CN213459753U - Solar cell, grid line structure thereof and photovoltaic module - Google Patents
Solar cell, grid line structure thereof and photovoltaic module Download PDFInfo
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- CN213459753U CN213459753U CN202022743887.7U CN202022743887U CN213459753U CN 213459753 U CN213459753 U CN 213459753U CN 202022743887 U CN202022743887 U CN 202022743887U CN 213459753 U CN213459753 U CN 213459753U
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Abstract
The application discloses a solar cell grid line structure which comprises a plurality of main grids, a plurality of auxiliary grids and a plurality of welding points, wherein the main grids and the auxiliary grids are vertically distributed in a crossed manner; the main grid comprises a first sub-main grid and a second sub-main grid, welding points are distributed on the first sub-main grid, and the width of the first sub-main grid is larger than that of the second sub-main grid. It is thus clear that, including many main grids in the solar cell grid line structure of this application, many vice bars, a plurality of solder joints, the main grid includes first sub-main grid and the sub-main grid of second, the solder joint distributes on first sub-main grid, the width of first sub-main grid is greater than the width of the sub-main grid of second, the main grid width of solder joint both sides is greater than the width of the main grid of keeping away from the solder joint promptly, the main grid width of solder joint both sides increases, thereby increase and weld the area of contact in area, increase weldable region, promote welded reliability. The application also provides a solar cell and a photovoltaic module.
Description
Technical Field
The application relates to the technical field of solar cells, in particular to a solar cell and a grid line structure and a photovoltaic module thereof.
Background
In order to obtain a high-efficiency solar cell, photovoltaic enterprises and research institutes improve the efficiency of the solar cell by various methods, a multi-busbar (MBB) solar cell is one of the solar cells.
The MBB solar cell adopts a design mode of adding welding spots to thin main grids, the width of the main grids is generally 0.05mm to 0.15mm, the main grids have almost no weldability due to the fact that the width of the main grids is continuously thinned, the existing solar cell grid line structure is shown in figure 1, and partial enlarged views of the existing solar cell grid line structure refer to figures 2 and 3. When in welding, only the welding points 2 on the front surface of the solar cell 1 are used as main welding points for welding, the welding strips 3 are used for connecting the welding points 2 and the back electrodes 4 of the adjacent solar cells, and the schematic diagram of the welding is shown in fig. 4. In order to consider the manufacturing cost and the quality of the solar cell, the welding spot cannot be widened and lengthened without limitation and is limited by the size of the welding spot, the weldable area of the MBB solar cell is very small, and once the welding strip and the welding spot cannot be effectively combined, insufficient welding is easily caused, so that the current collection and transmission of the whole solar cell are reduced.
Therefore, how to solve the above technical problems should be a great concern to those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solar cell and grid line structure, photovoltaic module thereof to the area of contact of solder joint and solder strip when promoting the welding strengthens welded reliability.
In order to solve the technical problem, the application provides a solar cell grid line structure, which comprises a plurality of main grids, a plurality of auxiliary grids and a plurality of welding spots, wherein the main grids and the auxiliary grids are vertically distributed in a crossed manner;
the main grid comprises a first sub-main grid and a second sub-main grid, welding points are distributed on the first sub-main grid, and the width of the first sub-main grid is larger than that of the second sub-main grid.
Optionally, in the solar cell grid line structure, the width of the first sub-main grid is sequentially narrowed from the connection position of the first sub-main grid and the welding point to the connection position of the first sub-main grid and the second sub-main grid.
Optionally, in the grid line structure of the solar cell, the width of the joint between the first sub-main grid and the welding point is 0.3mm, and the width of the joint between the first sub-main grid and the second sub-main grid is 0.1 mm.
Optionally, in the solar cell grid line structure, the method further includes:
and the width of the joint of the third sub-main grid and the welding point is greater than that of the second sub-main grid.
Optionally, in the solar cell grid line structure, the width of the third sub-main grid is gradually narrowed from the connection position of the third sub-main grid and the welding point to the direction away from the welding point.
Optionally, in the solar cell grid line structure, the shape of the welding spot is any one of a rectangle, a circle, an ellipse and a square.
The application also provides a solar cell, which comprises the solar cell grid line structure in any one of the above manners.
The application also provides a photovoltaic module, which comprises the solar cell.
The solar cell grid line structure comprises a plurality of main grids, a plurality of auxiliary grids and a plurality of welding points, wherein the main grids and the auxiliary grids are vertically distributed in a crossed manner; the main grid comprises a first sub-main grid and a second sub-main grid, welding points are distributed on the first sub-main grid, and the width of the first sub-main grid is larger than that of the second sub-main grid.
It is thus clear that, including many main grids in the solar cell grid line structure of this application, many vice bars, a plurality of solder joints, the main grid includes first sub-main grid and the sub-main grid of second, the solder joint distributes on first sub-main grid, the width of first sub-main grid is greater than the width of the sub-main grid of second, the main grid width of solder joint both sides is greater than the width of the main grid of keeping away from the solder joint promptly, the main grid width of solder joint both sides increases, thereby increase and weld the area of contact in area, increase weldable region, promote welded reliability.
The application also provides a solar cell and a photovoltaic module.
Drawings
For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a conventional solar cell grid line structure;
FIG. 2 is an enlarged view of a portion of the dashed line box A of FIG. 1;
FIG. 3 is an enlarged view of a portion of the dashed box B in FIG. 1;
FIG. 4 is a schematic view of an MBB solar cell during soldering;
fig. 5 is a schematic view of a solar cell grid line structure according to an embodiment of the present disclosure;
fig. 6 is an enlarged schematic view of a dotted line frame C portion of a solar cell grid line structure according to an embodiment of the present disclosure;
fig. 7 is an enlarged schematic view of a dotted line frame D portion of a solar cell grid line structure according to an embodiment of the present disclosure;
fig. 8 is another enlarged schematic view of a dashed-line frame C portion of a gate line structure of a solar cell according to an embodiment of the present disclosure;
fig. 9 is another enlarged schematic view of a dashed-line frame D portion of a gate line structure of a solar cell according to an embodiment of the present disclosure;
fig. 10 is another enlarged schematic view of a dotted frame C portion of a solar cell grid line structure according to an embodiment of the present disclosure.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As described in the background section, in order to consider the manufacturing cost and quality of the solar cell, the solder joints cannot be widened and lengthened without limitation, and are limited by the size of the solder joints, and the solderable areas of the MBB solar cell are very small, so that once the solder ribbons and the solder joints are not effectively bonded, cold solder is easily caused, thereby reducing the current collection and transmission of the whole solar cell.
In view of the above, the present application provides a solar cell grid line structure, please refer to fig. 5 to 7, fig. 5 is a schematic view of a solar cell grid line structure provided in an embodiment of the present application, fig. 6 and 7 are partial enlarged views of dotted line frames C and D in fig. 5, the solar cell grid line structure includes a plurality of main grids 5, a plurality of sub-grids 6, and a plurality of solder joints 2, wherein the plurality of main grids 5 and the plurality of sub-grids 6 are vertically distributed in a crossing manner;
the main grid 5 comprises a first sub-main grid 51 and a second sub-main grid 52, welding points 2 are distributed on the first sub-main grid 51, and the width of the first sub-main grid 51 is larger than that of the second sub-main grid 52.
The shape of the welding spot 2 includes, but is not limited to, any one of rectangle, circle, ellipse and square.
It should be noted that the width of the second sub-main gates 52 is equal, the width may be in the range of 0.05mm to 0.15mm, the width of the first sub-main gates 51 may be equal, and the width of the first sub-main gates 51 is greater than the width of the second sub-main gates 52.
Preferably, the width of the first sub-main gate 51 is gradually narrowed from the connection between the first sub-main gate 51 and the solder 2 to the connection between the first sub-main gate 51 and the second sub-main gate 52, please refer to fig. 8 and 9, that is, the width of the first sub-main gate 51 is gradually changed, and gradually narrowed from the connection with the solder 2 to a position away from the solder 2, which is advantageous in reducing the amount of main gate paste and reducing the manufacturing cost.
Optionally, the width of the joint of the first sub-main gate 51 and the solder joint 2 is 0.3mm, and the width of the joint of the first sub-main gate 51 and the second sub-main gate 52 is 0.1mm, that is, the width of the first sub-main gate 51 gradually narrows from the joint of the first sub-main gate 51 and the solder joint 2 to a position away from the solder joint 2 from 0.3mm to 0.1 mm. Of course, the width of the first sub-main grid 51 may also be gradually changed by other widths, and the width may be freely adjusted according to the width of the solder strip, which is not specifically limited in this application.
The utility model provides a solar cell grid line structure includes many main bars 5, many vice bars 6, a plurality of solder joints 2, main bar 5 includes first sub-main bar 51 and the sub-main bar 52 of second, solder joint 2 distributes on first sub-main bar 51, the width of first sub-main bar 51 is greater than the width of the sub-main bar 52 of second, the main bar 5 width of 2 both sides of solder joint is greater than the width of the main bar 5 of keeping away from solder joint 2 promptly, the main bar 5 width of 2 both sides of solder joint increases, thereby increase and weld the area of contact in area, increase and weld the region, promote welded reliability.
In an embodiment of the present application, referring to fig. 10, the solar cell grid line structure further includes:
and the third sub-main grid 53 is connected with the welding point 2 at the end part of the main grid 5, and the width of the connection part of the third sub-main grid 53 and the welding point 2 is greater than that of the second sub-main grid 52.
The third sub-main grid 53 is positioned in a concave shape formed at the end part of the main grid 5, the contact area between the welding spot 2 positioned at the end part of the main grid 5 and a welding strip on the outer side is increased, the weldable area is increased, the reliability of the welding spot 2 positioned at the end part of the main grid 5 is increased, and the overall welding reliability of the grid line structure of the solar cell is further improved.
Preferably, the width of the third sub-main gate 53 is gradually narrowed from the connection position of the third sub-main gate 53 and the welding point 2 to the direction away from the welding point 2, that is, the width of the third sub-main gate 53 is gradually narrowed from the connection position with the welding point 2 to the position away from the welding point 2, which has the advantages of reducing the consumption of main gate paste and reducing the manufacturing cost.
Optionally, the width of the joint of the third sub-main gate 53 and the welding point 2 is 0.3mm, and the width of the end of the third sub-main gate 53 away from the welding point 2 is 0.1mm, that is, the width of the third sub-main gate 53 gradually narrows from the joint with the welding point 2 to a position away from the welding point 2 from 0.3mm to 0.1 mm. Of course, the width of the third sub-main gate 53 may also be gradually changed by other widths, and the third sub-main gate may be freely adjusted according to the width of the solder strip, which is not specifically limited in this application.
The application also provides a solar cell, the solar cell includes any one of the above-mentioned embodiments the solar cell grid line structure, wherein the solar cell grid line structure includes many main grids 5, many auxiliary grids 6, a plurality of solder joints 2, main grid 5 includes first sub-main grid 51 and second sub-main grid 52, solder joint 2 distributes on first sub-main grid 51, the width of first sub-main grid 51 is greater than the width of second sub-main grid 52, i.e. the width of main grid 5 on 2 both sides of solder joint is greater than the width of main grid 5 far away from solder joint 2, the width of main grid 5 on 2 both sides of solder joint increases, thereby increase with the area of contact of solder strip, increase the weldable area, promote the reliability of welding, thereby promote solar cell's yield, promote solar cell's quality.
The application also provides a photovoltaic module, which comprises the solar cell in the embodiment.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The solar cell, the grid line structure thereof and the photovoltaic module provided by the application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (8)
1. A solar cell grid line structure is characterized by comprising a plurality of main grids, a plurality of auxiliary grids and a plurality of welding points, wherein the main grids and the auxiliary grids are vertically distributed in a crossed manner;
the main grid comprises a first sub-main grid and a second sub-main grid, welding points are distributed on the first sub-main grid, and the width of the first sub-main grid is larger than that of the second sub-main grid.
2. The solar cell grid line structure of claim 1, wherein the width of the first sub-main grid is gradually narrowed from the connection of the first sub-main grid and the solder joint to the connection of the first sub-main grid and the second sub-main grid.
3. The solar cell grid line structure of claim 2, wherein the width of the junction of the first sub-main grid and the solder joint is 0.3mm, and the width of the junction of the first sub-main grid and the second sub-main grid is 0.1 mm.
4. A solar cell grid line structure as claimed in any one of claims 1 to 3, further comprising:
and the width of the joint of the third sub-main grid and the welding point is greater than that of the second sub-main grid.
5. The solar cell grid line structure of claim 4, wherein the width of the third sub-main grid is gradually narrowed from the connection of the third sub-main grid and the solder joint to a direction away from the solder joint.
6. The solar cell grid line structure of claim 4, wherein the solder joint has a shape of any one of a rectangle, a circle, an oval, and a square.
7. A solar cell comprising the solar cell grid line structure of any of claims 1-6.
8. A photovoltaic module comprising the solar cell of claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022743887.7U CN213459753U (en) | 2020-11-24 | 2020-11-24 | Solar cell, grid line structure thereof and photovoltaic module |
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| CN202022743887.7U CN213459753U (en) | 2020-11-24 | 2020-11-24 | Solar cell, grid line structure thereof and photovoltaic module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113725307A (en) * | 2021-08-27 | 2021-11-30 | 上海晶科绿能企业管理有限公司 | Photovoltaic cell, cell assembly and preparation process |
| CN115188840A (en) * | 2022-09-07 | 2022-10-14 | 浙江晶科能源有限公司 | Photovoltaic cell and photovoltaic module |
| JP2023067779A (en) * | 2021-10-29 | 2023-05-16 | 晶科能源股分有限公司 | Electrode structure, solar battery, and photovoltaic power generation module |
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2020
- 2020-11-24 CN CN202022743887.7U patent/CN213459753U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113725307A (en) * | 2021-08-27 | 2021-11-30 | 上海晶科绿能企业管理有限公司 | Photovoltaic cell, cell assembly and preparation process |
| US11764313B2 (en) | 2021-08-27 | 2023-09-19 | Shanghai Jinko Green Energy Enterprise Management Co., Ltd. | Photovoltaic solar cell, solar cell module and manufacturing process |
| CN113725307B (en) * | 2021-08-27 | 2024-02-06 | 上海晶科绿能企业管理有限公司 | Photovoltaic cell, cell assembly and preparation process |
| JP2023067779A (en) * | 2021-10-29 | 2023-05-16 | 晶科能源股分有限公司 | Electrode structure, solar battery, and photovoltaic power generation module |
| JP7349545B2 (en) | 2021-10-29 | 2023-09-22 | 晶科能源股分有限公司 | Electrode structures, solar cells and photovoltaic modules |
| CN115188840A (en) * | 2022-09-07 | 2022-10-14 | 浙江晶科能源有限公司 | Photovoltaic cell and photovoltaic module |
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