An integrated junction box

Abstract

The utility model provides an integrated junction box, including a junction box body and a base; the base is provided with M spaces for accommodating the junction box body and the M junction box bodies are fixed therein one by one, wherein M is a natural number and M>1, and the outer ends of the leftmost and rightmost junction box bodies are also provided with extensions, and the external connectors are connected to the extensions and realize electrical connection with the corresponding inner part of the junction box body; the extensions can be a card slot structure that directly connects the cable and is connected to the external connector through the cable, or a connector plug-in structure that is directly plugged with the external connector. The three-part junction box is directly fixed and installed into a connected structure through the base. During assembly, the busbar is installed once, and there is no need to align the busbars for different split junction boxes multiple times and install them separately, which has high operation efficiency.

Description

Technical Field

[0001] The utility model relates to the photovoltaic field, in particular to an integrated junction box. Background Art

[0002] With the development of the global economy, new energy power generation technology has also developed rapidly. Solar energy has become one of the most promising renewable energy sources with its richest resources, wide distribution and cleanliness. Since the 21st century, the world's solar photovoltaic power generation industry has developed rapidly, the market application scale has continued to expand, and its role in the subsequent development of energy has become increasingly important. Photovoltaic modules composed of multiple solar cells are widely used as basic photovoltaic power generation units to build various photovoltaic power generation systems, or transparent film modules are used as building curtain wall materials to build energy-saving and environmentally friendly buildings. In addition, there are currently large-scale photovoltaic power generation systems deployed in coastal areas and even on the sea.

[0003] In the photovoltaic power generation system, a photovoltaic junction box is needed to lead out the electric energy generated by the photovoltaic module to connect with the external load. It is located between the array of solar cell modules and the solar charging control device, and plays the role of connecting and protecting the solar photovoltaic modules. Therefore, the photovoltaic module junction box is a key component of various power generation systems constructed by photovoltaic modules.

[0004] The three-part junction box, which is widely used at present, is a junction box structure designed for specific purposes. This junction box is mainly composed of three independent parts, namely the negative junction box, the middle junction box and the positive junction box. This design allows each junction box to be installed in the gap between adjacent double-glass photovoltaic modules, but it also has certain disadvantages. During the installation of the junction box, the staff needs to align the busbar for installation. For the three-part junction box, or even for some application scenarios where there are more than three junction boxes, it is necessary to align the busbar multiple times, which is time-consuming and inefficient. Utility Model Content

[0005] The utility model provides an integrated junction box to solve the problem that the current three-part junction box needs to align the busbars for many times when being installed in sequence, resulting in low operating efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An integrated junction box comprises a junction box body and a base; the base is provided with M spaces for accommodating the junction box bodies and the M junction box bodies are fixed therein in a one-to-one correspondence, wherein M is a natural number and M>1; the outer ends of the leftmost and rightmost junction box bodies are further provided with extensions, and external connectors are connected to the extensions to achieve electrical connection with the corresponding inside of the junction box bodies.

[0008] Preferably, the base is in the shape of an elongated column, and the M junction box bodies are sequentially arranged along the extension direction of the base in M ​​spaces for accommodating the junction box bodies.

[0009] Preferably, the junction box body and the base are integrally formed or detachably connected and fixed.

[0010] Preferably, the junction box body comprises a box body, an upper cover, a conductive module and a bypass protection element; the box body is arranged in the base, the upper cover is detachably buckled on the box body, and the conductive module and the bypass protection element are installed inside the box body.

[0011] Preferably, a busbar groove is provided at the bottom of the box body, and the busbar passes through the busbar groove and is connected to the conductive module.

[0012] Preferably, the conduit groove is a trumpet-shaped structure that is narrow at the top and wide at the bottom.

[0013] Preferably, the bypass protection element is a module diode, or an axial diode, or a surface-mount diode, or an integrated circuit module with a bypass protection function.

[0014] Preferably, the extension portion is a card slot, one end of the cable passes through the card slot and is electrically connected to the inside of the corresponding junction box body, and the other end of the cable is connected to an external connector.

[0015] Preferably, the extension portion is a connector plug-in portion integrally connected to the junction box body, a metal pin is provided inside the connector plug-in portion, the metal pin is electrically connected to the corresponding inside of the junction box body, and the external connector is directly plugged and connected to the connector plug-in portion.

[0016] Preferably, the base comprises a bottom wall, front and rear side walls, and an upper wall.

[0017] Preferably, a guide groove is provided at the top of the upper wall, and the guide groove is used to guide and converge the water flow on the top of the junction box body and flow it to the outside of the box; the guide groove also serves as a cable groove, and when the extension part or the external connector is provided with a cable, the cable is clamped in the cable groove.

[0018] Preferably, the bottom wall is a hollow frame, and a plurality of connecting ribs that cross each other vertically and horizontally are arranged in the bottom wall, and the connecting ribs connect the front and rear side walls and each junction box body.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: the three-part junction box is directly fixed and installed into a connected structure through the base. During assembly, the busbar is installed at one time, and there is no need to align the busbars for different split junction boxes multiple times and install them separately, which has high operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of an integrated junction box whose extended portion is a slot structure;

[0022] Figure 2 It is a schematic diagram of the overall structure of an integrated junction box in which the extension portion is a connector plug-in portion;

[0023] Figure 3 This is an exploded view of the junction box body;

[0024] Figure 4 It is a schematic diagram of the internal structure of the bottom surface of the integrated junction box;

[0025] Among them, the junction box body 1, the base 2, the extension part 3, the external connector 4, the cable 5; the box body 11, the upper cover 12, the conductive module 13, the bypass protection module 14, the busbar groove 15, the positioning column 16; the bottom wall 21, the front and rear side walls 22, the connecting ribs 23, the upper wall 24, the guide groove 25, the card slot 31, and the connector plug-in part 32. DETAILED DESCRIPTION

[0026] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] Please refer to Figure 1-Figure 4 , an integrated junction box, comprising a junction box body 1 and a base 2; the base 2 is provided with M spaces for accommodating the junction box body 1 and the M junction box bodies 1 are fixed therein in a one-to-one correspondence, wherein M is a natural number and M>1, and the outer ends of the leftmost and rightmost junction box bodies 1 are further provided with extension parts 3, and the external connector 4 is connected to the extension parts 3 and realizes electrical connection with the corresponding inside of the junction box body 1.

[0029] Currently, when building a photovoltaic power generation system, a three-part junction box is used so that each junction box body 11 can be installed in the gap between adjacent double-glass photovoltaic modules. However, three or even more junction box bodies 11 need to be aligned with the busbar in turn for installation. Repeated operations and repeated alignment of the busbar are time-consuming, labor-intensive, and inefficient.

[0030] The integrated junction box provided by the utility model is designed with a base 2 according to the existing photovoltaic power generation system installation standards and requirements, and all the junction box bodies 1 that need to be installed are fixed at the corresponding positions of the base 2. The M junction box bodies inside it are already connected. When in use, it is only necessary to directly connect the external connector 4 to the extension parts at both ends to achieve electrical connection with the M junction box bodies in the junction box. Therefore, during installation, the busbar can be installed directly on the base 2 at one time, and there is no need to align each junction box body 11 in turn and install them separately, which greatly improves the installation efficiency.

[0031] In actual production and use, the extension part of the junction box of the utility model also has different structures to adapt to different external connectors and facilitate connection with the external connector. Specifically, it includes at least the following two extension part structures:

[0032] First, if Figure 1 As shown, the extension portion 3 is a card slot 31, one end of the cable 5 passes through the card slot 31 and is electrically connected to the inside of the corresponding junction box body 1, and the other end of the cable 5 is connected to the external connector 4, that is, the external connector 4 is fixed by extending the cable 5 into the extension portion 3, and the cable 5 is connected to the conductive module 13 in the box body 11, which can be connected by resistance welding, riveting, laser welding or crimping, so as to be electrically connected to the inside of the corresponding junction box body 1.

[0033] Second, if Figure 2 As shown, the extension portion 3 is a connector plug-in portion 32 integrally connected to the junction box body 1. A metal pin is provided inside the connector plug-in portion 32. The metal pin is electrically connected to the corresponding inside of the junction box body 1. The external connector 4 is directly pluggable connected to the connector plug-in portion 32.

[0034] According to actual usage, the extension portion of the present invention can also be designed into other structures matching the external connector 4 to facilitate the connection between the external connector 4 and the junction box of the present invention.

[0035] In one embodiment, the base 2 is in the shape of a long column, and M junction box bodies 1 are sequentially arranged in the extension direction of the base 2 in M ​​spaces for accommodating the junction box bodies 1. In most cases, M=3, which is a widely used three-part junction box, including a negative junction box, an intermediate junction box, and a complete junction box. In some application scenarios, M≥3, and the length and thickness of the base 2 and the M spaces on the base 2 for accommodating the junction box bodies 1 are all produced and manufactured according to the requirements and standards in actual situations. When in use, there is no need to align the junction box bodies 1 one by one with the connection busbars and then install them separately, but only the integrated junction box needs to be connected to the busbar as a whole and installed directly.

[0036] In one embodiment, the junction box body 1 and the base 2 are integrally formed or detachably connected and fixed. The detachable connection method may be plug-in, snap-on, or the like.

[0037] In one embodiment, if Figure 3 As shown, the junction box body 1 includes a box body 11, an upper cover 12, a conductive module 13 and a bypass protection element 14; the box body 11 is arranged in the base 2, the upper cover 12 is detachably buckled on the box body 11, and the conductive module 13 and the bypass protection element 14 are installed inside the box body 11. Preferably, the bypass protection element 14 is a module diode, or an axial diode, or a surface-mount diode, or an integrated circuit module with a bypass protection function.

[0038] In a preferred embodiment, Figure 3 As shown, the bottom of the box body 11 is provided with a busbar groove 15, and the busbar passes through the busbar groove 15 and is connected to the conductive module 13, which is convenient for directly installing the busbar and fixing its position, thereby improving the installation efficiency. Furthermore, the busbar groove 15 is a trumpet-shaped structure that is narrow at the top and wide at the bottom, which facilitates the busbar to easily pass into the busbar groove 15 from the wider side and then be fixed by the narrower side, thereby achieving higher installation efficiency and better fixing effect.

[0039] A positioning column 16 is correspondingly disposed on the inner bottom of the box body 11 to fix and install the conductive module 13 .

[0040] In one embodiment, the base 2 includes a bottom wall 21, front and rear side walls 22, and an upper wall 24; further, a guide groove 25 is provided at the top of the upper wall 24, and the number of the guide grooves 25 is at least two and is used to guide and converge the water flow at the top of the box body 11 and flow to the outside of the box; the guide groove 25 also serves as a cable groove, and is used to clamp the cable in the cable groove when there is a cable on the extension part 3 or the external connector 4. The guide groove 25 can be set along the direction of the shorter side of the upper wall 24, and the two ends extend to the ends of the upper wall 24 respectively. In actual use, if water drops or water flows fall on the junction box, the accumulated water will converge into the guide groove 25 and slide along the guide groove 25 to the outside of the junction box, so as to prevent the accumulated water from penetrating into the inside of the junction box body 1 and damaging the electrical components. Furthermore, the size and shape of the guide groove 25 can be set to match the cable directly connected to the extension part 3, or the cable connected to the external connector 4, so that during transportation or installation, the excessively long cables can be fixed in the guide groove 25, which has the effect of being beautiful, neat, and reducing the occupied space.

[0041] In a more preferred embodiment, Figure 4 As shown, the bottom wall 21 is a hollow frame, and a plurality of cross-connecting ribs 23 are arranged inside the bottom wall 21. The connecting ribs 23 connect the front and rear side walls 22 and each junction box body 1. The slender structure of the base 2 makes it easy to be broken, and the connecting ribs 23 can play a good reinforcement effect.

[0042] More preferably, the top of the upper wall 24 is flush with the top of the junction box body 1 , which makes the overall appearance more beautiful and can effectively prevent the box cover of the junction box body 1 from falling off.

[0043] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. An integrated junction box, characterized in that: It includes a junction box body and a base; the base is provided with M spaces for accommodating the junction box body and the M junction box bodies are fixed therein one by one, wherein M is a natural number and M>1; the outer ends of the leftmost and rightmost junction box bodies are also provided with extensions, and the external connectors are connected to the extensions to realize electrical connection with the corresponding inside of the junction box body.

2. The integrated junction box according to claim 1, characterized in that: The base is in the shape of a long column, and the M junction box bodies are sequentially arranged along the extension direction of the base in the M spaces for accommodating the junction box bodies.

3. The integrated junction box according to claim 2, characterized in that: The junction box body and the base are integrally formed or detachably connected and fixed.

4. The integrated junction box according to claim 1, characterized in that: The junction box body comprises a box body, an upper cover, a conductive module and a bypass protection element; the box body is arranged in the base, the upper cover is detachably buckled on the box body, and the conductive module and the bypass protection element are installed inside the box body.

5. The integrated junction box according to claim 4, characterized in that: A busbar groove is provided at the bottom of the box body, and the busbar passes through the busbar groove and is connected to the conductive module.

6. The integrated junction box according to claim 1, characterized in that: The extension portion is a card slot, one end of the cable passes through the card slot and is electrically connected to the inside of the corresponding junction box body, and the other end of the cable is connected to an external connector.

7. The integrated junction box according to claim 1, characterized in that: The extension part is a connector plug-in part integrally connected to the junction box body, a metal pin is provided inside the connector plug-in part, the metal pin is electrically connected to the corresponding inside of the junction box body, and the external connector is directly plugged and connected to the connector plug-in part.

8. The integrated junction box according to claim 1, characterized in that: The base includes a bottom wall, front and rear side walls, and an upper wall.

9. The integrated junction box according to claim 8, characterized in that: A guide groove is provided at the top of the upper wall, and the guide groove is used to guide and converge the water flow on the top of the junction box body and flow it to the outside of the box; the guide groove also serves as a cable groove, and when the extension part or the external connector has a cable, it is used to fix the cable in the cable groove.

10. The integrated junction box according to claim 8, characterized in that: The bottom wall is a hollow frame, and a plurality of connecting ribs that cross each other vertically and horizontally are arranged in the bottom wall. The connecting ribs connect the front and rear side walls and each junction box body.

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