[go: up one dir, main page]

WO2016065945A1 - Réseau de cellules solaires, module de cellules solaires et leur procédé de production - Google Patents

Réseau de cellules solaires, module de cellules solaires et leur procédé de production Download PDF

Info

Publication number
WO2016065945A1
WO2016065945A1 PCT/CN2015/084077 CN2015084077W WO2016065945A1 WO 2016065945 A1 WO2016065945 A1 WO 2016065945A1 CN 2015084077 W CN2015084077 W CN 2015084077W WO 2016065945 A1 WO2016065945 A1 WO 2016065945A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
metal wire
solar cell
cells
conductive wires
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/084077
Other languages
English (en)
Inventor
Zhiqiang Zhao
Meiling TENG
Nan Wang
Zhanfeng Jiang
Long He
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYD Co Ltd
Original Assignee
BYD Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201510217687.9A external-priority patent/CN106206762B/zh
Priority claimed from CN201520276309.3U external-priority patent/CN204905263U/zh
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to JP2017523441A priority Critical patent/JP2017533597A/ja
Priority to EP15854054.2A priority patent/EP3198655A4/fr
Publication of WO2016065945A1 publication Critical patent/WO2016065945A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/20—Electrodes
    • H10F77/206—Electrodes for devices having potential barriers
    • H10F77/211—Electrodes for devices having potential barriers for photovoltaic cells
    • H10F77/215—Geometries of grid contacts
    • 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 the field of solar cells, and more particularly, to a solar cell array, 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 to 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 cover part of the front surface of the cell. As such, the part of sunlight irradiating to the primary grid lines and the secondary grid lines cannot be converted into electric energy. Thus, the primary grid lines and the secondary grid lines need to be as fine as possible in order for the solar cell module to receive more sunlight.
  • 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 cross section area thereof are, which causes greater loss of electricity due to increased resistivity. Therefore, the primary grid lines and the secondary grid lines shall be designed to achieve a balance between light blocking and electrical 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.
  • a solar cell with three primary grid lines is provided, but still consumes a large amount of silver, and has a high cost. Moreover, three primary grid lines increase the shading area, which lowers the photoelectric conversion efficiency.
  • 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 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.
  • 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 there is no fairly mature product.
  • the metal wires are relatively fine and in a large number. Moreover, the metal wires are connected afterwards and have free ends. Due to the problem concerning the sophistication of the equipment, it cannot be guaranteed that the fine and many metal wires are connected with the cells in accurate positions, especially the accuracy of the positions of the ends. In order to avoid short circuits caused by the metal wire extending beyond the cells, the conductive wires are generally formed in the cells, in which case part of the secondary grid lines at the edges of the cells cannot be connected with the conductive wires well, thereby resulting in current loss.
  • 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 array that is easy to manufacture in low cost, and improves the photoelectric conversion efficiency.
  • the present disclosure further provides a solar cell module having the above solar cell array.
  • the solar cell module is easy to manufacture in low cost, and improves the photoelectric conversion efficiency.
  • the present disclosure further provides a method for manufacturing the solar cell module.
  • a solar cell array includes a plurality of cells and a plurality of conductive wires. Adjacent cells are connected by the plurality of conductive wires.
  • the solar cell array further includes secondary grid lines and short grid lines disposed on a front surface of the cell.
  • the secondary grid lines comprise middle secondary grid lines intersected with the conductive wires and edge secondary grid lines non-intersected with the conductive wires.
  • the short grid lines connect the edge secondary grid lines with the conductive wires or with at least one middle secondary grid line.
  • the short grid lines are disposed on the front surface of the cell, so as to electrically connect the edge secondary grid lines non-intersected with the conductive wires at the edge of the cell with the conductive wires, thereby reducing current loss.
  • the short grid lines can be formed by screen printing silver, which is easy to realize and to control with high accuracy.
  • the electric connection of all the fine grid lines and the conductive wires can be guaranteed, which lowers the sophistication and difficulty of the process, and improves the photoelectric conversion efficiency of the cell considerably.
  • the present disclosure further gives preference to connection of adjacent cells by the plurality of conductive wires.
  • the conductive wires are constituted by the metal wire. At least one metal wire extends reciprocally between a surface of a first cell and a surface of a second cell adjacent to the first cell, so as to form at least two conductive wires.
  • the conductive wires are constituted by the metal wire which extends reciprocally.
  • the metal wire extends reciprocally between the two adjacent cells in a winding way to form a folded shape.
  • the conductive wires of this structure are easy to manufacture in low cost, and can improve the photoelectric conversion efficiency of the solar cell array.
  • the conductive wires are arranged in a winding way to avoid all the problems due to cutting the conductive wires.
  • the edges of the cells cannot be reached in the manner of wire winding.
  • the inventors of the present disclosure find out preferable embodiments after a long-term research, i.e. regarding the solar cell whose conductive wires are formed by wire winding.
  • the short grid lines are disposed on part of the secondary grid lines at the edges of the front surface of the cell, so as to avoid partial current loss because the conductive wires arranged in the winding way cannot reach the secondary grid lines at the edges of the cell, to further improve the photoelectric conversion efficiency of the solar cell module.
  • the 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 being a solar cell array according to the above embodiments.
  • a method for manufacturing a solar cell module includes: forming a cell array with a plurality of cells, in which secondary grid lines and short grid lines are disposed on a front surface of the cell; the secondary grid lines include middle secondary grid lines intersected with the conductive wires and edge secondary grid lines non-intersected with the conductive wires, the short grid lines being connected with the edge secondary grid lines, and being connected with the conductive wires or at least one middle secondary grid line; 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, a back surface thereof facing the back adhesive layer, and laminating them to obtain the solar cell module.
  • the present disclosure relates to the solar cells connected by the metal wires.
  • the short grid lines are disposed on the front surface of the cells to solve the accuracy problem of connection between the metal wire and the cell, to avoid current loss.
  • the process is simple and easy to realize, and can lower the cost considerably.
  • Fig. 1 is a plan view of a solar cell array according to an embodiment of the present disclosure
  • Fig. 2 is a longitudinal sectional view of a solar cell array according to an embodiment of the present disclosure
  • Fig. 3 is a transverse 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.
  • 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.
  • the 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.
  • 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.
  • the cell 31 comprises a silicon chip, some processing layers on a surface of the silicon chip, secondary grid lines on a front surface, and a back electric field 313 and back electrodes 314 on 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 cell 31 and electrically connected with the secondary grid lines 312 of the cell 31, and back conductive wires 32B extending on the back surface of the cell 31 and electrically connected with the back electrodes 314 of the cell 31.
  • Part of the metal wire S between the adjacent cells 31 can be called connection conductive wires.
  • 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 when the module is in operation, i.e. a surface on which light is incident, while “back surface” refers to a surface of the solar cell module back to the light when the module is in operation.
  • the solar cell array 30 comprises a plurality of cells 31 and conductive wires 32; secondary grid lines 312 and short grid lines 33 are disposed on a front surface of the cell; the secondary grid line 312 comprises middle secondary grid lines 3122 intersected with the conductive wires 32 and edge secondary grid lines 3121 non-intersected with the conductive wires 32, the short grid lines 33 being connected with the edge secondary grid lines 3121, and being connected with the conductive wires 32 or at least one middle secondary grid line 3122.
  • the present disclosure relates to the solar cells connected by the conductive wires 32.
  • the short grid lines 33 are disposed on the front surface of the cell 31 to solve the accuracy problem of connection between the conductive wires 32 and the cell 31, to avoid current loss.
  • the process is simple and easy to realize, and can lower the cost considerably.
  • adjacent cells 31 are connected by the plurality of conductive wires 32.
  • the conductive wires 32 are constituted by the metal wire S. At least one metal wire S extends reciprocally between a surface of a first cell 31 and a surface of a second cell 31 adjacent to the first cell 31, so as to form at least two conductive wires 32.
  • the present disclosure is not limited to that all the conductive wires are formed by winding the metal wire–the conductive wires can be partially or completely formed by winding the metal wire.
  • the reciprocal extension can be back and forth once. There is no limit to the termination point of the reciprocal extension–the starting point and the termination point can be at the same cell or at different cells, as long as the metal wire is winded.
  • the solar cell array 30 in the present disclosure consists of at least two cells 31, each of which comprises a cell substrate 311, secondary grid lines 312 and short lines 33 disposed on a front surface of the cell substrate 311, and back electrodes 314 disposed on a back surface of the cell substrate 311.
  • Adjacent cells 31 are connected by a plurality of conductive wires 32 constituted by a metal wire S which extends reciprocally between the adjacent cells 31.
  • the secondary grid lines 312 located at a side surface of the cell substrate 311 comprises two parts–one part of the secondary grid lines 312 intersected with the conductive wires 32 and located in a middle position of the cell substrate 311 to form middle secondary grid lines 3122; the other part of the secondary grid lines 312 non-intersected with the conductive wires 32 and located at an edge of one side away from the conductive wires 32 to form edge secondary grid lines 3121.
  • the edge secondary grid lines 3121 are provided with short grid lines 33 connected with the conductive wires 32 or at least one middle secondary grid line 3122.
  • the short grid lines 33 are located at the edges of the cell 31 where the conductive wires 32 cannot reach when being winded, so as to avoid current loss.
  • the conductive wires 32 are constituted by the metal wire which extends reciprocally.
  • the conductive wires 32 of this structure extend reciprocally between two adjacent cells in a winding way to form a folded shape, which is easy to manufacture in low cost, and can improve the photoelectric conversion efficiency of the solar cell array 30.
  • the conductive wires 32 are arranged in a winding way, such that problems caused by cutting off the conductive wires 32 can be avoided.
  • the short grid lines 33 are disposed on the secondary grid lines 312 at the edge of the front surface of the cell 31, such that the current will not be wasted because the conductive wires 32 cannot reach the secondary grid lines 312 at the edge of the cell 31, so as to further improve the photoelectric conversion efficiency of the solar cell module.
  • 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.
  • extending reciprocally in the disclosure can be called “winding” which refers to that the metal wire S extends between the surfaces of the cells 31 along a reciprocal route.
  • 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, such that the metal wire S constitutes a front conductive wire 32A.
  • a first metal wire S extends reciprocally between the front surfaces of the cells, and a second metal wire S extends reciprocally between the back surfaces of the cells, such that the first metal wire S constitutes a front conductive wire 32A, and the second metal wire S constitutes a back conductive wire 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 a front conductive wire 32A, and part thereof which extends on the back surface of the second cell 31 constitutes a back conductive wire 32B.
  • the conductive wire 32 can be understood as the front conductive wire 32A, the back conductive wire 32B, or the combination thereof.
  • the term “extending reciprocally” can be understood as that the metal wire S extends reciprocally once to form 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.
  • a plurality of conductive wires 32 of the cells 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 line and the back electrode, 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 conductive wires made of the silver paste, and the efficiency of photoelectric conversion 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 a specific embodiment of the present disclosure is illustrated with reference to Fig. 1 to Fig. 3.
  • two cells 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, a secondary grid line 312 (a front secondary grid line 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 a back electrode 314 disposed on the back electric field 313.
  • the back electrode 314 may be a back electrode of a traditional cell, for example, printed by the silver paste, or may be a back secondary grid line 312B similar to the secondary grid line on the front surface of the cell substrate, or may be multiple discrete welding portions, unless specified otherwise.
  • the secondary grid line refers to the secondary grid line 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 (a front 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 a front conductive wire of the first cell 31A and a back conductive wire of the second cell 31B.
  • the metal wire S is electrically connected with the secondary grid line of the first cell 31A (for example, being welded or bounded by a conductive adhesive) , and electrically connected with the back electrode of the second cell 31B.
  • the metal wire extends reciprocally between the first cell 31A and the second cell 31B for 10 to 60 times.
  • the metal wire extends reciprocally for 12 times to form 24 conductive wires, 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 metal wire in the present disclosure is not limited to a single one–there may be multiple metal wires, or multiple metal wires are winded alone.
  • the number of the conductive wires is increased, compared with the traditional cell, such that the distance between the secondary grid line and the conductive wire 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 may form a V-shape structure.
  • the metal wire S includes a metal wire body 321 and a welding layer 322 coating the outer surface of the metal wire body.
  • the metal wire is welded with the secondary grid lines and/or the back electrodes by the welding layer, such that it is convenient to electrically connect the metal with the secondary grid lines and/or the back electrodes, 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 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 welding layer 322 coating the metal wire body 321, i.e. the metal wire S consists of the metal wire body 321 and the welding layer 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 metal wire body 321 is a copper wire.
  • the metal wire S can be a copper wire, too.
  • the metal wire does not include the welding layer 322, but the present disclosure does not limited thereto.
  • the metal wire body 321 can be an aluminum wire.
  • the metal wire S has a circular cross section, such that more sunlight can reach the cell substrate to further improve the photoelectric conversion efficiency.
  • 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.
  • 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 a front conductive wire of the first cell 31A and a front conductive wire of the second cell 31B.
  • the first cell 31A and the second cell are connected in parallel.
  • the back electrode of the first cell 31A and the back electrode of the second cell 31B can be connected via a back conductive wire constituted by another metal wire which extends reciprocally.
  • the back electrode of the first cell 31A and the back electrode of the second cell 31B can be connected in a traditional manner.
  • the adjacent cells 31 are connected by a plurality of conductive wires 32 constituted by the metal wire which extends between a surface of a first cell 31 and a surface of a second cell 31 adjacent to the first cell 31.
  • the metal wire breaks off at a turn after being connected with the cells 31.
  • the short grid lines 33 are connected with the edge secondary grid line 3121 closest to the middle secondary grid lines 3122.
  • the short grid lines 33 are connected with the conductive wires 32.
  • the short grid lines 33 and the metal wire at the front surface of the cell 31 are connected at a turn formed by reciprocal extension.
  • An extra welding point can be added to decrease the probability of breaking the welding portion at the edges, and to further enhance the binding force of the metal wire and the cell.
  • the connection at the turn herein can be understood that the short grid lines 33 have intersection points with the turns, i.e. the short grid lines 33 do not terminate at the turns.
  • the short grid lines 33 are perpendicular to the secondary grid lines 312.
  • the short grid lines 33 are, preferably, electrically connected with bended parts (ends proximate to the edges) of the conductive wires 32 on the front surface of the cell 31. More preferably, at least one short grid line 33 is disposed corresponding with each bended part.
  • the short grid lines 33 have a length of 1 to 10mm, preferably 2.4 to 7mm, a width of 0.05 to 0.5mm, and a thickness of 0.01 to 0.02mm. There are 3 to 40, preferably 6 to 20 short grid lines.
  • the short grid lines 33 can be disposed in the same manner as the secondary grid lines 312 on the front surface of the cell 31.
  • the short grid lines 33 can be printed along with the secondary grid lines 312 by silk-screen printing at the same screen plate (which can be made of silver paste) as the front secondary grid lines 3121.
  • the secondary grid lines 312 have 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.
  • the metal wire breaks off at a turn after being connected with the cell 31.
  • the metal wire breaks off at the turn after being welded with the cell 31 to form multiple independent conductive wires 32.
  • the metal wire breaks off at the turn after being welded with the cell 31 to separate the multiple conductive wires 32, which can decrease the stress between the cells and peeling strength at the joints of the metal wire and the cell, and further improve the photoelectric conversion efficiency of the solar cell array 30.
  • the adjacent cells are connected by a metal wire that extends reciprocally between a surface of a first cell 31 and a surface of a second cell 31 adjacent to the first cell and constitutes the conductive wire 32.
  • a plurality of cells 31 are arranged in an n ⁇ m matrix form, and 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 in a (a+1) th row, in which n represents a column, m represents a row, and m-1 ⁇ a ⁇ 1.
  • the metal wire extends reciprocally between a surface of a cell 31 at an end of the a th row and a surface of a 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.
  • 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.
  • 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 solar cell array 30 is arranged in an n ⁇ m matrix form by a plurality of cells 31. Specifically, in the solar cell array 30, there are multiple cells 31, and the cells are arranged in the n ⁇ m matrix form.
  • the conductive wire 32 extends from a surface of a first cell 31, and is electrically connected with a surface of a second cell 31 adjacent to the first cell 31, to connect the cells 31 in the same row; in two adjacent rows of cells, the conductive wire 32 extends from a surface of a cell 31 in a a th row and is electrically connected with a surface of a cell in a (a+1) th row, to connect the two adjacent rows of cells 31, in which n represents a column, m represents a row, and m-1 ⁇ a ⁇ 1.
  • N can range from 2 to 30, m ranging from 2 to 18.
  • multiple cells 31 are arranged in a 12 ⁇ 6 or 10 ⁇ 6 matrix form, i.e. 10 or 12 cells in a row, six rows in total.
  • the cells 31 in two adjacent rows are directly connected by the conductive wires without using the bus bars, which decreases the number of the bus bars, shortens the connection distance, and reduces the resistance, so as to obtain higher electricity generation performance of the solar cell module.
  • the conductive wire extends from a surface of a cell 31 at an end of a a th row and is electrically connected with a surface of a cell at an end of a (a+1) th row.
  • 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 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 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 the 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 cells 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.
  • 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 a conductive wire extending from the left side of the first cell 31 in the first row, and a second bus bar is connected with a conductive wire extending from the left side of the first cell 31 in the sixth row.
  • the cells 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 cells 31 in the second row to the sixth row.
  • 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. Preferably, 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.
  • the solar cell module 100 according to embodiments of the present disclosure is illustrated with reference to Fig. 10 and Fig. 11.
  • the solar cell module 100 includes an upper cover plate 10, a front adhesive layer 20, the cell array 30, a back adhesive layer 40 and a back plate 50 superposed sequentially along a direction from up to down.
  • 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) .
  • POE polyethylene-octene elastomer
  • EVA ethylene-vinyl acetate copolymer
  • 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 wire can be first bounded or welded with the secondary grid lines and the back electrodes of the cell 31, and then superposed and laminated.
  • the solar module 100 includes an upper cover plate 10, a front adhesive layer 20, the cell array 30, a back adhesive layer 40 and a back plate 50.
  • the cell array 30 includes a plurality of cells 31, and adjacent cells 31 are connected by the plurality of conductive wires 32.
  • the conductive wires 32 are constituted by the metal wire S. At least one metal wire S extends reciprocally between a surface of a first cell 31 and a surface of a second cell 31 adjacent to the first cell 31, so as to form at least two conductive wires 32.
  • the front adhesive layer 20 contacts with the conductive wires 32 directly and fills between the adjacent conductive wires 32.
  • the solar cell module 100 includes an upper cover plate 10, a front adhesive layer 20, the cell array 30, a back adhesive layer 40 and a 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 are constituted by the metal wire S which extends reciprocally between surfaces of two adjacent cells 31.
  • 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 fix the conductive wires 32, and 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 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 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 metal wire S extends reciprocally between a front surface of a first cell and a back surface of a second cell adjacent to the first cell; the front adhesive layer 20 contacts with the conductive wires 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 two adjacent cells 31 are connected by the metal wire S.
  • the front surface of the first cell 31 is connected with the metal wire S
  • the back surface of the second cell 31 is connected with the metal wire S.
  • the front adhesive layer 20 on the first cell 31 whose front surface is connected with the metal wire S is in direct contact with the metal wire S on the front surface of the first cell 31 and fills between the adjacent conductive wires 32.
  • the back adhesive layer 40 on the second cell 31 whose back surface is connected with the metal wire S is in direct contact with the metal wire S on the back surface of the second cell 31 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 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. When there are 72 cells, 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 according to the embodiments of the present disclosure includes the following steps:
  • the secondary grid lines 312 includes middle secondary grid line 3122 intersected with conductive wires 32 and edge secondary grid lines 3121 non-intersected with the conductive wires 32, the short grid lines 33 being connected with the edge secondary grid lines 3121, and being connected with the conductive wires 32 or at least one middle secondary grid line 3122, in which specifically, the short grid lines 33 can be manufactured in the same way as the secondary grid lines 312 on the front surface of the cell 31, for example, screen printed in conjunction with the secondary grid lines and with the help of the same screen printing plate as the front secondary gird lines 3121, and the short grid lines 33 may be made of silver paste.
  • the solar cell array 30 consists of at least two cells 31, each of which comprises a cell substrate 311, secondary grid lines 312 and short grid lines 33 disposed on a front surface of the cell substrate 311, and back electrodes 314 disposed on a back surface of the cell substrate 311.
  • Adjacent cells 31 are connected by a plurality of conductive wires 32 constituted by a metal wire S which extends reciprocally between the adjacent cells 31.
  • the secondary grid lines 312 located at a side surface of the cell substrate 311 comprises two parts–one part of the secondary grid lines 312 intersected with the conductive wires 32 and located in a middle position of the cell substrate 311 to form middle secondary grid lines 3122; the other part of the secondary grid lines 312 non-intersected with the conductive wires 32 and located at an edge of one side away from the conductive wires 32 to form edge secondary grid lines 3121.
  • the edge secondary grid lines 3121 are provided with short grid lines 33 connected with the conductive wires 32 or at least one middle secondary grid line 3122.
  • the short grid lines 33 are located at the edges of the cell 31 where the conductive wires 32 cannot reach when being winded, so as to avoid current loss.
  • the conductive wires 32 are constituted by the metal wire which extends reciprocally.
  • the conductive wires 32 are constituted by the metal wire which extends reciprocally.
  • the conductive wires 32 of this structure extend reciprocally between two adjacent cells in a winding way to form a folded shape, which is easy to manufacture in low cost, and can improve the photoelectric conversion efficiency of the solar cell array 30.
  • the conductive wires 32 are arranged in a winding way, such that problems caused by breaking off the conductive wires 32 can be avoided.
  • the short grid lines 33 are disposed on the secondary grid lines 312 at the edge of the front surface of the cell 31, such that the current will not be wasted because the conductive wires 32 cannot reach the secondary grid lines 312 at the edge of the cell 31, so as to further improve the photoelectric conversion efficiency of the solar cell module.
  • the method includes the steps of preparing a solar array 30, superposing the upper cover plate 10, the front adhesive layer 20, the cell array 30, the back adhesive layer 40 and the back plate 50 in sequence, and laminating them to obtain the solar cell module 100. It can be understood that the method further includes other steps, for example, sealing the gap between the upper cover plate 10 and the back plate 50 by a sealant, and fixing the above components together by a U-shape frame, which are known to those skilled in the art, and thus will be not described in detail herein.
  • the method includes a step of forming a plurality of conductive wires by a metal wire which extends reciprocally surfaces of cells 31 and is electrically connected with the surfaces of cells 31, such that the adjacent cells 31 are connected by the plurality of conductive wires to constitute a cell array 30.
  • the metal wire extends reciprocally for 12 times under strain.
  • a first cell 31 and a second cell 31 are prepared.
  • a front surface of the first cell 31 is connected with a metal wire
  • a back surface of the second cell 31 is connected with the metal wire, such that the cell array 30 is formed.
  • Fig. 9 shows two cells 31.
  • the metal wire which extends reciprocally connects 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 a secondary grid line of the first cell 31 with a back electrode of the second cell 31 by the metal wire.
  • the metal wire extends reciprocally under strain from two clips at two ends thereof.
  • the metal wire can be winded only with the help of two clips, which saves the clips considerably and then reduces the assembling space.
  • the adjacent cells are connected in series.
  • the adjacent cells can be connected in parallel by the metal wire based on 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 a front surface of the cell 31 faces the front adhesive layer 20, a back surface thereof facing the back adhesive layer 40, and laminating them to obtain the solar cell module 100.
  • the metal wire can be bounded or welded with the cell 31 when or before they are laminated.
  • the front adhesive layer 20 is disposed in direct contact with the conductive wires 32. In the process of laminating, the front adhesive layer 20 melts and fills the gaps between adjacent conductive wires 32.
  • the back adhesive layer 40 is disposed in direct contact with the conductive wires 32. In the process of laminating, the back adhesive layer 40 melts and fills the gaps between adjacent conductive wires 32.
  • Example 1 is used to illustrate the solar cell module 100 according to the present disclosure and the manufacturing method thereof.
  • An alloy layer of Sn40%-Bi55%-Pb5% (melting point: 125°C) is attached to a surface of a copper wire, in which the copper wire has a cross section of 0.04mm 2 , and the alloy layer has a thickness of 16 ⁇ m. Hence, the metal wire S is obtained.
  • a POE adhesive layer in 1630 ⁇ 980 ⁇ 0.5mm is provided (melting point: 65°C)
  • 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) on its front surface, 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 short grid lines are printed at an edge of a side of the front surface of the cell by a newly designed secondary grid mesh at the same time of printing the secondary grid lines.
  • the short grid lines are perpendicular to the secondary grid lines, and connected with the outermost secondary grid line at the edge.
  • the short grid line printed has a length of 5.1mm and a width of 0.2mm. There are eight short grid lines.
  • 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, and is intersected with the short gird lines at the turns formed by reciprocal extension, so as to form 15 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 9.9mm.
  • Comparison example 1 lies in that a conventional grid mesh is employed, and the short grid lines are not printed at the same time of printing the secondary grid lines. In such a way, a solar cell module D1 as shown in Fig. 12 is obtained.
  • Comparison example 2 and Comparison example 1 lie in that the cells are arranged in a matrix form; 15 metal wires connected in series are pasted at a transparent adhesive layer, and the metal wires are attached to the solar cells.
  • the metal wire connects a front surface of a first cell and a back surface of a second cell.
  • an upper glass plate, an upper POE adhesive layer, and a first transparent adhesive layer, multiple cells arranged in a matrix form and welded with the metal wire, a second transparent adhesive layer, a lower POE adhesive layer and a lower glass plate are superposed sequentially from up to down.
  • a solar cell module D2 is obtained.
  • Example 2 is used to illustrate the solar cell module 100 according to the present disclosure and the manufacturing method thereof.
  • An alloy layer of Sn40%-Bi55%-Pb5% (melting point: 125°C) is attached to a surface of a copper wire, in which the copper wire has a cross section of 0.03mm 2 , and the alloy layer has a thickness of 10 ⁇ m. Hence, the metal wire S is obtained.
  • a EVA adhesive layer in 1630 ⁇ 980 ⁇ 0.5mm is provided (melting point: 60°C) , and a glass plate in 1650 ⁇ 1000 ⁇ 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) at its front surface, each of which substantially runs through the cell 31 in a longitudinal direction, and the distance between the two 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 the longitudinal direction, and the distance between the two adjacent back electrodes is 31mm.
  • the short grid lines are printed at an edge of a side of the front surface of the cell by a newly designed secondary grid mesh at the same time of printing the secondary grid lines.
  • the short grid lines are perpendicular to the secondary grid lines, and connected with the outermost secondary grid line at the edge.
  • the short grid line printed has a length of 3.4mm and a width of 0.1mm. There are ten short grid lines.
  • 60 cells 31 are arranged in a matrix form (six rows and six 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, and is intersected with the short gird lines at the turns formed by reciprocal extension, 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.
  • the solar cell module is manufactured according to the method in Example 2, but the difference compared with Example 2 lies in that the short grid lines are printed at an edge of a side of the front surface of the cell by a newly designed secondary grid mesh at the same time of printing the secondary grid lines.
  • the short grid lines are perpendicular to the secondary grid lines, and connected with the outermost secondary grid line at the edge.
  • the short grid line printed has a length of 5.1mm and a width of 0.15mm.
  • the turn formed by reciprocal extension is located between the second and the third short grid lines.
  • the short grid lines are intersected with the third secondary grid line. In such a way, a solar cell module A3 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 after being welded the secondary grid lines, the metal wire cuts the arc segments at the turns to form separate and parallel 20 metal wires.
  • the distance between adjacent parallel primary grid lines is 7mm. In such a way, a solar cell module A4 is obtained.
  • the solar cell module is manufactured according to the method in Example 3, but the difference compared with Example 3 lies in that the cell array is connected in such a manner that in two adjacent rows of cells, the conductive wires extend from a front surface of a cell 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, a solar cell module A4 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.

Landscapes

  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne un réseau (30) de cellules solaires, un module (100) de cellules solaires et leur procédé de production. Le réseau (30) de cellules solaires comprend une pluralité de cellules (31) et une pluralité de fils conducteurs (32). Les cellules adjacentes (31) sont connectées par la pluralité de fils conducteurs (32). Chaque cellule (31) a une surface avant sur laquelle la lumière est incidente lorsque la cellule (31) est en fonctionnement et une surface arrière opposée à la surface avant. Le réseau (30) de cellules solaires comprend en outre des lignes (312) de grille secondaires disposées sur la surface avant de la cellule respective (31). Les lignes (312) de grille secondaires comprennent des lignes (3122) de grille secondaires médianes disposées au milieu de la cellule respective (31) et que croisent les fils conducteurs (32). Les lignes (312) de grille secondaires comprennent également des lignes (3121) de grille secondaires de bord disposées sur les bords de la cellule respective (31) et que les fils conducteurs (32) ne croisent pas. Le réseau (30) de cellules solaires comprend également des lignes (33) de grille courtes disposées sur une surface avant de la cellule (31). Les lignes (33) de grille courtes connectent les lignes (3121) de grille secondaires de bord aux fils conducteurs (32) ou à au moins une ligne (3122) de grille secondaire médiane.
PCT/CN2015/084077 2014-10-31 2015-07-15 Réseau de cellules solaires, module de cellules solaires et leur procédé de production Ceased WO2016065945A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017523441A JP2017533597A (ja) 2014-10-31 2015-07-15 太陽電池アレイ、太陽電池モジュール、及びこれらの製造方法
EP15854054.2A EP3198655A4 (fr) 2014-10-31 2015-07-15 Réseau de cellules solaires, module de cellules solaires et leur procédé de production

Applications Claiming Priority (24)

Application Number Priority Date Filing Date Title
CN201410606601 2014-10-31
CN201410606700.5 2014-10-31
CN201410608579.X 2014-10-31
CN201410608469 2014-10-31
CN201410606607.4 2014-10-31
CN201410608580.2 2014-10-31
CN201410608579 2014-10-31
CN201410606601.7 2014-10-31
CN201410608577 2014-10-31
CN201410608580 2014-10-31
CN201410606675.0 2014-10-31
CN201410608577.0 2014-10-31
CN201410606700 2014-10-31
CN201410606675 2014-10-31
CN201410608576.6 2014-10-31
CN201410608469.3 2014-10-31
CN201410606607 2014-10-31
CN201410608576 2014-10-31
CN201510085666 2015-02-17
CN201510085666.6 2015-02-17
CN201520276309.3 2015-04-03
CN201510217687.9 2015-04-03
CN201510217687.9A CN106206762B (zh) 2014-10-31 2015-04-30 太阳能电池片阵列、太阳能电池组件及其制备方法
CN201520276309.3U CN204905263U (zh) 2015-04-30 2015-04-30 太阳能电池片阵列、太阳能电池组件

Publications (1)

Publication Number Publication Date
WO2016065945A1 true WO2016065945A1 (fr) 2016-05-06

Family

ID=55856556

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/084077 Ceased WO2016065945A1 (fr) 2014-10-31 2015-07-15 Réseau de cellules solaires, module de cellules solaires et leur procédé de production

Country Status (1)

Country Link
WO (1) WO2016065945A1 (fr)

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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3198655A4 *

Similar Documents

Publication Publication Date Title
CN106206808B (zh) 太阳能电池组件及其制备方法
US20160126372A1 (en) Solar cell array, solar cell module and manufacturing method thereof
EP3198655A1 (fr) Réseau de cellules solaires, module de cellules solaires et leur procédé de production
EP3198654A1 (fr) Unité de cellule solaire, réseau de cellules solaires, module solaire et leur procédé de fabrication
WO2016065945A1 (fr) Réseau de cellules solaires, module de cellules solaires et leur procédé de production
WO2016065946A1 (fr) Réseau de cellules solaires, module solaire et leur procédé de fabrication
WO2016065931A1 (fr) Réseau de cellules solaires, module solaire et leur procédé de fabrication
CN204905263U (zh) 太阳能电池片阵列、太阳能电池组件
WO2016065936A1 (fr) Procédé de fabrication de module de cellule solaire
WO2016065943A1 (fr) Module photovoltaïque et son procédé de fabrication
WO2016065940A1 (fr) Unité de cellule solaire, réseau de cellules solaires, module de cellule solaire et leur procédé de fabrication
WO2016065944A1 (fr) Module à cellules solaires et son procédé de fabrication
WO2016065942A1 (fr) Réseau de cellules solaires, module de cellule solaire et leur procédé de fabrication
WO2016065947A1 (fr) Réseau de cellules solaires, module de cellules solaires et leur procédé de production
WO2016065933A1 (fr) Cellule solaire, module de cellules solaires et son procédé de fabrication
CN204857753U (zh) 太阳能电池单元、太阳能电池片阵列、太阳能电池组件
WO2016065938A1 (fr) Unité de cellules solaires, réseau de cellules solaires, module de cellules solaires et procédé de fabrication associé
WO2016065954A1 (fr) Unité de cellule solaire, réseau de cellules solaires, module de cellule solaire et leur procédé de fabrication
WO2016065932A1 (fr) Unité de cellule solaire, module de cellules solaires et son procédé de fabrication
WO2016065953A1 (fr) Module solaire et son procédé de fabrication
WO2016065939A1 (fr) Unité de cellule solaire, réseau de cellules solaires, module solaire et leur procédé de fabrication
WO2016065941A1 (fr) Unité de cellule solaire, fil conducteur, réseau, module de cellule et leur procédé de fabrication
WO2016065949A1 (fr) Réseau de cellules solaires, module solaire et leur procédé de fabrication
WO2016065934A1 (fr) Module solaire et son procédé de fabrication
WO2016065952A1 (fr) Unité de cellule solaire, réseau de cellules solaires, module de cellule solaire et leur procédé de fabrication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15854054

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2015854054

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2017523441

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE