Photovoltaic junction box

Abstract

The photovoltaic junction box comprises a junction box body and a buckle, a circuit device is installed in the junction box body, a cable is arranged on one side of the junction box body, one end of the cable is electrically connected with the circuit device, and the other end of the cable extends to the outer side of the junction box body. A first groove is formed in the junction box body, a second groove is formed in the buckle, a first transverse convex rib is arranged in the first groove in the radial direction, planes at the two ends of the first transverse convex rib incline inwards, a second transverse convex rib is arranged in the second groove in the radial direction, and planes at the two ends of the second transverse convex rib incline inwards. When the junction box body and the buckle are buckled, a first included angle space is formed at the planes of the two ends of the first transverse convex rib and the second transverse convex rib, and through the arrangement of the first included angle space in the structure, a certain redundant space can be provided for the cable, the cable sheath is prevented from being extruded and damaged, and the cable is further protected.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaics, and in particular to a photovoltaic junction box. Background Technology

[0002] A photovoltaic (PV) bypass protection module is a crucial component of PV modules, primarily used to improve the reliability and efficiency of the PV system. When a cell in a PV string experiences current mismatch due to shading, damage, or performance degradation, the bypass module provides a low-resistance bypass path for that cell, allowing current to flow around the faulty cell. This reduces hot spot effects and maintains the overall power generation efficiency of the PV module. The bypass protection module consists of a diode and a conductor electrically connected to the diode.

[0003] Currently, bypass protection modules are mostly installed inside junction boxes. These modules connect to external inverters via cables, which are secured to the junction box with clips that serve to hold and protect the cables. However, many clips do not currently hold the cables securely, allowing them to be pulled by tension and causing scratches on the cable sheath, thus reducing the cable's lifespan.

[0004] Therefore, the design of the junction box clips is related to the performance of the cables, which in turn affects the use of the bypass protection module and the solar panels. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a photovoltaic junction box that can protect cables.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a photovoltaic junction box, including a junction box body and a buckle. A circuit device is installed inside the junction box body. A cable is provided on one side of the junction box body. One end of the cable is electrically connected to the circuit device, and the other end of the cable extends to the outside of the junction box body. A first groove is provided on the junction box body, and a second groove is provided on the buckle. A first transverse rib is provided radially inside the first groove. The planes at both ends of the first transverse rib are inclined inward. A second transverse rib is provided radially inside the second groove to cooperate with the first transverse rib. The planes at both ends of the second transverse rib are inclined inward. When the junction box body and the buckle are fastened, the first groove and the second groove cooperate to wrap the cable. A first included angle space is formed at the planes at both ends of the first transverse rib and the second transverse rib.

[0007] Furthermore, the number of the first transverse rib and the second transverse rib is not less than 2.

[0008] Furthermore, the first transverse rib is located at the end of the first groove near the circuit device, and the second transverse rib is located at the end of the second groove near the circuit device.

[0009] Furthermore, a third transverse rib is provided in the first groove, and a fourth transverse rib is provided in the second groove to cooperate with the third transverse rib. The third transverse rib is located at the end of the first groove away from the circuit device, and the fourth transverse rib is located at the end of the second groove away from the circuit device.

[0010] Furthermore, the planes at both ends of the third and fourth transverse ribs are inclined inward. When the junction box body and the buckle are fastened, the first groove and the second groove cooperate to wrap the cable, and a second included angle space is formed at the planes at both ends of the third and fourth transverse ribs.

[0011] Furthermore, the planes at both ends of the first, second, third, and fourth transverse ribs are rounded.

[0012] Furthermore, the first groove, the second groove, the first transverse rib, the second transverse rib, the third transverse rib, and the fourth transverse rib are all semi-circular structures.

[0013] Furthermore, the radius of the first and second transverse ribs is R1, and the radius of the third and fourth transverse ribs is R2, where R1 is less than R2.

[0014] Furthermore, the first and second grooves are provided with several longitudinal ribs along the axial direction.

[0015] Furthermore, the buckle is equipped with an ultrasonic welding rod, and the buckle is welded to the junction box body.

[0016] Furthermore, the junction box body is provided with a top cover, and the top cover is provided with a plurality of snap-fit ​​devices for fixing to the junction box body, and the plurality of snap-fit ​​devices on the top cover are arranged in a centrally symmetrical manner.

[0017] The upper cover is provided with an opening structure for opening the latching device, and the opening structure is arranged in a centrally symmetrical manner.

[0018] Furthermore, the junction box body has a skirt at the bottom and an identifier on the top cover, which are arranged symmetrically in the center of the top cover.

[0019] The beneficial effects of this utility model are:

[0020] 1. The buckle design in this structure can protect the cable, while the first and second transverse ribs can enhance the cable's resistance to detachment.

[0021] 2. In this structure, a first included angle space is formed at the two ends of the first and second transverse ribs, which can provide the cable with a certain amount of redundant space to prevent the cable sheath from being squeezed and damaged, thereby protecting the cable.

[0022] 3. The addition of several longitudinal ribs in this structure can increase the anti-detachment force on the cable. Attached Figure Description

[0023] Figure 1 This is an exploded view of the photovoltaic junction box according to an embodiment of this application.

[0024] Figure 2 This is a bottom view of the junction box body of the photovoltaic junction box according to an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the latch of the photovoltaic junction box according to an embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the junction box body of the photovoltaic junction box according to an embodiment of this application.

[0027] Figure 5 for Figure 4 A schematic diagram of the cross-section at point A.

[0028] Figure 6 for Figure 4 A schematic diagram of the cross-section at point B.

[0029] Figure 7 This is a schematic diagram of another form of the buckle according to an embodiment of this application.

[0030] The components in the diagram are labeled as follows: junction box body 1, first groove 11, skirt 12, cable 2, buckle 3, second groove 31, ultrasonic welding rod 32, first transverse rib 41, second transverse rib 42, first included angle space 43, third transverse rib 44, fourth transverse rib 45, second included angle space 46, longitudinal rib 47, semi-circular structure 48, rounded corner structure 49, circuit components 5, top cover 6, snap-fit ​​device 61, opening structure 62. Detailed Implementation

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 3 and Figure 5As shown, an embodiment of this application discloses a photovoltaic junction box, characterized in that it includes a junction box body 1 and a buckle 3. A circuit device 5 is installed inside the junction box body 1. A cable 2 is provided on one side of the junction box body 1. One end of the cable 2 is electrically connected to the circuit device 5, and the other end of the cable 2 extends to the outside of the junction box body 1. A first groove 11 is provided on the junction box body 1, and a second groove 31 is provided on the buckle 3. A first transverse rib 41 is provided radially inside the first groove 11, and the planes at both ends of the first transverse rib 41 are inclined inward. A second transverse rib 42 is provided radially inside the second groove 31 to cooperate with the first transverse rib 41, and the planes at both ends of the second transverse rib 42 are inclined inward. When the junction box body 1 and the buckle 3 are fastened, the first groove 11 and the second groove 31 cooperate to wrap the cable 2, and a first included angle space 43 is formed at the planes at both ends of the first transverse rib 41 and the second transverse rib 42.

[0033] In practical use, one end of the cable 2 is inserted into the junction box body 1, and the other end of the cable 2 is connected to the circuit device 5 inside the junction box body 1. After the connection is completed, the buckle 3 is fastened to the junction box body 1. During the fastening process, the first groove 11 and the second groove 31 gradually approach each other and finally cooperate to wrap around the cable 2. At this time, the first included angle space 43 formed at the two ends of the first transverse rib 41 and the second transverse rib 42 provides a certain amount of redundant space for the cable 2, so that the outer sheath of the squeezed cable 2 can be inserted into the included angle space.

[0034] The above-mentioned structural design not only improves the stability of cable 2, but also prevents cable 2 from being damaged due to excessive compression, thereby extending the service life of cable 2. At the same time, the setting of the first transverse rib 41 and the second transverse rib 42 enhances the fixing effect of the buckle 3 on cable 2, improves the anti-derailment force of cable 2, and ensures the stability of cable 2 in the junction box.

[0035] In this embodiment, as Figure 1 and Figure 3 As shown, the number of the first transverse rib 41 and the second transverse rib 42 is not less than 2.

[0036] Specifically, when the number of the first transverse rib 41 and the second transverse rib 42 is set to two or more, the fixing effect on the cable 2 can be further enhanced. The number of the first transverse rib 41 and the second transverse rib 42 can be 2, 3, 4, etc.

[0037] In this embodiment, as Figure 2 and Figure 3 As shown, the first transverse rib 41 is located at the end of the first groove 11 near the circuit device 5, and the second transverse rib 42 is located at the end of the second groove 31 near the circuit device 5.

[0038] Specifically, the positions of the first transverse rib 41 and the second transverse rib 42 are closer to the connection end between the cable 2 and the circuit device 5, thereby preventing the connection end between the cable 2 and the circuit device 5 from shaking and preventing the connection end between the cable 2 and the circuit device 5 from breaking.

[0039] In this embodiment, as Figure 2 and Figure 3 As shown, a third transverse rib 44 is provided in the first groove 11, and a fourth transverse rib 45 that cooperates with the third transverse rib 44 is provided in the second groove 31. The third transverse rib 44 is located at the end of the first groove 11 away from the circuit device 5, and the fourth transverse rib 45 is located at the end of the second groove 31 away from the circuit device 5.

[0040] Specifically, the third transverse rib 44 and the fourth transverse rib 45 further enhance the fixing effect of the junction box body 1 and the buckle 3 on the cable 2. When the junction box body 1 and the buckle 3 are fastened, the third transverse rib 44 and the fourth transverse rib 45 make the cable 2 more securely fixed in the junction box, improving the anti-derailment force of the cable 2.

[0041] In this embodiment, as Figure 6 As shown, the planes at both ends of the third transverse rib 44 and the fourth transverse rib 45 are inclined inward. When the junction box body 1 and the buckle 3 are fastened, the first groove 11 and the second groove 31 cooperate to wrap the cable 2, and the planes at both ends of the third transverse rib 44 and the fourth transverse rib 45 form a second included angle space 46.

[0042] Specifically, when the junction box body 1 and the buckle 3 are fastened together, the second included angle space 46 formed at the two ends of the third transverse rib 44 and the fourth transverse rib 45 provides a certain amount of redundant space for the cable 2, so that the outer sheath of the squeezed cable 2 can be inserted into the included angle space, thereby avoiding damage to the cable 2 due to excessive compression, and thus extending the service life of the cable 2.

[0043] In this embodiment, as Figure 7 As shown, the planes at both ends of the first transverse rib 41, the second transverse rib 42, the third transverse rib 44, and the fourth transverse rib 45 are rounded corner structures 49.

[0044] Specifically, the rounded corner structure 49 is designed to fit snugly against the cable, which effectively prevents damage to the cable sheath and ensures good protection for the cable.

[0045] In this embodiment, as Figure 3As shown, the first groove 11, the second groove 31, the first transverse rib 41, the second transverse rib 42, the third transverse rib 44 and the fourth transverse rib 45 are all semi-circular structures 48.

[0046] Specifically, the semi-circular structure 48 not only facilitates the fixing of cable 2, but also makes the fit between the components tighter, improving the structural strength of the entire photovoltaic junction box. At the same time, the protruding ribs of the semi-circular structure can better adapt to the shape of cable 2, reducing friction between cable 2 and the ribs, further protecting cable 2.

[0047] In this embodiment, as Figure 5 and Figure 6 The radius of the first transverse rib 41 and the second transverse rib 42 is R1, and the radius of the third transverse rib 44 and the fourth transverse rib 45 is R2, where R1 is less than R2.

[0048] Specifically, the different radii allow each rib to generate different clamping forces when fixing cable 2. Since the outer end of cable 2 needs to be bent, the area formed by the third and fourth transverse ribs 44 and 45 needs to allow for some space for cable 2 to move. Therefore, the radius R2 of the third and fourth transverse ribs 44 and 45 is designed to be slightly larger to provide more room for cable 2 to move and reduce friction and compression when cable 2 is bent. The first and second transverse ribs 41 and 42 are closer to the connection end between cable 2 and circuit device 5, and the requirements for fixing cable 2 are higher. Therefore, the radius R1 is designed to be smaller to increase the clamping force between the ribs and cable 2, ensuring the stability of the cable 2 connection.

[0049] In this embodiment, as Figures 1 to 3 As shown, the first groove 11 and the second groove 31 are provided with a plurality of longitudinal ribs 47 along the axial direction.

[0050] Specifically, the longitudinal rib 47 further enhances the fixing effect of the junction box body 1 and the buckle 3 on the cable 2. When the cable 2 is clamped between the first groove 11 and the second groove 31, the longitudinal rib 47 can effectively prevent the cable 2 from sliding in the axial direction, thereby improving the anti-detachment force of the cable 2.

[0051] In this embodiment, as Figure 3 As shown, the buckle 3 is provided with an ultrasonic welding rod 32, and the buckle 3 is welded to the junction box body 1.

[0052] Specifically, the ultrasonic welding rod 32 makes the connection between the clip 3 and the junction box body 1 more secure and less prone to loosening, further improving the structural stability and service life of the entire photovoltaic junction box. At the same time, ultrasonic welding, as a pollution-free welding method, aligns with modern environmental protection principles, which is beneficial for the promotion and application of the product.

[0053] In this embodiment, as Figure 1 As shown, the junction box body 1 is provided with an upper cover 6, and the upper cover 6 is provided with a plurality of snap-fit ​​devices 61 for fixing to the junction box body 1. The plurality of snap-fit ​​devices 61 on the upper cover 6 are arranged in a centrally symmetrical manner.

[0054] The upper cover 6 is provided with an opening structure 62 for opening the latching device 61, and the opening structure 62 is arranged in a centrally symmetrical manner.

[0055] Specifically, the design of the top cover 6 not only facilitates the opening and closing of the junction box body 1, but also improves the sealing performance of the junction box body 1, preventing dust, moisture, and other impurities from entering the junction box body 1 and affecting the normal operation of the circuit components 5. Simultaneously, the centrally symmetrical arrangement of the snap-fit ​​device 61 and the opening structure 62 makes the opening and closing of the top cover 6 more stable, avoiding damage caused by uneven force. Furthermore, the central symmetry of the snap-fit ​​device 61 and the opening structure 62 also allows for direct installation of the top cover 6 and the junction box body 1, eliminating the need to consider the orientation of the top cover 6 during installation, thus making the installation of the top cover 6 more convenient.

[0056] In this embodiment, as Figure 1 As shown, the junction box body 1 has a skirt 12 at the bottom and an identifier on the top cover 6, which are arranged symmetrically in the center on the top cover 6.

[0057] Specifically, the skirt 12 in this structure increases the contact area between the junction box and the solar panel, allowing the junction box to be more stably mounted on the solar panel. Simultaneously, the markings facilitate the installation of the top cover 6, preventing it from being installed backwards, and also make it easier for workers to identify and install the junction box, improving the overall aesthetics and practicality of the photovoltaic system. Furthermore, the markings can also indicate key information such as the junction box model and production date, facilitating subsequent maintenance and replacement.

[0058] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A photovoltaic junction box, characterized in that: The device includes a junction box body (1) and a buckle (3). A circuit device (5) is installed inside the junction box body (1). A cable (2) is provided on one side of the junction box body (1). One end of the cable (2) is electrically connected to the circuit device (5), and the other end of the cable (2) extends to the outside of the junction box body (1). A first groove (11) is provided on the junction box body (1), and a second groove (31) is provided on the buckle (3). A first transverse rib (4) is provided radially inside the first groove (11). 1) The planes at both ends of the first transverse rib (41) are inclined inward. The second groove (31) is radially provided with a second transverse rib (42) that cooperates with the first transverse rib (41). The planes at both ends of the second transverse rib (42) are inclined inward. When the junction box body (1) and the buckle (3) are fastened, the first groove (11) and the second groove (31) cooperate to wrap the cable (2). The planes at both ends of the first transverse rib (41) and the second transverse rib (42) form a first included angle space (43).

2. The photovoltaic junction box as described in claim 1, characterized in that: The number of the first transverse rib (41) and the second transverse rib (42) is not less than 2.

3. The photovoltaic junction box as described in claim 1, characterized in that: The first transverse rib (41) is located on the side of the first groove (11) near the circuit device (5), and the second transverse rib (42) is located on the side of the second groove (31) near the circuit device (5).

4. The photovoltaic junction box as described in claim 1, characterized in that: The first groove (11) is provided with a third transverse rib (44), and the second groove (31) is provided with a fourth transverse rib (45) that cooperates with the third transverse rib (44). The third transverse rib (44) is located on the side of the first groove (11) away from the circuit device (5), and the fourth transverse rib (45) is located on the side of the second groove (31) away from the circuit device (5).

5. The photovoltaic junction box as described in claim 4, characterized in that: The planes at both ends of the third transverse rib (44) and the fourth transverse rib (45) are inclined inward. When the junction box body (1) and the buckle (3) are fastened, the first groove (11) and the second groove (31) cooperate to wrap the cable (2), and the planes at both ends of the third transverse rib (44) and the fourth transverse rib (45) form a second included angle space (46).

6. The photovoltaic junction box as described in claim 4, characterized in that: The planes at both ends of the first transverse rib (41), the second transverse rib (42), the third transverse rib (44), and the fourth transverse rib (45) are rounded.

7. The photovoltaic junction box as described in claim 4, characterized in that: The first groove (11), the second groove (31), the first transverse rib (41), the second transverse rib (42), the third transverse rib (44) and the fourth transverse rib (45) are all semi-circular structures.

8. The photovoltaic junction box as described in claim 6, characterized in that: The radius of the first transverse rib (41) and the second transverse rib (42) is R1, and the radius of the third transverse rib (44) and the fourth transverse rib (45) is R2, where R1 is less than R2.

9. The photovoltaic junction box as described in claim 1, characterized in that: The first groove (11) and the second groove (31) are provided with a plurality of longitudinal ribs (47) along the axial direction.

10. The photovoltaic junction box as described in claim 1, characterized in that: The junction box body (1) is provided with a top cover (6), and the top cover (6) is provided with a plurality of snap-fit ​​devices (61) for fixing to the junction box body (1). The plurality of snap-fit ​​devices (61) on the top cover (6) are arranged in a centrally symmetrical manner. The upper cover (6) is provided with an opening structure (62) for opening the latching device (61), and the opening structure (62) is arranged in a centrally symmetrical manner.

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