Die Erfindung betrifft einen photovoltaischen Solargenerator, dessen Solarzellen an den Längskanten Kontaktanschlüsse aufweisen und in überlappender Form zu einem Schindelstring zusammengefaßt sind, wobei mehrere Schindelstrings vorzugsweise zwischen einem Träger und einer Abdeckung in Schmelzkleberfolien eingebettet sind.The invention relates to a photovoltaic solar genesrator, whose solar cells contact at the longitudinal edgeshave conclusions and overlap to oneShingle string are combined, with multiple shinglesstrings preferably between a carrier and an abcover are embedded in hot-melt adhesive films.
Photovoltaische Solargeneratoren, deren Solarzellen in Schindeltechnik angeordnet sind, gelten in der Fachwelt als allgemein bekannt. Die Schindelstrings liegen beispielsweise in Schmelzkleberfolien eingebettet zwischen einem Träger aus beispielsweise Glas oder Metall, vorzugsweise Aluminium, und einer Abdeckung, insbesondere aus Glas.Photovoltaic solar generators, whose solar cells inShingle technology are arranged in the professional worldas generally known. The shingle strings are, for exampleembedded in a hot melt adhesive film between oneCarriers made of, for example, glass or metal, preferablyAluminum, and a cover, especially of glass.
Die Herstellung derartiger Solargeneratoren kann beispielsweise dadurch erfolgen, daß die Schindelstrings durch Aufeinanderlegen der die Kontaktanschlüsse enthaltenden Längskanten der Solarzellen und durch anschließendes Kleben oder Löten der Kontaktanschlüsse jeweils der benachbarten Solarzellen hergestellt werden. Bei den Kontakten kann es sich um im Siebdruckverfahren aufgebrachte oder um in Vakuumtechnik aufgedampfte Mehrschicht-Metallkontakte handeln, die einen Anschlußbalken oder Anschlußbereiche an einer Längskante der Solarzelle aufweisen. Anschließend werden die Schindelstrings untereinander verschaltet, mit elektrischen Anschlüssen versehen und in den Schmelzkleberfolien eingebettet. Der mit einer Abdeckung und einem Träger versehene Generatorverbund wird abschließend in einem Vakuum-Verbundprozeß zu dem photovoltaischen Solargenerator laminiert. Es hat sich bei den beschriebenen Solargeneratoren herausgestellt, daß im Bereich der Kontaktverbindungen durch Temperaturwechsel-Kräfte im Generatormodul nachteiligerweise Zellenbrüche aufgetreten sind, insbesondere bei einer Rückseitenabdeckung aus Aluminium.The production of such solar generators can for examplewise done in that the shingle strings by Onthe longitudinal axis containing the contact connections lie one above the otheredges of the solar cells and by subsequent gluing orSolder the contact connections of the neighboring solarcells are manufactured. The contacts can beapplied by screen printing or in vacuum technologyevaporated multi-layer metal contacts act, the oneConnection bars or connection areas on one longitudinal edgeof the solar cell. Then the shinglestrings interconnected, with electrical connectionprovided conclusions and embedded in the hot melt adhesive filmstet. The one with a cover and a supportThe generator network is finally created in a vacuum networkProcess laminated to the photovoltaic solar generator. Ithas emerged from the described solar generatorsrepresents that in the area of contact connections by Temperaturwechsel forces in the generator module disadvantageously Zelfractures have occurred, especially on the backaluminum cover.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Solargenerator der eingangs genannten Art zu schaffen, bei dem ein Bruch der Solarzellen nach Herstellung des Solargenerators aufgrund von Temperaturwechsel-Kräften vermieden wird.The invention is therefore based on the objectto create largenerator of the type mentioned atwhich is a break in the solar cells after the solar has been manufacturedgenerators avoided due to temperature change forcesbecomes.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß räumlich zwischen den elektrisch leitend zu verbindenen Kontaktanschlußbalken oder Kontaktinsel der Solarzellen Zwischenverbinder angeordnet sind.The object is achieved in that spaceLich between the electrically conductive contact to be connectedconnection bar or contact island of the solar cellsIntermediate connectors are arranged.
Durch den erfindungsgemäßen Zwischenverbinder werden infolge der besonderen Formgebung der elastischen Verbindungsstege die Temperaturwechselkräfte sehr gut aufgenommen, so daß Zug- oder Druckkräfte nicht in den Kristrallbereich der Solarzelle eingeleitet werden können.As a result of the intermediate connector according to the inventionthe special shape of the elastic connecting websthe temperature change forces very well absorbed, so thatTensile or compressive forces not in the crystal area of the sunlar cell can be initiated.
Die durch die Schindeltechnik erzielbare optimale Flächenausnutzung im Generator infolge des Wegfalls von Zwischenräumen zwischen den Zellen, sowie die Überdeckung von Kontaktflächen durch aktive Zellenflächen bleibt vorteilhafterweise voll erhalten.The optimal areas that can be achieved with shingle technologyutilization in the generator due to the elimination of intermediateclear between the cells, as well as the coverage of Kontact areas by active cell areas remains advantageousfully preserved.
Ausgestaltungen der Erfindung sind in den Unteransprüchen 2 bis 7 beschrieben.Embodiments of the invention are in the subclaims2 to 7 described.
In der Zeichnung ist ein Ausführungsbeispiel nach der Erfindung dargestellt, und zwar zeigtIn the drawing is an embodiment according to the Ershown, namely shows
Fig. 1 einen Zwischenverbinder in Draufsicht,Fig. 1 is an intermediate connector in plan view,
Fig. 2 die Anordnung des Zwischenverbinders gemäßFig. 1 zwischen den Kontaktanschlüssen der geschindelten Solarzellen in der Seitenansicht, undFig. 2 shows the arrangement of the intermediate connector ofFIG. 1 between the contact connections of the shingled solar cells in a side view, and
Fig. 3 ein Ausführungsbeispiel eines Strings mit drei Solarzellen in Drauf- und Seitenansicht.Fig. 3 shows an embodiment of a string with three solar cells in top and side views.
InFig. 1 weist ein 0,1 mm flach ausgeführter Verbinder1 praktisch eine rechteckige Form auf, wobei an den gegenüberliegenden Längsseiten Löt- bzw. Schweißanschlüsse4,6 angeordnet sind. Zwischen diesen beiden Anschluß-Seiten4,6 befindet sich ein elastisch ausgebildeter Bereich8, der die elastische Verformung in Längsrichtung übernimmt. Der zwischen den Anschlüssen4,4 und6,6 in Querrichtung liegende Bereich9 kann eine elastische Verformung in Querrichtung übernehmen. Der beschriebene Zwischenverbinder ist inFig. 2 als Einzelverbinder mit hoher Redundanz zwischen dem Vorderseitenkontaktanschluß2 der Solarzelle11 und dem Rückseitenkontaktanschluß3 der Solarzelle10 mechanisch und elektrisch über die Schweiß- bzw. Lötverbindungen5,7 verbunden.InFig. 1, a 0.1 mm flat connector1 practically has a rectangular shape, with soldering or welding connections4 ,6 being arranged on the opposite longitudinal sides. Between these two connection sides4 ,6 there is an elastically formed area8 , which takes over the elastic deformation in the longitudinal direction. The area9 lying between the connections4 ,4 and6 ,6 in the transverse direction can take on an elastic deformation in the transverse direction. The intermediate connector described is inFig. 2 as a single connector with high redundancy's between the front contact terminal2 of the solar cell11 and the rear contact terminal3 of the solar cell10 me mechanically and electrically via the welding or soldering gene5 ,7 connected.
Die Zwischenverbinder1 können vorzugsweise aus Kupfer, Molybdän, Nickel, Silber oder deren Legierungen bestehen, wobei die Materialdicke den zu verschaltenden Solarzellen anzupassen ist. Je nach Material und Anforderung können die Zwischenverbinder1 gestanzt, geätzt oder auch in Galvanoformtechnik hergestellt werden.The intermediate connectors1 can preferably consist of copper, molybdenum, nickel, silver or their alloys, the material thickness having to be adapted to the solar cells to be connected. Depending on the material and requirements, the intermediate connectors1 can be punched, etched or also produced using electroforming technology.
Die inFig. 1 dargestellten Öffnungen12 können zur Positionierung der Zwischenverbinder1 bei der Herstellung des Strings13 inFig. 3 dienen.The openings12 shown inFig. 1 can serve to position the intermediate connector1 in the manufacture of the string13 inFig. 3.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4030713ADE4030713A1 (en) | 1990-09-28 | 1990-09-28 | Photoelectric solar generator - has flexible intermediate connecting plate designed to prevent solar cell fracture due to temp. change stresses |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4030713ADE4030713A1 (en) | 1990-09-28 | 1990-09-28 | Photoelectric solar generator - has flexible intermediate connecting plate designed to prevent solar cell fracture due to temp. change stresses |
| Publication Number | Publication Date |
|---|---|
| DE4030713A1true DE4030713A1 (en) | 1992-04-02 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4030713ACeasedDE4030713A1 (en) | 1990-09-28 | 1990-09-28 | Photoelectric solar generator - has flexible intermediate connecting plate designed to prevent solar cell fracture due to temp. change stresses |
| Country | Link |
|---|---|
| DE (1) | DE4030713A1 (en) |
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| Date | Code | Title | Description |
|---|---|---|---|
| 8127 | New person/name/address of the applicant | Owner name:DEUTSCHE AEROSPACE AG, 8000 MUENCHEN, DE | |
| 8110 | Request for examination paragraph 44 | ||
| 8120 | Willingness to grant licences paragraph 23 | ||
| 8127 | New person/name/address of the applicant | Owner name:DAIMLER-BENZ AEROSPACE AKTIENGESELLSCHAFT, 80804 M | |
| 8131 | Rejection |