CN220234625U

CN220234625U - Photovoltaic module junction box capable of improving heat dissipation efficiency

Info

Publication number: CN220234625U
Application number: CN202321849129.0U
Authority: CN
Inventors: 段正刚; 熊双
Original assignee: Suzhou QC Solar Co Ltd
Current assignee: Suzhou QC Solar Co Ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2023-12-22
Anticipated expiration: 2033-07-14

Abstract

The utility model provides a photovoltaic module junction box capable of improving heat dissipation efficiency, which comprises a box cover, a box body and a conductive terminal arranged in the box body, wherein the diode is fixedly connected with the conductive terminal, and the connector is electrically connected with the conductive terminal in the junction box through a cable; on the positive and negative conductive terminals of the conductive terminal, a second wing plate which is arranged at an angle with the plane of the conductive terminal is formed at the position where the assembly bus belt passes through; two pins of the diode are of a bending structure, and the pins are welded and fixed with the plane part of the conductive terminal. According to the photovoltaic module junction box, the diode pins are arranged into the bent structure, so that the contact area between the diode pins and the conductive terminals, namely the heat dissipation parts, is increased, and the heat dissipation efficiency is improved; the second wing plate is formed through a stamping process, so that assembly of the converging strip is facilitated, the heat radiating area of the conductive terminal is further increased, the heat radiating performance is further improved, the structural strength of the conductive terminal is improved, and the material utilization rate is improved.

Description

Photovoltaic module junction box capable of improving heat dissipation efficiency

Technical Field

The utility model belongs to the technical field of solar photovoltaic, in particular to a photovoltaic module junction box which is convenient to remarkably improve heat dissipation efficiency and is particularly suitable for high-power photovoltaic modules.

Background

In order to cope with the increasingly serious environmental pollution problem caused by the use of conventional fossil energy, the green renewable energy industry has been rapidly developed in recent years, and a solar cell power generation technology for generating power by using a photovoltaic effect is an important green energy technology. The solar cell is made of materials capable of generating photovoltaic effect, such as silicon, gallium arsenide, indium, selenium and copper, and can convert light energy into electric energy. At present, a photovoltaic module formed by combining a plurality of solar cells is used as a basic photovoltaic power generation unit to be widely applied to various photovoltaic power generation systems of buildings, or a transparent film module is used as a building curtain wall material to build an energy-saving environment-friendly building. In practical use, the junction box is required to be used for leading out the electric energy generated by the photovoltaic module and connecting with an external load, so the junction box of the photovoltaic module is a key component for constructing various power generation systems by the photovoltaic module.

Along with the continuous development of technology, the conversion efficiency of the photovoltaic module is also higher and higher, in addition, high-power modules such as double-glass modules and laminated modules are also being applied more and more, and the excessive current capacity of the junction box used for outputting power of the modules is also higher and higher, so that the heating value of a diode used as a bypass protection device in the junction box is also higher and higher, and the problems of box body bulge, cracking and the like are caused by overheating inside the junction box. In addition, in view of cost reduction, wiring, appearance, and the like, the volume of the junction box needs to be reduced as much as possible, so how to improve the heat dissipation capability of the junction box as much as possible in a space of the junction box as small as possible becomes one of the key considerations for designing and producing the photovoltaic junction box.

Disclosure of Invention

The utility model provides a photovoltaic module junction box capable of improving heat dissipation efficiency, which is particularly suitable for junction box assembly of an automatic production line.

In order to achieve the purpose of the utility model, the technical scheme provided by the utility model is as follows:

the utility model provides a photovoltaic module terminal box for improving radiating efficiency, it includes lid, box body, installs the conductive terminal in the box body, and the conductive terminal includes positive, negative conductive terminal, and with the diode of conductive terminal fixed, two pins of diode are fixed with positive, negative conductive terminal respectively, with the conductive terminal in the terminal box through the connector of cable electric connection, be equipped with the cable buckle with box body fixed in box body tip cable outlet; the positive conductive terminal and the negative conductive terminal of the conductive terminal are provided with second wing plates which are arranged at an angle with the plane of the conductive terminal at the passing position of the assembly bus bar, the second wing plates are clung to the rib plates in the box body, and when the bus bar passes through the conductive terminal fixed connection in the junction box from the assembly, the bus bar penetrates into the box body along the second wing plates and is welded and fixed with the bus bar welding area on the conductive terminal.

Preferably, two pins of the diode are of a bending structure, two pairs of first wing plates perpendicular to the plane of the conductive terminal are formed on the conductive terminal through stamping, a notch for positioning the pins of the diode is formed between the two first wing plates on the same side, and the bent pins of the diode are welded and fixed with the plane part of the conductive terminal.

Still preferably, the bending structure is an L-shaped bending structure with an angle of 90 °.

Still preferably, the pins of the diode are flat structures.

Still preferably, the second wing plate has an included angle of 45-90 degrees with the plane of the conductive terminal.

Still preferably, the side of the conductive terminal is provided with a vertically bent wing edge.

Still preferably, the junction box of the photovoltaic module is a three-split junction box or a single junction box or two-split junction boxes.

The photovoltaic module junction box has the beneficial effects that the diode pins are arranged to be of a bending structure, and then the diode pins are welded and fixed with the plane parts of the conductive terminals, so that the contact area between the diode pins and the conductive terminals, namely the heat dissipation parts, is increased, and the heat dissipation efficiency is improved; the second wing plate is formed at the penetrating position of the bus bar through a stamping process, so that the assembly of the bus bar is facilitated, the heat dissipation area of the conductive terminal is further increased, the heat dissipation performance is further improved, the structural strength of the conductive terminal is also improved, and the material utilization rate is improved.

Drawings

Fig. 1 is an exploded view of a junction box for a photovoltaic module according to an embodiment of the present utility model for improving heat dissipation efficiency;

FIG. 2 is an exploded view of one junction box of the split photovoltaic junction box of FIG. 1;

FIG. 3 is a schematic view of a mounting structure of the conductive terminal and the diode in the junction box of FIG. 1;

fig. 4 is a schematic view (bottom) of the box body of the junction box of fig. 1.

Detailed Description

For a further understanding of the objects, construction, features, and functions of the utility model, reference should be made to the following detailed description of the preferred embodiments.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1, the photovoltaic module junction box for improving heat dissipation efficiency according to an embodiment of the present utility model is a three-split junction box, including a left junction box, a middle junction box and a right junction box, each junction box includes a box cover 10, a box body 30, a conductive terminal 20 installed in the box body, the conductive terminal 20 includes a positive conductive terminal, a negative conductive terminal, and a diode 22 fixed to the conductive terminal, two pins of the diode 22 are respectively fixed to the positive conductive terminal and the negative conductive terminal, connectors 40 respectively electrically connected to the conductive terminals in the left junction box and the right junction box through cables 43, and cable buckles 31 fixed to the box body are provided at cable outlets at end portions of the box body; referring to fig. 2 and 3, two pins 221 and 222 of the diode 22 are bent, two pairs of first wing plates 203 perpendicular to the plane of the conductive terminal are formed on the conductive terminal 20 by punching, a gap for positioning the diode pin is formed between the two first wing plates 203 on the same side, and the bent pin of the diode is welded and fixed with the plane part of the conductive terminal, so that the contact area between the axial diode and the conductive terminal can be increased, and the heat generated by the diode is mainly dissipated through the conductive terminal, so that the heat dissipation efficiency of the axial diode is improved by increasing the contact area between the diode pin and the conductive terminal. In a preferred embodiment, the bending structure is an L-shaped bending structure with an angle of 90 °. In another preferred embodiment, the pins of the diode are flat structures.

With continued reference to fig. 2 and 3, in a preferred embodiment of the present utility model, on the positive and negative conductive terminals of the conductive terminal 20, a second wing 201 disposed at an angle to the plane of the conductive terminal is formed at a position where the assembly bus bar passes through, the second wing 201 is tightly attached to a rib plate 302 (see fig. 4) in the box body, and when the bus bar passes through the assembly to be fixedly connected with the conductive terminal in the junction box, the bus bar passes into the box body along the second wing disposed at an angle to be welded and fixed with a bus bar welding area 204 on the conductive terminal. Because the metal surface is smoother than the plastic teaching material, the assembly efficiency can be improved in the aspect of penetrating the bus belt; the second wing plate also increases the heat dissipation area of the conductive terminal, so that the heat dissipation efficiency of the junction box is further improved; in addition, the arrangement of the second wing plate also reduces the generation of copper plate punching waste materials and improves the utilization rate of the copper plate.

In a preferred embodiment, the second wing forms an angle of 45-90 ° with the plane of the conductive terminal.

In another preferred embodiment, referring to fig. 3, the side edge of the conductive terminal 20 is provided with a vertically bent wing edge 205, so that the area of the conductive terminal can be increased without increasing the size of the terminal box, and the wing edge 205 is adjacent to the side edge of the box body, so that the heat dissipation performance of the terminal box can be further improved.

In the above embodiments, the present utility model is described by taking the three-split junction box as an example, and the present utility model is not limited to the three-split junction box, but may be a single-split junction box or a two-split junction box.

According to the photovoltaic module junction box for improving the heat dissipation efficiency, the diode pins are arranged to be of the bent structure, and then the pipe feet and the plane parts of the conductive terminals are welded and fixed, so that the contact area between the diode pins and the conductive terminals, namely the heat dissipation parts, is increased, and the heat dissipation efficiency is improved; the second wing plate is formed at the penetrating position of the bus bar through a stamping process, so that the assembly of the bus bar is facilitated, the heat dissipation area of the conductive terminal is further increased, the heat dissipation performance is further improved, the structural strength of the conductive terminal is also improved, and the material utilization rate is improved.

The utility model has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the utility model. It should be noted that the disclosed embodiments do not limit the scope of the utility model. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. The photovoltaic module junction box is characterized by comprising a box cover, a box body and conductive terminals arranged in the box body, wherein the conductive terminals comprise positive conductive terminals, negative conductive terminals and diodes fixed with the conductive terminals, two pins of each diode are respectively fixed with the positive conductive terminals and the negative conductive terminals, a connector electrically connected with the conductive terminals in the junction box through cables, and cable buckles fixed with the box body are arranged at cable outgoing positions at the end parts of the box body; the positive conductive terminal and the negative conductive terminal of the conductive terminal are provided with second wing plates which are arranged at an angle with the plane of the conductive terminal at the passing position of the assembly bus bar, the second wing plates are clung to the rib plates in the box body, and when the bus bar passes through the conductive terminal fixed connection in the junction box from the assembly, the bus bar penetrates into the box body along the second wing plates and is welded and fixed with the bus bar welding area on the conductive terminal.

2. The junction box of the photovoltaic module for improving the heat dissipation efficiency according to claim 1, wherein two pins of the diode are of a bending structure, two pairs of first wing plates perpendicular to the plane of the conductive terminal are formed on the conductive terminal through stamping, a notch for positioning the pins of the diode is formed between the two first wing plates on the same side, and the bent pins of the diode are welded and fixed with the plane part of the conductive terminal.

3. The photovoltaic module junction box for improving heat dissipation efficiency according to claim 2, wherein the bending structure is an L-shaped bending structure with an angle of 90 °.

4. A photovoltaic module junction box for improving heat dissipation efficiency as set forth in claim 2 or 3, wherein said diode pins are of flat configuration.

5. The photovoltaic module junction box for improving heat dissipation efficiency according to claim 4, wherein the second wing plate has an angle of 45 ° to 90 ° with respect to the plane of the conductive terminal.

6. The photovoltaic module junction box for improving heat dissipation efficiency according to claim 2, wherein the side edges of the conductive terminals are provided with vertically bent wing edges.

7. The photovoltaic module junction box for improving heat dissipation efficiency according to claim 1, wherein the photovoltaic module junction box is a three-split junction box or a single junction box or two-split junction box.