CN114373818A - Solar cell string, cell module and preparation method of cell module - Google Patents
Solar cell string, cell module and preparation method of cell module Download PDFInfo
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- CN114373818A CN114373818A CN202210054988.4A CN202210054988A CN114373818A CN 114373818 A CN114373818 A CN 114373818A CN 202210054988 A CN202210054988 A CN 202210054988A CN 114373818 A CN114373818 A CN 114373818A
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- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000002313 adhesive film Substances 0.000 claims description 46
- 238000004806 packaging method and process Methods 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 31
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 238000005538 encapsulation Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 19
- 238000003475 lamination Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/049—Protective back sheets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
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- 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
Abstract
The application discloses a solar cell string, a cell module and a preparation method of the cell module, wherein the solar cell string comprises a plurality of strings of sub-cell strings and two first bus bars, and the plurality of strings of sub-cell strings are sequentially arranged along the horizontal direction; the two first bus bars are respectively pasted on the positive ends and the negative ends of the plurality of strings of the sub-battery strings which are sequentially arranged, so that the plurality of strings of the sub-battery strings are connected in parallel, and the solar battery string is formed; the sub-battery string comprises a plurality of battery blocks, each battery block consists of a battery piece A and a battery piece B, the battery pieces A and the battery pieces B are distributed at intervals in sequence and have opposite polarities on respective light receiving surfaces and backlight surfaces, and the battery pieces A and the battery pieces B in each sub-battery string are connected in series in sequence through second bus bars. The solar cell string and the cell module provided by the application have the advantages of high power generation efficiency and low cost.
Description
Technical Field
The invention relates to the technical field of solar cell equipment, in particular to a solar cell string, a cell module and a preparation method of the cell module.
Background
A solar cell module is a semiconductor device that converts solar energy into electrical energy. At present, the mainstream products in the photovoltaic industry are conventional components, and have the advantages of mature product process, simple process flow and the like.
Generally, the conventional assembly forms a cell string through a bus bar series welding process in which a bus bar is series-welded from a light receiving surface of a previous cell to a backlight surface of a next cell. Thus, a sufficient safety distance is required between the front and rear battery cells to allow the bus bar to pass through. However, if the distance between two battery sheets is too close, the bus bars are very likely to damage the battery sheets, i.e., damage the battery sheets, when the battery assembly is laminated; if the distance between the two battery pieces is too far, the safe distance between the front and the rear battery pieces can ensure that the effective power generation area of the solar battery component can not be fully utilized, and resources are seriously wasted.
Therefore, the conventional module still has a space for further optimization in terms of effective power generation area, process flow, production cost and the like.
Furthermore, over-cell tiling techniques have also been proposed, namely: the solar cell module is characterized in that the different cell pieces are mutually overlapped and connected in series through adjacent edges, so that the arrangement distance between the cell pieces is effectively shortened, and the effective power generation area of the solar module is fully exerted.
However, in the laminated assembly, the edge grid line of the backlight surface of the rear battery piece needs to be pressed on the top of the edge grid line of the light receiving surface of the front battery piece, and the two are adhered through conductive silver paste. This just so has the step between the battery piece, takes place the risk of lobe of a leaf easily when the lamination, simultaneously, the price that is used for the electrically conductive silver thick liquid of adhesion between the battery piece is higher, greatly increased the manufacturing cost of shingled cell.
Disclosure of Invention
One advantage of the present invention is to provide a solar cell string, wherein the arrangement structures of the cell pieces a and the cell pieces B in the cell block are changed, so that the electrical properties of the light receiving surfaces or the backlight surfaces of two adjacent cell pieces are opposite, and when the two adjacent cell pieces are connected in series, the second bus bar can be attached to the light receiving surfaces or the backlight surfaces, so that the conventional series welding process is changed into an attaching process, the manufacturing difficulty and the production cost of the solar cell string are greatly reduced, and the arrangement distance between the two cell pieces can be greatly reduced, so that the effective power generation area in a unit area is increased.
An advantage of the present invention is to provide a battery module in which the difficulty and cost of manufacturing the battery module are reduced and the effective power generation area per unit area is increased based on the improvement of a solar cell string, while the risk of splintering occurring at the time of lamination processing is effectively avoided.
One advantage of the present invention is to provide a method for manufacturing a battery assembly, which has low manufacturing difficulty and low manufacturing cost, and the manufactured battery assembly has good power generation effect and good structural stability, and is not easy to have a risk of cracking during lamination.
One advantage of the present invention is to provide a method for manufacturing a battery assembly, wherein bus bars are adhered to edge grid lines of a battery piece a and a battery piece B for series connection, so that the amount of the bus bars can be further reduced, the production cost is reduced, the shielding of the bus bars on the battery piece a and the battery piece B can be effectively reduced, the effective power generation area in a unit area is further increased, and the power generation efficiency is improved.
One advantage of the present invention is to provide a method for manufacturing a battery module, in which a battery piece a and a battery piece B are first sliced and insulated, so that the voltage variable range of the solar battery module can be further increased, and the battery module can be conveniently matched with a solar power station system, thereby having a wide application range.
To achieve at least one of the above advantages, according to a first aspect of the present invention, there is provided a solar cell string including:
the multi-string sub-battery strings are sequentially arranged along the horizontal direction, and the two opposite ends along the length direction form a positive end and a negative end respectively; and
the two first bus bars are respectively pasted on the positive end and the negative end of the plurality of strings of the sub-battery strings which are sequentially arranged, so that the plurality of strings of the sub-battery strings are connected in parallel, and the solar battery string is formed;
the sub-battery string comprises a plurality of battery blocks, each battery block consists of a battery piece A and a battery piece B, the battery pieces A and the battery pieces B in the sub-battery string are distributed at intervals in sequence and have opposite polarities on respective light receiving surfaces and backlight surfaces, and the battery pieces A and the battery pieces B in each sub-battery string are connected in series in sequence through second bus bars.
According to an embodiment of the present invention, the widths and thicknesses of the battery piece a and the battery piece B in the length direction of the sub battery string are the same, and the lengths of the battery piece a and the battery piece B in the length direction of the sub battery string are the same or different.
According to an embodiment of the invention, the first bus bar and the second bus bar are implemented as copper strips, aluminum strips or transparent conductive films.
According to an embodiment of the invention, the distance between the battery piece A and the battery piece B is 0.1 mm-5 mm, and the distance between two adjacent battery blocks is 0.1 mm-5 mm.
According to an embodiment of the present invention, the second bus bar is attached to the bus bars of the cell a and the cell B to realize series connection.
According to an embodiment of the present invention, the second bus bar is attached to the adjacent edge grid lines of the battery pieces a and B to realize series connection.
In a second aspect, the present invention also provides a battery assembly comprising:
a photovoltaic backsheet;
the first photovoltaic packaging adhesive film layer is laid on the top of the photovoltaic back plate;
the solar cell string is laid on the top of the first photovoltaic packaging adhesive film layer;
the second photovoltaic packaging adhesive film layer is laid on the top of the solar cell string; and
the photovoltaic front plate is laid on the top of the second photovoltaic packaging adhesive film layer;
the first photovoltaic packaging adhesive film layer and the second photovoltaic packaging adhesive film layer are made of the same material.
In a third aspect, the present invention also provides a method for preparing the aforementioned battery assembly, comprising the following steps:
s11, placing the first sides of the battery pieces a and B respectively upward and aligning them;
s12, pasting the grid lines on the first side surfaces of the battery piece A and the battery piece B by using a bus bar so as to serially connect the battery piece A and the battery piece B into a battery block;
s13, repeating steps S11 and S12 to obtain a plurality of battery blocks, placing a second side of the plurality of battery blocks opposite to the first side upward, arranging the plurality of battery blocks in the manner that the battery pieces a and B are aligned in step S11, adhering the grid lines on the second sides of the battery pieces a and B with bus bars, and connecting the plurality of battery blocks in series to obtain a sub-battery string;
s14, repeating the step S13 to obtain a plurality of strings of sub-battery strings, laying a first photovoltaic packaging adhesive film layer on the top of a photovoltaic back plate, arranging the obtained plurality of strings of sub-battery strings on the top of the first photovoltaic packaging adhesive film layer in a horizontal mode with the light receiving surfaces facing upwards, and connecting the plurality of strings of sub-battery strings in parallel through bus bars to obtain a solar battery string;
s15, laying a second photovoltaic packaging adhesive film layer on the top of the solar cell string, and laying a photovoltaic front plate on the top of the second photovoltaic packaging adhesive film layer to obtain a laminated assembly; and
s16, laminating the laminated sheet assembly to obtain a battery assembly;
wherein the first side is implemented as a light receiving surface or a backlight surface, wherein the grid lines are implemented as main grid lines or edge grid lines.
According to an embodiment of the present invention, in step S11, the cell piece a and the cell piece B are implemented as sliced cells that are subjected to a slicing process and an insulation process.
In a fourth aspect, the present invention also provides another method for preparing the battery assembly, including the following steps:
s21, placing the first sides of the battery pieces a and B respectively upward and aligning them;
s22, pasting the main grid lines on the first side surfaces of the battery piece A and the battery piece B by using a bus bar so as to serially connect the battery piece A and the battery piece B into a battery block;
s23, repeating steps S21 and S22 to obtain a plurality of battery blocks, placing a second side of the plurality of battery blocks opposite to the first side upward, arranging the plurality of battery blocks in the manner that the battery pieces a and B are aligned in step S21, adhering the main grid lines on the second sides of the battery pieces a and B with bus bars, and connecting the plurality of battery blocks in series to obtain a sub-battery string;
s24, repeating the step S23 to obtain a plurality of strings of sub-battery strings, laying a second photovoltaic packaging adhesive film layer on the top of the photovoltaic front plate, arranging the obtained plurality of strings of sub-battery strings with the back light surfaces facing upwards on the top of the second photovoltaic packaging adhesive film layer horizontally, and connecting the plurality of strings of sub-battery strings in parallel through bus bars to obtain a solar battery string;
s25, laying a first photovoltaic packaging adhesive film layer on the top of the solar cell string, and laying a photovoltaic back plate on the top of the first photovoltaic packaging adhesive film layer to obtain a laminated assembly; and
s26, laminating the laminated sheet assembly to obtain a battery assembly;
wherein the first side is implemented as a light receiving surface or a backlight surface, wherein the grid lines are implemented as main grid lines or edge grid lines.
According to an embodiment of the present invention, in step S21, the cell piece a and the cell piece B are implemented as sliced cells that are subjected to a slicing process and an insulation process.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description.
Drawings
Fig. 1 shows a schematic top view of a solar cell string of the present application.
Fig. 2 shows a schematic side view of a solar cell string of the present application.
Fig. 3 shows an exploded structural view of the battery module of the present application.
Fig. 4 shows a schematic top view of a solar cell string with bus bars attached to edge grid lines according to the present application.
Fig. 5 shows a schematic side view of a solar cell string with bus bars attached to edge grid lines according to the present application.
Fig. 6 shows a schematic top view of a solar cell string in which the cell pieces are subjected to a dicing and insulating process in the present application.
Reference numerals: 1-photovoltaic back plate, 2-first photovoltaic packaging adhesive film layer, 3-solar cell string, 4-second photovoltaic packaging adhesive film layer, 5-photovoltaic front plate, 6-sub cell string, 61-positive terminal, 62-negative terminal, 7-bus bar, 71-first bus bar, 72-second bus bar, 8-cell block, 9-cell piece A, 10-cell piece B.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the disclosure of the specification, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those illustrated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and, therefore, the terms should not be construed as limiting the invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
The first embodiment is as follows:
referring to fig. 1 and 2, a solar cell string according to a preferred embodiment of the present invention will be described in detail below, wherein the solar cell string includes a plurality of strings of sub-cell strings 6 and two first bus bars 71, wherein the plurality of strings of sub-cell strings 6 are sequentially arranged along a horizontal direction, and two ends opposite to each other along a length direction form a positive terminal 61 and a negative terminal 62, respectively, and wherein the two first bus bars 71 are respectively attached to the positive terminal 61 and the negative terminal 62 of the plurality of strings of sub-cell strings 6, which are sequentially arranged, so that a plurality of strings of sub-cell strings 6 are connected in parallel to form the solar cell string 3.
More specifically, the sub-battery string 6 includes a plurality of battery blocks 8, and each battery block 8 is composed of a battery slice a9 and a battery slice B10, wherein the battery slices a9 and B10 in the sub-battery string 6 are sequentially spaced and have opposite polarities on the light receiving surface and the backlight surface, respectively, and meanwhile, the battery slices a9 and B10 in each sub-battery string 6 are sequentially connected in series through a second bus bar 72. That is, all the cells a9 in the solar cell string 3 are not adjacent to each other, and all the cells B10 are not adjacent to each other.
It is worth mentioning that when the battery slice a9 and the battery slice B10 are connected in series through the second bus bar 72, the battery slice a9 and the battery slice B10 may be pasted at main grid lines to form a series connection, or the battery slice a9 and the battery slice B10 may be pasted at adjacent edge grid lines to form a series connection, wherein when the second bus bar 72 is pasted at the adjacent edge grid lines of the battery slice a9 and the battery slice B10, the series connection between the battery slice a9 and the battery slice B10 is realized to form the battery block 8, and the series connection between the adjacent battery blocks 8 is realized to form the sub-battery string 6, the usage amount of the second bus bar 72 can be further reduced, which not only reduces the production cost, but also reduces the shielding of the second bus bar 72 on the battery slice a9 and the battery slice B10, further, the effective power generation area per unit area is further increased, the power generation efficiency is further increased, and the power generation cost is reduced.
In one embodiment, the light receiving surface of the cell a9 is a positive electrode, and the backlight surface thereof is a negative electrode, wherein the kind of the cell a9 may be implemented as a P-type cell or a double-sided cell; the light receiving surface of the cell B10 is a negative electrode, and the back surface thereof is a positive electrode, wherein the cell B10 may be an N-type cell or a double-sided cell.
In this way, after a plurality of strings of the sub-battery strings 6 are connected in parallel by the first bus bar 71, since the electrical properties of the light receiving surface and the backlight surface of the battery piece a9 and the battery piece B10 in the battery block 8 are just opposite, when the battery pieces are sequentially distributed at intervals, the second bus bar 72 can be directly attached to the light receiving surface or the backlight surface of the battery piece a9 and the battery piece B10, so that the plurality of battery pieces can be connected in series, and the overlapping condition or the stepped structure is avoided, thereby reducing the risk of splitting when a battery pack is formed by lamination; in addition, the original series welding process of the bus bar is changed into the pasting process, so that the manufacturing difficulty and the manufacturing cost of the solar cell string 3 and the cell module manufactured by the solar cell string 3 are reduced; in addition, because cell piece A9 with arrange in proper order between the cell piece B10, the spacing distance can reduce to 0.1mm, and parallel arrangement does not have the structure of stack formula or step simultaneously, very big improvement the effective generating area of cell piece in the unit area, and then very big improvement solar cell cluster 3 and by the generating efficiency of the battery pack of this solar cell cluster 3 preparation, reduced the generating cost.
As a preferred embodiment, the widths and thicknesses of the cell sheet a9 and the cell sheet B10 in the length direction of the sub-cell string 6 are the same, and the lengths of the cell sheet a9 and the cell sheet B10 in the length direction of the sub-cell string are the same or different, which can be set according to specific situations, so that the application range is wide.
As another preferred embodiment, the first bus bar 71 and the second bus bar 72 are implemented as a copper tape, an aluminum tape, or a transparent conductive film.
Preferably, the distance between the battery piece a9 and the battery piece B10 is 0.1mm to 5mm, such as 0.5mm, 1.2mm, 2.6mm or 3.8mm, and the distance between two adjacent battery blocks 8 is 0.1mm to 5mm, such as 0.5mm, 1.2mm, 2.6mm or 3.8 mm. The device is set according to specific conditions, so that the effective power generation area in a unit area can be effectively ensured, and the power generation efficiency is further improved.
Example two:
the invention also provides a battery pack. With reference to fig. 1 to 3, the battery assembly includes a photovoltaic back sheet 1, a first photovoltaic encapsulation adhesive film layer 2, the aforementioned solar battery string 3, a second photovoltaic encapsulation adhesive film layer 4 and a photovoltaic front sheet 5, wherein the first photovoltaic encapsulation adhesive film layer 2 is laid on top of the photovoltaic back sheet 1, the solar battery string 3 is laid on top of the first photovoltaic encapsulation adhesive film layer 2, the second photovoltaic encapsulation adhesive film layer 4 is laid on top of the solar battery string 3, and the photovoltaic front sheet 5 is laid on top of the second photovoltaic encapsulation adhesive film layer 4; the first photovoltaic encapsulation adhesive film layer 2 and the second photovoltaic encapsulation adhesive film layer 4 are made of the same material and can be implemented as one of ethylene vinyl acetate copolymer, ethylene octene copolymer and polyvinyl butyral. Through utilizing aforementioned solar cell cluster 3 for this photovoltaic module not only the preparation is convenient, low in manufacturing cost, still is difficult for appearing the risk of lobe of a leaf when lamination simultaneously, and the effective generating area in the unit area is bigger moreover, has better generating efficiency.
In some embodiments, the photovoltaic backsheet 1 is implemented as a glass backsheet, an organic polymer backsheet or a composite backsheet.
In some embodiments, the photovoltaic front sheet 5 is implemented as a glass front sheet, an organic polymer front sheet or a composite front sheet.
Example three:
the invention also provides a preparation method of the battery component, which comprises the following steps:
s11, placing the first sides of the battery pieces a and B respectively upward and aligning them;
s12, pasting the grid lines on the first side surfaces of the battery piece A and the battery piece B by using a bus bar so as to serially connect the battery piece A and the battery piece B into a battery block;
s13, repeating steps S11 and S12 to obtain a plurality of battery blocks, placing a second side of the plurality of battery blocks opposite to the first side upward, arranging the plurality of battery blocks in the manner that the battery pieces a and B are aligned in step S11, adhering the grid lines on the second sides of the battery pieces a and B with bus bars, and connecting the plurality of battery blocks in series to obtain a sub-battery string;
s14, repeating the step S13 to obtain a plurality of strings of sub-battery strings, laying a first photovoltaic packaging adhesive film layer on the top of a photovoltaic back plate, arranging the obtained plurality of strings of sub-battery strings on the top of the first photovoltaic packaging adhesive film layer in a horizontal mode with the light receiving surfaces facing upwards, and connecting the plurality of strings of sub-battery strings in parallel through bus bars to obtain a solar battery string;
s15, laying a second photovoltaic packaging adhesive film layer on the top of the solar cell string, and laying a photovoltaic front plate on the top of the second photovoltaic packaging adhesive film layer to obtain a laminated assembly; and
s16, laminating the laminated sheet assembly to obtain a battery assembly;
wherein the first side surface is implemented as a light receiving surface or a backlight surface, that is, in the process of forming the battery block in steps S11 and S12, the light receiving surfaces of the battery piece a and the battery piece B may be first faced upward and then bonded with a bus bar to be connected in series, or the backlight surfaces of the battery piece a and the battery piece B may be first faced upward and then bonded with a bus bar to be connected in series; accordingly, in the process of forming the sub-battery string in step S13, the backlight surfaces of the battery pieces a and B in the battery block may be faced upward and bonded with bus bars on the upper surfaces for series connection, or the light-receiving surfaces of the battery pieces a and B in the battery block may be faced upward and bonded with bus bars on the upper surfaces for series connection;
in the solar cell string 3, when the bus bar 7 is used to adhere to the edge grid lines of the cell slice a9 and the cell slice B10, so as to form the cell block 8 by connecting the cell slice a9 and the cell slice B10 in series and to form the sub cell string 6 by connecting the adjacent cell blocks 8 in series, the usage amount of the bus bar 7 can be further reduced, which not only reduces the production cost, but also reduces the shielding of the bus bar 7 on the cell slice a9 and the cell slice B10, further improves the effective power generation area per unit area, further improves the power generation efficiency, and reduces the power generation cost, as shown in fig. 4 and 5.
As a preferred embodiment, the same points as those in the third embodiment will not be described again, and the differences are as follows: in the first embodiment, in which the structure of the solar cell string 3 is changed, in conjunction with fig. 6, in step S11, the cell piece a9 and the cell piece B10 are implemented as sliced cells that are subjected to a slicing process and an insulation process.
For example, 156mm by 156mm cell pieces are cut into half cells, 182mm by 182mm cell pieces are cut into 6 cell pieces, or 210mm by 210mm cell pieces are cut into 7 cell pieces, and the like. The above are only examples and are not limited to these cutting methods. The cell sheet A9 and the cell sheet B10 are subjected to slicing processing and insulation processing, such as laser insulation processing, so that the voltage variable range of the solar cell module can be further improved, the solar cell module is more favorably matched with a solar power station system, and the application range is wider.
Preferably, the distance between the battery piece a and the battery piece B is 0.1mm to 5mm, such as 0.5mm, 1.2mm, 2.6mm or 3.8mm, and the distance between two adjacent battery blocks is 0.1mm to 5mm, such as 0.5mm, 1.2mm, 2.6mm or 3.8 mm. The device is set according to specific conditions, so that the effective power generation area in a unit area can be effectively ensured, and the power generation efficiency is further improved.
Example four:
the invention also provides another preparation method of the battery pack, which comprises the following steps:
s21, placing the first sides of the battery pieces a and B respectively upward and aligning them;
s22, pasting the main grid lines on the first side surfaces of the battery piece A and the battery piece B by using a bus bar so as to serially connect the battery piece A and the battery piece B into a battery block;
s23, repeating steps S21 and S22 to obtain a plurality of battery blocks, placing a second side of the plurality of battery blocks opposite to the first side upward, arranging the plurality of battery blocks in the manner that the battery pieces a and B are aligned in step S21, adhering the main grid lines on the second sides of the battery pieces a and B with bus bars, and connecting the plurality of battery blocks in series to obtain a sub-battery string;
s24, repeating the step S23 to obtain a plurality of strings of sub-battery strings, laying a second photovoltaic packaging adhesive film layer on the top of the photovoltaic front plate, arranging the obtained plurality of strings of sub-battery strings with the back light surfaces facing upwards on the top of the second photovoltaic packaging adhesive film layer horizontally, and connecting the plurality of strings of sub-battery strings in parallel through bus bars to obtain a solar battery string;
s25, laying a first photovoltaic packaging adhesive film layer on the top of the solar cell string, and laying a photovoltaic back plate on the top of the first photovoltaic packaging adhesive film layer to obtain a laminated assembly; and
s26, laminating the laminated sheet assembly to obtain a battery assembly;
wherein the first side is implemented as a light receiving surface or a backlight surface, wherein the grid lines are implemented as main grid lines or edge grid lines. In short, in contrast to the progressive forward-laying method from the photovoltaic back sheet to the photovoltaic front sheet provided in the third embodiment, the fourth embodiment provides a progressive reverse-laying method from the photovoltaic front sheet to the photovoltaic back sheet, that is, a reverse-laying process is provided, and other steps are not changed and are not repeated herein.
Preferably, in step S21, the battery piece a and the battery piece B are implemented as sliced batteries that are subjected to a slicing process and an insulation process.
It should be noted that the terms "first, second, third and fourth" in the present invention are used for descriptive purposes only, do not denote any order, are not to be construed as indicating or implying any relative importance, and are to be construed as names.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (10)
1. A solar cell string, comprising:
the multi-string sub-battery strings are sequentially arranged along the horizontal direction, and the two opposite ends along the length direction form a positive end and a negative end respectively; and
the two first bus bars are respectively pasted on the positive end and the negative end of the plurality of strings of the sub-battery strings which are sequentially arranged, so that the plurality of strings of the sub-battery strings are connected in parallel, and the solar battery string is formed;
the sub-battery string comprises a plurality of battery blocks, each battery block consists of a battery piece A and a battery piece B, the battery pieces A and the battery pieces B in the sub-battery string are distributed at intervals in sequence and have opposite polarities on respective light receiving surfaces and backlight surfaces, and the battery pieces A and the battery pieces B in each sub-battery string are connected in series in sequence through second bus bars.
2. The solar cell string according to claim 1, wherein the widths and thicknesses of the cell sheet a and the cell sheet B in the length direction of the sub-cell string are the same, and the lengths of the cell sheet a and the cell sheet B in the length direction of the sub-cell string are the same or different.
3. The solar cell string according to claim 1, wherein the first bus bar and the second bus bar are implemented as copper strips, aluminum strips, or transparent conductive films.
4. The solar cell string according to claim 1, wherein the distance between the cell piece a and the cell piece B is 0.1mm to 5mm, and the distance between two adjacent cell blocks is 0.1mm to 5 mm.
5. The solar cell string according to any one of claims 1 to 4, wherein the second bus bar is attached to the bus bars of the cell pieces A and B to realize series connection.
6. The solar cell string according to any one of claims 1 to 4, wherein the second bus bar is attached to the adjacent edge grid lines of the cell pieces A and B to realize series connection.
7. A battery assembly, comprising:
a photovoltaic backsheet;
the first photovoltaic packaging adhesive film layer is laid on the top of the photovoltaic back plate;
the solar cell string according to any one of claims 1 to 6, which is laid on top of the first photovoltaic encapsulation adhesive film layer;
the second photovoltaic packaging adhesive film layer is laid on the top of the solar cell string; and
the photovoltaic front plate is laid on the top of the second photovoltaic packaging adhesive film layer;
the first photovoltaic packaging adhesive film layer and the second photovoltaic packaging adhesive film layer are made of the same material.
8. A method of making a battery assembly as defined in claim 7, comprising the steps of:
s11, placing the first sides of the battery pieces a and B respectively upward and aligning them;
s12, pasting the grid lines on the first side surfaces of the battery piece A and the battery piece B by using a bus bar so as to serially connect the battery piece A and the battery piece B into a battery block;
s13, repeating steps S11 and S12 to obtain a plurality of battery blocks, placing a second side of the plurality of battery blocks opposite to the first side upward, arranging the plurality of battery blocks in the manner that the battery pieces a and B are aligned in step S11, adhering the grid lines on the second sides of the battery pieces a and B with bus bars, and connecting the plurality of battery blocks in series to obtain a sub-battery string;
s14, repeating the step S13 to obtain a plurality of strings of sub-battery strings, laying a first photovoltaic packaging adhesive film layer on the top of a photovoltaic back plate, arranging the obtained plurality of strings of sub-battery strings on the top of the first photovoltaic packaging adhesive film layer in a horizontal mode with the light receiving surfaces facing upwards, and connecting the plurality of strings of sub-battery strings in parallel through bus bars to obtain a solar battery string;
s15, laying a second photovoltaic packaging adhesive film layer on the top of the solar cell string, and laying a photovoltaic front plate on the top of the second photovoltaic packaging adhesive film layer to obtain a laminated assembly; and
s16, laminating the laminated sheet assembly to obtain a battery assembly;
wherein the first side is implemented as a light receiving surface or a backlight surface, wherein the grid lines are implemented as main grid lines or edge grid lines.
9. The method for producing a battery module according to claim 8, wherein in step S11, the battery piece a and the battery piece B are implemented as sliced batteries subjected to a slicing process and an insulation process.
10. A method of making a battery assembly as defined in claim 7, comprising the steps of:
s21, placing the first sides of the battery pieces a and B respectively upward and aligning them;
s22, pasting the main grid lines on the first side surfaces of the battery piece A and the battery piece B by using a bus bar so as to serially connect the battery piece A and the battery piece B into a battery block;
s23, repeating steps S21 and S22 to obtain a plurality of battery blocks, placing a second side of the plurality of battery blocks opposite to the first side upward, arranging the plurality of battery blocks in the manner that the battery pieces a and B are aligned in step S21, adhering the main grid lines on the second sides of the battery pieces a and B with bus bars, and connecting the plurality of battery blocks in series to obtain a sub-battery string;
s24, repeating the step S23 to obtain a plurality of strings of sub-battery strings, laying a second photovoltaic packaging adhesive film layer on the top of the photovoltaic front plate, arranging the obtained plurality of strings of sub-battery strings with the back light surfaces facing upwards on the top of the second photovoltaic packaging adhesive film layer horizontally, and connecting the plurality of strings of sub-battery strings in parallel through bus bars to obtain a solar battery string;
s25, laying a first photovoltaic packaging adhesive film layer on the top of the solar cell string, and laying a photovoltaic back plate on the top of the first photovoltaic packaging adhesive film layer to obtain a laminated assembly; and
s26, laminating the laminated sheet assembly to obtain a battery assembly;
wherein the first side is implemented as a light receiving surface or a backlight surface, wherein the grid lines are implemented as main grid lines or edge grid lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210054988.4A CN114373818A (en) | 2022-01-18 | 2022-01-18 | Solar cell string, cell module and preparation method of cell module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210054988.4A CN114373818A (en) | 2022-01-18 | 2022-01-18 | Solar cell string, cell module and preparation method of cell module |
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| CN114373818A true CN114373818A (en) | 2022-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023246632A1 (en) * | 2022-06-19 | 2023-12-28 | 中能创光电科技(常州)有限公司 | Preparation method for photovoltaic cell string and preparation method for photovoltaic module |
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2022
- 2022-01-18 CN CN202210054988.4A patent/CN114373818A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023246632A1 (en) * | 2022-06-19 | 2023-12-28 | 中能创光电科技(常州)有限公司 | Preparation method for photovoltaic cell string and preparation method for photovoltaic module |
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