Thin film photovoltaic junction box

Abstract

The utility model relates to the field of photovoltaic junction boxes, and discloses a film photovoltaic junction box which comprises a box body and a box cover, the bottom surface of the box body is provided with a heat dissipation groove, the front end surface of the box body is provided with two wire passing holes, the box body is internally provided with a plurality of conducting strips arranged side by side, and the conducting strips at the two ends are connected with outgoing lines penetrating through the wire passing holes. A bypass diode is connected between every two adjacent conducting strips, the front end of the box body is fixedly connected with a connecting pipe on the outer side of the wire passing hole, the front end face of the connecting pipe is provided with a plurality of notches, the outer side of the connecting pipe is in threaded connection with a cover cap, the inner bottom of the cover cap is provided with a chamfer, the inside of the box body is fixedly connected with a plurality of positioning seats, and the top faces of the positioning seats are provided with positioning grooves matched with the conducting strips. Two pressing plates are symmetrically arranged in the box body, mounting holes are symmetrically formed in the two ends of each pressing plate, vertical plates penetrating through the mounting holes are fixedly connected to the inner bottom face of the box body, and a protruding block is fixedly connected to one side of each vertical plate. According to the utility model, the installation stability of the outgoing line and the conducting strip is effectively improved, the heat dissipation performance of the junction box is good, and the use stability and safety of the junction box are improved.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic junction boxes, in particular to a thin-film photovoltaic junction box. Background Art

[0002] Solar energy is a renewable resource, and solar cell technology, which utilizes the photovoltaic effect to generate electricity, has garnered significant attention worldwide. Solar cells are made of materials that produce the photovoltaic effect, converting light energy into electricity. In practice, a photovoltaic junction box is required to extract the electricity generated by photovoltaic modules and connect it to external loads. Therefore, the photovoltaic module junction box is a key component in various power generation systems built using photovoltaic modules.

[0003] In thin-film solar cell power generation systems, a photovoltaic (PV) thin-film junction box assembly is typically used to electrically connect the thin-film solar cell panels. Therefore, the key consideration in the design of this miniature junction box is ensuring the stability and safety of the electrical connection units within the junction box during use.

[0004] Most existing solar photovoltaic thin-film junction boxes use traditional riveting connection methods to connect the wire end connector inside the junction box with the external cable. The connection reliability is poor. When the external cable is twisted or stretched, the wire end connector will also be affected and shift or shake, which can easily cause the diode to loosen or break off from the wire end connector. When the external cable is stretched to a large extent, the external cable may even become disconnected from the wire end connector. Therefore, the stability and safety of the junction box are poor. Utility Model Content

[0005] The technical problem to be solved by the present invention is that the existing thin-film photovoltaic junction boxes have poor stability and safety in use.

[0006] The top of the box body is provided with a heat dissipation groove, and the bottom of the box body is provided with a heat dissipation groove. The bottom of the box body is provided with a heat dissipation groove, and the front end surface is provided with two wire holes. A plurality of conductive sheets arranged side by side are installed inside, and the conductive sheets at both ends are connected with lead wires passing through the wire holes, and a bypass diode is connected between every two adjacent conductive sheets. The front end of the box body is fixedly connected to the outside of the wire holes, and the front end surface of the connecting tube is provided with a plurality of notches, and a cover is connected to the outside threadedly. The bottom of the cover is provided with a chamfer. The inside of the box body is fixed with a plurality of positioning seats, the top surface of the positioning seat is provided with a positioning groove adapted for the conductive sheet, and the top of the positioning seat is fixed with a plurality of limit blocks on the outside of the positioning groove. The inside of the box body is symmetrically provided with two pressure plates, and the two ends of the pressure plate are symmetrically provided with mounting holes. The bottom surface of the box body is fixed with a vertical plate passing through the mounting holes, and one side of the vertical plate is fixed with a protrusion.

[0007] Furthermore, a wiring terminal is fixedly connected to the front end of the conductive sheet, and the lead wire is connected to the wiring terminal.

[0008] Furthermore, an opening communicating with the heat dissipation slot is provided at the lower rear end of the box body, a protective cover is fixedly connected to the outer side of the opening at the rear end of the box body, and a protective strip is fixedly connected to the edge of the heat dissipation slot inside the box body.

[0009] Furthermore, a downward bending portion is provided at the rear end of the conductive sheet, and a groove adapted to the bending portion is provided at the rear end of the positioning slot.

[0010] Furthermore, a through slot is provided in the middle of the positioning seat, and a plurality of heat dissipation holes connected to the through slot are provided in the positioning slot.

[0011] Furthermore, a sealing ring is bonded to the wire hole inside the box body. The sealing ring is made of flexible rubber material, and its inner diameter is smaller than the diameter of the lead-out wire.

[0012] Furthermore, the depth of the positioning groove is smaller than the thickness of the conductive sheet.

[0013] The advantages of this utility model over existing technologies are: when tightening the cap, the chamfered corners cause the front end of the connecting tube to bend inward along the chamfers, so that the front end of the connecting tube presses and secures the lead wires, effectively preventing poor contact between the lead wires and the terminal due to tension on the external lead wires. It also prevents the lead wires from causing the conductive sheet to shake, and the limiting grooves and pressure plates secure the conductive sheet, thereby improving the stability of the bypass diode installation. This utility model effectively improves the installation stability of the lead wires and conductive sheet, and the heat dissipation performance of the junction box is good, improving the stability and safety of the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the present utility model.

[0015] Figure 2 It is a structural diagram of the box body of the utility model.

[0016] Figure 3 It is a cross-sectional view of the installation structure of the connecting pipe of the utility model.

[0017] Figure 4 It is a structural diagram of the positioning seat of the utility model.

[0018] Figure 5 It is an installation structure diagram of the pressing plate of the utility model.

[0019] As shown in the figure: 1. Box body; 2. Box cover; 3. Conductive sheet; 4. Lead wire; 5. Bypass diode; 6. Connecting tube; 7. Cover; 8. Positioning seat; 9. Limit block; 10. Pressing plate; 11. Vertical plate; 12. Bump; 13. Terminal block; 14. Protective cover; 15. Protective strip; 16. Sealing ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] like Figure 1 and Figure 2 As shown, a thin-film photovoltaic junction box includes a box body 1 and a box cover 2. A heat dissipation groove is provided on the bottom surface of the box body 1, and two wire holes are provided on the front surface. A plurality of conductive sheets 3 arranged side by side are installed inside. The conductive sheets 3 at both ends are connected with lead wires 4 passing through the wire holes. A bypass diode 5 is connected between every two adjacent conductive sheets 3. A wiring terminal 13 is fixedly connected to the front end of the conductive sheet 3, and the lead wire 4 is connected to the wiring terminal 13. An opening connected to the heat dissipation groove is provided at the lower rear end of the box body 1, and a protective cover 14 is fixedly connected to the outside of the opening at the rear end of the box body 1. A protective strip 15 is fixedly connected to the edge of the heat dissipation groove inside the box body 1.

[0022] By providing the rear end opening of the box body 1 and the protective cover 14 , the area of ​​the heat dissipation slot can be effectively increased, thereby improving the heat dissipation effect.

[0023] like Figure 2 and Figure 3 As shown, a connecting tube 6 is fixedly connected to the outside of the wire hole at the front end of the box body 1, and a plurality of slots are opened on the front end surface of the connecting tube 6. A cap 7 is threadedly connected to the outside, and the bottom of the cap 7 is chamfered. A sealing ring 16 is bonded to the wire hole inside the box body 1. The sealing ring 16 is made of flexible rubber, and its inner diameter is smaller than the diameter of the lead-out wire 4.

[0024] When tightening the cap 7, the chamfered corners cause the front end of the connecting tube 6 to bend inward along the corners, pressing the lead wire 4 against the front end. This effectively prevents the lead wire 4 from contacting the terminal 13 due to tension on the lead wire 4, and prevents the lead wire 4 from causing the conductive sheet 3 to shake, thereby improving the installation stability of the bypass diode 5. The sealing ring 16 enhances the waterproof and dustproof properties of the box body 1. To further enhance the waterproof performance, the front end of the cap 7 can be bonded to a sealing ring sleeved on the outside of the lead wire 4.

[0025] like Figure 2 、 Figure 4 and Figure 5 As shown, a plurality of positioning seats 8 are fixedly connected to the inside of the box body 1, and a positioning groove adapted to the conductive sheet 3 is provided on the top surface of the positioning seat 8, and a plurality of limit blocks 9 are fixedly connected to the top of the positioning seat 8 on the outside of the positioning groove. The depth of the positioning groove is less than the thickness of the conductive sheet 3, and a downward bending portion is provided at the rear end of the conductive sheet 3, and a groove adapted to the bending portion is provided at the rear end of the positioning groove. A through groove is provided in the middle of the positioning seat 8, and a plurality of heat dissipation holes connected to the through groove are provided in the positioning groove.

[0026] By providing a bending portion at the rear end of the conductive sheet 3, in conjunction with the positioning groove and the recess, the installation position of the conductive sheet 3 can be limited, which can effectively reduce the shaking of the conductive sheet 3; by providing a through groove in the middle of the positioning seat 8, a plurality of heat dissipation holes connected to the through groove are provided in the positioning groove, thereby increasing the contact area between the conductive sheet 3 and the air without affecting the installation stability of the conductive sheet 3, thereby improving the heat dissipation effect of the conductive sheet 3.

[0027] like Figure 2 and Figure 5 As shown, two pressing plates 10 are symmetrically provided inside the box body 1 , with mounting holes symmetrically opened at both ends of the pressing plates 10 . A vertical plate 11 passing through the mounting holes is fixedly connected to the bottom surface of the box body 1 , and a protrusion 12 is fixedly connected to one side of the vertical plate 11 .

[0028] The pressing plate 10 is placed above the conductive sheet 3 , and the top of the vertical plate 11 passes through the mounting hole. The pressing plate 10 is fixed by the protrusion 12 , thereby preventing the conductive sheet 3 from moving up and down.

[0029] In actual use, the cap 7 is separated from the connecting tube 6, one end of the lead wire 4 is passed through the cap 7 and the connecting tube 6 and then inserted into the box body 1 and connected to the terminal 13. The conductive sheet 3 is placed in the positioning groove and fixed by the pressing plate 11. The cap 7 is tightened to fix the lead wire 4, thereby effectively improving the installation stability of the lead wire 4 and the conductive sheet 3, and improving the stability and safety of the junction box. The installation and connection of the busbar can be achieved through the heat dissipation groove. A glue filling port is opened on the top of the protective cover 14, and the heat dissipation groove can be filled with glue through the glue filling port.

[0030] The undisclosed parts in the present invention are all prior art, and their specific structures and working principles are not described in detail here.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0033] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A thin-film photovoltaic junction box, comprising a box body (1) and a box cover (2), wherein the bottom surface of the box body (1) is provided with a heat dissipation groove, the front surface is provided with two wire holes, a plurality of conductive sheets (3) arranged side by side are installed inside, the conductive sheets (3) at both ends are connected with lead wires (4) passing through the wire holes, and a bypass diode (5) is connected between every two adjacent conductive sheets (3), characterized in that: The front end of the box body (1) is fixedly connected to a connecting tube (6) outside the wire hole, and a plurality of notches are provided on the front end surface of the connecting tube (6), and a cap (7) is threadedly connected to the outside. The inner bottom of the cap (7) is provided with a chamfer. A plurality of positioning seats (8) are fixedly connected to the inside of the box body (1), and a positioning groove adapted to the conductive sheet (3) is provided on the top surface of the positioning seat (8), and a plurality of limit blocks (9) are fixedly connected to the top of the positioning seat (8) outside the positioning groove. Two pressing plates (10) are symmetrically provided inside the box body (1), and mounting holes are symmetrically provided at both ends of the pressing plate (10). A vertical plate (11) penetrating the mounting hole is fixedly connected to the inner bottom surface of the box body (1), and a protrusion (12) is fixedly connected to one side of the vertical plate (11).

2. The thin-film photovoltaic junction box according to claim 1, characterized in that: A connection terminal (13) is fixedly connected to the front end of the conductive sheet (3), and the lead wire (4) is connected to the connection terminal (13).

3. The thin-film photovoltaic junction box according to claim 1, characterized in that: An opening communicating with the heat dissipation groove is provided at the lower portion of the rear end of the box body (1), and a protective cover (14) is fixedly connected to the outer side of the opening at the rear end of the box body (1), and a protective strip (15) is fixedly connected to the inside of the box body (1) along the edge of the heat dissipation groove.

4. The thin-film photovoltaic junction box according to claim 1, characterized in that: The rear end of the conductive sheet (3) is provided with a downward bending portion, and the rear end of the positioning slot is provided with a groove adapted to the bending portion.

5. The thin-film photovoltaic junction box according to claim 4, characterized in that: A through slot is provided in the middle of the positioning seat (8), and a plurality of heat dissipation holes connected to the through slot are provided in the positioning slot.

6. The thin-film photovoltaic junction box according to claim 1, characterized in that: A sealing ring (16) is bonded to the wire hole inside the box body (1). The sealing ring (16) is made of flexible rubber material, and its inner diameter is smaller than the diameter of the lead wire (4).

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