CN218734181U - Junction box and photovoltaic module - Google Patents
Junction box and photovoltaic module Download PDFInfo
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- CN218734181U CN218734181U CN202222714739.1U CN202222714739U CN218734181U CN 218734181 U CN218734181 U CN 218734181U CN 202222714739 U CN202222714739 U CN 202222714739U CN 218734181 U CN218734181 U CN 218734181U
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- junction box
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- bus bar
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The embodiment of the application relates to the technical field of new photovoltaic energy, in particular to a junction box, wherein the junction box is fixed on one side, away from a cell sheet of a photovoltaic laminating part, of a back plate of the photovoltaic laminating part and used for guiding electric power generated by the photovoltaic laminating part to an external circuit; the junction box is provided with a welding end, at least part of end face of the welding end is used for being opposite to and parallel to each other with partial surface of a bus bar of the photovoltaic laminating piece, and the welding end is used for being flat and flat with the bus bar and being fixed with the bus bar and the opposite part through laser welding. The embodiment of the application also provides a photovoltaic module. The junction box and the photovoltaic module provided by the embodiment of the application can enable the welding ends of the bus bar of the photovoltaic laminating part and the junction box to be mutually fixed and electrically connected, and the steps of the implementation process are fewer.
Description
Technical Field
The embodiment of the application relates to the technical field of photovoltaic new energy, in particular to a junction box and a photovoltaic module.
Background
With the development of scientific technology, photovoltaic technology is also rapidly developed. The photovoltaic technology is a technology that can directly convert solar light energy into electric energy. When the photovoltaic technology is specifically implemented, the light receiving surface of the photovoltaic lamination piece is used for receiving light irradiated by the sun, so that the cell sheet of the photovoltaic lamination piece converts the light energy of the sun into electric energy, then the bus bar of the photovoltaic lamination piece is used for transmitting the electric energy converted from the cell sheet of the photovoltaic lamination piece to the junction box, and then the electric power is led out through the junction box for the user to use.
Before the electric energy converted from the cell string of the photovoltaic lamination is transmitted to the junction box by using the bus bar of the photovoltaic lamination, the bus bar of the photovoltaic lamination and the welding end of the junction box need to be fixed and electrically connected with each other. However, the related art is troublesome in the step of performing a process of fixing and electrically connecting the bus bar of the photovoltaic laminate and the soldering terminal of the junction box to each other.
SUMMERY OF THE UTILITY MODEL
An object of the embodiments of the present application is to provide a junction box and a photovoltaic module, so that there are fewer steps of an implementation process for fixing and electrically connecting a bus bar of a photovoltaic laminate and a welding end of the junction box to each other.
In order to solve the above problems, embodiments of the present application provide a junction box, which is fixed on one side of a back sheet of a photovoltaic laminate, away from a cell sheet of the photovoltaic laminate, and is used for guiding electric power generated by the photovoltaic laminate to an external circuit; the junction box is provided with a welding end, at least part of end face of the welding end is used for being opposite to and parallel to each other with partial surface of a bus bar of the photovoltaic laminating piece, and the welding end is used for being opposite to and parallel to each other with the bus bar and is flat in surface and used for being fixed with the bus bar and the opposite part through laser welding.
In addition, this application embodiment still provides a photovoltaic module, includes: photovoltaic laminates and the junction boxes described above; the photovoltaic laminating part is provided with a plurality of battery pieces, welding strips, a back plate and bus bars, wherein the battery pieces are connected through the welding strips to form battery strings, the battery strings and the back plate are stacked, the welding strips are connected with the bus bars, and the bus bars penetrate through openings in the back plate and are connected with welding ends of a junction box; the junction box is arranged on the back plate.
When the junction box and the photovoltaic module provided by the embodiment of the application are used, as the welding end is opposite to the bus bar and at least part of the end faces parallel to each other, the part opposite to the bus bar and the welding end is fixed by laser welding; therefore, the electric energy converted from the battery string of the photovoltaic laminating part can be transmitted to the junction box through the bus bar of the photovoltaic laminating part, and then the electric power is led out through the junction box to be used by a user.
Because the welding end is used for being fixed with the bus bar through laser welding, when the welding end and the bus bar are fixed with each other and electrically connected, the welding end and the bus bar are not required to be fixed with each other and electrically connected by adopting a tin soldering mode like the related technology, tin is not required to be arranged on the welding end like the related technology, and a tin storage groove is not required to be arranged on the welding end like the related technology, so that the steps of the implementation process for fixing the bus bar of the photovoltaic laminated part and the welding end of the junction box with each other and electrically connected are fewer.
In addition, because the welding end is used for being opposite to the bus bar and being parallel to each other, at least part of the end face is a flat surface, and is used for being fixed with the bus bar and the opposite part thereof through laser welding, when the bus bar is fixed on the junction box through laser welding, the bus bar is fixed on the flat surface of the welding end opposite to the bus bar and being parallel to each other through welding, and then the bus bar and the welding end can have enough stability after being fixed through laser welding.
In some embodiments, the welding end has an alignment area, and the surface of the alignment area is a flat surface; part of end faces of the welding ends are used for being opposite to the bus bars and are arranged in parallel, and the area where the part of end faces are located is an opposite area; the area of the alignment area is larger than that of the opposite area, and the opposite area is located in the alignment area.
In some embodiments, the dimension of the facing area in the first direction is 3mm to 5mm, the facing area having a spacing of not less than 2mm from any of the two first edges.
In some embodiments, the dimension of the facing area in the first direction is 3mm to 5mm, the facing area having a spacing of not less than 2mm from any of the two first edges.
In some embodiments, the partial region in the facing region is a welding region for fitting and welding-fixing with a portion of the bus bar extending in a second direction, the first direction being perpendicular to the second direction; the alignment region has two second edges oppositely disposed in the second direction, and the welding region is located between the two second edges with a space therebetween.
In some embodiments, the dimension of the welding zone in the second direction is between 3mm and 5mm, the welding zone having a spacing from any of the two second edges of no less than 2 mm.
In some embodiments, the number of solder terminals is two, the two solder terminals being for connection with different bus bars of the same photovoltaic laminate.
In some embodiments, the junction box further comprises a diode, one end of the diode being connected to one of the two bonding terminals and the other end being connected to the other of the two bonding terminals.
In some embodiments, the two bonding terminals are oppositely disposed on both sides of the diode.
In some embodiments, the diode is located between the two welding terminals, and the two welding terminals and the diode are distributed in a U shape.
Drawings
FIG. 1 is a schematic structural view of a junction box provided in some embodiments of the present application;
fig. 2 is a schematic structural view of a junction box and a bus bar provided in some embodiments of the present disclosure after being engaged;
FIG. 3 is a schematic structural view of a junction box provided in some embodiments of the present application;
fig. 4 is a schematic structural diagram of a junction box according to some embodiments of the present application.
In the drawings, the reference numerals are as follows:
a bus bar 201.
Detailed Description
As known from the background art, before the electric energy converted from the cell string of the photovoltaic laminate is transmitted to the junction box by using the bus bar of the photovoltaic laminate, the bus bar of the photovoltaic laminate and the welding end of the junction box need to be fixed and electrically connected to each other. The related art is complicated in the step of performing the process of fixing and electrically connecting the bus bar of the photovoltaic laminate and the welding end of the junction box to each other.
The inventors of the present application have found that the related art is achieved by soldering when the bus bar of the photovoltaic laminate and the welding terminal of the junction box are fixed to each other and electrically connected. When a tin soldering mode is adopted, tin is required to be arranged on a welding end; in order to facilitate the arrangement of tin on the welding end, a tin storage tank is also arranged on the welding end. Thereby rendering the related art cumbersome in the step of performing a process of fixing and electrically connecting the bus bar of the photovoltaic laminate and the soldering terminal of the junction box to each other.
In this regard, the inventors of the present application have devised a junction box which is fixed to a side of a backsheet of a photovoltaic laminate away from a cell sheet of the photovoltaic laminate and serves to guide electricity generated from the photovoltaic laminate to an external circuit; the junction box is provided with a welding end, at least part of end face of the welding end is used for being opposite to and parallel to each other with partial surface of a bus bar of the photovoltaic laminating piece, and the welding end is used for being opposite to and parallel to each other with the bus bar and is flat in surface and used for being fixed with the bus bar and the opposite part through laser welding.
When the junction box designed by the inventor is used, as the welding end is opposite to the bus bar and at least partial end faces parallel to each other, the part opposite to the bus bar and the welding end is fixed by laser welding; therefore, the electric energy converted from the battery string of the photovoltaic laminating part can be transmitted to the junction box through the bus bar of the photovoltaic laminating part, and then the electric power is led out through the junction box to be used by a user.
Because the welding end is used for being fixed with the bus bar through laser welding, when the welding end and the bus bar are fixed with each other and electrically connected, the welding end and the bus bar are not required to be fixed with each other and electrically connected by adopting a tin soldering mode like the related technology, tin is not required to be arranged on the welding end like the related technology, and a tin storage groove is not required to be arranged on the welding end like the related technology, so that the steps of the implementation process for fixing the bus bar of the photovoltaic laminated part and the welding end of the junction box with each other and electrically connected are fewer.
In addition, because the welding end is used for being opposite to the bus bar and being parallel to each other, at least part of the end face is a flat surface, and is used for being fixed with the bus bar and the opposite part thereof through laser welding, when the bus bar is fixed on the junction box through laser welding, the bus bar is fixed on the flat surface of the welding end opposite to the bus bar and being parallel to each other through welding, and then the bus bar and the welding end can have enough stability after being fixed through laser welding.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following describes each embodiment of the present application in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in various embodiments of the present application in order to provide a better understanding of the present application. However, the technical means claimed in the present application can be realized by various changes and modifications of the following embodiments.
Referring to fig. 1 to 4, in the junction box 100 provided in some embodiments of the present application, the junction box 100 is fixed to a side of a back sheet (not shown in the drawings) of a photovoltaic laminate away from a cell sheet (not shown in the drawings) of the photovoltaic laminate and serves to guide electricity generated from the photovoltaic laminate to an external wiring; the junction box 100 is provided with a welding end 110, at least part of the end face of the welding end 110 is used for facing partial surface of the bus bar 201 of the photovoltaic laminate and being arranged in parallel with each other, at least part of the end face of the welding end 110, which is used for facing the bus bar 201 and is parallel with each other, is a flat surface, and is used for being fixed with the bus bar 201 and the facing part thereof through laser welding.
It should be noted that the photovoltaic laminate referred to in this application may also include other components, which are not limited in this application. In one example, the photovoltaic laminate further includes an adhesive film (not shown in the figures) between the cell sheet and the back sheet. In yet another example, the photovoltaic laminate further comprises a front panel (not shown in the figures) positioned on the side of the cell sheet away from the back sheet, in which case an adhesive film (not shown in the figures) may also be positioned between the front panel and the cell sheet. In yet another example, the photovoltaic laminate further includes a solder ribbon, the number of the cell pieces is plural, and the plural cell pieces are connected via the solder ribbon to form a cell string.
In some embodiments, the soldering terminal 110 has an alignment region 111, and a surface of the alignment region 111 is a flat surface; part of the end face of the welding end 110 is arranged opposite to the bus bar 201 and parallel to each other, and the area where the part of the end face is located is the opposite area 112; the area of the alignment region 111 is larger than that of the opposite region 112, and the opposite region 112 is located in the alignment region 111.
In this way, in the process of aligning the partial surface of the bus bar 201 with the facing area 112 before the bus bar 201 and the welding terminal 110 are laser-welded, even if an error occurs so that the partial surface of the bus bar 201 is not completely aligned with the facing area 112, it can be ensured that the partial surface of the bus bar 201 is aligned with the alignment area 111 as far as possible, so as to ensure that the bus bar 201 and the welding terminal 110 can still be fixed by laser welding.
In addition, since the surface of the alignment region 111 is a flat surface, no matter where the bus bar 201 and the alignment region 111 are fixed by laser welding, the bus bar 201 and the welding terminal 110 can have sufficient stability after being fixed by welding.
In one example, the alignment region 111 is a partial end surface of the welding end 110. In yet another example, the registration area 111 is the entire end face of the welding tip 110.
In some examples, the alignment area 111 has two first edges 113 oppositely disposed in a first direction (i.e., the X direction shown in fig. 1, 3, and 4), and the facing area 112 is located between the two first edges 113 and has a space between any one of the two first edges 113.
In this way, in the process of aligning the partial surface of the bus bar 201 with the facing area 112, no matter whether the bus bar 201 is offset in the first direction or in the opposite direction of the first direction, it can be ensured that the partial surface of the bus bar 201 is disposed facing the alignment area 111, so as to ensure that the bus bar 201 can still be fixed with the welding end 110 by laser welding.
It should be noted that, in the present application, the size of the alignment area 112 in the first direction is not limited, and the distance between the alignment area 112 and any one of the two first edges 113 is also not limited.
In some examples, the dimension of the facing area 112 in the first direction is 3mm-5mm, with a spacing of no less than 2mm between the facing area 112 and either of the two first edges 113. In one example, the dimension of the facing area 112 in the first direction is 4mm, with a spacing of 2mm between the facing area 112 and either of the two first edges 113.
Note that, in this embodiment, the size of the facing region 112 in the first direction may be the same as the size of the bus bar 201 in the first direction, where the first direction may be the width direction of the bus bar 201.
In some embodiments, the partial region in the facing region 112 is a welding region 114, and the welding region 114 is used for fitting and welding-fixing with a portion of the bus bar 201 extending in a second direction (i.e., a Y direction shown in fig. 1, 3, and 4), the first direction being perpendicular to the second direction; the alignment region 111 has two second edges 115 oppositely disposed in the second direction, and the welding region 114 is located between the two second edges 115 with a space therebetween.
In this way, during the process of fixing the partial surface of the bus bar 201 and the welding area 114 of the welding end 110 by laser welding, no matter whether the bus bar 201 is deviated along the second direction or along the opposite direction of the second direction, the partial surface of the bus bar 201 can be ensured to be arranged opposite to the alignment area 111, so as to ensure that the bus bar 201 can still be fixed with the alignment area 111 of the welding end 110 by laser welding.
It should be noted that, the size of the welding region 114 in the second direction is not limited, and the distance between the welding region 114 and any one of the two second edges 115 is also not limited.
In some examples, the dimension of the welding region 114 in the second direction is 3mm to 5mm, with a spacing of no less than 2mm between the welding region 114 and either of the two second edges 115. In one example, the dimension of the welding region 114 in the first direction is 4mm, with a spacing of 2mm between the welding region 114 and either of the two second edges 115.
In this embodiment, the length direction of the portion of the bus bar 201 that is attached to the welding region 114 and is welded and fixed may be the second direction.
Note that, the present application does not limit a welding pattern (not shown in the drawings) after the bus bar 201 is attached to the welding region 114 and welded and fixed. In some examples, the weld pattern may be a plurality of straight lines, curved lines, or broken lines. In still other examples, the welding pattern may be a linear structure enclosing a closed pattern, and in this case, the linear structure enclosing the closed pattern may further include a welding pattern therein.
In some embodiments, the number of the solder terminals 110 is two, and two solder terminals 110 are used to connect with different bus bars 201 of the same photovoltaic laminate.
In this embodiment, the junction box 100 may further include a diode 120, and one end of the diode 120 is connected to one of the two soldering terminals 110, and the other end is connected to the other of the two soldering terminals 110. In this manner, the diode 120 may be utilized to protect the light receiving surface of the photovoltaic laminate when it is shadowed.
In some examples, the two bonding terminals 110 are oppositely disposed on two sides of the diode 120. At this time, the two welding ends 110 may have the same shape and size (as shown in fig. 1 and 2); the two weld ends 110 may also be different in shape and size (as shown in fig. 3). This is not limited in this application.
In still other examples, the diode 120 is located between the two bonding terminals 110, and the two bonding terminals 110 and the diode 120 are distributed in a "U" shape (as shown in fig. 4).
The present application further provides a photovoltaic module, comprising a photovoltaic laminate and the junction box 100 of the above embodiment; the photovoltaic laminating part is provided with a plurality of battery sheets, welding strips, a back plate and bus bars 201, wherein the battery sheets are connected through the welding strips to form a battery string, the battery string and the back plate are arranged in a laminating mode, the welding strips are connected with the bus bars 201, and the bus bars 201 penetrate through openings in the back plate and are connected with the welding ends 110 of the junction box 100; the junction box 100 is disposed on the back panel.
The junction box 100 related to this embodiment is the same as the junction box 100 related to the other embodiments, and therefore, the photovoltaic module related to this embodiment has the same beneficial effects as the junction box 100 related to the other embodiments, and the description thereof is omitted.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the application, and it is intended that the scope of the application be limited only by the claims appended hereto.
Claims (11)
1. A junction box is characterized in that a plurality of connecting terminals are arranged on the junction box,
the junction box is fixed on one side of the back plate of the photovoltaic laminating part, which is far away from the cell sheet of the photovoltaic laminating part, and is used for guiding the electric power generated by the photovoltaic laminating part to an external circuit;
the junction box is provided with a welding end, at least part of end face of the welding end is used for being opposite to and parallel to each other with partial surface of a bus bar of the photovoltaic laminating piece, and the welding end is used for being flat and flat with the bus bar and being fixed with the bus bar and the opposite part through laser welding.
2. The junction box of claim 1,
the welding end is provided with an alignment area, and the surface of the alignment area is a flat surface;
part of end face of the welding end is used for being opposite to the bus bar and being arranged in parallel, and the area where the part of end face is located is an opposite area;
the area of the alignment area is larger than that of the opposite area, and the opposite area is located in the alignment area.
3. The junction box of claim 2,
the alignment area is provided with two first edges oppositely arranged in a first direction, and the opposite area is located between the two first edges and has a space with any one of the two first edges.
4. The junction box of claim 3,
the size of the facing area in the first direction is 3mm-5mm, and the facing area and any one of the two first edges have a space of not less than 2 mm.
5. The junction box according to claim 3 or 4,
a part of the facing area is a welding area, the welding area is used for being attached to and welded and fixed with a part of the bus bar extending along a second direction, and the first direction is perpendicular to the second direction;
the alignment region has two second edges oppositely disposed in the second direction, and the welding region is located between the two second edges with a space therebetween.
6. The junction box of claim 5,
the dimension of the welding area in the second direction is 3mm-5mm, and the welding area has a spacing of not less than 2mm from any one of the two second edges.
7. The junction box of claim 1, wherein the number of said solder terminals is two, two for connection with different bus bars of the same photovoltaic laminate.
8. The junction box of claim 7, further comprising a diode having one end connected to one of said two soldering terminals and another end connected to the other of said two soldering terminals.
9. The junction box of claim 8, wherein said two solder terminals are disposed on opposite sides of said diode.
10. The junction box of claim 8, wherein the diode is located between the two solder terminals, and the two solder terminals and the diode are distributed in a "U" shape.
11. A photovoltaic module, comprising: a photovoltaic laminate and the junction box of any of claims 1-10;
the photovoltaic laminated part is provided with a plurality of battery pieces, welding strips, a back plate and bus bars, wherein the battery pieces are connected through the welding strips to form a battery string, the battery string and the back plate are stacked, the welding strips are connected with the bus bars, and the bus bars penetrate through openings in the back plate and are connected with the welding ends of the junction box;
the junction box is arranged on the back plate.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222714739.1U CN218734181U (en) | 2022-10-13 | 2022-10-13 | Junction box and photovoltaic module |
| US18/069,217 US20240120426A1 (en) | 2022-09-30 | 2022-12-20 | Photovoltaic module and method for producing the same |
| EP22217028.4A EP4346096A1 (en) | 2022-09-30 | 2022-12-28 | Photovoltaic module and method for producing the same |
| AU2022291656A AU2022291656B1 (en) | 2022-09-30 | 2022-12-28 | Photovoltaic module and method for producing the same |
| JP2022212158A JP2024052469A (en) | 2022-09-30 | 2022-12-28 | Photovoltaic module and method for manufacturing the same |
| JP2023135935A JP7454095B1 (en) | 2022-09-30 | 2023-08-23 | Photovoltaic module and method for manufacturing photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222714739.1U CN218734181U (en) | 2022-10-13 | 2022-10-13 | Junction box and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218734181U true CN218734181U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222714739.1U Active CN218734181U (en) | 2022-09-30 | 2022-10-13 | Junction box and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218734181U (en) |
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2022
- 2022-10-13 CN CN202222714739.1U patent/CN218734181U/en active Active
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