A photovoltaic junction box

Abstract

This utility model discloses a photovoltaic junction box, including a box body and a box cover; the outer side wall of the box body is provided with a first fixing member; the box cover has a mounting cavity, and the side wall of the mounting cavity is provided with a second fixing member; when the box body is embedded and installed into the mounting cavity, the first fixing member and the second fixing member cooperate to lock the box body and the box cover together. The photovoltaic junction box provided by this utility model has a box cover installed in an external wrapping form with the box body, which effectively improves the lateral impact resistance of the photovoltaic junction box, and at the same time, with the all-round internal locking, the stability of the connection between the box cover and the box body is effectively improved.

Description

Technical Field

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

[0002] The market prospects for photovoltaic (PV) junction boxes are promising. With the rapid growth of global PV installations, the market demand for junction boxes will continue to increase. PV junction boxes are a crucial component of solar PV systems, primarily functioning to connect and protect the current generated by solar cell modules. A PV junction box mainly consists of a cover, a body, potting compound, and bypass diodes. The cover and body primarily protect the internal bypass diodes and connecting circuits. The potting compound provides a seal, and the bypass diodes bypass the circuits where hot spots occur in the PV module, protecting the module from safety risks.

[0003] Chinese patent (publication number CN208046563U) discloses a split photovoltaic junction box and photovoltaic module. The box cover is an end cap type covering the box body, and the box cover and the box body are locked and fixed by a single external buckle. The stability and sealing of the connection are not good, and the impact resistance also needs to be investigated.

[0004] Based on this, the present invention proposes a photovoltaic junction box to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a photovoltaic junction box that improves the impact resistance of the photovoltaic junction box and the stability and sealing of the connection between its cover and body.

[0006] To solve the above-mentioned technical problems, this utility model provides a photovoltaic junction box, including a box body and a box cover;

[0007] The outer side wall of the box is provided with a first fixing member around its perimeter;

[0008] The box cover has a mounting cavity, and a second fixing member is provided around the side wall of the mounting cavity;

[0009] When the box body is embedded and installed into the mounting cavity, the first fixing member and the second fixing member cooperate to lock the box body and the box cover together.

[0010] Furthermore, the lid includes an inner plastic injection molded body and an outer thermoplastic elastic layer;

[0011] The inner plastic injection molded body forms the main outline of the box lid;

[0012] The outer thermoplastic elastic layer is laminated onto the inner plastic injection molded body.

[0013] Furthermore, the inner plastic injection molded body is made of PPE, PC, or PA material.

[0014] Furthermore, the outer thermoplastic elastic layer is made of TPU or TPE material.

[0015] Furthermore, the first fixing member is a protruding structure and the second fixing member is a groove structure; or, the first fixing member is a groove structure and the second fixing member is a protruding structure.

[0016] Furthermore, the inner end face of the mounting cavity is provided with reinforcing ribs.

[0017] Furthermore, the reinforcing ribs have a mesh structure.

[0018] Furthermore, the opening end of the mounting cavity is inclined to form a guide slope.

[0019] Furthermore, one side of the box has a cable holder for the cable to pass through the mounting cavity, the cable holder is provided with a box body latching block, and the box cover is provided with a box cover latching block that cooperates with the box body latching block.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] The photovoltaic junction box provided by this utility model has an outer cover that is installed with the box body, which effectively improves the lateral impact resistance of the photovoltaic junction box. At the same time, the all-round inner locking effectively improves the stability and sealing of the connection between the cover and the box body. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the photovoltaic junction box in this embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the overall structure of the photovoltaic junction box in this embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the cover structure of the photovoltaic junction box in an embodiment of this utility model;

[0025] Figure 4 This utility model Figure 3 Enlarged view of the structure at point C;

[0026] Figure 5 This is a top view of the overall structure of the photovoltaic junction box in this embodiment of the utility model;

[0027] Figure 6 This utility model Figure 5 Sectional view along line AA;

[0028] Figure 7 This utility model Figure 5 Sectional view along the BB direction;

[0029] Figure 8 This utility model Figure 7 Enlarged view of the structure at point D. Detailed Implementation

[0030] The photovoltaic junction box of this utility model will now be described in more detail with reference to the schematic diagrams, which illustrate preferred embodiments of this utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the utility model.

[0031] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0032] like Figure 1 and Figure 5 As shown in the figure, this utility model embodiment proposes a photovoltaic junction box, including a box body 2 and a box cover 1.

[0033] Specifically, refer to Figure 2 and Figure 3 The outer side wall of the box body 2 is provided with a first fixing member 22; the box cover 1 has an installation cavity (not shown in the figure), and the side wall of the installation cavity is provided with a second fixing member 11.

[0034] Combined with reference Figure 6 and Figure 7 When the box body 2 is embedded and installed into the mounting cavity, the first fixing member 22 and the second fixing member 11 cooperate to lock the box body and the box cover together.

[0035] In the above implementation process, the first fixing member 22 is a protruding structure, and the second fixing member 11 is a groove structure.

[0036] In this embodiment, when the photovoltaic junction box is in use, the electrical connector, conductive contact copper plate, bypass diode and other components are first installed into the box body 2. Then, the busbars leading out of the photovoltaic module and the internal components of the junction box are connected. Then, potting compound is applied to fill the box. After the potting compound has completely cured, the box cover 1 is closed. Specifically, the box cover 1 is placed directly above the box body 2 and then pressed vertically. The second fixing member 11 around the mounting cavity is slid into the first fixing member 22 around the box body 2, so as to achieve all-round internal locking between the box body 2 and the box cover 1.

[0037] In the above implementation process, in order to facilitate the docking of the second fixing member 11 and the first fixing member 22, the opening end of the mounting cavity is inclined to form a guide slope.

[0038] In another embodiment, the first fixing member 22 around the outer wall of the box body 2 is a groove structure, and the second fixing member 11 around the side wall of the mounting cavity is a protrusion structure, which can also achieve the box body 2 to be fitted and embedded in the mounting cavity.

[0039] The cover 1 completely covers the side walls of the box body 2. Compared with the end-cap type of the existing technology, this effectively improves the lateral impact resistance of the photovoltaic junction box, thus enhancing its impact resistance. At the same time, the all-around internal locking mechanism, compared with the single external snap-locking mechanism in the existing technology, effectively improves the connection stability and sealing between the cover 1 and the box body 2.

[0040] In summary, the photovoltaic junction box provided in this embodiment has improved impact resistance, stability of the connection between its cover 1 and body 2, and sealing performance compared to the prior art, and can better cope with extreme environments.

[0041] In the above embodiments, in conjunction with reference to Figure 4 The box cover 1 includes an inner plastic injection molded body 15; the inner plastic injection molded body 15 forms the main outline of the box cover 1.

[0042] Specifically, the inner plastic injection molded body 15 is made of PPE material, which has excellent insulation properties and high temperature stability, ensuring the safe and stable operation of electronic components inside the photovoltaic junction box.

[0043] Furthermore, the inner plastic injection body 15 may also include PC material and / or PA material.

[0044] PC material has excellent impact resistance. The cover 1 is made of PC material, which further improves the impact resistance of the photovoltaic junction box.

[0045] PA material has good corrosion resistance. The cover 1 is made of PA material to improve its corrosion resistance and meet the needs of photovoltaic junction boxes in complex environments.

[0046] In the above embodiment, the box cover 1 further includes an outer thermoplastic elastic layer 14, which is laminated onto the inner plastic injection molded body 15.

[0047] Specifically, the outer thermoplastic elastic layer 14 is made of TPU and / or TPE material.

[0048] Both TPU and TPE are common polymer materials with excellent elasticity and toughness. The outer thermoplastic elastic layer 14 is made of TPU and / or TPE, which enables the outer thermoplastic elastic layer 14 to give the lid 1 excellent resilience and toughness.

[0049] When the photovoltaic junction box is subjected to impact, the excellent resilience of the cover 1, provided by the outer thermoplastic elastic layer 14, can filter the impact force to a certain extent, thus improving the impact resistance of the photovoltaic junction box. At the same time, the excellent toughness provided by the outer thermoplastic elastic layer 14 allows the cover 1 to maintain good properties even in ultra-low temperature environments.

[0050] In a specific embodiment, such as Figure 3 As shown, a reinforcing rib 13 is provided on the inner end face of the mounting cavity. Preferably, the reinforcing rib 13 has a mesh structure. The provision of the reinforcing rib 13 improves the positive impact resistance of the photovoltaic junction box.

[0051] In yet another specific embodiment, in conjunction with reference to Figure 7-8 The housing 2 has a cable holder (not shown in the figure) on one side for the cable to pass through the mounting cavity. The cable holder is provided with a housing latching block 21, and the housing cover 1 is provided with a housing cover latching block 12 that cooperates with the housing latching block 21. The housing latching block 21 and the housing cover latching block 12 ensure the stability of the connection between the housing cover 1 and the cable holder and reduce the risk of warping and deformation of the housing cover 1.

[0052] In summary, compared with the prior art, this utility model has at least the following advantages:

[0053] The photovoltaic junction box provided by this utility model features an externally integrated cover that is installed with the box body, effectively improving the lateral impact resistance of the junction box. Simultaneously, the all-around internal locking mechanism further enhances the stability and sealing of the connection between the cover and the box body. Therefore, compared to existing technologies, the photovoltaic junction box provided by this utility model can better withstand extreme environments.

[0054] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A photovoltaic junction box, characterized in that, Includes the box body and the box lid; The outer side wall of the box is provided with a first fixing member around its perimeter; The box cover has a mounting cavity, and a second fixing member is provided around the side wall of the mounting cavity; When the box body is embedded and installed into the mounting cavity, the first fixing member and the second fixing member cooperate to lock the box body and the box cover together.

2. The photovoltaic junction box as described in claim 1, characterized in that, The box lid includes an inner plastic injection molded body and an outer thermoplastic elastic layer; The inner plastic injection molded body forms the main outline of the box lid; The outer thermoplastic elastic layer is laminated onto the inner plastic injection molded body.

3. The photovoltaic junction box as described in claim 2, characterized in that, The inner plastic injection body is made of PPE, PC or PA material.

4. The photovoltaic junction box as described in claim 2, characterized in that, The outer thermoplastic elastic layer is made of TPU or TPE material.

5. The photovoltaic junction box as described in claim 1, characterized in that, The first fixing member is a protruding structure, and the second fixing member is a groove structure; or, the first fixing member is a groove structure, and the second fixing member is a protruding structure.

6. The photovoltaic junction box as described in claim 1, characterized in that, The inner end face of the mounting cavity is provided with reinforcing ribs.

7. The photovoltaic junction box as described in claim 6, characterized in that, The reinforcing ribs have a mesh structure.

8. The photovoltaic junction box as described in claim 1, characterized in that, The opening end of the mounting cavity is inclined to form a guide slope.

9. The photovoltaic junction box as described in claim 1, characterized in that, The box body has a cable holder on one side for the cable to pass through the mounting cavity. The cable holder is provided with a box body latching block, and the box cover is provided with a box cover latching block that cooperates with the box body latching block.

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