CN104129183B - A kind of printing process of solar battery sheet front electrode - Google Patents
A kind of printing process of solar battery sheet front electrode Download PDFInfo
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- CN104129183B CN104129183B CN201410383606.8A CN201410383606A CN104129183B CN 104129183 B CN104129183 B CN 104129183B CN 201410383606 A CN201410383606 A CN 201410383606A CN 104129183 B CN104129183 B CN 104129183B
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- gate line
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
The present invention relates to the printing process of a kind of solar battery sheet front electrode, comprise the following steps: (a) is by fixing on the printer for the half tone comprising some thin grid line Printing Zones and some main gate line Printing Zones；B thin grid silver slurry is respectively printed at described thin grid line Printing Zone by (), end, main gate line Printing Zone makes it form thin grid line, main gate line end on described solar battery sheet, with post-drying solar battery sheet；C () is printed on remaining main gate line Printing Zone with main grid silver slurry and forms complete main gate line, and dry；D () sinters the solar battery sheet after described step (c) processes.On the one hand first in thin grid line Printing Zone, end, main gate line Printing Zone print thin grid silver and form complete thin grid line and the end of main gate line, overcome cell piece main grid, the shift phenomenon of thin grid junction；On the other hand the mid portion of main gate line is formed by the slurry printing of silver content less main grid silver, hence it is evident that reduces the silver slurry consumption of main gate line, reduces cell piece manufacturing cost.
Description
Technical field
The invention belongs to photovoltaic crystalline silicon area of solar cell, be specifically related to the printing process of a kind of front electrode of solar battery.
Background technology
At present, crystal silicon solar energy battery industrialization technology is the most highly developed, and silicon solar cell market tends to saturated, industry competition is more and more fierce, on the premise of how each company is for ensureing efficiency and the quality of silicon solar cell, farthest reducing its manufacturing cost and having carried out substantial amounts of research.In cell piece, the cost of printing cells silver slurry and half tone accounts for more than the 70% of whole cell piece manufacturing cost, so how on the premise of ensureing cell piece conversion efficiency, reduce the consumption of silver slurry and extend the half tone life-span, the manufacturing cost of cell piece can be reduced to a great extent.
The printing process of conventional cell piece front electrode is the mode printed together with thin grid are under same half tone, slurry of the same race by the main grid of front electrode.But for the front electrode of cell piece, the Main Function of main grid is transmission electric current and is easy to assembly series welding；The Main Function of thin grid is to collect photoelectric current, and the parameters such as the string resistance of cell piece, short circuit current, fill factor, curve factor are had a great impact, it can thus be appreciated that the silver slurry printing thin grid is starched than the silver of printing main grid and had higher requirement by the depth-width ratio of its printing and the density of silver slurry etc..Therefore, cell piece production cost is reduced in order to reduce the consumption of silver slurry, do not affect cell piece front electrode main grid to electric current transmission and assembly pulling force on the premise of, cell piece main grid and thin grid can be divided among under different half tone, slurry individually printing (thin grid routine positive silver paste；Main grid uses the silver slurry that silver content is relatively low, the unconventional front side silver paste that such as back silver paste and other relevant silver contents are relatively low), i.e. twice printing.
The Chinese invention patent of Application No. 201110436153.7 discloses twice printing process of a kind of cell piece front electrode, first by two blocks of supporting web plates, wherein, first piece of mesh-plate structure has complete grid line structure, includes some thin grid lines and some main gate line；And second block of web plate only has thin grid line structure, these two blocks of web plates are after accurate contraposition, it is ensured that the thin grid line of two blocks of web plates can coincide together；Then two blocks of web plates are fixed on printer according to correct locality and are used for printing, and then complete the steps such as drying, sintering.The method can solve " the camel peak " gone out shown by common printed mode, and the gate electrode line uniform ground obtained after twice printing, solves empty print problem.But the method must be by two pieces of web plate accurate contrapositions, otherwise easily there is shift phenomenon in cell piece main grid, thin grid junction, affect cell piece outward appearance.
Summary of the invention
The invention aims to overcome the deficiencies in the prior art to provide the printing process of a kind of solar battery sheet front electrode.
For reaching above-mentioned purpose, the technical solution used in the present invention is: the printing process of a kind of solar battery sheet front electrode, comprises the following steps:
A the half tone comprising some thin grid line Printing Zones and some main gate line Printing Zones is fixed on the printer by (), with sending into solar battery sheet in backward printer；
B thin grid silver slurry is respectively printed at described thin grid line Printing Zone by (), end, main gate line Printing Zone makes it form thin grid line, main gate line end on described solar battery sheet, with post-drying solar battery sheet；
C solar battery sheet after described drying is re-fed into printer by (), be printed on remaining main gate line Printing Zone with main grid silver slurry and form complete main gate line, and dry；
D () sinters the solar battery sheet after described step (c) processes.
Optimally, in described step (b), thin grid silver slurry is printed on crossing thin grid line Printing Zone and end, main gate line Printing Zone.
Optimally, in described step (c), first half tone is replaced with before solar battery sheet is sent into printer subregion, main gate line Printing Zone and arranges the half tone of overcover.
Optimally, in described thin grid silver slurry, the mass content of silver is 80% ~ 90%, and in described main grid silver slurry, the mass content of silver is 55% ~ 65%.
Optimally, drying temperature in described step (b) and step (c) is 120 DEG C ~ 220 DEG C, and drying time is 10 ~ 30 seconds.
Optimally, in described step (d), sintering temperature is 800 DEG C ~ 950 DEG C, sintering time is 50 ~ 120 seconds.
Owing to technique scheme is used, the present invention compared with prior art has the advantage that the printing process of solar battery sheet front electrode of the present invention, on the one hand first in thin grid line Printing Zone, end, main gate line Printing Zone prints thin grid silver and forms complete thin grid line and the end of main gate line, overcome cell piece main gate line, thin grid line combines the phenomenon of skew, extends half tone service life；On the other hand the mid portion of main gate line is formed by the slurry printing of silver content less main grid silver, hence it is evident that reduces the silver slurry consumption of main gate line, reduces cell piece manufacturing cost.
Accompanying drawing explanation
Accompanying drawing 1 be solar battery sheet front electrode of the present invention printing process in the patterning printed of step (b)；
Accompanying drawing 2 be solar battery sheet front electrode of the present invention printing process in the patterning printed of step (c).
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiment of the invention is described in detail:
The printing process of solar battery sheet front electrode of the present invention, concrete operations are:
The half tone first thin grid line to be printed with on solar battery sheet, main gate line matched is fixing on the printer, some thin grid line Printing Zones and some main gate line Printing Zones are distributed for forming the thin grid line of certain pattern form, main gate line, with backward printer is sent into solar battery sheet on web plate.
During printing, the printing of thin grid line and main gate line is divided into twice, the thinnest grid line of the most first printing and the two ends of main gate line, concrete operations are: thin grid silver slurry is respectively printed at thin grid line Printing Zone, the end of main gate line Printing Zone makes thin grid silver slurry form complete thin grid line and the both ends of main gate line on solar battery sheet, with post-drying solar battery sheet, the patterning of formation is as shown in Figure 1；Owing to the Main Function of thin grid is to collect photoelectric current, the parameters such as the string resistance of cell piece, short circuit current, fill factor, curve factor are had a great impact by the depth-width ratio of its printing and the density etc. of silver slurry, and the thin grid silver that silver slurry the most herein uses silver content to reach 80wt% ~ 90 wt% is starched.Second time is that the solar battery sheet after drying is re-fed into printer, it is printed on main gate line Printing Zone with main grid silver slurry, main grid silver slurry is made to form the middle part of main gate line on solar battery sheet, complete main gate line is connected into, with post-drying solar battery sheet with the main gate line both ends printed in previous step；Main grid primarily serves electric current transmission and the effect of components welding, as long as electric current transmitting and only need to ensure on the premise of assembly pulling force these two functions of main grid not affecting cell piece front electrode main grid, therefore in this step, silver slurry uses the main grid silver of silver content relatively low (being 55 wt% ~ 65 wt%) to starch.Finally the solar battery sheet after printing is sintered.So use the mode of two step printings first to print complete thin grid line and the both ends of main gate line, overcome cell piece main gate line, thin grid line combines the phenomenon of skew, extends half tone service life；And carefully grid silver slurry and main grid silver slurry can use the silver-colored slurry of different silver content, it is possible to the silver substantially reducing main gate line starches consumption, reduces cell piece manufacturing cost.
In the present embodiment, during the first impression, (will carefully grid silver starch be printed on crossing thin grid line Printing Zone and end, main gate line Printing Zone) be intersected in thin grid line Printing Zone, end, main gate line Printing Zone, thin grid line that printing formed and main gate line end so can be made to intersect, it is possible to improve the ability overcoming main gate line, thin grid line to combine skew further.The half tone used during the second printing can be different from the half tone used during the first impression, such as it is replaced with the half tone arranging overcover in subregion, main gate line Printing Zone, thus the main gate line printing generation can become patterning as shown in Figure 2, cloth hole between i.e. in main gate line, primarily to reduce the spreading area of main gate line, on the one hand can improve the transmitance of sunlight, be conducive to improving electricity conversion, on the other hand can save the consumption of silver slurry, reduce cost；And owing to more than 6 microns main grid thickness are satisfied by requirement, therefore this half tone thickness can design (6 ~ 8 microns are optimal) less than normal as far as possible, to reduce the following ink of printing main grid silver slurry, thus the printing consumption reducing silver slurry reached, reduce cost further.
In the present embodiment, drying temperature and be preferably 120 DEG C ~ 220 DEG C in step (b) and step (c), drying time is preferably 10 ~ 30 seconds.At in step (d), sintering temperature is preferably 800 DEG C ~ 950 DEG C, sintering time is preferably 50 ~ 120 seconds.Concrete stoving process and sintering process should be adjusted according to practical situation, such as during sintering, temperature is not to be constantly at 800 DEG C ~ 950 DEG C, but it being increased to sintering temperature by room temperature with certain heating rate, actual sintering time should comprise the heating-up time.
Above-described embodiment is only for technology design and the feature of the explanation present invention; its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this; can not limit the scope of the invention with this; all equivalence changes made according to spirit of the invention or modification, all should contain within protection scope of the present invention.
Claims (4)
1. the printing process of a solar battery sheet front electrode, it is characterised in that comprise the following steps:
A the half tone comprising some thin grid line Printing Zones and some main gate line Printing Zones is fixed on the printer by (), with sending into solar battery sheet in backward printer；
B thin grid silver slurry is respectively printed at described thin grid line Printing Zone by (), end, main gate line Printing Zone makes it form thin grid line, main gate line end on described solar battery sheet, and the described thin grid line making printing be formed intersects with described main gate line end, with post-drying solar battery sheet；
C half tone is replaced with subregion, main gate line Printing Zone and arranges the half tone of overcover by (), then the solar battery sheet after described drying is re-fed into printer, is printed on remaining main gate line Printing Zone with main grid silver slurry and forms complete main gate line, and dries；
D () sinters the solar battery sheet after described step (c) processes.
The printing process of solar battery sheet front electrode the most according to claim 1, it is characterised in that: in described thin grid silver slurry, the mass content of silver is 80% ~ 90%, and in described main grid silver slurry, the mass content of silver is 55% ~ 65%.
The printing process of solar battery sheet front electrode the most according to claim 1, it is characterised in that: drying temperature in described step (b) and step (c) is 120 DEG C ~ 220 DEG C, and drying time is 10 ~ 30 seconds.
The printing process of solar battery sheet front electrode the most according to claim 1, it is characterised in that: in described step (d), sintering temperature is 800 DEG C ~ 950 DEG C, sintering time is 50 ~ 120 seconds.
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| CN201410383606.8A CN104129183B (en) | 2014-08-06 | 2014-08-06 | A kind of printing process of solar battery sheet front electrode |
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| CN201410383606.8A CN104129183B (en) | 2014-08-06 | 2014-08-06 | A kind of printing process of solar battery sheet front electrode |
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| CN104129183B true CN104129183B (en) | 2016-08-17 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106142822A (en) * | 2015-04-22 | 2016-11-23 | 江苏正能电子科技有限公司 | A kind of solar silicon wafers just silver Printing screen |
| CN104882497A (en) * | 2015-06-05 | 2015-09-02 | 中利腾晖光伏科技有限公司 | Grid-shaped electrode solar cell |
| CN106206821A (en) * | 2016-08-30 | 2016-12-07 | 通威太阳能（合肥）有限公司 | A kind of twice print structure reducing shading lifting depth-width ratio |
| CN107039099B (en) * | 2017-03-10 | 2019-09-27 | 宜兴市昱元能源装备技术开发有限公司 | A kind of Novel conductive paste and the method for preparing solar battery sheet main gate line with it |
| CN108493265A (en) * | 2018-03-21 | 2018-09-04 | 青海黄河上游水电开发有限责任公司光伏产业技术分公司 | A kind of back electrode halftone and dereliction grid solar cell piece |
| CN110544726A (en) * | 2019-07-24 | 2019-12-06 | 浙江利博能源有限公司 | polycrystalline silicon solar cell with high photoelectric conversion efficiency and preparation method thereof |
| CN114914326A (en) * | 2021-02-09 | 2022-08-16 | 环晟光伏(江苏)有限公司 | Laser sintering method for solar cell |
| CN113140646B (en) * | 2021-04-23 | 2024-05-07 | 南通天盛新能源股份有限公司 | Solar cell P region grid line structure, preparation method thereof and solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4121928B2 (en) * | 2003-10-08 | 2008-07-23 | シャープ株式会社 | Manufacturing method of solar cell |
| JP5488015B2 (en) * | 2009-02-10 | 2014-05-14 | 信越化学工業株式会社 | Screen printing method |
| FR2943947B1 (en) * | 2009-04-06 | 2011-12-16 | Commissariat Energie Atomique | METHOD FOR PRINTING USING A DRIVER IN TWO SUPERIMPOSED LAYERS |
| CN102145602A (en) * | 2010-11-19 | 2011-08-10 | 山东力诺太阳能电力股份有限公司 | Printing registration method for crystalline silicon selective emitter battery |
| CN102270696A (en) * | 2011-05-30 | 2011-12-07 | 合肥海润光伏科技有限公司 | Front electrode secondary overprinting process |
| CN103171253A (en) * | 2011-12-23 | 2013-06-26 | 昆山允升吉光电科技有限公司 | Matching metal solar screen for multi-time printing and use method thereof |
| CN202428770U (en) * | 2011-12-23 | 2012-09-12 | 昆山允升吉光电科技有限公司 | Matched screen plate for solar energy battery electrode |
| CN102555562A (en) * | 2011-12-28 | 2012-07-11 | 晶澳（扬州）太阳能科技有限公司 | Printing process of solar battery plate |
| CN202839626U (en) * | 2012-07-25 | 2013-03-27 | 浙江贝盛光伏股份有限公司 | Grid lines of solar cell slice |
| CN103022167A (en) * | 2012-09-27 | 2013-04-03 | 奥特斯维能源（太仓）有限公司 | Electroforming screen printing plate grid line for solar battery |
| CN103144453A (en) * | 2012-11-23 | 2013-06-12 | 中利腾晖光伏科技有限公司 | Split type battery film printing method and equipment |
| CN203317862U (en) * | 2013-05-31 | 2013-12-04 | 中利腾晖光伏科技有限公司 | Gate line printing unit |
| CN103252983B (en) * | 2013-05-31 | 2016-02-03 | 中利腾晖光伏科技有限公司 | A kind of grid line printing equipment |
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Address after: 215542 Jiangsu city of Suzhou province Changshou City Shajiabang Changkun Industrial Park Teng Hui Road No. 1 Patentee after: Suzhou Tenghui Photovoltaic Technology Co., Ltd. Address before: 215542 Jiangsu city of Suzhou province Changshu Shajiabang Changkun Industrial Park Teng Hui Road No. 1 Patentee before: Zhongli Talesun Solar Technology Co., Ltd. |
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Effective date of registration: 20211026 Address after: 223800 No. 211, Zhongxing East Road, economic development zone, Siyang County, Suqian City, Jiangsu Province Patentee after: Siyang Tenghui photoelectric Co.,Ltd. Patentee after: SUZHOU TALESUN SOLAR TECHNOLOGIES Co.,Ltd. Address before: 215542 No.1, Tenghui Road, Changkun Industrial Park, Shajiabang, Changshu City, Suzhou City, Jiangsu Province Patentee before: SUZHOU TALESUN SOLAR TECHNOLOGIES Co.,Ltd. |
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