Junction box for photovoltaic module

Abstract

The utility model discloses a junction box for a photovoltaic module, which relates to the technical field of photovoltaic module construction tools and comprises a box body. Supports are connected to four corners of the box body, a box cover is detachably connected to the box body, a binding post is arranged in the box body, two wiring terminals are connected to the binding post, and wiring mechanisms are connected to the ends, away from the binding post, of the two wiring terminals. The guide rail in the wire guiding mechanism is arranged on the side edge of the through hole, the sliding block is in sliding connection with the guide rail, the threading ring is connected with the box cover through the spring, wires are allowed to flexibly move inside and outside the box body, meanwhile, cables are kept neat and protected, through the design of the wire guiding mechanism, effective management and maintenance of the cables can be achieved, cable disorder is reduced, and the service life of the cables is prolonged. Through the design of the guide rails and the sliding blocks, more ordered cable management can be realized, cable disorder is reduced, cable entanglement or overcrowding is avoided, and the attractiveness and maintainability of the whole system can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component construction tools, in particular to a junction box for a photovoltaic component. Background Art

[0002] A junction box for photovoltaic modules plays a vital role in solar photovoltaic systems. It provides a centralized point for connecting the cell strings within the photovoltaic module and the external circuit to achieve efficient current transmission. The materials and structural design of the junction box need to be able to withstand the harsh conditions of the outdoor environment, such as ultraviolet radiation, temperature fluctuations, and mechanical stress, to ensure long-term stable operation. It may also contain components for voltage and current conversion to adapt to different system requirements. The junction box for photovoltaic modules is a key component for connecting, protecting, and monitoring photovoltaic modules, and is crucial to ensuring the reliability and efficiency of the entire photovoltaic system.

[0003] The Chinese patent, with the publication number CN211981830U, is titled "A junction box for half-cell photovoltaic modules," comprising a box body and a cover. U-shaped wiring holes are provided on opposite sides of the box body. Two uprights are symmetrically fixed to the bottom of the box body, and two telescopic rods are symmetrically fixed to the sides of the uprights. One end of the telescopic rod is fixedly connected to a curved winding plate. This utility model wraps wires around the winding grooves of the curved winding plate, buffering the wires from external forces and preventing them from breaking or detaching from the terminal posts. This avoids the problem of existing photovoltaic junction boxes being too small, where wires can easily detach from the terminal posts when pulled by external forces, potentially damaging internal equipment.

[0004] The shortcomings of the above solution are: although the above solution can prevent the wire from breaking, when in use, the position of the wiring hole is fixed when the wire passes through the wiring hole. The fixed position of the wiring hole limits the entry angle and direction of the wire, which may lead to a lack of flexibility in wiring, making cable management and layout difficult, and there is no heat dissipation mechanism, which may cause the components to overheat, affecting the performance of the electronic components in the junction box, resulting in technical problems such as reduced efficiency or unstable function. Utility Model Content

[0005] The purpose of the utility model is to provide a junction box for photovoltaic modules, so as to solve the technical problems in the prior art that when the wires pass through the wiring holes, the positions of the wiring holes are fixed, and the fixed position of the wiring holes limits the entry angle and direction of the wires, which may lead to a lack of flexibility in wiring, and no heat dissipation mechanism is provided, which may cause the modules to overheat, resulting in reduced efficiency or unstable functions.

[0006] The technical problem to be solved by the present invention can be achieved through the following technical solutions:

[0007] A junction box for a photovoltaic module, comprising a box body;

[0008] The four corners of the box body are connected to supports, the box body is detachably connected to a box cover, a binding post is provided inside the box body, the binding post is connected to two wiring terminals, and the ends of the two wiring terminals away from the binding post are connected to a wiring mechanism;

[0009] Two sensors are arranged inside the box body, and a plurality of heat dissipation holes are opened at the bottom of the box body, and heat sinks are connected between the plurality of heat dissipation holes;

[0010] The box body and the box cover are provided with a wire guide mechanism.

[0011] As a further solution of the present invention: each of the wiring mechanisms includes two support shafts, the two support shafts are connected to the box body, and a winding shaft is connected between the support shafts.

[0012] As a further solution of the present invention: a winding groove is provided on the winding shaft.

[0013] As a further solution of the present invention: a heat dissipation coating is applied to the bottom of the box body.

[0014] As a further solution of the present invention: a plurality of heat dissipation fans are connected to the box body.

[0015] As a further solution of the present invention: the wire mechanism includes a guide rail and a threading ring, the box body and the box cover are provided with through holes, the guide rail is arranged on the side of the through hole, a slider is slidably connected to the guide rail, the threading ring is connected to the end of the slider away from the guide rail, the threading ring can slide on the guide rail, and a spring is connected between the threading ring and the box cover.

[0016] Beneficial effects of the utility model:

[0017] 1. In the wire mechanism of the utility model, the guide rail is arranged on the side of the through hole, the slider is slidably connected to the guide rail, and the wire threading ring is connected to the box cover by a spring, which allows the wire to move flexibly in and out of the box body while keeping the cable neat and protected. The design of the wire mechanism can achieve effective management and maintenance of cables and reduce cable clutter. The design of the guide rail and slider can achieve more orderly cable management, reduce cable clutter, and avoid cable entanglement or overcrowding, which helps to improve the aesthetics and maintainability of the overall system.

[0018] 2. The utility model has two sensors installed inside the box for real-time monitoring and recording of temperature changes. The bottom of the box is coated with a heat dissipation coating to improve the heat conduction efficiency. Heat sinks are connected between the multiple heat dissipation holes to increase the heat dissipation area. The heat dissipation fan is used for active heat dissipation to keep the temperature inside the junction box within a safe range. The effective heat dissipation design can reduce the failure rate caused by overheating, improve the stability of the system and reduce unexpected downtime. By reducing the performance degradation caused by overheating, the junction box can work more efficiently, improve the energy efficiency of the entire photovoltaic system, and reduce long-term operation and maintenance costs by reducing the maintenance requirements caused by overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the box body of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the conductor mechanism in the utility model;

[0023] Figure 4 It is a schematic structural diagram of the back side of the box body in the utility model.

[0024] In the figure: 1. Box body; 2. Box cover; 3. Guide rail; 4. Threading ring; 5. Spring; 6. Through hole; 7. Heat dissipation hole; 8. Binding post; 9. Wiring terminal; 10. Support shaft; 11. Winding shaft; 12. Winding groove; 13. Support; 14. Cooling fan; 15. Heat sink; 16. Heat dissipation coating; 17. Sensor. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 creative efforts are within the scope of protection of the present invention.

[0026] like Figures 1-4 As shown, a junction box for a photovoltaic module includes a box body 1, with supports 13 connected to the four corners of the box body 1, a box cover 2 detachably connected to the box body 1, a terminal post 8 provided inside the box body 1, two terminal blocks 9 connected to the terminal post 8, and a terminal mechanism connected to each end of the two terminal blocks 9 away from the terminal post 8;

[0027] Each of the wiring mechanisms includes two support shafts 10, the two support shafts 10 are connected to the box body 1, a winding shaft 11 is connected between the support shafts 10, and a winding groove 12 is provided on the winding shaft 11;

[0028] Two sensors 17 are provided inside the box body 1. A heat dissipation coating 16 is applied to the bottom of the box body 1. A plurality of heat dissipation holes 7 are provided at the bottom of the box body 1. Heat dissipation fins 15 are connected between the plurality of heat dissipation holes 7. A plurality of heat dissipation fans 14 are connected to the box body 1.

[0029] The box body 1 and the box cover 2 are provided with a wire mechanism, which includes a guide rail 3 and a threading ring 4. A through hole 6 is opened on the box body 1 and the box cover 2. The guide rail 3 is arranged on the side of the through hole 6. A slider is slidably connected to the guide rail 3. The threading ring 4 is connected to the end of the slider away from the guide rail 3. The threading ring 4 can slide on the guide rail 3. A spring 5 is connected between the threading ring 4 and the box cover 2.

[0030] Working principle of the present invention: The design of the junction box for photovoltaic modules integrates multiple functions, aiming to improve the reliability of electrical connection, heat dissipation efficiency and convenience of installation and maintenance. The box body 1 is the main part of the junction box, and four supports 13 are connected to it to support the box body 1. The box cover 2 can be detachably connected to the box body 1 for easy maintenance and installation. A terminal post 8 is provided inside the box body 1, and two terminal blocks 9 are connected to the terminal post 8. These terminals are used to connect the battery string of the photovoltaic module and the external circuit. The end of each terminal block 9 away from the terminal post 8 is connected to a wiring mechanism. The winding groove 12 on the winding shaft 11 is used to fix and organize the cable to ensure the stability of the connection. Two sensors 17 are installed inside the box body 1 for real-time monitoring and recording of temperature changes. The heat dissipation coating 16 on the bottom of the box body 1 is used to improve the heat conduction efficiency. Heat sinks 15 are connected between the multiple heat dissipation holes 7 to increase the heat dissipation area. The heat dissipation fan 14 is used to actively dissipate heat to keep the temperature inside the junction box within a safe range.

[0031] In the wire mechanism, the guide rail 3 is arranged on the side of the through hole 6, the slider is slidably connected to the guide rail 3, and the wire ring 4 is connected to the box cover 2 by a spring 5, which allows the wire to move flexibly in and out of the box body 1 while keeping the cable neat and protected. Through the design of the wire mechanism, effective management and maintenance of the cable can be achieved, cable clutter can be reduced, and the reliability of the system can be improved. The detachable design of the box cover 2 makes installation and maintenance more convenient and facilitates maintenance or replacement.

[0032] The above describes an embodiment of the present invention in detail. However, the content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A junction box for a photovoltaic module, comprising a box body (1); characterized in that: The four corners of the box body (1) are connected to supports (13), the box body (1) is detachably connected to a box cover (2), a terminal block (8) is provided inside the box body (1), two terminal blocks (9) are connected to the terminal block (8), and the ends of the two terminal blocks (9) away from the terminal block (8) are both connected to a wiring mechanism; Two sensors (17) are provided inside the box body (1), a plurality of heat dissipation holes (7) are provided at the bottom of the box body (1), and heat dissipation fins (15) are connected between the plurality of heat dissipation holes (7); The box body (1) and the box cover (2) are provided with a wire guide mechanism.

2. A junction box for a photovoltaic module according to claim 1, characterized in that: Each of the wiring mechanisms comprises two support shafts (10), the two support shafts (10) are connected to the box body (1), and a winding shaft (11) is connected between the support shafts (10).

3. A junction box for a photovoltaic module according to claim 2, characterized in that: The winding shaft (11) is provided with a winding groove (12).

4. A junction box for a photovoltaic module according to claim 1, characterized in that: The bottom of the box body (1) is coated with a heat dissipation coating (16).

5. The junction box for a photovoltaic module according to claim 1, characterized in that: A plurality of heat dissipation fans (14) are connected to the box body (1).

6. A junction box for a photovoltaic assembly according to claim 1, characterized in that: The wire guide mechanism comprises a guide rail (3) and a threading ring (4); a through hole (6) is provided on the box body (1) and the box cover (2); the guide rail (3) is arranged on the side of the through hole (6); a slider is slidably connected to the guide rail (3); the threading ring (4) is connected to the end of the slider away from the guide rail (3); the threading ring (4) can slide on the guide rail (3); and a spring (5) is connected between the threading ring (4) and the box cover (2).

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