CN103066151B - A kind of manufacture method of back contact solar cell string - Google Patents
A kind of manufacture method of back contact solar cell string Download PDFInfo
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- CN103066151B CN103066151B CN201210505089.8A CN201210505089A CN103066151B CN 103066151 B CN103066151 B CN 103066151B CN 201210505089 A CN201210505089 A CN 201210505089A CN 103066151 B CN103066151 B CN 103066151B
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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
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- 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 discloses a kind of manufacture method of back contact solar cell string, the gauze that the present invention's straight line welding stretches tight is by multiple welding of battery film bunchiness.Cell piece back side positive and negative electrode is arranged in a linear, apart from one another by, two row positive and negative electrode spacing of arbitrary neighborhood are equal, and the electrode pattern on adjacent cell sheet is identical.The opposite electrode of adjacent cell sheet is welded on same welding, does not need to rotate cell piece.After welding, odd number root between adjacent cell sheet or even number root bead band are cut off, realizes the series connection of adjacent cell sheet.Speed of welding of the present invention is fast, and precision is high, the number of welding can be increased greatly, the electrode number of corresponding increase cell piece.Increase electrode density, reduce fragment to the impact of assembly property, solve back contact solar cell interconnection problems innovatively, have the significance promoting photovoltaic industry technological leapfrogging.The present invention's technological process compared with other welding technology is simple, is easy to reduce fragment and realize automation.
Description
Technical field
The present invention relates to a kind of manufacture method of back contact solar cell string, low cost can realize the making of back contact solar cell string.Belong to photovoltaic field.
Background technology
Solar energy resources is abundant, widely distributed, is the most potential regenerative resource.Along with global energy shortage and the problem such as environmental pollution become increasingly conspicuous, solar energy power generating because of its clean, safety, facility, the feature such as efficient, the new industry having become countries in the world common concern and given priority to.In this context, photovoltaic industry increases swift and violent in recent years, and industry size constantly expands, product cost continuous decrease.Expect 2015, domestic photovoltaic installed capacity target will reach 10GW, at least will reach 50GW to the year two thousand twenty.
Back contact solar cell technology not only can reduce front electrode shading, and can reduce the series resistance loss of assembly by improving packaging technology.It is the high-efficiency battery technology being hopeful to reduce battery cost most, domestic existing Aunar this, the company such as martial prowess new forms of energy in batch production back contact battery, other companies are as Trina Solar, and Ying Li group is also at active development.
The series welding technique of published back contact battery mainly contains 3 kinds:
1. the conductive backings technology of Dutch ECN and Eurotron company joint development, cell piece is connected in the conductive backings of positive and negative electrode figure, the shortcoming of this technology be conductive backings and conducting resinl cost high, with existing subassembly line poor compatibility, although technical development for many years, in actual production, application development is slow.
2. straight line welding back contact battery method for packing disclosed in Chinese patent 201210128654.3, positive electrode row and negative electrode arrange about battery center axial symmetry, during encapsulation, adjacent cell sheet is planar revolved turnback, then by straight line welding, the both positive and negative polarity of adjacent cell is connected.The shortcoming of this technology is that requirement positive and negative electrode is symmetrical, destroys the equally distributed principle of electrode, is unfavorable for the collection of electric current; Secondly, adjacent cell sheet revolves the probability that turnback can increase fragment, and improves the difficulty of automation.
3. the method for the disclosed adjacent back contact battery of connecting with broken line or shaped form welding of Chinese patent 201210188615.2, need not revolve turnback by cell piece during series welding; Broken line or curve welding are produced by the mode of punching, compared with the straight line welding produced by calendering technology, the flatness of broken line or curve welding reduces, and the shortcoming of this technology easily causes battery fragment, cause cell piece mismatch in assembly, power declines to a great extent.
Summary of the invention
For the deficiency that prior art exists, the object of the invention is to provide the manufacture method of the back contact solar cell string that a kind of cost is low, technological process is simple, speed of welding is fast and positional precision is high.
To achieve these goals, the present invention realizes by the following technical solutions:
The present invention includes following step:
Step (a): many root beads band two ends are fixed and tightened, parallel to each other between welding, form welding gauze;
Step (b): the multi-disc cell piece printed is aimed at welding gauze successively, contacts, added thermal weld, the opposite electrode on adjacent cell sheet is welded on same welding; Do not need to rotate cell piece.
Step (c): cut off the odd/even root bead band between adjacent cell sheet, thus the battery strings forming series connection mutually; Realize the series connection of adjacent cell sheet.
Above-mentioned welding radical equals total electrode columns summation and deducts 1, and the spacing between welding is equal with the column pitch of cell piece top electrode.
Above-mentioned welding is coated with insulating varnish.
What above-mentioned insulating varnish specifically adopted is directly weld type insulating varnish.
The insulating varnish of above-mentioned welding bond pad locations is peeled off especially by stripping paint device.
Above-mentioned welding gauze with adopt between cell piece infraredly to weld, hot air welding or laser welding.
Welding between above-mentioned cell piece adopts laser cutting, plasma-torch cutting or machine cuts.
Speed of welding of the present invention is fast, and precision is high, the number of welding can be increased greatly, and the electrode number of corresponding increase cell piece, can reduce ohmic loss, improves component power, reduces the consumption of noble silver simultaneously, reduces assembly cost.Increase electrode density, reduce fragment to the impact of assembly property, solve back contact solar cell interconnection problems innovatively, have the significance promoting photovoltaic industry technological leapfrogging.The present invention's technological process compared with other welding technology is simple, without the need to single weldering, upset, series welding, revolves the action of turnback, is easy to reduce fragment and realize automation.
Accompanying drawing explanation
Fig. 1 is the cell piece back side of the present invention structural representation;
Fig. 2 is the battery strings structural representation after the present invention welds;
Fig. 3 is the battery strings structural representation after the present invention shears.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
The shape difference of battery electrode and the width difference of welding are only the processing step that this patent is described, do not represent that actual shape and width there are differences.This patent is applicable to P type back contact solar cell and N-type back contact solar cell, and specific embodiment only illustrates patent of the present invention for P type back contact solar cell.
The present invention specifically comprises the following steps:
Step (a):
See Fig. 1, the positive electrode 2 and negative electrode 3 of cell piece 1 print soldering solder simultaneously, the print thickness of solder is 10-50um.In order to the graph position of the graph position and electrode that make solder overlaps, when cell piece manufactures, alignment fiducials point need be reserved in the back side, and uses the printing machine of band vision alignment function, and alignment precision is within 100um.The positive and negative electrode columns at the cell piece back side is determined according to actual conditions.
See Fig. 2, odd number root bead band 4 and even number root bead band 5 two ends are fixed, and welding is tightened, make welding formation gauze parallel to each other.Back contact battery positive and negative electrode linearly distributes, spaced.Welding radical equals positive and negative electrode columns summation and deducts 1.The spacing of welding is equal with the column pitch of cell piece 1 top electrode, in order to avoid the metal conducting layer contact short circuit on welding and cell piece, welding is coated with insulating lacquer layer, and the thickness of insulating lacquer layer is 20-60um.The selectable width of welding selects 0.1mm-3mm.Insulating lacquer layer can adopt the insulating lacquer layer of straight weldering type insulating lacquer layer or welding bond pad locations to be peeled off by stripping paint device.
Step (b):
The battery printed by first is aimed at welding gauze, and contact, adds thermal weld.Reserve last row electrode and do not weld welding, 1-5 second weld time.For avoiding high temperature battery, welding temperature should be less than 500 ° of C.If insulating lacquer layer is not adopt straight weldering type insulating lacquer layer, before welding welding need the insulating varnish of bond pad locations to peel off.
With reference to figure 2, aimed at by second battery printed with welding gauze, contact, adds thermal weld.Reserve first row electrode and do not weld welding, the negative electrode of the positive electrode of second battery and first battery is welded on same welding.Do not need to rotate cell piece.
With reference to figure 2, aimed at by the 3rd battery printed with welding gauze, contact, adds thermal weld.Reserve last row electrode and do not weld welding, the positive electrode of the 3rd battery and the negative electrode of second battery are welded on same welding.Do not need to rotate cell piece.
All the other cell pieces are welded with same method.
Step (c):
With reference to figure 3, cut off the odd/even root bead band 6 between first battery and second battery, cut off the even/odd root bead band 7 between second battery and the 3rd battery.The both positive and negative polarity of adjacent cell is connected, forms the structure of series connection.
Cut off all the other weldings with same method, form the battery strings of series connection mutually, realize the series connection of cell piece fast.
During use, battery strings is laid on the glass of covering EVA, welding convergent belt, then covers upper strata EVA and back veneer material, heated lamination, compatible strong with conventional production lines.
Speed of welding of the present invention is fast, and precision is high, the number of welding can be increased greatly, and the electrode number of corresponding increase cell piece, can reduce ohmic loss, improves component power, reduces the consumption of noble silver simultaneously, reduces assembly cost.Increase electrode density, reduce fragment to the impact of assembly property, solve back contact solar cell interconnection problems innovatively, have the significance promoting photovoltaic industry technological leapfrogging.The present invention's technological process compared with other welding technology is simple, without the need to single weldering, upset, series welding, revolves the action of turnback, is easy to reduce fragment and realize automation.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (7)
1. a manufacture method for back contact solar cell string, is characterized in that, comprises following step:
Step (a): many root beads band two ends are fixed and tightened, parallel to each other between described welding, form welding gauze;
Step (b): the multi-disc cell piece printed is aimed at welding gauze successively, contacts, added thermal weld, the opposite electrode on adjacent cell sheet is welded on same welding;
Step (c): cut off the odd/even root bead band between adjacent cell sheet, thus the battery strings forming series connection mutually.
2. the manufacture method of back contact solar cell string according to claim 1, is characterized in that, described welding radical equals total electrode columns summation and deducts 1, and the spacing between described welding is equal with the column pitch of cell piece top electrode.
3. the manufacture method of back contact solar cell string according to claim 1, is characterized in that, described welding is coated with insulating varnish.
4. the manufacture method of back contact solar cell string according to claim 3, is characterized in that, what described insulating varnish specifically adopted is directly weld type insulating varnish.
5. the manufacture method of back contact solar cell string according to claim 3, is characterized in that, the insulating varnish of described welding bond pad locations is peeled off especially by stripping paint device.
6. the manufacture method of back contact solar cell string according to claim 1, is characterized in that, described welding gauze with adopt between cell piece infraredly to weld, hot air welding or laser welding.
7. the manufacture method of back contact solar cell string according to claim 1, is characterized in that, the welding between described cell piece adopts laser cutting, plasma-torch cutting or machine cuts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210505089.8A CN103066151B (en) | 2012-11-30 | 2012-11-30 | A kind of manufacture method of back contact solar cell string |
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| CN201210505089.8A CN103066151B (en) | 2012-11-30 | 2012-11-30 | A kind of manufacture method of back contact solar cell string |
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| CN103066151B true CN103066151B (en) | 2015-11-25 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236448A (en) * | 2013-05-02 | 2013-08-07 | 英利能源（中国）有限公司 | Back contact battery photovoltaic assembly and production method thereof |
| CN104858516A (en) * | 2015-05-12 | 2015-08-26 | 武汉开锐智能设备有限公司 | Solar cell welding technique |
| ITUB20152112A1 (en) * | 2015-07-13 | 2017-01-13 | Vismunda Srl | MWT PHOTOVOLTAIC CELL FOR DEDICATED CONDUCTIVE BACKSHEET. |
| CN105336801A (en) * | 2015-12-23 | 2016-02-17 | 嘉兴市瑞诚电子科技有限公司 | High-efficiency light back electrode gain photovoltaic module and production process thereof |
| TWI590475B (en) | 2016-06-17 | 2017-07-01 | 財團法人工業技術研究院 | Tandem solar cell module |
| CN107359216A (en) * | 2017-06-29 | 2017-11-17 | 中节能太阳能科技（镇江）有限公司 | Solar cell module welding, the battery strings and manufacture method connected by welding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544167A (en) * | 2012-02-24 | 2012-07-04 | 上饶光电高科技有限公司 | MWT (Metal Wrap-Through) solar cell assembly and manufacturing method thereof |
| CN102646728A (en) * | 2012-05-02 | 2012-08-22 | 苏州阿特斯阳光电力科技有限公司 | Back electrode structure of back contact silicon solar cell panel and manufacture method thereof |
| CN102723380A (en) * | 2012-06-08 | 2012-10-10 | 苏州阿特斯阳光电力科技有限公司 | Back-contact solar cell module |
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| JP2005340362A (en) * | 2004-05-25 | 2005-12-08 | Sharp Corp | Solar cell and solar cell module |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544167A (en) * | 2012-02-24 | 2012-07-04 | 上饶光电高科技有限公司 | MWT (Metal Wrap-Through) solar cell assembly and manufacturing method thereof |
| CN102646728A (en) * | 2012-05-02 | 2012-08-22 | 苏州阿特斯阳光电力科技有限公司 | Back electrode structure of back contact silicon solar cell panel and manufacture method thereof |
| CN102723380A (en) * | 2012-06-08 | 2012-10-10 | 苏州阿特斯阳光电力科技有限公司 | Back-contact solar cell module |
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Effective date of registration: 20201116 Address after: Group 36, Liuwei village, Qutang Town, Hai'an City, Nantong City, Jiangsu Province, 226100 Patentee after: Nantong siqigao Furniture Co.,Ltd. Address before: 210012 Jiangsu city of Nanjing province Yuhuatai read City International Garden Patentee before: Gong Changmeng |
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Effective date of registration: 20230323 Address after: 226661 group 36, Liuwei village, Qutang Town, Hai'an City, Nantong City, Jiangsu Province Patentee after: Nantong Hairuizhi New Information Technology Co.,Ltd. Address before: 226100 group 36, Liuwei village, Qutang Town, Hai'an City, Nantong City, Jiangsu Province Patentee before: Nantong siqigao Furniture Co.,Ltd. |