Screen printing plate, solar cell and photovoltaic module
By setting structural walls and stress-dispersing walls around the perforated sidewalls of the printing screen, the problem of damage caused by stress concentration in the printing screen is solved, resulting in a longer service life and higher printing quality.
Patent Information
- Application Number
- CN202423294536.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-28
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-28
AI Technical Summary
Existing printing screens are prone to damage during printing due to stress concentration, which affects print quality.
Structural walls and stress-dispersing walls are set around the perforated sidewalls of the printing screen to disperse the forces of the doctor blade and the paste, thus avoiding stress concentration.
It improves the service life of printing screens, ensures the shape of printing holes, enhances ink application performance and preparation yield, and ensures printing quality.
Smart Images
Figure CN223533183U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solar energy technology, and in particular to a printing screen, a solar cell and a photovoltaic module. Background Technology
[0002] Screen printing is a crucial tool for printing the electrodes of solar cells. A printing paste is poured onto the screen, and a squeegee moves the paste across the screen, forcing it through the perforations and onto the solar cell to form a pattern, thus creating the electrodes. During printing, the squeegee needs to apply a certain force to allow the paste to pass through the perforations. Existing screens are prone to stress concentration under this force, making them susceptible to damage and affecting print quality. Summary of the Invention
[0003] Therefore, it is necessary to provide a new printing screen, solar cell, and photovoltaic module to solve the above-mentioned technical problems.
[0004] One technical solution of this utility model is: a printing screen, which includes a carrier and a printing hole through the carrier. The printing hole includes a hole sidewall provided on the thickness of the carrier and a cavity formed by the hole sidewall. The hole sidewall includes a structural wall and a stress dispersion wall along the periphery of the hole.
[0005] In one embodiment, the stress-dispersing wall is in the form of an arc and / or a continuous multi-segment structure.
[0006] In one embodiment, the stress-dispersing wall is in the form of an arc, with an arc angle ranging from 45° to 180°.
[0007] In one embodiment, the stress-dispersing wall is an arc-shaped end between two parallel structural walls, or the stress-dispersing wall is an arc-shaped chamfer between two mutually perpendicular structural walls.
[0008] In one embodiment, the stress-dispersing wall is a continuous multi-segment structure, comprising at least two smoothly connected arc segments, or comprising at least three consecutive straight segments with an angle greater than 90° between adjacent straight segments.
[0009] In one embodiment, the carrier includes a first base layer and a second base layer stacked together. The printing hole includes a first opening penetrating the first base layer and a second opening penetrating the second base layer and corresponding to the first opening. The diameter of the first opening is smaller than the diameter of the second opening.
[0010] In one embodiment, the structural wall and stress-dispersing wall of the first opening are configured the same as or different from the structural wall and stress-dispersing wall of the second opening.
[0011] In one embodiment, the printing screen is a fine grid screen, the printing holes are fine grid lines, the fine grid lines extend along a first direction, and a plurality of the fine grid lines are spaced apart along the first direction and spaced apart along a second direction.
[0012] In one embodiment, the printing screen is a main grid screen, the printing holes include main grid seams, the main grid seams extend along a second direction, a plurality of the main grid seams are spaced apart along a first direction, and the main grid seams include a main line extending along the second direction, a harpoon portion located at one end of the main line, and pad portions spaced apart from the main line.
[0013] In one embodiment, the printed hole further includes a main grid gap, which extends along a first direction, and a plurality of main grid gaps are arranged along a second direction to form a connecting group. The main grid gap is in the shape of a tube bone or a waist-shaped hole.
[0014] In one embodiment, the printed holes include a plurality of fine grid seams and a plurality of main grid seams arranged in a row.
[0015] This utility model also discloses a solar cell, which includes a semiconductor substrate and an electrode structure disposed on the semiconductor substrate and printed by a printing screen as described above.
[0016] This utility model also discloses a photovoltaic module, which includes a plurality of solar cells as described above and solder strips connecting the plurality of solar cells.
[0017] The beneficial effects of this invention are as follows: The sidewall of the hole includes a structural wall and a stress-dispersing wall along the periphery of the hole. During screen printing, the stress-dispersing wall can disperse the force exerted by the doctor blade and ink on the printing hole, avoiding stress concentration that could damage the printing hole, thereby ensuring the hole shape, improving the service life of the screen printing plate, improving ink application performance, increasing the yield rate, and ensuring printing quality. Attached Figure Description
[0018] Figure 1 This is a schematic diagram showing the distribution of printing holes in the printing screen of this utility model;
[0019] Figure 2 for Figure 1 Enlarged view of center circle A;
[0020] Figure 3 for Figure 2 Another enlarged schematic diagram;
[0021] Figure 4 for Figure 2 Another enlarged schematic diagram;
[0022] Figure 5 for Figure 2 Another enlarged schematic diagram;
[0023] Figure 6 This is a schematic diagram showing another distribution of printing holes in the printing screen of this utility model;
[0024] Figure 7 for Figure 6 Enlarged view of center circle B;
[0025] Figure 8 for Figure 6 An enlarged view of the center circle C;
[0026] Figure 9 This is an enlarged schematic diagram of circle D in circle 6. Detailed Implementation
[0027] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.
[0028] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0030] This utility model discloses a printing screen, which includes a carrier and printing holes penetrating the carrier. Each printing hole includes a hole sidewall formed on the thickness of the carrier and a cavity enclosed by the hole sidewall. The hole sidewall includes a structural wall and a stress-dispersing wall along the periphery of the hole. During printing, the squeegee moves the conductive ink on the printing screen. The stress-dispersing wall disperses the forces exerted by the squeegee and ink on the printing holes, preventing stress concentration and damage to the printing holes. This ensures the hole shape, extends the lifespan of the printing screen, improves ink application performance, increases production yield, and guarantees printing quality.
[0031] In one embodiment, the stress-dispersing wall is arc-shaped and / or continuously multi-segmented. The arc-shaped stress-dispersing wall has an arc angle ranging from 40° to 180°. The stress-dispersing wall is an arc-shaped end between two parallel structural walls, or an arc-shaped chamfer between two mutually perpendicular structural walls. The continuously multi-segmented stress-dispersing wall includes at least two smoothly connected arc segments, or it includes at least three consecutive straight segments with an angle greater than 90° between adjacent straight segments. Alternatively, it can be a combination of arc-shaped and continuously multi-segmented designs. Arc-shaped and continuously multi-segmented stress-dispersing walls can effectively disperse stress, improve service life and production yield, and ensure printing quality.
[0032] In one embodiment, the carrier includes a first base layer and a second base layer stacked together. The printed hole includes a first opening penetrating the first base layer and a second opening penetrating the second base layer and corresponding to the first opening. The diameter of the first opening is smaller than the diameter of the second opening. The structural walls and stress-dispersing walls of the first opening are either the same as or different from the structural walls and stress-dispersing walls of the second opening. The first base layer is a metal layer or a polymer layer, such as a nickel layer, an alloy nickel layer, a tin layer, a PI layer, etc. The second base layer is a metal layer, such as a nickel layer, an alloy nickel layer, etc.
[0033] In one embodiment, the printing screen is a fine grid screen, the printing holes are fine grid lines, the fine grid lines extend along a first direction, and a plurality of fine grid lines are spaced apart along the first direction and spaced apart along a second direction.
[0034] In one embodiment, the printing screen is a main grid screen, and the printing holes include main grid seams extending along a second direction. A plurality of main grid seams are spaced apart along a first direction. Each main grid seam includes a main line extending along the second direction, a harpoon-shaped portion at the end of the main line, and pads spaced apart from the main line. The printing holes also include main grid slots extending along the first direction. A plurality of main grid slots are arranged along the second direction to form a connecting group. The main grid slots are cylindrical or waist-shaped.
[0035] In one embodiment, the printed hole includes a plurality of fine grid seams and a plurality of main grid seams arranged in a row.
[0036] This utility model also discloses a solar cell, which includes a semiconductor substrate and an electrode structure disposed on the semiconductor substrate and printed by a printing screen as described above, thereby ensuring the quality of the electrode structure and improving conductivity.
[0037] This utility model also discloses a photovoltaic module, which includes a plurality of solar cells as described above and solder strips connecting the plurality of solar cells, thereby improving quality and conversion efficiency.
[0038] Please refer to the following: Figures 1 to 9 The printing screen of this utility model is described by example.
[0039] Please refer to Figures 1 to 2 This utility model discloses a printing screen 100, which includes a carrier 101 and printing holes 102 penetrating the carrier. The printing holes 102 include hole sidewalls 1 formed on the thickness of the carrier 101 and a cavity 2 enclosed by the hole sidewalls 1. The hole sidewalls 1 include structural walls 11 and stress-dispersing walls 12 along the periphery of the hole. During printing, the squeegee moves the conductive paste on the printing screen 100, and the stress-dispersing walls 12 disperse the forces exerted by the squeegee and paste on the printing holes, preventing stress concentration and damage to the printing holes 102. This ensures the hole shape of the printing holes 102, improves the service life of the printing screen 100, enhances ink application performance, increases the production yield, and guarantees printing quality.
[0040] Please refer to Figure 2 In this embodiment, the stress-dispersing wall 12 is arc-shaped with an arc angle of 90°. The stress-dispersing wall 12 is an arc-shaped chamfer between two mutually perpendicular structural walls 11. The carrier 101 includes a first base layer 1011 and a second base layer 1012 stacked together. The printing hole 102 includes a first opening 1021 penetrating the first base layer 1011 and a second opening 1022 penetrating the second base layer 1012. The first opening 1021 and the second opening 1022 are correspondingly arranged, and the diameter of the first opening 1021 is smaller than the diameter of the second opening 1022. The stress-dispersing walls 12 of the first opening 1021 and the second opening 1022 are both chamfered. In other embodiments, the stress-dispersing walls 12 of the first opening 1021 and the second opening 1022 may be arranged differently. In this embodiment, the first base layer 1011 is a nickel layer, and the second base layer 1012 is also a nickel layer.
[0041] Please refer to Figure 1 and Figure 2 In this embodiment, the printing screen 100 is a fine grid screen, and the printing holes 102 are fine grid lines. The fine grid lines extend along the first direction X, and a plurality of fine grid lines are spaced apart along the first direction X and spaced apart along the second direction Y. The fine grid lines are provided with stress-dispersing walls 12, which are arc-shaped chamfers between two mutually perpendicular structural walls 11. These walls can disperse stress, improve ink absorption, ensure printing quality, and improve efficiency.
[0042] In other embodiments, please refer to Figure 3 The stress-dispersing wall 14 is arc-shaped; specifically, the stress-dispersing wall 14 is the arc-shaped end between two parallel structural walls 13. Please refer to... Figure 4 and Figure 5Both stress-dispersing walls 15 and 16 are continuous multi-segment structures, with stress-dispersing wall 15 being a three-segment continuous structure and stress-dispersing wall 16 being a seven-segment structure. Both can disperse stress, improve ink absorption, ensure printing quality, and increase efficiency.
[0043] Please refer to Figures 6 to 9 This utility model discloses another printing screen 200, which includes a carrier 201 and printing holes 202 penetrating the carrier. The printing holes 202 include hole sidewalls 3 formed on the thickness of the carrier 201 and a cavity 4 enclosed by the hole sidewalls 3. The hole sidewalls 3 include structural walls 31 and stress-dispersing walls 32 along the periphery of the hole. During printing, the stress-dispersing walls 32 disperse the forces exerted by the doctor blade and ink on the printing holes, preventing stress concentration and damage to the printing holes 202. This ensures the hole shape of the printing holes 202, improves the service life of the printing screen 200, enhances ink application performance, increases production yield, and guarantees printing quality.
[0044] In this embodiment, the printing screen 200 is the main grid screen, and the printing holes 202 include main grid seams 5. The main grid seams 5 extend along the second direction Y, and a plurality of main grid seams 5 are arranged at intervals along the first direction X. The main grid seam 5 includes a main line 51 extending along the second direction Y, a harpoon portion 52 located at one end of the main line 51, and pad portions 53 spaced apart on the main line. The main line 51, the harpoon portion 52, and the pad portions 53 all include a structural wall 31 and a stress-dispersing wall 32. The stress-dispersing wall 32 has a chamfered and arc-shaped end to disperse stress, improve ink absorption, and improve printing quality. In other embodiments, the stress-dispersing wall 32 may also be configured as a multi-segment structure.
[0045] The printing hole 202 also includes a main grid slit 6, which extends along a first direction X. Several main grid slits 6 are arranged along a second direction Y to form a connecting group. The main grid slit 6 is cylindrical and has two parallel structural walls 31 and stress-dispersing walls 32 located at both ends connecting the two structural walls 31. The stress-dispersing walls 32 have arc-shaped ends and a multi-segment combination to disperse stress, improve ink absorption, and improve printing quality.
[0046] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail above with reference to the accompanying drawings. Many specific details are set forth in the above description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described above, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, the technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; however, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.
[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A printing screen, characterized in that, It includes a carrier and a printing hole that penetrates the carrier. The printing hole includes a hole sidewall provided on the thickness of the carrier and a cavity formed by the hole sidewall. The hole sidewall includes a structural wall and a stress-dispersing wall along the periphery of the hole.
2. The printing screen according to claim 1, characterized in that, The stress-dispersing wall is in the form of an arc and / or a continuous multi-segment structure.
3. The printing screen according to claim 2, characterized in that, The stress-dispersing wall is arc-shaped, with an arc angle ranging from 45° to 180°.
4. The printing screen according to claim 2, characterized in that, The stress-dispersing wall is an arc-shaped end between two parallel structural walls, or the stress-dispersing wall is an arc-shaped chamfer between two mutually perpendicular structural walls.
5. The printing screen according to claim 2, characterized in that, The stress-dispersing wall is a continuous multi-segment structure, comprising at least two smoothly connected arc segments, or at least three consecutive straight segments.
6. The printing screen according to claim 1, characterized in that, The carrier includes a first base layer and a second base layer stacked together. The printing hole includes a first opening penetrating the first base layer and a second opening penetrating the second base layer and corresponding to the first opening. The diameter of the first opening is smaller than the diameter of the second opening.
7. The printing screen according to claim 6, characterized in that, The structural wall and stress-dispersing wall of the first opening are configured the same as or different from the structural wall and stress-dispersing wall of the second opening.
8. The printing screen according to any one of claims 1 to 7, characterized in that, The printing screen is a fine grid screen, the printing holes are fine grid lines, the fine grid lines extend along a first direction, and a plurality of the fine grid lines are spaced apart along the first direction and spaced apart along a second direction.
9. The printing screen according to any one of claims 1 to 7, characterized in that, The printing screen is a main grid screen, and the printing holes include main grid seams. The main grid seams extend along a second direction, and a plurality of the main grid seams are spaced apart along a first direction. The main grid seams include a main line extending along the second direction, a harpoon portion located at the end of the main line, and pad portions spaced apart on the main line.
10. The printing screen according to claim 9, characterized in that, The printing hole also includes a main grid gap, which extends along a first direction, and several main grid gaps are arranged along a second direction to form a connecting group. The main grid gap is in the shape of a tube bone or a waist-shaped hole.
11. The printing screen according to any one of claims 1 to 7, characterized in that, The printed holes include a plurality of fine grid seams and a plurality of main grid seams arranged in a row.
12. A solar cell, characterized in that, It includes a semiconductor substrate and an electrode structure disposed on the semiconductor substrate and printed by a screen printing plate as described in any one of claims 1 to 10.
13. A photovoltaic module, characterized in that, It includes a plurality of solar cells as described in claim 12 and solder strips connecting the plurality of solar cells.