WO2011072658A2 - Solar cell module - Google Patents

Solar cell module Download PDF

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Publication number
WO2011072658A2
WO2011072658A2 PCT/DE2010/001485 DE2010001485W WO2011072658A2 WO 2011072658 A2 WO2011072658 A2 WO 2011072658A2 DE 2010001485 W DE2010001485 W DE 2010001485W WO 2011072658 A2 WO2011072658 A2 WO 2011072658A2
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WO
WIPO (PCT)
Prior art keywords
solar cell
cover
cell module
module according
coating
Prior art date
Application number
PCT/DE2010/001485
Other languages
German (de)
French (fr)
Other versions
WO2011072658A3 (en
Inventor
Helmut FLÖDL
Peter Grabitz
Frank Schomann
Original Assignee
Systaic Cells Gmbh
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.)
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Publication date
Application filed by Systaic Cells Gmbh filed Critical Systaic Cells Gmbh
Publication of WO2011072658A2 publication Critical patent/WO2011072658A2/en
Publication of WO2011072658A3 publication Critical patent/WO2011072658A3/en

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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
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/055—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means where light is absorbed and re-emitted at a different wavelength by the optical element directly associated or integrated with the PV cell, e.g. by using luminescent material, fluorescent concentrators or up-conversion arrangements
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/255—Polyesters
    • 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
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/322—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of solar panels
    • 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
    • Y02E10/52—PV systems with concentrators

Definitions

  • the invention relates to a solar cell module, in which spaced-apart solar cells are connected in series as a string and connected to each other by connectors.
  • solar cell modules photovoltaic devices for the direct generation of electric current from light, in particular
  • a solar cell module usually consists of a composite of glass, solar cells connected to strings, an embedding material and a back construction.
  • the front glass is made of highly transparent material, which should keep the efficiency losses of the solar cell as low as possible, the protection against mechanical and weather influences.
  • the embedding material usually made of ethyl vinyl acetate films, serves to bond the module assembly.
  • the embedded monocrystalline or multicrystalline solar cells are connected in solar cell strings and soldered serially or connected to conductive plastics.
  • the connectors used between the solar cells for contacting are usually tinned copper connectors that are brightly bright on the surface of the solar cell module. This is caused by the optically glossy tin solder coating on the copper tape.
  • the back of the module protects the solar cells and the embedding material from moisture and oxygen. In addition, it serves as a mechanical protection against scratching, etc. when mounting and as electrical insulation.
  • the Rear construction can either be made of glass, but often of a composite film.
  • a “solar cell” (DE 35 16 117 C2) is known in which no direct connection is made between the semiconductor body and the connection contact arranged on the reflection-reducing layer, but instead the thin region of the reflection-reducing and simultaneously insulating layer lying between them is tunneled through by the charge carriers.
  • the front side contacts are applied to the reflection-reducing layer.
  • the object of the invention is to provide a solar cell module in which the surface design allows a high energy yield and the visual appearance is improved. This object is solved by the features of claim 1.
  • the subclaims indicate advantageous embodiments of the invention.
  • the invention according to the features of the main claim has the advantage that the connectors of solar cells, which shine optically and thus conspicuous as a strip are also visible from afar, are coated or covered on its surface.
  • Monocrystalline or multicrystalline solar cells are connected to each other according to standard string production by means of back and front connectors.
  • a cover is applied to mask the optically lustrous tin alloy, mostly formed from tin, copper, silver components with or without lead.
  • this cover consists of a special plastic adhesive tape. Suitable for this are, for example, special tapes that are available for solar cell production. They are compatible with typical lamination processes and consist of durable materials suitable for long-term use. They consist for example of a composite of PET and a pressure-sensitive adhesive, such as acrylic, on the underside as an adhesive bond.
  • the use of these tapes has the advantage that during the following lamination process, in which the EVA film is usually applied liquid, no slipping of this cover can take place, since the tapes remain by the adhesive bond exactly at the position at which they were placed.
  • the optically glossy tin Lotbeschich tion on the copper tape are opaque, black or matte black designed plastic tapes. They absorb the incident light radiation.
  • the color of the plastic adhesive tapes or of the coating can also be adapted to any other surface color of the solar cell.
  • the plastic adhesive tapes have for example a thickness including the adhesive layer of 0.02 to 0.05 mm and are suitable for a cosmetic masking of electrical traces.
  • the plastic tapes are compatible with the lamination temperature curve, which usually takes place at 140 ° C - 170 ° C with a duration of several minutes to 40 minutes in an evacuated laminating chamber.
  • the plastic adhesive tapes have no or very low Ausgasungshong, since no gas bubbles are visible after the lamination process.
  • plastic adhesive tapes Another characteristic of plastic adhesive tapes is good UV stability during operation.
  • fluorescent tapes or coatings can also be used for covering. These convert the light radiation directly incident on them into diffuse light photons, which are mainly reflected by the front glass inwards. This is particularly suitable for use with thin-film modules. Due to the fluorescence, a power increase of about 1 - 2% can be achieved.
  • the width of the covering plastic adhesive tape is adapted to the width of the connector, so that no power loss occurs by a direct shading of the solar cell. It is precisely the surface of the optically glossy tin solder adhesive covered, so that the cover during the lamination process can not slip.
  • the cross-connections of the strings are masked by the masking plastic tapes.
  • Fig.l shows a solar cell string from the side
  • FIG. 3 shows the solar cells according to FIG. 2 with the cover in plan view
  • FIG. 4 shows the string end with a cross connector in plan view
  • FIG. 5 shows the cross connector provided with a cover
  • FIG. 6 shows a laminated solar cell string in plan view
  • Fig. 7 shows a section through a solar module with a fluorescent cover.
  • Fig. 1 shows a plurality of solar cells 1, 2, 3, which are connected together to form a string 4.
  • the solar cells 1, 2, 3 on the side facing away from the light by means of rear side connectors 5, on the side facing the light by means of front side connectors 6 are interconnected.
  • a cover 8 is arranged with the adhesive 7.
  • fluorescent configured adhesive tapes can be used. These convert the direct incident light onto them into diffuse light photons, which are mainly reflected by the front glass inwards. This is particularly suitable for use with thin-film modules.
  • FIG. 2 shows a first solar cell 1 contacted on both sides and a solar cell 2 contacted on both sides.
  • Fig. 3 the contacted solar cells 1, 2 to the string end with a tape as a cover 8 are shown.
  • the tape 8 has a matt black surface design.
  • FIG. 4 shows the solar cells according to FIG. 3 and the string end with a transverse connector 9.
  • Fig. 5 the cross-connector 9 is shown at the string end, which is also covered as the connector surfaces on the emitter sides of the solar cells 1, 2 with a cover (a tape) 8.
  • Fig. 6 the string 4 of the solar cells 1, 2 is shown with the matt black tape 8 covering both the front-side connector 6 and the cross connector 9.
  • the string 4 is laminated on a black backsheet 10.
  • FIG. 7 shows a section through a solar module with a solar cell 2, on which a front-side connector 6 is arranged.
  • a fluorescent cover 11 is arranged with an adhesive 7.
  • a glass plate 12 is arranged.
  • the gap between the solar cell 2 and the glass plate 12 is filled with a so-called EVA film 13.
  • Incident light 14 is emitted diffusely by the fluorescent cover 11, these diffuse light beams 15 are irradiated by the glass plate 12 to the solar cell 2 and thus increase the light output.

Abstract

The invention relates to a solar cell module made of a solar cell string (4) made of individual solar cells (1, 2), the front-side connectors (6) of which made of optically glossy material have a cover (8) or a coating.

Description

Solarzellenmodul  solar cell module
Stand der Technik State of the art
Die Erfindung betrifft ein Solarzellenmodul, bei dem zueinander beabstandete Solarzellen als String in Reihe geschaltet sind und durch Verbinder miteinander verbunden sind. The invention relates to a solar cell module, in which spaced-apart solar cells are connected in series as a string and connected to each other by connectors.
Unter Solarzellenmodulen versteht man photovoltaische Bauelemente zur direkten Erzeugung von elektrischem Strom aus Licht, insbesondere By solar cell modules is meant photovoltaic devices for the direct generation of electric current from light, in particular
BESTÄTIGUNGSKOPIE Sonnenlicht. Zur kosteneffizienten Erzeugung von Solarstrom ist der Wirkungsgrad der verwendeten Solarzellen sowie die Herstellungskosten und die Haltbarkeit der Solarzellenmodule wesentlich. CONFIRMATION COPY Sunlight. For cost-effective generation of solar power, the efficiency of the solar cells used as well as the production costs and the durability of the solar cell modules is essential.
Ein Solarzellenmodul besteht üblicherweise aus einem Verbund aus Glas, zu Strings verschalteten Solarzellen, einem Einbettmaterial und einer Rückseitenkonstruktion. Dabei dient das Frontglas aus höchst transparentem Material, das die Wirkungsgradverluste der Solarzelle möglichst gering halten soll, dem Schutz vor mechanischen und Witterungseinflüssen . A solar cell module usually consists of a composite of glass, solar cells connected to strings, an embedding material and a back construction. The front glass is made of highly transparent material, which should keep the efficiency losses of the solar cell as low as possible, the protection against mechanical and weather influences.
Das Einbettmaterial, üblicherweise aus Ethyl-Vinylacetat-Folien, dient zur Verklebung des Modulverbundes. The embedding material, usually made of ethyl vinyl acetate films, serves to bond the module assembly.
Die eingebetteten mono- oder multikristallinen Solarzellen sind in Solarzellenstrings verbunden und seriell verlötet oder mit leitfähigen Kunststoffen verbunden. Die verwendeten Verbinder zwischen den Solarzellen, die der Kontaktierung dienen, sind üblicherweise verzinnte Kupfer-Verbinder, die an der Oberfläche des Solarzellenmoduls leuchtend hell sichtbar sind. Dies wird durch die optisch glänzende Zinn- Lotbeschichtung auf dem Kupferband verursacht. The embedded monocrystalline or multicrystalline solar cells are connected in solar cell strings and soldered serially or connected to conductive plastics. The connectors used between the solar cells for contacting are usually tinned copper connectors that are brightly bright on the surface of the solar cell module. This is caused by the optically glossy tin solder coating on the copper tape.
Die Modul rückseite schützt die Solarzellen und das Einbettmaterial vor Feuchtigkeit und Sauerstoff. Außerdem dient sie als mechanischer Schutz vor Verkratzen etc. beim Montieren und als elektrische Isolierung. Die Rückseitenkonstruktion kann entweder ebenfalls aus Glas bestehen, häufig aber aus einer Verbundfolie. The back of the module protects the solar cells and the embedding material from moisture and oxygen. In addition, it serves as a mechanical protection against scratching, etc. when mounting and as electrical insulation. The Rear construction can either be made of glass, but often of a composite film.
Bekannt ist eine„Solarzelle" (DE 35 16 117 C2), bei der keine direkte Verbindung zwischen dem Halbleiterkörper und dem auf der reflexionsmindernden Schicht angeordneten Anschlusskontakt hergestellt, sondern der dazwischen liegende dünne Bereich der reflexionsmindernden und gleichzeitig isolierenden Schicht von den Ladungsträgern durchtunnelt wird. Dabei werden die Vorderseitenkontakte auf die reflexionsmindernde Schicht aufgebracht. A "solar cell" (DE 35 16 117 C2) is known in which no direct connection is made between the semiconductor body and the connection contact arranged on the reflection-reducing layer, but instead the thin region of the reflection-reducing and simultaneously insulating layer lying between them is tunneled through by the charge carriers. The front side contacts are applied to the reflection-reducing layer.
Durch die immer größere Verbreitung und Anwendung von Solarzellenmodulen wird deren optische Ausgestaltung und die optimierte Energieausbeute immer wichtiger. Besonders bei der Anwendung der Solartechnik in der Automobilindustrie, also beispielsweise in einer Anordnung von Solarzellen auf dem Dach eines Fahrzeugs, ist das optische Erscheinungsbild in Verbindung mit optimaler Energieeffizienz für die Gesamtgestaltung des Fahrzeugs wesentlich. Due to the increasing use and distribution of solar cell modules, their optical design and the optimized energy yield are becoming increasingly important. Particularly in the application of solar technology in the automotive industry, so for example in an arrangement of solar cells on the roof of a vehicle, the visual appearance in conjunction with optimum energy efficiency for the overall design of the vehicle is essential.
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, ein Solarzellenmodul bereitzustellen, bei dem die Oberflächengestaltung eine hohe Energieausbeute gestattet und das optische Erscheinungsbild verbessert wird. Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Die Unteransprüche geben vorteilhafte Ausgestaltungen der Erfindung an. Against this background, the object of the invention is to provide a solar cell module in which the surface design allows a high energy yield and the visual appearance is improved. This object is solved by the features of claim 1. The subclaims indicate advantageous embodiments of the invention.
Offenbarung der Erfindung Disclosure of the invention
Die Erfindung gemäß den Merkmalen des Hauptanspruchs hat den Vorteil, dass die Verbinder von Solarzellen, die optisch glänzen und damit auffällig als Streifen auch von weitem sichtbar sind, auf ihrer Oberfläche beschichtet bzw. abgedeckt werden. The invention according to the features of the main claim has the advantage that the connectors of solar cells, which shine optically and thus conspicuous as a strip are also visible from afar, are coated or covered on its surface.
Dies erfolgt erfindungsgemäß durch eine Maskierung vor dem Laminierprozess. Dabei werden mono- oder multikristalline Solarzellen nach der standardmäßigen String-Herstellung durch Rückseiten- und Vorderseitenverbinder miteinander verbunden. Auf der gesamten Verbinder-Oberfläche der Vorderseiten-Verbinder wird zur Maskierung der optisch glänzenden Zinn-Legierung, zumeist ausgebildet aus Zinn-, Kupfer-, Silberbestandteilen mit oder ohne Bleianteil, eine Abdeckung aufgebracht. In einer vorteilhaften Ausgestaltung der Erfindung besteht diese Abdeckung aus einem speziellen Kunststoff-Klebeband. Geeignet dazu sind beispielsweise spezielle Tapes, die zur Solarzellenproduktion zur Verfügung stehen. Sie sind kompatibel zu den typischen Laminierungsprozessen und bestehen aus haltbaren Materialien, die zu einem langen Gebrauch geeignet sind. Sie bestehen beispielsweise aus einem Verbund von PET und einem druckempfindlichen Adhesiv, beispielsweise Acryl, auf der Unterseite als Klebeverbindung. Die Verwendung dieser Tapes hat den Vorteil, dass während des folgenden Laminierprozesses, bei dem die EVA-Folie üblicherweise flüssig aufgebracht wird, kein Verrutschen dieser Abdeckung erfolgen kann, da die Tapes durch die Klebehaftung genau an der Position verbleiben, an der sie angeordnet wurden. This is done according to the invention by a masking before the lamination process. Monocrystalline or multicrystalline solar cells are connected to each other according to standard string production by means of back and front connectors. On the entire connector surface of the front-end connectors, a cover is applied to mask the optically lustrous tin alloy, mostly formed from tin, copper, silver components with or without lead. In an advantageous embodiment of the invention, this cover consists of a special plastic adhesive tape. Suitable for this are, for example, special tapes that are available for solar cell production. They are compatible with typical lamination processes and consist of durable materials suitable for long-term use. They consist for example of a composite of PET and a pressure-sensitive adhesive, such as acrylic, on the underside as an adhesive bond. The use of these tapes has the advantage that during the following lamination process, in which the EVA film is usually applied liquid, no slipping of this cover can take place, since the tapes remain by the adhesive bond exactly at the position at which they were placed.
Zur Verwendung als Abdeckung der optisch glänzenden Zinn- Lotbeschich tung auf dem Kupferband eignen sich undurchsichtige, schwarz oder mattschwarz ausgestaltete Kunststoff-Klebebänder. Sie absorbieren die auf sie auftreffende Lichtstrahlung. Die Farbe der Kunststoff-Klebebänder oder der Beschichtung kann jedoch auch jeder anderen Oberflächenfarbe der Solarzelle angepasst sein. For use as a cover of the optically glossy tin Lotbeschich tion on the copper tape are opaque, black or matte black designed plastic tapes. They absorb the incident light radiation. However, the color of the plastic adhesive tapes or of the coating can also be adapted to any other surface color of the solar cell.
Die Kunststoff-Klebebänder weisen beispielsweise eine Dicke inclusive der Klebeschicht von 0,02 bis 0,05 mm auf und sind zu einer kosmetischen Maskierung von elektrischen Spuren geeignet. Die Kunststoff-Klebebänder sind kompatibel mit dem Temperatur- Verlauf beim Laminierprozess, der üblicherweise bei 140° C - 170° C mit einer Dauer von einigen Minuten bis zu 40 Minuten in einer evakuierten Laminierkammer stattfindet. Hierbei haben die Kunststoff-Klebebänder keine oder sehr geringe Ausgasungswerte, da nach dem Laminierungsprozess keine Gasbläschen sichtbar sind. The plastic adhesive tapes have for example a thickness including the adhesive layer of 0.02 to 0.05 mm and are suitable for a cosmetic masking of electrical traces. The plastic tapes are compatible with the lamination temperature curve, which usually takes place at 140 ° C - 170 ° C with a duration of several minutes to 40 minutes in an evacuated laminating chamber. Here, the plastic adhesive tapes have no or very low Ausgasungswerte, since no gas bubbles are visible after the lamination process.
Eine weitere Eigenschaft der Kunststoff-Klebebänder ist eine gute UV- Stabilität im Betrieb. Another characteristic of plastic adhesive tapes is good UV stability during operation.
In einer anderen Ausgestaltung der Erfindung können auch fluoreszierend ausgestaltete Klebebänder oder Beschichtungen zur Abdeckung verwendet werden. Diese wandeln die direkt auf sie auftreffende Lichtstrahlung um in diffuse Licht-Photonen, die hauptsächlich vom Frontglas wieder nach innen reflektiert werden. Dies ist besonders zur Anwendung für Dünnschichtmodule geeignet. Durch die Fluoreszenz kann eine Leistungserhöhung von ca. 1 - 2 % erzielt werden. In another embodiment of the invention, fluorescent tapes or coatings can also be used for covering. These convert the light radiation directly incident on them into diffuse light photons, which are mainly reflected by the front glass inwards. This is particularly suitable for use with thin-film modules. Due to the fluorescence, a power increase of about 1 - 2% can be achieved.
In einer weiteren vorteilhaften Ausgestaltung der Erfindung wird die Breite des abdeckenden Kunststoff-Klebebands der Breite des Verbinders angepasst, so dass kein Leistungsverlust durch eine direkte Abschattung der Solarzelle erfolgt. Es wird passgenau die Oberfläche des optisch glänzenden Zinn-Lots klebend abgedeckt, so dass die Abdeckung beim Laminierprozess nicht verrutschen kann. In einer weiteren vorteilhaften Ausgestaltung der Erfindung werden auch die Querverbindungen der Strings durch die maskierenden Kunststoff- Klebebänder abgeklebt. In a further advantageous embodiment of the invention, the width of the covering plastic adhesive tape is adapted to the width of the connector, so that no power loss occurs by a direct shading of the solar cell. It is precisely the surface of the optically glossy tin solder adhesive covered, so that the cover during the lamination process can not slip. In a further advantageous embodiment of the invention, the cross-connections of the strings are masked by the masking plastic tapes.
Durch diese vorteilhafte Ausgestaltung der Verbinder durch die Abdeckung wird das optische Erscheinungsbild der Solarzellenmodule erheblich verbessert, da die hellen Verbinder-Linien nicht mehr sichtbar sind. Das Glas und die Einbettungsbedingungen der Solarzellen können wie bisher angewandt werden. This advantageous embodiment of the connector through the cover, the visual appearance of the solar cell modules is significantly improved because the bright connector lines are no longer visible. The glass and the embedding conditions of the solar cells can be used as before.
Weitere Vorteile und vorteilhafte Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung, den Zeichnungen und den Ansprüchen entnehmbar. Further advantages and advantageous embodiments of the invention are the following description, the drawings and claims removed.
Zeichnungen drawings
Fig.l zeigt einen Solarzellenstring von der Seite, Fig.l shows a solar cell string from the side,
Fig. 2 zeigt zwei beidseitig kontaktierte Solarzellen in Draufsicht, 2 shows two solar cells contacted on both sides in plan view,
Fig. 3 zeigt die Solarzellen nach Fig. 2 mit der Abdeckung in Draufsicht, FIG. 3 shows the solar cells according to FIG. 2 with the cover in plan view, FIG.
Fig. 4 zeigt das String-Ende mit einem Querverbinder in Draufsicht, in Fig. 5 ist der mit einer Abdeckung versehene Querverbinder dargestellt, in Fig. 6 ist ei einlaminierter Solarzellenstring in Draufsicht dargestellt, und FIG. 4 shows the string end with a cross connector in plan view, FIG. 5 shows the cross connector provided with a cover, FIG. 6 shows a laminated solar cell string in plan view, and FIG
Fig. 7 zeigt einen Schnitt durch ein Solarmodul mit einer fluoreszierenden Abdeckung. Fig. 7 shows a section through a solar module with a fluorescent cover.
Beschreibung der Ausführungsbeispiele Description of the embodiments
Fig. 1 zeigt mehrere Solarzellen 1, 2, 3, die zu einem String 4 zusammengeschaltet sind. Dabei sind die Solarzellen 1, 2, 3 auf der dem Licht abgewandten Seite mittels Rückseiten- Verbindern 5, auf der dem Licht zugewandten Seite mittels Vorderseiten- Verbindern 6 untereinander verbunden. Über den Vorderseiten- Verbindern 6 wird mit dem Adhesiv 7 eine Abdeckung 8 angeordnet. Zur Abdeckung können auch fluoreszierend ausgestaltete Klebebänder verwendet werden. Diese wandeln die direkt auf sie auf treffende Lichtstrahlung um in diffuse Licht- Photonen, die hauptsächlich vom Frontglas wieder nach innen reflektiert werden. Dies ist besonders zur Anwendung für Dünnschichtmodule geeignet. Fig. 1 shows a plurality of solar cells 1, 2, 3, which are connected together to form a string 4. In this case, the solar cells 1, 2, 3 on the side facing away from the light by means of rear side connectors 5, on the side facing the light by means of front side connectors 6 are interconnected. About the front-side connectors 6, a cover 8 is arranged with the adhesive 7. For covering also fluorescent configured adhesive tapes can be used. These convert the direct incident light onto them into diffuse light photons, which are mainly reflected by the front glass inwards. This is particularly suitable for use with thin-film modules.
Fig. 2 zeigt eine beidseitig kontaktierte erste Solarzelle 1 sowie eine beidseitig kontaktierte Solarzelle 2. FIG. 2 shows a first solar cell 1 contacted on both sides and a solar cell 2 contacted on both sides.
In Fig. 3 sind die kontaktierten Solarzellen 1, 2 bis zum String-Ende mit einem Tape als Abdeckung 8 dargestellt. Das Tape 8 hat eine mattschwarze Oberflächengestaltung. In Fig. 3, the contacted solar cells 1, 2 to the string end with a tape as a cover 8 are shown. The tape 8 has a matt black surface design.
Fig. 4 zeigt die Solarzellen nach Fig. 3 und das String-Ende mit einem Querverbinder 9. In Fig. 5 ist am String-Ende der Querverbinder 9 dargestellt, der ebenfalls wie die Verbinderoberflächen an den Emitterseiten der Solarzellen 1, 2 mit einer Abdeckung (einem Tape) 8 abgedeckt ist. 4 shows the solar cells according to FIG. 3 and the string end with a transverse connector 9. In Fig. 5 the cross-connector 9 is shown at the string end, which is also covered as the connector surfaces on the emitter sides of the solar cells 1, 2 with a cover (a tape) 8.
In Fig. 6 ist der String 4 aus den Solarzellen 1, 2 mit dem mattschwarzen Tape 8 dargestellt, das sowohl die Vorderseiten- Verbinder 6 als auch den Querverbinder 9 abdeckt. Dabei ist der String 4 auf einer schwarzen Rückseiten-Folie 10 einlaminiert. In Fig. 6, the string 4 of the solar cells 1, 2 is shown with the matt black tape 8 covering both the front-side connector 6 and the cross connector 9. The string 4 is laminated on a black backsheet 10.
Fig. 7 zeigt einen Schnitt durch ein Solarmodul mit einer Solarzelle 2, auf der ein Vorderseiten-Verbinder 6 angeordnet ist. Auf diesem ist eine fluoreszierende Abdeckung 11 mit einem Adhesiv 7 angeordnet. Über dieser Anordnung ist eine Glasplatte 12 angeordnet. Der Zwischenraum zwischen der Solarzelle 2 und der Glasplatte 12 wird mit einer so genannten EVA-Folie 13 ausgefüllt. Einfallendes Licht 14 wird durch die fluoreszierende Abdeckung 11 diffus abgestrahlt, diese diffusen Lichtstrahlen 15 werden durch die Glasplatte 12 auf die Solarzelle 2 zμrückgestrahlt und erhöhen damit die Lichtausbeute. 7 shows a section through a solar module with a solar cell 2, on which a front-side connector 6 is arranged. On this a fluorescent cover 11 is arranged with an adhesive 7. About this arrangement, a glass plate 12 is arranged. The gap between the solar cell 2 and the glass plate 12 is filled with a so-called EVA film 13. Incident light 14 is emitted diffusely by the fluorescent cover 11, these diffuse light beams 15 are irradiated by the glass plate 12 to the solar cell 2 and thus increase the light output.
Alle in der Beschreibung, den nachfolgenden Ansprüchen und den Zeichnungen dargestellten Merkmale können sowohl einzeln als auch in beliebiger Kombination miteinander erfindungswesentlich sein. Bezugszeichenliste All in the description, the following claims and the drawings illustrated features may be essential to the invention both individually and in any combination. LIST OF REFERENCE NUMBERS
1 erste Solarzelle 1 first solar cell
2 zweite Solarzelle  2 second solar cell
3 dritte Solarzelle  3 third solar cell
4 String  4 string
5 Rückseiten-Verbinder 5 rear-side connectors
6 Vorderseiten-Verbinder6 front-side connectors
7 Adhesiv 7 Adhesive
8 Abdeckung  8 cover
9 Querverbinder  9 cross connectors
10 Rückseiten-Folie  10 backside foil
11 fluoreszierende Abdeckung 11 fluorescent cover
12 Glasplatte 12 glass plate
13 EVA-Folie  13 EVA film
14 einfallender Lichtstrahl 14 incident light beam
15 diffuser Lichtstrahl 15 diffuse light beam

Claims

Ansprüche claims
1. Solarzellenmodul mit Solarzellenstrings (4) aus einzelnen Solarzellen (1, 2, 3), die mit Rückseiten- (5) und Vorderseitenverbindern (6) miteinander verbunden sind, dadurch gekennzeichnet, dass die Vorderseitenverbinder (6) eine Abdeckung (8, 11) oder eine Beschichtung aufweisen. Solar cell module comprising solar cell strings (4) of individual solar cells (1, 2, 3) which are connected to each other with rear side (5) and front side connectors (6), characterized in that the front side connectors (6) have a cover (8, 11 ) or have a coating.
2. Solarzellenmodul nach Anspruch 1, dadurch gekennzeichnet, dass die Abdeckung (8) oder die Beschichtung der Vorderseitenverbinder (6) eine Lichtstrahlung absorbierende Oberfläche besitzt. 2. Solar cell module according to claim 1, characterized in that the cover (8) or the coating of the front side connector (6) has a light radiation absorbing surface.
3. Solarzellenmodul nach Anspruch 1, dadurch gekennzeichnet, dass die Abdeckung (11) oder die Beschichtung fluoreszierend ausgestaltet ist. 3. Solar cell module according to claim 1, characterized in that the cover (11) or the coating is made fluorescent.
4. Solarzellenmodul nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Abdeckung (8, 11) ein Kunststoff- Klebeband ist. 4. Solar cell module according to claim 2 or 3, characterized in that the cover (8, 11) is a plastic adhesive tape.
5. Solarzellenmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Kunststoff- Klebeband aus einem Verbund von PET und einem Adhesiv (7) ausgebildet ist. 5. Solar cell module according to one of the preceding claims, characterized in that the plastic Adhesive tape is formed from a composite of PET and an adhesive (7).
6. Solarzellenmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Kunststoff- Klebeband schwarz oder mattschwarz ausgebildet ist. 6. Solar cell module according to one of the preceding claims, characterized in that the plastic adhesive tape is black or matt black.
7. Solarzellenmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Breite der Abdeckung (8, 11) der Breite des Vorderseiten verhindere (6) entspricht. 7. Solar cell module according to one of the preceding claims, characterized in that the width of the cover (8, 11) prevents the width of the front sides verhindere (6).
8. Solarzellenmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Querverbindungen (9) der Solarzellenstrings Abdeckungen (8, 11) oder Beschichtungen aufweisen. 8. Solar cell module according to one of the preceding claims, characterized in that the cross connections (9) of the solar cell strings covers (8, 11) or coatings.
9. Solarzellenmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Abdeckung (8, 11) oder die Beschichtung UV-stabil ausgestaltet sind. 9. Solar cell module according to one of the preceding claims, characterized in that the cover (8, 11) or the coating are configured UV-stable.
10. Solarzellenmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Abdeckung (8, 11) einen niedrigeren Schmelzpunkt als die niedrigste im Temperaturverlauf eines Laminierprozesses auftretende Temperatur aufweist, so dass die Abdeckung (8, 11) beim Laminierprozess nicht schmilzt und dadurch ein Verrutschen der Abdeckung (8, 11) verhindert wird. 10. Solar cell module according to one of the preceding claims, characterized in that the cover (8, 11) has a lower melting point than the lowest occurring in the course of temperature of a lamination process temperature, so that the cover (8, 11) during Lamination process does not melt and thereby slipping of the cover (8, 11) is prevented.
PCT/DE2010/001485 2009-12-17 2010-12-17 Solar cell module WO2011072658A2 (en)

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