WO2013175393A2 - Panneau photovoltaïque flexible - Google Patents

Panneau photovoltaïque flexible Download PDF

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Publication number
WO2013175393A2
WO2013175393A2 PCT/IB2013/054160 IB2013054160W WO2013175393A2 WO 2013175393 A2 WO2013175393 A2 WO 2013175393A2 IB 2013054160 W IB2013054160 W IB 2013054160W WO 2013175393 A2 WO2013175393 A2 WO 2013175393A2
Authority
WO
WIPO (PCT)
Prior art keywords
layer
photovoltaic
flexible
photovoltaic cell
plastic material
Prior art date
Application number
PCT/IB2013/054160
Other languages
English (en)
Other versions
WO2013175393A3 (fr
Inventor
Domenico GIOCO
Original Assignee
Gioco Domenico
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 Gioco Domenico filed Critical Gioco Domenico
Publication of WO2013175393A2 publication Critical patent/WO2013175393A2/fr
Publication of WO2013175393A3 publication Critical patent/WO2013175393A3/fr

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
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0512—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module made of a particular material or composition of materials
    • 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
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
    • 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 present invention relates to a flexible photovoltaic panel comprising:
  • At least one encapsulating layer made of flexible plastic material and adapted to contain therein said photovoltaic cells, said encapsulating layer being formed by a first and a second layer arranged on opposite sides of said plurality of photovoltaic cells and melted around said photovoltaic cells;
  • a flexible panel of this type is described for example in Italian Patent IT 1362085.
  • a problem related to flexible panels is connected to the formation of micro-cracks on the cells, mainly due to excessive bending of the panel, beyond its tolerance limit, to peak loads on the panel surface, to violent impacts such as those due to hail, and to thermal stress.
  • Another problem is related to the handling of the heat that is locally produced due to the poor electrical conductivity at the breaking edges of the micro-cracks, or also due to the formation of hot spots determined by the partial shading of the panel.
  • micro-cracks In conventional flexible solar panels the problem of micro-cracks is normally solved by choosing materials with high resilience and suitable thickness; however the problem of micro-cracks still remains, even if limitedly, and it cannot be completely solved.
  • An object of the invention is therefore to provide a flexible panel that allows to solve at least partially the above problems.
  • a flexible panel of the above- mentioned type wherein a terminal bar of electrically conductive material is interposed between each photovoltaic cell and a photovoltaic cell adjacent thereto, a front surface and a rear surface of the terminal bar being electrically connected to a front surface of the photovoltaic cell and a rear surface of the adjacent photovoltaic cell, respectively, via a respective electrode comprising an optically transparent and electrically insulating film and a plurality of electrically conducting linear elements which are substantially parallel to one another and adhered to a surface of said film.
  • the overabundance of contacts decreases the risk of hot spots formation, which can also be a source of fire.
  • the cooling level of the panel is therefore increased.
  • the mode of cell contacting are those developed by Day4 Energy Inc., and making the object of patent publications WO 2004/021455, WO 2007/095757 and WO 2009/076740.
  • Figure 1 is a sectional view of a segment of a photovoltaic panel according to the invention.
  • Figure 2 is a perspective view of a pair of photovoltaic cells interconnected by adjacent electrodes.
  • a flexible photovoltaic panel substantially comprises:
  • photovoltaic cells 2 in particular made of mono- or poly-crystalline silicon, arranged according to a planar arrangement with a square or rectangular mesh;
  • encapsulating layer 3 made of flexible plastic material and adapted to contain the photovoltaic cells 2 therein, this layer being formed by encapsulating a first and a second layer 3a, 3b arranged on opposite sides of the photovoltaic cells 2 and melted around them;
  • front and rear refer to the operating condition of the photovoltaic panels.
  • a “front” layer is oriented towards the sunlight, i.e. located between the light source and the encapsulating layer containing the photovoltaic cells.
  • a “rear” layer is instead located on the opposite side of the encapsulating layer.
  • the encapsulating layer 3 can be made, for example, of polyurethane or thermoplastic olefin having a low coefficient of permeability to water vapor.
  • the encapsulating layer 3 contains a dope of material capable of activating the phenomenon of fluorescence and / or phosphorescence.
  • the emission of fluorescence or phosphorescence by the dope of the encapsulating layer gives rise, in the first case, to an increase in the efficiency of the photovoltaic panel and, in the second case, to an emission of light during the hours of darkness.
  • the fluorescence phenomenon originates from the capability of certain substances, such as rhodochrosite and fluorite (materials classified as rare earths), of re-emitting a received electromagnetic radiation at a higher wavelength and thus at a lower energy, more particularly of absorbing radiations in the ultraviolet range and emitting them in the visible light range.
  • rhodochrosite and fluorite materials classified as rare earths
  • fluorite materials classified as rare earths
  • Phosphorescence is a phenomenon of radiating emission, characteristic of certain chemicals such as white phosphorus, owing to electronic excitation, resulting from the decay of the electrons to quantum levels of lower energy. Contrary to fluorescence, wherein the effect is instantaneous and stops as soon as the energy source is interrupted, in the case of phosphorescence the effect continues even after.
  • the principle is activated by a source of energy, visible light or ultraviolet radiation, which excites the atoms, thus making some electrons jump to an outer orbit; when these electrons come back to the inner orbit, they emit light.
  • the front layer 4 can be made, for example, of polycarbonate or polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the rear layer 5 can be made, for example, of polycarbonate or polyethylene terephthalate.
  • the rear layer 5 is made of thermoplastic olefin having a low coefficient of permeability to water vapor.
  • a thermoplastic olefin (TPO) is conventionally defined as a hetero-phasic mixture comprising a phase comprising an ethylene and/or propylene homo- polymer phase (or ethylene-propylene statistical copolymer phase) and a phase consisting of a thermoplastic ethylene-propylene block elastomer.
  • the rear layer 6 may include a waterproof membrane of TPO, of the type commonly used in building industry.
  • the rear layer 5 comprises a sheet of aluminum, and at least one layer of plastic material joined and superimposed to each of the opposite surfaces of the aluminum sheet.
  • the above described panel is obtained by means of hot processes of the conventional type, for example vacuum lamination, calendering, and the like.
  • integral hinges may also be formed, for instance by thermoforming.
  • a terminal bar 21 made of electrically conductive material is interposed between each photovoltaic cell 2 and a photovoltaic cell 2 adjacent thereto.
  • Said terminal bar 21 may be arranged in a coplanar arrangement with the cells 2, as in the shown example, or, alternatively, it may be connected to the rear surface of a respective cell, according to the arrangement shown in publication WO 2009/076740, which is incorporated herein by reference.
  • a front surface 21a and a rear surface 21b of the terminal bar 21 are electrically connected to a front surface 2a of the first photovoltaic cell 2 and to a rear surface 2b of the photovoltaic cell 2 adjacent to said first cell, respectively.
  • Each of said electrical connections is obtained by a respective electrode 23 comprising an optically transparent and electrically insulating film 24 and a plurality of electrically conducting linear elements 25 (e.g. wires or strips), that are substantially parallel to one another and adhered to a surface of the film 24.
  • a method of manufacturing the electrodes 23 is described in WO 2004/021455, which is incorporated herein by reference.
  • Each electrode 23 is arranged so that the respective linear elements 25 are in electrical contact alternately with either of said front and rear surfaces 21a, 21b of the terminal bar 21 and with either of said front and rear surfaces 2a, 2b of the photovoltaic cells 2.
  • each photovoltaic cell 2 has a plurality of electrically conducting bus strips 26 parallel to one another. Said strips are obtained for example by screen printing.
  • the bus strips 26 are arranged perpendicularly to the linear elements 25 connected to the front surface 2a of the respective photovoltaic cell 2.
  • the bus strips 26 are in electrical contact with the respective linear elements 25, forming a grid of conducting elements. This pattern allows to handle situations in which micro-cracks are produced on the photovoltaic cell, as in most cases in which a micro-crack interrupts the continuity of one or more conductors adjacent thereto, at least one path allowing to conduct the electrical current to the terminal bars is provided.
  • each photovoltaic cell 2 has a coating made of conductive material, which is in electrical contact with the plurality of linear elements 25 connected to the rear surface 2b itself.

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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne un panneau photovoltaïque flexible (1) comprenant une pluralité de cellules photovoltaïques (2), une couche de matériau d'encapsulation (3) apte à contenir les cellules photovoltaïques, une couche avant (4) de matériau plastique jointe et superposée à la couche d'encapsulation sur une première surface de celle-ci, et une couche arrière (5) de matériau plastique flexible jointe et superposée à la couche d'encapsulation sur une seconde surface de celui-ci, opposée à ladite première surface. Une barre terminale (21) est interposée entre chaque cellule photovoltaïque et une cellule photovoltaïque adjacente à celle-ci, une surface avant (21a) et une surface arrière (21b) de ladite barre étant connectées électriquement à une surface avant (2a) de la cellule photovoltaïque et à une surface arrière (2b) de la cellule photovoltaïque adjacente, respectivement, par l'intermédiaire d'une électrode respective (23) comprenant un film (24) et une pluralité d'éléments linéaires électroconducteurs (25) sensiblement parallèles l'un à l'autre et collés à une surface dudit film.
PCT/IB2013/054160 2012-05-22 2013-05-21 Panneau photovoltaïque flexible WO2013175393A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000095U ITTO20120095U1 (it) 2012-05-22 2012-05-22 Pannello fotovoltaico flessibile.
ITTO2012U000095 2012-05-22

Publications (2)

Publication Number Publication Date
WO2013175393A2 true WO2013175393A2 (fr) 2013-11-28
WO2013175393A3 WO2013175393A3 (fr) 2014-10-30

Family

ID=46834334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2013/054160 WO2013175393A2 (fr) 2012-05-22 2013-05-21 Panneau photovoltaïque flexible

Country Status (2)

Country Link
IT (1) ITTO20120095U1 (fr)
WO (1) WO2013175393A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107994086A (zh) * 2017-12-29 2018-05-04 苏州携创新能源科技有限公司 一种光伏毯
EP3859794A4 (fr) * 2018-09-28 2021-12-15 Panasonic Corporation Procédé de fabrication de module de cellules solaires et module de cellules solaires

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004021455A1 (fr) 2002-08-29 2004-03-11 Day4 Energy Inc. Electrode pour cellules photovoltaiques, cellule photovoltaique et module and photovoltaique
WO2007095757A1 (fr) 2006-02-24 2007-08-30 Day4 Energy Inc. Cellule photovoltaïque haute tension et module à cellule photovoltaïque
WO2009012567A1 (fr) 2007-07-23 2009-01-29 Day4 Energy Inc. Protection d'ombre pour cellules solaires et modules de cellules solaires
WO2009076740A1 (fr) 2007-12-18 2009-06-25 Day4 Energy Inc. Module photovoltaïque avec accès par le bord à des chaînes photovoltaïques, procédé d'interconnexion, appareil et système

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5741370A (en) * 1996-06-27 1998-04-21 Evergreen Solar, Inc. Solar cell modules with improved backskin and methods for forming same
US20090111206A1 (en) * 1999-03-30 2009-04-30 Daniel Luch Collector grid, electrode structures and interrconnect structures for photovoltaic arrays and methods of manufacture
US20100186801A1 (en) * 2007-03-13 2010-07-29 Basf Se Photovoltaic modules with improved quantum efficiency
US20100147368A1 (en) * 2007-05-17 2010-06-17 Day4 Energy Inc. Photovoltaic cell with shallow emitter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004021455A1 (fr) 2002-08-29 2004-03-11 Day4 Energy Inc. Electrode pour cellules photovoltaiques, cellule photovoltaique et module and photovoltaique
WO2007095757A1 (fr) 2006-02-24 2007-08-30 Day4 Energy Inc. Cellule photovoltaïque haute tension et module à cellule photovoltaïque
WO2009012567A1 (fr) 2007-07-23 2009-01-29 Day4 Energy Inc. Protection d'ombre pour cellules solaires et modules de cellules solaires
WO2009076740A1 (fr) 2007-12-18 2009-06-25 Day4 Energy Inc. Module photovoltaïque avec accès par le bord à des chaînes photovoltaïques, procédé d'interconnexion, appareil et système

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107994086A (zh) * 2017-12-29 2018-05-04 苏州携创新能源科技有限公司 一种光伏毯
CN107994086B (zh) * 2017-12-29 2024-05-24 江苏携创新能源科技有限公司 一种光伏毯
EP3859794A4 (fr) * 2018-09-28 2021-12-15 Panasonic Corporation Procédé de fabrication de module de cellules solaires et module de cellules solaires
US11581455B2 (en) 2018-09-28 2023-02-14 Panasonic Holdings Corporation Solar cell module manufacturing method and solar cell module

Also Published As

Publication number Publication date
WO2013175393A3 (fr) 2014-10-30
ITTO20120095U1 (it) 2013-11-23

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