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WO2016065933A1 - Cellule solaire, module de cellules solaires et son procédé de fabrication - Google Patents

Cellule solaire, module de cellules solaires et son procédé de fabrication Download PDF

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Publication number
WO2016065933A1
WO2016065933A1 PCT/CN2015/084052 CN2015084052W WO2016065933A1 WO 2016065933 A1 WO2016065933 A1 WO 2016065933A1 CN 2015084052 W CN2015084052 W CN 2015084052W WO 2016065933 A1 WO2016065933 A1 WO 2016065933A1
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WIPO (PCT)
Prior art keywords
cell
metal wire
cells
solar cell
conductive
Prior art date
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Ceased
Application number
PCT/CN2015/084052
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English (en)
Inventor
Zhiqiang Zhao
Shuping KANG
Zhanfeng Jiang
Long He
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BYD Co Ltd
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BYD Co Ltd
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Publication date
Priority claimed from CN201510218489.4A external-priority patent/CN106206812B/zh
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Publication of WO2016065933A1 publication Critical patent/WO2016065933A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
    • H10F19/902—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells
    • H10F19/906—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells characterised by the materials of the structures
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
    • H10F19/902—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells
    • H10F19/904—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells characterised by the shapes of the 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 disclosure relates to a field of solar cells, and more particularly, to a solar cell, a solar cell module and a manufacturing method thereof.
  • a solar cell module is one of the most important components of a solar power generation device. Sunlight irradiates onto a cell from its front surface and is converted to electricity within the cell, Primary grid lines and secondary grid lines are disposed on the front surface, and then a welding strip covers and is welded on the primary grid lines outputs the current.
  • the welding strip, the primary grid lines and the secondary grid lines cover part of the front surface of the cell, which blocks out part of the sunlight, and the part of sunlight irradiating onto the primary grid lines and the secondary grid lines cannot be converted into electric energy.
  • the welding strip, the primary grid lines and the secondary grid lines need to be designed as fine as possible in order for the solar cell module to receive more sunlight.
  • the welding strip, the primary grid lines and the secondary grid lines serve to conduct current, and in terms of resistivity, the finer the primary grid lines and the secondary grid lines are, the smaller the conductive cross section area thereof is, which causes greater loss of electricity due to increased resistivity. Therefore, the welding strip, the primary grid lines and the secondary grid lines shall be designed to get a balance between light blocking and electric conduction, and to take the cost into consideration.
  • the primary grid lines and the secondary grid lines of the solar cells are made of expensive silver paste, which results in complicated manufacturing process of the primary grid lines and the secondary grid lines, and high cost.
  • the primary grid lines on the front surface of a cell are welded with back electrodes of another adjacent cell by a solder strip. Consequently, the welding of the primary grid lines is complicated, and the manufacturing cost of the cells is high.
  • two primary grid lines are usually disposed on the front surface of the cell, and formed by applying silver paste to the front surface of the cell.
  • the primary grid lines have a great width (for example, up to over 2mm) , which consumes a large amount of silver, and makes the cost high.
  • the number of the primary grid lines is limited by the solder strip.
  • the prior art replaces the silver primary grid lines printed on the cell with metal wires, for example, copper wires.
  • the copper wires are welded with the secondary grid lines to output the current. Since the silver primary grid lines are no longer used, the cost can be reduced considerably.
  • the copper wire has a smaller diameter to reduce the shading area, so the number of the copper wires can be raised up to 10.
  • This kind of cell may be called a cell without primary grid lines, in which the metal wire replaces the silver primary grid lines and solder strips in the traditional solar cells.
  • the electrical connection of the metal wire and the cells is formed by laminating a transparent film pasted with metal wires and the cells, i.e. multiple parallel metal wires being fixed on the transparent film by adhesion, then being stuck on the cell, and finally being laminated to contact with the secondary grid lines on the cell.
  • the metal wires are in contact with the secondary grid lines by the laminating process, so as to output the current.
  • the transparent film weakens the absorption rate of light, and a plurality of parallel metal wires may be in bad connection with the cells, which may affect the electrical performance.
  • the number of the metal wires needs to be increased.
  • the number of the metal wires is increased, the absorption rate of light from the front surface is affected, and the performance of the product is degraded. Consequently, the product in this technical solution is not promoted and commercialized. Moreover, as said above, the number of the parallel metal wires is limited by the distance between adjacent metal wires.
  • an American patent discloses a technical solution that metal wires are fixed by a transparent film.
  • multiple primary grid lines are arranged in parallel, and laminated onto the cells via the transparent film.
  • the laminating temperature is much lower than the melting temperature of the transparent film, so the transparent film cannot really be laminated with the cells due to the intervals among the primary grid lines, and there will be gap between the transparent film and the cells, so as to cause poor airtightness of the cell module.
  • the photoelectric conversion efficiency of the cells will be greatly influenced due to oxidation of air and moisture.
  • the structure of the solar cell is not complicated, but each component is crucial.
  • the production of the primary grid lines takes various aspects into consideration, such as shading area, electric conductivity, equipment, process, cost, etc., and hence becomes a difficult and hot issue in the solar cell technology.
  • a solar cell with two primary grid lines is replaced with a solar cell with three primary grid lines in 2007 through huge efforts of those skilled in the art.
  • a few factories came up with a solar cell with four primary grid lines around 2014.
  • the concept of multiple primary grid lines is put forward in the recent years, but still there is no fairly mature product.
  • the present disclosure seeks to solve at least one of the problems existing in the related art to at least some extent.
  • the present disclosure provides a solar cell without primary grid lines, which needs neither primary grid line nor sold strip disposed on the cells, and thus lowers the cost.
  • the solar cell without primary grid lines can be commercialized for mass production, easy to manufacture with simple equipment, especially in low cost, and moreover have high photoelectric conversion efficiency.
  • a solar cell module includes an upper cover plate, a front adhesive layer, a cell array, a back adhesive layer and a back plate superposed in sequence, the cell array comprising multiple cells, adjacent cells connected by a plurality of conductive wires which are constituted by a metal wire extending reciprocally between surfaces of the adjacent cells, the metal wire including a metal wire body and a conductive adhesive coating the metal wire body, the conductive wires being in contact with the cells, the front adhesive layer in direct contact with the conductive wires and filling between adjacent conductive wires.
  • the conductive wires constituted by the metal wire which extends reciprocally replace traditional primary grid lines and welding strips, so as to reduce the cost.
  • the metal wire extends reciprocally to decrease the number of free ends of the metal wire and to save the space for arranging the metal wire, i.e. without being limited by the space.
  • the number of the conductive wires constituted by the metal wire which extends reciprocally may be increased considerably, which is easy to manufacture, and thus is suitable for mass production.
  • the metal wire body is coated with a conductive adhesive to form the metal wire, so as to form the conductive wires which are electrically connected with the cell by the conductive adhesive.
  • the conductive adhesive has been cured and bound with the cell before the front adhesive layer melts, so as to solve the problem that the metal wire drifts due to the melting of the front adhesive layer in the laminating process, and to obtain relatively high photoelectric conversion efficiency of the solar cell module.
  • the front adhesive layer contacts with the conductive wires directly and fills between the adjacent conductive wires, which can effectively isolate the conductive wires from air and moisture to prevent the conductive wires from oxidation to guarantee the photoelectric conversion efficiency.
  • a method for manufacturing a solar cell module includes: applying a conductive adhesive to a metal wire body to form a metal wire; forming a plurality of conductive wires by a metal wire which extends reciprocally between surfaces of the cells and contacts with the surfaces of the cells, in which the conductive wires are connected with secondary grid lines of the cell via the conductive adhesive, such that adjacent cells are connected by the plurality of conductive wires to form a cell array; superposing an upper cover plate, a front adhesive layer, the cell array, a back adhesive layer and a back plate in sequence, in which a front surface of the cell faces the front adhesive layer, such that the front adhesive layer contacts with the conductive wires directly and fills between adjacent conductive wires; and a back surface of the cell faces the back adhesive layer, and laminating them to obtain the solar cell module.
  • a solar cell unit consists of a cell and a conductive wire, in which the cell includes a cell substrate and a secondary grid line disposed on a front surface of a cell substrate; the conductive wire is constituted by a metal wire; the metal wire consists of a metal wire body and a conductive adhesive coating the metal wire body; and the conductive wire and the secondary grid line are connected via the conductive adhesive.
  • Fig. 1 is a plan view of a solar cell array according to an embodiment of the present disclosure
  • Fig. 2 is a transverse sectional view of a solar cell array according to an embodiment of the present disclosure
  • Fig. 3 is a longitudinal sectional view of a solar cell array according to embodiments of the present disclosure.
  • Fig. 4 is a schematic diagram of a metal wire for forming a conductive wire according to embodiments of the present disclosure
  • Fig. 5 is a plan view of a solar cell array according to another embodiment of the present disclosure.
  • Fig. 6 is a plan view of a solar cell array according to another embodiment of the present disclosure.
  • Fig. 7 is a schematic diagram of a metal wire extending reciprocally according to embodiments of the present disclosure.
  • Fig. 8 is a schematic diagram of two cells of a solar cell array according to embodiments of the present disclosure.
  • Fig. 9 is a sectional view of a solar cell array formed by connecting, by a metal wire, the two cells according to Fig. 8;
  • Fig. 10 is a schematic diagram of a solar cell module according to embodiments of the present disclosure.
  • Fig. 11 is a sectional view of part of the solar cell module according to Fig. 10;
  • Fig. 12 is a schematic diagram of a solar cell array according to another embodiment of the present disclosure.
  • a cell 31 includes a cell substrate 311, secondary grid lines 312 disposed on a front surface (the surface on which light is incident) of the cell substrate 311, a back electric field 313 disposed on a back surface of the cell substrate 311, and back electrodes 314 disposed on the back electric field 313.
  • the secondary grid lines 312 can be called the secondary grid lines 312 of the cell 31, the back electric field 313 called the back electric field 313 of the cell 31, and the back electrodes 314 called the back electrodes 314 of the cell 31.
  • a cell substrate 311 can be an intermediate product obtained by subjecting, for example, a silicon chip to processes of felting, diffusing, edge etching and silicon nitride layer depositing.
  • the cell substrate 311 in the present disclosure is not limited to be formed by the silicon chip, but includes any other suitable solar cell substrate 311.
  • the cell 31 comprises a silicon chip, some processing layers on a surface of the silicon chip, secondary grid lines on a shiny surface (namely a front surface) , and a back electric field 313 and back electrodes 314 on a shady surface (namely a back surface) , or includes other equivalent solar cells of other types without any front electrode.
  • a cell unit includes a cell 31 and conductive wires 32 constituted by a metal wire S.
  • a solar cell array 30 includes a plurality of cells 31 and conductive wires 32 which connect adjacent cells 31 and are constituted by the metal wire S.
  • the solar cell array 30 is formed of a plurality of cells 31 connected by the conductive wires 32.
  • the metal wire S constitutes the conductive wires 32 of the cell unit, and extends between surfaces of the adjacent cells 31, which shall be understood in a broad sense that the metal wire S may extend between front surfaces of the adjacent cells 31, or may extend between a front surface of a first cell 31 and a back surface of a second cell 31 adjacent to the first cell 31.
  • the conductive wires 32 may include front conductive wires 32A extending on the front surface of the first cell 31 and electrically connected with the secondary grid lines 312 of the first cell 31, and back conductive wires 32B extending on the back surface of the second cell 31 and electrically connected with the back electrodes 314 of the second cell 31.
  • Part of the metal wire S between the adjacent cells 31 can be called connection conductive wires.
  • the cell substrate 311, the cell 31, the cell unit, the cell array 30 and the solar cell module are only for the convenience of description, and shall not be construed to limit the present disclosure.
  • orientation terms such as “upper” and “lower” usually refer to the orientation “upper” or “lower” as shown in the drawings under discussion, unless specified otherwise; “front surface” refers to a surface of the solar cell module facing the light in practical application (for example, when the module is in operation) , i.e. a shiny surface on which light is incident, while “back surface” refers to a surface of the solar cell module back to the light in practical application.
  • the solar cell module 100 includes an upper cover plate 10, a front adhesive layer 20, a cell array 30, a back adhesive layer 40 and a back plate 50.
  • the cell array 30 includes a plurality of cells 31.
  • the adjacent cells 31 are connected with a plurality of conductive wires 32 constituted by a metal wire S which extends reciprocally between surfaces of adjacent cells.
  • the metal wire includes a metal wire body 321 and a conductive adhesive 322 coating the metal wire body 321.
  • the conductive wires 32 are in contact with the cells, the front adhesive layer 20 in direct contact with the conductive wires 32 and filling between adjacent conductive wires 32.
  • the solar cell module 100 includes the upper cover plate 10, the front adhesive layer 20, the cell array 30, the back adhesive layer 40 and the back plate 50 superposed sequentially along a direction from up to down.
  • the cell array 30 includes a plurality of cells 31 and conductive wires 32 for connecting the plurality of cells 31.
  • the conductive wires 32 are constituted by the metal wire S which extends reciprocally between surfaces of two adjacent cells 31.
  • the metal wire includes the metal wire body 321 and the conductive adhesive 322 coating the metal wire body 321.
  • the conductive adhesive 322 coats the whole metal wire body 321 to form a metal wire S.
  • the conductive wires 32 are electrically connected with the cells 31, in which the front adhesive layer 20 on the cells 31 contacts with the conductive wires 32 directly and fills between the adjacent conductive wires 32, such that the front adhesive layer 20 can separate the conductive wires 32 from air and moisture from the outside world, so as to prevent the conductive wires 32 from oxidation and to guarantee the photoelectric conversion efficiency.
  • the conductive adhesive has been cured and bound with the cell before the front adhesive layer melts, so as to guarantee the connection strength of the conductive wire and the cell, to prevent the conductive wire from drifting, and to improve the photoelectric conversion efficiency of the solar cell module.
  • the metal wire S refers to a metal wire for extending reciprocally on the cells 31 to form the conductive wires 32; and the conductive wires 32 include a metal wire body 321 and a conductive adhesive 322 coating the metal wire body 321, i.e. the metal wire S consists of the metal wire body 321 and the conductive adhesive 322 coating the metal wire body 321.
  • the metal wire represents the metal wire S which extends reciprocally on the cells to form the conductive wires 32.
  • the conductive wires 32 constituted by the metal wire S which extends reciprocally replace traditional primary grid lines and solder strips, so as to reduce the cost.
  • the metal wire S extends reciprocally to decrease the number of free ends of the metal wire S and to save the space for arranging the metal wire S, i.e. without being limited by the space.
  • the number of the conductive wires 32 constituted by the metal wire which extends reciprocally may be increased considerably, which is easy to manufacture, and thus is suitable for mass production.
  • the metal wire coated with the conductive adhesive on its surface serve as the metal wire S to constitute the conductive wires 32, such that the conductive wires 32 are connected with the cell via the conductive adhesive.
  • the conductive adhesive has been cured and bound with the cell before the front adhesive layer melts, so as to solve the problem that the metal wire drifts due to the melting of the front adhesive layer in the laminating process, and to obtain relatively high photoelectric conversion efficiency of the solar cell module.
  • the front adhesive layer 20 contacts with the conductive wires 32 directly and fills between the adjacent conductive wires 32, which can effectively isolate the conductive wires from air and moisture to prevent the conductive wires 32 from oxidation to guarantee the photoelectric conversion efficiency.
  • the front adhesive layer 20 and the back adhesive layer 40 are adhesive layers commonly used in the art.
  • the front adhesive layer 20 and the back adhesive layer 40 are polyethylene-octene elastomer (POE) and/or ethylene-vinyl acetate copolymer (EVA) respetively.
  • polyethylene-octene elastomer (POE) and/or ethylene-vinyl acetate copolymer (EVA) are conventional products in the art, or can be obtained in a method known to those skilled in the art.
  • the upper cover plate 10 and the back plate 50 can be selected and determined by conventional technical means in the art.
  • the upper cover plate 10 and the back plate 50 can be transparent plates respectively, for example, glass plates.
  • the conductive wires can be first bound, via the conductive adhesive, with the secondary grid lines 312 on the front surface of the first cell 31 and the back electrodes 314 on the back surface of the second cell 31, so as to form a cell array 30. Then, the upper cover plate 10, the front adhesive layer 20, the cell array 30, the back adhesive layer 40 and the back plate 50 are superposed and laminated to obtain the solar cell module 100.
  • the solar cell array 30 includes a plurality of cells 31.
  • the adjacent cells 31 are connected by a plurality of conductive wires 32 which are constituted by a metal wire extending reciprocally between surfaces of the adjacent cells.
  • the metal wire S includes a metal wire body 321 and a conductive adhesive 322 coating the metal wire body 321.
  • the conductive wires 32 and the cell 31 form electric connection via the conductive adhesive. Or it can be said that the metal wire S extends reciprocally between the surfaces of the adjacent cells 31 to form the conductive wires 32.
  • the cell unit is formed by the cell 31 and the conductive wires 32 constituted by the metal wire S which extends on the surface of the cell 31.
  • the solar cell array 30 according to the embodiments of the present disclosure are formed with a plurality of cell units; the conductive wires 32 of the plurality of cells are formed by the metal wire S which extends reciprocally between the surfaces of the cells 31.
  • the metal wire S extends reciprocally between surfaces of the cells 31.
  • the metal wire S may extend reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31 adjacent to the first cell 31; the metal wire S may extend from a surface of the first cell 31 through surfaces of a predetermined number of middle cells 31 to a surface of the last cell 31, and then extends back from the surface of the last cell 31 through the surfaces of a predetermined number of middle cells 31 to the surface of the first cell 31, extending reciprocally like this.
  • the metal wire S can extend on front surfaces of the cells 31, such that the metal wire S constitutes front conductive wires 32A.
  • a first metal wire S extends reciprocally between the front surfaces of the cells 31, and a second metal wire S extends reciprocally between the back surfaces of the cells 31, such that the first metal wire S constitutes front conductive wires 32A, and the second metal wire S constitutes back conductive wires 32B.
  • the metal wire S can extend reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31 adjacent to the first cell 31, such that part of the metal wire S which extends on the front surface of the first cell 31 constitutes front conductive wires 32A, and part thereof which extends on the back surface of the second cell 31 constitutes back conductive wires 32B.
  • the conductive wires 32 can be understood as the front conductive wires 32A, the back conductive wires 32B, or the combination thereof.
  • the term “extending reciprocally” can be understood as that the metal wire S extends reciprocally once to form to two conductive wires 32 which are formed by winding a metal wire S.
  • two adjacent conductive wires form a U-shape structure or a V-shape structure, yet the present disclosure is not limited to the above.
  • the conductive wires 32 of the plurality of cells 31 are constituted by the metal wire S which extends reciprocally; and the adjacent cells 31 are connected by the conductive wires 32.
  • the conductive wires 32 of the cells are not necessarily made of expensive silver paste, and can be manufactured in a simple manner without using a solder strip to connect the cells. It is easy and convenient to connect the metal wire S with the secondary grid lines and the back electrodes, so that the cost of the cells is reduced considerably.
  • the conductive wires 32 are constituted by the metal wire S which extends reciprocally, the width of the conductive wires 32 (i.e. the width of projection of the metal wire on the cell) may be decreased, thereby decreasing the shading area of the conductive wires 32. Further, the number of the conductive wires 32 can be adjusted easily, and thus the resistance of the conductive wires 32 is reduced, compared with the primary grid lines made of the silver paste, and the photoelectric conversion efficiency is improved. Since the metal wire S extends reciprocally to form the conductive wires, when the cell array 30 is used to manufacture the solar cell module 100, the metal wire S will not tend to shift, i.e. the metal wire is not easy to “drift” , which will not affect but further improve the photoelectric conversion efficiency.
  • the solar cell array 30 according to the embodiments of the present disclosure has low cost and high photoelectric conversion efficiency.
  • the metal wire S extends reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31 adjacent to the first cell 31; the front adhesive layer 20 contacts with the conductive wires 32 on the front surface of the first cell 31 directly and fills between the adjacent conductive wires 32 on the front surface of the first cell 31; the back adhesive layer 40 contacts with the conductive wires 32 on the back surface of the second cell 31 directly and fills between the adjacent conductive wires 32 on the back surface of the second cell 31.
  • the adjacent cells 31 are connected by the metal wire S; in the two adjacent cells 31, the front surface of the first cell 31 is connected with the metal wire S, and the back surface of the second cell 31 adjacent to the first cell 31 is connected with the metal wire S.
  • the front adhesive layer 20 of the first cell 31 whose front surface is connected with the metal wire S contacts with the metal wire S on the front surface of the first cell 31 directly and fills between the adjacent conductive wires 32.
  • the back adhesive layer 40 of the second cell 31 whose back surface is connected with the metal wire S contacts with the metal wire S on the back surface of the second cell 31 directly and fills between the adjacent conductive wires 32 (as shown in Fig. 2) .
  • the solar cell module 100 not only the front adhesive layer 20 can separate the conductive wires 32 on the front surfaces of part of the cells 31 from the outside world, but also the back adhesive layer 40 can separate the conductive wires 32 on the back surfaces of part of the cells 31 from the outside world, so as to further guarantee the photoelectric conversion efficiency of the solar cell module 100.
  • the conductive wires 32 located on the back surface of the second cell 31 are electrically connected with the back electrodes 314 of the second cell 31 via the conductive adhesive.
  • the metal wire S extends reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31 adjacent to the first cell 31.
  • the metal wire S forms front conductive wires 32A on the front surface of the first cell 31, and forms back conductive wires 32B on the back surface of the second cell 31.
  • the back conductive wires 32B located on the back surface of the second cell 31 are electrically connected with the back electrodes 314 of the second cell 31, so as to guarantee the effect of connecting the metal wire S and the second cell 31.
  • the metal wire S extends reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31 adjacent to the first cell 31 to form the conductive wires 32.
  • the conductive wires are electrically connected with the secondary grid lines 312 on the front surface of the first cell 31 and the back electrodes 314 on the back surface of the second cell 31, such that two adjacent cells 31 are connected in series.
  • Part of the conductive wires 32 in contact with the secondary grid lines 312 on the front surface of the first cell 31 can be called front conductive wires 32A
  • part of the conductive wires 32 in contact with the back electrodes 314 on the back surface of the second cell 31 can be called back conductive wires 32B.
  • the solar cell array 30 according to a specific embodiment of the present disclosure is illustrated with reference to Fig. 1 to Fig. 3.
  • two cells 31 in the solar cell array 30 are shown. In other words, it shows two cells 31 connected with each other via the conductive wires 32 constituted by the metal wire S.
  • the cell 31 comprises a cell substrate 311, secondary grid lines 312 (i.e. front secondary grid lines 312A) disposed on a front surface of the cell substrate 311, a back electric field 313 disposed on a back surface of the cell substrate 311, and back electrodes 314 disposed on the back electric field 313.
  • the back electrodes 314 may be back electrodes of a traditional cell, for example, printed by the silver paste, or may be back secondary grid lines 312B similar to the secondary grid lines on the front surface of the cell substrate, or may be multiple discrete welding portions, unless specified otherwise.
  • the secondary grid lines refer to the secondary grid lines 312 on the front surface of the cell substrate 311, unless specified otherwise.
  • the solar cell array in the embodiment includes two cells 31A, 31B (called a first cell 31A and a second cell 31B respectively for convenience of description) .
  • the metal wire S extends reciprocally between the front surface of the first cell 31A (ashiny surface, i.e. an upper surface in Fig. 2) and the back surface of the second cell 31B, such that the metal wire S constitutes front conductive wires 32A of the first cell 31A and back conductive wires 32B of the second cell 31B.
  • the metal wire S is electrically connected with the secondary grid lines of the first cell 31A via the conductive adhesive, and electrically connected with the back electrodes of the second cell 31B via the conductive adhesive, as well.
  • the metal wire extends reciprocally between the first cell 31A and the second cell 31B for 10 to 60 times to form 20 to 120 conductive wires.
  • the metal wire extends reciprocally for 12 times to form 24 conductive wires 32, and there is only one metal wire.
  • a single metal wire extends reciprocally for 12 times to form 24 conductive wires, and the distance of the adjacent conductive wires can range from 2.5mm to 15mm.
  • the number of the conductive wires is increased, compared with the traditional cell, such that the distance between the secondary grid lines and the conductive wires which the current runs through is decreased, so as to reduce the resistance and improve the photoelectric conversion efficiency.
  • the adjacent conductive wires form a U-shape structure, for convenience of winding the metal wire.
  • the present disclosure is not limited to the above.
  • the adjacent conductive wires can form a V-shape structure.
  • the metal wire body 321 is a copper wire, yet the present disclosure is not limited thereto.
  • the metal wire body 321 may be an aluminum wire.
  • the metal wire body 321 has a circular cross section, such that more sunlight can reach the cell substrate to further improve the photoelectric conversion efficiency.
  • the metal wire body 321 is coated with a conductive adhesive 322 to form the metal wire S, such that the metal wire S is connected with the secondary grid lines 312 and/or the back electrodes 314 via the coated conductive adhesive 322, so as to facilitate the electrical connection of the metal wire body 321 with the secondary grid lines 312 and/or the back electrodes 314, and to avoid drifting of the metal wire in the connection process so as to guarantee the photoelectric conversion efficiency.
  • the electrical connection of the metal with the cell substrate can be conducted during or before the laminating process of the solar cell module, and preference is given to the latter.
  • the metal wire preferably, before the metal wire contact the cells, the metal wire extends under strain, i.e. straightening the metal wire. After the metal wire is connected with the secondary grid lines and the back electrodes of the cell, the strain of the metal wire can be released, so as to further avoid the drifting of the conductive wires when the solar cell module is manufactured, and to guarantee the photoelectric conversion efficiency.
  • the secondary grid line has a width of 40 to 80 ⁇ m and a thickness of 5 to 20 ⁇ m; there are 50 to 120 secondary grid lines, a distance between adjacent secondary grid lines ranging from 0.5 to 3mm. thus, the structure of the secondary grid lines 312 is more reasonable, so as to obtain a larger sunlight area and higher photoelectric conversion efficiency.
  • a binding force between the metal wire and the cells 31 ranges from 0.1N to 0.8N. That’s to say, the binding force between the conductive wires 32 and the cells 31 ranges from 0.1N to 0.8N.
  • the binding force between the metal wire and the cells ranges from 0.2N to 0.6N, so as to secure the welding between the cells and the metal wire, to avoid sealing-off of the cells in the operation and the transferring process and performance degradation due to poor connection, and to lower the cost.
  • Fig. 5 is a schematic diagram of a solar cell array according to another embodiment of the present disclosure.
  • the metal wire extends reciprocally between the front surface of the first cell 31A and the front surface of the second cell 31B, such that the metal wire constitutes front conductive wires of the first cell 31A and front conductive wires of the second cell 31B.
  • the first cell 31A and the second cell 31B are connected in parallel.
  • the back electrodes of the first cell 31A and the back electrodes of the second cell 31B can be connected via back conductive wires constituted by another metal wire which extends reciprocally.
  • the back electrodes of the first cell 31A and the back electrodes of the second cell 31B can be connected in a traditional manner.
  • Fig. 12 shows a schematic diagram of a solar cell array according to another embodiment of the present disclosure.
  • short grid lines 33 and secondary grid lines 312 are disposed along an edge of the front surface of the cell 31;
  • the secondary grid lines 312 include middle secondary grid lines 3121 intersected with the conductive wires 32 and edge secondary grid lines 3122 non-intersected with the conductive wires 32;
  • the short lines 33 are connected with the edge secondary grid lines 3121, and connected with the conductive wires 32 or at least one middle secondary grid line 3122.
  • the short grid lines 33 connect the edge secondary grid lines 3121 with the conductive wires 32.
  • the short grid lines 33 are perpendicular to the edge secondary grid lines 3121 or middle secondary grid lines 3122. It can be said that the short grid lines 33 are perpendicular to the secondary grid lines 312.
  • the short grid lines 33 are disposed at the edges of the shiny surface of the cell 31, so as to avoid partial current loss because the conductive wires 32 cannot reach the secondary grid lines 312 at the edges of the cell 31 in the winding process, and to further improve the photoelectric conversion efficiency of the solar cell module 100.
  • the solar cell array 30 according to another embodiment of the present disclosure is illustrated with reference to Fig. 6.
  • the solar cell array 30 comprises n ⁇ m cells 31.
  • the column number and the row number can be different. For convenience of description, in Fig.
  • the cells 31 in one row are called a first cell 31, a second cell 31, a third cell 31, a fourth cell 31, a fifth cell 31, and a sixth cell 31 sequentially; in a direction from up to down, the columns of the cells 31 are called a first column of cells 31, a second column of cells 31, a third column of cells 31, a fourth column of cells 31, a fifth column of cells 31, and a sixth column of cells 31 sequentially.
  • the metal wire In a row of the cells 31, the metal wire extends reciprocally between a surface of a first cell 31 and a surface of a second cell 31 adjacent to the first cell 31; in two adjacent rows of cells 31, the metal wire extends reciprocally between a surface of a cell 31 in a a th row and a surface of a cell 31 in a (a+1) th row, and m-1 ⁇ a ⁇ 1.
  • the metal wire in a row of the cells 31, the metal wire extends reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31 adjacent to the first cell 31, so as to connect the cells 31 in one row in series.
  • the metal wire extends reciprocally between a front surface of a cell 31 at an end of the a th row and a back surface of a cell 31 at an end of the (a+1) th row, to connect the two adjacent rows of cells 31 in series.
  • the metal wire extends reciprocally between the surface of the cell 31 at an end of the a th row and the surface of the cell 31 at an end of the (a+1) th row, the end of the a th row and the end of the (a+1) th row located at the same side of the matrix form, as shown in Fig. 6, located at the right side thereof.
  • a first metal wire extends reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31; a second metal wire extends reciprocally between a front surface of the second cell 31 and a back surface of a third cell 31; a third metal wire extends reciprocally between a front surface of the third cell 31 and a back surface of a fourth cell 31; a fourth metal wire extends reciprocally between a front surface of the fourth cell 31 and a back surface of a fifth cell 31; a fifth metal wire extends reciprocally between a front surface of the fifth cell 31 and a back surface of a sixth cell 31.
  • the adjacent cell bodies 31 in the first row are connected in series by corresponding metal wires.
  • a sixth metal wire extends reciprocally between a front surface of the sixth cell 31 in the first row and a back surface of a sixth cell 31 in the second row, such that the first row and the second row are connected in series.
  • a seventh metal wire extends reciprocally between a front surface of the sixth cell 31 in the second row and a back surface of a fifth cell 31 in the second row;
  • a eighth metal wire extends reciprocally between a front surface of the fifth cell 31 in the second row and a back surface of a fourth cell 31 in the second row, until a eleventh metal wire extends reciprocally between a front surface of a second cell 31 in the second row and a back surface of a first cell 31 in the second row, and then a twelfth metal wire extends reciprocally between a front surface of the first cell 31 in the second row and a back surface of a first cell 31 in the third row, such that the second row and the third row are connected in series.
  • the third row and the fourth row are connected in series, the fourth row and the fifth row connected in series, the fifth row and the sixth row connected in series, such that the cell array 30 is manufactured.
  • a bus bar is disposed at the left side of the first cell 31 in the first row and the left side of the first cell 31 in the sixth row respectively; a first bus bar is connected with the conductive wires extending from the left side of the first cell 31 in the first row, and a second bus bar is connected with the conductive wires extending from the left side of the first cell 31 in the sixth row.
  • the cell bodies in the embodiments of the present disclosure are connected in series by the conductive wires –the first row, the second row, the third row, the fourth row, the fifth row and the sixth row are connected in series by the conductive wires.
  • the second and third row, and the fourth and fifth rows can be connected in parallel with a diode respectively to avoid light spot effect.
  • the diode can be connected in a manner commonly known to those skilled in the art, for example, by a bus bar.
  • the present disclosure is not limited to the above.
  • the first and second rows can be connected in series, the third and fourth rows connected in series, the fifth and sixth rows connected in series, and meanwhile the second and third rows are connected in parallel, the fourth and fifth connected in parallel.
  • a bus bar can be disposed at the left or right side of corresponding rows respectively.
  • the cells 31 in the same row can be connected in parallel.
  • a metal wire extends reciprocally from a front surface of a first cell 31 in a first row through the front surfaces of the second to the sixth cells 31.
  • the conductive adhesive 322 contains thermosetting resin and conductive particles, and the thermosetting resin has a curing temperature lower than a melting temperature of the front adhesive layer and the back adhesive layer. Thus, it can be guaranteed that the conductive adhesive 322 is cured and bound with the cell 31 before the front adhesive layer 20 melts.
  • the thermosetting resin has a curing temperature of 20 to 80°C.
  • the adhesive layer is made of polyethylene-octene elastomer (POE) and/or ethylene-vinyl acetate copolymer (EVA)
  • the thermosetting resin whose curing temperature falls in the above range can obtain a better effect.
  • the solar cell module 100 may have higher photoelectric conversion efficiency.
  • thermosetting resin whose curing temperature falls in the above preferable range is at least one of epoxy resin and acrylic resin.
  • a content of the thermosetting resin is 10 to 40 weight percent and a content of the conductive particles is 60 to 90 weight percent, based on the total weight of the conductive adhesive 322.
  • the conductive particles can be common metal particles for forming the conductive adhesive 322, such as silver powders and/or gold powders.
  • the conductive particle has a diameter of 0.1 to 20 ⁇ m, preferably 1 to 10 ⁇ m.
  • the welding layer has a thickness of 1 to 100 ⁇ m, and the metal wire has a cross section of 0.01 to 0.5mm 2 .
  • the solar cell module has a series resistance of 380 to 440m ⁇ per 60 cells.
  • the present disclosure is not limited to 60 cells, and there may be 30 cells, 72 cells, etc.
  • the series resistance of the solar cell module is 456 to 528m ⁇ , and the electrical performance of the cells is better.
  • the solar cell module has an open-circuit voltage of 37.5-38.5V per 60 cells.
  • the present disclosure is not limited to 60 cells, and there may be 30 cells, 72 cells, etc.
  • the short-circuit current is 8.9 to 9.4A, and has nothing to do with the number of the cells.
  • the solar cell module has a fill factor of 0.79 to 0.82, which is independent from the dimension and number of the cells, and can affect the electrical performance of the cells.
  • the solar cell module has a working voltage of 31.5-32V per 60 cells.
  • the present disclosure is not limited to 60 cells, and there may be 30 cells, 72 cells, etc.
  • the working current is 8.4 to 8.6A, and has nothing to do with the number of the cells.
  • the solar cell module has a conversion efficiency of 16.5-17.4%, and a power of 265-280W per 60 cells.
  • a method for manufacturing the solar cell module 100 according to the embodiments of the present disclosure will be illustrated with respect to Fig. 7 to Fig. 9.
  • the method includes the steps of applying a conductive adhesive 322 to a metal wire body 321 to form a metal wire S; forming a plurality of conductive wires 32 by a metal wire S which extends reciprocally between surfaces of the cells 31 and contacts with the surfaces of the cells 31, in which the conductive wires 32 are connected with secondary grid lines 312 of the cell 31 via the conductive adhesive 322, such that adjacent cells 31 are connected by the plurality of conductive wires 32 to form a cell array 30; superposing an upper cover plate 10, a front adhesive layer 20, the cell array 30, a back adhesive layer 40 and a back plate 50 in sequence, in which a front surface of the cell 31 faces the front adhesive layer 20, such that the front adhesive layer 20 contacts with the conductive wires 32 directly and fills between adjacent conductive wires 32; and a back surface of the cell 31 faces the back adhesive layer 40, and laminating them to obtain the solar cell module 100.
  • the metal wire body 321 is first coated with a conductive adhesive 322 to form a metal wire S, and then the metal wire S extends reciprocally between the surfaces of the adjacent cells 31 and contacts with the surfaces of the cells 31 to constitute a plurality of conductive wires 32.
  • the conductive wires 32 and the cell 31 are connected by the conductive adhesive 322.
  • the multiple cells 31 are connected to form the cell array 30.
  • the upper cover plate 10, the front adhesive layer 20, the cell array 30, the back adhesive layer 40 and the back plate 50 are superposed in sequence, in which the front adhesive layer 20 contacts with the conductive wires 32 directly and fills between adjacent conductive wires 32.Finally, the upper cover plate 10, the front adhesive layer 20, the cell array 30, the back adhesive layer 40 and the back plate 50 are laminated to obtain the solar cell module 100 said above.
  • the metal wire extends reciprocally for 12 times under strain.
  • a first cell 31A and a second cell 31B are prepared.
  • a front surface of the first cell 31A is connected with a metal wire
  • a back surface of the second cell 31B is connected with the metal wire, so as to form a cell array 30.
  • Fig. 9 shows two cells 31.
  • the metal wire extends reciprocally to connect the front surface of the first cell 31 and the back surface of the second cell 31 adjacent to the first cell 31, i.e. connecting secondary grid lines of the first cell 31 with back electrodes of the second cell 31 by the metal wire.
  • the metal wire extends reciprocally under strain from two clips at two ends thereof.
  • the adjacent cells are connected in series. As above, the adjacent cells can be connected in parallel by the metal wire in the light of practical requirements.
  • the cell array 30 obtained is superposed with the upper cover plate 10, the front adhesive layer 20, the back adhesive layer 40 and the back plate 50 in sequence, in which the front surfaces of the cells 31 face the front adhesive layer 20, such that the front adhesive layer 20 contacts with the conductive wires 32 directly and fills between adjacent conductive wires 32; the back surfaces of the cells 31 face the back adhesive layer 40, and then they are laminated to obtain the solar cell module 100.
  • the metal wire can be bound or welded with the cells 31, and the connection of the metal wire and the cells 31 can be conducted in the laminating process. Of course, they can be first connected and then laminated.
  • Example 1 is used to illustrate the solar cell module 100 according to the present disclosure and the manufacturing method thereof.
  • a copper wire is coated with a layer of epoxy resin conductive adhesive, in which the copper wire has a cross section of 0.04mm 2 , and the conductive adhesive has a thickness of 16 ⁇ m, so as to obtain the metal wire S.
  • a POE adhesive layer in 1630 ⁇ 980 ⁇ 0.5mm are provided (melting point: 65°C) , and a glass plate in 1633 ⁇ 985 ⁇ 3mm and a polycrystalline silicon cell 31 in 156 ⁇ 156 ⁇ 0.21mm are provided correspondingly.
  • the cell 31 has 91 secondary grid lines (silver, 60 ⁇ m in width, 9 ⁇ m in thickness) , each of which substantially runs through the cell 31 in a longitudinal direction, and the distance between the adjacent secondary grid lines is 1.7mm.
  • the cell 31 has five back electrodes (tin, 1.5mm in width, 10 ⁇ m in thickness) on its back surface. Each back electrode substantially runs through the cell 31 in a longitudinal direction, and the distance between the adjacent back electrodes is 31mm.
  • 60 cells 31 are arranged in a matrix form (six rows and ten columns) .
  • a metal wire extends reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31 under strain.
  • the metal wire extends reciprocally under strain from two clips at two ends thereof, so as to form 15 parallel conductive wires.
  • the distance between parallel adjacent conductive wires is 9.9mm. 10 cells are connected in series into a row, and six rows of the cells of such kind are connected in series into a cell array via the bus bar.
  • an upper glass plate, an upper POE adhesive layer, multiple cells arranged in a matrix form and welded with the metal wire, a lower POE adhesive layer and a lower glass plate are superposed sequentially from up to down, in which the shiny surface of the cell 31 faces the front adhesive layer 20, such that the front adhesive layer 20 contacts with the conductive wires 32 directly and fills between the conductive wires 32; the shady surface thereof faces the back adhesive layer 40, and they are laminated in a laminator so as to obtain the solar cell module A1.
  • the difference of Comparison example 1 and Example 1 lies in that the cells 31 are arranged in a matrix form. 15 metal wires connected in series are stuck on the transparent adhesive film, and then stuck on the solar cell. In two adjacent cells, the metal wire connects a front surface of a first cell and a back surface of a second cell. Then, an upper glass plate, an upper POE adhesive layer, the transparent adhesive film, multiple cells arranged in a matrix form and welded with the metal wire, the transparent adhesive film, a lower POE adhesive layer and a lower glass plate are superposed sequentially from up to down. In such a way, a solar cell module D1 is obtained.
  • Example 2 is used to illustrate the solar cell module 100 according to the present disclosure and the manufacturing method thereof.
  • a copper wire is coated with a layer of acrylate conductive adhesive, in which the copper wire has a cross section of 0.03mm 2 , and the conductive adhesive has a thickness of 10 ⁇ m, so as to obtain the conductive wire.
  • a EVA adhesive layer in 1630 ⁇ 980 ⁇ 0.5mm are provided (melting point: 60°C) , and a glass plate in 1633 ⁇ 985 ⁇ 3mm and a polycrystalline silicon cell 31 in 156 ⁇ 156 ⁇ 0.21mm are provided correspondingly.
  • the cell 31 has 91 secondary grid lines (silver, 60 ⁇ m in width, 9 ⁇ m in thickness) , each of which substantially runs through the cell 31 in a longitudinal direction, and the distance between the adjacent secondary grid lines is 1.7mm.
  • the cell 31 has five back electrodes (tin, 1.5mm in width, 10 ⁇ m in thickness) on its back surface. Each back electrode substantially runs through the cell 31 in a longitudinal direction, and the distance between the adjacent back electrodes is 31mm.
  • 60 cells 31 are arranged in a matrix form (six rows and ten columns) .
  • a metal wire extends reciprocally between a front surface of a first cell 31 and a back surface of a second cell 31 under strain.
  • the metal wire extends reciprocally under strain from two clips at two ends thereof, so as to form 20 parallel conductive wires.
  • the secondary grid lines of the first cell 31 are welded with the conductive wires, and the back electrodes of the second cell 31 are welded with the conductive wires.
  • the distance between parallel adjacent conductive wires is 7mm. Hence, 10 cells are connected in series into a row, and six rows of the cells of such kind are connected in series into a cell array via the bus bar.
  • an upper glass plate, an upper POE adhesive layer, multiple cells arranged in a matrix form and welded with the metal wire, a lower POE adhesive layer and a lower glass plate are superposed sequentially from up to down, in which the shiny surface of the cell 31 faces the front adhesive layer 20, such that the front adhesive layer 20 contacts with the conductive wires 32 directly and fills between the conductive wires 32; the shady surface thereof faces the back adhesive layer 40, and they are laminated in a laminator so as to obtain the solar cell module A2.
  • the solar cell module is manufactured according to the method in Example 1, but the difference compared with Example 1 lies in that the copper wire is coated with a layer of epoxy resin conductive adhesive whose thickness is 5 ⁇ m. In such a way, a solar cell module A3 is obtained.
  • the solar cell module is manufactured according to the method in Example 1, but the difference compared with Example 1 lies in that the copper wire is coated with a layer of acrylate conductive adhesive whose thickness is 3 ⁇ m. In such a way, a solar cell module A4 is obtained.
  • the solar cell module is manufactured according to the method in Example 2, but the difference compared with Example 2 lies in that the copper wire is coated with a layer of epoxy resin conductive adhesive whose thickness is 2 ⁇ m. In such a way, a solar cell module A5 is obtained.
  • the solar cell module is manufactured according to the method in Example 2, but the difference compared with Example 2 lies in that a short grid line 33 (silver, 0.1mm in width) is disposed on the secondary grid line of the shiny surface of the cell 31, and is perpendicular to the secondary grid line for connecting part of the secondary grid line at the edge of the shiny surface of the cell with the conductive wire, as shown in Fig. 12, so as to obtain a solar cell module A6.
  • a short grid line 33 (silver, 0.1mm in width) is disposed on the secondary grid line of the shiny surface of the cell 31, and is perpendicular to the secondary grid line for connecting part of the secondary grid line at the edge of the shiny surface of the cell with the conductive wire, as shown in Fig. 12, so as to obtain a solar cell module A6.
  • the solar cell module is manufactured according to the method in Example 2, but the difference compared with Example 2 lies in that the cells of six columns and six rows are connected in such a manner that in two adjacent rows of cells, the conductive wires extends from a shiny surface of a cell 31 at an end of the a th row (a ⁇ 1) to form electrical connection with a back surface of a cell 31 at an adjacent end of the (a+1) th row, so as to connect the two adjacent rows of cells.
  • the conductive wires for connecting the two adjacent rows of cells 31 are arranged in perpendicular to the conductive wires for connecting the adjacent cells 31 in the two rows. In such a way, the solar cell module A7 is obtained.
  • the fill factor refers to a ratio of the power at the maximum power point of the solar cell module and the maximum power theoretically at zero resistance, and represents the proximity of the actual power with respect to the theoretic maximum power, in which the greater the value is, the higher the photoelectric conversion efficiency is.
  • the series resistance is small, so the fill factor is great.
  • the photoelectric conversion efficiency refers to a ratio of converting the optical energy into electric energy by the module under a standard lighting condition (1000W/m 2 of light intensity) .
  • the series resistance is equivalent to the internal resistance of the solar module, in which the greater the value is, the poorer the performance of the module is.
  • the fill factor represents a ratio of the actual maximum power and the theoretical maximum power of the module, in which the greater the value is, the better the performance of the module is.
  • the open-circuit voltage refers to the voltage of the module in an open circuit under a standard lighting condition.
  • the short-circuit current refers to the current of the module in a short circuit under a standard lighting condition.
  • the working voltage is the output voltage of the module working with the largest power under a standard lighting condition.
  • the working current is the output current of the module working with the largest power under a standard lighting condition.
  • the power is the maximum power which the module can reach under a standard lighting condition.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features.
  • the feature defined with “first” and “second” may comprise one or more of this feature.
  • “a plurality of” means two or more than two, unless specified otherwise.
  • a structure in which a first feature is “on” or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween.
  • a first feature “on, ” “above, ” or “on top of” a second feature may include an embodiment in which the first feature is right or obliquely “on, ” “above, ” or “on top of” the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature “below, ” “under, ” or “on bottom of” a second feature may include an embodiment in which the first feature is right or obliquely “below, ” “under, ” or “on bottom of” the second feature, or just means that the first feature is at a height lower than that of the second feature.

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  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne un module (100) de cellules solaires, son procédé de fabrication et une unité de cellule solaire. Le module (100) de cellules solaires comprend une plaque de recouvrement supérieure (10), une couche adhésive avant (20), un réseau (30) de cellules, une couche adhésive arrière (40) et une plaque arrière (50) superposés dans l'ordre, le réseau (30) de cellules comprenant de multiples cellules (31), des cellules adjacentes (31) connectées par une pluralité de fils conducteurs (32) qui sont constitués d'un fil métallique s'étendant de manière alternée entre les surfaces des cellules adjacentes (31), le fil métallique incluant un corps (321) de fil métallique, et un adhésif conducteur (322) recouvrant le corps (321) de fil métallique, les fils conducteurs (32) étant en contact avec les cellules (31), la couche adhésive avant (20) étant en contact direct avec les fils conducteurs (32) et remplissant l'espace entre des fils conducteurs adjacents (32).
PCT/CN2015/084052 2014-10-31 2015-07-15 Cellule solaire, module de cellules solaires et son procédé de fabrication Ceased WO2016065933A1 (fr)

Applications Claiming Priority (22)

Application Number Priority Date Filing Date Title
CN201410606607 2014-10-31
CN201410606675 2014-10-31
CN201410608577 2014-10-31
CN201410606700 2014-10-31
CN201410608580 2014-10-31
CN201410606601 2014-10-31
CN201410608469.3 2014-10-31
CN201410608579.X 2014-10-31
CN201410606675.0 2014-10-31
CN201410608580.2 2014-10-31
CN201410608579 2014-10-31
CN201410608577.0 2014-10-31
CN201410608469 2014-10-31
CN201410606607.4 2014-10-31
CN201410606601.7 2014-10-31
CN201410608576 2014-10-31
CN201410606700.5 2014-10-31
CN201410608576.6 2014-10-31
CN201510085666.6 2015-02-17
CN201510085666 2015-02-17
CN201510218489.4 2015-04-03
CN201510218489.4A CN106206812B (zh) 2014-10-31 2015-04-30 太阳能电池片、太阳能电池组件及其制备方法

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Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2008263163A (ja) * 2007-03-19 2008-10-30 Sanyo Electric Co Ltd 太陽電池モジュール
US20120103383A1 (en) * 2010-11-03 2012-05-03 Miasole Photovoltaic Device and Method and System for Making Photovoltaic Device
CN102668113A (zh) * 2009-12-25 2012-09-12 三菱电机株式会社 太阳能电池模块
CN202721135U (zh) * 2012-04-06 2013-02-06 聚日（苏州）科技有限公司 一种太阳能电池

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008263163A (ja) * 2007-03-19 2008-10-30 Sanyo Electric Co Ltd 太陽電池モジュール
CN102668113A (zh) * 2009-12-25 2012-09-12 三菱电机株式会社 太阳能电池模块
US20120103383A1 (en) * 2010-11-03 2012-05-03 Miasole Photovoltaic Device and Method and System for Making Photovoltaic Device
CN202721135U (zh) * 2012-04-06 2013-02-06 聚日（苏州）科技有限公司 一种太阳能电池

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