CN219246692U - Main grid plate and battery piece manufactured by adopting same - Google Patents
Main grid plate and battery piece manufactured by adopting same Download PDFInfo
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- CN219246692U CN219246692U CN202320612694.9U CN202320612694U CN219246692U CN 219246692 U CN219246692 U CN 219246692U CN 202320612694 U CN202320612694 U CN 202320612694U CN 219246692 U CN219246692 U CN 219246692U
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- 239000000758 substrate Substances 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 12
- 238000007650 screen-printing Methods 0.000 claims description 7
- 238000007639 printing Methods 0.000 abstract description 18
- 238000001035 drying Methods 0.000 description 6
- 230000008719 thickening Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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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 utility model provides a main grid mesh plate and a battery piece manufactured by adopting the main grid mesh plate, wherein the mesh plate comprises a frame, a gauze layer is arranged in the frame, a PI film layer is arranged on the lower surface of the gauze layer, the PI film layer consists of a common film thickness area and a thickened film thickness area, and the thickened film thickness area is positioned at the position of the edge of the mesh plate; the PI film layer corresponding area is provided with a plurality of through holes for the printing ink to pass through; the PI film thickness of the thickened film thickness region is 2-8 mu m thicker than the PI film thickness of the common film thickness region. According to the utility model, the edge position of the PI film layer of the main grid plate is thickened, so that the height of the PAD point at the edge of the main grid layer of the battery piece is larger than that of the PAD point at the middle position under the same printing condition, the problem that the edge tension of the battery piece is low is effectively solved, and the battery piece is not easy to fall off after being welded with other structures through the main grid.
Description
Technical Field
The utility model belongs to the technical field of solar cell main grid plates, and particularly relates to a main grid plate and a cell manufactured by using the same.
Background
With the wide application of solar energy, the solar photovoltaic panel industry is also vigorously developed, and the effect improvement and cost reduction are the main research and development directions in the industry at present; in terms of cost reduction, more than 50% of the component cost comes from the battery, and the non-silicon cost of the battery is mainly limited by the cost of silver paste; at present, mainstream enterprises develop to a plurality of main grids, but as the main grids become more and thinner, the tension problem also occurs. In order to prevent the battery piece from falling off due to insufficient welding tension, the whole tension of the battery piece is required to be qualified, the tension of the printing edge (corresponding to the welding starting point and the end point) of the battery piece is larger than the middle tension, but the tension of the printing screen plate is always larger under the condition that the middle of the printing screen plate is the same as that of the edge structure, so that the thickness of an edge welding Point (PAD) in a main grid layer of the battery piece at a printing position is thinner than that of the middle position, the battery piece is welded with other structures through the main grid (the welding position is also called as the PAD point), and the tension of the edge welding point of the battery piece after the battery piece is welded with the other structures is smaller than that of the middle welding point of the battery piece.
Disclosure of Invention
The utility model mainly solves the technical problems of providing a main grid screen plate and a battery piece manufactured by the main grid screen plate, and thickening the edge position of a PI film layer of the main grid screen plate, so that the height of an edge PAD point of the main grid layer of the battery piece is larger than that of a PAD point at the middle position under the same printing condition, and the problem of lower tension of the edge of the battery piece is effectively solved, and the battery piece is not easy to fall off after being welded with other structures through the main grid.
In order to solve the technical problems, the utility model provides a main grid screen plate, which comprises a frame, wherein a gauze layer is arranged in the frame, a PI film layer is arranged on the lower surface of the gauze layer, the PI film layer consists of a common film thickness area and a thickened film thickness area, and the thickened film thickness area is positioned at the position of the edge of the screen plate;
the PI film layer corresponding area is provided with a plurality of through holes for the ink to pass through;
the PI film thickness of the common film thickness area is 4-15 mu m; the PI film thickness of the thickened film thickness area is 6-20 mu m; and the PI film thickness of the thickened film thickness area is 2-8 mu m thicker than that of the common film thickness area.
Further, the thickness of the gauze layer is 15-18 μm.
Further, the thickness of the gauze layer is 18 μm; the PI film thickness of the common film thickness area is 15 mu m; the PI film thickness of the thickened film thickness region was 19 μm.
The utility model also provides a battery piece manufactured by adopting the main grid plate, the battery piece comprises a substrate, an auxiliary grid layer and a main grid layer, the auxiliary grid layer is printed on the surface of the substrate through the auxiliary grid screen printing plate, and the main grid layer is printed on the surface of the substrate through the main grid screen printing plate.
Further, the height of the welding spot at the edge of the main gate layer is larger than the height of the welding spot at the middle position of the main gate layer.
Further, the front and back surfaces of the substrate are both provided with the auxiliary gate layer and the main gate layer.
The utility model has the beneficial effects that:
the utility model comprises a frame, wherein a gauze layer is arranged in the frame, the lower surface of the gauze layer is provided with a PI film layer, the PI film layer consists of a common film thickness area and a film thickness thickening area, and the film thickness thickening area is positioned at the position close to the edge of the screen; the PI film layer corresponding area is provided with a plurality of through holes for the printing ink to pass through; the PI film thickness of the thickened film thickness area is thicker than that of the PI film thickness of the common film thickness area, and the edge position of the PI film layer of the main grid plate is thickened, so that the height of the edge PAD point of the main grid layer of the battery piece is larger than that of the PAD point at the middle position under the same printing condition, and the problem that the edge tension of the battery piece is lower is effectively solved, and the battery piece is not easy to fall off after being welded with other structures through the main grid.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.
Drawings
FIG. 1 is a top view of a primary gate screen of the present utility model;
FIG. 2 is a side cross-sectional view of a main gate panel of the present utility model;
FIG. 3 is a side cross-sectional view of a battery plate of the present utility model;
the various designations in the drawings are as follows:
the frame 10, the PI film layer 20, the common film thickness area 201, the thickened film thickness area 202, the through holes 203, the gauze layer 30, the substrate 100, the auxiliary gate layer 101, the main gate layer 102, welding points 1021 at the edges of the main gate layer and welding points 1022 at the middle position of the main gate layer.
Detailed Description
The following specific embodiments of the utility model are described in order to provide those skilled in the art with an understanding of the present disclosure. The utility model may be embodied in other different forms, i.e., modified and changed without departing from the scope of the utility model.
Example 1: as shown in fig. 1 and 2, the main grid screen plate comprises a frame 10, wherein a gauze layer 30 is arranged in the frame, a PI film layer 20 is arranged on the lower surface of the gauze layer, the PI film layer consists of a common film thickness area 201 and a thickened film thickness area 202, and the thickened film thickness area is positioned at the position of the edge of the screen plate;
the PI film layer corresponding area is provided with a plurality of through holes 203 for the ink to pass through;
the PI film thickness of the common film thickness area is 4-15 mu m; the PI film thickness of the thickened film thickness area is 6-20 mu m; and the PI film thickness of the thickened film thickness area is 2-8 mu m thicker than that of the common film thickness area.
The thickness of the gauze layer is 15-18 mu m.
Preferably, the thickness of the gauze layer is 18 μm; the PI film thickness of the common film thickness area is 15 mu m; the PI film thickness of the thickened film thickness region was 19 μm.
The shape and size of the through hole are set according to the requirement, and in this embodiment, the shape of the through hole is rectangular.
Since the ink passes through the mesh of the gauze layer and the through holes of the PI film layer and is accumulated in the through holes, and is then printed on the battery substrate by external pressure, the depth of the through holes is deeper at the position of the PI film layer thickness, and the accumulated ink angle, so the thickness of the printed main grid (or PAD point) is thicker, and similarly, the thickness of the printed main grid (or PAD point) is thinner at the position of the thin PI film layer.
Example 2: as shown in fig. 3, the battery piece manufactured by the main grid plate comprises a substrate 100, an auxiliary grid layer 101 and a main grid layer 102, wherein the auxiliary grid layer is printed on the surface of the substrate through an auxiliary grid screen printing plate, and the main grid layer is printed on the surface of the substrate through the main grid screen printing plate.
The height of the solder joints 1021 at the edges of the main gate layer is greater than the height of the solder joints 1022 at intermediate positions of the main gate layer.
The front and back surfaces of the substrate are both provided with the auxiliary grid layer and the main grid layer.
In this embodiment, the sub gate layer is a grid network formed by intersecting a plurality of gate lines; the main gate layer refers to a plurality of individual rectangular blocks, which we also refer to as PAD points.
The preparation method of the battery piece comprises the following steps:
when the main grid layer on the front side and the back side is printed, the main grid screen printing screen in the embodiment 1 is used for printing, the screen comprises a screen gauze layer and a PI film layer, the PI film layer consists of a common film thickness area and a thickened film thickness area, the thickened film thickness area is positioned at the position of the edge of the screen, and the PI film thickness of the thickened film thickness area is larger than that of the common film thickness area;
step S1, manufacturing a main grid plate: as shown in fig. 2, a gauze layer and a PI film layer are sequentially arranged from top to bottom, wherein the thickness of the gauze layer 310 is 18 μm; the PI film thickness of the common film thickness area is 15 mu m; the PI film thickness of the thickened film thickness area is 19 mu m;
as shown in fig. 1, the area of the thickened film thickness area covers the main grid of the printing edge;
step S2, printing a back auxiliary grid layer on the back of the battery piece substrate 100, and drying in a drying furnace;
step S3, printing a main grid layer on the back surface of the battery piece substrate 100 by using the main grid plate manufactured in the step S1, wherein the printed edge PI film is thicker, and under the same printing condition, the main grid (also called as a plurality of independent PAD points or blocks) at the edge of the battery piece is thicker than the main grid in the middle of the battery piece, so that the edge tension of the battery piece is improved, and the battery piece is dried in a drying furnace;
s4, turning over the battery piece, printing an auxiliary grid layer on the front surface of the battery piece substrate, and drying in a drying furnace;
and S5, printing a main grid layer on the front surface of the battery plate substrate by using the main grid screen manufactured in the step S1, wherein the PI film at the printing edge is thicker, and under the same printing condition, the main grid (also called as a plurality of independent PAD points or blocks) at the edge of the battery plate is thicker than the main grid at the middle of the battery plate, so that the edge tension of the battery plate is improved, and the battery plate is dried in a drying furnace.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures made by the description of the utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the utility model.
Claims (6)
1. A main grid panel, characterized by: the screen plate comprises a frame, a gauze layer is arranged in the frame, a PI film layer is arranged on the lower surface of the gauze layer, the PI film layer consists of a common film thickness area and a thickened film thickness area, and the thickened film thickness area is positioned at the position close to the edge of the screen plate;
the PI film layer corresponding area is provided with a plurality of through holes for the ink to pass through;
the PI film thickness of the common film thickness area is 4-15 mu m; the PI film thickness of the thickened film thickness area is 6-20 mu m; and the PI film thickness of the thickened film thickness area is 2-8 mu m thicker than that of the common film thickness area.
2. The master gate screen of claim 1, wherein: the thickness of the gauze layer is 15-18 mu m.
3. The master gate screen of claim 1, wherein: the thickness of the gauze layer is 18 μm; the PI film thickness of the common film thickness area is 15 mu m; the PI film thickness of the thickened film thickness region was 19 μm.
4. A battery cell made using the master gate sheet of claim 1, wherein: the battery piece comprises a substrate, an auxiliary grid layer and a main grid layer, wherein the auxiliary grid layer is printed on the surface of the substrate through an auxiliary grid screen printing plate, and the main grid layer is printed on the surface of the substrate through a main grid screen printing plate.
5. The battery cell according to claim 4, wherein: the height of the welding spot at the edge of the main gate layer is larger than that of the welding spot at the middle position of the main gate layer.
6. The battery cell according to claim 4, wherein: the front and back surfaces of the substrate are both provided with the auxiliary grid layer and the main grid layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320612694.9U CN219246692U (en) | 2023-03-27 | 2023-03-27 | Main grid plate and battery piece manufactured by adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320612694.9U CN219246692U (en) | 2023-03-27 | 2023-03-27 | Main grid plate and battery piece manufactured by adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219246692U true CN219246692U (en) | 2023-06-23 |
Family
ID=86849926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320612694.9U Active CN219246692U (en) | 2023-03-27 | 2023-03-27 | Main grid plate and battery piece manufactured by adopting same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219246692U (en) |
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2023
- 2023-03-27 CN CN202320612694.9U patent/CN219246692U/en active Active
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