CN103022204A - Novel back contacting photovoltaic assembly solder strip and manufacture method thereof - Google Patents
Novel back contacting photovoltaic assembly solder strip and manufacture method thereof Download PDFInfo
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- CN103022204A CN103022204A CN2012105333967A CN201210533396A CN103022204A CN 103022204 A CN103022204 A CN 103022204A CN 2012105333967 A CN2012105333967 A CN 2012105333967A CN 201210533396 A CN201210533396 A CN 201210533396A CN 103022204 A CN103022204 A CN 103022204A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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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 novel back contacting photovoltaic assembly solder strip. The solder strip uses a copper core as a base material. A soldering alloy layer is respectively covered on the upper surface and the lower surface of the copper core, and an insulation paint layer is covered on the lower surface of the copper core. According to a back contacting battery electrode pattern, corresponding soldering contact points on the solder strip are hollow, and vertical through holes for locating and soldering the solder strip and soldering points are formed on the solder strip. A manufacture method of the novel back contacting photovoltaic assembly solder strip includes that copper foil with purity larger than 99.999% is prepared, and the thickness of the copper foil is 20-250 mum; the copper foil is cut into copper strips with the width ranging from 1mm to 3 cm; temperature of the copper foil is kept for 1 to 10 minutes, and the copper foil is cooled; the copper foil is soaked in a soldering alloy pool and cooled; the insulation paint layer is coated on the lower surface of the solder strip; and small holes are machined on the solder strip. Back contacting batteries are connected in series through a method similar to a conventional soldering method, the cost is low, the solder strip is high in matching degree with the existing production line process, and large-scale production of the solder strip is easy to achieve.
Description
Technical field
The present invention relates to a kind of Novel back contact photovoltaic module with welding and preparation method thereof, belong to the solar photovoltaic assembly technical field.
Background technology
The welding that conventional photovoltaic module is used is take the copper core as base material, leypewter layer in the upper and lower surface hot-dip of base material.About 360 ℃ welding one end is being welded on the negative pole main grid of solar battery sheet upper surface, an other end is welded on the anodal main grid of adjacent cell sheet lower surface, thereby forms the series connection of cell piece.
And on back of the body contact battery, the both positive and negative polarity of battery all is distributed in the lower surface (back side) of cell piece, and particularly both positive and negative polarity is interspersed often at the back side of cell piece.If continue again to use conventional welding this moment, thereby or can make the short circuit of cell piece both positive and negative polarity that cell piece was lost efficacy.
For back of the body contact cell photovoltaic assembly, a kind of conductive backings technology is arranged at present, this kind technology combines the encapsulation that realizes assembly with the welding circuit of photovoltaic module and the backboard of assembly, and the assembly outward appearance that this kind technology prepares is beautiful, and performance is high.But its cost is very high in present stage, must use full automatic subassembly line, and integrated cost can't be competed with prior art, does not also widely apply at present.
Summary of the invention
The objective of the invention is: for back contact solar cell photovoltaic module above shortcomings in the prior art, provide a kind of new welding structure and preparation method thereof, and the using method of this welding in back of the body contact photovoltaic module.
Technical scheme of the present invention is:
A kind of Novel back contact photovoltaic module welding strip, its structure is: take the copper core as base material, at the upper and lower surface covering last layer welding alloy layer of copper core, at the lower surface covering last layer insulation enamelled coating of copper core; According to back of the body contact battery electrode figure, the welding contacting points position part hollow out of correspondence on welding is at the hole of welding formation up/down perforation.
As a further improvement on the present invention, the welding alloy composition of layer of welding can be leaded ashbury metal, or the ashbury metal of leaded, silver-colored ashbury metal or bismuth-containing.
As a further improvement on the present invention, the insulating varnish composition of layer of welding contains expandability polyethylene or thermoplastic elastomer (TPE) or polyvinyl fluoride or silica-base material.
As a further improvement on the present invention, the insulation enamelled coating of welding can break away from and is attached to back of the body contact battery lower surface in welding.
As a further improvement on the present invention, the position of welding hole is confirmed according to the electrode pattern that the back of the body contacts battery with size.The hole diameter size is 0.5mm to 4mm, and number is 1 to 100.
As a further improvement on the present invention, the effect of described hole is for welding and pad location, and welds usedly, and other technologies worker can be according to other figures of this welding principle design.
A kind of Novel back contact photovoltaic module welding strip, its preparation method is:
1) prepare purity greater than 99.999% Copper Foil, thickness is 20 μ m to 250 μ m;
2) Copper Foil is cut into the wide copper bar of 1mm to 3cm;
3) Copper Foil being incubated 1 to 10 minute under 560 ℃ to 750 ℃ temperature also cools off;
4) Copper Foil is immersed in the welding alloy pond, temperature determines that by the welding alloy composition time was 1 to 30 second, cooling;
5) apply the insulation enamelled coating at the welding lower surface;
6) according to the battery electrode figure, suitable machining small hole, position on welding.Namely get required welding.
As a further improvement on the present invention, the hole processing method can be machining, Laser cutting, chemical corrosion processing.
The invention has the beneficial effects as follows: adopt similar normal welding method will carry on the back the contact battery and be together in series, cost is lower, and is higher with the existing Wiring technology matching degree of producing, and is easy to realize large-scale production.
Description of drawings
Fig. 1 is the generalized section of welding of the present invention;
Fig. 2 is the schematic top plan view of welding of the present invention.
Among the figure: 1, copper core; 2, welding alloy layer; 3, insulation enamelled coating; 4, hole; 5, welding.
Embodiment
Following examples are implemented under take technical solution of the present invention as prerequisite, have provided detailed execution mode and process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
When applying the present invention to carry on the back contact assembly and preparing, operating procedure is as follows:
1, prepare purity greater than 99.999% Copper Foil, thickness is 100 μ m;
2, Copper Foil is cut into the wide copper bar of 1cm;
3, Copper Foil being incubated 10 minutes under 600 ℃ temperature also cools off;
4, Copper Foil is immersed in Sn
60Pb
40The welding alloy pond, temperature determines that by the welding alloy composition time was 2 seconds, cooling;
5, apply polyvinyl fluoride insulation enamelled coating at the welding lower surface;
6, according to the battery electrode figure, suitable position machining small holes on welding, the hole diameter size is 3mm, 4 of numbers;
7, be ready to back of the body contact cell piece, welding is laid on the cell piece back side;
By the hole on the welding pad on welding and the cell piece is had good positioning when 8, welding is laid;
9, according to the manual welding method of routine, streak gently on the welding surface with electric iron, the electric iron temperature arranges according to the welding alloy layer and decides, and is generally 350 ℃.
Tensile test is qualified after the back of the body contact assembly that present case prepares, welding of battery film.
Embodiment 2
When applying the present invention to carry on the back contact assembly and preparing, operating procedure is as follows:
1, prepare purity greater than 99.999% Copper Foil, thickness is 150 μ m;
2, Copper Foil is cut into the wide copper bar of 0.6cm;
3, Copper Foil being incubated 7 minutes under 650 ℃ temperature also cools off;
4, Copper Foil is immersed in Sn
63Pb
37The welding alloy pond, temperature determines that by the welding alloy composition time was 2 seconds, cooling;
5, apply polyvinyl fluoride insulation enamelled coating at the welding lower surface;
6, according to the battery electrode figure, suitable position laser processing small holes on welding, the hole diameter size is 3mm, 1 of number;
7, be ready to back of the body contact cell piece, welding is laid on the cell piece back side;
By the hole on the welding pad on welding and the cell piece is had good positioning when 8, welding is laid;
9, conducting resinl is inserted in the middle of the hole, insulation is 5 minutes under 160 ℃ condition, finishes conducting resinl and solidifies.
The back of the body contact assembly that present case prepares, tensile test is qualified after the conducting resinl welding.
The using method of welding of the present invention is:
1, is ready to back of the body contact cell piece, welding is laid on the cell piece back side;
By the hole on the welding pad on welding and the cell piece is had good positioning when 2, welding is laid;
3, according to the manual welding method of routine, streak gently on the welding surface with electric iron, the electric iron temperature arranges according to the welding alloy layer and decides, and is generally 320 ℃ to 380 ℃.
Welding method also can be improved to, and conducting resinl or tin cream are filled in the welding hole, then conducting resinl is solidified to get final product, and curing temperature is 80 ℃ to 250 ℃, and the time is 3 minutes to 1 hour.
Claims (10)
1. a Novel back contacts photovoltaic module welding strip, it is characterized in that: described Novel back contact photovoltaic module welding strip is take copper core (1) as base material, upper and lower surface at copper core (1) covers one deck welding alloy layer (2), lower surface at the copper core covers one deck insulation enamelled coating (3), according to back of the body contact battery electrode figure, the welding contacting points position part hollow out of correspondence on welding is at the hole (4) that is used for welding and pad location and the welding of welding material of welding formation up/down perforation.
2. Novel back contact photovoltaic module welding strip according to claim 1 is characterized in that: the position of described hole and the big or small electrode pattern affirmation that contacts battery according to the back of the body.
3. Novel back according to claim 2 contacts photovoltaic module welding strip, and it is characterized in that: described hole (4) diameter is 0.5mm to 4mm, and number is 1 to 100.
4. Novel back according to claim 1 contacts photovoltaic module welding strip, and it is characterized in that: welding alloy layer (2) composition of described welding is: the ashbury metal of leaded ashbury metal and/or leaded, silver-colored ashbury metal and/or bismuth-containing.
5. Novel back according to claim 1 contacts photovoltaic module welding strip, and it is characterized in that: insulation enamelled coating (3) composition of described welding is: expandability polyethylene and/or thermoplastic elastomer (TPE) and/or polyvinyl fluoride and/or silica-base material.
6. the described Novel back contact of any one photovoltaic module welding strip in 5 according to claim 1 is characterized in that: the insulation enamelled coating (3) of described welding breaks away from and is attached to back of the body contact battery lower surface in welding.
7. the preparation method of the described Novel back contact of any one photovoltaic module welding strip in the claim 1 to 6:
1) prepare purity greater than 99.999% Copper Foil, thickness is 20 μ m to 250 μ m;
2) Copper Foil is cut into the wide copper bar of 1mm to 3cm;
3) Copper Foil being incubated 1 to 10 minute under 560 ℃ to 750 ℃ temperature also cools off;
4) Copper Foil is immersed in the welding alloy pond, temperature determines that by the welding alloy composition time was 1 to 30 second, cooling;
5) apply the insulation enamelled coating at the welding lower surface;
6) according to the battery electrode figure, suitable machining small hole, position on welding.
8. preparation method according to claim 7 is characterized in that: the processing method of described hole (4) is machining, Laser cutting or chemical corrosion processing.
9. according to claim 7 or 8 described preparation methods, it is characterized in that: copper thickness is 100 μ m in the step 1); Step 2) in Copper Foil cut into the wide copper bar of 1cm; In the step 3) Copper Foil is incubated 10 minutes under 600 ℃ temperature; In the step 4) Copper Foil is immersed in Sn
60Pb
40The welding alloy pond, the time was 2 seconds; Apply polyvinyl fluoride insulation enamelled coating at the welding lower surface in the step 5); Step 6) Hole diameter is 3mm, 4 of numbers.
10. according to claim 7 or 8 described preparation methods, it is characterized in that: copper thickness is 150 μ m in the step 1); Step 2) in Copper Foil cut into the wide copper bar of 0.6cm; In the step 3) Copper Foil is incubated 7 minutes under 650 ℃ temperature; In the step 4) Copper Foil is immersed in Sn
63Pb
37The welding alloy pond, the time was 2 seconds; Apply polyvinyl fluoride insulation enamelled coating at the welding lower surface in the step 5); Step 6) Hole diameter is 3mm, 1 of number.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210533396.7A CN103022204B (en) | 2012-12-12 | 2012-12-12 | A kind of back of the body contact photovoltaic module welding strip and preparation method thereof |
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| CN201210533396.7A CN103022204B (en) | 2012-12-12 | 2012-12-12 | A kind of back of the body contact photovoltaic module welding strip and preparation method thereof |
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| CN103022204A true CN103022204A (en) | 2013-04-03 |
| CN103022204B CN103022204B (en) | 2016-05-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426960A (en) * | 2013-03-21 | 2013-12-04 | 连云港神舟新能源有限公司 | Inter-digital back contact (IBC) battery piece conductive solder strip and method for connecting battery pieces by using same |
| CN103456843A (en) * | 2013-09-17 | 2013-12-18 | 连云港神舟新能源有限公司 | Method for manufacturing back contact type crystalline silicon solar cell component |
| CN103618016A (en) * | 2013-11-20 | 2014-03-05 | 奥特斯维能源（太仓）有限公司 | Novel MWT solar cell module and manufacturing method thereof |
| CN106914671A (en) * | 2017-03-13 | 2017-07-04 | 南京日托光伏科技股份有限公司 | A kind of MWT photovoltaic modulies draw welding method |
| CN108254248A (en) * | 2017-12-28 | 2018-07-06 | 南京日托光伏科技股份有限公司 | A kind of MWT battery electrode pull force test method and welding, welding fixture |
| CN110931588A (en) * | 2019-12-10 | 2020-03-27 | 安徽工业大学 | Flexible solar cell module and packaging structure thereof |
Citations (4)
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| US6441297B1 (en) * | 1998-03-13 | 2002-08-27 | Steffen Keller | Solar cell arrangement |
| CN102254978A (en) * | 2011-08-16 | 2011-11-23 | 上海华友金镀微电子有限公司 | Tin-lead welding strip for solar photovoltaic assembly and manufacturing method thereof |
| CN202534655U (en) * | 2012-04-06 | 2012-11-14 | 深圳市华光达科技有限公司 | Novel solar battery photovoltaic solder strip device |
| CN102800723A (en) * | 2011-05-27 | 2012-11-28 | 苏州阿特斯阳光电力科技有限公司 | Solar cell component and manufacturing method thereof |
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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6441297B1 (en) * | 1998-03-13 | 2002-08-27 | Steffen Keller | Solar cell arrangement |
| CN102800723A (en) * | 2011-05-27 | 2012-11-28 | 苏州阿特斯阳光电力科技有限公司 | Solar cell component and manufacturing method thereof |
| CN102254978A (en) * | 2011-08-16 | 2011-11-23 | 上海华友金镀微电子有限公司 | Tin-lead welding strip for solar photovoltaic assembly and manufacturing method thereof |
| CN202534655U (en) * | 2012-04-06 | 2012-11-14 | 深圳市华光达科技有限公司 | Novel solar battery photovoltaic solder strip device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426960A (en) * | 2013-03-21 | 2013-12-04 | 连云港神舟新能源有限公司 | Inter-digital back contact (IBC) battery piece conductive solder strip and method for connecting battery pieces by using same |
| CN103456843A (en) * | 2013-09-17 | 2013-12-18 | 连云港神舟新能源有限公司 | Method for manufacturing back contact type crystalline silicon solar cell component |
| CN103618016A (en) * | 2013-11-20 | 2014-03-05 | 奥特斯维能源（太仓）有限公司 | Novel MWT solar cell module and manufacturing method thereof |
| CN106914671A (en) * | 2017-03-13 | 2017-07-04 | 南京日托光伏科技股份有限公司 | A kind of MWT photovoltaic modulies draw welding method |
| CN108254248A (en) * | 2017-12-28 | 2018-07-06 | 南京日托光伏科技股份有限公司 | A kind of MWT battery electrode pull force test method and welding, welding fixture |
| CN110931588A (en) * | 2019-12-10 | 2020-03-27 | 安徽工业大学 | Flexible solar cell module and packaging structure thereof |
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| Publication number | Publication date |
|---|---|
| CN103022204B (en) | 2016-05-04 |
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Effective date of registration: 20201120 Address after: 277300 Yuejin Middle Road, Yicheng Industrial Park, Zaozhuang City, Shandong Province Patentee after: Shandong Yikai Electrical Equipment Co., Ltd Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee before: CHANGZHOU University |