EP2294627A2 - Structure de feuille arrière pour un module photovoltaïque - Google Patents

Structure de feuille arrière pour un module photovoltaïque

Info

Publication number
EP2294627A2
EP2294627A2 EP09749592A EP09749592A EP2294627A2 EP 2294627 A2 EP2294627 A2 EP 2294627A2 EP 09749592 A EP09749592 A EP 09749592A EP 09749592 A EP09749592 A EP 09749592A EP 2294627 A2 EP2294627 A2 EP 2294627A2
Authority
EP
European Patent Office
Prior art keywords
layer
photovoltaic module
solar cell
cell system
module according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09749592A
Other languages
German (de)
English (en)
Inventor
Wolfgang Lohwasser
Bertrand Jannon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amcor Flexibles Kreuzlingen AG
Original Assignee
Amcor Flexibles Kreuzlingen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amcor Flexibles Kreuzlingen AG filed Critical Amcor Flexibles Kreuzlingen AG
Priority to EP09749592A priority Critical patent/EP2294627A2/fr
Publication of EP2294627A2 publication Critical patent/EP2294627A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • 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

Definitions

  • the invention relates to a photovoltaic module in the form of a laminate, comprising a core layer of a solar cell system arranged in an embedding mass with an optically active side and a rear side, a first encapsulation layer arranged on the optically active side of the solar cell system and one arranged on the rear side of the solar cell system second encapsulation layer, wherein the embedding compound connects the solar cell system with the first and the second encapsulation layer and the laminate has a barrier layer facing the rear side of the solar cell system against the passage of water vapor in the form of an inorganic oxide or nitride layer.
  • Photovoltaic modules or solar cell modules are used to generate electrical energy from sunlight.
  • the energy is generated by the solar cell system, which is preferably formed from cells of amorphous or crystalline silicon.
  • the solar cell system is mechanically only slightly resilient and must be covered on both sides by an encapsulation layer.
  • Known encapsulation layers consist of glass or of single or multilayer plastic films or plastic film composites.
  • EVA Embedded vinyl acetate
  • PET Polyethylene terephthalate
  • PVF polyvinyl fluoride
  • the backside laminate is intended to substantially mechanically protect the structure and above all over the entire service life of a module of up to 30 years to ensure a sufficiently high electrical insulation.
  • the system voltages in a module installation can be up to 400V.
  • the backside laminate must therefore be stable as an insulating layer under weathering.
  • the laminate must withstand the high temperatures occurring during the manufacturing process of the solar module, which are necessary for melting and subsequent cross-linking of the EVA component, without damage.
  • PET polycarbonate
  • the most cost-effective is PET.
  • a major disadvantage of PET, however, is the property of hydrolyzing at high humidity and elevated temperature and thus slowly embrittle. If the degree of embrittlement is too high, PET may detach from the module, so that the electrical insulating effect of the PET film is no longer guaranteed.
  • the problem of embrittlement is solved today by sandwiching the PET between two PVF films.
  • the PET is no longer directly exposed to atmospheric moisture and the hydrolysis process of the PET is sufficiently delayed.
  • PVF is very expensive. In addition, its disposal as a fluoropolymer is problematic.
  • a photovoltaic module of the type mentioned is known from EP-B-1 018 166.
  • the inorganic oxide layer used as a barrier layer against the passage of water vapor is hereby arranged on the side of the plastic film or plastic film composite used as an encapsulation layer facing the solar cell system.
  • the electrical insulating layer formed by the plastic film or the plastic film composite is therefore the direct weathering and thus the moisture exposure finished- puts.
  • the invention has for its object to propose a suitable for encapsulation of the back of solar modules film laminate, which remains stable under the action of moisture.
  • the barrier layer is arranged on the side of the second encapsulation layer facing away from the rear side of the solar cell system and provided with a protective layer of plastic against mechanical damage.
  • the protective layer may be a plastic film having a thickness of 4 to 50 ⁇ m.
  • the protective layer is, for example, a film made of PET, which can optionally be stabilized with a UV blocker or dyed with a UV-absorbing pigment, in particular with carbon black or with TiO 2 .
  • the protective layer may also be a film of PEN.
  • PEN itself is UV-stable / absorbing and hydrolysis-resistant.
  • the protective layer may also be a lacquer, in particular a 2-component epoxy resin system, wherein the lacquer may optionally be colored with a UV-absorbing pigment, in particular with carbon black or with TiO 2 .
  • the second encapsulation layer arranged on the rear side of the solar cell system is preferably a single-layer or multi-layered film of PET and / or PC and has the function of an electrical insulation layer.
  • the second encapsulation layer (E2) may be stabilized with a UV blocker or colored with a UV-absorbing pigment, in particular with carbon black or with TiO 2 .
  • the water vapor barrier layer may be disposed on the protective layer or on the second encapsulating layer and bonded to the other layer by means of an adhesive layer.
  • the film to be coated is prepurified and / or activated by means of plasma pretreatment.
  • the water vapor barrier layer is preferably an inorganic oxide layer applied by evaporation by means of electron radiation in a vacuum to the protective layer or to the second encapsulation layer, in particular a layer of SiO x , where x has a value of 1, 2 to 1, 8, preferably 1, 3 to 1, 7, means.
  • the thickness of the barrier layer is preferably between about 30 and 200 nm.
  • the water vapor barrier layer is arranged on the side of the second encapsulation layer or the electrical insulation layer which is remote from the solar cell system.
  • the insulating layer which can be constructed as a single or multilayer, is protected against moisture and thus against hydrolysis.
  • FIG. 2 shows a first embodiment of the backside laminate of FIG. 1;
  • FIG. Fig. 3 shows a second embodiment of the backsheet laminate of Fig. 1;
  • Fig. 4 shows a third embodiment of the backside laminate of Fig.1.
  • a functional model of a photovoltaic module 10 shown in FIG. 1 shows the following structure:
  • 16 second encapsulation layer E2 e.g. made of PET and / or PC 17 adhesive layer
  • the second encapsulation layer 16 (E2) is an electrical insulation layer. It can be a single or multilayer film.
  • the protective layer 12, the water vapor barrier layer 14, the second encapsulant layer 16 (E2), and the optional UV barrier layer 18 together form the so-called backside laminate.
  • a first backside laminate 30 shown in FIG. 2 has the following structure:
  • the barrier layer 34 is deposited on the backside of the protective layer 32.
  • a second backside laminate 40 shown in FIG. 3 has the following structure:
  • the barrier layer 44 is deposited on the PET film 43 used as an intermediate film.
  • a third backside laminate 50 shown in FIG. 4 has the following structure:
  • PET Hostaphan ® RUVK protective layer with UV protection
  • SiOi .5 100 nm thick

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un module photovoltaïque sous forme de stratifié (10) qui présente une couche centrale constituée d'un système de cellules solaires (22) placé dans une matière d'enrobage (20, 24) et présentant une face optiquement active et une face arrière. Une première couche d'encapsulation (E1) est placée sur la face optiquement active du système de cellules solaires (22) et une deuxième couche d'encapsulation (E2) est placée sur la face arrière du système de cellules solaire (22). La matière d'enrobage (20, 24) relie le système de cellules solaires (22) à la première couche et à la deuxième couche d'encapsulation (E1, E2). Le stratifié (10) présente une couche barrière (14) empêchant le passage de la vapeur d'eau et réalisée sous forme de couche d'oxyde ou de nitrure inorganique, qui est placée sur la face de la deuxième couche d'encapsulation (E2) opposée à la face arrière du système de cellules solaires (22).
EP09749592A 2008-05-23 2009-05-15 Structure de feuille arrière pour un module photovoltaïque Withdrawn EP2294627A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09749592A EP2294627A2 (fr) 2008-05-23 2009-05-15 Structure de feuille arrière pour un module photovoltaïque

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08405143A EP2124261A1 (fr) 2008-05-23 2008-05-23 Structure de feuille arrière pour un module photovoltaïque
PCT/EP2009/003491 WO2009141102A2 (fr) 2008-05-23 2009-05-15 Module photovoltaïque
EP09749592A EP2294627A2 (fr) 2008-05-23 2009-05-15 Structure de feuille arrière pour un module photovoltaïque

Publications (1)

Publication Number Publication Date
EP2294627A2 true EP2294627A2 (fr) 2011-03-16

Family

ID=39639328

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08405143A Withdrawn EP2124261A1 (fr) 2008-05-23 2008-05-23 Structure de feuille arrière pour un module photovoltaïque
EP09749592A Withdrawn EP2294627A2 (fr) 2008-05-23 2009-05-15 Structure de feuille arrière pour un module photovoltaïque

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08405143A Withdrawn EP2124261A1 (fr) 2008-05-23 2008-05-23 Structure de feuille arrière pour un module photovoltaïque

Country Status (2)

Country Link
EP (2) EP2124261A1 (fr)
WO (1) WO2009141102A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038292A1 (de) 2010-07-22 2012-01-26 Evonik Röhm Gmbh Witterungsbeständige Rückseitenfolien
WO2012104668A1 (fr) * 2011-01-31 2012-08-09 Toray Films Europe Film de polyester blanc multicouche, procédé de production du film et utilisation dudit film comme partie de feuille arrière pour cellules photovoltaïques

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969521A1 (fr) 1998-07-03 2000-01-05 ISOVOLTAÖsterreichische IsolierstoffwerkeAktiengesellschaft Module photovoltaique et procédé de fabrication
EP1054456A3 (fr) * 1999-05-17 2007-01-03 Dai Nippon Printing Co., Ltd. Couche de protection pour un module de cellules solaires, sa méthode de fabrication et module de cellules solaires
JP2006179557A (ja) * 2004-12-21 2006-07-06 Toyo Aluminium Kk 太陽電池用シート部材
ATE518255T1 (de) * 2006-08-30 2011-08-15 Keiwa Inc Benutzung einer rückplatte für photovoltaikmodule und photovoltaikmodule damit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2009141102A2 (fr) 2009-11-26
WO2009141102A3 (fr) 2010-05-27
EP2124261A1 (fr) 2009-11-25

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