EP4309210A1 - Procédé de fabrication d'une chaîne de cellules solaires, chaîne de cellules solaires, dispositif de traitement pour une chaîne de cellules solaires, et utilisation d'un tel dispositif de traitement pour la fabrication d'une chaîne de cellules solaires - Google Patents

Procédé de fabrication d'une chaîne de cellules solaires, chaîne de cellules solaires, dispositif de traitement pour une chaîne de cellules solaires, et utilisation d'un tel dispositif de traitement pour la fabrication d'une chaîne de cellules solaires

Info

Publication number
EP4309210A1
EP4309210A1 EP22716195.7A EP22716195A EP4309210A1 EP 4309210 A1 EP4309210 A1 EP 4309210A1 EP 22716195 A EP22716195 A EP 22716195A EP 4309210 A1 EP4309210 A1 EP 4309210A1
Authority
EP
European Patent Office
Prior art keywords
solar cell
solar cells
solar
connecting element
cell
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.)
Pending
Application number
EP22716195.7A
Other languages
German (de)
English (en)
Inventor
Jan Tobias PASCHEN
Jan Nekarda
Andreas Brand
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP4309210A1 publication Critical patent/EP4309210A1/fr
Pending legal-status Critical Current

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
    • 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
    • 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
    • H01L31/043—Mechanically stacked PV 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
    • H01L31/05—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
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/1876—Particular processes or apparatus for batch treatment of the devices
    • H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
    • 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

  • Processing device for a solar cell string and use of such a processing device for the production of a solar cell string
  • the invention relates to a method for producing a solar cell string according to claim 1, a solar cell string according to claim 12, a processing device for a solar cell string according to claim 13 and the use of a processing device for producing a solar cell string according to claim 14.
  • Photovoltaic solar cells are typically used to convert electromagnetic radiation into electrical energy with a solar cell module that has a plurality of solar cells.
  • Such solar cell modules typically have a plurality of solar cell strings.
  • a solar cell string comprises a number of solar cells which are connected to one another in an electrically conductive manner.
  • the solar cells in a solar cell string are typically connected in series, since a single solar cell generates a rather low voltage but a high current.
  • Typical solar cells have two metallic contacting structures, so-called electrodes.
  • a p-electrode is electrically conductively connected to a p-doped area of the solar cell and an n-electrode is electrically conductively connected to an n-doped area of the solar cell.
  • the series connection of solar cells in a solar cell string typically takes place by means of a rigid cell connector, which electrically conductively connects the metallic contact structure of a solar cell to a metallic contact structure of an adjacent solar cell.
  • the electrically conductive connection is used to form a series circuit, so that the n-electrode of one solar cell is electrically conductively connected to the p-electrode of the neighboring solar cell, or vice versa.
  • a cell connector has disadvantages in terms of handling when manufacturing the solar cell string.
  • mechanical stresses due to mechanical stress on the solar cell string in particular due to thermal stress, can lead to an increase in the contact resistance between the cell connector and the solar cell and even to a contact interruption when the cell connector is detached.
  • these rigid cell connectors exert thermomechanical stress on the cells, which can lead to cell rupture.
  • the object of the present invention is therefore to provide such a method for producing a solar cell string and such a solar cell string.
  • This object is achieved by a method for producing a solar cell string according to claim 1, a solar cell string according to claim 12, a processing device for a solar cell string according to claim 13 and use of such a processing device to carry out the method according to the invention.
  • the method according to the invention for producing a solar cell string according to claim 1 has method steps A and B:
  • a solar cell stack is provided with at least 5 solar cells, each of which has a front side and a back side, the solar cells being arranged in an overlapping manner, so that in each solar cell there is a peripheral contact area on the front side of the solar cell and an edge contact area on the Back of the solar cell is not covered by an adjacent solar cell.
  • electrically conductive connections are formed between the solar cells
  • the method according to the invention enables a particularly cost-effective formation of a solar cell string, since only two connecting elements are applied to the solar cell stack, which are only isolated after the electrical connection with the solar cells in cell connectors, which electrically conductively connect two adjacent solar cells in the subsequent solar cell string .
  • the electrical interconnection of the solar cells in the solar cell string is advantageously carried out in a manner known per se, the front side of a solar cell being electrically conductively connected to the rear side of an adjacent solar cell in the solar cell string.
  • typical solar cells each have a metallic electrode on the front and on the back.
  • the metallic electrode on the front side of a solar cell is electrically conductively connected to the metallic electrode on the back side of the adjacent solar cell or vice versa by the cell connector.
  • the solar cells in the stack are arranged on front sides facing one another or back sides facing one another, in particular are arranged alternating front sides facing one another and rear sides facing one another.
  • the solar cells are arranged in an alternating order with the front sides facing each other and the back sides facing each other in ascending order, or vice versa, starting with the back sides facing each other, the front sides facing each other and continuing in an alternating sequence.
  • the first connecting element is arranged on the first side of the solar cell stack and the second connecting element is arranged on the second side of the solar cell stack and the two connecting elements are then divided into the first and second groups of cell connectors. It is advantageous to separate the first connecting element before arranging the second connecting element in order to form the first group of cell connectors. This has the advantage that the processing on the first side of the solar cell stack can be completed before the processing on the second side of the solar cell stack takes place.
  • the solar cell stack is turned over between arranging the first connecting element and arranging the second connecting element.
  • step B in addition to the dividing of the first and second connecting element, excess material of the first and second connecting element is removed.
  • a solar cell stack with solar cells is formed, with two superimposed solar cells being electrically conductively connected to one another by a cell connector through the first and second group of cell connectors.
  • a solar cell string arrangement is advantageously formed after method step B by rotary movements of the solar cells from the stack arrangement, with solar cells lying next to one another or with solar cells arranged in a shingle arrangement.
  • a further advantage of the method according to the invention is that the method for forming a solar cell string, in which the solar cells are arranged in a row next to one another in one plane, is suitable as well as for the formation of a shingle arrangement.
  • a shingle arrangement of solar cells is known per se, the solar cells are arranged in an overlapping manner in the manner of shingles, so that each solar cell slightly overlaps an adjacent solar cell on one side and is slightly overlapped on another side by another adjacent solar cell.
  • the electrically conductive connection of the first and second connecting element to the solar cells is formed in a manner known per se, in particular preferably by the action of heat. It is within the scope of the invention that the electrically conductive connection is made by means of soldering and in particular by direct contact with a heated soldering element. It is also within the scope of the invention to form the electrically conductive connection by means of gluing, in particular by means of conductive adhesive.
  • method step B it is particularly advantageous, in method step B, to carry out the formation of electrically conductive connections between the first and the second connecting element with the solar cells by means of laser radiation. It is known per se to generate heat by means of laser radiation in order to form an electrically conductive connection between two metal surfaces.
  • precision units known per se in particular precision units with lasers and laser deflection units, can be used. It is therefore particularly advantageous that, in method step B, the first and second connecting elements are divided and the first and second connecting elements are electrically connected to the solar cells by means of laser radiation. This enables both process steps to be processed quickly and inexpensively.
  • step A at least the outer sides of the two terminal solar cells of the solar cell LenStacks one end connector is arranged and is electrically conductively connected to the outer lying the solar cell. Each of the two solar cells on the outside is thus electrically conductively connected to an end connector.
  • one of the end connectors is preferably electrically conductively connected to the first connecting element in method step B and the other end connector is electrically connected to the second connecting element.
  • both end connectors are preferably electrically conductively connected to the same connecting element, particularly preferably to the first connecting element.
  • process steps A and B not only is an electrical connection of the solar cells of the solar cell string achieved, but also an electrical connection of the first solar cell of the solar cell string with one of the connectors and the last solar cell of the solar cell string with the other end connector in a process-economical manner.
  • the end connectors are preferably in the form of metallic elements, in particular in the form of elongated metallic elements, which preferably have a length which corresponds to the edge length of the solar cells transversely to the longitudinal extension of the solar cell string.
  • the first and the second connecting element are preferably designed as a flexible connecting element. As a result, the mechanical stress on the contact surfaces between the cell connectors and the solar cells is reduced and a smaller distance between the solar cells in the solar cell string is possible compared to rigid cell connectors.
  • the thickness of the first and second connecting element and thus also of the cell connector is preferably less than 100 ⁇ m, particularly preferably less than 50 ⁇ m, more preferably less than 20 ⁇ m.
  • the thickness is preferably in the range from 5 ⁇ m to 30 ⁇ m. It is within the scope of the invention to form the connecting elements as coated connecting elements, in particular metallically coated connecting elements, preferably metallically coated foils.
  • first and the second connecting element are designed as a metal foil, preferably as a single-layer metal foil.
  • a cost-effective element that can be produced cost-effectively in comparison to coated or multi-layer films is used as the cell connector.
  • typical solar cells have an electrically conductive electrode on the front and on the back, at least in the contact area.
  • such solar cells are provided which have an electrically conductive electrode on the front and on the rear at least in the contacting area, and in method step B the first and the second connecting element are electrically conductively connected to the electrodes of the solar cells.
  • an electrical series connection of solar cells in a solar cell string is advantageous.
  • the solar cells are electrically connected in series by means of the first and second groups of cell connectors.
  • the method according to the invention also has the advantage that the cell connector only slightly covers the solar cells in a direction in which the solar cell string extends, at least on the front side of the solar cells.
  • a cell connector overlapping area in which the cell connector on the front side covers the solar cell, in particular an electrode arranged on the front side of the solar cell therefore preferably has a width of less than 1000 ⁇ m, in particular less than 500 ⁇ m, preferably less than 300 ⁇ m on. This width thus extends perpendicularly to the edge of the solar cell on which the cell connector is arranged and parallel to the extension direction of the solar cell string.
  • the width of the contact area is preferably more than 100 ⁇ m, more preferably more than 200 ⁇ m, in particular more than 250 ⁇ m, in order to form a mechanically stable connection between the cell connector and the solar cell.
  • the method according to the invention enables the solar cell to be covered perpendicularly to the extension direction of the solar cell over a large length, so that a mechanically well adhering contact and an electrical contact with a low contact resistance are formed.
  • the cell connector overlap area in which the cell connectors cover the front sides of the solar cell, has a length that is greater than 80%, preferably greater than 90%, particularly preferably greater than 95% of the side length of the solar cell and thus the width of the solar cell string.
  • This length of the contacting area thus extends parallel to the edge on which the cell connector is arranged and perpendicular to the direction in which the solar cell string extends.
  • the present invention is further achieved by a solar cell string according to claim 12.
  • the solar cell string has at least five solar cells, each solar cell having an electrode on the front and an electrode on the back, the solar cells are arranged in a row along a longitudinal extension of the solar cell string and are electrically connected in series, the electrode on the front of a Solar cell is electrically connected by means of a cell connector with the electrode on the back of an adjacent solar cell.
  • the cell connectors are designed as flexible cell connectors and each cell connector has at least one fold, preferably precisely one fold with partial areas of the cell connectors lying parallel one on top of the other, with the opening of the fold running perpendicular to the longitudinal extension of the solar cell string and along the longitudinal extension of the solar cell string around the opening side of the folding is alternating.
  • adjacent pairs of solar cells thus alternately have openings in the fold of the cell connectors facing one another and openings in the fold of the cell connectors facing away from one another.
  • This advantageous embodiment results from the method according to the invention with arranging the cell connectors on the solar cell stack and then folding the solar cell stack open to form the solar cell string. It is within the scope of the invention that the inventive Solar cell string is formed with solar cells lying side by side in one plane or with solar cells in a shingle arrangement.
  • a processing device for a solar cell string according to claim 13 .
  • the processing device has a plurality of bearing surfaces for a plurality of solar cells, the bearing surfaces being arranged in steps and parallel to one another. This enables the formation of a solar cell stack for providing the solar cell stack according to method step A in a simple manner.
  • the steps, which are formed by the contact surfaces thus preferably have a step height that corresponds approximately to the total thickness of the solar cell, preferably deviating from the total thickness of the solar cell by less than 50%, in particular less than 30%.
  • the width of the bearing surface is preferably smaller than the width of the solar cell that is placed on the bearing surface; the width of the bearing surface of the contacting device particularly preferably corresponds to the solar cell surface minus the contacting area.
  • each solar cell of the solar cell stack is placed in a partial area on a support surface of the processing device and the solar cells have a greater width than the width of the bearing surfaces.
  • the solar cell string according to the invention is preferably produced by means of the method according to the invention, in particular a preferred embodiment thereof.
  • the method according to the invention is preferred for training of the solar cell string according to the invention, in particular a preferred embodiment thereof.
  • the present invention is not limited to the production of solar cell strings with five solar cells. It is particularly within the scope of the invention that the solar cell stack has five to twenty solar cells and all solar cells of the solar cell stack are electrically connected to one another according to the method according to the invention, in particular an advantageous embodiment, by means of the first and second groups of cell connectors, in particular in series connection.
  • the solar cell stack preferably has more than five, preferably more than eight, particularly preferably more than 10 solar cells.
  • FIG. 1 and FIG. 2 partial steps of method step B of an exemplary embodiment of the method according to the invention
  • FIG. 3 shows a side view and a plan view from above of a first exemplary embodiment of a solar cell string according to the invention
  • FIG. 4 shows a side view and a plan view from above of a second exemplary embodiment of a solar cell string according to the invention
  • FIG. 5 shows a sectional drawing of an exemplary embodiment of a processing device according to the invention.
  • FIG. 6 is a plan view from above of the processing device shown in FIG.
  • a method step A has already taken place, in which a solar cell stack with five solar cells 1 in the present case was provided.
  • the solar cells 1 each have a front and a back, the solar cells being arranged overlapping so that in each solar cell a peripheral contacting area 2 on the front and an edged contacting area 3 on the back is not covered by an adjacent solar cell.
  • the solar cells 1 in the solar cell stack are thus arranged parallel to one another and form steps as a result of the only partial overlap.
  • Method step B involves arranging an electrically conductive first connecting element 4, which is designed as a metal foil.
  • the first connecting element 4 follows approximately the stepped shape on a first side of the solar cell stack on the left in FIG. 1 and by means of laser beams, which are shown in FIG Connections of the first connecting element 4 on the first side of the solar cell stack to the contacting areas 2, 3 of the solar cells 1 on the first side of the solar cell stack.
  • a first end connector 7 was additionally arranged on the topmost solar cell 1 of the solar cell stack.
  • the first end connector 7 is spaced apart from the edge of the uppermost solar cell 1 that is on the left in FIG.
  • the first connecting element 4 is also arranged on the first end connector 7 in that an electrically conductive connection between the first end connector 7 and the first connecting element 4 is formed by means of a laser beam 6 through the action of heat.
  • first laser beams 9 separate the first connecting element 4 in order to divide the first connecting element 4 into a first group of cell connectors 11 .
  • the first laser beams 9 for separating the first connecting element 4 are shown as dashed lines.
  • pairs of adjacent solar cells 1 on the first side of the solar cell stack are electrically conductively connected to one another.
  • this is a first pair consisting of the first and second solar cell, starting from the lowest solar cell, and a second pair consisting of the third and fourth solar cell.
  • the topmost fifth solar cell is electrically conductively connected to the first end connector 7 by a cell connector 11 of the first group.
  • the first laser beams 9 for separating the first connecting element 4 are sufficient to form the first group of cell connectors. However, excess material of the first connecting element 4 remains. Since excess material of the first connecting element 4 is separated with second laser beams 10 for the separation.
  • the solar cell stack is then turned over, with a rotation of 180° taking place about an axis perpendicular to the plane of the drawing in FIG.
  • FIG. 2 The resulting configuration is shown in FIG. 2, with a second connecting element 5, which is also designed as a metal foil, being arranged on the solar cell stack on a second side in a further partial step of method step B.
  • the second side of the solar cell stack is opposite the first side, due to the rotation described above, the second side of the solar cell stack is arranged on the left in FIG. 2, whereas in FIG. 1 the first side of the solar cell stack is arranged on the left.
  • the electrically conductive connection between the second connecting element and the solar cells 1 is also formed in the second connecting element by means of laser beams 6 and the heat effect generated thereby. Also became after turning over the solar cell stack, a second end connector 8 is arranged on the solar cell 1 lying at the top after turning over the solar cell stack.
  • the second end connector 8 is also electrically conductively connected to the second connecting element 5 by means of a laser beam 6 .
  • the second connecting element 5 is also separated by means of the first laser beams 9, so that cell connectors 12 of a second group of cell connectors are formed by the second connecting element 5 being distributed.
  • the cell connectors 12 of the second group of cell connectors thus also electrically conductively connect pairs of adjacent solar cells 1 to one another on the second side (on the left in FIG. 2) of the solar cell stack. According to the illustration in FIG. 2, it is a pair consisting of the first solar cell at the bottom and the adjacent second solar cell starting therefrom, and a pair consisting of the third and method solar cell with numbering beginning at the bottom. Likewise, the uppermost solar cell 1 is electrically conductively connected to the second end connector 8 by a cell connector 12 of the second group of cell connectors.
  • the second connecting element is also carried out by means of second laser beams 10 separating steps in order to remove superfluous material of the second connecting element 5 .
  • the excess material has already been removed from the first connecting element 4, so that only the cell connectors 11 of the first group of cell connectors remain.
  • each cell connector 11 of the first group and also the cell connectors 12 of the second group make the front of a solar cell electrically conductive with the back of a solar cell lying above or below tied together.
  • the solar cells are of identical design and each have a metallic front-side electrode (not shown) on the front in the contacting area, and also a metallic contacting electrode on the back in the contacting area.
  • the cell connector 11 of the first group and Cell connectors 12 of the second group are each electrically conductively connected to the solar cells with the electrodes described above.
  • the electrodes on the front are designed as n-electrodes and the electrodes on the back are designed as p-electrodes, resulting in an electrical series connection of the solar cells.
  • FIG. 3a shows a side view of the solar cell string which is produced after the solar cell stack shown in FIG.
  • the length of the cell connectors 11 of the first group and of the cell connectors 12 of the second group is selected such that a shingle arrangement is formed.
  • each solar cell covers the neighboring solar cell on the right-hand side in the contacting area and is covered by the neighboring solar cell on the left-hand side in the contacting area, resulting in a shingle arrangement known per se.
  • the peripheral solar cells are electrically conductively connected to the outer edges of the end connectors 7 and 8 described above.
  • an extension direction 13 of the solar cell string is represented by an arrow.
  • the solar cells 1 are arranged in a row along the extension direction 13 .
  • the cell connector 11 of the first group and cell connector 12 of the second group each have a fold with parallel superposed parts of the cell connector, the opening of the fold perpendicular to the Longitudinal extension 13 of the solar cell string runs and along the longitudinal extension of the solar cell string the opening side of the fold is alternating.
  • FIG. 3a starting from the solar cell on the left, the fold of the cell connector between the first and second solar cell is open on the right, whereas the fold of the cell connector between the second and third solar cell is open on the left.
  • the side of the opening of the fold thus alternates between left and right along the longitudinal extension 13 of the solar cell string.
  • FIG. 3b shows a top view of the solar cell string. It can be seen here that the solar cells 1 have contacting structures known per se, so-called contacting fingers, on the front side, which run parallel and are represented by black lines.
  • the cell connectors between the solar cells are each covered by a solar cell due to the overlapping arrangement when viewed from above.
  • FIG. 4 shows a second exemplary embodiment of a solar cell string according to the invention. To avoid repetition, only the essential differences from the first exemplary embodiment shown in FIG. 3 will be discussed below.
  • the solar cell string shown in FIG. 4 was also produced using process steps as described for FIG. 1 and FIG.
  • the cell connectors 11 of the first group and the cell connectors 12 of the second group are longer, so that a non-overlapping arrangement of the solar cells 1 is next to one another, so that the solar cells form a plane in the direction of extension 13 of the solar cell string , is made possible.
  • the cell connectors 11 of the first group and cell connectors 12 of the second group of cell connectors thus run from the contacting area on the front side of a solar cell 11 between two adjacent solar cells through to the contacting area on the rear side of the adjacent solar cell.
  • the solar cells 1 are identical to the solar cells 1 according to the first exemplary embodiment described in FIG. 3 and also have electrodes on the front and back, which are electrically conductively connected to the cell connectors, so that this solar cell string is also electrically connected in series is.
  • each cell connector also has a fold in this arrangement and the opening direction of the folds of the cell connectors also alternates in the direction of extent 13 of the solar cell string in this arrangement.
  • FIG. 4b shows a top view of the solar cell string according to the second exemplary embodiment. Since there is no shingle arrangement here, the cell connectors are partially visible when viewed from above.
  • FIG. 5 shows an exemplary embodiment of a processing device 14 according to the invention.
  • the processing device has a plurality of step-like support surfaces on which five solar cells 1 are placed in the present case.
  • the bearing surfaces are arranged in steps and parallel to one another, so that the solar cells are arranged in a stack in parallel, one above the other, with each solar cell not covering a peripheral contacting area on the front side and a peripheral contacting area on the back of the solar cell 1 by an adjacent solar cell 1 is.
  • the processing device 14 has a plurality of bores 15 in order to generate a vacuum by means of a pump, so that the solar cells 1 are arranged stably on the processing device 14 by means of the vacuum.
  • FIG. 6 shows a plan view from above of the processing device shown in FIG.
  • a plurality of bores 15, which are represented by circles, are arranged circumferentially around the support surface for the solar cells 1 in an edge of the processing device 14.
  • the hole in the upper left corner is marked with the reference number 15 as an example.
  • the electrically conductive connection is formed and the connecting element is severed, ie in the present case the metal foil, as previously described.

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  • 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)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une chaîne de cellules solaires, des cellules solaires étant rendues disponibles dans un empilement de cellules solaires et étant reliées électriquement au moyen de connecteurs de cellules.
EP22716195.7A 2021-03-18 2022-03-17 Procédé de fabrication d'une chaîne de cellules solaires, chaîne de cellules solaires, dispositif de traitement pour une chaîne de cellules solaires, et utilisation d'un tel dispositif de traitement pour la fabrication d'une chaîne de cellules solaires Pending EP4309210A1 (fr)

Applications Claiming Priority (2)

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PCT/EP2022/056943 WO2022194993A1 (fr) 2021-03-18 2022-03-17 Procédé de fabrication d'une chaîne de cellules solaires, chaîne de cellules solaires, dispositif de traitement pour une chaîne de cellules solaires, et utilisation d'un tel dispositif de traitement pour la fabrication d'une chaîne de cellules solaires

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JP2567294Y2 (ja) * 1992-02-15 1998-04-02 シャープ株式会社 太陽電池モジュール
WO2005093855A1 (fr) 2004-03-29 2005-10-06 Kyocera Corporation Module de cellule solaire et générateur photovoltaïque d’énergie l’utilisant
ES2546311T3 (es) 2010-09-07 2015-09-22 Dow Global Technologies Llc Ensamblaje mejorado de células fotovoltaicas
US20140124014A1 (en) * 2012-11-08 2014-05-08 Cogenra Solar, Inc. High efficiency configuration for solar cell string
CN105590980B (zh) * 2016-02-18 2017-03-22 协鑫集成科技股份有限公司 太阳能电池组件及其制备方法
EP3731282B1 (fr) 2018-01-25 2023-05-17 Kaneka Corporation Module de batterie solaire
DE102018105472A1 (de) 2018-03-09 2019-09-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung einer photovoltaischen Solarzelle, photovoltaische Solarzelle und Photovoltaikmodul

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US20240170594A1 (en) 2024-05-23
CA3212617A1 (fr) 2022-09-22
DE102021106598B4 (de) 2023-12-28
DE102021106598A1 (de) 2022-09-22
WO2022194994A1 (fr) 2022-09-22
CN117178376A (zh) 2023-12-05
CN117296160A (zh) 2023-12-26
US20240178332A1 (en) 2024-05-30
EP4309211A1 (fr) 2024-01-24

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