Photovoltaic electrical energy-saving connector

Abstract

The utility model belongs to the technical field of photovoltaic connectors, and relates to a photovoltaic electrical energy-saving connector, which comprises a first joint and a second joint. A first wiring terminal is arranged in the first joint in a penetrating manner, and a second wiring terminal is arranged in the second joint in a penetrating manner; the first wiring terminal comprises a first end post, a lower contact piece is fixed at the right end of the first end post, and a first U-shaped clamp is fixed at the left end of the first end post; the second wiring terminal comprises a second end post, an upper contact piece is fixed at the left end of the second end post, and a second U-shaped clamp is fixed at the right end of the second end post; a base is fixed to the right end of the first connector, a cover plate is fixed to the left end of the second connector, and the cover plate and the base are detachably connected through a plurality of screws. When the connector is used for circuit connection, the upper contact piece and the lower contact piece are in compression joint, the contact area and positive pressure between the upper contact piece and the lower contact piece can be increased, impedance can be reduced, loss generated when current flows between the upper contact piece and the lower contact piece can be reduced, and energy conservation and consumption reduction are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic connectors, and in particular relates to a photovoltaic electrical energy-saving connector. Background Art

[0002] With the widespread application of photovoltaic power generation, connectors are widely used in the DC connection between components such as components, junction boxes, controllers and inverters in photovoltaic power generation systems. Connectors have the advantages of high reliability, easy use, good waterproof and dustproof performance, etc. Existing connectors are generally male-female plug-in structures, such as the common MC4 connector, whose female and male terminals are both tubular structures. When plugged in, the male terminal is inserted into the female terminal, and the positive pressure between the male and female terminals is small, which leads to a large impedance of the connector itself, and a large loss when the current flows between the male and female terminals, which is not conducive to energy saving and consumption reduction. Utility Model Content

[0003] The purpose of the utility model is to provide a photovoltaic electrical energy-saving connector, in which the upper contact piece and the lower contact piece of the connector are pressed together to form a crimped connection, which can increase the contact area and positive pressure between the upper contact piece and the lower contact piece, reduce impedance, and reduce the loss generated when the current flows between the upper contact piece and the lower contact piece, which is beneficial to energy saving and consumption reduction.

[0004] The utility model is realized through the following technical solutions.

[0005] A photovoltaic electrical energy-saving connector comprises a first joint and a second joint, wherein a first connection terminal is installed inside the first joint, and a second connection terminal is installed inside the second joint;

[0006] The first terminal comprises a first end column, a lower contact piece is welded or integrally formed at the right end of the first end column, and a first U-shaped clip for crimping a wire is welded or integrally formed at the left end thereof; a wire can be crimped with the first U-shaped clip;

[0007] The second terminal comprises a second end column, the left end of which is welded or integrally formed with an upper contact sheet, and the right end of which is welded or integrally formed with a second U-shaped clip for crimping a wire; another wire can be crimped with the second U-shaped clip;

[0008] A base is welded or integrally formed at the right end of the first joint, and a cover plate is welded or integrally formed at the left end of the second joint;

[0009] When the cover is closed on the base, the upper contact piece and the lower contact piece are located inside the cover and the base, and the bottom surface of the upper contact piece is crimped with the top surface of the lower contact piece (the bottom surface of the upper contact piece is in contact with the top surface of the lower contact piece and there is a certain pressure between the upper contact piece and the lower contact piece), and the cover and the base are detachably connected by multiple screws; when the connector is used for circuit connection, it is different from the existing MC4 connector using a male and female plug-in structure in that the upper contact piece and the lower contact piece are crimped, which increases the contact area and positive pressure between the two, can reduce impedance, reduce the loss generated when current flows between the upper contact piece and the lower contact piece, and can be beneficial to energy saving and consumption reduction.

[0010] Furthermore, the first end column and the second end column are both variable diameter tubular structures, and variable diameter channels are provided inside the first connector and inside the second connector; after an electric wire passes through the first connector and is crimped with the first U-shaped clamp, the first end column can pass through the variable diameter channel from the right end of the first connector, and a blockage can be formed at the place where the channel changes diameter, thereby limiting the first end column to prevent the first end column from being pulled out from the left end of the first connector when the electric wire is pulled; after another electric wire passes through the second connector and is crimped with the second U-shaped clamp, the second end column passes through the variable diameter channel from the left end of the second connector, and a blockage can be formed at the place where the channel changes diameter, thereby limiting the second end column to prevent the second end column from being pulled out from the right end of the second connector when the electric wire is pulled.

[0011] Furthermore, a limiting column is welded or integrally formed on the top surface of the lower contact piece, and a limiting hole for the limiting column to pass through is opened on the upper contact piece; when the connector circuit is connected, the cover plate is covered on the base, the bottom surface of the upper contact piece is crimped with the top surface of the lower contact piece, and the limiting column passes through the limiting hole to form a limit, thereby improving the stability of the connection structure between the lower contact piece and the upper contact piece, and the cover plate and the base are fixedly connected by multiple screws to assemble the connector.

[0012] Furthermore, the first wiring terminal and the second wiring terminal are both integrally formed structures, both are made of pure copper, and are provided with a tin-plated layer on the outer surface, and have low resistance and high conductivity.

[0013] Furthermore, the interior of the cover plate is filled with a filling plug for pressing the upper contact piece; when the connector circuit is connected, the cover plate is connected to the base, the bottom surface of the upper contact piece is crimped with the top surface of the lower contact piece, the bottom surface of the filling plug is abutted against the top surface of the upper contact piece, and its top surface is abutted against the inner wall of the cover plate, which can increase the contact pressure between the upper contact piece and the lower contact piece.

[0014] Furthermore, the cover plate and the base are engaged with each other in a concave-convex manner, and a sealing gasket is provided at the contact interface between the cover plate and the base. When the cover plate and the base are connected by a plurality of screws, the sealing gasket seals the gap between the cover plate and the base to prevent water.

[0015] Furthermore, the left end of the first connector and the right end of the second connector are both provided with waterproof rings, and when the circuit is connected, the waterproof rings can be put on the outside of the wires; the left end of the first connector and the right end of the second connector are both threadedly connected with screw caps, and the screw caps are used to squeeze the waterproof rings to form a waterproof seal; when the left screw cap is tightened and fixed to the left end of the first connector, it squeezes the left waterproof ring, so that the waterproof ring forms a blockage on the left end face of the first connector, preventing rainwater from seeping into the internal channel of the first connector and causing a short circuit of the first terminal; when the right screw cap is tightened and fixed to the right end of the second connector, it squeezes the right waterproof ring, so that the waterproof ring forms a blockage on the right end face of the second connector, preventing rainwater from seeping into the internal channel of the second connector and causing a short circuit of the second terminal.

[0016] Furthermore, the left end face of the first joint and the right end face of the second joint are welded with a plurality of pressure plates evenly distributed in a circular shape. The pressure plates are tough and can be expanded to insert the waterproof ring thereinto, so as to limit the position of the waterproof ring. When the screw cap is tightened, the screw cap squeezes the pressure plate and thereby squeezes the waterproof ring, which can increase the degree of squeezing of the waterproof ring and improve the waterproof sealing.

[0017] Furthermore, the outer side wall of the first joint, the outer side wall of the second joint and the outer side wall of each screw cap are provided with a plurality of anti-skid grooves, which provide good anti-skid property when the screw cap is rotated, and can ensure that the screw cap is tightened.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The connector can be used for electrical connection of the DC ends between components, such as components, junction boxes, controllers and inverters in a photovoltaic power generation system. The inner core of one wire can be crimped with a first U-shaped clip using a crimping pliers, and the inner core of another wire can be crimped with a second U-shaped clip using a crimping pliers. The cover plate can be closed on the base, and the upper contact piece and the lower contact piece are located inside the cover plate and the base. The bottom surface of the upper contact piece contacts the top surface of the lower contact piece. After the cover plate and the base are fixedly connected by a plurality of screws, the upper contact piece and the lower contact piece are pressed to form a crimping connection, which can increase the contact area and positive pressure between the upper contact piece and the lower contact piece, reduce impedance, and reduce the loss generated when current flows between the upper contact piece and the lower contact piece, which can be beneficial to energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0022] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0023] The names of the components in the figure are: 1. first connector, 2. base, 3. cover plate, 4. second connector, 5. second terminal, 5.1. second end column, 5.2. upper contact piece, 5.3. second U-shaped clip, 6. filling plug, 7. first terminal, 7.1. first end column, 7.2. lower contact piece, 7.3. first U-shaped clip, 8. sealing gasket, 9. screw cap, 10. pressing piece, 11. waterproof ring, 12. wire, 13. screw, 14. limit column, 15. limit hole. DETAILED DESCRIPTION

[0024] The following is a further description of the structures involved in the present invention or the technical terms used. These descriptions are merely examples of how the present invention is implemented and do not constitute any limitation to the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "lateral", "longitudinal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc., are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, "connection", "fixation" and the like should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] A photovoltaic electrical energy-saving connector, such as Figures 1 to 3 As shown, it is composed of a first joint 1, a second joint 4, a first connecting terminal 7, a second connecting terminal 5 and a screw cap 9.

[0028] like Figure 1 As shown, the first joint 1 and the second joint 4 are both provided with a variable diameter channel;

[0029] like Figure 1 and Figure 3As shown, the first terminal 7 includes a first terminal post 7.1, a lower contact piece 7.2 is integrally formed at the right end of the first terminal post 7.1, and a first U-shaped clip 7.3 for crimping the wire 12 is integrally formed at the left end thereof; one wire 12 can be crimped with the first U-shaped clip 7.3;

[0030] The second terminal 5 includes a second terminal post 5.1, the left end of which is integrally formed with an upper contact piece 5.2, and the right end of which is integrally formed with a second U-shaped clip 5.3 for crimping the wire 12; another wire 12 can be crimped with the second U-shaped clip 5.3; the first terminal 7 and the second terminal 5 are both made of pure copper, and the outer surface is provided with a tin-plated layer, which has low resistance and high conductivity;

[0031] The first end column 7.1 and the second end column 5.1 are both variable diameter tubular structures. After an electric wire 12 passes through the first connector 1 and is crimped with the first U-shaped clamp 7.3, the first end column 7.1 can pass through the variable diameter channel from the right end of the first connector 1, and a blockage can be formed at the place where the channel changes diameter, thereby limiting the first end column 7.1 to prevent the first end column 7.1 from being pulled out from the left end of the first connector 1 when the electric wire 12 is pulled; after another electric wire 12 passes through the second connector 4 and is crimped with the second U-shaped clamp 5.3, the second end column 5.1 passes through the variable diameter channel from the left end of the second connector 4, and a blockage can be formed at the place where the channel changes diameter, thereby limiting the second end column 5.1 to prevent the second end column 5.1 from being pulled out from the right end of the second connector 4 when the electric wire 12 is pulled.

[0032] like Figures 1 to 3 As shown, a base 2 is welded to the right end of the first joint 1, and a cover plate 3 is welded to the left end of the second joint 4; the cover plate 3 and the base 2 are engaged with each other, and a sealing gasket 8 is provided at the contact interface between the cover plate 3 and the base 2. When the cover plate 3 and the base 2 are connected by a plurality of screws 13, the sealing gasket 8 seals the gap between the cover plate 3 and the base 2 to prevent water from leaking out. Specifically, an arched protrusion is welded or integrally formed on the top surface of the left end of the base 2, and a groove that matches the arched protrusion is provided on the inner side wall of the left end of the cover plate 3, a bump is welded or integrally formed on the bottom surface of the right end of the cover plate 3, and a groove that matches the bump is provided on the top surface of the right end of the base 2. When the bumps are engaged with each other, the sealing gasket 8 can seal the gap, thereby preventing rainwater from penetrating into the interior of the cover plate 3 or the base 2 from the end surface.

[0033] like Figure 1 and Figure 2 As shown, when the cover plate 3 is covered on the base 2, the upper contact sheet 5.2 and the lower contact sheet 7.2 are located inside the cover plate 3 and the base 2, and the bottom surface of the upper contact sheet 5.2 is pressed against the top surface of the lower contact sheet 7.2, and the cover plate 3 and the base 2 are detachably connected by a plurality of screws 13;

[0034] The interior of the cover plate 3 is filled with a filling plug 6 for pressing the upper contact piece 5.2; when the connector circuit is connected, the cover plate 3 is connected to the base 2, the bottom surface of the upper contact piece 5.2 is crimped with the top surface of the lower contact piece 7.2, the bottom surface of the filling plug 6 is against the top surface of the upper contact piece 5.2, and its top surface is against the inner wall of the cover plate 3, which can increase the contact pressure between the upper contact piece 5.2 and the lower contact piece 7.2.

[0035] like Figure 1 and Figure 3 As shown, the left end of the first connector 1 and the right end of the second connector 4 are both provided with a waterproof ring 11. When the circuit is connected, the waterproof ring 11 can be sleeved outside the wire 12; the left end of the first connector 1 and the right end of the second connector 4 are both threadedly connected with a screw cap 9, and the screw cap 9 is used to squeeze the waterproof ring 11 to form a waterproof seal; when the left screw cap 9 is tightened and fixed to the left end of the first connector 1, it squeezes the left waterproof ring 11, so that the waterproof ring 11 forms a blockage on the left end face of the first connector 1, preventing rainwater from penetrating into the internal channel of the first connector 1 and causing a short circuit of the first terminal 7; when the right screw cap 9 is tightened and fixed to the right end of the second connector 4, it squeezes the right waterproof ring 11, so that the waterproof ring 11 forms a blockage on the right end face of the second connector 4, preventing rainwater from penetrating into the internal channel of the second connector 4 and causing a short circuit of the second terminal 5.

[0036] Preferably, in this embodiment, Figure 1 and Figure 3 As shown, the top surface of the lower contact piece 7.2 is integrally formed with a limiting column 14, and the upper contact piece 5.2 is provided with a limiting hole 15 for the limiting column 14 to pass through; when the connector circuit is connected, the cover plate 3 is covered on the base 2, the bottom surface of the upper contact piece 5.2 is crimped with the top surface of the lower contact piece 7.2, and the limiting column 14 passes through the limiting hole 15 to form a limit, thereby improving the stability of the connection structure between the lower contact piece 7.2 and the upper contact piece 5.2. The cover plate 3 and the base 2 are fixedly connected by multiple screws 13, so that the connector is assembled.

[0037] Preferably, in this embodiment, Figure 1 and Figure 3 As shown, the left end face of the first joint 1 and the right end face of the second joint 4 are welded with a plurality of pressing sheets 10 uniformly distributed in a circular ring shape, the pressing sheet 10 has toughness, the pressing sheet 10 can be expanded to insert the waterproof ring 11 therein, and the waterproof ring 11 can be limited in position. When the screw cap 9 is tightened, the screw cap 9 squeezes the pressing sheet 10 and thus squeezes the waterproof ring 11, which can increase the squeezing degree of the waterproof ring 11 and improve the waterproof sealing performance.

[0038] Preferably, in this embodiment, Figures 1 to 3 As shown, the outer wall of the first joint 1, the outer wall of the second joint 4 and the outer wall of each screw cap 9 are provided with a plurality of anti-skid grooves, which have good anti-skid properties when the screw cap 9 is rotated, and can ensure that the screw cap 9 is tightened.

[0039] The working principle of the connector in this embodiment is:

[0040] When the connector is used for circuit connection, the first connector 1, the second connector 4, the first wiring terminal 7, the second wiring terminal 5 and the screw cap 9 are all in a disassembled state;

[0041] A wire 12 is passed through the left screw cap 9, the waterproof ring 11, and the internal channel of the first joint 1 in sequence. After the wire 12 is pulled out of the inner core, it is inserted into the first U-shaped clip 7.3. The first U-shaped clip 7.3 is crimped with the inner core of the wire 12 using a wire crimping pliers. Then, the wire 12 is pulled leftward, and the first U-shaped clip 7.3 and the first end column 7.1 are inserted into the internal channel of the first joint 1. A block can be formed at the place where the channel changes diameter, so as to limit the first end column 7.1 to avoid pulling the first end column 7.1 out of the left end of the first joint 1 when pulling the wire 12. The left screw cap 9 is tightened and fixed to the left end of the first joint 1, so that the waterproof ring 11 forms a waterproof seal at the left end surface of the first joint 1.

[0042] Pass another electric wire 12 through the right screw cap 9, the waterproof ring 11, and the internal passage of the second joint 4 in sequence. After the electric wire 12 is pulled out of the inner core, it is inserted into the second U-shaped clip 5.3. The second U-shaped clip 5.3 is crimped with the inner core of the electric wire 12 using a wire crimping pliers. Then, pull the electric wire 12 to the right, and insert the second U-shaped clip 5.3 and the second end column 5.1 into the internal passage of the second joint 4. A block can be formed at the place where the passage changes in diameter, so as to limit the second end column 5.1 to avoid pulling the second end column 5.1 out of the right end of the second joint 4 when pulling the electric wire 12. Tighten the right screw cap 9 and fix it on the right end of the second joint 4, so that the waterproof ring 11 forms a waterproof seal at the right end face of the second joint 4.

[0043] The cover plate 3 is covered with the base 2. At this time, the bottom surface of the upper contact piece 5.2 is in contact with the top surface of the lower contact piece 7.2, the bottom surface of the filling plug 6 is against the top surface of the upper contact piece 5.2, and its top surface is against the inner wall of the cover plate 3. After installing multiple screws 13 to fix the cover plate 3 and the base 2, the sealing gasket 8 between the cover plate 3 and the base 2 is squeezed to form a waterproof seal, and the upper contact piece 5.2 and the lower contact piece 7.2 are pressed to form a crimping connection, which can increase the contact area and positive pressure between the upper contact piece 5.2 and the lower contact piece 7.2, reduce impedance, and reduce the loss generated when the current flows between the upper contact piece 5.2 and the lower contact piece 7.2, which can be beneficial to energy saving and consumption reduction.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic electrical energy-saving connector, comprising a first connector (1) and a second connector (4), wherein a first terminal (7) is installed inside the first connector (1), and a second terminal (5) is installed inside the second connector (4), characterized in that: The first connecting terminal (7) comprises a first end column (7.1), a lower contact piece (7.2) is fixed to the right end of the first end column (7.1), and a first U-shaped clamp (7.3) for crimping an electric wire (12) is fixed to the left end of the first end column (7.1); The second terminal (5) comprises a second end column (5.1), an upper contact piece (5.2) is fixed to the left end of the second end column (5.1), and a second U-shaped clamp (5.3) for crimping an electric wire (12) is fixed to the right end of the second end column (5.1); The right end of the first connector (1) is fixed with a base (2), and the left end of the second connector (4) is fixed with a cover plate (3); when the cover plate (3) is covered on the base (2), the upper contact piece (5.2) and the lower contact piece (7.2) are located inside the cover plate (3) and the base (2), and the bottom surface of the upper contact piece (5.2) is pressed against the top surface of the lower contact piece (7.2), and the cover plate (3) and the base (2) are detachably connected via a plurality of screws (13).

2. The photovoltaic electrical energy-saving connector according to claim 1, characterized in that: The first end column (7.1) and the second end column (5.1) are both variable diameter tubular structures, and variable diameter channels are provided inside the first joint (1) and inside the second joint (4).

3. The photovoltaic electrical energy-saving connector according to claim 1, characterized in that: A limiting column (14) is fixed on the top surface of the lower contact piece (7.2), and a limiting hole (15) is provided on the upper contact piece (5.2) for the limiting column (14) to penetrate.

4. The photovoltaic electrical energy-saving connector according to claim 1, characterized in that: The first wiring terminal (7) and the second wiring terminal (5) are both integrally formed structures, both are made of pure copper, and have a tin-plated layer on the outer surface.

5. The photovoltaic electrical energy-saving connector according to claim 1, characterized in that: The interior of the cover plate (3) is filled with a filling plug (6) for pressing the upper contact sheet (5.2).

6. The photovoltaic electrical energy-saving connector according to claim 1, characterized in that: The cover plate (3) and the base (2) are engaged with each other in a concave-convex manner, and a sealing gasket (8) is provided at the contact interface between the cover plate (3) and the base (2).

7. The photovoltaic electrical energy-saving connector according to claim 1, characterized in that: The left end of the first joint (1) and the right end of the second joint (4) are both provided with a waterproof ring (11); the left end of the first joint (1) and the right end of the second joint (4) are both threadedly connected with a screw cap (9), and the screw cap (9) is used to squeeze the waterproof ring (11) to form a waterproof seal.

8. The photovoltaic electrical energy-saving connector according to claim 1, characterized in that: The left end surface of the first joint (1) and the right end surface of the second joint (4) are both welded with a plurality of pressing sheets (10) evenly distributed in a circular ring shape.

9. The photovoltaic electrical energy-saving connector according to claim 7, characterized in that: The outer side wall of the first joint (1), the outer side wall of the second joint (4) and the outer side wall of each screw cap (9) are all provided with a plurality of anti-slip grooves.

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