Photovoltaic junction box with high waterproof performance

Abstract

The utility model relates to the technical field of photovoltaic junction boxes, in particular to a photovoltaic junction box with high waterproof performance, which comprises a positive electrode box, a middle box and a negative electrode box, a box cover is arranged on one side above the positive electrode box, the middle box and the negative electrode box, and a plurality of glue overflowing grooves are arranged on one side of the positive electrode box, the middle box and the negative electrode box close to the box cover. Rib position supporting columns are arranged at four corners of the positive electrode box, the middle box and the negative electrode box, electric conductors are arranged in the positive electrode box, the middle box and the negative electrode box, wiring ports are formed in one side of the positive electrode box and one side of the negative electrode box, connecting wires are arranged in the wiring ports, and irradiation heat-shrinkable sleeves are arranged on the outer walls of the connecting wires. Therefore, the service time on the sea is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic junction boxes, and particularly relates to a photovoltaic junction box with high waterproof performance. Background Technique

[0002] A photovoltaic junction box is a connecting device between a solar cell array composed of solar cell modules and a solar charging control device. Its main functions are to connect and protect solar photovoltaic modules, connect the electricity generated by solar cells to external circuits, conduct the current generated by photovoltaic modules, and have functions such as safe disconnection, wire connection, moisture-proof, dust-proof, electromagnetic interference prevention, strong earthquake resistance, and aging resistance. At the same time, it can obtain the maximum power from electric energy.

[0003] As disclosed in a Chinese patent: A photovoltaic junction box, application number: CN202020163921.0, includes a junction box body, a conductive component, a bus bar, and an insulating film. The conductive component is arranged inside the junction box body, the junction box body is arranged on the photovoltaic module, an insulating contact surface is arranged between the junction box body and the photovoltaic module, one end of the bus bar is connected to the conductive component, and the other end passes through the insulating contact surface and is connected to the photovoltaic module. The insulating film is coated outside the bus bar, one end of the insulating film contacts the insulating contact surface, and the other end extends into the junction box body. By coating the bus bar with an insulating film, current cannot escape at the intersection of the bus bar and the insulating contact surface, so the creepage distance of the photovoltaic junction box increases the distance between the end of the insulating film and the insulating contact surface. In this way, the photovoltaic junction box can shorten the width of the junction box body while ensuring safety and improve power generation efficiency.

[0004] However, in the above technical solution, the main function of the photovoltaic junction box is to connect and protect solar photovoltaic modules. Therefore, photovoltaic junction boxes are installed wherever there are solar photovoltaic modules. Most solar photovoltaic modules are installed in remote or harsh environments, such as at sea. When the installation location is at sea, due to the humid marine environment, the waterproof performance of the photovoltaic junction box is particularly important. At present, most photovoltaic junction boxes use shell extrusion for sealing, especially at the joint where the connecting wire fits with the connection port, and the sealing performance is low, so it cannot be used at sea for a long time. Content of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] The main purpose of the present utility model is to provide a photovoltaic junction box with high waterproof performance, which can effectively solve the problem that the main function of the photovoltaic junction box in the background technology is to connect and protect solar photovoltaic modules. Therefore, photovoltaic junction boxes are installed wherever there are solar photovoltaic modules. Most solar photovoltaic modules are installed in remote or harsh environments, such as at sea. When the installation location is at sea, due to the humid marine environment, the waterproof performance of the photovoltaic junction box is particularly important. At present, most photovoltaic junction boxes use shell extrusion for sealing, with low sealing performance and unable to be used at sea for a long time.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0009] A photovoltaic junction box with high waterproof performance, including a positive electrode box, an intermediate box, and a negative electrode box. There is a box cover on one side above the positive electrode box, the intermediate box, and the negative electrode box. A number of glue overflow grooves are provided on one side of the positive electrode box, the intermediate box, and the negative electrode box close to the box cover. Rib position support columns are provided at the four corners of the positive electrode box, the intermediate box, and the negative electrode box. Conductors are arranged inside the positive electrode box, the intermediate box, and the negative electrode box. A wiring port is provided on one side of the positive electrode box and the negative electrode box. A connecting wire is arranged inside the wiring port, and an irradiated heat shrinkable sleeve is arranged on the outer wall of the connecting wire.

[0010] Preferably, one end of the wiring port and the connecting wire close to each other is located inside the cavity of the irradiated heat shrinkable sleeve.

[0011] Preferably, the glue overflow groove includes a glue overflow groove base, and a glue overflow port is provided on the glue overflow groove base.

[0012] Preferably, a glue storage groove is provided on one side below the glue overflow port. A number of baffles are fixedly arranged inside the glue storage groove, and a movable baffle is provided on one side above the baffles.

[0013] Preferably, a number of guiding sliding grooves are provided on the outer walls on both sides of the movable baffle, and guiding blocks are arranged inside the guiding sliding grooves.

[0014] Preferably, the glue overflow port is communicated with the glue storage groove, and the guiding block is fixedly connected to the glue overflow groove base.

[0015] Preferably, the height of the baffle far from the conductor is greater than the height of the baffle close to the conductor.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] (1) When the utility model is in use, first install the positive electrode box, the middle box and the negative electrode box at the designated positions, and then heat the irradiated heat-shrinkable sleeve. The irradiated heat-shrinkable sleeve shrinks when heated, so as to use the irradiated heat-shrinkable sleeve to seal and fix the connection between the connecting wire and the wiring port, enhancing the waterproof performance. Subsequently, pour glue into the positive electrode box, the middle box and the negative electrode box, and handle the excess glue through the glue overflow groove to avoid being unable to cover the box lid due to excessive glue pouring. After the glue pouring is completed, cover different box lids on the positive electrode box, the middle box and the negative electrode box, effectively improving the waterproof performance and thus extending the service time at sea.

[0018] (2) By setting the glue overflow groove, the utility model can avoid being unable to cover the box lid due to excessive glue pouring. At the same time, the excess glue can be stored through the glue storage groove to prevent the excess glue from escaping to the outside of the photovoltaic junction box and causing pollution to the outer wall of the photovoltaic junction box or the installation location. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the overall structure of a photovoltaic junction box with high waterproof performance of the utility model;

[0020] Figure 2 is a schematic top view structure diagram of a photovoltaic junction box with high waterproof performance of the utility model;

[0021] Figure 3 is a schematic sectional three-dimensional structure diagram of the glue overflow groove in a photovoltaic junction box with high waterproof performance of the utility model;

[0022] Figure 4 is a schematic sectional structure diagram of the glue overflow groove in a photovoltaic junction box with high waterproof performance of the utility model.

[0023] In the figure: 1. Positive electrode box; 2. Middle box; 3. Negative electrode box; 4. Box lid; 5. Glue overflow groove; 501. Glue overflow groove base; 502. Glue storage groove; 503. Baffle; 504. Movable baffle; 505. Guide chute; 506. Guide block; 507. Glue overflow port; 6. Rib position support column; 7. Conductor; 8. Wiring port; 9. Connecting wire; 10. Irradiated heat-shrinkable sleeve. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0025] Such as Figure 1 and Figure 2As shown in the figure, a photovoltaic junction box with high waterproof performance includes a positive electrode box 1, an intermediate box 2, and a negative electrode box 3. A box cover 4 is provided on one side above the positive electrode box 1, the intermediate box 2, and the negative electrode box 3. A number of glue overflow grooves 5 are provided on one side of the positive electrode box 1, the intermediate box 2, and the negative electrode box 3 close to the box cover 4. Rib position support columns 6 are provided at the four corners of the positive electrode box 1, the intermediate box 2, and the negative electrode box 3. Conductors 7 are provided inside the positive electrode box 1, the intermediate box 2, and the negative electrode box 3. A wiring port 8 is provided on one side of the positive electrode box 1 and the negative electrode box 3. A connecting wire 9 is provided inside the wiring port 8. An irradiation heat shrinkable sleeve 10 is provided on the outer wall of the connecting wire 9.

[0026] As Figure 3 and Figure 4 shown, in another embodiment of the present utility model, the glue overflow groove 5 includes a glue overflow groove base 501, and a glue overflow port 507 is provided on the glue overflow groove base 501;

[0027] A glue storage groove 502 is provided on one side below the glue overflow port 507. A number of baffles 503 are fixedly provided inside the glue storage groove 502. A movable baffle 504 is provided on one side above the baffles 503;

[0028] A number of guiding sliding grooves 505 are provided on the outer walls on both sides of the movable baffle 504. Guide blocks 506 are provided inside the guiding sliding grooves 505. When too much glue is poured, the excess glue enters the glue overflow port 507, and then enters the glue storage groove 502 through the glue overflow port 507. The excess glue is stored through the glue storage groove 502 to prevent the excess glue from escaping to the outside of the photovoltaic junction box and causing pollution to the outer wall of the photovoltaic junction box or the installation location. At the same time, the excess glue is intercepted by the gradually rising baffles 503 and the movable baffle 504 to prevent the excess glue from accidentally flushing out of the glue overflow port 507 during glue pouring. When pouring glue, when the poured glue is really too much, the movable baffle 504 moves along the trajectories of the guiding sliding grooves 505 and the guide blocks 506 in a direction away from the conductor 7, so that the movable baffle 504 is separated from the glue overflow groove base 501, and the glue overflow port 507 will no longer be blocked, and the excess glue can be moved to other places through the glue overflow port 507.

[0029] The working principle of the photovoltaic junction box with high waterproof performance:

[0030] In use, first install the positive electrode box 1, the middle box 2 and the negative electrode box 3 at the designated positions, then connect the connecting wire 9 to the wiring port 8. Subsequently, move the irradiated heat-shrinkable sleeve 10 to the place where the connecting wire 9 and the wiring port 8 are in contact with each other, and then heat the irradiated heat-shrinkable sleeve 10. The irradiated heat-shrinkable sleeve 10 shrinks when heated, so as to seal and fix the connection between the connecting wire 9 and the wiring port 8 by using the irradiated heat-shrinkable sleeve 10. Subsequently, glue is poured into the positive electrode box 1, the middle box 2 and the negative electrode box 3. When too much glue is poured, the excess glue enters the glue overflow port 507, and then enters the glue storage tank 502 through the glue overflow port 507. The excess glue is stored through the glue storage tank 502 to prevent the excess glue from escaping to the outside of the photovoltaic junction box and causing pollution to the outer wall or installation location of the photovoltaic junction box. At the same time, the excess glue is intercepted by the gradually rising baffle 503 and the movable baffle 504 to prevent the excess glue from accidentally flushing to the outside of the photovoltaic junction box through the glue overflow port 507 during glue pouring. When pouring glue, if too much glue is poured, the movable baffle 504 moves along the trajectories of the guiding chute 505 and the guiding block 506 in a direction away from the conductor 7, so that the movable baffle 504 is separated from the glue overflow tank base 501. The glue overflow port 507 will no longer be blocked, and the excess glue can be moved away through the glue overflow port 507, avoiding that the box cover 4 cannot be covered due to too much glue pouring. After the glue pouring is completed, different box covers 4 can be covered on the positive electrode box 1, the middle box 2 and the negative electrode box 3, effectively improving the waterproof performance.

[0031] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is impossible to enumerate all the implementation manners here. Any obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A photovoltaic junction box with high waterproof performance, comprising a positive electrode box (1), an intermediate box (2) and a negative electrode box (3), characterized in that: A box cover (4) is arranged on one side above the positive box (1), the intermediate box (2) and the negative box (3); a plurality of glue overflow grooves (5) are arranged on one side of the positive box (1), the intermediate box (2) and the negative box (3) close to the box cover (4); rib support columns (6) are arranged at four corners of the positive box (1), the intermediate box (2) and the negative box (3); a conductor (7) is arranged inside the positive box (1), the intermediate box (2) and the negative box (3); a wiring port (8) is arranged on one side of the positive box (1) and the negative box (3); a connecting wire (9) is arranged inside the wiring port (8); and a radiation heat shrink tubing (10) is arranged on the outer wall of the connecting wire (9).

2. A photovoltaic junction box with high waterproof performance according to claim 1, characterized in that: The end of the wiring port (8) and the connecting wire (9) that is close to each other is located in the inner cavity of the radiation heat shrinkable sleeve (10).

3. A photovoltaic junction box with high waterproof performance according to claim 2, characterized in that: The glue overflow groove (5) comprises a glue overflow groove base (501), and a glue overflow port (507) is arranged on the glue overflow groove base (501).

4. A photovoltaic junction box with high waterproof performance according to claim 3, characterized in that: A glue storage groove (502) is arranged on one side below the glue overflow port (507), a plurality of baffles (503) are fixedly arranged in the glue storage groove (502), and a movable baffle (504) is arranged on one side above the baffle (503).

5. A photovoltaic junction box with high waterproof performance according to claim 4, characterized in that: A plurality of guide slots (505) are arranged on the outer walls on both sides of the movable baffle (504), and guide blocks (506) are arranged in the guide slots (505).

6. A photovoltaic junction box with high waterproof performance according to claim 5, characterized in that: The glue overflow port (507) is communicated with the glue storage groove (502), and the guide block (506) is fixedly connected to the glue overflow groove base (501).

7. A photovoltaic junction box with high waterproof performance according to claim 6, characterized in that: The height of the baffle (503) far from the conductor (7) is greater than the height of the baffle (503) close to the conductor (7).

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