CN215397597U - Printing stencil for solar cell - Google Patents
Printing stencil for solar cell Download PDFInfo
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- CN215397597U CN215397597U CN202022879310.9U CN202022879310U CN215397597U CN 215397597 U CN215397597 U CN 215397597U CN 202022879310 U CN202022879310 U CN 202022879310U CN 215397597 U CN215397597 U CN 215397597U
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- grid
- mesh
- solar cell
- mesh cloth
- cloth
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- 239000004744 fabric Substances 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 5
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000005323 electroforming Methods 0.000 claims 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 229910052709 silver Inorganic materials 0.000 abstract description 8
- 239000004332 silver Substances 0.000 abstract description 8
- 238000010147 laser engraving Methods 0.000 abstract description 4
- 238000010329 laser etching Methods 0.000 abstract description 4
- 230000035515 penetration Effects 0.000 abstract description 4
- 239000010408 film Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- Printing Plates And Materials Therefor (AREA)
Abstract
The utility model discloses a printing stencil for a solar cell, which comprises a first mesh and a second mesh which are sequentially arranged, wherein a mesh frame is arranged on the periphery of the second mesh; the first mesh cloth comprises a first mesh area and a plurality of second mesh areas; the second grid areas are uniformly distributed in the first mesh cloth, and the number of the grid meshes of the second grid areas is less than or equal to that of the first grid areas; the first mesh cloth is provided with a membrane material, and a main grid and an auxiliary grid which are mutually crossed; the main grid is formed by connecting fine lines in series with bonding pads, and the second grid area is located at the position of the bonding pads. According to the printing stencil for the solar cell, the screen gauze at the main grid pad position is selectively removed by adopting a laser engraving or etching process, so that different mesh numbers of the first grid area and the second grid area are realized, the ink penetration amount at the main grid pad position is increased, the height of printing silver paste is increased, the flatness is improved, and meanwhile, the printing of the auxiliary grid is not influenced.
Description
Technical Field
The utility model relates to the technical field of printing screens, in particular to a printing stencil for a solar cell.
Background
In the traditional solar cell, the number of the main grids is generally 4-6, and the width of the main grids is designed to be 0.5-1 mm. In order to further reduce the light shielding area of the surface of the solar cell and the consumption of the main grid silver paste, MBB cell design is rapidly applied and increased in the market in recent years, and the market proportion is over 50% in 2020. The MBB battery has 9-15 main grids, the main grids are designed by connecting thin wires in series with 10-18 bonding pads, the width of the thin wires is designed to be 0.04-0.08mm, and the bonding pads are designed to be rectangles or other polygons in the range of 0.6-1.4 mm.
The MBB cell main grid is designed into a fine line and a bonding pad. When the assembly is packaged, the round welding rod is welded on the welding disc of the main grid to form current conduction between the battery pieces. However, the adoption of the round welding rod can cause the welding tension to be lower or cause insufficient welding, and the welding rod is easy to fall off. Therefore, the silver paste at the position of the bonding pad is high in height and small in fluctuation. The traditional method is to reduce the mesh number and the wire diameter of the screen cloth of the printing stencil, improve the yarn thickness and the film thickness of the screen cloth, thus improving the height of the silver paste at the position of the main grid pad and reducing the undulation degree. But the influence on the auxiliary grid lines on the same template is large, the printing performance of the auxiliary grid lines is reduced, the printing width is increased, and the unit consumption of silver paste is increased and the overall conversion efficiency is reduced. If the primary grid and the secondary grid are printed separately, this can increase equipment costs, administrative costs, and stencil costs.
Based on the above situation, the present invention provides a printing stencil for a solar cell, which can effectively solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a printing stencil for a solar cell. The printing stencil for the solar cell is simple in structure and convenient to use, and different mesh numbers of the first grid area and the second grid area are realized by selectively removing the gauze at the position of the main grid pad by adopting a laser engraving or etching process, so that the mesh number at the position of the main grid pad is reduced in the printing process, the ink penetration amount is increased, the height of printed silver paste is increased, the smoothness is improved, and meanwhile, the printing of the auxiliary grid is not influenced.
The utility model is realized by the following technical scheme:
a printing stencil for a solar cell comprises a first mesh and a second mesh which are arranged in sequence, wherein a mesh frame is arranged on the periphery of the second mesh;
the first mesh cloth comprises a first mesh area and a plurality of second mesh areas; the second grid areas are uniformly distributed in the first mesh cloth, and the number of the grid meshes of the second grid areas is less than or equal to that of the first grid areas;
the first mesh cloth is provided with a membrane material, and a main grid and an auxiliary grid which are mutually crossed; the main grid is formed by connecting fine lines in series with bonding pads, and the second grid area is located at the position of the bonding pads.
The utility model aims to provide a printing stencil for a solar cell. The printing stencil for the solar cell is simple in structure and convenient to use, and different mesh numbers of the first grid area and the second grid area are realized by selectively removing the gauze at the position of the main grid pad by adopting a laser engraving or etching process, so that the mesh number at the position of the main grid pad is reduced in the printing process, the ink penetration amount is increased, the height of printed silver paste is increased, the smoothness is improved, and meanwhile, the printing of the auxiliary grid is not influenced.
Preferably, the first mesh cloth and the second mesh cloth are both one of polyester mesh cloth, nylon mesh cloth, stainless steel mesh cloth or electroformed gauze.
Preferably, the pad is rectangular or polygonal in shape.
Preferably, the included angles between the first mesh cloth and the horizontal position and the included angles between the second mesh cloth and the horizontal position are both 0-180 degrees.
Preferably, the film material is one of a photosensitive emulsion, a photosensitive film or a non-photosensitive thin film.
Preferably, the grid lines in the main grid are crossed in a vertical or any angle.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
the printing stencil for the solar cell is simple in structure and convenient to use, and different mesh numbers of the first grid area and the second grid area are realized by selectively removing the gauze at the position of the main grid pad by adopting a laser engraving or etching process, so that the mesh number at the position of the main grid pad is reduced in the printing process, the ink penetration amount is increased, the height of printed silver paste is increased, the smoothness is improved, and meanwhile, the printing of the auxiliary grid is not influenced. The printing stencil is designed, the printing stencil is not influenced by the specification and parameters of the gauze of the secondary grid line printing design, the height and the smoothness of the printing pad slurry can be automatically adjusted and designed, and the reliability of the battery is greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a structure in which grid lines in a main grid are vertically crossed according to the present invention;
FIG. 3 is a schematic structural diagram of grid lines in the main grid crossing at any angle according to the present invention;
FIG. 4 is a schematic structural view of the bonding pad of the present invention after all grid lines in a single direction are removed;
fig. 5 is a schematic structural diagram of the pad after grid lines in two directions are removed at intervals.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1 to 5, the present invention provides a printing stencil for a solar cell, including a first mesh cloth 1 and a second mesh cloth 2 sequentially disposed, wherein a mesh frame 3 is disposed around the second mesh cloth; the first mesh cloth 1 and the second mesh cloth 2 are compounded, and the compounded mesh cloth is stretched to a certain tension on a net stretching device and then is bonded on the net frame 3.
The first mesh cloth 1 comprises a first mesh area 11 and a plurality of second mesh areas 12; the second grid areas 12 are uniformly distributed in the first mesh cloth 1, and the mesh number of the second grid areas 12 is less than or equal to that of the first grid areas 11;
the first mesh cloth 1 is provided with a membrane material, and a main grid 13 and an auxiliary grid 14 which are mutually crossed; the main grid 13 is formed by connecting fine wires 131 in series with pads 132, and the second grid region 12 is located where the pads 132 are located.
Example 2:
as shown in fig. 1 to 5, the present invention provides a printing stencil for a solar cell, including a first mesh cloth 1 and a second mesh cloth 2 sequentially disposed, wherein a mesh frame 3 is disposed around the second mesh cloth; the first mesh cloth 1 and the second mesh cloth 2 are compounded, and the compounded mesh cloth is stretched to a certain tension on a net stretching device and then is bonded on the net frame 3.
The first mesh cloth 1 comprises a first mesh area 11 and a plurality of second mesh areas 12; the second grid areas 12 are uniformly distributed in the first mesh cloth 1, and the mesh number of the second grid areas 12 is less than or equal to that of the first grid areas 11;
the first mesh cloth 1 is provided with a membrane material, and a main grid 13 and an auxiliary grid 14 which are mutually crossed; the main grid 13 is formed by connecting fine wires 131 in series with pads 132, and the second grid region 12 is located where the pads 132 are located.
Further, in another embodiment, the first mesh cloth 1 and the second mesh cloth 2 are both one of polyester mesh cloth, nylon mesh cloth, stainless steel mesh cloth, or electroformed mesh cloth.
Further, in another embodiment, the pad 132 is rectangular or polygonal in shape.
Further, in another embodiment, the included angles between the first mesh cloth 1 and the second mesh cloth 2 and the horizontal position are both 0-180 °.
Further, in another embodiment, the film material is one of a photosensitive emulsion, a photosensitive film or a non-photosensitive film.
Further, in another embodiment, the grid lines in the main grid 13 intersect at a vertical angle or at any angle.
According to the description of the utility model and the drawings, a person skilled in the art can easily make or use the printing stencil for solar cells of the utility model and can bring about the positive effects described in the utility model.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally 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.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (6)
1. A printing stencil for a solar cell, comprising: the net comprises a first net cloth (1) and a second net cloth (2) which are arranged in sequence, wherein a net frame (3) is arranged on the periphery of the second net cloth;
the first mesh cloth (1) comprises a first mesh area (11) and a plurality of second mesh areas (12); the second grid areas (12) are uniformly distributed in the first mesh (1), and the number of the grid meshes of the second grid areas (12) is less than or equal to that of the first grid areas (11);
the first mesh cloth (1) is provided with a membrane material, a main grid (13) and an auxiliary grid (14) which are mutually crossed; the main grid (13) is formed by connecting fine lines (131) with pads (132) in series, and the second grid region (12) is located at the position of the pads (132).
2. The printing stencil for a solar cell of claim 1, wherein: the first mesh cloth (1) and the second mesh cloth (2) are both one of polyester mesh cloth, nylon mesh cloth, stainless steel wire mesh cloth or electroforming mesh yarn.
3. The printing stencil for a solar cell of claim 1, wherein: the pad (132) is rectangular or polygonal in shape.
4. The printing stencil for a solar cell of claim 1, wherein: the included angle between the first mesh cloth (1) and the horizontal position and the included angle between the second mesh cloth (2) and the horizontal position are both 0-180 degrees.
5. The printing stencil for a solar cell of claim 1, wherein: the film material is one of photosensitive emulsion, photosensitive film or non-photosensitive film.
6. The printing stencil for a solar cell of claim 1, wherein: grid lines in the main grid (13) are vertical or crossed at any angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022879310.9U CN215397597U (en) | 2020-12-03 | 2020-12-03 | Printing stencil for solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022879310.9U CN215397597U (en) | 2020-12-03 | 2020-12-03 | Printing stencil for solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215397597U true CN215397597U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022879310.9U Active CN215397597U (en) | 2020-12-03 | 2020-12-03 | Printing stencil for solar cell |
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| Country | Link |
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| CN (1) | CN215397597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721417A (en) * | 2020-12-03 | 2021-04-30 | 浙江硕克科技有限公司 | Printing stencil for solar cell and manufacturing process thereof |
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2020
- 2020-12-03 CN CN202022879310.9U patent/CN215397597U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721417A (en) * | 2020-12-03 | 2021-04-30 | 浙江硕克科技有限公司 | Printing stencil for solar cell and manufacturing process thereof |
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Address after: Room 529, 11 standard workshops, plot a-02, phase II Industrial Zone, Tongxiang Economic Development Zone, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Shuoke Technology Co.,Ltd. Country or region after: China Address before: Room 529, 11 standard workshops, plot a-02, phase II Industrial Zone, Tongxiang Economic Development Zone, Jiaxing City, Zhejiang Province Patentee before: ZHEJIANG SHUOKE SCIENCE & TECHNOLOGY Co.,Ltd. Country or region before: China |