A modularly mounted photovoltaic module junction box

Abstract

The utility model belongs to the field of junction box, concretely relates to a kind of photovoltaic module junction box of modular installation, including junction slot box, the inside of junction slot box is provided with two cavities, and the inside of one of the cavities is embedded with circuit module, and the inside of another cavity is embedded with plug-in module, the top of junction slot box is contacted with cover plate, the front end of cover plate is fixedly connected with second buckle, the front end of junction slot box is fixedly connected with first buckle, and the inside of junction slot box is provided with through-hole.The utility model is connected in a detachable manner between circuit module and photovoltaic module, and circuit module and plug-in module are connected in a detachable manner, so that circuit module or plug-in module can be quickly replaced on site when damaged, damaged modules can be taken back to repair station for disassembly and repair, thereby reducing on-site workload and improving on-site operation efficiency.

Description

Technical Field

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

[0002] The photovoltaic module junction box is a crucial component in a solar photovoltaic system. It primarily connects the internal cell strings of the photovoltaic module to the external circuitry, serving to conduct current and protect the module. It collects and transmits the current generated by the photovoltaic module to equipment such as inverters. Furthermore, in the event of localized abnormalities within the module (such as hot spot effects), it uses internal bypass diodes to shunt current, preventing damage to the cell strings due to overheating and ensuring the safe and stable operation of the photovoltaic system.

[0003] In existing technologies, the connection methods between circuit modules and photovoltaic modules, and between circuit modules and plug-in modules, are inflexible. When a circuit module or plug-in module fails, it cannot be quickly replaced on-site; the entire module must be repaired, resulting in a large workload for on-site maintenance, low operation and maintenance efficiency, and high maintenance costs and time. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to provide a modular photovoltaic module junction box, which solves the problems of inflexible assembly and disassembly and inconvenient maintenance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a modular photovoltaic module junction box, including a junction box with two cavities inside. A circuit module is embedded in one cavity, and a plug-in module is embedded in the other cavity. A cover plate is in contact with the top of the junction box, and a second buckle is fixedly connected to the front end of the cover plate. A first buckle is fixedly connected to the front end of the junction box. A through hole is opened inside the junction box, and a protrusion is fixedly connected inside the junction box.

[0006] Preferably, the first and second latches engage. By designing the engagement between the first and second latches, the cover plate can be fixed to the wiring box.

[0007] Preferably, the circuit module includes a base plate, a flexible conductive sheet, a stationary contact, and a diode. The base plate is fixedly mounted inside the wiring box by bolts. The flexible conductive sheet is fixedly mounted on the base plate, and the stationary contact is fixedly mounted on the base plate, making contact with the flexible conductive sheet. The diode is fixedly mounted on the base plate. By designing the circuit module, the stability and reliability of current conduction can be ensured.

[0008] Preferably, the elastic conductive sheet is electrically connected to the stationary contact. By designing the electrical connection between the elastic conductive sheet and the stationary contact, current can be smoothly transmitted between them.

[0009] Preferably, there are multiple diodes, and the diodes are electrically connected to the stationary contact. By designing multiple diodes, the redundancy of the circuit is enhanced, so that even if some diodes fail, the other diodes can still maintain the basic function of the circuit.

[0010] Preferably, the plug-in module includes a plug-in body, a groove, and a moving contact. The plug-in body is slidably fitted inside the wiring box, and the plug-in body is slidably connected to a protrusion. The moving contact is fixedly installed on the plug-in body by bolts, and the moving contact contacts a stationary contact. By designing the plug-in module, the moving contact and the stationary contact can be connected and used.

[0011] Preferably, the plug body has a groove inside, and a protrusion is slidably connected inside the groove. By designing the groove, the protrusion can slide relative to the plug body.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In this invention, the circuit module and the photovoltaic module are detachably connected, and the circuit module and the plug-in module are detachably connected. This allows the circuit module or plug-in module to be quickly replaced on-site when it is damaged, and then the damaged module can be taken back to the repair station for disassembly and repair, thereby reducing on-site workload and improving on-site operation and maintenance efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This utility model Figure 1 A schematic diagram of the plug-in modules;

[0016] Figure 3 This utility model Figure 1 A schematic diagram of the circuit module;

[0017] Figure 4 This utility model Figure 1 A schematic diagram of a wiring box;

[0018] Figure 5 This is a schematic diagram of the cover plate structure of this utility model.

[0019] In the diagram: 1. Wiring box; 11. Cover plate; 111. Second snap-fit; 12. First snap-fit; 13. Through hole; 14. Protrusion; 2. Circuit module; 21. Base plate; 22. Elastic conductive sheet; 23. Stationary contact; 24. Diode; 3. Plug-in module; 31. Plug-in body; 311. Groove; 32. Moving contact. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 , Figure 4 , Figure 5 A modular photovoltaic module junction box includes a junction box 1. The junction box 1 has two cavities inside. A circuit module 2 is embedded in one cavity, and a plug-in module 3 is embedded in the other cavity. The top of the junction box 1 contacts a cover plate 11. A second buckle 111 is fixedly connected to the front end of the cover plate 11. A first buckle 12 is fixedly connected to the front end of the junction box 1. The first buckle 12 and the second buckle 111 are engaged. By designing the engagement between the first buckle 12 and the second buckle 111, the cover plate 11 can be fixed to the junction box 1. A through hole 13 is opened inside the junction box 1. A protrusion 14 is fixedly connected inside the junction box 1.

[0022] Please see Figure 1 , Figure 3 Circuit module 2 includes a base plate 21, an elastic conductive sheet 22, a stationary contact 23, and diodes 24. The base plate 21 is fixedly installed inside the wiring box 1 by bolts. The elastic conductive sheet 22 and the stationary contact 23 are fixedly installed on the base plate 21 and are in contact with the elastic conductive sheet 22. The elastic conductive sheet 22 and the stationary contact 23 are electrically connected. By designing the electrical connection between the elastic conductive sheet 22 and the stationary contact 23, the current can be smoothly transmitted between them. Multiple diodes 24 are fixedly installed on the base plate 21 and are electrically connected to the stationary contact 23. By designing multiple diodes 24, the redundancy of the circuit is enhanced. Even if some diodes 24 fail, the other diodes 24 can still maintain the basic function of the circuit. By designing circuit module 2, the stability and reliability of current conduction can be ensured.

[0023] Please see Figure 1 , Figure 2The plug-in module 3 includes a plug-in body 31, a groove 311, and a moving contact 32. The plug-in body 31 is slidably fitted inside the wiring box 1. The plug-in body 31 is slidably connected to the protrusion 14. The groove 311 is provided inside the plug-in body 311. The protrusion 14 is slidably connected inside the groove 311. By designing the groove 311, the protrusion 14 can slide relative to the plug-in body 31. The moving contact 32 is fixedly installed on the plug-in body 31 by bolts. The moving contact 32 contacts the stationary contact 23. By designing the plug-in module 3, the moving contact 32 and the stationary contact 23 can be connected for use.

[0024] The specific implementation process of this utility model is as follows: During use, in the module installation stage, the two cavities inside the wiring box 1 are used to install the circuit module 2 and the plug-in module 3, respectively. The base plate 21 of the circuit module 2 is fixed inside the wiring box 1 with bolts, providing a stable installation base for the elastic conductive sheet 22, the stationary contact 23, and the diode 24. The plug-in body 31 of the plug-in module 3 is slidably connected to the protrusion 14 inside the wiring box 1. Through this sliding fit, the plug-in body 31 can be accurately positioned and installed inside the wiring box 1. The sliding connection between the groove 311 and the protrusion 14 further ensures the stability and accuracy of the installation of the plug-in module 3. After the circuit module 2 and the plug-in module 3 are installed in place, the cover plate 11 is placed on top of the wiring box 1. The first buckle 12 and the second buckle 111 are engaged to seal the entire wiring box, effectively protecting the internal circuit module 2 and plug-in module 3 and preventing external factors such as dust and moisture from intruding and affecting their normal operation.

[0025] During circuit connection, the elastic conductive sheet 22 of circuit module 2 remains in contact with the stationary contact 23, achieving electrical connection and forming the basic connection part of the circuit. Multiple diodes 24 are fixedly mounted on the base plate 21 and electrically connected to the stationary contact 23. The diodes 24 play a crucial role in preventing current backflow and protecting the photovoltaic modules. The moving contact 32 of plug-in module 3 contacts the stationary contact 23 of circuit module 2, thus connecting plug-in module 3 to the entire circuit system. The current generated by the photovoltaic modules is transmitted through the moving contact 32 of plug-in module 3 to the stationary contact 23 of circuit module 2, and then through the circuit composed of the elastic conductive sheet 22 and diodes 24, achieving stable current transmission and effective control. Finally, the processed current is delivered to subsequent electrical equipment or energy storage devices.

[0026] When circuit module 2 or plug-in module 3 is damaged, the modular design advantage of this junction box becomes apparent. Since circuit module 2 and the photovoltaic module, as well as circuit module 2 and plug-in module 3, are detachably connected, on-site maintenance personnel do not need to perform complex disassembly and repair of the entire junction box. They only need to remove the damaged module from the junction box 1. For example, if plug-in module 3 is damaged, the plug-in body 31 can be directly slid out of the junction box 1 along the protrusion 14 and replaced with a new plug-in module 3; if circuit module 2 is damaged, it can be disassembled and replaced by unscrewing the bolts fixing the base plate 21. Taking the damaged module back to the repair station for professional disassembly and repair greatly reduces on-site workload, avoids tedious troubleshooting and delicate repair operations on-site, significantly improves on-site maintenance efficiency, reduces maintenance costs and time costs, and ensures that the photovoltaic system can quickly return to normal operation.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modularly installed photovoltaic module junction box, comprising a junction box (1), characterized in that: The wiring box (1) has two cavities inside. A circuit module (2) is embedded in one cavity, and a plug-in module (3) is embedded in the other cavity. The top of the wiring box (1) is in contact with a cover plate (11). A second buckle (111) is fixedly connected to the front end of the cover plate (11). A first buckle (12) is fixedly connected to the front end of the wiring box (1). A through hole (13) is opened inside the wiring box (1). A protrusion (14) is fixedly connected inside the wiring box (1).

2. The modular photovoltaic module junction box according to claim 1, characterized in that: The first buckle (12) engages with the second buckle (111).

3. The modular photovoltaic module junction box according to claim 1, characterized in that: The circuit module (2) includes a base plate (21), an elastic conductive sheet (22), a stationary contact (23), and a diode (24). The base plate (21) is fixedly installed inside the wiring box (1) by bolts. The elastic conductive sheet (22) is fixedly installed on the base plate (21). The stationary contact (23) is fixedly installed on the base plate (21) and contacts the elastic conductive sheet (22). The diode (24) is fixedly installed on the base plate (21).

4. A modular photovoltaic module junction box according to claim 3, characterized in that: The elastic conductive sheet (22) is electrically connected to the stationary contact (23).

5. A modular photovoltaic module junction box according to claim 3, characterized in that: There are multiple diodes (24), and the diodes (24) are electrically connected to the stationary contact (23).

6. A modular photovoltaic module junction box according to claim 1, characterized in that: The plug-in module (3) includes a plug-in body (31), a groove (311), and a moving contact (32). The plug-in body (31) is slidably sleeved inside the wiring box (1). The plug-in body (31) is slidably connected to the protrusion (14). The moving contact (32) is fixedly installed on the plug-in body (31) by bolts. The moving contact (32) is in contact with a stationary contact (23).

7. A modular photovoltaic module junction box according to claim 6, characterized in that: The plug body (31) has a groove (311) inside, and a protrusion (14) is slidably connected inside the groove (311).

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