CN117199160A - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
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- CN117199160A CN117199160A CN202311181822.XA CN202311181822A CN117199160A CN 117199160 A CN117199160 A CN 117199160A CN 202311181822 A CN202311181822 A CN 202311181822A CN 117199160 A CN117199160 A CN 117199160A
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- photovoltaic module
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- battery
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- 239000012790 adhesive layer Substances 0.000 claims abstract description 179
- 239000010410 layer Substances 0.000 claims description 216
- 239000003292 glue Substances 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 39
- 239000000853 adhesive Substances 0.000 claims description 30
- 230000001070 adhesive effect Effects 0.000 claims description 30
- 229920006037 cross link polymer Polymers 0.000 claims description 14
- 239000011230 binding agent Substances 0.000 claims description 7
- 238000004132 cross linking Methods 0.000 claims description 7
- 239000002356 single layer Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 239000004925 Acrylic resin Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 claims description 5
- QKAJPFXKNNXMIZ-UHFFFAOYSA-N [Bi].[Ag].[Sn] Chemical compound [Bi].[Ag].[Sn] QKAJPFXKNNXMIZ-UHFFFAOYSA-N 0.000 claims description 4
- KHZAWAWPXXNLGB-UHFFFAOYSA-N [Bi].[Pb].[Sn] Chemical compound [Bi].[Pb].[Sn] KHZAWAWPXXNLGB-UHFFFAOYSA-N 0.000 claims description 4
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 239000002052 molecular layer Substances 0.000 claims description 3
- 229920000767 polyaniline Polymers 0.000 claims description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 24
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 24
- 238000003475 lamination Methods 0.000 description 13
- 238000003466 welding Methods 0.000 description 13
- 239000011159 matrix material Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 1
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
Abstract
The application discloses a photovoltaic module, and belongs to the technical field of photovoltaic modules. The photovoltaic module includes: a battery sheet; the plurality of connecting wires are arranged on the surface of the battery piece at intervals; the first adhesive layer is arranged on one side, far away from the battery piece, of the plurality of connecting wires, and is used for fixing the plurality of connecting wires on the surface of the battery piece; the thickness of the first adhesive layer is T along the direction perpendicular to the plane of the battery piece 1 The height of the connecting line is T 2 Wherein T is 1 And T is 2 Is greater than or equal to 0.3 and less than or equal to 1.8.
Description
Technical Field
The application relates to the technical field of photovoltaic modules, in particular to a photovoltaic module.
Background
The photovoltaic module comprises a battery string through which solar energy is converted into electrical energy. The battery string comprises a plurality of battery pieces which are arranged at intervals, and two adjacent battery pieces are connected in series through a welding strip so as to collect current generated by the battery pieces.
In the prior art, one end of a welding strip is usually welded to the surface of one battery piece, and the other end of the welding strip is welded to the surface of another adjacent battery piece, so that two adjacent battery pieces are connected in series.
However, the conventional method of welding the solder strip to the surface of the battery piece has problems of low welding efficiency, high cost and the like.
Disclosure of Invention
The application provides a photovoltaic module, which solves or at least partially solves the problems of low welding efficiency and high cost in the prior art that a welding strip is welded on the surface of a battery piece.
In order to solve the technical problems, the application is realized as follows:
the application discloses a photovoltaic module, comprising: a battery sheet; the plurality of connecting wires are arranged on the surface of the battery piece at intervals; the first adhesive layer is arranged on one side, far away from the battery piece, of the plurality of connecting wires, and is used for fixing the plurality of connecting wires on the surface of the battery piece; the thickness of the first adhesive layer is T along the direction perpendicular to the plane of the battery piece 1 The height of the connecting line is T 2 Wherein T is 1 And T is 2 Is greater than or equal to 0.3 and less than or equal to 1.8.
Alternatively T 1 And T is 2 Is greater than or equal to 0.4 and less than or equal to 1.4.
Alternatively T 1 Greater than or equal to 0.1mm and less than or equal to 0.4mm; t (T) 2 Greater than or equal to 0.15mm and less than or equal to 0.35mm.
Optionally, the first glue layer comprises a layer of pre-crosslinked polymeric adhesive material.
Optionally, the pre-crosslinked polymeric binder material layer has a pre-crosslinking degree of greater than 40%.
Optionally, the pre-crosslinked polymer adhesive material layer is disposed on a side of the first adhesive layer adjacent to the battery sheet, and the pre-crosslinked polymer adhesive material layer is at least partially connected to the battery sheet.
Optionally, the layer of pre-crosslinked polymeric adhesive material comprises at least one of an EVA layer, a POE layer, and a PVB layer.
Optionally, the first adhesive layer is a single-layer structure, and the single-layer structure is an EVA layer.
Optionally, the first adhesive layer is a multilayer structure.
Optionally, the first glue film is bilayer structure, bilayer structure's first glue film includes EVA layer and POE layer, wherein, the EVA layer set up in first glue film is close to one side of battery piece, just the EVA layer butt in the battery piece.
Optionally, the connecting wire comprises a connecting wire matrix and a bonding layer attached to the surface of the connecting wire matrix, and the connecting wire is electrically connected to the battery piece through the bonding layer; the melting point of the bonding layer is less than 165 degrees, and the bonding layer is one of a tin-lead-bismuth layer, a tin-bismuth-silver layer or a tin-indium layer.
Optionally, a transparent oxidized conductive layer is disposed on the surface of the battery piece, and the bonding layer is partially connected to the transparent oxidized conductive layer.
Optionally, the connection wire includes a connection wire substrate, and the connection wire substrate is electrically connected to the battery piece.
Optionally, the photovoltaic module further comprises: the first adhesive layer is arranged between the cover plate and the first adhesive layer, and/or the second adhesive layer is arranged between the back plate and the first adhesive layer.
Optionally, the sum of the thickness of the first adhesive layer and the thickness of the second adhesive layer is greater than or equal to 0.4mm and less than or equal to 0.8mm along the direction perpendicular to the plane of the battery piece.
Optionally, the ratio of the thickness of the first glue layer to the sum of the thicknesses of the first glue layer and the second glue layer ranges from 10% to 45%.
Optionally, at the position of the connecting line, the thickness of the first adhesive layer is greater than or equal to 80 μm and less than or equal to 180 μm, and the thickness of the second adhesive layer is greater than or equal to 30 μm and less than or equal to 150 μm along the direction perpendicular to the plane of the battery piece.
Optionally, at the position of the connecting line, the thickness of the first adhesive layer is greater than the thickness of the second adhesive layer along the direction perpendicular to the plane of the battery piece.
Optionally, the length of the battery piece is greater than or equal to 180mm and less than or equal to 240mm.
Optionally, the battery piece comprises a battery piece without a main grid.
Optionally, the projection of the first adhesive layer along the direction perpendicular to the plane of the battery piece falls into the battery piece.
Optionally, the first adhesive layer is a sheet structure, and the first adhesive layer covers the plurality of connecting lines.
Optionally, the first adhesive layer is a strip structure, the first adhesive layer includes a plurality of strips, and a plurality of strips are arranged on the surface of the battery piece at intervals.
Optionally, the plurality of strips are arranged on the surface of the battery piece at intervals along the extending direction perpendicular to the connecting line; each of the strips covers a portion of the plurality of connection lines.
Optionally, each of the strips covers one of the connection lines.
Optionally, a plurality of strips are arranged on the surface of the battery piece at intervals along the extending direction of the connecting lines, and each strip covers the plurality of connecting lines.
Optionally, the first adhesive layer includes at least one transparent conductive layer, and the transparent conductive layer directly covers the connecting wire at least partially.
Optionally, the transparent conductive layer includes at least one of a polyaniline layer, a metal nano layer, and a graphene layer.
Optionally, the transparent conductive layer includes at least one of an acrylate resin layer, an epoxy acrylate resin layer, and an epoxy acrylate oligomer layer.
The application discloses a photovoltaic module, comprising: a battery sheet; the plurality of connecting wires are arranged on the surface of the battery piece at intervals; the first adhesive layer is arranged on one side, far away from the battery piece, of the plurality of connecting wires, and is used for fixing the plurality of connecting wires on the surface of the battery piece; the thickness of the first adhesive layer is T along the direction perpendicular to the plane of the battery piece 1 The height of the connecting line is T 2 Wherein T is 1 And T is 2 Is greater than or equal to 0.3 and less than or equal to 1.8.
According to the photovoltaic module disclosed by the application, the plurality of connecting wires are fixed on the surface of the battery piece through the first adhesive layer. Compared with the mode of welding the connecting wire on the surface of the battery piece in a spot welding mode, the mode of fixing the connecting wire on the surface of the battery piece through the first adhesive layer is higher in efficiency and lower in cost.
Further, in the embodiment of the present application, the thickness T of the first adhesive layer is set along the direction perpendicular to the plane of the battery piece 1 Height T of connecting line 2 Is set to be greater than or equal to 0.3 and less than or equal to 1.8. So that be fixed in the in-process on battery piece surface with the connecting wire through first glue film, the connecting wire is difficult for the skew to the setting of first glue film can not lead to the battery piece to appear hidden reliability problems such as splitting.
Drawings
Fig. 1 shows a schematic structural diagram of a photovoltaic module according to an embodiment of the present application;
fig. 2 shows a second schematic structural diagram of the photovoltaic module according to the embodiment of the present application;
fig. 3 shows a schematic structural diagram of a photovoltaic module according to an embodiment of the present application;
fig. 4 shows a cross-sectional view of the photovoltaic module at the connection line, in a direction perpendicular to the plane of the cell.
Reference numerals:
10: a battery sheet;
20: a connecting wire; 21: a connecting wire matrix; 22: a bonding layer;
30: a first adhesive layer;
40: a second adhesive layer;
50: a cover plate;
60: a back plate.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the application, are intended to be within the scope of the application.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Referring to fig. 1, a schematic structural diagram of a photovoltaic module according to an embodiment of the present application is shown; referring to fig. 2, a second schematic structural diagram of the photovoltaic module according to the embodiment of the present application is shown; referring to fig. 3, a schematic structural diagram of a photovoltaic module according to an embodiment of the present application is shown; referring to fig. 4, a cross-sectional view of the photovoltaic module is shown at the connection line, along a direction perpendicular to the plane of the cell.
As shown in fig. 1 to 4, an embodiment of the present application discloses a photovoltaic module, which includes: a battery sheet 10; the plurality of connecting wires 20 are arranged on the surface of the battery piece 10 at intervals; the first adhesive layer 30, the first adhesive layer 30 is disposed at one side of the plurality of connection lines 20 away from the battery piece 10, and the first adhesive layer 30 is used for fixing the plurality of connection lines 20 Is fixed on the surface of the battery piece 10; the thickness of the first adhesive layer 30 is T along the direction perpendicular to the plane of the battery piece 10 1 The height of the connecting line 20 is T 2 Wherein T is 1 And T is 2 Is greater than or equal to 0.3 and less than or equal to 1.8.
The embodiment of the application discloses a photovoltaic module, which comprises a plurality of battery pieces 10, wherein the battery pieces 10 are generally arranged at intervals. The battery sheet 10 may absorb solar energy and convert the solar energy into electric energy. The photovoltaic module further comprises a plurality of connecting wires 20, wherein the connecting wires 20 generally comprise a plurality of connecting wires 20, one ends of the plurality of connecting wires 20 are arranged on the surface of one cell 10 at intervals, and the other ends of the plurality of connecting wires are arranged on the surface of the adjacent other cell 10 at intervals.
It should be noted that the connection line 20 in the embodiment of the present application has conductivity. Specifically, the connection line 20 may be a solder ribbon, or any other connection line that may electrically connect two adjacent battery pieces 10. Here, the specific type of the connection line 20 is not limited, and in actual use, a skilled person may select as needed.
As shown in fig. 1 to 4, the first adhesive layer 30 is disposed on a side of the plurality of connection lines 20 away from the battery sheet 10, so that the plurality of connection lines 20 are fixed by the first adhesive layer 30, and the plurality of connection lines 20 are fixed to the surface of the battery sheet 10.
In the processing process of the photovoltaic module, the plurality of connecting wires 20 can be arranged on the surface of the battery piece 10 at intervals, and then the first adhesive layer 30 is arranged on one side, far away from the battery piece 10, of the connecting wires 20. The first adhesive layer 30 is thermally cured or photo-cured such that the first adhesive layer 30 fixes the connection lines 20 to the surface of the battery cell 10. At this time, the photovoltaic module is not laminated, and the connection line 20 is mainly in physical contact with the battery sheet 10, and the position of electrical contact is small. After the lamination operation is performed on the photovoltaic module, the connection wires 20 may be electrically connected to the surface of the battery sheet 10. As shown in fig. 4, the thickness of the first adhesive layer 30 of the laminated photovoltaic module is T in the direction perpendicular to the plane of the battery sheet 10 1 The height of the connecting line 20 is T 2 . Wherein T is 1 And T is 2 Is greater than or equal to 0.3 and less than or equal to 1.8.
It should be noted that the connection wire 20 in the embodiment of the present application generally includes a connection wire substrate 21 and a bonding layer 22 attached to the connection wire substrate 21. The height of the connection line 20 refers to the sum of the height of the connection line base 21 and the height of the bonding layer 22.
Table 1 shows the reliability of the laminated photovoltaic module and the power condition of the photovoltaic module in the case where the first adhesive layers 30 of different thicknesses and the connection lines 20 of different heights are provided in the plurality of photovoltaic modules in the direction perpendicular to the plane in which the battery sheet 10 is located.
Table 1 reliability of photovoltaic module and power of photovoltaic module in case the photovoltaic module has first adhesive layers of different thicknesses and connection lines of different heights
| Sequence number | First adhesive layer thickness T 1 | Height T of connecting wire 2 | T 1 /T 2 | Laminate reliability | Component power |
| Assembly I | 0.05mm | 0.25mm | 0.2 | × | / |
| Component II | 0.1mm | 0.25mm | 0.4 | √ | 589.36 |
| Component III | 0.3mm | 0.25mm | 1.2 | √ | 589.25 |
| Component IV | 0.35mm | 0.25mm | 1.4 | √ | 589.00 |
| Component five | 0.05mm | 0.2mm | 0.25 | √ | 588.51 |
| Component six | 0.35mm | 0.2mm | 1.75 | √ | 584.97 |
| Component seven | 0.4mm | 0.2mm | 2 | × | / |
| Component eight | 0.05mm | 0.3mm | 0.17 | × | / |
| Component nine | 0.1mm | 0.3mm | 0.33 | √ | 584.97 |
| Component ten | 0.4mm | 0.3mm | 1.33 | √ | 590.02 |
As can be seen from table 1, in the embodiment of the present application, the thickness T of the first adhesive layer 30 can be set in the direction perpendicular to the plane of the battery plate 10 1 Height T of the connecting line 20 2 Is set to 0.3, 0.6, 0.9, 1.2, 1.5, 1.8, etc. At T 1 And T is 2 In the case where the ratio of (2) is greater than or equal to 0.3 and less than or equal to 1.8, the reliability of the photovoltaic module after lamination is high, and the photovoltaic after laminationThe photoelectric conversion efficiency of the assembly is good.
For example, when the thickness T of the first adhesive layer 30 is perpendicular to the plane of the battery plate 10 1 Height T of the connection line 20 is 0.1mm 2 At 0.25mm, T 1 And T is 2 The ratio of (2) was 0.4. At this time, the reliability of the photovoltaic module after lamination is good, the power of the photovoltaic module is 589.36, and the photoelectric conversion efficiency of the photovoltaic module is good.
For another example, when the thickness T of the first adhesive layer 30 is perpendicular to the plane of the battery piece 10 1 Height T of the connection line 20 is 0.3mm 2 At 0.25mm, T 1 And T is 2 The ratio of (2) is 1.2. At this time, the reliability of the photovoltaic module after lamination is good, the power of the photovoltaic module is 589.25, and the photoelectric conversion efficiency of the photovoltaic module is good.
As another example, when the thickness T of the first adhesive layer 30 is perpendicular to the plane of the battery plate 10 1 Height T of the connection line 20 is 0.35mm 2 At 0.25mm, T 1 And T is 2 The ratio of (2) was 1.75. At this time, the reliability of the photovoltaic module after lamination is good, the power of the photovoltaic module is 584.97, and the photoelectric conversion efficiency of the photovoltaic module is good.
As can be seen from table 1, when the thickness T of the first adhesive layer 30 is perpendicular to the plane of the battery plate 10 1 Height T of the connection line 20 is 0.05mm 2 At 0.25mm, T 1 And T is 2 The ratio of (2) is 0.2. In this case, since the height difference of the first adhesive layer 30 at the position of the connection line 20 is large, the connection line 20 is easily displaced, resulting in poor contact between the connection line 20 and the battery cell 10.
In a direction perpendicular to the plane of the battery plate 10, when the thickness T of the first adhesive layer 30 is 1 Height T of the connection line 20 is 0.4mm 2 At 0.2mm, T 1 And T is 2 The ratio of (2). In this case, since the first glue layer 30 is generally a pre-crosslinked polymer adhesive material, its fluidity is poor. Therefore, the first adhesive layer 30 presses the connecting wire 20, and the pressure of the first adhesive layer 30 pressing the connecting wire 20 is high, and the pressure is transmitted to the battery piece 10, so that the reliability of the battery piece 10 such as hidden crack is generated Problems.
The application discloses a photovoltaic module, comprising: a battery sheet 10; the plurality of connecting wires 20 are arranged on the surface of the battery piece 10 at intervals; the first adhesive layer 30, the first adhesive layer 30 is disposed on one side of the plurality of connection lines 20 away from the battery piece 10, and the first adhesive layer 30 is used for fixing the plurality of connection lines 20 on the surface of the battery piece 10; the thickness of the first adhesive layer 30 is T along the direction perpendicular to the plane of the battery piece 10 1 The height of the connecting line 20 is T 2 Wherein T is 1 And T is 2 Is greater than or equal to 0.3 and less than or equal to 1.8. According to the photovoltaic module disclosed by the application, the plurality of connecting wires 20 are fixed on the surface of the battery piece 10 through the first adhesive layer 30. Compared with the mode of welding the connecting wire 20 on the surface of the battery piece 10 by spot welding, the mode of fixing the connecting wire 20 on the surface of the battery piece by the first adhesive layer 30 in the application has higher efficiency and lower cost. Further, in the embodiment of the present application, the thickness T of the first adhesive layer 30 is set along the direction perpendicular to the plane of the battery piece 10 1 Height T of the connecting line 20 2 Is set to be greater than or equal to 0.3 and less than or equal to 1.8. So that the connecting wire 20 is not easy to deviate in the process of fixing the connecting wire 20 on the surface of the battery piece 10 through the first adhesive layer 30, and the arrangement of the first adhesive layer 30 can not cause the reliability problems such as hidden cracks and the like of the battery piece 10.
Preferably T 1 And T is 2 Is greater than or equal to 0.4 and less than or equal to 1.4.
In order to further improve the reliability of the photovoltaic module and the photoelectric conversion efficiency of the photovoltaic module, in the embodiment of the present application, the thickness T of the first adhesive layer 30 is set along the direction perpendicular to the plane of the battery piece 10 1 Height T of the connecting line 20 2 Is set to be greater than or equal to 0.4 and less than or equal to 1.4.
Illustratively, the thickness T of the first adhesive layer 30 may be perpendicular to the plane of the battery sheet 10 1 Height T of the connecting line 20 2 Is set to 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, etc.
Of course, the above ratio is onlyThickness T as first glue layer 30 1 Height T of the connecting line 20 2 Is not a limitation of the present application. In the actual production process, the skilled person can apply the thickness T of the first adhesive layer 30 as required 1 Height T of the connecting line 20 2 Is set to any value between greater than or equal to 0.4 and less than or equal to 1.4.
As an alternative embodiment, T 1 Greater than or equal to 0.1mm and less than or equal to 0.4mm; t (T) 2 Greater than or equal to 0.15mm and less than or equal to 0.35mm.
In the embodiment of the present application, the thickness T of the first adhesive layer 30 is set in the direction perpendicular to the plane of the battery sheet 10 1 Is set to be greater than or equal to 0.1mm and less than or equal to 0.4mm. Illustratively, the thickness T of the first bond line 30 may be 1 Set to 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, etc.
In the embodiment of the present application, the thickness T of the first adhesive layer 30 is set along the direction perpendicular to the plane of the battery piece 10 1 The first adhesive layer 30 is set to be greater than or equal to 0.1mm, so that the first adhesive layer 30 is too thin, and when the first adhesive layer 30 is used for feeding, wrinkles are easy to occur, and therefore the connecting line 20 is offset and the like. Thickness T of the first adhesive layer 30 1 The thickness of the first adhesive layer 30 is set to be smaller than or equal to 0.4mm, so that the problem that the reliability of the battery piece 10 is caused by hidden cracks and the like due to the fact that the pressure of the first adhesive layer 30 extruding the connecting wire 20 is too large and is transmitted to the battery piece 10 is avoided.
In the embodiment of the present application, the height T of the connecting line 20 is set in the direction perpendicular to the plane of the battery plate 10 2 Is set to be greater than or equal to 0.15mm and less than or equal to 0.35mm. The height T of the connection line 20 may be exemplified by 2 Set to 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, etc.
In the embodiment of the present application, the height T of the connecting line 20 is set along the direction perpendicular to the plane of the battery plate 10 2 Is set to be greater than or equal to 0.15mm and less than or equal to 0.35mm. So that the photovoltaic module after laminationThe reliability is higher, and the photoelectric conversion efficiency of the photovoltaic module after lamination is better. Meanwhile, the height difference of the first adhesive layer 30 at the position of the connecting line 20 is proper, and the reliability problems such as the displacement of the connecting line 20 are not easy to occur.
As an alternative embodiment, the first glue layer 30 comprises a layer of pre-crosslinked polymeric adhesive material.
In embodiments of the present application, the first glue layer 30 may be provided as a layer of pre-crosslinked polymeric adhesive material. Specifically, the pre-crosslinked polymer adhesive material layer may include a pre-crosslinked EVA layer, which has advantages of low flowability, low cost, and the like. Wherein EVA is ethylene-vinyl acetate copolymer.
In addition, the pre-crosslinked polymer adhesive material layer can also comprise a pre-crosslinked POE layer, and the pre-crosslinked POE layer has the advantage of good PID resistance effect. Among them, POE is classified into two kinds, one is a high polymer of ethylene and butene, and the other is a high polymer of ethylene and octene.
Of course, the layer of pre-crosslinked polymeric binder material may also include any other layer of pre-crosslinked polymeric binder material. In this regard, the embodiment of the present application is not particularly limited, and in practical use, a technician may select as needed.
As an alternative embodiment, the pre-crosslinked polymeric adhesive material layer has a degree of pre-crosslinking of greater than 40%.
In the embodiment of the present application, the pre-crosslinking degree of the pre-crosslinked polymer adhesive material layer refers to the degree that the polymer molecules in the pre-crosslinked polymer adhesive material layer undergo a crosslinking reaction to solidify the insoluble gel. It is also believed that the linear molecules in the layer of pre-crosslinked polymeric binder material crosslink to a mass ratio of network molecules. It will be appreciated that the higher the degree of pre-crosslinking of the layer of pre-crosslinked polymeric binder material, the greater its adhesion.
In an embodiment of the present application, the pre-crosslinking degree of the pre-crosslinked polymer adhesive material layer is set to be greater than 40%. The layer of pre-crosslinked polymeric adhesive material may more securely fix the connection lines 20 to the surface of the battery sheet 10 during the production of the photovoltaic module.
As an alternative embodiment, the pre-crosslinked polymer adhesive material layer is disposed on a side of the first adhesive layer 30 adjacent to the battery sheet 10, and the pre-crosslinked polymer adhesive material layer is at least partially connected to the battery sheet 10.
In an embodiment of the present application, the pre-crosslinked polymer adhesive material layer may be disposed on one side of the first adhesive layer 30 adjacent to the battery sheet 10, and the pre-crosslinked polymer adhesive material layer may be partially connected to the surface of the battery sheet 10. The first adhesive layer 30 is adhered to the surface of the battery plate 10 through the pre-crosslinked polymer adhesive material layer, so that the adhesion reliability between the first adhesive layer 30 and the battery plate 10 is higher, and the connecting wire 20 is further better fixed to the surface of the battery plate 10.
As an alternative embodiment, the pre-crosslinked polymeric adhesive material layer comprises at least one of an EVA layer, a POE layer, and a PVB layer. The layer of pre-crosslinked polymeric binder material may be, for example, a single layer structure. The layer of pre-crosslinked polymeric adhesive material of the monolayer structure may be a layer of pre-crosslinked EVA. The pre-crosslinked EVA layer has the advantages of low flowability, low cost and the like.
Of course, the pre-crosslinked polymeric adhesive material layer may also be a multi-layer structure, which may include one or more of an EVA layer, a POE layer, and a PVB layer. Illustratively, the layer of pre-crosslinked polymeric adhesive material of the multilayer structure may include an EVA layer and a POE layer, wherein the EVA layer is disposed on a side of the first adhesive layer 30 adjacent to the battery cell 10. The layers of pre-crosslinked polymeric adhesive material of the multilayer structure may include an EVA layer and a PVB layer, wherein the EVA layer is disposed on the side of the first adhesive layer 30 adjacent to the battery cell 10.
As an alternative embodiment, the first adhesive layer 30 may be provided as a single layer structure, and the first adhesive layer 30 of the single layer structure may be provided as an EVA layer.
Of course, the first adhesive layer 30 may be provided in a multi-layered structure. For example, the first adhesive layer 30 may be provided in a double-layer structure, or the first adhesive layer 30 may be provided in a three-layer structure. In this regard, the embodiments of the present application are not limited too much, and in actual use, a technician may set the embodiments as required.
As an alternative embodiment, the first adhesive layer 30 may be a double-layer structure, where the first adhesive layer 30 of the double-layer structure includes an EVA layer and a POE layer, where the EVA layer is disposed on a side of the first adhesive layer 30 near the battery cell 10, and the EVA layer abuts against the battery cell 10.
In the embodiment of the present application, the first adhesive layer 30 is configured as a double-layer structure, and the first adhesive layer 30 of the double-layer structure includes an EVA layer and a POE layer. Wherein, the EVA layer sets up in the one side that first glue film 30 is close to battery piece 10, and the POE layer sets up in the one side that first glue film 30 kept away from battery piece 10.
In the embodiment of the application, the connection line 20 is adhered to the surface of the battery piece 10 through the EVA layer, so as to improve the reliability of connection between the connection line 20 and the battery piece 10. The POE layer has the characteristic of good PID resistance, and the POE layer is arranged on one side, far away from the battery piece 10, of the first adhesive layer 30 so as to improve the PID resistance of the photovoltaic module.
It should be noted that, in the embodiment of the present application, the first adhesive layer 30 may be an insulating adhesive layer, and the first adhesive layer 30 may also be a conductive adhesive layer. In the case where the first glue layer 30 is a conductive glue layer, the first glue layer 30 may include at least one transparent conductive layer. The transparent conductive layer directly covers the connection line 20 at least in part and has a portion adhered to the surface of the battery sheet 10. The transparent conductive layer can effectively disperse current and prevent the current concentration in local areas. Further, in the case that the battery piece is a heterojunction battery piece, the transparent conductive layer can be directly contacted with the TCO layer on the surface of the battery piece, namely the transparent oxide conductive layer, so that the purpose of partially collecting current is achieved, and the current collection efficiency is improved.
As one of the alternative embodiments, the base material of the transparent conductive layer is a polymer layer, and the polymer layer may include at least one of an acrylate resin layer, an epoxy acrylate resin layer, and an epoxy acrylate oligomer layer.
Wherein a conductive substance is dispersed in the polymer layer, and the transparent conductive layer may include at least one of a polyaniline layer, a metal nano-layer, and a graphene layer, from the viewpoint of the conductive substance.
In the embodiment of the present application, the specific proportion of the base material and the conductive material in the transparent conductive layer is not limited to any particular extent. In an actual production process, this can be performed with reference to the prior art. Specific reference may be made to: CN102627823B, CN108753147A, CN106279740a and the like are described in the literature and are not described in detail herein.
Illustratively, the first adhesive layer 30 may be provided as a double-layer structure, and the first adhesive layer 30 of the double-layer structure includes two layers of a transparent conductive layer and a supporting layer, which may be an EVA layer or a PET layer, or the like. The transparent conductive layer can effectively disperse current, prevent the current concentration in a local area and can achieve the purpose of partially collecting the current.
As an alternative embodiment, as shown in fig. 4, the connection wire 20 includes a connection wire base 21 and a bonding layer 22 attached to a surface of the connection wire base 21, and the connection wire 20 is electrically connected to the battery cell 10 through the bonding layer 22; the melting point of the bonding layer 22 is less than 165 degrees, and the bonding layer 22 is one of a tin-lead-bismuth layer, a tin-bismuth-silver layer or a tin-indium layer.
As shown in fig. 4, the connection wire 20 includes a connection wire base 21 and a bonding layer 22 attached to a surface of the connection wire base 21. Wherein, the connecting wire matrix 21 and the bonding layer 22 are both provided with conductivity. The connection wire matrix 21 is typically a copper strip, and the connection wire matrix 21 may be an oxygen-free copper strip, for example. Of course, the connection wire base 21 may be another metal belt, for example, an aluminum belt or the like. In this regard, the present application is not particularly limited, and in actual use, the skilled person may select as required.
The connecting wire 20 in the embodiment of the present application is electrically connected to the battery cell 10 through the bonding layer 22. Wherein the melting point of the bonding layer 22 is less than 165 degrees. The bonding layer 22 may be metallurgically interconnected with the metal grid lines on the surface of the cell 10 during lamination of the photovoltaic module. Thereby electrically connecting the connection lines 20 to the battery cells 10 to collect current generated from the battery cells 10 through the connection lines 20.
Specifically, the bonding layer 22 may be a tin-lead-bismuth layer, a tin-bismuth-silver layer, or a tin-indium layer. Of course, the bonding layer 22 may be another metal layer having a melting point of less than 165 degrees and conductivity, and the present application is not limited thereto, and in practical use, a skilled person may set an appropriate bonding layer 22 according to need.
As an alternative embodiment, the surface of the battery sheet 10 is provided with a transparent oxidized conductive layer to which the bonding layer 22 is partially connected.
In the embodiment of the application, the surface of the battery piece 10 is provided with a transparent oxidation conductive layer, and the current generated by the battery piece 10 is collected through the transparent oxidation conductive layer. Specifically, the transparent conductive oxide layer may be a tin oxide layer, and may be an indium tin oxide layer. In the embodiment of the application, the specific material of the transparent oxide conductive layer is not excessively limited, and can be selected according to the needs in actual use.
Wherein the bonding layer 22 is partially connected to the transparent oxidized conductive layer. That is, the bonding layer 22 directly contacts the transparent oxidized conductive layer and is electrically connected to the transparent oxidized conductive layer. Thereby achieving electrical connection between the connection lines 20 and the battery cells 10 to collect current generated from the battery cells 10 through the connection lines 20.
As an alternative embodiment, the connection wire 20 includes a connection wire base 21, and the connection wire base 21 is electrically connected to the battery cell 10.
The connecting wire 20 in the embodiment of the present application may only include the connecting wire matrix 21, and the connecting wire matrix 21 is fixed on the surface of the battery piece 10 through the first adhesive layer 30, so that the connecting wire matrix 21 is electrically connected to the battery piece 10, and the current generated by the battery piece 10 is collected.
As an alternative embodiment, as shown in fig. 3 and 4, the photovoltaic module further includes: the second adhesive layer 40, the cover plate 50 and the back plate 60, wherein the second adhesive layer 40 is disposed between the cover plate 50 and the first adhesive layer 30, and/or the second adhesive layer 40 is disposed between the back plate 50 and the first adhesive layer 30.
As shown in fig. 3 and 4, the photovoltaic module in the embodiment of the present application further includes a second adhesive layer 40, a cover plate 50, and a back plate 60. The second adhesive layer 40 is disposed between the first adhesive layer 30 and the cover plate 50 to adhere the cover plate 50 to one side of the battery cell 10 through the second adhesive layer 40, and/or the second adhesive layer 40 is disposed between the first adhesive layer 30 and the back plate 50 to adhere the back plate 50 to the other side of the battery cell 10 through the second adhesive layer 40. So that the battery cell 10 can be fixed and protected by the cover plate 50 and the back plate 60.
As an alternative embodiment, the sum of the thickness of the first adhesive layer 30 and the thickness of the second adhesive layer 40 is greater than or equal to 0.4mm and less than or equal to 0.8mm in a direction perpendicular to the plane in which the battery sheet 10 lies.
In the embodiment of the present application, the sum of the thickness of the first adhesive layer 30 and the thickness of the second adhesive layer 40 is set to be greater than or equal to 0.4mm and less than or equal to 0.8mm in the direction perpendicular to the plane in which the battery sheet 10 is located. The production cost of the photovoltaic module is controlled while the reliability of the photovoltaic module is guaranteed.
If the sum of the thickness of the first adhesive layer 30 and the thickness of the second adhesive layer 40 is set to be less than 0.4mm along the direction perpendicular to the plane of the battery piece 10, quality problems such as hidden cracks and the like of the laminated battery piece easily occur, and the reliability of the photovoltaic module is affected. If the sum of the thickness of the first adhesive layer 30 and the thickness of the second adhesive layer 40 is set to be greater than 0.8mm along the direction perpendicular to the plane of the battery piece 10, the cost of the photovoltaic module is high, and quality problems such as glue overflow and battery piece offset easily occur in the photovoltaic module.
Further, both the first glue layer 30 and the second glue layer 40 may be regarded as sealing layers. Because the flowability of the first adhesive layer 30 is poor, the thickness of the first adhesive layer 30 is not easy to be excessively large, and generally, the ratio of the thickness of the first adhesive layer 30 to the sum of the thicknesses of the first adhesive layer 30 and the second adhesive layer 40 is 10% -45%.
Under the condition that the ratio of the thickness of the first adhesive layer 30 to the sum of the thicknesses of the first adhesive layer 30 and the second adhesive layer 40 is lower than 10%, the first adhesive layer 30 is too thin, wrinkles easily occur in the process of feeding the first adhesive layer 30, and when the photovoltaic module is laminated, the first adhesive layer 30 is easily broken at the position of the connecting line 20, so that the connecting line 20 is displaced. Under the condition that the thickness of the first adhesive layer 30 accounts for more than 45% of the sum of the thicknesses of the first adhesive layer 30 and the second adhesive layer 40, the thickness of the first adhesive layer 30 is overlarge, the pressure generated by the gravity of the first adhesive layer 30 on the connecting wire 20 is large due to poor flowability of the first adhesive layer 30, the cell 10 is prone to hidden cracking, and the poor flowability of the first adhesive layer 30 also causes insufficient tightness of the photovoltaic module, so that the reliability of final packaging of the photovoltaic module is affected.
As an alternative embodiment, as shown in fig. 4, the thickness of the first adhesive layer 30 is greater than or equal to 80 μm and less than or equal to 180 μm, and the thickness of the second adhesive layer 40 is greater than or equal to 30 μm and less than or equal to 150 μm in a direction perpendicular to the plane of the battery sheet 10 at the position where the connection line 20 is located.
As shown in fig. 4, the first and second adhesive layers 30 and 40 at the positions where the connection lines 20 are located are pressed during lamination of the photovoltaic module. Therefore, the thickness of the first adhesive layer 30 and the thickness of the second adhesive layer 40 at the position where the connection line 20 is located are smaller.
After lamination of the photovoltaic module, the thickness of the first adhesive layer 30 is typically greater than or equal to 80 μm and less than or equal to 180 μm in a direction perpendicular to the plane of the battery sheet 10 at the location of the connection line 20. Specifically, at the position of the connection line 20, the thickness of the first adhesive layer 30 may be set to 80 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, etc. in a direction perpendicular to the plane in which the battery sheet 10 is located.
After lamination of the photovoltaic module, the thickness of the second adhesive layer 40 is typically greater than or equal to 30 μm and less than or equal to 150 μm in a direction perpendicular to the plane of the battery sheet 10 at the location of the connection line 20. Specifically, at the position of the connection line 20, the thickness of the second adhesive layer 40 may be set to 30 μm, 60 μm, 90 μm, 120 μm, 150 μm, etc. in a direction perpendicular to the plane in which the battery sheet 10 is located.
As an alternative embodiment, the thickness of the first adhesive layer 30 is greater than the thickness of the second adhesive layer 40 in a direction perpendicular to the plane of the battery sheet 10 at the location of the connection line 20.
Before lamination of the photovoltaic modules, the thickness of the second adhesive layer 40 is generally greater than the thickness of the first adhesive layer 30 in the direction perpendicular to the plane of the cell sheet 10 at the location of the connection line 20. After the photovoltaic modules are laminated, the thickness of the first adhesive layer 30 is greater than the thickness of the second adhesive layer 40 along the direction perpendicular to the plane of the battery piece 10 at the position of the connecting line 20.
This is mainly due to the fact that the first glue layer 30 is typically a layer of pre-crosslinked polymeric adhesive material, which has a lower flowability than the second glue layer 40. During lamination, the first glue layer 30 and the second glue layer 40 are pressed and flowed, and the first glue layer 30 has poor fluidity, so that the thickness variation of the first glue layer 30 is smaller than that of the second glue layer 40.
As an alternative embodiment, the length of the battery sheet 10 is greater than or equal to 180mm and less than or equal to 240mm.
The length of the battery sheet 10 in the embodiment of the application is greater than or equal to 180mm and less than or equal to 240mm. Specifically, the battery sheet 10 may have a length of 180mm, 182mm, 191.6mm, 191.75mm, 192, 210mm, 220mm, 230mm, 240mm, and the like.
Illustratively, the battery cell 10 may be a rectangular structure, and specific dimensions of the battery cell 10 of the rectangular structure may include: (182+ -2) mm (96+ -1) mm, (192+ -2) mm (91+ -1) mm, (182+ -2) mm (105+ -1) mm, and the like.
Of course, in the embodiment of the present application, the specific structure and specific size of the battery piece 10 are not limited, and any structure and any size of the battery piece 10 are all within the protection scope of the present application. In actual use, a skilled person may select an appropriate battery sheet as the battery sheet 10 as required.
The battery piece 10 in the embodiment of the application may be a battery piece without a main grid, or may be a battery piece with a main grid. In actual use, the skilled person may choose as desired.
The first adhesive layer 30 in the embodiment of the present application falls into the battery piece 10 along the projection perpendicular to the plane direction of the battery piece 10. To fix the connection lines 20 to the surface of the battery cell 10 through the first adhesive layer 30. The first adhesive layer 30 is prevented from being too large, so that the adverse problems such as adhesive overflow and the like occur in the lamination process of the photovoltaic module.
In this embodiment of the present application, the first adhesive layer 30 may be configured as a sheet structure, so that the plurality of connection lines 20 disposed on the surface of the battery sheet 10 are covered by the first adhesive layer 30 with one sheet structure, so that the plurality of connection lines 20 are fixed on the surface of the battery sheet 10 through one first adhesive layer 30.
Of course, the first adhesive layer 30 may be configured as a strip structure, where the first adhesive layer 30 includes a plurality of strips, and the plurality of strips are arranged on the surface of the battery sheet 10 at intervals.
Specifically, a plurality of strips may be arranged at intervals on the surface of the battery sheet 10 in the extending direction perpendicular to the connecting lines 20. That is, the extending direction of the plurality of strips is the same as the extending direction of the plurality of connecting lines 20. Wherein each strip may cover a portion of the plurality of connection lines 20. For example, each strip may cover 3 connection lines. For another example, each strip may cover 2 connection lines. Of course, each strip may cover only one connecting line 20.
In the embodiment of the present application, the number of the specific covering connection lines 20 for each strip is not excessively limited, and a technician may set the number as required in an actual production process.
In the embodiment of the present application, a plurality of strips may be arranged at intervals along the extending direction of the connection lines 20, so that each strip covers the plurality of connection lines 20, thereby fixing the plurality of connection lines 20 to the surface of the battery sheet 10.
The application discloses a photovoltaic module, comprising: a battery sheet; the plurality of connecting wires are arranged on the surface of the battery piece at intervals; the first adhesive layer is arranged on one side, far away from the battery piece, of the plurality of connecting wires, and is used for fixing the plurality of connecting wires on the surface of the battery piece; the thickness of the first adhesive layer is T along the direction perpendicular to the plane of the battery piece 1 The height of the connecting line is T 2 Wherein T is 1 And T is 2 Is greater than or equal toEqual to 0.3 and less than or equal to 1.8.
According to the photovoltaic module disclosed by the application, the plurality of connecting wires are fixed on the surface of the battery piece through the first adhesive layer. Compared with the mode of welding the connecting wire on the surface of the battery piece in a spot welding mode, the mode of fixing the connecting wire on the surface of the battery piece through the first adhesive layer is higher in efficiency and lower in cost.
Further, in the embodiment of the present application, the thickness T of the first adhesive layer is set along the direction perpendicular to the plane of the battery piece 1 Height T of connecting line 2 Is set to be greater than or equal to 0.3 and less than or equal to 1.8. So that be fixed in the in-process on battery piece surface with the connecting wire through first glue film, the connecting wire is difficult for the skew to the setting of first glue film can not lead to the battery piece to appear hidden reliability problems such as splitting.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
While alternative embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the embodiments of the application.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude that an additional identical element is present in an article or terminal device comprising the element.
While the foregoing has been described in some detail by way of illustration of the principles and embodiments of the invention, and while in accordance with the principles and implementations of the invention, those skilled in the art will readily recognize that the invention is not limited thereto.
Claims (29)
1. A photovoltaic module, comprising:
a battery sheet;
the plurality of connecting wires are arranged on the surface of the battery piece at intervals;
the first adhesive layer is arranged on one side, far away from the battery piece, of the plurality of connecting wires, and is used for fixing the plurality of connecting wires on the surface of the battery piece;
the thickness of the first adhesive layer is T along the direction perpendicular to the plane of the battery piece 1 The height of the connecting line is T 2 Wherein T is 1 And T is 2 Is greater than or equal to 0.3 and less than or equal to 1.8.
2. The photovoltaic module of claim 1, wherein T 1 And T is 2 Is greater than or equal to 0.4 and less than or equal to 1.4.
3. The photovoltaic module of claim 1, wherein T 1 Greater than or equal to 0.1mm and less than or equal to 0.4mm;
T 2 greater than or equal to 0.15mm and less than or equal to 0.35mm.
4. The photovoltaic module of claim 1, wherein the first glue layer comprises a layer of pre-crosslinked polymeric adhesive material.
5. The photovoltaic module of claim 4, wherein the pre-crosslinked polymeric binder material layer has a pre-crosslinking degree of greater than 40%.
6. The photovoltaic module of claim 4, wherein the layer of pre-crosslinked polymeric adhesive material is disposed on a side of the first adhesive layer adjacent to the cell sheet,
and the layer of pre-crosslinked polymeric adhesive material is at least partially attached to the battery sheet.
7. The photovoltaic module of claim 4, wherein the pre-crosslinked polymer adhesive material layer comprises at least one of an EVA layer, a POE layer, and a PVB layer.
8. The photovoltaic module of any of claims 1-7, wherein the first glue layer is a single layer structure that is an EVA layer.
9. The photovoltaic module of any of claims 1-7, wherein the first glue layer is a multilayer structure.
10. The photovoltaic module of claim 9, wherein the first adhesive layer is a bilayer structure comprising an EVA layer and a POE layer, wherein,
the EVA layer is arranged on one side, close to the battery piece, of the first adhesive layer, and the EVA layer is abutted to the battery piece.
11. The photovoltaic module of claim 1, wherein the connection wire comprises a connection wire substrate and a bonding layer attached to a surface of the connection wire substrate, the connection wire being electrically connected to the cell sheet through the bonding layer;
the melting point of the bonding layer is less than 165 degrees, and the bonding layer is one of a tin-lead-bismuth layer, a tin-bismuth-silver layer or a tin-indium layer.
12. The photovoltaic module of claim 11, wherein a surface of the cell is provided with a transparent oxidized conductive layer, and the bonding layer is partially connected to the transparent oxidized conductive layer.
13. The photovoltaic assembly of claim 1, wherein the connection wire comprises a connection wire base electrically connected to the cell.
14. The photovoltaic module of claim 1, further comprising: the second adhesive layer, the cover plate and the back plate, wherein,
The second adhesive layer is arranged between the cover plate and the first adhesive layer, and/or the second adhesive layer is arranged between the back plate and the first adhesive layer.
15. The photovoltaic module of claim 14, wherein a sum of a thickness of the first adhesive layer and a thickness of the second adhesive layer is greater than or equal to 0.4mm and less than or equal to 0.8mm in a direction perpendicular to a plane in which the cell sheet lies.
16. The photovoltaic module of claim 15, wherein a ratio of a thickness of the first glue layer to a sum of thicknesses of the first glue layer and the second glue layer ranges from 10% to 45%.
17. The photovoltaic module of claim 14, wherein the thickness of the first adhesive layer is greater than or equal to 80 μm and less than or equal to 180 μm and the thickness of the second adhesive layer is greater than or equal to 30 μm and less than or equal to 150 μm at the location of the connection line in a direction perpendicular to the plane in which the cell sheet is located.
18. The photovoltaic module of claim 17, wherein the thickness of the first glue layer is greater than the thickness of the second glue layer in a direction perpendicular to the plane of the cell at the location of the connection line.
19. The photovoltaic assembly of claim 1, wherein the length of the cell is greater than or equal to 180mm and less than or equal to 240mm.
20. The photovoltaic assembly of claim 1, wherein the cells comprise cells without a primary grid.
21. The photovoltaic module of claim 1, wherein a projection of the first glue layer along a direction perpendicular to a plane in which the cell sheet lies falls into the cell sheet.
22. The photovoltaic module of claim 1, wherein the first glue layer is a sheet-like structure, the first glue layer covering the plurality of connection lines.
23. The photovoltaic module of claim 1, wherein the first adhesive layer is a strip structure, the first adhesive layer comprises a plurality of strips, and the plurality of strips are arranged on the surface of the cell at intervals.
24. The photovoltaic module of claim 23, wherein the plurality of strips are arranged on the surface of the cell at intervals along the extending direction perpendicular to the connecting line;
each of the strips covers a portion of the plurality of connection lines.
25. The photovoltaic module of claim 24, wherein each of the ribbons covers one of the tie lines.
26. The photovoltaic module of claim 23, wherein a plurality of the strips are arranged on the surface of the cell sheet at intervals along the extending direction of the connecting lines, and each of the strips covers the plurality of connecting lines.
27. The photovoltaic module of claim 1, wherein the first glue layer comprises at least one transparent conductive layer that at least partially directly encapsulates the connection lines.
28. The photovoltaic module of claim 27, wherein the transparent conductive layer comprises at least one of a polyaniline layer, a metal nanolayer, and a graphene layer.
29. The photovoltaic module of claim 27, wherein the transparent conductive layer comprises at least one of an acrylate resin layer, an epoxy acrylate oligomer layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311181822.XA CN117199160A (en) | 2023-09-13 | 2023-09-13 | Photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311181822.XA CN117199160A (en) | 2023-09-13 | 2023-09-13 | Photovoltaic module |
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| CN117199160A true CN117199160A (en) | 2023-12-08 |
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| CN202311181822.XA Pending CN117199160A (en) | 2023-09-13 | 2023-09-13 | Photovoltaic module |
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