Photovoltaic module junction box

Abstract

The utility model provides a photovoltaic module junction box, which belongs to the technical field of photovoltaic cells, and comprises a junction box main body, a connector and a cable, the cable is connected between a diode inside the junction box main body and the connector outside the junction box main body, the cable is a spiral cable, the spiral cable is provided with a sucker, the sucker is adsorbed on a back plate of a photovoltaic module, and the connector is connected with the spiral cable. And fixing and restraining the spiral cable. According to the utility model, the sucker is adopted to fix the cable on the back plate, the fixing mode is simple and convenient, and compared with the mode of fixing by adopting a wire clamp or a rolling belt, the labor cost is saved, and the installation efficiency is improved; the cable is a spiral cable, the spiral cable can stretch out and draw back in the length direction, and certain buffering can be achieved during vibration and wind blowing, so that the risk of loosening caused by left-right shaking abrasion of the connecting positions of the two ends of the cable is avoided, and the firmness of cable connection and the stability of current transmission are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic cell technology, and specifically relates to a photovoltaic module junction box. Background Technology

[0002] The main function of the junction box is to connect the solar photovoltaic module and the load. All the current from the photovoltaic module is conducted to the terminal block through the busbar, and then to the electrical equipment through the junction box and cables. If the cables are not connected effectively, the current will not be able to be discharged. The cables play a very important role in the junction box.

[0003] A junction box typically consists of a junction box body, cables, and connectors. One end of the cable passes through a wiring hole on the junction box body and connects to a diode inside the junction box body, while the other end connects to a connector outside the junction box body.

[0004] Because the junction box is located on the back of the photovoltaic module, which is a smooth backplate (usually glass), the cables connected to the junction box cannot be secured to the backplate. Currently, the commonly used cables contain 0.02mm diameter fine copper wires, typically around 54 wires. Since the cables are straight and rigid, they lack elasticity along their length, resulting in a rigid connection between the junction box and the electrical equipment. During use, tape or cable clips are needed to secure the cables. Furthermore, the cable length between the junction box and the electrical equipment is limited. When the photovoltaic module is subjected to vibration or wind, the cables deform, leading to loose connections, intermittent connections, and other unstable situations, thus affecting current transmission. Utility Model Content

[0005] This utility model provides a photovoltaic module junction box, which aims to solve the problem that the junction box cables cannot be fixed on the back panel of the photovoltaic module, resulting in cable deformation, loose connections, and other unstable connections, thus affecting the current transmission effect.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a photovoltaic module junction box is provided, including a junction box body, a connector and a cable. The cable connects a diode inside the junction box body to the connector outside. The cable is a spiral cable, and a suction cup is provided on the spiral cable. The suction cup is adsorbed onto the back plate of the photovoltaic module to fix and constrain the spiral cable.

[0007] In one possible implementation, the suction cup includes a suction cup body and an annular cord buckle, the suction cup body being fixed to the annular cord buckle, the annular cord buckle being sleeved on the spiral cable, and the annular cord buckle being able to be positioned between two adjacent spiral segments of the spiral cable.

[0008] In one possible implementation, a connecting post is provided on the outer ring of the annular cord buckle, and the suction cup body is provided with a connecting sleeve that can be tightly fitted onto the connecting post.

[0009] In one possible implementation, the connecting post is provided with an anti-slip structure.

[0010] In one possible implementation, the anti-slip structure includes any one of the following: spiral protrusions disposed on the connecting post, protrusions evenly distributed on the surface of the connecting post, or annular protrusions evenly distributed along the length direction of the connecting post.

[0011] In one possible implementation, the annular cord buckle is made of rubber, plastic, or silicone, and the suction cup body is made of rubber or silicone.

[0012] In one possible implementation, the suction cup body and the annular cord buckle are integrally formed.

[0013] In one possible implementation, the suction cup body is glued to the annular cord buckle.

[0014] Compared with the prior art, the photovoltaic module junction box provided by this utility model has the following advantages: The use of suction cups to attach the spiral cable to the backplate of the photovoltaic module provides constraint on the spiral cable, preventing vibration or wind-blown cable deformation that could lead to loose connections or insecure connections. This ensures the firmness and reliability of the cable connection at both ends, guaranteeing the stability and continuity of current transmission. The suction cups also adhere easily to the smooth backplate, eliminating the need for corresponding connection structures and preserving the integrity of the backplate, thus maintaining the integrity of the photovoltaic module. Fixing the cable to the backplate using the suction cup body is simple and convenient, and compared to wire clips, it eliminates the need for drilling holes in the backplate and provides a more secure fixation than simple tape application. The spiral cable used in this application is elastic in its length direction, providing cushioning against vibration and wind, thus preventing the connection points from swaying and wearing down, further ensuring the firmness of the cable connection and the stability of current transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the photovoltaic module junction box provided in an embodiment of the present utility model;

[0016] Figure 2 A schematic diagram of the suction cup provided in an embodiment of this utility model;

[0017] Figure 3A schematic diagram of the structure of the annular rope buckle provided in the embodiment of this utility model. Figure 1 ;

[0018] Figure 4 A schematic diagram of the structure of the annular rope buckle provided in the embodiment of this utility model. Figure 2 ;

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Junction box body; 2. Cable; 3. Connector; 4. Suction cup body; 41. Connecting sleeve; 5. Ring rope buckle; 51. Connecting post; 52. Anti-slip structure. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Please refer to the following: Figure 1 and Figure 2 The photovoltaic module junction box provided by this utility model will now be described. The photovoltaic module junction box includes a junction box body 1, a connector 3, and a cable 2. The cable 2 connects the diode inside the junction box body 1 to the connector 3 on the outside. The cable 2 is a spiral cable, and a suction cup is provided on the spiral cable. The suction cup is attached to the back plate of the photovoltaic module to fix and constrain the spiral cable.

[0023] The photovoltaic module junction box provided by this utility model has the following advantages compared with the prior art:

[0024] First, by using suction cups to attach the spiral cable to the back panel of the photovoltaic module, the spiral cable can be constrained, preventing vibration or wind from causing the cable 2 to sway and deform, resulting in loose connections, poor connections, or other unstable connections. This ensures the firmness and reliability of the connection at both ends of the cable 2, and guarantees the stability and continuity of current transmission.

[0025] Secondly, the suction cups can easily adhere to the smooth back panel, and there is no need to set up a corresponding connection structure on the back panel, which will not damage the integrity of the back panel and ensure the integrity of the photovoltaic module.

[0026] Third, the cable 2 is fixed to the back panel using suction cups. This fixing method is simple and convenient. Compared with the fixing method using cable clips or tape, there is no need to drill holes in the back panel to install cable clips, saving labor costs and improving installation efficiency. Compared with the simple fixing method of using tape, the fixing is more secure.

[0027] Fourth, the cable 2 in this application uses a spiral cable. The spiral cable can stretch and contract along its length, and can provide a certain buffer when subjected to vibration and wind, thereby avoiding the risk of loosening due to swaying and wear at the connection points at both ends of the cable 2. This further ensures the firmness of the connection of the cable 2 and the stability of the current transmission.

[0028] The spiral cable used in this application can have a single copper wire or multiple copper wires inside. Preferably, when the internal copper wire is a single copper wire, its diameter is set to 2 mm, with a deviation not exceeding ±0.01 mm. This can be adjusted according to the specific current value; typically, for every 1A increase in current, the copper wire diameter needs to be increased by 0.01 mm.

[0029] In some embodiments, see Figure 1 and Figure 2 As shown, the suction cup includes a suction cup body 4 and an annular cord buckle 5. The suction cup body 4 is fixed to the annular cord buckle 5, which is sleeved on the spiral cable. The annular cord buckle 5 can be positioned between two adjacent spiral segments of the spiral cable. This application uses an annular cord buckle 5 sleeved on the spiral cable. The annular cord buckle 5 can be positioned between two adjacent spiral segments of the spiral cable, therefore, the position of the annular cord buckle 5 on the spiral cable does not require additional structures, ensuring the certainty of the fixing point. Moreover, by moving the annular cord buckle 5, a suitable point can be selected to fix the spiral cable, making position adjustment and fixation very convenient.

[0030] Specifically, the diameter of the suction cup body 4 is generally 1.5 times the diameter of the cable 2. The quantity should be one every 5 centimeters. The diameter of the ring-shaped cord buckle 5 should be slightly larger than the diameter of the cable 2 to facilitate adjustment of the suction cup body 4.

[0031] When fixing cable 2, use the rope buckle to move the suction cup body 4 to a reasonable position, and then attach the suction cup body 4 to the back panel of the photovoltaic module. There is no need to use cable ties or wire clips for fixing, which saves costs and reduces labor costs later.

[0032] In some embodiments, see Figures 2 to 4 The annular cord buckle 5 has a connecting post 51 on its outer ring, and the suction cup body 4 has a connecting sleeve 41 that can be tightly fitted onto the connecting post 51. In this embodiment, the annular cord buckle 5 and the suction cup body 4 are detachably connected, manufactured separately and then assembled together. Since the suction cup body 4 is an elastic flexible part, the connecting sleeve 41 on the suction cup body 4 can be tightly fitted onto the connecting post 51 of the annular cord buckle 5. In actual manufacturing, the material hardness of the annular cord buckle 5 is higher than that of the suction cup body 4, and the annular cord buckle 5 has a strong resistance to deformation, while the suction cup body 4 needs to have high elasticity.

[0033] In some embodiments, see Figure 3 and Figure 4An anti-slip structure 52 is provided on the connecting post 51 to improve the fit between the suction cup body 4 and the connecting post 51.

[0034] In some embodiments, see Figure 3 and Figure 4 The anti-slip structure 52 includes any one of the following: spiral protrusions on the connecting post 51, protrusions evenly distributed on the surface of the connecting post 51, or annular protrusions evenly distributed along the length of the connecting post 51. The anti-slip structure 52 increases the friction between the connecting sleeve 41 and the connecting post 51, thereby improving the firmness of the connection between the suction cup body 4 and the annular rope buckle 5.

[0035] In some embodiments, the annular cord buckle 5 is made of rubber, plastic, or silicone, and the suction cup body 4 is made of rubber or silicone. The suction cup body 4 has better elasticity and lower hardness than the annular cord buckle 5.

[0036] As another embodiment of the fastener, the suction cup body 4 and the annular rope buckle 5 are integrally formed.

[0037] As another embodiment of the fastener, the suction cup body 4 is glued to the annular cord buckle 5.

[0038] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A photovoltaic module junction box, comprising a junction box body (1), a connector (3), and a cable (2), wherein the cable (2) connects a diode inside the junction box body (1) to the connector (3) outside, characterized in that, The cable (2) is a spiral cable with a suction cup on it. The suction cup is attached to the back plate of the photovoltaic module to fix and constrain the spiral cable.

2. The photovoltaic module junction box as described in claim 1, characterized in that, The suction cup includes a suction cup body (4) and an annular rope buckle (5). The suction cup body (4) is fixed on the annular rope buckle (5). The annular rope buckle (5) is sleeved on the spiral cable. The annular rope buckle (5) can be limited between two adjacent spiral segments of the spiral cable.

3. The photovoltaic module junction box as described in claim 2, characterized in that, The outer ring of the annular rope buckle (5) is provided with a connecting post (51), and the suction cup body (4) is provided with a connecting sleeve (41) that can be tightly fitted to the connecting post (51).

4. The photovoltaic module junction box as described in claim 3, characterized in that, The connecting column (51) is provided with an anti-slip structure (52).

5. The photovoltaic module junction box as described in claim 4, characterized in that, The anti-slip structure (52) includes any one of the following: a spiral protrusion disposed on the connecting post (51), a protrusion evenly distributed on the surface of the connecting post (51), or an annular protrusion evenly distributed along the length direction of the connecting post (51).

6. The photovoltaic module junction box as described in claim 2, characterized in that, The annular cord buckle (5) is made of rubber, plastic or silicone, and the suction cup body (4) is made of rubber or silicone.

7. The photovoltaic module junction box as described in claim 2, characterized in that, The suction cup body (4) and the annular rope buckle (5) are integrally formed.

8. The photovoltaic module junction box as described in claim 2, characterized in that, The suction cup body (4) is glued to the annular rope buckle (5).

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