CN214203702U - Screen printing plate pattern of solar cell and photovoltaic module - Google Patents
Screen printing plate pattern of solar cell and photovoltaic module Download PDFInfo
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- CN214203702U CN214203702U CN202120565890.6U CN202120565890U CN214203702U CN 214203702 U CN214203702 U CN 214203702U CN 202120565890 U CN202120565890 U CN 202120565890U CN 214203702 U CN214203702 U CN 214203702U
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Abstract
The utility model discloses a half tone figure and photovoltaic module of solar wafer, half tone figure is including the center area of printing at the wafer central point position, establish two first districts at center area left and right sides limit and establish two second districts at center area upper and lower both sides limit, the center area is equipped with a plurality of first thin grid lines, the first district is equipped with the thin grid line of a plurality of seconds, the second district is equipped with the thin grid line of a plurality of third, first thin grid line, the equal parallel arrangement of the thin grid line of second and third, the thin grid line of a plurality of seconds and a plurality of first thin grid line one-to-ones, the width that is located the thin grid line of the second of same straight line is greater than the width of first thin grid line, the width of the thin grid line of third is greater than the width of first thin grid line. The utility model provides a half tone figure can not only improve because half tone long-term printing leads to half tone to warp the overprinting technology that brings to half tone open-ended tolerance to improve half tone life, can also reduce the shading area of battery piece, thereby improve screen printing precision and battery efficiency.
Description
Technical Field
The utility model relates to a photovoltaic module field especially relates to a solar wafer's half tone figure and photovoltaic module.
Background
The short-circuit current is one of the main parameters affecting the electrical performance of the solar cell, and in order to increase the short-circuit current, the simplest method is to reduce the shading area of the solar cell, and to reduce shading, the pattern design is generally optimized, for example, the number of grid lines is reduced, and the openings of the grid lines are reduced. However, the process of the solar cell is more and more complex at present, and the precision requirement on the process is higher and higher. Particularly, overprinting in the screen printing process, for example, printing of an Al grid line on the back of a double-sided battery, in the printing process, an LCO laser opening needs to be overlapped with the Al grid line, if the LCO laser opening is dislocated, EL black spots can be generated, and the electrical performance of a battery piece is seriously affected, so that in the screen printing process, the Al grid line is always ensured to cover an LCO laser opening area as far as possible, the opening of the Al grid line is generally designed to be wider, but if the Al grid line is too wide, the shading area of the back is affected. Meanwhile, a disadvantage of the screen printing process is that, as the printing time increases, the screen printing plate has a deformation problem, particularly, the deformation of the edge area of the screen printing plate is particularly serious, and the problem is an important factor affecting the printing quality and the service life of the screen printing plate for the screen printing process requiring overprinting, so that the problem is frequently encountered that the Al grid lines are designed to be wide enough, the printing quality and the overprinting are not problematic at the beginning of printing, but after the screen printing process is printed for a period of time, the Al grid lines in the edge area cannot completely or completely cover the laser area of the LCO due to the deformation of the screen printing plate.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a solar wafer's half tone figure and photovoltaic module, technical scheme is as follows:
the utility model provides a half tone figure of solar wafer, half tone figure is in including printing center area, the setting that the battery piece central point put center area left and right sides limit in the center area two first districts and setting are in two second districts on both sides edge about the center area, the center area is provided with a plurality of first thin grid lines, and each first district is provided with the thin grid line of a plurality of seconds, and each second district is provided with the thin grid line of a plurality of third, the equal parallel arrangement of the thin grid line of first thin grid line, the thin grid line of second and the thin grid line one-to-one of third, a plurality of second are located same straight line the width of the thin grid line of second is greater than the width of first thin grid line, the width of the thin grid line of third is greater than the width of first thin grid line.
Further, the second thin gate line is a structure that widens from the central region to the left-side edge or the right-side edge.
Furthermore, the second thin grid line is in a ladder structure.
Furthermore, the first thin grid line is in a strip-shaped structure.
Further, the third thin gate line is a long strip structure, or the third thin gate line is a structure gradually widening from the center to both sides in the length direction.
Further, when the screen printing plate is printed on the front face of the battery piece, the width range of the first thin grid line is 8-25um, the width range of the second thin grid line is 8-35um, and the width range of the third thin grid line is 8-35 um.
Further, when the screen pattern is printed on the back surface of the battery piece, the width range of the first fine grid line is 50-200um, the width range of the second fine grid line is 50-300um, and the width range of the third fine grid line is 50-300 um.
The utility model also provides a solar wafer's half tone figure, half tone figure is in including printing center area and setting that the battery piece central point put center area edge or two marginal upper and lower sides, the center area is provided with a plurality of first thin grid lines, the marginal zone is provided with a plurality of thin grid lines, a plurality of first thin grid lines and a plurality of thin grid line one-to-ones of marginal zone, just the width of the thin grid line of marginal zone is greater than the width of the first thin grid line of central area.
Furthermore, the thin grid line at the edge region is in a structure which is widened from the central region to the left edge or the right edge, or the thin grid line at the edge region is in a long strip-shaped structure.
The utility model provides a photovoltaic module again, its include the battery piece and solar wafer's half tone figure, half tone figure printing is positive or the back at the battery piece.
The utility model provides a beneficial effect that technical scheme brought as follows:
the utility model provides a half tone figure of solar wafer, the width through the thin grid line that reduces half tone central zone and the width of the thin grid line that increases half tone figure edge zone not only can improve because half tone long-term printing leads to half tone to warp the overprinting technology that brings to half tone open-ended tolerance to improve the life of half tone, can also reduce the shading area of wafer, thereby improve the efficiency of screen printing's precision and battery.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a screen pattern of a solar cell according to an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1;
fig. 3 is another schematic structural diagram of a screen pattern of a solar cell according to an embodiment of the present invention;
fig. 4 is an enlarged view of fig. 2.
Wherein the reference numerals include: 1-a first thin gate line, 2-a second thin gate line, and 3-a third thin gate line.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
The utility model discloses an embodiment provides a solar wafer's half tone figure, half tone figure is in including printing at the central area of cell piece central point position and setting the marginal zone at central area edge, the central area is provided with a plurality of first thin grid lines 1, the marginal zone is provided with a plurality of thin grid lines, a plurality of first thin grid lines 1 and a plurality of thin grid line one-to-one of marginal zone, just the width of the thin grid line of marginal zone is greater than the width of first thin grid line 1. The central area edge refers to the left and right edges of the central area, the upper and lower edges of the central area, or the peripheral edge of the central area. The screen printing method has the advantages that the width of the thin grid line in the edge area of the screen plate graph is increased, the width of the thin grid line in the central area of the screen plate is reduced, the tolerance of the overprinting process to the screen plate opening due to the fact that the screen plate deforms in the long-term printing process can be improved, the service life of the screen plate is prolonged, the shading area of a battery piece can be reduced, and the screen printing precision and the battery efficiency are improved.
The utility model discloses a preferred embodiment provides a screen printing plate figure of solar wafer, and specific structure refers to fig. 1 to fig. 4, screen printing plate figure is including printing in the center area of cell piece central point position, setting is in two first districts and the setting of center area left and right sides edge are in two second districts on both sides edge about the center area, the center area is provided with a plurality of first thin grid line 1, first thin grid line 1 is preferably rectangular shape structure. Each first region is provided with a plurality of second thin grid lines 2, each second region is provided with a plurality of third thin grid lines 3, the first thin grid lines 1, the second thin grid lines 2 and the third thin grid lines 3 are all arranged in parallel, the plurality of second thin grid lines 2 correspond to the plurality of first thin grid lines 1 one by one, the width of the second thin grid lines 2 which are positioned on the same straight line is larger than that of the first thin grid lines 1, and the second thin grid lines 2 are in a structure which is widened from a central region to the left side edge or the right side edge; the width of the third thin gate line 3 is greater than that of the first thin gate line 1.
The second fine gate line 2 has the following specific structure: the first thin gate lines 1 and the second thin gate lines 2 located on the same straight line with the second thin gate lines 2 form a continuous structure, the second thin gate lines 2 are a structure widening from the central region to the left edge or the right edge, that is, the width of the second thin gate lines 2 close to the first thin gate lines 1 is smaller than the width of the second thin gate lines 2 close to the left edge or the right edge, and the second thin gate lines 2 are preferably in a trapezoid structure, as shown in fig. 2.
A disadvantage of screen printing is that as the printing time increases, the screen can suffer from distortion problems, particularly in the area of the screen edges, which is a significant factor in the lifetime of the screen which affects the quality of the print for the screen printing process to be performed. The width of the thin grid line of the edge region of the screen printing plate is increased, the width of the thin grid line of the central region of the screen printing plate is reduced, the tolerance of overprinting or secondary accurate alignment on the opening of the screen printing plate can be improved, and meanwhile, the shading area of a battery piece can be reduced.
The third fine gate line 3 has the following specific structure: the third thin gate line 3 is a long strip structure, or the third thin gate line 3 is a structure gradually widening from the center to both sides in the length direction, that is, the width of the middle of the third thin gate line 3 is smaller than the width of the edge of the third thin gate line 3, the middle of the third thin gate line 3 is a long strip structure, and both side edges of the third thin gate line are trapezoid structures, as shown in fig. 3 and 4.
When the screen printing plate pattern is printed on the front surface of the battery piece, the width range of the first thin grid line 1 is 8-25um, the width range of the second thin grid line 2 is 8-35um, and the width range of the third thin grid line 3 is 8-35 um.
When the screen pattern is printed on the back surface of the battery piece, the width range of the first thin grid line 1 is 50-200um, the width range of the second thin grid line 2 is 50-300um, and the width range of the third thin grid line 3 is 50-300 um.
The utility model discloses a screen printing plate figure of solar wafer, concrete structure refer to fig. 2 in another embodiment, screen printing plate figure is including printing in the center area of cell piece central point position and setting up and be in center area left and right sides edge or two marginal upper and lower sides, the center area is provided with a plurality of first thin grid lines 1, the marginal zone is provided with a plurality of thin grid lines, a plurality of first thin grid lines 1 and marginal zone a plurality of thin grid line one-to-one, just the width of marginal zone's thin grid line is greater than the width of first thin grid line 1.
The first thin gate lines 1 are in a strip-shaped structure, and the widths of the first thin gate lines 1 are the same. The thin grid lines at the edge region are in a structure which is widened from the central region to the left edge or the right edge, such as a trapezoid structure, or the thin grid lines at the edge region are in a strip-shaped structure.
When the screen printing plate is printed on the front surface of the battery piece, the width range of the first thin grid line 1 is 8-25um, and the width range of the thin grid line at the edge region is 8-35 um.
When the screen printing plate pattern is printed on the back surface of the battery piece, the width range of the first thin grid line 1 is 50-200um, and the width range of the thin grid line at the edge area is 50-300 um.
The utility model provides a half tone figure of solar wafer, the width through the thin grid line that reduces half tone central zone and the width of the thin grid line that increases half tone figure edge zone not only can improve because half tone long-term printing leads to half tone to warp the overprinting technology that brings to half tone open-ended tolerance to improve the life of half tone, can also reduce the shading area of wafer, thereby improve the efficiency of screen printing's precision and battery.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A screen printing plate graph of a solar cell is characterized in that the screen printing plate graph comprises a central area printed at the central position of the cell, two first areas arranged at the edges of the left side and the right side of the central area, and two second areas arranged at the edges of the upper side and the lower side of the central area, the central area is provided with a plurality of first thin grid lines (1), each first area is provided with a plurality of second thin grid lines (2), each second area is provided with a plurality of third thin grid lines (3), the first thin grid lines (1), the second thin grid lines (2) and the third thin grid lines (3) are all arranged in parallel, the second thin grid lines (2) correspond to the first thin grid lines (1) one by one, the width of the second thin grid lines (2) on the same straight line is larger than that of the first thin grid lines (1), the width of the third thin grid line (3) is larger than that of the first thin grid line (1).
2. The screen pattern of the solar cell piece according to claim 1, wherein the second fine grid lines (2) are in a structure which is widened from a central region to a left side edge or a right side edge.
3. The screen printing pattern of the solar cell piece as claimed in claim 2, wherein the second fine grid line (2) is a trapezoid structure.
4. The screen printing plate pattern of the solar cell piece as claimed in claim 1, wherein the first fine grid line (1) is a strip-shaped structure.
5. The screen printing plate pattern of the solar cell piece according to claim 1, wherein the third fine grid line (3) is a strip-shaped structure, or the third fine grid line (3) is a structure gradually widening from the center to both sides in the length direction.
6. The screen printing pattern of the solar cell piece according to claim 1, wherein when the screen printing pattern is printed on the front surface of the solar cell piece, the width of the first fine grid line (1) ranges from 8 um to 25um, the width of the second fine grid line (2) ranges from 8 um to 35um, and the width of the third fine grid line (3) ranges from 8 um to 35 um.
7. The screen pattern of the solar cell piece according to claim 1, wherein when the screen pattern is printed on the back surface of the solar cell piece, the width of the first fine grid line (1) ranges from 50 to 200um, the width of the second fine grid line (2) ranges from 50 to 300um, and the width of the third fine grid line (3) ranges from 50 to 300 um.
8. The screen printing plate graph of the solar cell is characterized by comprising a central area printed at the central position of the cell and two edge areas arranged at the edges of the left side and the right side of the central area or the edges of the upper side and the lower side of the central area, wherein the central area is provided with a plurality of first thin grid lines (1), the edge areas are provided with a plurality of thin grid lines, the plurality of first thin grid lines (1) correspond to the plurality of thin grid lines at the edge areas one by one, and the width of the thin grid lines at the edge areas is larger than that of the first thin grid lines (1) at the central area.
9. The screen printing plate pattern of the solar cell piece as claimed in claim 8, wherein the thin grid lines at the edge region are in a structure that is widened from the central region to the left edge or the right edge, or the thin grid lines at the edge region are in a strip-shaped structure.
10. A photovoltaic module comprising a cell sheet and a screen pattern of the solar cell sheet according to any one of claims 1 to 7, wherein the screen pattern is printed on the front or back side of the cell sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120565890.6U CN214203702U (en) | 2021-03-19 | 2021-03-19 | Screen printing plate pattern of solar cell and photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120565890.6U CN214203702U (en) | 2021-03-19 | 2021-03-19 | Screen printing plate pattern of solar cell and photovoltaic module |
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| CN214203702U true CN214203702U (en) | 2021-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226487A1 (en) * | 2022-05-23 | 2023-11-30 | 横店集团东磁股份有限公司 | All-black crystalline silicon solar cell and preparation method therefor, and photovoltaic module |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226487A1 (en) * | 2022-05-23 | 2023-11-30 | 横店集团东磁股份有限公司 | All-black crystalline silicon solar cell and preparation method therefor, and photovoltaic module |
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