CN222750397U

CN222750397U - Integrated junction box

Info

Publication number: CN222750397U
Application number: CN202421436463.8U
Authority: CN
Inventors: 段正刚; 杨伟平; 熊双
Original assignee: Suzhou QC Solar Co Ltd
Current assignee: Suzhou QC Solar Co Ltd
Priority date: 2024-06-23
Filing date: 2024-06-23
Publication date: 2025-04-11
Anticipated expiration: 2034-06-23

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

Integrated junction box

Technical Field

The utility model relates to the field of photovoltaics, in particular to an integrated junction box.

Background

With the development of global economy, new energy power generation technology is rapidly developed, and solar energy is widely and cleanly used as one of renewable energy sources with the most development potential according to the most abundant distribution of the resource quantity. Since the 21 st century, the world solar photovoltaic power generation industry has developed rapidly, the market application scale has been expanding, and the role in the development of subsequent energy sources has become more and more important. The photovoltaic module formed by combining a plurality of solar cells is used as a basic photovoltaic power generation unit in a large amount for constructing various photovoltaic power generation systems, or the transparent film module is used as a building curtain wall material to construct an energy-saving environment-friendly building. In addition, there are currently large-scale photovoltaic power generation systems deployed in coastal areas and even at sea.

In the photovoltaic power generation system, electric energy generated by the photovoltaic module is led out by using a photovoltaic junction box to be connected with an external load, and the photovoltaic junction box is positioned between a square matrix formed by the solar cell module and the solar charging control device, so that the photovoltaic junction box has the functions of connecting and protecting the solar photovoltaic module. Therefore, the photovoltaic module junction box is a key component of the photovoltaic module to construct various power generation systems.

The three-part junction box with wider application at present is a junction box structure designed for specific use, and the junction box mainly comprises three independent parts, namely a negative electrode junction box, a middle junction box and a positive electrode junction box. By means of the design, each junction box can be installed in the gap of the adjacent double-glass photovoltaic module respectively, but the junction boxes have certain defects, workers are required to align the junction belt for installation in the installation process of the junction boxes, the three-split junction boxes are even more than three junction boxes in certain application scenes, the junction belt is required to be aligned for many times, the operation is time-consuming, and the efficiency is low.

Disclosure of utility model

The utility model provides an integrated junction box, which aims to solve the problems that the current three-split junction box needs to be aligned with a bus bar for multiple times when being installed in sequence and has low operation efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The integrated junction box comprises a junction box body and a base, wherein M spaces for accommodating the junction box bodies are formed in the base, M junction box bodies are fixed in the junction box bodies in a one-to-one correspondence manner, M is a natural number and M is greater than 1, extension parts are further arranged at the outer end parts of the junction box bodies at the leftmost end and the rightmost end, and an external connector is connected to the extension parts and is electrically connected with the interiors of the corresponding junction box bodies.

Preferably, the base is in a strip column shape, and M junction box bodies are sequentially arranged in M spaces for accommodating the junction box bodies along the extending direction of the base.

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

Preferably, the junction box body comprises a box body, an upper cover, a conductive module and a bypass protection element, wherein 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.

Preferably, a bus bar slot is formed in the bottom of the box body, and the bus bar is connected to the conductive module through the bus bar slot.

Preferably, the strap slot is a horn structure with a narrow upper part and a wide lower part.

Preferably, the bypass protection element is a module diode, or an axial diode, or a patch diode, or an integrated circuit module with bypass protection function.

Preferably, the extending portion is a clamping groove, one end of the cable passes through the clamping groove to be electrically connected with the inside of the corresponding junction box body, and the other end of the cable is connected with the external connector.

Preferably, the extension part is a connector plugging part integrally connected with the junction box body, a metal contact pin is arranged in the connector plugging part, the metal contact pin is electrically connected with the corresponding inside of the junction box body, and the external connector is directly connected with the connector plugging part in a plugging manner.

Preferably, the base includes a bottom wall, front and rear side walls, and an upper wall.

Preferably, the top of the upper wall is provided with a diversion trench, the diversion trench is used for guiding and converging water flow at the top of the junction box body and flowing out of the junction box, and the diversion trench is also used as a cable slot for clamping the cable in the cable slot when the cable is arranged on the extending part or the external connector.

Preferably, the bottom wall is a hollow frame body, a plurality of connecting ribs which are vertically and horizontally crossed are arranged in the bottom wall, and the connecting ribs are connected with the front side wall, the rear side wall and the junction box bodies.

Compared with the prior art, the three-split junction box has the beneficial effects that the three-split junction box is directly and fixedly installed into the connected structure through the base, and when the three-split junction box is assembled, the bus strap is installed once without aiming at different split junction boxes to be installed respectively in multiple times, so that the operation efficiency is high.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of an integrated junction box with an extension part of a clamping groove structure;

FIG. 2 is a schematic view of the overall structure of an integrated junction box with an extension part being a connector plug part;

FIG. 3 is an exploded view of the junction box body;

FIG. 4 is a schematic view of the internal structure of the bottom surface of the integrated junction box;

The junction box comprises a junction box body 1, a base 2, an extension part 3, an external connector 4, a cable 5, a box body 11, an upper cover 12, a conductive module 13, a bypass protection module 14, a bus duct slot 15, a positioning column 16, a bottom wall 21, front and rear side walls 22, connecting ribs 23, an upper wall 24, a guide duct slot 25, a clamping slot 31 and a connector plug-in part 32.

Detailed Description

For a further understanding of the objects, construction, features, and functions of the utility model, reference should be made to the following detailed description of the preferred embodiments.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-4, an integrated junction box includes a junction box body 1 and a base 2, wherein M spaces for accommodating the junction box body 1 are provided on the base 2, and M junction box bodies 1 are fixed therein in a one-to-one correspondence, wherein M is a natural number and M >1, and extension portions 3 are further provided at outer ends of the junction box bodies 1 at leftmost and rightmost ends, and an external connector 4 is connected to the extension portions 3 and is electrically connected to the inside of the corresponding junction box body 1.

When photovoltaic power generation system builds, use the trisomy terminal box can make every terminal box body 11 install respectively in adjacent dual glass photovoltaic module's clearance, but need install three or more terminal box bodies 11 in proper order to converging the area, and repeated operation just repeatedly aims at converging the area, wastes time and energy, inefficiency.

According to the integrated junction box provided by the utility model, the base 2 is designed according to the installation standard and the requirement of the existing photovoltaic power generation system, all junction box bodies 1 needing to be installed are fixed at the corresponding positions of the base 2, the M junction box bodies in the integrated junction box are in connected states, and when the integrated junction box is used, the external connector 4 is only required to be directly connected with the extending parts at the two ends, so that the electric connection with the M junction box bodies in the junction box can be realized, therefore, when the integrated junction box is installed, the bus belt is directly installed on the base 2 at one time, each junction box body 11 does not need to be aligned in sequence and installed respectively, and the installation efficiency is greatly improved.

In practical production and use, the terminal box extension part of the utility model also has different structures, is used for adapting to different external connectors and is convenient to connect with the external connectors, and specifically comprises at least the following two extension part structures:

First, as shown in fig. 1, the extension portion 3 is a clamping groove 31, one end of the cable 5 passes through the clamping groove 31 and is electrically connected with the corresponding inside of the junction box body 1, the other end of the cable 5 is connected with the external connector 4, that is, the external connector 4 extends into the extension portion 3 through the cable 5 to be fixed, and the cable 5 is connected with the conductive module 13 in the box body 11, and can be in a connection mode such as resistance welding, riveting, laser welding or crimping, so as to be electrically connected with the inside of the corresponding junction box body 1.

Second, as shown in fig. 2, the extension portion 3 is a connector plugging portion 32 integrally connected with the junction box body 1, a metal pin is disposed in the connector plugging portion 32, the metal pin is electrically connected with the corresponding junction box body 1, and the external connector 4 is directly connected with the connector plugging portion 32 in a plugging manner.

Depending on the actual use, the extension of the utility model may also be designed to match with other structures of the external connector 4, facilitating the connection between the external connector 4 and the junction box of the utility model.

In one embodiment, the base 2 is in a shape of a long bar, and the M terminal box bodies 1 are sequentially arranged in M spaces for accommodating the terminal box bodies 1 along the extending direction of the base 2. In most cases, m=3 is a three-split junction box which is widely used at present, and comprises a negative junction box, a middle junction box and a complete machine junction box, in some application scenarios, M is greater than or equal to 3, the length and thickness of the base 2 and M spaces for accommodating the junction box body 1 on the base 2 are all manufactured according to requirements and standards in practical situations, and when in use, the junction box body 1 is not required to be aligned with the junction bus strip one by one, and then the junction box is installed, and only the integrated junction box is required to be integrally connected with the junction bus strip and directly installed.

In one embodiment, the junction box body 1 and the base 2 are integrally formed or detachably connected and fixed. Wherein the detachable connection mode can be in the forms of plugging, buckling and the like.

In one embodiment, as shown in fig. 3, the junction box body 1 includes a box body 11, an upper cover 12, a conductive module 13 and a bypass protection element 14, wherein the box body 11 is disposed in the base 2, the upper cover 12 is detachably fastened to 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 on-axis diode, or a chip diode, or an integrated circuit module with bypass protection.

In a preferred embodiment, as shown in fig. 3, a bus bar slot 15 is provided at the bottom of the box 11, and the bus bar is connected to the conductive module 13 through the bus bar slot 15, so as to facilitate direct installation of the bus bar and fix the position thereof, thereby improving installation efficiency. Furthermore, the converging belt groove 15 is of a horn-shaped structure with a narrow upper part and a wide lower part, so that the converging belt can easily penetrate into the converging belt groove 15 from a wider side and is fixed by the narrower side, the mounting efficiency is higher, and the fixing effect is better.

The inner bottom of the box 11 is correspondingly provided with a positioning column 16 for fixedly mounting the conductive module 13.

In one embodiment, the base 2 includes a bottom wall 21, front and rear side walls 22, and an upper wall 24, further, the top of the upper wall 24 is provided with at least two diversion trenches 25 for guiding and converging the top water flow of the box 11 to the outside of the box, and the diversion trenches 25 also serve as cable grooves for clamping cables in the cable grooves when the cable is carried on the extension 3 or the external connector 4. The diversion trench 25 can be arranged along the direction of the shorter side of the upper wall 24, the two ends respectively extend to the end parts of the upper wall 24, and when in actual use, if water drops or water flows and the like fall on the junction box, the accumulated water flows are converged into the diversion trench 25 and slide out of the junction box along the diversion trench 25, so that accumulated water is prevented from penetrating into the junction box body 1 and damaging electrical components. Furthermore, the size and shape of the diversion trench 25 can be set to be matched with the cable directly connected with the extension part 3 or the cable connected with the external connector 4, so that the overlong cable can be clamped in the diversion trench 25 during transportation or installation, thereby playing the roles of attractive appearance, neatness and space occupation reduction.

In a more preferred embodiment, as shown in fig. 4, the bottom wall 21 is a hollow frame, a plurality of connecting ribs 23 are arranged in the bottom wall 21, the connecting ribs 23 connect the front and rear side walls 22 and each junction box body 1, the slender base 2 is easily broken, and the connecting ribs 23 can play a good role in reinforcement.

More preferably, the top of the upper wall 24 is flush with the top of the junction box body 1, so that the junction box is more attractive and elegant overall, and the box cover of the junction box body 1 can be effectively prevented from falling off.

The utility model has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the utility model. It should be noted that the disclosed embodiments do not limit the scope of the utility model. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. The integrated junction box is characterized by comprising a junction box body and a base, wherein M spaces for accommodating the junction box bodies are formed in the base, the M junction box bodies are fixed in the junction box body in a one-to-one correspondence manner, M is a natural number and M is more than 1, extension parts are further arranged at the outer end parts of the junction box bodies at the leftmost end and the rightmost end, and an external connector is connected to the extension parts and is electrically connected with the interiors of the corresponding junction box bodies.

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

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

4. The integrated junction box of claim 1, wherein said junction box body comprises a box body, an upper cover, a conductive module and a bypass protection element, said box body is disposed in said base, said upper cover is detachably fastened to said box body, and said conductive module and said bypass protection element are mounted inside said box body.

5. The integrated junction box of claim 4 wherein said bottom of said box body is provided with a strap slot through which a strap is connected to said conductive module.

6. The integrated junction box according to claim 1, wherein the extending portion is a clamping groove, one end of the cable passes through the clamping groove to be electrically connected with the inside of the corresponding junction box body, and the other end of the cable is connected with an external connector.

7. The integrated junction box according to claim 1, wherein the extension part is a connector plugging part integrally connected with the junction box body, a metal pin is arranged in the connector plugging part and is electrically connected with the corresponding interior of the junction box body, and the external connector is directly connected with the connector plugging part in a plugging manner.

8. The integrated terminal box of claim 1, wherein the base includes a bottom wall, front and rear side walls, and an upper wall.

9. The integrated junction box according to claim 8, wherein a diversion trench is formed in the top of the upper wall, the diversion trench is used for guiding and converging water flow at the top of the junction box body and flowing out of the junction box, and the diversion trench is also used as a cable slot for clamping the cable in the cable slot when the cable is arranged on the extending part or the external connector.

10. The integrated junction box according to claim 8, wherein the bottom wall is a hollow frame body, a plurality of connecting ribs which are vertically and horizontally crossed are arranged in the bottom wall, and the connecting ribs are connected with the front side wall, the rear side wall and the junction box bodies.