CN115084287B - Preparation method of grid line and solar cell - Google Patents
Preparation method of grid line and solar cell Download PDFInfo
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- CN115084287B CN115084287B CN202210514106.8A CN202210514106A CN115084287B CN 115084287 B CN115084287 B CN 115084287B CN 202210514106 A CN202210514106 A CN 202210514106A CN 115084287 B CN115084287 B CN 115084287B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000007639 printing Methods 0.000 claims abstract description 40
- 238000007790 scraping Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000007650 screen-printing Methods 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 3
- 238000005245 sintering Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 11
- 239000004332 silver Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 230000005684 electric field Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The application provides a preparation method of a grid line and a solar cell, and relates to the field of photovoltaics. The preparation method comprises the following steps: placing a matched screen printing plate on the surface of the battery piece, which is to be printed with the grid lines, attaching conductive paste on the surface of the screen printing plate, pressing a scraping plate against the surface of the screen printing plate above a lower knife area of the battery piece, and moving the scraping plate in the direction of a main printing area of the battery piece in the area of the surface of the screen printing plate corresponding to the battery piece so as to print the conductive paste on the surface of the battery piece through the screen printing plate to form the grid lines; the length of the lower knife area is not more than 1/5 of the length of the battery piece; the moving speed of the scraping plate in the lower cutter area is smaller than that of the scraping plate in the middle. The grid line manufactured by the method is not easy to generate the phenomena of thick line, broken grid virtual printing and uneven thickness, and can improve the efficiency of the solar cell.
Description
Technical Field
The application relates to the field of photovoltaics, in particular to a preparation method of a grid line and a solar cell.
Background
Photovoltaic solar cells are the core part of a solar power generation system and are the most valuable part of the solar power generation system. The quality of the photovoltaic solar cell directly determines the quality of the whole solar power generation system, and grid lines on the cell can collect carriers generated by the cell and output current to the outside.
In the preparation of a photovoltaic solar cell, a screen printing method is generally adopted to print slurry on the surface of the photovoltaic solar cell to form grid lines. However, when the grid lines are printed, the printing speed is too high, so that the grid lines at the edge parts of the solar cells are easy to have the technical problems of thick lines, broken grid virtual printing, uneven thickness and the like, and the energy conversion efficiency of the solar cells is affected.
Disclosure of Invention
The embodiment of the application aims to provide a preparation method of a grid line and a solar cell, and the solar cell prepared by the preparation method has the advantages that the phenomena of thick lines, broken grid virtual marks and uneven thickness of the grid line at the edge part are not easy to occur, and the efficiency of the solar cell can be improved.
In a first aspect, an embodiment of the present application provides a method for manufacturing a gate line, including the following steps: placing a matched screen printing plate on the surface of the battery piece, which is to be printed with the grid lines, attaching conductive paste on the surface of the screen printing plate, pressing a scraping plate against the surface of the screen printing plate above a lower knife area of the battery piece, and moving the scraping plate in the direction of a main printing area of the battery piece in the area of the surface of the screen printing plate corresponding to the battery piece so as to print the conductive paste on the surface of the battery piece through the screen printing plate to form the grid lines; the length of the lower knife area is not more than 1/5 of the length of the battery piece; the moving speed of the scraping plate in the lower cutter area is smaller than that of the scraping plate in the main printing area.
The inventor finds that when the grid line is directly printed on the surface of the battery piece through screen printing, the scraping plate is sprung up due to the height difference between the battery piece and the table top, and then falls down to the surface of the battery piece, and the process can lead to the fact that the part of the lower knife area of the battery piece cannot obtain stable pressure, which is the main reason for the phenomena of thick line, broken grid virtual printing, uneven thickness and the like of the grid line at the edge part of the battery piece.
Therefore, in the technical scheme, when the scraping plate moves from the lower cutter area to the main printing area, the moving speed of the scraping plate in the lower cutter area is ensured to be smaller than that of the scraping plate in the main printing area, so that the edge part of the battery piece can obtain stable pressure, the grid line is stably printed on the edge part of the battery piece, and the phenomena of thick line, broken grid virtual printing, uneven thickness and the like of the grid line at the edge part of the battery piece are greatly reduced; and the length of the lower cutter region cannot be greater than 1/5 of the length of the battery piece.
In one possible implementation, the moving speed of the scraping plate in the lower cutter area is 1-300 mm/s, and the moving speed of the scraping plate in the main printing area is 300-600 mm/s.
In the technical scheme, the moving speed of the control scraping plate in the battery piece cutting area is 1-300 m m/s, and the speed of the control scraping plate on the surface of the battery piece is 300-600 mm/s, so that the pressure of the battery piece cutting area is more stable, and the formed grid lines are less prone to phenomena of thick lines, broken grid virtual marks, uneven thickness and the like.
In one possible implementation, the squeegee is moved at a speed of 50 to 150mm/s in the lower blade region and 300 to 500mm/s in the main print region.
In one possible implementation, the squeegee movement speed remains constant as the squeegee moves across the main printing area.
In the technical scheme, the speed of the scraping plate is kept constant when the main printing area moves, the slurry outlet amount of the conductive slurry is uniform, and the generated grid line is firmer.
In one possible implementation, the conductive paste is one or both of silver paste and aluminum paste.
In the technical scheme, the silver paste can be printed on the front surface of the battery piece to form the grid line and the positive electrode, the aluminum paste can be printed on the back surface of the battery piece to form the back electric field, and the preparation method in the embodiment of the application is matched with specific paste, so that the front surface grid line can be prepared, and the back electrode and the back electric field can be prepared.
In one possible implementation, the thickness of the battery plate is 100-185 μm, and the surface area of the battery plate is 23895-44096 mm 2 。
In the technical scheme, the thickness of the battery piece is kept in the range of 100-185 cm, so that the pressure of the lower knife area of the battery piece is ensured to be more stable when the grid line is formed.
In one possible implementation, the line width of the screen is 12-40 μm, the line diameter of the screen is 10-23 mm, and the porosity of the screen is 25-57.
In the technical scheme, if the line width of the screen is too large, the printed grid line is too wide, the shading area of the grid line is increased, and after the solar cell is manufactured, the light absorption efficiency is reduced, and the cell performance is also reduced; if the line width of the screen is too small, the printing is difficult, the grid breakage is more, and the current collection difficulty is increased.
In one possible implementation, after printing and forming the gate line, a step of sintering treatment is further included; optionally, the sintering temperature is 700-900 ℃ and the sintering time is 0.4-1 min.
In the technical scheme, in order to ensure that the preparation of the battery can be completed, the organic solvent in the grid line is required to be dried by sintering treatment, and the grid line and the battery piece form good ohmic contact; if the sintering temperature is too low and the sintering time is too short, it is difficult to form good ohmic contact between the printing silver paste and the battery piece; if the sintering temperature is too high, the sintering time is too long, so that the battery piece can be burnt out, and the efficiency and the reliability of the battery are seriously affected.
In one possible implementation, after printing and forming the gate line, a step of curing treatment is further included; optionally, the curing temperature is 150-500 ℃ and the curing time is 1-40 min.
In the above technical solution, the curing treatment is performed after printing, which is generally used for preparing a HIT (Het erojunction with intrinsic Thinlayer, intrinsic thin film heterojunction) battery, and the curing treatment can enable a good ohmic contact between a battery piece and a grid line in the HIT battery.
In a second aspect, an embodiment of the present application provides a solar cell, which includes a cell and a grid line located on a surface of the cell, where the grid line is made by the above-mentioned method for manufacturing a grid line.
In the technical scheme, the grid lines in the solar cell are manufactured by the manufacturing method, so that the phenomena of thick lines, broken grid virtual marks, uneven thickness and the like of the grid lines at the edge part of the solar cell are not easy to occur, and the cell efficiency is higher, the appearance is more uniform and the reliability is better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of battery plates provided in examples 1 to 2 and comparative examples 1 to 3 of the present application;
FIG. 2 is a graph of travel versus speed for a screed provided in example 1 of the present application;
FIG. 3 is a graph of travel versus speed for a screed provided in example 2 of the present application;
fig. 4 is a schematic structural diagram of a battery sheet according to embodiment 3 of the present application;
FIG. 5 is a graph of travel versus speed for a screed provided in example 3 of the present application;
fig. 6 is a graph of stroke-speed relationship of the squeegee provided in comparative example 1 of the present application.
Detailed Description
Because screen printing can rapidly print and prepare grid lines on the surface of a battery piece, when preparing a solar battery, a scraping plate in a printing machine is commonly used for printing conductive paste containing metal on a silicon wafer through screen meshes to form circuits or grid lines, and in order to shorten the preparation time and improve the preparation efficiency, the current screen printing speed is faster and faster. However, the inventors found that with the increasing speed of screen printing, the gate lines are prone to abnormal problems such as thick lines, broken gate marks, uneven thickness, and the like.
The inventor also finds that the scraping plate is firstly arranged above the lower cutter area of the battery piece and moves to the main printing area of the battery piece along the length direction of the battery piece, so that the moving speed of the scraping plate in the lower cutter area of the battery piece is ensured to be smaller than that in the main printing area, and the phenomena of thick lines, broken grid virtual printing, uneven thickness and the like can be greatly reduced.
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In addition, the method for manufacturing the gate line in this embodiment is applicable not only to manufacturing the gate line but also to manufacturing the electrode. In the solar cell, the electrodes comprise a positive electrode and a back electrode, and can play roles in summarizing current and welding a welding strip; the grid line can collect current but does not weld the strap.
The method for manufacturing the grid line, namely the solar cell, in the embodiment of the application is specifically described below.
The preparation method of the grid line comprises the following steps in sequence:
and S100, printing the conductive paste on the screen plate on the surface of the battery piece through the scraping plate on the printer to form grid lines, wherein the screen plate is matched with the battery piece, and the moving speed of the scraping plate is changed according to the relative position of the scraping plate and the battery piece.
Specifically, the scraping plate is abutted against the surface of the screen plate, and then the scraping plate is located above the lower cutter area of the battery piece, and then the scraping plate is moved along the length direction of the battery piece until the scraping plate completely passes through the main printing area of the battery piece and moves towards the other edge of the battery piece opposite to the lower cutter area. Wherein the length of the lower blade region of the blade is not more than 1/5 of the length of the battery piece, more specifically, the length of the lower blade region portion of the blade is not more than 1/10 of the length of the battery piece.
In this embodiment, the "movement of the blade along the length direction of the battery plate" does not mean that the blade is moved along the longer side of the battery plate, but may also mean that the blade is moved along the shorter side of the battery plate, and the "movement of the blade along the length direction of the battery plate" merely means that the blade is moved along a specific direction.
One edge of the battery piece is called a lower cutter area, the middle part of the battery piece is called a main printing area, the other opposite edge is called a cutter collecting area, and the structure of the battery piece is shown in fig. 4; and the length of the lower cutter area is the same as that of the collecting cutter area, so that the difficulty in subsequent grid line printing is reduced. Of course, in other embodiments, the length of the take-up region and the length of the lower region may be different; even in other embodiments, the receiving zone may not be provided, and only the lower zone and the main printing zone may be provided (see fig. 1).
The squeegee will pass through the main printing area and the take-up area in sequence from the lower cutting area, the movement speed of the squeegee in the lower cutting area and the take-up area is smaller than that in the main printing area, specifically, the movement speed of the squeegee in the lower cutting area is 1-300 mm/s, more specifically, 50-150 mm/s, such as 30mm/s, 50mm/s, 60mm/s, 80mm/s, 100mm/s, 110mm/s, 150mm/s, 180mm/s, 200mm/s, 250mm/s or 300mm/s; the speed of movement in the main printing area is 300 to 600mm/s, more specifically, 300 to 500mm/s, for example 300mm/s, 350mm/s, 400mm/s, 450mm/s, 500m m/s or 600mm/s; the speed of movement in the receiving zone is 1 to 300mm/s, more specifically, may be 50 to 150mm/s, for example 35mm/s, 50mm/s, 70mm/s, 90mm/s, 120mm/s, 140mm/s, 160mm/s, 190mm/s, 200mm/s, 250mm/s or 300mm/s.
In order to reduce the preparation difficulty, the moving speed of the scraping plate in the cutter receiving area is generally the same as that in the cutter discharging area, and in order to ensure that the slurry discharge amount of the conductive slurry is more uniform, the generated grid line is more stable, and the speed of the scraping plate is kept constant when the scraping plate moves in the main printing area.
The moving speed of the scraping plate is regulated and controlled to be 1-300 mm/s in the lower knife area and is smaller than 300-600 mm/s in the main printing area, so that the edge part of the battery piece can obtain stable pressure, the grid line is stably printed on the edge part of the battery piece, and the phenomena of thick line, broken grid virtual printing, uneven thickness and the like of the grid line at the edge part of the battery piece are greatly reduced.
In addition, the thickness of the battery piece in the step is in the range of 100-185 mu m, so that the pressure of the edge part of the battery piece is more stable when the grid line is formed.
In the step, the wire diameter of the screen plate is 10-23 mm, the porosity is 25-57, the wire width is 12-40 mu m, if the wire width is too large, the printed grid line is too wide, the shading area of the grid line is increased, and the light absorption efficiency is reduced and the battery performance is also reduced after the solar battery is manufactured; the line width of the screen plate is too small, which can cause the increase of printing difficulty, the increase of broken grids and the influence on efficiency.
In the step, the conductive paste is one or two of silver paste and aluminum paste. The silver paste can be printed on the front surface of the battery piece to form grid lines, and the aluminum paste can be printed on the back surface of the battery piece to form a back surface electric field, so that the battery can be replaced at any time according to the requirement. Illustratively, the conductive pastes in the embodiments of the present application are all silver pastes.
And S200, after the grid lines are printed and formed, sintering treatment is carried out.
The sintering treatment can dry the organic solvent in the grid line, so that the grid line and the battery piece form good ohmic contact, and the battery preparation is completed; however, during sintering treatment, the sintering temperature and the sintering time need to be controlled within a reasonable range, and if the sintering temperature is too low or the sintering time is too short, good ohmic contact cannot be formed between the grid line and the battery piece; if the sintering temperature is too high, the sintering time is too long, so that the battery piece can be burnt out, and the efficiency and the reliability of the battery are seriously affected. Specifically, the sintering temperature is generally controlled to 700 to 900 ℃, and may be 700 ℃, 720 ℃, 740 ℃, 760 ℃, 780 ℃, 800 ℃, 850 ℃ or 900 ℃, for example; the sintering time is generally controlled to be 0.4-1 min. For example, it may be 0.4min, 0.5min, 0.6min, 0.7min, 0.8min or 0.9min.
Of course, in other embodiments, the firing process may not be performed after the gate lines are printed and formed, but a curing process may be used instead of the firing process; the use of a curing process instead of a sintering process is generally an operation that is performed when manufacturing a HIT battery to ensure good ohmic contact between the gate lines and the battery plates of the HIT battery. In the curing process, the curing temperature is generally 150-500 ℃ and the curing time is generally 1-40 min.
The features and capabilities of the present application are described in further detail below in connection with the examples.
Example 1
The embodiment of the application provides a solar cell, which comprises a cell piece and a grid line positioned on the surface of the cell piece, wherein the preparation method of the grid line is as follows:
taking the material with the thickness of 170 mu m and the area of 27415cm 2 Is a battery plate; selecting a printer with the model of MAXWEL, using silver paste as conductive paste, selecting a screen with the wire diameter of 23 mu m, the porosity of 29.11 and the wire width of 21 mu m to be matched with the battery piece, enabling a scraper in the printer to contact with the screen and move on the screen along the length direction of the battery piece, completely passing through the edge (namely a lower cutter area, see figure 1) of the battery piece, completely passing through the middle (namely a main printing area, see figure 1) of the battery piece, leaving the screen, and printing on the surface of the battery pieceBrushing out silver grid lines, wherein the length of the edge of the battery piece is 45/230 of the length of the battery piece; the initial speed of the squeegee was 100mm/s, the moving speed was kept constant when passing through the lower nip, the moving speed was 400mm/s when passing through the main nip, and the stroke-speed relationship of the squeegee was as shown in fig. 2.
After printing, the battery piece containing the silver grid line is sintered at 760 ℃ for 0.6min.
Example 2
The embodiment of the application provides a solar cell, which comprises a cell piece and a grid line positioned on the surface of the cell piece, wherein compared with the embodiment 1, the preparation method of the grid line is mainly different from the following steps:
the initial speed of the scraper is 400mm/s, and the speed is 100mm/s when passing through the lower cutter area; the subsequent pass through the main nip at a speed of 400mm/s and the stroke-speed relationship of the squeegee is shown in fig. 3, CT (Cycle Time) in fig. 3 referring to the time required for one print cycle.
Example 3
The embodiment of the application provides a solar cell, which comprises a cell piece and a grid line positioned on the surface of the cell piece, wherein the preparation method of the grid line is mainly different from that of the embodiment 1 in that:
the scraping plate in the printer is contacted with the screen plate and moves on the screen plate along the length direction of the battery piece, firstly, the scraping plate completely passes through the edge (namely a lower cutter area, see fig. 4) of the battery piece, then completely passes through the middle part (namely a main printing area, see fig. 4) of the battery piece, then moves towards the other edge (namely a cutter receiving area, see fig. 4) of the battery piece, completely passes through the cutter receiving area of the battery piece, then leaves the screen plate, silver grid lines are printed on the surface of the battery piece, and the length of the edge of the battery piece is 45/230 of the length of the battery piece; the initial speed of the squeegee was 100mm/s, the moving speed was maintained constant while passing through the lower nip, the moving speed was 400mm/s while passing through the main nip, the speed was 100mm/s while passing through the take-up nip, and the stroke-speed relationship of the squeegee was as shown in fig. 5.
Example 4
The embodiment of the application provides a solar cell, which comprises a cell piece and a grid line positioned on the surface of the cell piece, wherein compared with the embodiment 1, the preparation method of the grid line mainly has the following differences:
the squeegee passed through the lower nip at a movement speed of 160mm/s and passed through the main nip at a movement speed of 550mm/s.
Comparative example 1
The embodiment of the application provides a solar cell, which comprises a cell piece and a grid line positioned on the surface of the cell piece, wherein compared with the embodiment 1, the preparation method of the grid line mainly has the following differences:
the speed of the blade was maintained at 400mm/s all the time while the blade was moved along the length of the battery sheet, and fig. 6 is a graph showing the stroke-speed relationship of the blade of this comparative example.
The changes in the squeegee movement speeds in examples 1 to 4 and comparative example 1 are shown in table 1:
table 1 examples 1 to 4 and comparative example 1 changes in squeegee movement speed
Application example
Electrical property detection
The performance of the solar cells of examples 1 to 4 and comparative example 1 was tested using a hall test system, and the results are shown in table 2:
table 2 electrical properties of the solar cells in examples 1 to 4 and comparative example 1
As can be seen from table 2, the gate line manufactured by the method according to the embodiment of the present application can improve the short-circuit current and the fill factor of the solar cell, thereby improving the conversion efficiency of the solar cell. In addition, compared with a battery prepared in a conventional mode, the external appearance is more uniform in grid line width, free of chromatic aberration and higher in reliability.
The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. The preparation method of the grid line is characterized by comprising the following steps of:
placing a matched screen printing plate on the surface of a battery piece to be printed with a grid line, attaching conductive paste on the surface of the screen printing plate, pressing a scraping plate against the surface of the screen printing plate above a lower knife area of the battery piece, and moving the scraping plate in the direction of a main printing area of the battery piece in the area of the surface of the screen printing plate corresponding to the battery piece so as to print the conductive paste on the surface of the battery piece through the screen printing plate to form the grid line; the length of the lower cutter area is not more than 1/5 of the length of the battery piece;
the moving speed of the scraping plate in the lower cutter area is smaller than that of the scraping plate in the main printing area.
2. The method for manufacturing a grid line according to claim 1, wherein the moving speed of the scraper in the lower cutter area is 1-300 mm/s, and the moving speed of the scraper in the main printing area is 300-600 mm/s.
3. The method for manufacturing a grid line according to claim 2, wherein the moving speed of the scraper in the lower cutter area is 50-150 mm/s, and the moving speed of the scraper in the main printing area is 300-500 mm/s.
4. A method of producing a grid line according to any one of claims 1 to 3, wherein the moving speed of the squeegee is kept constant while the squeegee is moving in the main printing area.
5. The method of manufacturing a gate line according to claim 1, wherein the conductive paste is one or both of silver paste and aluminum paste.
6. The method for manufacturing a grid line according to claim 1, wherein the thickness of the battery piece is 100-185 μm, and the surface area of the battery piece is 23895-44096 mm 2 。
7. The method for manufacturing a grid line according to claim 1, wherein the line width of the screen is 12-40 μm, the line diameter of the screen is 10-23 mm, and the porosity of the screen is 25-57.
8. The method of manufacturing a gate line according to claim 1, further comprising a step of sintering treatment after printing and forming the gate line; optionally, the sintering temperature is 700-900 ℃ and the sintering time is 0.4-1 min.
9. The method of manufacturing a gate line according to claim 1, further comprising a step of curing treatment after printing and forming the gate line; optionally, the curing temperature is 150-500 ℃ and the curing time is 1-40 min.
10. A solar cell comprising a cell sheet and a grid line on the surface of the cell sheet, the grid line being produced by the method of producing a grid line according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210514106.8A CN115084287B (en) | 2022-05-11 | 2022-05-11 | Preparation method of grid line and solar cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210514106.8A CN115084287B (en) | 2022-05-11 | 2022-05-11 | Preparation method of grid line and solar cell |
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| CN115084287B true CN115084287B (en) | 2024-03-29 |
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| JP2010010546A (en) * | 2008-06-30 | 2010-01-14 | Kyocera Corp | Method of manufacturing substrate with electrode, method of manufacturing solar battery element and screen printing device |
| JP2011131498A (en) * | 2009-12-24 | 2011-07-07 | Micro-Tec Co Ltd | Screen printing machine and screen printing method |
| JP2013222840A (en) * | 2012-04-17 | 2013-10-28 | Shin Etsu Chem Co Ltd | Method for manufacturing solar cell and solar cell |
| DE102012220805A1 (en) * | 2012-11-14 | 2014-05-15 | Deutsche Cell Gmbh | Method for printing on wafer surface e.g. solar cell surface, involves varying relative speed between squeegee and screen mask during printing process, so that various regions of wafer surface are printed with different print speeds |
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| JP2010010546A (en) * | 2008-06-30 | 2010-01-14 | Kyocera Corp | Method of manufacturing substrate with electrode, method of manufacturing solar battery element and screen printing device |
| JP2011131498A (en) * | 2009-12-24 | 2011-07-07 | Micro-Tec Co Ltd | Screen printing machine and screen printing method |
| JP2013222840A (en) * | 2012-04-17 | 2013-10-28 | Shin Etsu Chem Co Ltd | Method for manufacturing solar cell and solar cell |
| DE102012220805A1 (en) * | 2012-11-14 | 2014-05-15 | Deutsche Cell Gmbh | Method for printing on wafer surface e.g. solar cell surface, involves varying relative speed between squeegee and screen mask during printing process, so that various regions of wafer surface are printed with different print speeds |
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