EP2936565A1 - Vorrichtung zum anschliessen von fotovoltaikzellen mit kontakten auf ihrer rückseite und modul mit solch einer vorrichtung - Google Patents

Vorrichtung zum anschliessen von fotovoltaikzellen mit kontakten auf ihrer rückseite und modul mit solch einer vorrichtung

Info

Publication number
EP2936565A1
EP2936565A1 EP13815463.8A EP13815463A EP2936565A1 EP 2936565 A1 EP2936565 A1 EP 2936565A1 EP 13815463 A EP13815463 A EP 13815463A EP 2936565 A1 EP2936565 A1 EP 2936565A1
Authority
EP
European Patent Office
Prior art keywords
fabric
cells
fibers
electrically insulating
pads
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Withdrawn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
EP13815463.8A
Other languages
English (en)
French (fr)
Inventor
Charlotte Gillot
Stéphane GUILLEREZ
Philippe Voarino
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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 Commissariat a lEnergie Atomique et aux Energies Alternatives CEA filed Critical Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Publication of EP2936565A1 publication Critical patent/EP2936565A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical 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
    • H01L31/0512Electrical 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00Soldering, e.g. brazing, or unsoldering
    • B23K1/0008Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0016Brazing of electronic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/18Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/02Details
    • H01L31/0224Electrodes
    • H01L31/022408Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/022441Electrode arrangements specially adapted for back-contact solar cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/048Encapsulation of modules
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical 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
    • H01L31/0508Electrical 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical 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
    • H01L31/0516Electrical 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 specially adapted for interconnection of back-contact solar cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/18Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/20Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202Conductive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00Electrical equipment
    • B32B2457/12Photovoltaic modules
    • 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
    • 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor

Definitions

  • the present invention relates to a device for interconnecting photovoltaic cells with rear-panel contacts, enabling the cells to be modulated, as well as a module for photovoltaic cells with rear-panel contacts comprising such a device, and a method for manufacturing such a module.
  • the photovoltaic cells with rear-panel contacts are a particular type of cell which have their two metal electrodes on their rear face, that is to say their face opposite to the face receiving the solar radiation.
  • Electrical connection pads are then formed respectively on each of said electrodes to allow their connection to an electrical circuit for collecting the photogenerated current.
  • This configuration of the cells is particularly advantageous for producing a module comprising a plurality of such cells.
  • a first possibility is, as for standard photovoltaic cells, to use copper strips welded respectively on the pads of each of the metal electrodes on the rear face.
  • metal connectors may be employed.
  • the document US 201 1/0126878 thus proposes to interconnect the cells by means of preformed copper ribbons to reduce the thermomechanical stresses due to the difference in coefficient of thermal expansion between the cell material (generally silicon) and the copper.
  • a second possibility is, for the cells of the type "Metal Wrap Through” (MWT) or EWT ("Emitter Wrap Through”), to weld or paste the cells on a metallized film.
  • MMT Metal Wrap Through
  • EWT emitter Wrap Through
  • backsheet the protective back sheet
  • main functions are to provide insulation electrical and protect the module from external aggression, which fulfills this additional support role, a copper layer having the interconnecting metal tracks being deposited on the face of the protective backsheet in contact with the connection pads on the rear face cells.
  • a disadvantage of this technique is the high cost of such a metallized film, which is made with methods similar to those used for the production of printed circuits.
  • this technique involves a significant loss of material since the formation of the conductive tracks generally assumes the deposition of the metallized film on the entire surface of the protective backsheet followed by a chemical etching to keep only the regions intended to constitute the tracks .
  • the conductive tracks are formed on a support in the form of a mesh (or "mesh" according to the English terminology) of a polymeric material, said net being interposed between the protective backsheet and cells.
  • the assembly is then laminated with an encapsulating material which passes through the mesh of the net to ensure the mechanical strength of the module.
  • Said electrically insulating layer may be present on each cell, on the connector or on the metallized film.
  • said insulating layer may be an independent layer interposed between each cell and the connector or the metallized film.
  • WO 2012/059534 discloses a particular example of such an electrically insulating layer, which is in the form of a fiberglass fabric. Said layer is placed between the cells and the connectors, the electrical connection being made through the fabric. This requires that the meshes of said fabric are dimensioned so that, during the connection by welding the cells on the connectors, the fusible fusible alloy passes through the fabric.
  • this insulating layer involves an additional step in the manufacture of the module.
  • An object of the invention is therefore to design a means for interconnecting photovoltaic cells with rear-panel contacts that overcomes the aforementioned drawbacks.
  • the interconnection of the cells must be able to be achieved by implementing a minimum of steps and implementing the least possible separate components.
  • a device for interconnecting photovoltaic cells with rear-panel contacts characterized in that it comprises at least one layer of a fabric of electrically insulating fibers, said fabric comprising at least one portion of wire or ribbon made of an electrically conductive material woven with said fibers and arranged to be flush with the surface of at least one region of the fabric to form an electrical contact area for connection to a contact pad on the face back of a cell.
  • Said at least one portion of electrically conductive wire or tape may be parallel to the weft fibers of said fabric or to the warp fibers of said fabric.
  • said portion of electrically conductive wire consists of a plurality of strands.
  • the porosity of said fabric is chosen so as to allow impregnation of a photovoltaic cell encapsulation material during a step of lamination of the cells and of said device.
  • said fabric is a three-dimensional fabric comprising at least two layers of electrically insulating fibers, said layers being secured to one another by a plurality of electrically insulating fibers.
  • the electrically insulating fibers of said fabric may be glass fibers or textile fibers.
  • Said fabric advantageously has a weight per unit area of between 10 and
  • said portion of electrically conductive wire or tape is arranged to be flush with the surface of a region of a first face of the electrically insulating fiber fabric and at the surface of a region of a second face of the opposite fabric to the first face, so as to form electrical contact areas on two sides of said interconnection device.
  • the fabric may advantageously contain fibers made of a material for encapsulating photovoltaic cells, said material being adapted to impregnate the tissue and encapsulate the photovoltaic cells during a step of lamination of the cells and of said device.
  • Another subject of the invention relates to a photovoltaic cell module with interconnected rear-facing contacts, comprising a plurality of photovoltaic cells with rear-panel contacts and an interconnection device as described. above arranged along the rear face of the cells, the arrangement of the electrical contact areas on the surface of the electrically insulating fiber fabric of said device being chosen so that the contact pads of the cells are integral with the contact areas of said device and that said contact pads are electrically insulated from each other by a region of the electrically insulating fiber cloth layer located between said pads.
  • the interconnection device provides the electrical connection of at least one contact pad of a cell to a contact pad having a reverse polarity of an adjacent cell via a same electrical contact zone or through two distinct electrical contact zones, said zones being electrically connected by a ribbon arranged transversely to said zones.
  • said module may comprise, between the rear face of said cells and the interconnection device, at least one layer of a fabric made of electrically insulating fibers.
  • the cells and the interconnection device may be encapsulated in an encapsulation material, said material impregnating the fabric of the interconnection device.
  • Another object of the invention relates to a method of manufacturing a module comprising a plurality of photovoltaic cells with interconnected rear-facing contacts, which comprises:
  • the electrical connection of the pads with the electrical contact zones is made by welding.
  • the electrical connection of the pads with the electrical contact areas is achieved by gluing by means of a conductive adhesive.
  • Said method may further comprise a step of lamination of the device connected to the cells with an encapsulating material, said material impregnating the mesh of the fabric.
  • said method comprises inserting an electrically insulating fabric between the interconnection device and the rear face of the photovoltaic cells before making the electrical connection between the pads and the zones. electrical contact, then the realization of said electrical connection by providing an electrically conductive material, said material being able to pass through said fabric.
  • the provision of the interconnection device advantageously comprises weaving the electrically insulating fibers and said at least one portion of electrically conductive wire or tape to form the fabric.
  • FIG. 1 is a sectional view, before lamination, of the components of a module according to one embodiment of the invention
  • FIG. 2 schematically illustrates an example of interconnection of cells with contacts on the rear face
  • FIGS. 3A and 3B illustrate two embodiments of the interconnection device in which the electrically insulating fiber fabric is a three-dimensional fabric
  • FIG. 4 illustrates an embodiment of a module in which an electrically insulating layer is interposed between the rear face of the cells and the interconnection device
  • FIGS. 5 and 6 illustrate examples of modules according to the invention.
  • Figure 1 is a sectional view of the components necessary for the realization of a module comprising interconnected photovoltaic cells, before the lamination step.
  • the module may comprise a larger number of photovoltaic cells, which may for example be arranged in rows and columns.
  • An interconnection device 1 is arranged along the rear faces of the cells PV1, PV2.
  • said device 1 comprises a fabric of electrically insulating fibers 10.
  • the fabric also includes weft fibers perpendicular to the warp fibers.
  • the device 1 comprises at least a portion 100 of electrically conductive wire or tape arranged among the fibers of the fabric, and flush on one side of the fabric (so-called front face) so as to form a zone 101 of electrical contact.
  • the zone 101 being put in vis-à-vis an interconnect pad located on the rear face of a photovoltaic cell, it can be connected electrically (reference 102) thereto by any known means such as welding, conductive glue, etc.
  • This device has the advantage of providing an electrical connection by a contact between the electrical contact zone and the contact pad. It is therefore not necessary to size the fiber fabric for the passage of the interconnection material, whether it is a fusible alloy in the case of a weld or glue.
  • said portion 100 of electrically conductive wire or tape is arranged to be flush with two regions of the front face of the fabric, so as to form two contact areas electrical 101 vis-à-vis two contact pads of each of the two cells.
  • the electrical contact areas formed by the outcropping of the portion of electrically conductive wire or tape to the fabric surface may be on two opposite sides of the fabric.
  • the conductive areas of the fabric disposed opposite the face of the cell are intended to allow contact with one or more ribbons for obtaining electrical connections to the outside.
  • portion of wire or ribbon means that the electrically conductive wire or ribbon does not extend over the entire length or width of the interconnection device 1, but over a portion thereof sufficient to Interconnect two adjacent photovoltaic cells.
  • the portion of wire or ribbon does not have a length as large as that of the warp and / or weft son.
  • the interconnection device may therefore comprise several distinct portions of wire or ribbon extending on the same line, but not electrically connected to each other.
  • the interconnection device has electrically insulating regions 103 which allow isolating the electric contact areas 101 from the regions of the cell other than the contact pads.
  • the portion of wire or ribbon is arranged relative to the fibers of the fabric so that between two areas of electrical contact, the wire or ribbon passes under the fibers of the fabric: these regions of the device are electrically insulating because of the presence of the fibers on the surface.
  • the fabric may be made with fibers of different diameters to adjust the conductive regions and the insulating regions.
  • the insulating regions 103 may be made with larger fibers to provide a better overlap of the underlying wire or conductive strip portion.
  • the front face of the module (intended to receive the solar radiation) is covered with a glass plate 4 intended to protect the front face of the cells.
  • backsheet The rear face of the module is in turn covered by a protective sheet 5 called "backsheet”.
  • the electrical contact zones 101 of the device 1 are electrically connected to the contact pads of the cells PV1, PV2.
  • connection can be made by any type of conventional method such as welding or gluing.
  • the setting in module can, for example, include a lamination step, during which the encapsulation material or materials previously added to the various components of the module become (n) viscous, impregnated (s) the fabric because of the porosity of it and encapsulate (s) the different cells.
  • the invention is therefore not limited to a particular module setting technique.
  • the device described above has the advantage of being inexpensive and not causing loss of material.
  • the same device ensures both the electrical connection of the cells
  • FIG. 2 illustrates, from below, the principle of interconnection of the + and - poles of four cells PV1 to PV4 of a module.
  • each cell is schematized as a rectangle with three aligned positive pads and three aligned negative pads.
  • the contact pads + of the cell PV1 are electrically connected to the contact pads - of the adjacent cell PV2 by a first portion 100a of electrically conductive wire or tape.
  • the contact pads + of the PV2 cell are electrically connected to the contact pads - of the adjacent cell PV3 by a second portion 100b of electrically conductive wire or tape.
  • the contact pads + of the cell PV3 are electrically connected to the contact pads - of the adjacent cell PV4 by a third portion 100c of electrically conductive wire or tape.
  • portions 100a and 100c are aligned, they are not part of a continuous wire or ribbon and therefore they are not electrically connected.
  • the arrangement of the portions of electrically conductive yarn or tape in the insulating fiber fabric, and regions in which these portions are flush with the surface of the fabric, is defined according to the electrical wiring plane of the cells within the module.
  • the insertion of the portions of electrically conductive wire or tape is performed during weaving of the fabric.
  • the electrically insulating fiber fabric has a satin or twill type armor rather than a linen type.
  • the satin or twill type weaves exhibit a greater variety of patterns and allow to better adapt to cabling constraints and by providing a greater freedom of arrangement portions of electrically conductive wire or tape.
  • the definition of these types of armor is known as such and will not be described in detail here.
  • the electrically insulating fibers of the fabric are advantageously glass fibers or textile fibers such as polyamide for example.
  • the fabric typically has a basis weight of between 10 and
  • the fabric advantageously has a sufficient porosity that allows the impregnation of the encapsulation material (s) of the photovoltaic cells during a possible lamination step performed during the setting in module.
  • the encapsulating material which is generally a thermoplastic polymer or an elastomer such as EVA for example, becomes viscous under the effect of the heating implemented during the lamination and is able to pass through the meshes of the fabric of the so to impregnate it.
  • the fabric does not prevent a homogeneous distribution of the encapsulation material in the module.
  • the electrically insulating fiber fabric may be impregnated with a material to give it a certain dimensional stability.
  • said fabric may comprise fibers made of an encapsulating material (for example a thermoplastic) intended to melt during the lamination step.
  • an encapsulating material for example a thermoplastic
  • the fabric may be a so-called "3D" (three-dimensional) fabric comprising at least two layers 1 1, 12 of electrically insulating fibers 10, said layers 1 1, 12 being secured to one another by a plurality of electrically insulating fibers (not shown).
  • 3D three-dimensional
  • the fibers forming each of the layers may be identical or different.
  • the electrical contact areas 101 may be made by a portion of electrically conductive wire or tape, for example copper, silver or a copper-based alloy or silver.
  • the area of each electrical contact zone intended to be connected to a contact pad is preferably between 1 and 7 mm 2 .
  • the section of the wire or ribbon is typically between 0.1 and 0.5 mm 2 .
  • a copper ribbon 2 mm wide and 0.1 mm thick may be used.
  • it When it is a wire, it can be made of a single strand or a plurality of parallel strands arranged sufficiently close to each other to be connected to the same pad of a cell. In the latter case, said strands may optionally be separated from one another by one or more electrically insulating fibers.
  • the advantage of a plurality of strands with respect to a ribbon of equivalent cross-section is that it makes it possible to obtain a more flexible conductive portion, which reduces the thermomechanical stresses experienced by the latter during weaving and when module.
  • an electrically insulating porous layer 13 (for example, a fiberglass fabric) can be inserted between the rear face of the cells and the interconnection device.
  • This layer 13 reinforces the electrical isolation of the contact pads of the different cells.
  • Such a layer is of particular interest when the interconnection device comprises regions 101 'where a portion 100 of electrically conductive wire or tape is flush with the surface of the fabric but which are not intended to be connected to the contact pads of the cells. . These regions 101 'are therefore functionally different from the electrical contact zones 101.
  • the electrically insulating layer 13 makes it possible to avoid any unwanted electrical connection between the regions 101 'of the interconnection device and the contact pads of the cells.
  • Said layer 13 may be formed of the same electrically insulating fabric as the interconnection device (without any conductive wire or ribbon in this case), or of a different fabric.
  • the interconnection device provides the electrical connection of at least one contact pad of a cell to a contact pad having a reverse polarity of an adjacent cell.
  • connection is made by a same electrical contact zone which is arranged along said pads.
  • connection is made by two distinct electrical contact zones, said zones being electrically connected to each other by a portion of ribbon arranged transversely to said zones.
  • FIGS 5 and 6 illustrate two examples of implementation of the invention.
  • FIG. 5 schematically illustrates a module of 2x2 photovoltaic cells with rear-panel contacts PV1 to PV4.
  • Each cell has four contact pads connected to an output + and three contact pads connected to an output -.
  • the pads + of the cell PV2 are connected to the pads - of the cell PV4 by two sets of conductive wires 101, 101a, said portions being electrically connected by a ribbon 104 arranged transversely to said portions.
  • the ribbon portion 104 may be welded to each of said wire portions 101, 101a, on the face opposite to the cells of the interconnect device 1.
  • the ribbon portion may be integrated into a three-dimensional tissue between two layers of said tissue.
  • FIG. 6 schematically illustrates another module of 2x2 photovoltaic cells with rear-panel contacts PV1 to PV4.
  • Each cell has three contact pads connected to an output + and three contact pads connected to an output -.
  • three wire portions 101 connect the contact pads - of the PV1 cell to the contact pads + of the PV3 cell.
  • the contact pads + of the cell PV2 are connected to the contact pads - of the cell PV4 by three portions of wire 101b.
  • the contact pads - of the cell PV3 are connected to the contact poles + of the cell PV4 by two separate wire portions 101a, 101d and connected by a ribbon portion 104, which extends transversely to said portions 101a, 101 d.
  • the electrodes are formed on the rear face by interdigitated fingers.
  • An adhesive point or a weld zone is then formed on the electrical contact zones of the fabric and / or at the level of the electrodes according to the interconnection plane.
  • the interconnection device is tailored according to the module to be produced, taking into account in particular the number and type of cells and the interconnection plane of said cells.

Landscapes

  • Engineering & Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Photovoltaic Devices (AREA)
EP13815463.8A 2012-12-18 2013-12-18 Vorrichtung zum anschliessen von fotovoltaikzellen mit kontakten auf ihrer rückseite und modul mit solch einer vorrichtung Withdrawn EP2936565A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1262258A FR2999804B1 (fr) 2012-12-18 2012-12-18 Dispositif d'interconnexion de cellules photovoltaiques a contacts en face arriere, et module comprenant un tel dispositif
PCT/EP2013/077077 WO2014095991A1 (fr) 2012-12-18 2013-12-18 Dispositif d'interconnexion de cellules photovoltaiques a contacts en face arriere, et module comprenant un tel dispositif

Publications (1)

Publication Number Publication Date
EP2936565A1 true EP2936565A1 (de) 2015-10-28

Family

ID=48521043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13815463.8A Withdrawn EP2936565A1 (de) 2012-12-18 2013-12-18 Vorrichtung zum anschliessen von fotovoltaikzellen mit kontakten auf ihrer rückseite und modul mit solch einer vorrichtung

Country Status (7)

Country Link
US (1) US9653636B2 (de)
EP (1) EP2936565A1 (de)
JP (1) JP2016500487A (de)
KR (1) KR20150099535A (de)
CN (1) CN104871322A (de)
FR (1) FR2999804B1 (de)
WO (1) WO2014095991A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016096422A1 (en) * 2014-12-15 2016-06-23 Imec Vzw Method for interconnecting back-contact photovoltaic cells
WO2016156276A1 (en) * 2015-03-30 2016-10-06 Imec Vzw Electrically contacting and interconnecting photovoltaic cells
US9935213B2 (en) * 2015-06-26 2018-04-03 Sunpower Corporation Wire-based metallization for solar cells
EP3258503B1 (de) * 2016-06-17 2023-04-12 IMEC vzw Mischgewebe zur elektrischen kontaktierung von photovoltaischen zellen
EP3358630B1 (de) 2017-02-06 2020-04-15 IMEC vzw Teilweise durchscheinende photovoltaische module und verfahren zur herstellung
ES2764745T3 (es) * 2017-05-29 2020-06-04 Sefar Ag Célula fotovoltaica y módulos, así como procedimiento para su fabricación
US10233571B1 (en) * 2017-12-26 2019-03-19 GM Global Technology Operations LLC Multi-functional textiles with integrated sensing and control elements
CN109659402A (zh) * 2019-01-24 2019-04-19 常州时创能源科技有限公司 太阳能电池片的串连工艺
PL3723206T3 (pl) * 2019-04-08 2023-02-06 Vibia Lighting S.L. Urządzenie elektryczne podłączane do przewodzącej taśmy tkaniny
FR3117673B1 (fr) * 2020-12-16 2023-04-28 Commissariat Energie Atomique Interconnecteur pour chaînes de cellules solaires destinées à former un module photovoltaïque

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255047A (en) * 1961-09-07 1966-06-07 Int Rectifier Corp Flexible fabric support structure for photovoltaic cells
US5972732A (en) 1997-12-19 1999-10-26 Sandia Corporation Method of monolithic module assembly
US7163596B2 (en) * 2002-06-07 2007-01-16 E. I. Du Pont Nemours And Company Fibers and ribbons for use in the manufacture of solar cells
JP2004288898A (ja) * 2003-03-24 2004-10-14 Canon Inc 太陽電池モジュールの製造方法
DE10325883A1 (de) * 2003-06-06 2004-12-30 Infineon Technologies Ag Verfahren zur Kontaktierung von leitfähigen Fasern
EP2100336A4 (de) 2006-12-22 2013-04-10 Applied Materials Inc Verbindungstechnologien für rückkontakt-solarzellen und -module
WO2009134939A2 (en) 2008-04-29 2009-11-05 Advent Solar, Inc. Photovoltaic modules manufactured using monolithic module assembly techniques
US20100031997A1 (en) * 2008-08-11 2010-02-11 Basol Bulent M Flexible thin film photovoltaic modules and manufacturing the same
US20100089434A1 (en) * 2008-10-11 2010-04-15 Fishman Oleg S Efficient Air-Cooled Solar Photovoltaic Modules and Collectors for High Power Applications
DE102009023901A1 (de) * 2009-06-04 2010-12-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Photovoltaisches Modul mit flächigem Zellverbinder
WO2012059534A2 (en) * 2010-11-05 2012-05-10 Photovoltech N.V. Use of a uniform layer of insulating material in back-contact solar cells
NL2006966C2 (en) 2011-06-17 2012-12-18 Stichting Energie Photovoltaic system and connector for a photovoltaic cell with interdigitated contacts.
ES2533574T3 (es) * 2012-05-04 2015-04-13 Sol Invictus Energy Materiales tejidos híbridos útiles en la producción de células solares de contacto posterior

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2014095991A1 *

Also Published As

Publication number Publication date
WO2014095991A1 (fr) 2014-06-26
KR20150099535A (ko) 2015-08-31
FR2999804B1 (fr) 2015-01-09
US20150340529A1 (en) 2015-11-26
US9653636B2 (en) 2017-05-16
FR2999804A1 (fr) 2014-06-20
JP2016500487A (ja) 2016-01-12
CN104871322A (zh) 2015-08-26

Similar Documents

Publication Publication Date Title
EP2936565A1 (de) Vorrichtung zum anschliessen von fotovoltaikzellen mit kontakten auf ihrer rückseite und modul mit solch einer vorrichtung
EP2057687B1 (de) Ungehäuster mikroelektronischer chip, der mit einer aushöhlung ausgestattet ist, die ein gehäuse für ein drahtelement bildet, das eine flexible mechanische struktur darstellt, herstellungsprozess und mikrostruktur
EP0128822B1 (de) Verfahren zur Herstellung von Speicherkarten und hierdurch hergestellte Karten
FR2944610A1 (fr) Dispositif electrochrome a transparence controlee
EP2159848A1 (de) Zusammenrollbarer, fotovoltaischer Verbundstoff und Sonnenschutzvorrichtung, die einen solchen Verbundstoff umfasst
FR2725310A1 (fr) Cellule solaire pourvue de contacts d'un nouveau type
WO2006045968A1 (fr) Structure multicouche monolithique pour la connexion de cellules a semi-conducteur
EP3493277B1 (de) Verfahren zur verbindung von photovoltaikzellen mit einer elektrode, ausgestattet mit metallnanodrähten
EP2591498A1 (de) Verfahren zur chipmontage bei einem flexiblen substrat
TWI536587B (zh) The use of a uniform layer of insulating material in a back contact with a solar cell
EP2510553A1 (de) Pv-zelle, verfahren zur montage mehrerer zellen und anordnung aus mehreren pv-zellen
FR2850488A1 (fr) Module photovoltaique comportant des bornes de connexion avec l'exterieur
FR3039706A1 (fr) Procede de fabrication d'un module photovoltaique ayant des pertes resistives faibles
CN102449783B (zh) 具有平面电池连接器的光伏组件
FR3116650A1 (fr) Module photovoltaïque léger et flexible amélioré
EP3496160A1 (de) Fotovoltaikmodul, das fotovoltaikzellen umfasst, die mithilfe von verbindungselementen miteinander verbunden sind
EP2108724B1 (de) Verfahren zur Herstellung einer heizenden Textilbahn und heizende Textilbahn
FR2694139A1 (fr) Substrat d'interconnexion pour composants électroniques et son procédé de fabrication.
EP3755169A1 (de) Bekleidungsstück mit mindestens einem leitfähigen draht und zugehöriges herstellungsverfahren
EP3914116B1 (de) Bekleidungsstück mit integration von mindestens zwei miteinander verbundenen leitfähigen drähten und zugehöriges verbindungsverfahren
EP0930807B1 (de) Scheibenheizung
WO2024115696A1 (fr) Ensemble pour module photovoltaïque, module photovoltaïque et procédé de fabrication de l'ensemble et du module
FR3123762A1 (fr) Elément d’interconnexion électrique d’au moins deux cellules photovoltaïques
FR2856336A1 (fr) Feuille de matiere thermoplastique renforcee par des elements unidirectionnels de renforcement, et procede de fabrication
FR3057199A1 (fr) Procede de fabrication d'un materiau composite integrant deux conducteurs electriquement connectes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150609

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20181122

RIC1 Information provided on ipc code assigned before grant

Ipc: H01L 31/18 20060101ALI20190531BHEP

Ipc: H01L 31/0224 20060101ALI20190531BHEP

Ipc: H01L 31/05 20140101AFI20190531BHEP

Ipc: B32B 37/18 20060101ALI20190531BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20190801

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VOARINO, PHILIPPE

Inventor name: GILLOT, CHARLOTTE

Inventor name: GUILLEREZ, STEPHANE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20191212