Photovoltaic junction box

Abstract

The utility model relates to a photovoltaic junction box, which belongs to the technical field of photovoltaic equipment and comprises a lower shell, an upper cover body used for covering an opening of the lower shell and a conductive assembly installed on the lower shell and matched with a bus bar. The outer side wall of the lower shell is provided with a mounting plate which extends in the direction away from the lower shell and is used for mounting a solar panel, reinforcing rib plates are arranged on the two sides of the bottom face of the mounting plate, and a glue containing groove is formed between every two adjacent reinforcing rib plates. And the lower shell is provided with a connecting through groove at one side of the mounting plate, wherein the connecting through groove penetrates through the inner and outer cavities of the lower shell and is used for a bus bar to pass through. The application has the effect of providing the photovoltaic junction box which can adapt to the installation of solar panels with various thicknesses.

Description

Technical Field

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

[0002] A photovoltaic (PV) junction box is a connecting device between a solar cell array (composed of solar cell modules) and a solar charging control device. Its main function is to connect and protect the solar photovoltaic modules, connect the electricity generated by the solar cells to external power lines, and conduct the current generated by the photovoltaic modules. During use, the junction box needs to be connected to the solar panels and busbars. The solar panels convert solar energy into electrical energy, and the busbars connect the solar panels and the junction box, transmitting the collected electrical energy to the junction box.

[0003] Chinese utility model patent CN219643517U discloses a junction box that is easy to install, including a bottom box, a cover assembly, and a conductive assembly. The cover assembly includes a first cover, a second cover, and a third cover. The third cover is joined to the second cover, and the busbar is pressed between the third cover and the bottom box.

[0004] Regarding the aforementioned technologies, the solar panel is fixed in the junction box by the pressing action between the upper and lower shells. The inventor believes that the junction box has high requirements for the solar panel installed in it, and the junction box is not very flexible in its use, and can only be used for solar panels of relatively uniform thickness. Utility Model Content

[0005] In order to provide a photovoltaic junction box that can accommodate solar panels of various thicknesses, this application provides a photovoltaic junction box.

[0006] The photovoltaic junction box provided in this application adopts the following technical solution:

[0007] A photovoltaic junction box includes a lower housing, an upper cover for closing the opening of the lower housing, and a conductive component installed on the lower housing and cooperating with a busbar. The outer side wall of the lower housing is provided with a mounting plate extending away from the lower housing for mounting a solar panel. Reinforcing ribs are provided on both sides of the bottom surface of the mounting plate, and an adhesive groove is formed between adjacent reinforcing ribs. The lower housing has a connecting slot on one side of the mounting plate that penetrates the inner and outer cavities of the lower housing and allows the busbar to pass through.

[0008] By adopting the above technical solution, during the use of the photovoltaic junction box, the solar panel is placed on the bottom surface of the mounting plate, and glue is filled into the glue groove on the bottom surface of the mounting plate to fix the solar panel to the photovoltaic junction box. Simultaneously, the busbar extends into the inner cavity of the lower housing through the connecting groove and cooperates with the conductive components to collect and transport the electrical energy converted from solar energy. Compared to the existing installation method of pressing the solar panel together with the upper and lower housings, this method of connecting the solar panel to the photovoltaic junction box by filling the glue groove has fewer restrictions on the shape of the solar panel, allowing the photovoltaic junction box to accommodate solar panels of greater thickness, and the installation process is quick and convenient.

[0009] Optionally, the lower housing has a first arrangement area and a second arrangement area for arranging conductive components; the conductive components include two conductive sheets arranged in the first arrangement area, a diode arranged between the two conductive sheets, and a conductive cable arranged in the second arrangement area and extending to the outer cavity of the lower housing.

[0010] By adopting the above technical solution, the specific structure of the conductive component is disclosed. Arranging two conductive sheets in the first arrangement area and placing a diode between the two conductive sheets helps to protect the circuit. The conductive cable is arranged in the second arrangement area and extends to the outer cavity of the lower housing, which facilitates external connection while ensuring that the internal structure is compact and orderly, thus improving space utilization.

[0011] Optionally, the conductive sheet has a limiting hole, and the lower housing is provided with a first abutting block and a second abutting block in the first arrangement area for the conductive sheet to abut against. The top surface of the first abutting block is provided with a limiting protrusion that protrudes away from the first abutting block and cooperates with the limiting hole.

[0012] By adopting the above technical solution, the setting of the first abutting block and the second abutting block in the first arrangement area of ​​the lower housing helps to provide stable support for the arrangement of the conductive sheet. Furthermore, the cooperation between the upper limit protrusion of the first abutting block and the upper limit hole of the conductive sheet not only improves the assembly efficiency of the conductive sheet, but also helps to limit the conductive sheet arranged in the lower housing, reduce the probability of the conductive sheet shifting during use, and ensure the stability of the conductive sheet during use.

[0013] Optionally, the conductive sheet has a connecting portion extending toward the diode, and the conductive sheet has limiting flanges on both sides of the connecting portion.

[0014] By adopting the above technical solution, the connection portion on the conductive sheet facilitates connection with the diode, ensuring stable current transmission. The limiting flange helps reduce the probability of diode misalignment or displacement during installation, effectively improving assembly efficiency.

[0015] Optionally, the diode includes a diode body and pins connected to both sides of the diode body, wherein the end of the pin away from the diode body is bent toward the diode body, and the pin is flat.

[0016] By adopting the above technical solution, the end of the diode pin furthest from the diode body is bent towards the diode body. Compared with the existing diode mounting method in the junction box, this effectively reduces the space occupied by the diode, making the overall structure inside the photovoltaic junction box more compact. The flat pin design allows the pin to fit more closely with the connection part of the conductive plate, further ensuring the stability of current transmission.

[0017] Optionally, the conductive cable is elliptical in shape, and the lower housing has an installation slot adapted to the conductive cable and for the conductive cable to pass through; the lower housing has a sealing block at the installation slot that cooperates with the installation slot, and the sealing block has an abutment groove that abuts against the outer wall of the conductive cable.

[0018] By adopting the above technical solution, the elliptical cross-section of the conductive cable can better adapt to the installation environment and reduce the height of the photovoltaic junction box. The installation of through-slots and sealing blocks effectively improves the waterproof performance of the photovoltaic junction box.

[0019] Optionally, the lower housing is symmetrically provided with a first limiting block at the mounting slot along the axial direction of the conductive cable, and the sealing pressure block is symmetrically provided with a second limiting block at the abutment slot along the axial direction of the conductive cable.

[0020] By adopting the above technical solution, the setting of the first limiting block at the installation through groove and the second limiting block at the abutment groove of the sealing pressure block on the lower shell helps to limit the conductive cable, realizes the precise positioning and stable clamping of the conductive cable, and reduces the probability of the conductive cable deviating or shaking in the axial direction during use.

[0021] Optionally, the sealing block has a sealing part and a limiting protrusion. The lower housing has a limiting opening at the mounting slot for accommodating the limiting protrusion and for limiting the sealing part. The bottom of the sealing part has a guide groove. The lower housing has an abutting platform at the mounting slot for the bottom surface of the sealing block to abut against. The top surface of the abutting platform has a guide block that mates with the guide groove. The top of the guide block also has a locking block that extends away from the guide block and abuts against the side wall of the sealing block.

[0022] By adopting the above technical solution, the sealing block is limited by the fit between the limiting protrusion of the sealing block and the upper limit opening of the lower housing, reducing the probability of the sealing block coming out of the lower housing during use. Furthermore, the abutment plane and the fit between the guide block on the abutment plane and the guide groove on the sealing block provide guidance for the assembly process of the sealing block in the lower housing, effectively improving assembly efficiency, reducing the probability of the sealing block shifting during use, and ensuring the sealing effect of the lower housing at the mounting through hole.

[0023] Optionally, the lower housing and the upper cover are connected by a snap-fit ​​structure, the snap-fit ​​structure including a snap-fit ​​block installed on the inner side wall of the lower housing and a snap-fit ​​groove opened in the upper cover, the top surface of the snap-fit ​​block being inclined downward in the direction away from the lower housing.

[0024] By adopting the above technical solution, the lower shell and the upper cover are connected by a snap-fit ​​structure, which facilitates the rapid installation and separation of the lower shell and the upper cover, and the connection stability between the upper cover and the lower shell is ideal. The downward tilt of the top surface of the snap-fit ​​block away from the lower shell helps to guide the installation process between the upper cover and the lower shell, improving the assembly efficiency between the upper cover and the lower shell.

[0025] Optionally, the inner wall of the lower housing is provided with a plurality of reinforcing ribs spaced apart along the length of the lower housing, and the number of the reinforcing ribs is not less than 6.

[0026] By adopting the above technical solution, multiple reinforcing ribs are provided at intervals along the length of the lower housing on the inner sidewall, which helps to improve the structural strength of the photovoltaic junction box and reduce the probability of deformation of the photovoltaic junction box under external pressure.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. A photovoltaic junction box, wherein an mounting plate is provided on the outer side wall of the lower housing, and a reinforcing rib and an adhesive groove are provided on the bottom surface of the mounting plate, so that the solar panel only needs to abut against the bottom surface of the reinforcing rib and fill the adhesive groove during installation, and the solar panel and the photovoltaic junction box are bonded by the adhesive, so that the shape of the solar panel installed in the photovoltaic junction box can be less restricted, and the photovoltaic junction box can adapt to the installation of solar panels of various thicknesses;

[0029] 2. By bending the diode pins away from the diode body towards the diode body, the space occupied by the diode is effectively reduced, making the internal structure of the lower casing more compact;

[0030] 3. The sealing effect of the photovoltaic junction box at the installation slot is effectively improved by the cooperation between the sealing block and the installation slot. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the photovoltaic junction box in the embodiments of this application.

[0032] Figure 2 This is an exploded view of the photovoltaic junction box in an embodiment of this application.

[0033] Figure 3 This is a schematic diagram of the mounting plate in an embodiment of this application.

[0034] Figure 4 This is a schematic diagram of the structure of the lower housing and the conductive component in an embodiment of this application.

[0035] Figure 5 This is a schematic diagram of the structure of the conductive sheet and the diode in an embodiment of this application.

[0036] Figure 6 This is a schematic diagram of the structure of the conductive cable, the lower housing, and the sealing block in the embodiment of this application.

[0037] Figure 7 This is a schematic diagram of the sealing block in an embodiment of this application.

[0038] Figure 8 yes Figure 1 A magnified view of a portion of point A in the middle.

[0039] Explanation of reference numerals in the attached drawings: 1. Lower housing; 11. Mounting plate; 111. Reinforcing rib; 112. Adhesive groove; 12. Connecting through groove; 13. First arrangement area; 131. First abutting block; 1311. Limiting protrusion; 132. Second abutting block; 14. Second arrangement area; 141. Mounting through groove; 1411. First limiting block; 15. Limiting opening; 16. Abutting platform; 161. Guide block; 162. Locking block; 17. Reinforcing rib 18. Snap-fit ​​block; 2. Top cover; 21. Snap-fit ​​groove; 3. Conductive component; 31. Conductive sheet; 311. Limiting hole; 312. Connecting part; 313. Limiting flange; 32. Diode; 321. Diode body; 322. Pin; 33. Conductive cable; 4. Sealing block; 41. Abutment groove; 411. Second limiting block; 42. Sealing part; 421. Guide groove; 43. Limiting protrusion; 5. Solar panel; 6. Busbar. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0041] This application discloses a photovoltaic junction box. (Refer to...) Figure 1 and Figure 2 A photovoltaic junction box includes a lower housing 1, an upper cover 2 for closing the opening of the lower housing 1, and a conductive component 3 installed on the lower housing 1 and cooperating with a busbar 6. The lower housing 1 has a hollow cuboid structure and an opening at the top.

[0042] Reference Figure 2 and Figure 3 The top of the outer wall of the lower housing 1 is provided with an mounting plate 11 extending away from the lower housing 1 for mounting the solar panel 5. Reinforcing ribs 111 are provided on both sides of the bottom surface of the mounting plate 11, and a glue groove 112 is formed between adjacent reinforcing ribs 111 on the bottom surface of the mounting plate 11. A connecting groove 12 penetrating the inner and outer cavities of the lower housing 1 and allowing the busbar 6 to pass through is also provided on the side of the lower housing 1 where the mounting plate 11 is provided. During the installation of the solar panel 5, the top surface of the solar panel 5 is placed against the bottom surface of the reinforcing rib 111, and then glue is filled into the glue groove 112 to bond the solar panel 5 and the lower housing 1 together. In this embodiment, two mounting plates 11 are provided on the outer wall of the lower housing 1, and the connecting groove 12 is formed between the two mounting plates 11. An additional reinforcing rib 111 is provided on the bottom surface of the mounting plate 11 between the two reinforcing ribs 111, further improving the stability of the connection between the solar panel 5 and the lower housing 1.

[0043] Reference Figure 4 The lower housing 1 has a first arrangement area 13 and a second arrangement area 14 for arranging conductive components 3, which are arranged along the length of the lower housing 1. The conductive component 3 includes two conductive sheets 31 arranged in the first arrangement area 13, a diode 32 arranged between the two conductive sheets 31, and a conductive cable 33 arranged in the second arrangement area 14 and extending to the outer cavity of the lower housing 1. The conductive cable 33 is electrically connected to the conductive sheets 31. The conductive sheets 31 have two limiting holes 311 penetrating their upper and lower sides. The lower housing 1 has a first abutting block 131 and a second abutting block 132 at the bottom of the first arrangement area 13 for the bottom surface of the conductive sheets 31 to abut against. The top surface of the first abutting block 131 has a limiting protrusion 1311 extending away from the first abutting block 131 and engaging with the limiting hole 311 of the conductive sheet 31. The top of the limiting protrusion 1311 has a chamfered structure, thereby improving the assembly efficiency of the conductive sheets 31.

[0044] Reference Figure 4 and Figure 5The conductive sheet 31 has a connecting portion 312 extending towards the diode 32 and disposed at the bottom of the diode 32, and the connecting portion 312 of the conductive sheet 31 has limiting flanges 313 on both sides for restricting the diode 32. The diode 32 includes a diode body 321 and pins 322 connected to both sides of the diode body 321. The end of the pin 322 away from the diode body 321 is bent towards the diode body 321 and welded to the top surface of the connecting edge of the conductive sheet 31. The pin 322 is flat so that the pin 322 fits more closely to the connecting portion 312.

[0045] Reference Figure 6 and Figure 7 The conductive cable 33 has an elliptical cross-section. The lower housing 1 has a mounting groove 141 in the second arrangement area 14 for arranging the conductive cable 33. A sealing block 4 is provided at the mounting groove 141 to cooperate with the mounting groove 141 and press the conductive cable 33 firmly. The sealing block 4 has an abutment groove 41 that abuts against the conductive cable 33. To limit the movement of the conductive cable 33, two first limiting blocks 1411 are symmetrically arranged on the lower housing 1 along the axis of the conductive cable 33 at the mounting groove 141, and a second limiting block 411 is symmetrically arranged on the sealing block 4 along the axis of the conductive cable 33 at the abutment groove 41. In this embodiment, the first limiting blocks 1411 are symmetrically arranged at the bends of the mounting groove 141, and the second limiting blocks 411 are arranged at the bends of the abutment groove 41.

[0046] Reference Figure 6 and Figure 7 The sealing block 4 has a sealing portion 42 and a limiting protrusion 43 connected to one side of the sealing portion 42, and the width of the sealing portion 42 is greater than the width of the limiting protrusion 43. In order to reduce the probability of the sealing block 4 falling out of the lower housing 1, the lower housing 1 has a limiting opening 15 at the mounting slot 141 for the limiting protrusion 43 of the sealing block 4 to be arranged and for restricting the sealing portion 42 of the sealing block 4 from falling out of the lower housing 1. The sealing block 4 has guide grooves 421 on both sides of the bottom surface of the sealing portion 42, and the lower housing 1 also has an abutment platform 16 at the mounting slot 141 for the bottom surface of the sealing block 4 to abut, and the top surface of the abutment platform 16 has a guide block 161 for cooperating with the guide groove 421. The top surface of the guide block 161 also has a locking block 162 extending away from the guide block 161 and abutting with the side wall of the sealing portion 42 of the sealing block 4.

[0047] Reference Figure 4 and Figure 6To improve the structural strength of the lower housing 1, multiple reinforcing ribs 17 are spaced apart along the length of the lower housing 1 on its inner sidewall, and the number of reinforcing ribs 17 in the lower housing 1 is not less than 6. Among them, two reinforcing ribs 17 are arranged on the side of the abutment platform 16 away from the mounting slot 141, which can further limit the sealing block 4 arranged on the abutment platform 16. In this embodiment, 9 reinforcing ribs 17 are provided on the inner sidewall of the lower housing 1.

[0048] Reference Figure 1 and Figure 8 To improve the installation efficiency between the lower housing 1 and the upper cover 2, the lower housing 1 and the upper cover 2 are connected by a snap-fit ​​structure. The snap-fit ​​structure includes a snap-fit ​​block 18 installed on the inner side wall of the lower housing 1 and a snap-fit ​​groove 21 opened on the upper cover 2 and arranged corresponding to the snap-fit ​​block 18. The top surface of the snap-fit ​​block 18 is inclined downward in the direction away from the lower housing 1.

[0049] The implementation principle of a photovoltaic junction box according to an embodiment of this application is as follows: During the use of the photovoltaic junction box, the solar panel 5 is first arranged on the bottom surface of the mounting plate 11, and the solar panel 5 is fixed on the photovoltaic junction box by filling the glue groove 112 on the bottom surface of the mounting plate 11 with glue. At the same time, the connecting groove 12 opened on the lower housing 1 allows the busbar 6 to extend into the lower housing 1 and cooperate with the conductive component 3 to realize the conversion of solar energy into electrical energy and the transmission of electrical energy. Compared with the existing installation method of pressing the solar panel 5 together with the upper and lower housings 1, the method of connecting the solar panel 5 to the photovoltaic junction box by filling the glue groove 112 with glue has fewer restrictions on the shape of the solar panel 5, so that the photovoltaic junction box can be adapted to solar panels 5 of various thicknesses, and the installation process is quick and convenient.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A photovoltaic junction box, characterized in that, The device includes a lower housing (1), an upper cover (2) for covering the opening of the lower housing (1), and a conductive component (3) installed on the lower housing (1) and cooperating with the busbar (6). The outer side wall of the lower housing (1) is provided with an mounting plate (11) extending away from the lower housing (1) and for mounting the solar panel (5). The bottom surface of the mounting plate (11) is provided with reinforcing ribs (111) on both sides, and a glue groove (112) is formed between adjacent reinforcing ribs (111). The lower housing (1) has a connecting groove (12) on one side of the mounting plate (11) that penetrates the inner and outer cavities of the lower housing (1) and is used for the busbar (6) to pass through.

2. A photovoltaic junction box according to claim 1, characterized in that, The lower housing (1) has a first arrangement area (13) and a second arrangement area (14) for arranging the conductive component (3); the conductive component (3) includes two conductive sheets (31) arranged in the first arrangement area (13), a diode (32) arranged between the two conductive sheets (31), and a conductive cable (33) arranged in the second arrangement area (14) and extending to the outer cavity of the lower housing (1).

3. A photovoltaic junction box according to claim 2, characterized in that, The conductive sheet (31) has a limiting hole (311). The lower housing (1) is provided with a first abutting block (131) and a second abutting block (132) in the first arrangement area (13) for the conductive sheet (31) to abut. The top surface of the first abutting block (131) is provided with a limiting protrusion (1311) that protrudes away from the first abutting block (131) and cooperates with the limiting hole (311).

4. A photovoltaic junction box according to claim 3, characterized in that, The conductive sheet (31) has a connecting portion (312) extending toward the diode (32), and the conductive sheet (31) has limiting flanges (313) on both sides of the connecting portion (312).

5. A photovoltaic junction box according to claim 2, characterized in that, The diode (32) includes a diode body (321) and pins (322) connected to both sides of the diode body (32). The end of the pin (322) away from the diode body (321) is bent toward the diode body (321), and the pin (322) is flat.

6. A photovoltaic junction box according to claim 2, characterized in that, The conductive cable (33) is elliptical in shape. The lower housing (1) has an installation slot (141) that is adapted to the conductive cable (33) and is used for the conductive cable (33) to pass through. The lower housing (1) has a sealing block (4) that cooperates with the installation slot (141) at the installation slot (141). The sealing block (4) has an abutment groove (41) that abuts against the outer wall of the conductive cable (33).

7. A photovoltaic junction box according to claim 6, characterized in that, The lower housing (1) is symmetrically provided with a first limiting block (1411) at the mounting through groove (141) along the axial direction of the conductive cable (33), and the sealing pressure block (4) is symmetrically provided with a second limiting block (411) at the abutment groove (41) along the axial direction of the conductive cable (33).

8. A photovoltaic junction box according to claim 6, characterized in that, The sealing block (4) has a sealing part (42) and a limiting protrusion (43). The lower housing (1) has a limiting opening (15) at the mounting through groove (141) for the limiting protrusion (43) to be arranged and for limiting the sealing part (42). The bottom of the sealing part (42) has a guide groove (421). The lower housing (1) has an abutting platform (16) at the mounting through groove (141) for the bottom surface of the sealing block (4) to abut. The top surface of the abutting platform (16) has a guide block (161) that cooperates with the guide groove (421). The top of the guide block (161) also has a locking block (162) that extends away from the guide block (161) and abuts against the side wall of the sealing block (4).

9. A photovoltaic junction box according to claim 1, characterized in that, The lower housing (1) and the upper cover (2) are connected by a snap-fit ​​structure. The snap-fit ​​structure includes a snap-fit ​​block (18) installed on the inner side wall of the lower housing (1) and a snap-fit ​​groove (21) opened on the upper cover (2). The top surface of the snap-fit ​​block (18) is inclined downward in the direction away from the lower housing (1).

10. A photovoltaic junction box according to claim 1, characterized in that, The inner wall of the lower housing (1) is provided with a plurality of reinforcing ribs (17) spaced apart along the length of the lower housing (1), and the number of the reinforcing ribs (17) is not less than 6.

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