and the female terminal can be automatically separated at high temperature, reducing the possibility of irreversible damage to the connector and the photovoltaic circuit due to overheating, reducing the wear of the edge on the connecting wire, and improving the service life of the photovoltaic module.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a photovoltaic connector end based on copper-aluminum friction welding and gradient plating, comprising a male connector and a female connector, wherein a copper-aluminum male terminal is provided in the male connector, and a copper-aluminum female terminal is provided in the female connector, wherein the contact ends of the copper-aluminum male terminal and the copper-aluminum female terminal are made of copper, and the tail rivet wire end is made of aluminum, and the two are joined by friction welding, wherein a nut is installed at one end of the male connector and the female connector, and an overheating protection component is provided in the nut, and the overheating protection component comprises:

[0005] Elastic clamping members, wherein the elastic clamping members are provided in multiple groups and are equidistantly distributed in a circular shape within the nut, the elastic clamping members can surround and fit around the outside of the connecting wire, and the lower ends of the elastic clamping members are fixedly connected to the rivet wire ends of the copper-aluminum male terminal and the copper-aluminum female terminal;

[0006] The heat-sensitive plastic ring is annular and is arranged around the outside of the elastic clamping piece. After the heat-sensitive plastic ring expands, it can squeeze the elastic clamping piece and drive the elastic clamping piece to pull the copper-aluminum male terminal and the copper-aluminum female terminal to move toward the nut.

[0007] As a further solution of the present invention, a connecting seat is clamped in the nut, and multiple groups of mounting grooves are opened on the inner side of the connecting seat. The upper end of the elastic clamp is rotatably connected to the mounting groove through a torsion spring, and a cross partition is fixedly installed in the middle position of the elastic clamp. The parts of the elastic clamp on the upper and lower sides of the cross partition are inclined toward the middle position, and a connecting block is fixedly installed at the lower end of the elastic clamp, and the connecting block is fixedly connected to the rivet wire end of the copper-aluminum male terminal and the copper-aluminum female terminal.

[0008] As a further solution of the present invention, the male plug connector includes a nut, a plastic claw, a waterproof inner plug, a copper-aluminum male terminal and a male plastic. One end of the male plastic is threadedly connected to the nut, the plastic claw can be clamped onto the waterproof inner plug, the waterproof inner plug is filled in the nut, and the copper-aluminum male terminal is clamped in the male plastic.

[0009] As a further solution of the present invention, the female plug connector includes a nut, a plastic claw, a waterproof inner plug, a copper-aluminum female terminal and a female plastic. The copper-aluminum female terminal is clamped in the female plastic. The female plastic and the male plastic can be clamped together at one end away from the nut, and an O-ring is filled between the clamping contact surfaces.

[0010] As a further solution of the present invention, stainless steel claws are fixedly installed on the contact ends of the copper-aluminum male terminal and the copper-aluminum female terminal, and the stainless steel claws are welded on the contact ends. An internal crown spring is provided in the contact end of the copper-aluminum female terminal.

[0011] As a further solution of the present invention, the heat-sensitive plastic ring is fixedly installed in the female plastic and the male plastic respectively, and an arc groove is provided on the inner side of one end of the elastic clamping member close to the connecting seat.

[0012] As a further solution of the present invention, the copper-aluminum male terminal and the copper-aluminum female terminal are provided with three layers of plating, which are a 1.3uM thinnest nickel base layer, a 5uM thinnest copper layer in the middle, and a 5uM thinnest bright tin layer on the surface.

[0013] As a further solution of the present invention, the rivet wire ends of the copper-aluminum male terminal and the copper-aluminum female terminal are fixedly connected to the connecting wire, and the connecting wire passes through between the elastic clamping parts and is led out to the outside of the nut.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In the present invention, one end of the elastic clamping piece is connected to the rivet wire end of the copper-aluminum female terminal and the copper-aluminum male terminal. The movement of the elastic clamping piece can pull the copper-aluminum female terminal and the copper-aluminum male terminal to move. When the temperature inside the connector is high, the heat-sensitive plastic ring expands due to heat and continuously squeezes the elastic clamping piece. The squeezing can make multiple groups of elastic clamping pieces gather toward the middle and squeeze in the direction of the nut, so that the multiple groups of elastic clamping pieces change from an open state to a contracted state, and under the action of the squeezing force perpendicular to the direction of the nut, the copper-aluminum female terminal and the copper-aluminum male terminal are driven to move in the direction of the nut, thereby pulling the copper-aluminum female terminal and the copper-aluminum male terminal to separate in opposite directions, avoiding the possibility of irreversible damage to the photovoltaic circuit caused by the continued operation of the photovoltaic module in a high-temperature environment.

[0016] 2. In the present invention, the connecting wire is surrounded and clamped by multiple groups of elastic clamping members. The elastic clamping members center the connecting wire inside the nut, thereby reducing the contact between the connecting wire and the edge of the connector end, thereby reducing the wear of the connecting wire by the edge of the connector, increasing the service life of the connecting wire, avoiding the exposure of damaged connecting wires to the outside of the connector, and reducing the possibility of accidents caused by rainwater intrusion into the damaged connecting wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 Schematic diagram of the structure of the male plug terminal in the present invention;

[0020] Figure 3 Schematic diagram of the structure of the female plug terminal in the present invention;

[0021] Figure 4 Exploded view of the male and female plug connectors of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the copper-aluminum male terminal and the copper-aluminum female terminal in the present invention;

[0023] Figure 6 It is a cross-sectional view of the structure of the present invention;

[0024] Figure 7 Schematic diagram of the structure of the elastic clamping member in the present invention.

[0025] Figures: 1. Nut; 2. Waterproof inner plug; 3. Copper-aluminum male terminal; 4. Male plastic; 5. O-ring; 6. Female plastic; 7. Copper-aluminum female terminal; 8. Plastic claw; 9. Stainless steel claw; 10. Male plug connector; 11. Female plug connector; 12. Elastic clamp; 13. Heat-sensitive plastic ring; 14. Connecting seat; 15. Mounting groove; 16. Transverse partition; 17. Connecting block; 18. Inner crown spring; 19. Arc groove. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 7 The present invention provides a technical solution: a photovoltaic connector end based on copper-aluminum friction welding and gradient plating, comprising a male connector 10 and a female connector 11, wherein a copper-aluminum male terminal 3 is provided in the male connector 10, and a copper-aluminum female terminal 7 is provided in the female connector 11. The contact ends of the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 are made of copper, and the tail rivet wire ends are made of aluminum, and the two are joined by friction welding. A nut 1 is installed at one end of the male connector 10 and the female connector 11, and an overheating protection component is provided in the nut 1. The overheating protection component includes:

[0028] Elastic clamping members 12, which are provided in multiple groups and are equidistantly distributed in a circular shape within the nut 1. The elastic clamping members 12 can surround and fit around the outside of the connecting wire. The lower ends of the elastic clamping members 12 are fixedly connected to the rivet wire ends of the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7;

[0029] The thermosensitive plastic ring 13 is annular and is arranged around the outside of the elastic clamping part 12. After the thermosensitive plastic ring 13 expands due to heat, it can squeeze the elastic clamping part 12 and drive the elastic clamping part 12 to pull the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 to move toward the nut 1.

[0030] During operation, the positive and negative poles of the circuit in the present invention are respectively connected to the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 through connecting wires, that is, the connecting wires are connected to the rivet wire ends of the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 after passing through the nut 1. When connecting the photovoltaic circuit, the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 are connected to each other by plugging the male plug connector 10 and the female plug connector 11, so that a path is formed for the photovoltaic module. In the present invention, the connecting wires are surrounded and clamped by multiple groups of elastic clamps 12, and the elastic clamps 12 center the connecting wires inside the nut 1, thereby reducing the contact between the connecting wires and the edge of the connector end, thereby reducing the wear of the connecting wires by the edge of the connector, increasing the service life of the connecting wires, avoiding the damaged connecting wires from being exposed outside the connector, and reducing the possibility of accidents caused by rainwater intruding into the damaged connecting wires. One end of the elastic clamping piece 12 is connected to the rivet wire end of the copper-aluminum female terminal 7 and the copper-aluminum male terminal 3. The movement of the elastic clamping piece 12 can pull the copper-aluminum female terminal 7 and the copper-aluminum male terminal 3 to move. When the temperature inside the connector is high, the heat-sensitive plastic ring 13 expands due to heat and continuously squeezes the elastic clamping piece 12. The extrusion can make multiple groups of elastic clamping pieces 12 gather toward the middle and squeeze in the direction of the nut 1, so that the multiple groups of elastic clamping pieces 12 are changed from an open state to a contracted state, and under the action of the extrusion force perpendicular to the direction of the nut 1, the copper-aluminum female terminal 7 and the copper-aluminum male terminal 3 are driven to move in the direction of the nut 1, thereby pulling the copper-aluminum female terminal 7 and the copper-aluminum male terminal 3 to separate in opposite directions, avoiding the possibility of irreversible damage to the photovoltaic circuit caused by the continued operation of the photovoltaic module in a high-temperature environment.

[0031] As a further solution of the present invention, a connecting seat 14 is clamped in the nut 1, and a plurality of mounting grooves 15 are provided on the inner side of the connecting seat 14. The upper end of the elastic clamping member 12 is rotatably connected to the mounting groove 15 through a torsion spring. A cross partition 16 is fixedly installed in the middle position of the elastic clamping member 12. The parts of the elastic clamping member 12 on the upper and lower sides of the cross partition 16 are inclined toward the middle position. A connecting block 17 is fixedly installed at the lower end of the elastic clamping member 12, and the connecting block 17 is fixedly connected to the rivet wire ends of the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7.

[0032] During operation, the connecting seat 14 of the present invention is clamped on the top of the nut 1. Under normal conditions, the diaphragm 16 is clamped in the connection gap between the male plastic 4 / female plastic 5 and the waterproof inner plug 2. The outward tension of the elastic clamping member 12 allows the connecting seat 14 and the elastic clamping member 12 to be stably located inside the nut 1. When squeezed, the elastic clamping member 12 contracts toward the middle, causing the diaphragm 16 to gradually detach from the connection gap between the male plastic 4 / female plastic 5 and the waterproof inner plug 2, and the elastic clamping member 12 contracts to be able to be guided out from the end of the nut.

[0033] As a further solution of the present invention, the male plug connector 10 includes a nut 1, a plastic claw 8, a waterproof inner plug 2, a copper-aluminum male terminal 3 and a male plastic 4. One end of the male plastic 4 is threadedly connected to the nut 1, the plastic claw 8 can be clamped on the waterproof inner plug 2, the waterproof inner plug 2 is filled in the nut 1, and the copper-aluminum male terminal 3 is clamped in the male plastic 4.

[0034] During operation, the male plug connector 10 of the present invention is connected to the nut 1 through a thread, and the nut 1 is connected and fixed to the copper-aluminum male terminal 3 through an elastic clip 12, so that the user can simultaneously complete the connection of the copper-aluminum male terminal 3 when assembling the male plug connector 10 and the nut 1, simplifying the assembly process of the connector. At the same time, by binding the nut 1 and the copper-aluminum male terminal 3, the problem of the copper-aluminum male terminal 3 being small in size and easy to lose is reduced.

[0035] As a further solution of the present invention, the female plug connector 11 includes a nut 1, a plastic claw 8, a waterproof inner plug 2, a copper-aluminum female terminal 7 and a female plastic 6. The copper-aluminum female terminal 7 is clamped in the female plastic 6. The female plastic 6 and the male plastic 4 can be clamped together at one end away from the nut 1, and an O-ring 5 is filled between the clamping contact surfaces.

[0036] During operation, the female plastic 6 and the male plastic 4 are more tightly connected by the O-ring 5, and the copper-aluminum female terminal 7 is installed in the same way as the copper-aluminum male terminal 3.

[0037] As a further solution of the present invention, stainless steel claws 9 are fixedly installed on the contact ends of the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7, and the stainless steel claws 9 are welded on the contact ends. An inner crown spring 18 is provided in the contact end of the copper-aluminum female terminal 7.

[0038] During operation, the present invention uses stainless steel claws 9 to limit the rotation of the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 after installation, ensuring the stability of the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 after insertion, and the inner crown spring 18 also makes the connection between the two ends tighter.

[0039] As a further solution of the present invention, the heat-sensitive plastic ring 13 is fixedly installed in the female plastic 6 and the male plastic 4 respectively, and an arc groove 19 is formed on the inner side of one end of the elastic clamping member 12 close to the connecting seat 14.

[0040] During operation, the arc groove 19 of the present invention adheres to the surface of the connecting wire, thereby reducing wear on the contact surface between the connector and the connecting wire.

[0041] As a further solution of the present invention, the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 are provided with three layers of plating, which are a 1.3uM thinnest nickel base layer, a 5uM thinnest copper layer in the middle, and a 5uM thinnest bright tin layer on the surface.

[0042] When working, the present invention uses three layers of coating to make the salt spray test level higher to more than 96 hours.

[0043] As a further solution of the present invention, the rivet wire ends of the copper-aluminum male terminal 3 and the copper-aluminum female terminal 7 are fixedly connected to the connecting wires, and the connecting wires pass through between the elastic clamping parts 12 and are led out to the outside of the nut 1.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A photovoltaic connector end based on copper-aluminum friction welding and gradient plating, comprising a male plug connector (10) and a female plug connector (11), characterized in that: The male plug connector (10) is provided with a copper-aluminum male terminal (3), and the female plug connector (11) is provided with a copper-aluminum female terminal (7). The contact ends of the copper-aluminum male terminal (3) and the copper-aluminum female terminal (7) are made of copper, and the tail rivet wire ends are made of aluminum, and the two are joined by friction welding. One end of each of the male plug connector (10) and the female plug connector (11) is provided with a nut (1), and an overheating protection component is provided in the nut (1). The overheating protection component comprises: An elastic clamping member (12), wherein the elastic clamping member (12) is provided in a plurality of groups and is equidistantly distributed in a circular shape within the nut (1), the elastic clamping member (12) can surround and adhere to the outside of the connecting wire, and the lower end of the elastic clamping member (12) is fixedly connected to the rivet wire ends of the copper-aluminum male terminal (3) and the copper-aluminum female terminal (7); A heat-sensitive plastic ring (13) is annular and arranged around the outside of the elastic clamping member (12). The heat-sensitive plastic ring (13) is capable of squeezing the elastic clamping member (12) after being heated and expanded, and drives the elastic clamping member (12) to pull the copper-aluminum male terminal (3) and the copper-aluminum female terminal (7) toward the nut (1).

2. The photovoltaic connector end based on copper-aluminum friction welding and gradient plating according to claim 1, characterized in that: A connecting seat (14) is clamped in the nut (1), and a plurality of mounting grooves (15) are provided on the inner side of the connecting seat (14). The upper end of the elastic clamp (12) is rotatably connected to the mounting groove (15) through a torsion spring. A transverse partition (16) is fixedly installed in the middle position of the elastic clamp (12). The parts of the elastic clamp (12) on the upper and lower sides of the transverse partition (16) are inclined toward the middle position. A connecting block (17) is fixedly installed at the lower end of the elastic clamp (12), and the connecting block (17) is fixedly connected to the rivet wire ends of the copper-aluminum male terminal (3) and the copper-aluminum female terminal (7).

3. The photovoltaic connector end based on copper-aluminum friction welding and gradient plating according to claim 2, characterized in that: The male plug connector (10) comprises a nut (1), a plastic claw (8), a waterproof inner plug (2), a copper-aluminum male terminal (3) and a male plastic (4), one end of the male plastic (4) is threadedly connected to the nut (1), the plastic claw (8) can be clamped on the waterproof inner plug (2), the waterproof inner plug (2) is filled in the nut (1), and the copper-aluminum male terminal (3) is clamped in the male plastic (4).

4. The photovoltaic connector end based on copper-aluminum friction welding and gradient plating according to claim 1, characterized in that: The female plug connector (11) comprises a nut (1), a plastic claw (8), a waterproof inner plug (2), a copper-aluminum female terminal (7) and a female plastic (6), wherein the copper-aluminum female terminal (7) is clamped in the female plastic (6), and the female plastic (6) and the male plastic (4) at one end away from the nut (1) can be clamped to each other, and an O-ring (5) is filled between the clamping contact surfaces.

5. The photovoltaic connector end based on copper-aluminum friction welding and gradient plating according to claim 4, characterized in that: A stainless steel claw (9) is fixedly mounted on the contact ends of the copper-aluminum male terminal (3) and the copper-aluminum female terminal (7), and the stainless steel claw (9) is welded to the contact ends. An inner crown spring (18) is provided in the contact end of the copper-aluminum female terminal (7).

6. The photovoltaic connector end based on copper-aluminum friction welding and gradient plating according to claim 5, characterized in that: The heat-sensitive plastic ring (13) is fixedly installed in the female plastic (6) and the male plastic (4), respectively. The inner side of one end of the elastic clamping member (12) close to the connecting seat (14) is provided with an arc groove (19).

7. The photovoltaic connector end based on copper-aluminum friction welding and gradient plating according to claim 1, characterized in that: The copper-aluminum male terminal (3) and the copper-aluminum female terminal (7) are provided with three layers of plating, wherein the three layers of plating are respectively a 1.3 μM thinnest nickel base layer, a 5 μM thinnest copper layer in the middle, and a 5 μM thinnest bright tin layer on the surface.

8. The photovoltaic connector end based on copper-aluminum friction welding and gradient plating according to claim 4, characterized in that: The rivet wire ends of the copper-aluminum male terminal (3) and the copper-aluminum female terminal (7) are both fixedly connected to the connecting wire, and the connecting wire passes through between the elastic clamping parts (12) and is led out to the outside of the nut (1).

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