CN104129183A - Method of printing obverse-side electrode of solar battery piece - Google Patents
Method of printing obverse-side electrode of solar battery piece Download PDFInfo
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- CN104129183A CN104129183A CN201410383606.8A CN201410383606A CN104129183A CN 104129183 A CN104129183 A CN 104129183A CN 201410383606 A CN201410383606 A CN 201410383606A CN 104129183 A CN104129183 A CN 104129183A
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- solar battery
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- printing
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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 invention relates to a method of printing an obverse-side electrode of a solar battery piece. The method comprises the following steps that (a) a screen printing plate containing a plurality of thin grid line printing areas and a plurality of main grid line printing areas is fixed to a printing machine; (b) fine grid silver paste is printed on the thin grid line printing areas and the ends of the main grid line printing areas so that the thin grid lines and the ends of main grid lines can be formed on the solar battery piece, and then the solar battery piece is dried; (c) main grid silver paste is printed on the rest of the main grid line printing areas so that the complete main grid lines can be formed, and then drying is conducted; (4) the solar battery piece processed through the step (c) is sintered. On one hand, the complete thin grid lines and the ends of the main grid lines are formed by printing the thin grid silver paste on the thin grid line printing areas and the ends of the main grid line printing areas, so that the phenomenon that the joints of main grids and thin grids of the solar battery piece deviate is avoided; on the other hand, the middles of the main grid lines are formed by printing the main grid silver paste containing a small amount of silver, so that the amount of silver consumed by the main grid lines is reduced remarkably, and the manufacturing cost of the solar battery piece is reduced.
Description
Technical field
The invention belongs to photovoltaic crystalline silicon area of solar cell, be specifically related to a kind of printing process of front electrode of solar battery.
Background technology
At present, crystal silicon solar energy battery industrialization technology is very ripe, and silicon solar cell market is tending towards saturated, industry competition is more and more fierce, each company for how to ensure, under the efficiency of silicon solar cell and the prerequisite of quality, farthest reduces its manufacturing cost and has carried out a large amount of research.In cell piece, the cost of printing cells silver slurry and half tone accounts for the more than 70% of whole cell piece manufacturing cost, so how to ensure under the prerequisite of cell piece conversion efficiency, reduce the consumption of silver slurry and extend the half tone life-span, can reduce to a great extent the manufacturing cost of cell piece.
The printing process of conventional cell piece front electrode is by the mode of the main grid of front electrode printing together with thin grid are under same half tone, slurry of the same race.But for the front electrode of cell piece, the Main Function of main grid is transmission current and is convenient to assembly series welding; The Main Function of thin grid is to collect photoelectric current, the parameters such as the string resistance to cell piece such as the density of the depth-width ratio of its printing and silver slurry, short circuit current, fill factor, curve factor have a great impact, and the silver slurry of hence one can see that thin grid of printing has higher requirement than the silver slurry of printing main grid.Therefore, for thereby the consumption that reduces silver slurry reduces cell piece production cost, do not affect cell piece front electrode main grid to the prerequisite of current delivery and assembly pulling force under, can be by cell piece main grid and separately (the thin conventional positive silver paste of grid of printing separately under different half tones, slurry of thin grid; Main grid uses the silver slurry that silver content is lower, for example back silver paste and the lower unconventional front side silver paste of other relevant silver contents), i.e. twice printing.
Application number is twice printing process that 201110436153.7 Chinese invention patent discloses a kind of cell piece front electrode, first use two blocks of supporting web plates, wherein, first mesh-plate structure has complete grid line structure, includes some thin grid lines and some main grid lines; And second block of web plate only has thin grid line structure, these two blocks of web plates, after accurate contraposition, can ensure that the thin grid line of two blocks of web plates can coincide together; Then two blocks of web plates are fixed on printing machine for printing according to correct locality, and then complete the steps such as oven dry, sintering.The method can solve common printed mode shown go out " camel peak ", and the gate electrode line obtaining after twice printing is evenly smooth, has solved empty seal problem.But the method must be by two web plate accurate contrapositions, otherwise easily there is shift phenomenon in cell piece main grid, thin grid junction, affects cell piece outward appearance.
Summary of the invention
The present invention seeks to provide in order to overcome the deficiencies in the prior art a kind of printing process of solar battery sheet front electrode.
For achieving the above object, the technical solution used in the present invention is: a kind of printing process of solar battery sheet front electrode, comprises the following steps:
(a) half tone that comprises some thin grid line Printing Zones and some main grid line Printing Zones is fixed on printing machine, with sending into solar battery sheet in backward printing machine;
(b) thin grid silver slurry is printed on respectively to described thin grid line Printing Zone, end, main grid line Printing Zone makes it on described solar battery sheet, form thin grid line, main grid thread end, with post-drying solar battery sheet;
(c) solar battery sheet after described oven dry is sent into printing machine again, be printed on remaining main grid line Printing Zone with main grid silver slurry and form complete main grid line, and dry;
(d) step (c) solar battery sheet after treatment described in sintering.
Optimally, in described step (b), thin grid silver slurry is printed on to crossing thin grid line Printing Zone and end, main grid line Printing Zone.
Optimally, in described step (c), solar battery sheet is sent into the half tone that first half tone is replaced with to subregion, main grid line Printing Zone before printing machine and arranges 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, in described step (b) and step (c), bake out temperature is 120 DEG C ~ 220 DEG C, and drying time is 10 ~ 30 seconds.
Optimally, in described step (d), sintering temperature is at 800 DEG C ~ 950 DEG C, and sintering time is 50 ~ 120 seconds.
Because technique scheme is used, the present invention compared with prior art has following advantages: the printing process of solar battery sheet front electrode of the present invention, first print on the one hand thin grid silver in thin grid line Printing Zone, end, main grid line Printing Zone and form complete thin grid line and the end of main grid line, overcome cell piece main grid line, the thin grid line phenomenon in conjunction with skew, extended half tone service life; The mid portion of main grid line is formed by the less main grid silver slurry printing of silver content on the other hand, obviously reduces the silver slurry consumption of main grid line, reduces cell piece manufacturing cost.
Brief description of the drawings
The patterning that in the printing process that accompanying drawing 1 is solar battery sheet front electrode of the present invention, step (b) is printed;
The patterning that in the printing process that accompanying drawing 2 is solar battery sheet front electrode of the present invention, step (c) is printed.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiment of the invention is elaborated:
The printing process of solar battery sheet front electrode of the present invention, concrete operations are:
First by with solar battery sheet on the half tone that matches of thin grid line to be printed, main grid line be fixed on printing machine, on web plate, be distributed with thin grid line, main grid line that some thin grid line Printing Zones and some main grid line Printing Zones are used to form certain pattern form, with sending into solar battery sheet in backward printing machine.
When printing, the printing of thin grid line and main grid line is divided into twice, the two ends of all thin grid line of first printing and main grid line for the first time, concrete operations are: the end that thin grid silver slurry is printed on respectively to thin grid line Printing Zone, main grid line Printing Zone makes thin grid silver slurry on solar battery sheet, form the both ends of complete thin grid line and main grid line, with post-drying solar battery sheet, the patterning of formation as shown in Figure 1; Because the Main Function of thin grid is to collect photoelectric current, the parameters such as the string resistance to cell piece such as the density of the depth-width ratio of its printing and silver slurry, short circuit current, fill factor, curve factor have a great impact, and therefore silver slurry herein adopts silver content to reach the thin grid silver slurry of 80wt% ~ 90 wt%.That the solar battery sheet after drying is sent into printing machine more for the second time, starch and be printed on main grid line Printing Zone with main grid silver, make main grid silver slurry on solar battery sheet, form the middle part of main grid line, connect into complete main grid line with the main grid line both ends that print in previous step, with post-drying solar battery sheet; Main grid mainly plays the effect of current delivery and components welding, as long as do not affecting cell piece front electrode main grid and only need to ensure under to the prerequisite of current delivery and assembly pulling force these two functions of main grid, therefore in this step, silver slurry adopts silver-colored slurry of main grid of silver content lower (being 55 wt% ~ 65 wt%).Finally the solar battery sheet after printing is carried out to sintering processes.The both ends that adopt the mode of two step printings first to print complete thin grid line and main grid line like this, have overcome cell piece main grid line, the thin grid line phenomenon in conjunction with skew, have extended half tone service life; And thin grid silver is starched and main grid silver slurry can adopt the silver of different silver contents to starch, can obviously reduce the silver slurry consumption of main grid line, reduce cell piece manufacturing cost.
In the present embodiment, when the first printing, (being printed on crossing thin grid line Printing Zone and end, main grid line Printing Zone by thin grid silver slurry) intersected in thin grid line Printing Zone, end, main grid line Printing Zone, can make like this thin grid line and main grid thread end that printing forms intersect, can further improve and overcome main grid line, thin grid line in conjunction with the ability being offset.The half tone that the half tone adopting when the second printing adopts can be from the first printing time is different, for example be replaced with the half tone of arranging overcover in subregion, main grid line Printing Zone, thereby the main grid line that printing produces can become patterning as shown in Figure 2, be to be furnished with hole between on main grid line, be mainly the spreading area in order to reduce main grid line, can improve on the one hand the transmitance of sunlight, be conducive to improve electricity conversion, consumption that on the other hand can saving silver paste, reduces costs; And because more than 6 microns main grid thickness all meets the demands, therefore this half tone thickness can design (about 6 ~ 8 microns best) less than normal as far as possible, to reduce the following ink of printing main grid silver slurry, thereby the printing consumption of the reduction reaching silver slurry further reduces costs.
In the present embodiment, in step (b) and step (c), bake out temperature is preferably 120 DEG C ~ 220 DEG C, and drying time is preferably 10 ~ 30 seconds.In step (d), sintering temperature is preferably at 800 DEG C ~ 950 DEG C, and sintering time is preferably 50 ~ 120 seconds.Concrete stoving process and sintering process should regulate according to actual conditions, for example temperature is not always at 800 DEG C ~ 950 DEG C when sintering, but 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 explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. a printing process for solar battery sheet front electrode, is characterized in that, comprises the following steps:
(a) half tone that comprises some thin grid line Printing Zones and some main grid line Printing Zones is fixed on printing machine, with sending into solar battery sheet in backward printing machine;
(b) thin grid silver slurry is printed on respectively to described thin grid line Printing Zone, end, main grid line Printing Zone makes it on described solar battery sheet, form thin grid line, main grid thread end, with post-drying solar battery sheet;
(c) solar battery sheet after described oven dry is sent into printing machine again, be printed on remaining main grid line Printing Zone with main grid silver slurry and form complete main grid line, and dry;
(d) step (c) solar battery sheet after treatment described in sintering.
2. the printing process of solar battery sheet front electrode according to claim 1, is characterized in that: in described step (b), thin grid silver slurry is printed on to crossing thin grid line Printing Zone and end, main grid line Printing Zone.
3. the printing process of solar battery sheet front electrode according to claim 1, is characterized in that: in described step (c), solar battery sheet is sent into the half tone that first half tone is replaced with to subregion, main grid line Printing Zone before printing machine and arranges overcover.
4. the printing process of solar battery sheet front electrode according to claim 1, is characterized 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%.
5. the printing process of solar battery sheet front electrode according to claim 1, is characterized in that: in described step (b) and step (c), bake out temperature is 120 DEG C ~ 220 DEG C, and drying time is 10 ~ 30 seconds.
6. the printing process of solar battery sheet front electrode according to claim 1, is characterized in that: in described step (d), sintering temperature is at 800 DEG C ~ 950 DEG C, and 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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| CN104129183A true CN104129183A (en) | 2014-11-05 |
| CN104129183B CN104129183B (en) | 2016-08-17 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| CN107039099A (en) * | 2017-03-10 | 2017-08-11 | 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 that solar battery sheet main gate line is prepared 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 |
| CN113140646A (en) * | 2021-04-23 | 2021-07-20 | 南通天晟新能源科技有限公司 | Solar cell P region grid line structure, preparation method thereof and solar cell |
| CN114914326A (en) * | 2021-02-09 | 2022-08-16 | 环晟光伏(江苏)有限公司 | Laser sintering method for solar cell |
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| 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 |
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| 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 |
| CN107039099A (en) * | 2017-03-10 | 2017-08-11 | 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 that solar battery sheet main gate line is prepared with it |
| 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 |
| CN113140646A (en) * | 2021-04-23 | 2021-07-20 | 南通天晟新能源科技有限公司 | Solar cell P region grid line structure, preparation method thereof and 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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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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