WO2020231028A1 - MODULE SOLAIRE AYANT UNE STRUCTURE DE DIVISION/JONCTION DE CELLULES, UTILISANT UN MOTIF D'ÉLECTRODE DE RÉDUCTION D'Ag - Google Patents

MODULE SOLAIRE AYANT UNE STRUCTURE DE DIVISION/JONCTION DE CELLULES, UTILISANT UN MOTIF D'ÉLECTRODE DE RÉDUCTION D'Ag Download PDF

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Publication number
WO2020231028A1
WO2020231028A1 PCT/KR2020/005253 KR2020005253W WO2020231028A1 WO 2020231028 A1 WO2020231028 A1 WO 2020231028A1 KR 2020005253 W KR2020005253 W KR 2020005253W WO 2020231028 A1 WO2020231028 A1 WO 2020231028A1
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Prior art keywords
solar cell
solar module
tiled
finger
electrode
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PCT/KR2020/005253
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English (en)
Korean (ko)
Inventor
이재형
오원제
박지수
Original Assignee
성균관대학교산학협력단
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Priority claimed from KR1020190163345A external-priority patent/KR102371947B1/ko
Application filed by 성균관대학교산학협력단 filed Critical 성균관대학교산학협력단
Publication of WO2020231028A1 publication Critical patent/WO2020231028A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/36—Electrical components characterised by special electrical interconnection means between two or more PV modules, e.g. electrical module-to-module connection
    • 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 application relates to a tiled laminated solar module and a method of manufacturing the same.
  • a solar cell refers to generating electric energy when light is irradiated on a substrate. Unlike thermal power generation or nuclear power generation, solar cells do not emit harmful substances such as harmful gases and radioactive waste during power generation.
  • the structure of a solar cell includes a substrate made of semiconductors of different conductive types, such as p-type and n-type, and an emitter, and an electrode connected to the substrate and the emitter, respectively. Because the and emitters have different conductivity types, a pn junction is formed.
  • a plurality of electron-hole pairs are generated in a semiconductor, and the generated electron-hole pairs are separated into electrons and holes, which are charges by a photovoltaic effect, so that the electrons and holes are n-type. It moves in the semiconductor and p-type semiconductor directions of, for example, the emitter and substrate direction, and is collected by the substrate and the electrode electrically connected to the emitter, and power can be obtained by connecting these electrodes with wires.
  • the conventional module manufacturing method is a method of manufacturing by connecting a cell and a cell with a plurality of metal ribbons, and a space is required to prevent electrical short circuits of the cells, and since output loss due to the bus bar occurs, solar modules compared to cells Methods for reducing efficiency loss (cell-to-module loss or CTM loss) are being studied.
  • Photovoltaic modules are manufactured in various ways, such as a method of first dividing a cell, then soldering the front bus bar to the front bus bar of the divided cell and connecting it to other divided cells.
  • stress and microcracks may occur due to local heat transfer and pressure generated during the soldering process, and the shingled solar module to overcome this problem connects the solar cell without a bus bar. It presents a way to do it.
  • Korean Patent Publication No. 10-1874016 which is the background technology of the present application, relates to a high-efficiency PERC solar cell having a shingled array structure and a method of manufacturing the same.
  • the high-efficiency PERC solar cell having the shingled array structure of the above patent only includes an electrode that serves as a bus bar, and does not include a bus bar and an electrode pad on the front and rear surfaces, or an electrode that performs the same role. They are not aware of the stacked solar modules.
  • the present application is to solve the problems of the prior art described above, and an object of the present invention is to provide a tiled stacked solar module.
  • an object of the present application is to provide a method of manufacturing the tiled stacked solar module.
  • the first aspect of the present application is a tiled laminated solar module including two or more solar cell cells, wherein the solar cell is a finger electrode arranged parallel to the upper surface, A finger auxiliary line connecting the finger electrode vertically and a rear electrode disposed on a lower surface thereof, and the solar cells are overlapped by a conductive adhesive layer interposed between the upper and lower rear electrodes of the finger auxiliary line. It provides a photovoltaic module with a phosphorus, tiled laminated structure.
  • the solar cell includes a light absorption layer formed on the rear electrode, an emitter formed on the light absorption layer, a passivation layer formed on the emitter, and a finger electrode formed on the emitter. It may be included, but is not limited thereto.
  • the solar cell may not include an electrode pad on a rear surface and a bus electrode on an upper surface, but is not limited thereto.
  • the light absorbing layer is single crystal polysilicon, polycrystalline polysilicon, group III-V compound, group II-VI compound, group I-III-VI compound, perovskite, quantum dots, and It may include a material selected from the group consisting of combinations, but is not limited thereto.
  • the rear electrode, the finger electrode, and the finger auxiliary line are each independently Ag, Al, Au, Pt, Ti, Ni, Zr, Ta, Zn, Nb, Cr, Co, Mn , Fe, Al, Mg, Si, W, Cu, lanthanum-based metals, nitrides thereof, oxides thereof, and a material selected from the group consisting of combinations thereof, but is not limited thereto.
  • the conductive adhesive layer is Ag, Ni, C, Ti, acrylic rubber or polystyrene coated with a metal selected from Au, Ag, Ni, C, Ti, Au, and combinations thereof It may include, but is not limited thereto.
  • the solar module may further include a metal wiring for connecting the solar cell cells, but is not limited thereto.
  • the passivation layer is SiN x :H, Si 3 N 4 , SiO x , SiON, Al 2 O 3 , SiC, MgF 2 , ZnS, TiO 2 , CeO 2 , and combinations thereof It may include a material selected from the group consisting of, but is not limited thereto.
  • a second aspect of the present application is a method of manufacturing a tiled stacked solar module, in which a solar cell including a finger electrode arranged parallel to an upper surface and a rear electrode arranged at a lower surface is arranged in a direction perpendicular to the finger electrode. Dividing into, forming a conductive adhesive on a finger auxiliary line connecting the cut surface of the finger electrode of the divided solar cell, and part of the rear electrode of the divided solar cell It provides a method of manufacturing a tiled laminated solar module comprising the step of attaching an adhesive to bond the solar cell of the one side and the solar cell of the other side.
  • the step of forming a finger auxiliary line connecting a cut surface of the finger electrode of the divided solar cell of the solar cell may be additionally included, but is not limited thereto.
  • the step of dividing the solar cell may be performed by a laser method, a mechanical scribing method, sawing, and a combination thereof, but is not limited thereto.
  • the forming of the conductive adhesive may include screen printing, bar coating, spin coating, nozzle printing, spray coating, slot die coating, gravure printing, inkjet printing, electrohydrodynamic jet printing. ), electrospray, and combinations thereof, but are not limited thereto.
  • forming a metal wire on the solar module and passivating the solar module may be additionally included, but is limited thereto. It is not.
  • the conventional module manufacturing method is a method of manufacturing by connecting a cell and a cell with a plurality of metal wires, and a space is required to prevent electrical short circuits of the cells, and since output loss by the bus bar occurs, solar modules compared to cells Methods to reduce efficiency loss (cell-to-module loss or CTM loss) are being studied.
  • the photoelectric efficiency of the tiled stacked solar module according to the present application is maintained without including the front busbar and the rear electrode pad, the conventional cell division/junction solar module Compared to the manufacturing method, the use of Ag is reduced in manufacturing the front busbar and the rear electrode pad, and as a result, manufacturing cost can be reduced.
  • the conventional solar cell module connects the bus bar on one side of the solar cell to the other side of the other solar cell by soldering, the efficiency of the solar cell is reduced, such as current loss due to soldering and stress due to heat. Although it may be degraded, since the tiled laminated solar module according to the present application uses a conductive adhesive, the efficiency of the solar cell may be increased.
  • tiled stacked solar module according to the present application has no busbars other than finger electrodes on the light-receiving surface, power generation efficiency may also be increased by reducing light loss due to light reflection.
  • the effect obtainable in the present application is not limited to the effects as described above, and other effects may exist.
  • FIG. 1 is a schematic diagram of a solar cell according to an embodiment of the present application.
  • FIG. 2 is a schematic front view of a tiled stacked solar module according to an embodiment of the present application.
  • FIG 3 is a schematic rear view of a tiled stacked solar module according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a tiled stacked solar module according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a conventional solar cell.
  • FIG. 6 is a schematic front view of a conventional solar module.
  • FIG. 7 is a schematic rear view of a conventional solar module.
  • Figure 8 (a) is a schematic diagram of a conventional solar module, (b) and (c) is a schematic diagram showing a connection method of the solar module.
  • FIG. 9 is a flow chart of a method of manufacturing a tiled stacked solar module according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a method of forming a conductive adhesive layer according to an embodiment of the present application.
  • FIG. 11 is a diagram showing a method of manufacturing a tiled stacked solar module according to an embodiment of the present application.
  • FIG. 14 is a current-voltage graph of a solar module according to an embodiment and a comparative example of the present application.
  • the term “combination of these” included in the expression of the Makushi format refers to one or more mixtures or combinations selected from the group consisting of the components described in the expression of the Makushi format, and the component It means to include one or more selected from the group consisting of.
  • the first aspect of the present application is, in the tiled stacked solar module 10 including two or more solar cell 100, the solar cell 100 A finger electrode 200 arranged parallel to the upper surface, a finger auxiliary line 300 vertically connecting the finger electrode 200, and a rear electrode 1000 disposed on a lower surface thereof, and the solar cell 100 They provide a tiled laminated photovoltaic module 10 that is overlapped by a conductive adhesive layer 400 interposed between the upper finger auxiliary line 300 and the lower rear electrode 1000 below.
  • FIG. 1 is a schematic diagram of a solar cell 100 according to an embodiment of the present application.
  • the solar cell 100 includes a light absorption layer 3000 formed on the rear electrode 1000, an emitter 4000 formed on the light absorption layer 3000, and the emitter.
  • the passivation layer 5000 formed on the (4000) and the finger electrode 200 formed on the emitter 4000 may be included, but are not limited thereto.
  • FIG. 1 a description of the structure of the solar cell 100 is referred to FIG. 1.
  • the solar cell 100 may further include a passivation layer 2000 and a local electric layer 2100 between the rear electrode 1000 and the light absorbing layer 3000, It is not limited thereto.
  • the light absorption layer 3000 refers to a region that receives sunlight and produces electrons and holes.
  • the light absorption layer 3000 is a single crystal polysilicon, polycrystalline polysilicon, III-V group compound, II-VI group compound, I-III-VI group compound, perovskite, quantum dot, And it may include a material selected from the group consisting of combinations thereof, but is not limited thereto.
  • the passivation layers 2000 and 5000 refer to anti-reflection layers, and serve to suppress light irradiated to the solar cell from being reflected and emitted to the outside of the solar cell.
  • the passivation layer 5000 located at the upper end of the emitter 4000 and the passivation layer 2000 located at the upper end of the rear electrode 1000 may perform the same role.
  • the passivation layer (2000, 5000) is SiN x :H, Si 3 N 4 , SiO x , SiON, Al 2 O 3 , SiC, MgF 2 , ZnS, TiO 2 , CeO 2 , And it may include a material selected from the group consisting of combinations thereof, but is not limited thereto.
  • the emitter 4000 is for forming a p-n junction for separating electron and hole pairs, and may have a doping type different from that of the light absorption layer 3000.
  • the emitter 4000 may be n-type silicon.
  • the local electric field layer 2100 is formed on the top of the rear electrode 1000 and refers to an electric field layer formed by a voltage applied to the rear electrode 1000.
  • the local electric field 2100 is for improving the efficiency of the solar cell 100 by suppressing the recombination of electrons in the solar cell 100.
  • the solar cell 100 included on the tiled stacked solar module 10 may have the same structure as a conventional solar cell.
  • the solar cell 100 and the conventional solar cell may have a structure as shown in FIG. 1.
  • the present invention may have similarity to a conventional solar module of a cell division/junction structure in that the divided solar cells 100 are connected using the conductive adhesive, but the tiled laminated solar module 10 ) Does not include the bus electrode and back electrode pad. Accordingly, the present application can provide a tiled stacked solar module 10 manufactured at a lower cost than a conventional process.
  • the solar cell 100 may not include an electrode pad on a rear surface and a bus electrode on an upper surface, but is not limited thereto.
  • the bus electrode included in the conventional photovoltaic module refers to an electrode for connecting the finger electrode 200 and the finger electrode 200. As will be described later, the electric energy generated by the conventional solar cell by the bus electrode can be transferred to another solar cell via the finger electrodes 200, but the area at the bottom of the bus electrode can produce electric energy. There is no shortcoming.
  • the rear electrode pad of a conventional solar module may mean a region in which a metal ribbon for connecting the bus electrode is formed or a region in which a conductive adhesive is formed to contact the bus electrode.
  • the metal ribbon or the conductive adhesive is formed on the top of the bus electrode on the upper surface of the conventional solar cell, and attached to the electrode pad on the lower end of the other solar cell, thereby connecting a plurality of conventional solar cell.
  • the tiled stacked solar module 10 according to the present application can transmit current only with the conductive adhesive layer 400 without the electrode pad on the rear surface and the bus electrode.
  • FIG. 2 is a schematic front view of a tiled laminated solar module 10 according to an embodiment of the present application
  • Figure 3 is a schematic rear view of a tiled laminated solar module 10 according to an embodiment of the present application
  • Figure 4 Is a schematic diagram of a tiled stacked solar module 10 according to an embodiment of the present application.
  • the tiled stacked solar module 10 may include a finger electrode 200 and a finger auxiliary line 300 vertically connecting the finger electrode 200, but is limited thereto. It does not become.
  • the finger electrode 200 is also referred to as a grid line, and means formed on the passivation layers 2000 and 5000 to collect the current generated by the light absorbing layer 3000 and the emitter 4000 .
  • the finger electrode 200 may be disposed on one side of the solar cell 100 with a predetermined interval in the length direction or the width direction of the solar cell 100. , But is not limited thereto.
  • the finger auxiliary wire 300 means a wire for connecting the finger electrode 200 and the finger electrode 200.
  • the finger auxiliary line 300 connects the plurality of finger electrodes 200 so that all of the finger electrodes 200 come into contact with the conductive adhesive layer 400 to allow current to flow. can do.
  • the tiled stacked solar module 10 can generate power, and the finger auxiliary line 300 is the power generation efficiency of the tiled stacked solar module 10 It is to further improve.
  • the rear electrode 1000, the finger electrode 200, and the finger auxiliary line 300 are each independently Ag, Al, Au, Pt, Ti, Ni, Zr, Ta, Zn, Nb, Cr, Co, Mn, Fe, Al, Mg, Si, W, Cu, lanthanum metals, nitrides thereof, oxides thereof, and may include a material selected from the group consisting of combinations thereof. , But is not limited thereto.
  • the tiled stacked solar module 10 is perpendicular to the finger electrode 200 formed on one side of the solar cell 100. After dividing in one direction, a structure in which the divided solar cells 100 are bonded using the conductive adhesive may be included, but is not limited thereto.
  • the tiled stacked solar module 10 does not include a bus electrode, a rear electrode pad, and a metal ribbon for electrically connecting the rear electrode pad and the bus electrode. I can confirm.
  • the tiled laminated solar module 10 has the advantage of low manufacturing cost because it can produce electric energy only through the conductive adhesive layer 400, the finger electrode 200, and the finger auxiliary line 300 do.
  • the tiled laminated solar module 10 is the electrode structure of FIGS. 2 and 3, specifically As a result, the finger electrode 200 and the rear electrode 1000 may be included at the same time, and light may be generated from the front and the rear, so that the efficiency is high.
  • the solar cell may have an Ag reduction electrode structure, and accordingly, the finger electrode 200 and the auxiliary line 300 of the finger electrode 200 are included on one side of the solar cell, A rear electrode 1000 may be included on the other side of the solar cell, but is not limited thereto.
  • the conductive adhesive layer 400 is for connecting at least two or more of the solar cell 100 and refers to an adhesive layer capable of transmitting electricity unlike a general adhesive layer.
  • the term "electrical conductive adhesive layer 400" may be used interchangeably with an electrical conductive adhesive.
  • the conductive adhesive layer 400 is for electronic packaging, and unlike soldering, a low-temperature process is possible, and since it does not use toxic substances, it is environmentally friendly, and the process is simple, and it can be used in a wide range. have.
  • the conductive adhesive layer 400 used in the tiled laminated solar module 10 of the present application may include an anisotropic conductive adhesive or an isotropic conductive adhesive, but is not limited thereto.
  • the conductive adhesive according to the present application may include an isotropic conductive adhesive through which current can flow in all directions and an anisotropic conductive adhesive through which current can flow in only one direction.
  • An anisotropic conductive adhesive may be used to control the current generated in the solar cell 100 to flow in only one direction, such as an up-down direction, a left-right direction, and a front-rear direction.
  • the conductive adhesive layer 400 is Ag, Ni, C, Ti, acrylic rubber coated with a metal selected from Au, Ag, Ni, C, Ti, Au, and combinations thereof. ) Or polystyrene, but is not limited thereto.
  • the conductive adhesive when bonding the plurality of solar cell 100 to manufacture the tiled laminated solar module 10, the conductive adhesive is excessively applied to one side of the solar cell 100 And/or when printed to the other side, electrical short may occur.
  • the conductive adhesive layer 400 may be applied at regular intervals from a corner portion of the other side of the solar cell 100.
  • the finger auxiliary line 300 when the conductive adhesive is applied at a certain interval at the corner of the other side of the solar cell 100, a part of the finger electrode 200 in contact with the corner does not contact the conductive adhesive. There may be a problem that the current cannot be collected. As described above, the problem can be solved by the finger auxiliary line 300.
  • the path through which current flows in the tiled stacked solar module 10 is the finger electrode 200, the finger auxiliary line 300, and the conductive adhesive layer on one side of the solar cell. 400, and the rear electrode 1000 of the solar cell may be included, but the present invention is not limited thereto.
  • the tiled stacked solar module 10 may further include a metal wiring (not shown) for connecting the solar cell 100, but is not limited thereto.
  • the metal wiring (not shown) according to the present application is for connecting the solar cell 100 connected by the conductive adhesive layer 400.
  • FIG. 5 is a schematic diagram of a conventional solar cell
  • FIGS. 6 and 7 are front and rear schematic diagrams of a conventional solar module
  • FIG. 8 (a) is a schematic diagram of a conventional solar module
  • (b) and (c) is a schematic diagram showing the connection method of the solar module.
  • the rear electrode pad and the bus electrode included in a conventional solar module, and the conductive adhesive layer 400 of the tiled stacked solar module 10 are each of the solar cell It serves to transfer the electric energy generated in (100) to another solar cell (100).
  • the rear electrode pad and the bus electrode contain an expensive material, for example, silver (Ag), mass production is difficult, and the light absorbing layer 3000 located below the bus electrode contains electrons and There is a disadvantage that holes do not occur.
  • the tiled laminated solar module 10 of the present application does not include a metal ribbon, an electrode pad, and a bus electrode, as described above, less expensive materials, such as silver (Ag), compared to a conventional solar module. It can be manufactured using and has a wide range of advantages.
  • the second aspect of the present application is a solar cell including a finger electrode 200 arranged parallel to an upper surface and a rear electrode 1000 arranged at a lower surface in the method of manufacturing the tiled stacked solar module 10 Dividing (100) in a direction perpendicular to the finger electrode 200, on the finger auxiliary line 300 connecting the cut surface of the finger electrode 200 of the divided solar cell 100 Forming a conductive adhesive, and attaching the conductive adhesive to a part of the rear electrode 1000 of the divided solar cell 100 to form the solar cell 100 on the one side and the solar cell cell on the other side. It provides a method of manufacturing a tiled laminated solar module 10 comprising the step of bonding (100).
  • FIG. 9 is a flowchart of a method of manufacturing a tiled stacked solar module 10 according to an exemplary embodiment of the present disclosure.
  • the tiled laminated solar module 10 of the present application does not include a bus electrode and a rear electrode pad, so the method of manufacturing the tiled laminated solar module 10
  • the manufacturing step may be simple because it does not include the process of forming the bus electrode and the process of forming the rear electrode pad.
  • a solar cell 100 including a finger electrode 200 arranged parallel to the upper surface and a rear electrode 1000 arranged at the lower surface is applied to the finger. Divided in a direction perpendicular to the electrode 200 (S100).
  • the step of dividing the solar cell 100 in a direction perpendicular to the finger electrode 200 includes the finger electrode 200 of the divided solar cell 100
  • the step of forming the finger auxiliary line 300 connecting the cut surfaces may be additionally included, but is not limited thereto.
  • the conventional solar module includes a bus electrode, when the finger electrode 200 is disposed in a horizontal direction with respect to the finger electrode 200, for example, the finger electrode 200 is vertically arranged, the conventional solar module is It includes a solar cell 100 divided in the direction.
  • the solar cell 100 of the present application does not include a bus electrode
  • the finger electrode 200 when the finger electrode 200 is disposed in a vertical direction, for example, the finger electrode 200 is disposed in the vertical direction
  • the present application According to the solar module includes a solar cell 100 divided in the left and right direction.
  • the step of dividing the solar cell 100 may be performed by a laser method, a mechanical scribing method, sawing, and a combination thereof selected from the group consisting of, but is limited thereto. It is not.
  • a conductive adhesive is formed on the finger auxiliary line 300 connecting the cut surface of the finger electrode 200 of the divided solar cell 100 (S200).
  • the area where the conductive adhesive is formed may mean the conductive adhesive layer 400.
  • the conductive adhesive layer 400 may be formed in a state in which some regions of the solar cell 100 or the passivation layers 2000 and 5000 of the divided solar cell 100 are open. However, it is not limited thereto.
  • the opening of the passivation layers 2000 and 5000 includes a process comprising selected from the group consisting of lithography, chemical etching, dry etching, optical etching, and combinations thereof. It may be performed by, but is not limited thereto.
  • FIG. 10 is a schematic diagram of a method of forming a conductive adhesive layer 400 according to an embodiment of the present application.
  • the conductive adhesive layer 400 and ECA may be formed on the emitter 4000 exposed by partially opening the passivation layers 2000 and 5000.
  • the solar cell 100 on which the conductive adhesive layer 400 is formed may be coupled to the rear electrode 1000 of another solar cell 100, and a tiled stacked solar module by the coupling (10) can be formed.
  • the forming of the conductive adhesive may include screen printing, bar coating, spin coating, nozzle printing, spray coating, slot die coating, gravure printing, inkjet printing, electrohydrodynamic jet printing. ), electrospray, and combinations thereof, but are not limited thereto.
  • the solar cell 100 may be divided and bonded, but is not limited thereto.
  • the The divided solar cell 100 may be bonded by curing the conductive adhesive.
  • forming a metal wire on the solar module 10 and passivating the solar module 10 It may further include, but is not limited thereto.
  • Passivating the solar module 10 includes blocking loss of electrons and holes generated in the tiled stacked solar module 10, and reflecting the light reflected from the light absorbing layer 3000 to reflect the solar light. It may be performed to increase the power generation efficiency of the module 10.
  • FIG. 11 is a diagram showing a method of manufacturing a tiled stacked solar module according to an embodiment of the present application.
  • a solar cell having a silver (Ag) reduction electrode structure was manufactured. Subsequently, the solar cell was divided into a plurality of cells with respect to the vertical direction of the finger electrode formed on the solar cell. Subsequently, a conductive adhesive was applied on the divided solar cells, the divided solar cells were bonded, and then connected with a metal wire.
  • Ag silver
  • a conductive adhesive (ECA) was applied to the front busbar of the cell, and the ECA was bonded to the rear Ag pad of another cell to produce a single string. At this time, a sufficient amount of ECA was used so that the busbar and the Ag pad were not exposed to the outside.
  • the strings were connected in a series-parallel structure, and the strings were electrically connected by soldering them with a metal ribbon to manufacture a tiled stacked solar cell (busing process).
  • the solar cell of the tiled laminated structure was arranged according to the designed module structure, and a cover glass, an EVA film, and a back sheet were stacked on the solar cell to manufacture a solar cell module sealed from an external environment.
  • a junction box for transmitting the electricity produced by the module to the outside and a frame for securing rigidity and fastening property were combined.
  • FIG. 12A is a photograph of a tiled stacked solar module according to the embodiment, and (b) is a photograph of a conventional shingled solar module according to the comparative example.
  • the shingled solar module has a bus bar. Accordingly, the tiled stacked solar module can reduce manufacturing cost by using less silver (Ag) than the conventional shingled solar module.
  • FIG. 13A is an image of a photovoltaic module according to the embodiment
  • (b) is an image of a photovoltaic module according to a comparative example
  • FIG. 14 is a current of the photovoltaic module according to the embodiment and the comparative example.
  • -It is a voltage graph.
  • a solar module without a bus bar may have similar efficiency while using less material than a solar module with a bus bar (Comparative Example).

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Abstract

La présente invention concerne un module solaire ayant une structure empilée en tuiles, comprenant deux cellules solaires ou plus, les cellules solaires comprenant chacune : une électrode de doigt disposée de façon à être parallèle à la surface supérieure de celle-ci; une ligne d'assistance de doigt pour connecter verticalement l'électrode de doigt; et une électrode arrière disposée sur la surface inférieure de celle-ci, et les cellules solaires sont connectées de manière superposée par une couche adhésive conductrice interposée entre la partie supérieure de la ligne d'assistance aux doigts et l'électrode inférieure disposée sur la surface inférieure de celle-ci.
PCT/KR2020/005253 2019-05-13 2020-04-21 MODULE SOLAIRE AYANT UNE STRUCTURE DE DIVISION/JONCTION DE CELLULES, UTILISANT UN MOTIF D'ÉLECTRODE DE RÉDUCTION D'Ag WO2020231028A1 (fr)

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KR20190055853 2019-05-13
KR10-2019-0055853 2019-05-13
KR10-2019-0163345 2019-12-10
KR1020190163345A KR102371947B1 (ko) 2019-05-13 2019-12-10 Ag 저감 전극 패턴을 이용한 셀 분할/접합 구조 태양광 모듈

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Citations (4)

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Publication number Priority date Publication date Assignee Title
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