CN102569463A - Back film for back contact type solar cell and production process thereof - Google Patents

Back film for back contact type solar cell and production process thereof Download PDF

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Publication number
CN102569463A
CN102569463A CN2012100290857A CN201210029085A CN102569463A CN 102569463 A CN102569463 A CN 102569463A CN 2012100290857 A CN2012100290857 A CN 2012100290857A CN 201210029085 A CN201210029085 A CN 201210029085A CN 102569463 A CN102569463 A CN 102569463A
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China
Prior art keywords
solar cell
base material
notacoria
fluorine
pet base
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Pending
Application number
CN2012100290857A
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Chinese (zh)
Inventor
黄新东
司琼
丁玲
刘天人
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Wuxi Zhongjie Energy Technology Co Ltd
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Wuxi Zhongjie Energy Technology Co Ltd
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Priority to CN2012100290857A priority Critical patent/CN102569463A/en
Publication of CN102569463A publication Critical patent/CN102569463A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The invention relates to a back film for a back contact type solar cell and a production process of the back film. The production process comprises the following processing steps: compounding one surface of a PET (polyethylene terephthalate) base material with fluorine-containing polymer film or a fluorine-containing coating by adopting a bonding material; compounding the other surface of the PET base material with a polyolefin material by adopting the bonding material; punching in a metal foil, with a number of 16-128 per square meter and a diameter of punctures of 100-5000Mum; compounding the other surface of the polyolefin material with the metal foil by adopting the bonding material, with the compounding pressure of 3-10kgf, and carrying out curing for 2-7 days at a temperature of 40-60 DEG C. The back film for a back contact type solar cell and the production process of the back film have the following advantages: the cathode (an illumination surface) and the anode (a backlight surface) of the solar cell are both led to the back of the solar cell, thereby avoiding the sunlight from shading by original bus bars of the cathode (the illumination surface), and improving the generating efficiency of the solar cell. As the cathode and the anode of the cell are on a same plane, interconnection of the cells is facilitated, and the solar cell packaging process is more convenient.

Description

Back contact solar battery is with notacoria and production technology thereof
Technical field
The present invention relates to a kind of solar battery back film, especially a kind of back contact solar battery is with notacoria and production technology thereof.
Background technology
Present domestic crystal silicon solar battery component package mainly contains two types of multiple membranous type (weathering layer material etc. is bonded through glue with base material) and application types (on base material, directly applying one deck fluorine-containing coat) with notacoria; Notacoria directly carries out lamination through heat lamination technology and glass, EVA, battery sheet, EVA; Form solar module; And the original busbar of current battery sheet negative pole (plane of illumination) is because of at battery surface; Can produce the sunlight that gets into through the glass transmission and cover, thereby reduce the effective absorbing area of battery sheet, reduce the utilance of battery sheet for sunlight.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art; Provide a kind of back contact solar battery with notacoria and production technology thereof; Improve the capacity factor of battery sheet, and it is interconnected to be convenient to battery, makes the solar cell packaging technology become convenient for solar energy.
According to technical scheme provided by the invention; A kind of back contact solar battery is used notacoria; Comprise the PET base material; Characteristic is: the one side at said PET base material is provided with fluorine-containing coat or fluoro-containing copolymer film, at the another side of PET base material polyolefin layer is set, and connects metal forming at logical the 3rd tack coat of outer surface of polyolefin layer; Connect by first tack coat between said PET base material and fluorine-containing coat or the fluoro-containing copolymer film, connect by second tack coat between said PET base material and the polyolefin layer.
The thickness of said fluoro-containing copolymer film or fluorine-containing coat is 10~50 μ m.
The thickness of said first tack coat, second tack coat and the 3rd tack coat is 5~15 μ m.
The thickness of said polyolefin layer is 20~150 μ m.
The thickness of said metal forming is 10~50 μ m, and metal forming is provided with the hole that diameter is 100~5000 μ m, and the quantity in hole is 16~128 Ge/㎡.
The present invention also protects the production technology of the high weather-proof solar cell notacoria of a kind of nano plasma modified fluoride-containing, and characteristic is to comprise following processing step:
(1) earlier that the one side of PET base material is compound through binding material with fluoro-containing copolymer film or fluorine-containing coat, composite pressure is 3~10Kgf, carries out 1~3 day primary solidification at 40~60 ℃;
(2) carry out compoundly again through the one side of binding material and polyolefine material at the another side of PET base material, composite pressure is 3~10Kgf, 40~60 ℃ of slakings of carrying out 1~3 day;
(3) on metal forming, punch, the punching number is 16~128 Ge/㎡, and the diameter in hole is 100~5000 μ m, and is for use;
(4) carry out compoundly then through binding material and metal forming at the another side of polyolefine material, composite pressure is 3~10Kgf, 40~60 ℃ of slakings of carrying out 2~7 days.
Said fluoro-containing copolymer film is single fluorine polyethylene (PVF), inclined to one side difluoro polyethylene (PVDF) or ETFE polymer (ETFE).
Said fluorine-containing coat is that fluoroolefins-vinyl ether co-polymer (FEVE) resin is the fluoro-containing coating of matrix resin.
Said polyolefine material is LLDPE or non-linear polyethylene glued membrane.
Said binding material is two component Polyurethane glues.
Advantage of the present invention: the negative pole of its solar cell (plane of illumination) and anodal (shady face) are all guided to the back side of solar cell, have avoided the original busbar of negative pole (plane of illumination) for the covering of sunlight, and have increased the generating efficiency of solar cell.The negative pole of battery and positive pole all at grade, it is interconnected to be convenient to battery, makes the solar cell packaging technology become convenient.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with concrete accompanying drawing the present invention is described further.
As shown in the figure: back contact solar battery according to the invention is used notacoria; Comprise PET base material 3; One side at said PET base material 3 is provided with fluorine-containing coat or fluoro-containing copolymer film 1; Another side at PET base material 3 is provided with polyolefin layer 5, in logical the 3rd tack coat of the outer surface 6 connection metal formings 7 of polyolefin layer 5; Connect by first tack coat 2 between said PET base material 3 and fluorine-containing coat or the fluoro-containing copolymer film 1, connect by second tack coat 4 between said PET base material 3 and the polyolefin layer 5; The thickness of said fluoro-containing copolymer film or fluorine-containing coat 1 is 10~50 μ m; The thickness of said first tack coat 2, second tack coat 4 and the 3rd tack coat 6 is 5~15 μ m; The thickness of said polyolefin layer 5 is 20~150 μ m; The thickness of said metal forming 7 is 10~50 μ m, and metal forming 7 is provided with the hole that diameter is 100~5000 μ m, and the quantity in hole is 16~128 Ge/㎡.
First tack coat of the present invention, second tack coat and the 3rd tack coat are made up of binding material, and said binding material can play bond fluoropolymers film or fluorine-containing coat and PET base material; The not concrete restriction of binding material used in the present invention, only otherwise goal of the invention of the present invention is produced restriction gets final product two component Polyurethane glues that for example embodiment of the invention adopted.
Fluoro-containing copolymer film used in the present invention or fluorine-containing coat are the outermost materials of notacoria; The outer surface of fluoro-containing copolymer film or fluorine-containing coat is the one side that contacts with air; Play effects such as ultraviolet resistance, the composite surface of the inner surface of fluoro-containing copolymer film or fluorine-containing coat and PET base material; The not concrete restriction of fluoro-containing copolymer film used in the present invention or fluorine-containing coat; Only otherwise goal of the invention of the present invention is produced restriction to get final product; The fluoro-containing copolymer film that for example embodiment of the invention adopted is single fluorine polyethylene (PVF), inclined to one side difluoro polyethylene (PVDF) or ETFE polymer (ETFE), and the fluorine-containing coat that the embodiment of the invention adopted is that fluoroolefins-vinyl ether co-polymer (FEVE) resin is the fluoro-containing coating of matrix resin.
Polyolefin layer of the present invention is made up of polyolefine material, and described polyolefine material material can work to improve notacoria when using and the peel strength of EVA (another kind of encapsulating material in the solar module); The not concrete restriction of polyolefine material used in the present invention, only otherwise goal of the invention of the present invention is produced restriction get final product, what for example the embodiment of the invention adopted is LLDPE or non-linear polyethylene glued membrane.
PET base material used in the present invention is a material of main part, plays mechanics and supports, intercepts steam, electric insulation; The one side of PET base material is compound with fluoro-containing copolymer film or fluorine-containing coat, and another side (EVA adhesive surface) is polyolefine material (modified poly ethylene etc.).
Embodiment one: the production technology of the high weather-proof solar cell notacoria of a kind of nano plasma modified fluoride-containing comprises following processing step:
(1) earlier that the one side of PET base material is compound through binding material with the PVF film, composite pressure is 3Kgf, carries out 3 days primary solidification at 40 ℃;
(2) carry out compoundly again through the one side of binding material and polyolefine material at the another side of PET base material, composite pressure is 3Kgf, 40 ℃ of slakings of carrying out 3 days;
(3) on metal forming, punch, the punching number is 16 Ge/㎡, and the diameter in hole is 100 μ m, and is for use;
(4) carry out compoundly then through binding material and metal forming at the another side of polyolefine material, composite pressure is 3Kgf, 40 ℃ of slakings of carrying out 7 days.
Embodiment two: the production technology of the high weather-proof solar cell notacoria of a kind of nano plasma modified fluoride-containing comprises following processing step:
(1) earlier that the one side of PET base material is compound through binding material with the PVDF film, composite pressure is 10Kgf, carries out 1 day primary solidification at 60 ℃;
(2) carry out compoundly again through the one side of binding material and polyolefine material at the another side of PET base material, composite pressure is 10Kgf, 60 ℃ of slakings of carrying out 1 day;
(3) on metal forming, punch, the punching number is 128 Ge/㎡, and the diameter in hole is 5000 μ m, and is for use;
(4) carry out compoundly then through binding material and metal forming at the another side of polyolefine material, composite pressure is 10Kgf, 60 ℃ of slakings of carrying out 2 days.
Embodiment three: the production technology of the high weather-proof solar cell notacoria of a kind of nano plasma modified fluoride-containing comprises following processing step:
(1) earlier that the one side of PET base material is compound through binding material with etfe film, composite pressure is 6Kgf, carries out 2 days primary solidification at 50 ℃;
(2) carry out compoundly again through the one side of binding material and polyolefine material at the another side of PET base material, composite pressure is 6Kgf, 50 ℃ of slakings of carrying out 2 days;
(3) on metal forming, punch, the punching number is 100 Ge/㎡, and the diameter in hole is 500 μ m, and is for use;
(4) carry out compoundly then through binding material and metal forming at the another side of polyolefine material, composite pressure is 6Kgf, 50 ℃ of slakings of carrying out 5 days.

Claims (10)

1. a back contact solar battery is used notacoria; Comprise PET base material (3); It is characterized in that: the one side at said PET base material (3) is provided with fluorine-containing coat or fluoro-containing copolymer film (1); Another side at PET base material (3) is provided with polyolefin layer (5), in logical the 3rd tack coat (6) connection of the outer surface metal forming (7) of polyolefin layer (5); Connect by first tack coat (2) between said PET base material (3) and fluorine-containing coat or the fluoro-containing copolymer film (1), connect by second tack coat (4) between said PET base material (3) and the polyolefin layer (5).
2. back contact solar battery as claimed in claim 1 is used notacoria, it is characterized in that: the thickness of said fluoro-containing copolymer film or fluorine-containing coat (1) is 10~50 μ m.
3. back contact solar battery as claimed in claim 1 is used notacoria, it is characterized in that: the thickness of said first tack coat (2), second tack coat (4) and the 3rd tack coat (6) is 5~15 μ m.
4. back contact solar battery as claimed in claim 1 is used notacoria, it is characterized in that: the thickness of said polyolefin layer (5) is 20~150 μ m.
5. back contact solar battery as claimed in claim 1 is used notacoria, it is characterized in that: the thickness of said metal forming (7) is 10~50 μ m, and metal forming (7) is provided with the hole that diameter is 100~5000 μ m, and the quantity in hole is 16~128 Ge/㎡.
6. the production technology of the high weather-proof solar cell notacoria of nano plasma modified fluoride-containing is characterized in that, comprises following processing step:
(1) earlier that the one side of PET base material is compound through binding material with fluoro-containing copolymer film or fluorine-containing coat, composite pressure is 3~10Kgf, carries out 1~3 day primary solidification at 40~60 ℃;
(2) carry out compoundly again through the one side of binding material and polyolefine material at the another side of PET base material, composite pressure is 3~10Kgf, 40~60 ℃ of slakings of carrying out 1~3 day;
(3) on metal forming, punch, the punching number is 16~128 Ge/㎡, and the diameter in hole is 100~5000 μ m, and is for use;
(4) carry out compoundly then through binding material and metal forming at the another side of polyolefine material, composite pressure is 3~10Kgf, 40~60 ℃ of slakings of carrying out 2~7 days.
7. the production technology of the high weather-proof solar cell notacoria of nano plasma modified fluoride-containing as claimed in claim 6 is characterized in that: said fluoro-containing copolymer film is single fluorine polyethylene (PVF), inclined to one side difluoro polyethylene (PVDF) or ETFE polymer (ETFE).
8. the production technology of the high weather-proof solar cell notacoria of nano plasma modified fluoride-containing as claimed in claim 6, it is characterized in that: said fluorine-containing coat is that fluoroolefins-vinyl ether co-polymer (FEVE) resin is the fluoro-containing coating of matrix resin.
9. the production technology of the high weather-proof solar cell notacoria of nano plasma modified fluoride-containing as claimed in claim 6, it is characterized in that: said polyolefine material is LLDPE or non-linear polyethylene glued membrane.
10. the production technology of the high weather-proof solar cell notacoria of nano plasma modified fluoride-containing as claimed in claim 6 is characterized in that: said binding material is two component Polyurethane glues.
CN2012100290857A 2012-02-10 2012-02-10 Back film for back contact type solar cell and production process thereof Pending CN102569463A (en)

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Application Number Priority Date Filing Date Title
CN2012100290857A CN102569463A (en) 2012-02-10 2012-02-10 Back film for back contact type solar cell and production process thereof

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104409540A (en) * 2014-10-24 2015-03-11 无锡中洁能源技术有限公司 Modified polyurethane solar cell backboard and preparation method thereof
CN105103301A (en) * 2013-04-17 2015-11-25 美国圣戈班性能塑料公司 Multilayer laminate for photovoltaic applications
CN105336805A (en) * 2014-08-12 2016-02-17 英属开曼群岛商精曜有限公司 Back-contact solar module and backplate structure thereof
CN105977324A (en) * 2016-07-25 2016-09-28 无锡中洁能源技术有限公司 Single-surface-fluorine-containing high-performance backboard
CN107611203A (en) * 2017-10-16 2018-01-19 苏州中来光伏新材股份有限公司 A kind of high performance solar cells backboard and preparation method and component
CN107611203B (en) * 2017-10-16 2024-04-30 苏州中来光伏新材股份有限公司 High-performance solar cell backboard, preparation method and assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007320218A (en) * 2006-06-02 2007-12-13 Toppan Printing Co Ltd Sheet for sealing back side of solar cell
CN101295743A (en) * 2008-04-15 2008-10-29 福建钧石能源有限公司 Thin film, its forming method and solar battery with the same
CN101615636A (en) * 2009-07-17 2009-12-30 上海海优威电子技术有限公司 Reduce the four-layer structure back board of solar cell of adhesive linkage
CN102233707A (en) * 2010-12-22 2011-11-09 保定天威集团有限公司 Lamination technique of thin film solar cell

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007320218A (en) * 2006-06-02 2007-12-13 Toppan Printing Co Ltd Sheet for sealing back side of solar cell
CN101295743A (en) * 2008-04-15 2008-10-29 福建钧石能源有限公司 Thin film, its forming method and solar battery with the same
CN101615636A (en) * 2009-07-17 2009-12-30 上海海优威电子技术有限公司 Reduce the four-layer structure back board of solar cell of adhesive linkage
CN102233707A (en) * 2010-12-22 2011-11-09 保定天威集团有限公司 Lamination technique of thin film solar cell

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105103301A (en) * 2013-04-17 2015-11-25 美国圣戈班性能塑料公司 Multilayer laminate for photovoltaic applications
CN105336805A (en) * 2014-08-12 2016-02-17 英属开曼群岛商精曜有限公司 Back-contact solar module and backplate structure thereof
CN104409540A (en) * 2014-10-24 2015-03-11 无锡中洁能源技术有限公司 Modified polyurethane solar cell backboard and preparation method thereof
CN105977324A (en) * 2016-07-25 2016-09-28 无锡中洁能源技术有限公司 Single-surface-fluorine-containing high-performance backboard
CN107611203A (en) * 2017-10-16 2018-01-19 苏州中来光伏新材股份有限公司 A kind of high performance solar cells backboard and preparation method and component
CN107611203B (en) * 2017-10-16 2024-04-30 苏州中来光伏新材股份有限公司 High-performance solar cell backboard, preparation method and assembly

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Application publication date: 20120711