CN216721275U

CN216721275U - Photovoltaic junction box and photovoltaic module

Info

Publication number: CN216721275U
Application number: CN202220058294.3U
Authority: CN
Inventors: 张�浩; 王建华
Original assignee: Jiangsu Zerun New Material Co ltd
Current assignee: Jiangsu Zerun Xinneng Technology Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-06-10
Anticipated expiration: 2032-01-11

Abstract

The utility model discloses a photovoltaic junction box which comprises a box body, wherein the box body is provided with an accommodating cavity, and the bottom of the box body is provided with a plurality of bus bar through holes; the diode is arranged in the accommodating cavity, and the plane where the diode is located is parallel to the bottom surface of the box body; and one bus bar penetrates through one bus bar through hole to enter the accommodating cavity, the part of the bus bar in the accommodating cavity is tightly attached to the upper surface of the diode, and the bus bar is connected with the diode through laser welding. The utility model can reduce the occurrence of poor welding and improve the working efficiency.

Description

Photovoltaic junction box and photovoltaic module

Technical Field

The utility model relates to the technical field of junction boxes, in particular to a photovoltaic junction box and a photovoltaic assembly.

Background

The photovoltaic junction box is a connecting device between a solar cell array formed by solar cell modules and the solar charging control device, and is mainly used for connecting and protecting the solar cell modules, connecting electric power generated by the solar cells with an external circuit and conducting current generated by the photovoltaic modules.

At present, the connection mode between the diode and the bus bar inside the photovoltaic junction box is mostly a soldering mode. Soldering is a welding method in which a low-melting-point metal solder is melted by heating and then penetrates into and fills a gap at a joint of metal parts. Soldering is generally performed manually, so that insufficient soldering and the like are likely to occur, and the soldering effect is poor.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: poor welding's technical problem appears easily in the connected mode of solving diode and busbar among the prior art. The utility model provides a method.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a photovoltaic junction box, comprising: the box body is provided with an accommodating cavity, and the bottom of the box body is provided with a plurality of bus bar through holes; the diode is arranged in the accommodating cavity, and the plane where the diode is located is parallel to the bottom surface of the box body; the bus bars penetrate through the bus bar through holes to enter the accommodating cavity, the parts of the bus bars located in the accommodating cavity are tightly attached to the upper surface of the diode, and the bus bars are connected with the diode through laser welding.

Furthermore, a first flat plate and a second flat plate are respectively arranged on two sides of the diode, and the upper surface of the first flat plate and the upper surface of the second flat plate are respectively connected with the bus bar in a laser welding mode.

Further, the diode is an axial diode.

Further, the diode is a module diode.

Further, a first supporting component and a second supporting component are fixedly arranged at the bottom of the box body, the first supporting component is located below the first flat plate, the first flat plate is in contact with the first supporting component, the second supporting component is located below the second flat plate, and the second flat plate is in contact with the second supporting component.

Furthermore, the direction of the diode away from the bus bar through hole is taken as the front, the first support assembly sequentially comprises a first support column, a second support column and a third support column from front to back, the first support column, the second support column and the third support column are equal in height, the first support column is located below the front portion of the first flat plate, the second support column is located below the middle portion of the first flat plate, and the third support column is located below the rear portion of the first flat plate.

Further, the direction of the diode away from the bus bar through hole is taken as the front, the second support assembly sequentially comprises a fourth support column, a fifth support column and a sixth support column from front to back, the fourth support column, the fifth support column and the sixth support column are equal in height, the fourth support column is located below the front portion of the second flat plate, the fifth support column is located below the middle portion of the second flat plate, and the sixth support column is located below the rear portion of the second flat plate.

Furthermore, the top of the third support column is T-shaped.

Furthermore, the top of the sixth support column is T-shaped.

The utility model also provides a photovoltaic assembly which comprises the photovoltaic junction box.

The bus bar and the diode laser welding device have the advantages that the bus bar and the diode are kept relatively flat, so that laser welding can be performed between the bus bar and the diode, the occurrence of poor welding is reduced, and the working efficiency is improved.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of a photovoltaic junction box of the present invention.

Fig. 2 is a schematic structural view of the cartridge of the present invention.

Fig. 3 is a first cross-sectional view of the photovoltaic junction box of the present invention.

Fig. 4 is a second cross-sectional view of the photovoltaic junction box of the present invention.

In the figure: 1. box body, 2, diode, 3, busbar, 11, hold the chamber, 12, busbar perforation, 13, first supporting component, 14, second supporting component, 131, first support column, 132, second support column, 133, third support column, 141, fourth support column, 142, fifth support column, 143, sixth support column, 21, first flat board, 22, the second flat board.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 4, a photovoltaic junction box includes a box body 1, a diode 2, and a plurality of bus bars 3. The box body 1 is provided with an accommodating cavity 11, a plurality of bus bar through holes 12 are formed in the bottom of the box body 1, and the bus bar through holes 12 are used for bus bar penetration. The diode 2 is arranged in the accommodating cavity 11, and the plane of the diode 2 is parallel to the bottom surface of the box body 1. A bus bar 3 passes through a bus bar through hole 12 and enters the accommodating cavity 11, the part of the bus bar 3 in the accommodating cavity 11 is tightly attached to the upper surface of the diode 2, and the bus bar 3 is connected with the diode 2 through laser welding. The diode 2 is disposed parallel to the bottom surface of the case 1 to facilitate laser welding between the diode 2 and the bus bar 3. Laser welding is an efficient and precise welding method using a laser beam with high energy density as a heat source, and welding parts need to be in contact with each other and are kept as flat as possible. Therefore, the diode 2 needs to be kept parallel to the bottom surface of the case 1, and after the bus bar 3 passes through the bus bar penetration hole 12, the end of the bus bar 3 is bent so that the portion of the bus bar 3 located in the accommodation chamber 11 is parallel to the diode 2, and thus, when the diode 2 and the bus bar 3 are laser-welded, the welding effect can be further ensured.

Specifically, a first flat plate 21 and a second flat plate 22 are respectively disposed on both sides of the diode 2, and an upper surface of the first flat plate 21 and an upper surface of the second flat plate 22 are respectively connected to the bus bar 3 by laser welding (for example, a laser beam may be applied to the bus bar 3 from directly above the bus bar 3 to melt the bus bar 3, thereby welding the bus bar 3 to the upper surface of the first flat plate 21 and the upper surface of the second flat plate 22). The first plate 21 and the second plate 22 are both parallel to the bottom surface of the case 1. The first plate 21 and the second plate 22 are preferably flat surfaces so as to be closely attached to the bus bar 3, thereby ensuring a welding effect.

In an embodiment, the diode 2 may be an axial diode or a modular diode. When the diode 2 is an axial diode, the first plate 21 and the second plate 22 may be obtained by flattening two legs of the axial diode. When the diode is a module diode, the first plate 21 and the second plate 22 may be a part on the positive and negative terminals.

Specifically, when the diode 2 is an axial diode, the bottom of the box body 1 is fixedly provided with a first supporting component 13 and a second supporting component 14, the first supporting component 13 is located below the first flat plate 21, the first flat plate 21 is in contact with the first supporting component 13, the second supporting component 14 is located below the second flat plate 22, and the second flat plate 22 is in contact with the second supporting component 14. The first and

second support members

13 and 14 serve to support the first and second

flat plates

21 and 22, respectively, so that the first and second

flat plates

21 and 22 can be kept stable when laser welding is performed.

With the direction that the diode 2 is far away from the busbar perforation 12 as the place ahead, the first support assembly 13 includes first support column 131, second support column 132 and third support column 133 from the front backward in proper order, first support column 131, second support column 132 and third support column 133 are as high as one another (so can further guarantee the stability of first dull and stereotyped 21), first support column 131 is located the anterior below of first dull and stereotyped 21, second support column 132 is located the below in first dull and stereotyped 21 middle part, third support column 133 is located the below at first dull and stereotyped 21 rear portion, in other words, first support column 131, second support column 132 and third support column 133 can be the triangle-shaped structure, play omnidirectional support to first dull and stereotyped 21, guarantee the quality of laser welding. Specifically, the top of the third supporting column 133 is T-shaped, so that the supporting area can be increased, and the support is more stable.

With the direction of the diode 2 away from the bus bar through hole 12 as the front, the second support assembly 14 sequentially includes a fourth support column 141, a fifth support column 142, and a sixth support column 143, the heights of the fourth support column 141, the fifth support column 142, and the sixth support column 143 are equal to each other (so as to further ensure the stability of the second flat plate 22), the fourth support column 141 is located below the front of the second flat plate 22, the fifth support column 142 is located below the middle of the second flat plate 22, and the sixth support column 143 is located below the rear of the second flat plate 22. Specifically, the top of the sixth supporting column 143 is T-shaped, so that the supporting area can be increased, and the support is more stable.

In summary, according to the photovoltaic junction box disclosed by the utility model, the diode 2 is arranged in parallel with the bottom surface of the box body 1, and the bus bar 3 is tightly attached to the upper surface of the diode 2, so that the diode 2 and the bus bar 3 can be subjected to laser welding, the occurrence of poor welding can be reduced, and the production efficiency can be improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined by the scope of the claims.

Claims

1. A photovoltaic junction box, comprising:

the box body (1), the box body (1) has a containing cavity (11), and the bottom of the box body (1) is provided with a plurality of bus bar through holes (12);

the diode (2) is installed in the accommodating cavity (11), and the plane where the diode (2) is located is parallel to the bottom surface of the box body (1);

the bus bars (3) penetrate through the bus bar through holes (12) to enter the accommodating cavity (11), the parts, located in the accommodating cavity (11), of the bus bars (3) are tightly attached to the upper surface of the diode (2), and the bus bars (3) are connected with the diode (2) in a laser welding mode.

2. The pv junction box according to claim 1, wherein a first plate (21) and a second plate (22) are respectively provided on both sides of the diode (2), and an upper surface of the first plate (21) and an upper surface of the second plate (22) are respectively connected to the bus bar (3) by laser welding.

3. The photovoltaic junction box according to claim 2, characterized in that the diodes (2) are axial diodes.

4. The photovoltaic junction box according to claim 2, characterized in that the diode (2) is a module diode.

5. The photovoltaic junction box according to claim 3, characterized in that a first supporting component (13) and a second supporting component (14) are fixedly arranged at the bottom of the box body (1), the first supporting component (13) is positioned below the first flat plate (21), the first flat plate (21) is in contact with the first supporting component (13), the second supporting component (14) is positioned below the second flat plate (22), and the second flat plate (22) is in contact with the second supporting component (14).

6. The PV junction box according to claim 5, wherein the first supporting assembly (13) sequentially comprises a first supporting column (131), a second supporting column (132) and a third supporting column (133) from front to back, the first supporting column (131), the second supporting column (132) and the third supporting column (133) have the same height, the first supporting column (131) is located under the front portion of the first plate (21), the second supporting column (132) is located under the middle portion of the first plate (21), and the third supporting column (133) is located under the rear portion of the first plate (21), the diode (2) is far away from the busbar perforation (12).

7. The photovoltaic junction box of claim 5, wherein the second support assembly (14) comprises a fourth support column (141), a fifth support column (142) and a sixth support column (143) in sequence from front to back with the direction of the diode (2) away from the bus bar through hole (12) as front, the fourth support column (141), the fifth support column (142) and the sixth support column (143) are equal in height, the fourth support column (141) is located below the front of the second plate (22), the fifth support column (142) is located below the middle of the second plate (22), and the sixth support column (143) is located below the rear of the second plate (22).

8. The photovoltaic junction box of claim 6, wherein the top of the third support column (133) is T-shaped.

9. The photovoltaic junction box of claim 7, wherein the top of the sixth support column (143) is T-shaped.

10. A photovoltaic module comprising a photovoltaic junction box according to any of claims 1 to 9.