WO1997041605A1 - Generateur solaire - Google Patents

Generateur solaire Download PDF

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Publication number
WO1997041605A1
WO1997041605A1 PCT/EP1997/002164 EP9702164W WO9741605A1 WO 1997041605 A1 WO1997041605 A1 WO 1997041605A1 EP 9702164 W EP9702164 W EP 9702164W WO 9741605 A1 WO9741605 A1 WO 9741605A1
Authority
WO
WIPO (PCT)
Prior art keywords
cells
solar generator
generator according
connectors
solar
Prior art date
Application number
PCT/EP1997/002164
Other languages
German (de)
English (en)
Inventor
Julian SCHÜREN
Original Assignee
Schueren Julian
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 Schueren Julian filed Critical Schueren Julian
Priority to AU27727/97A priority Critical patent/AU2772797A/en
Publication of WO1997041605A1 publication Critical patent/WO1997041605A1/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
    • H01L31/0508—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
    • 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
    • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • H01L31/0201—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
    • 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 solar generator with the features of the preamble of claim 1.
  • Such solar generators are known from practice. Crystalline silicon solar cells deliver a voltage of around 0.5 V when irradiated with sunlight. In order to achieve a higher voltage, individual solar cells are combined to form solar modules, the solar cells being connected in series. The surface facing the light has a different polarity than the surface of the solar cell facing away from the light. For electrical series connection, two adjacent solar cells are connected via a connector in such a way that the underside of one solar cell is in electrical connection with the top of the other solar cell. The solar cells to be connected in series are arranged next to one another in solar generators or solar modules, so that an essentially straight row, a so-called string, results. Several strings are also arranged side by side in a solar module in order to be able to implement different dimensions.
  • Each series connection can, for example, have as many solar cells include how they are required to achieve a useful voltage of 12 V, for example.
  • a plurality of solar cells can also be connected in parallel within a solar module or solar generator, which leads to a higher current yield and greater operational reliability in the event of the failure of a single cell.
  • the solar cells arranged in strings are usually connected to one another in the region of their mutually facing end faces by an electrical conductor which extends approximately in a Z shape from the underside of one solar cell to the top of the other solar cell. These electrical connectors extend along the shortest distance between the two solar cells to be connected, which is approximately 2-4 mm.
  • the series-connected solar cells in a string are au in the known solar generators on a solid and stei ⁇ fen carrier, generally ei * .- glass plate: put and fixed there.
  • This Glaspia :::, e generally also serves as a front cover and thus as protection against external mechanical and weather influences.
  • the carrier plate is usually held in a rigid frame, so that a rigid solar generator results overall.
  • the known solar generators are rela- tiv heavy, not flexible and limited in their application possibilities.
  • the connectors running in the direction of the string lie alongside the cells over a substantial part of their longitudinal extent, on the one hand, with a flexible carrier material, these connectors can be arranged near the neutral fiber of the solar generator and are therefore only subject to ge slight tensile or compressive stresses when the carrier material is bent.
  • the connectors lying next to the solar cells can be adapted in terms of their length and their coefficient of thermal expansion so that the thermal expansion of the carrier material is compensated for. It is advantageous if the part of the connector lying next to the cells corresponds to 0.5 to 2.0 times the length of the cells in the direction of the string.
  • Electrically conductive carrier materials can be used if electrical insulation, for example in the form of an insulating film, is provided between the connectors and the carrier.
  • a simple manufacture of a solar generator according to the invention results if the plate-shaped cells each carry at least one connection element which is arranged on a flat side of the cell and which projects beyond the cell at least on an edge side.
  • the connectors can then be contacted with the connection element by soldering or welding. Simple geometric relationships result when the two connection elements of a cell with different electrical polarities are approximately symmetrical are arranged with respect to the center of the flat side of this cell. It is also advantageous if the connector and the connection elements are elongated and adjoin one another in an obtuse angle.
  • connection elements can be brought very close to the carrier material and, if necessary, can be attached to the carrier material in a flexible manner if the connection elements are at least partially designed as a U-shaped clamp which surround the cells on the edge and which on the carrier wear a connection lug on the opposite side.
  • the connectors can then be designed in a band-like and straight manner, in particular between the connection elements, which is advantageous for a simple, flexible and nevertheless relatively short electrical connection.
  • the material stresses due to temperature fluctuations are compensated particularly well if the length 1 of the connector to the center distance a of the cells is like the coefficient of thermal expansion W ⁇ of the support to the coefficient of thermal expansion W v of the connector.
  • FIG. 1 shows two solar cells which are connected according to the invention in a row;
  • Figure 2 shows the arrangement of Figure 1 m a side view.
  • FIG. 3 shows another connection possibility for solar cells according to FIG. 1 with contact elements guided around the side edges;
  • Fig. 4 shows a series connection of 4 solar cells
  • Connector and the connecting elements are in one piece; such as
  • FIG. 5 shows a series connection of 6 solar cells to form a solar generator, which are arranged on a film printed with conductor tracks.
  • FIG. 1 shows a top view of its illuminated side of two plate-shaped solar cells 1, which are arranged in a common plane and which each have a long narrow side 2 or 3 opposite one another.
  • the solar cells 1 On their visible surface 4, which faces the light source during operation, the solar cells 1 each have a connecting element 5 which runs parallel to the long narrow sides 2 and 3 and which has negative polarity when using positively predoped solar cell material.
  • a corresponding connecting element 6 with a positive polarity during operation is provided on the surface facing away from the light source and not visible in FIG. 1.
  • the solar cells 1 each have two short narrow sides 7, which are exceeded by the connecting elements 5 and 6.
  • two connectors 8 are used, which run from the connecting element 5 of one solar cell 1 to the connecting element 6 of the other solar cell 1 and are connected to these End elements are connected in an electrically conductive manner, that is to say are welded or soldered, for example.
  • connection element 5 shows the connection of the two solar cells 1 according to FIG. 1 in a side view. It can be seen that the connection elements 5 are arranged on the surface 4 of the solar cells 1, while the connection elements 6 are located on the opposite surface, here designated 11.
  • the connecting element 8 runs essentially rectilinearly from the connecting element 5 to the connecting element 6. However, it can also initially run horizontally in the plane of the connecting elements 6 and then be angled upward to the connecting element 5 at the height of the connecting element 5.
  • connection elements 5 are angled downward in the area in which they protrude the solar cells 1 over the short narrow sides 7 and folded in a U-shape.
  • connection elements 5 which are designed in the manner of wrap-around contacts, allow the connector 8 to be arranged in a straight line between the connection element 5 and its wrap-around contact and the adjacent connection element 6 of opposite polarity of the next solar cell.
  • FIG. 4 shows an embodiment of the present invention, in which the connection of the individual solar cells 1 takes place via a metallic support structure which can be manufactured and handled by machine.
  • a positive electrical connection 20 and a negative electrical connection 21 with a relatively large cross section are provided, between which the solar cells 1 are arranged.
  • Essentially ⁇ chen U-shaped segments 22 and 23 are integrally formed on the connections 20 and 21, respectively
  • Two short legs 25 at right angles to the connections 20 and 21 and parallel to the short narrow sides 7 of the solar cells 1.
  • the connecting elements 5 and 6 are electrical lei ⁇ tend connected to the solar cells 1, which are directly adjacent to the terminals 20 and 21.
  • annular, integral connectors 27 with a rectangular shape are provided, each of which is aligned with its short sides parallel to the short legs 25 and with its long sides parallel to the connection elements 5 and 6, respectively.
  • the long sides of the annular element 27 form the connection elements of the solar cells 1 and are electrically contacted on opposite sides of two adjacent solar cells, so that these are electrically connected to one another via the short legs and the connection elements of these annular elements 27.
  • a simple, automatable possibility of producing such solar generators results if the short legs 25 of the U-shaped connection elements and the short legs of the ring-shaped elements 27 are initially connected to one another in a straight line.
  • Such a connection structure can be produced from a sheet metal in a simple manner by punching out rectangular areas.
  • connection elements 5 and 6 can then be bent slightly apart, so that the solar cells 1 are inserted between the connection elements 5 and 6 and electrically connected there. can be clocked. Then, for the electrical separation of the connection elements of positive and negative polarity from each other, approximately square areas are punched out, one of which is designated by way of example with 28 in FIG. In this way, the individual connecting elements 27 are separated from the connections 20 and 21 and from one another, so that an electrical series connection is produced.
  • Several solar cells connected in series, which together form a string can also be connected in parallel. For this purpose, corresponding arrangements of solar cells are simply to be arranged next to one another between the connections 20 and 21.
  • a short leg 29 provided for this purpose and only partially shown is indicated at the connections 20 and 21.
  • FIG. 5 shows an embodiment of the present invention, in which six solar cells 1 are connected in series, the carrier material being a flexible film 30 and electrical connections 31 being printed on the film.
  • the individual solar cells 1 are provided with the connection elements 5 and 6 on opposite sides, as is already shown in FIGS. 1 to 3.
  • the connecting elements 31, each running parallel to the short narrow sides 7 of the solar cells 1, are printed onto the carrier film 30 as electrical conductor tracks using thick-film technology.
  • an electrically conductive, printable paste m which can be soldered or welded, is used.
  • the connectors 31 are arranged in a straight line, each interrupted at the points at which the connecting elements 5 and 6 are electrically contacted with the connectors 31.
  • connection of the connection element 5 of a solar cell 1 arranged at the top with the connector 31 lying in the plane below, which is printed on the film 30, is facilitated in that the connection element 5 except for the plane of the film 30 is angled down and therefore forms a step in the region of the short narrow side 7.
  • the electrical taps of the solar generator according to FIG. 5 are not shown in FIG. 5, but they are arranged in an obvious manner at the respective ends of the connecting elements 31.
  • the mechanical load on the solar generators according to the invention when the individual solar cells 1 are angled toward one another is kept low by the fact that the connectors 8 between the connection elements 5 and 6 are located laterally next to the solar cells and have good flexibility due to their relatively large free length exhibit.
  • the stress caused by thermal influences namely by different thermal expansion of the various materials used, can be almost completely compensated in the following way.
  • the geometric center points of the individual solar cells 1 are designated by M in FIG. Approximately in the area of the center points M, the solar cells 1 are glued to the underlying carrier material.
  • the center points M have a linear distance a in the direction of the string from one another.
  • the connectors 8 arranged outside the solar cells 1 run parallel to the direction of the shortest distance a, that is to say in the string direction, and have the length 1.
  • the length 1 can be, for example, 90% of the center distance a.
  • a carrier material that has a coefficient of thermal expansion W ⁇ , it will be removed ⁇
  • the center points M when the carrier material is heated by a » ⁇ T * W ⁇ away from each other.
  • the thermal expansion of the connection elements 8 must absorb this thermal expansion between the center distances M.
  • the thermal expansion of the solar cell material crystalline silicon
  • the thermal expansion W v of the connector 8 must be greater than the thermal expansion W ⁇ of the carrier material if the connector 8 is shorter than the center distance a.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Sustainable Energy (AREA)
  • Photovoltaic Devices (AREA)

Abstract

Ce générateur solaire comprend un support, une pluralité de cellules solaires plates (1) et des connecteurs électroconducteurs (8) qui interconnectent les cellules solaires (1) en série. Au moins une partie des cellules solaires (1) forme une rangée sensiblement rectiligne et les connecteurs (8) qui s'étendent dans la direction de la rangée se situent sur une grande partie de leur longueur à côté des cellules solaires (1).
PCT/EP1997/002164 1996-04-30 1997-04-26 Generateur solaire WO1997041605A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU27727/97A AU2772797A (en) 1996-04-30 1997-04-26 Solar generator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19617220A DE19617220A1 (de) 1996-04-30 1996-04-30 Solargenerator
DE19617220.9 1996-04-30

Publications (1)

Publication Number Publication Date
WO1997041605A1 true WO1997041605A1 (fr) 1997-11-06

Family

ID=7792858

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/002164 WO1997041605A1 (fr) 1996-04-30 1997-04-26 Generateur solaire

Country Status (3)

Country Link
AU (1) AU2772797A (fr)
DE (1) DE19617220A1 (fr)
WO (1) WO1997041605A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1255303A1 (fr) * 2000-10-20 2002-11-06 Josuke Nakata Module a semi-conducteur emetteur ou recepteur de lumiere et procede de fabrication dudit module

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005039952A1 (de) * 2005-08-24 2007-03-08 Siegfried Renn Photovoltaisches Solarmodul

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097460A5 (fr) * 1970-07-07 1972-03-03 Radiotechnique Compelec
EP0103168A2 (fr) * 1982-09-10 1984-03-21 Hitachi, Ltd. Pile solaire en silicium amorphe
EP0111394A2 (fr) * 1982-11-09 1984-06-20 Energy Conversion Devices, Inc. Bande stratifiée de cellules solaires de grande surface et méthode de production de cette bande stratifiée
US5006179A (en) * 1989-05-24 1991-04-09 Solarex Corporation Interconnect for electrically connecting solar cells
WO1991018419A1 (fr) * 1990-05-21 1991-11-28 The Boeing Company Module concentrateur terrestre a cellules solaires
EP0499075A1 (fr) * 1991-02-12 1992-08-19 Nukem GmbH Procédé et dispositif pour fabriquer une suite de cellules solaires

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3105352A1 (de) * 1981-02-13 1982-09-09 Siemens AG, 1000 Berlin und 8000 München Anordnung zur anzeige einer funktionsstoerung bei solarzellen
FR2514565B1 (fr) * 1981-10-09 1985-11-29 Exxon Research Engineering Co Ensemble a pile solaire et procede de fixation d'une barre omnibus a une pile solaire
US4443652A (en) * 1982-11-09 1984-04-17 Energy Conversion Devices, Inc. Electrically interconnected large area photovoltaic cells and method of producing said cells
US4849028A (en) * 1986-07-03 1989-07-18 Hughes Aircraft Company Solar cell with integrated interconnect device and process for fabrication thereof
DE3942031C1 (fr) * 1989-12-20 1991-06-06 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De
US5296043A (en) * 1990-02-16 1994-03-22 Canon Kabushiki Kaisha Multi-cells integrated solar cell module and process for producing the same
DE4017933A1 (de) * 1990-06-05 1991-12-12 Telefunken Systemtechnik Solarzellenelement mit einem deckglas
DE4038646A1 (de) * 1990-12-04 1992-06-11 Siemens Ag Solarzellenanordnung
DE4337128A1 (de) * 1993-11-01 1995-05-04 Deutsche Aerospace Photovoltaischer Solargenerator
DE19528211A1 (de) * 1995-08-01 1995-12-21 Albert Edelmann Photovoltaikmodul für Lärmschutzanlagen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097460A5 (fr) * 1970-07-07 1972-03-03 Radiotechnique Compelec
EP0103168A2 (fr) * 1982-09-10 1984-03-21 Hitachi, Ltd. Pile solaire en silicium amorphe
EP0111394A2 (fr) * 1982-11-09 1984-06-20 Energy Conversion Devices, Inc. Bande stratifiée de cellules solaires de grande surface et méthode de production de cette bande stratifiée
US5006179A (en) * 1989-05-24 1991-04-09 Solarex Corporation Interconnect for electrically connecting solar cells
WO1991018419A1 (fr) * 1990-05-21 1991-11-28 The Boeing Company Module concentrateur terrestre a cellules solaires
EP0499075A1 (fr) * 1991-02-12 1992-08-19 Nukem GmbH Procédé et dispositif pour fabriquer une suite de cellules solaires

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1255303A1 (fr) * 2000-10-20 2002-11-06 Josuke Nakata Module a semi-conducteur emetteur ou recepteur de lumiere et procede de fabrication dudit module
EP1255303A4 (fr) * 2000-10-20 2005-11-16 Josuke Nakata Module a semi-conducteur emetteur ou recepteur de lumiere et procede de fabrication dudit module

Also Published As

Publication number Publication date
DE19617220A1 (de) 1997-11-06
AU2772797A (en) 1997-11-19

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