CN209785955U - Back plate of solar cell module - Google Patents
Back plate of solar cell module Download PDFInfo
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- CN209785955U CN209785955U CN201920040216.9U CN201920040216U CN209785955U CN 209785955 U CN209785955 U CN 209785955U CN 201920040216 U CN201920040216 U CN 201920040216U CN 209785955 U CN209785955 U CN 209785955U
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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
- Y02E10/52—PV systems with concentrators
Abstract
The utility model discloses a solar module's backplate. The back plate comprises a substrate and a fluorine-containing pattern layer which is arranged on the inner side surface of the substrate and has a preset pattern, wherein the inner side surface of the substrate does not contain fluorine. The utility model provides a backplate sets up fluorine-containing pattern layer through the inboard surface at the basement, guarantees on the one hand that the inboard of backplate has good weatherability, and on the other hand makes the backplate have lower cost.
Description
Technical Field
the utility model belongs to the technical field of solar cell, concretely relates to solar module's backplate.
Background
At present, the basic structure of a crystalline silicon solar cell module sequentially comprises front glass, an upper layer packaging material, a cell sheet layer, a lower layer packaging material and a back plate or back glass, wherein the commonly used back plate is a white polymer composite layer. The polymer composite layer consists of an outer layer, a middle layer and an inner layer, wherein bonding materials are arranged between the outer layer and the middle layer and between the middle layer and the inner layer. In the market, solar cell back sheets are mainly classified into fluorine-containing back sheets and fluorine-free back sheets. The fluorine-containing back plate comprises two types, namely double-sided fluorine-containing (such as TPT, KPK and KPF, wherein the first letter represents an outer layer, the middle letter represents a middle layer, and the last letter represents an inner layer) and single-sided fluorine-containing (such as TPE, KPE and KPO, wherein the first letter represents the outer layer, the middle letter represents the middle layer, and the last letter represents the inner layer), wherein T refers to a polyvinyl fluoride (PVF) film, K refers to a polyvinylidene fluoride (PVDF) film, and F refers to a fluorine coating resin coating; p refers to biaxially oriented polyethylene terephthalate film (BOPET); e denotes a polyethylene film or Ethylene Vinyl Acetate (EVA) resin, and O is a polyolefin resin. The back sheet without fluorine is mostly formed by gluing and compounding multiple layers of PET or PA by using an adhesive.
For the double-sided fluorine-containing back plate, the inner layer is integrally compounded with a layer of fluorine-containing film or fluorine-containing coating, so the cost is high.
The weather resistance of the inside of the backsheet is inferior to that of the backsheet containing no fluorine and the backsheet containing no fluorine in the inner layer.
SUMMERY OF THE UTILITY MODEL
an object of the utility model is to provide a solar module's backplate, the inboard of this backplate has good weatherability on the one hand, and on the other hand has lower cost.
In order to achieve the above object, the present invention provides the following technical solutions.
A back sheet for a solar cell module includes a substrate, and a fluorine-containing pattern layer having a predetermined pattern disposed on an inner side surface of the substrate, the inner side surface of the substrate not containing fluorine.
Optionally, the solar cell module sequentially comprises front glass, an upper layer of packaging material, a cell sheet layer, a lower layer of packaging material and a back plate, and the pattern in the fluorine-containing pattern layer is matched with the pattern of the non-shielded region of the cell sheet in the cell sheet layer.
Optionally, the pattern in the fluorine-containing pattern layer is in a grid shape or a strip shape.
Optionally, the fluorine-containing pattern layer is a fluorine-containing thin film having the preset pattern. The fluorine-containing film may be any commercially available fluorine-containing film, and more preferably any of various fluorine-containing films used for a back sheet, such as a polyvinyl fluoride (PVF) film, a polyvinylidene fluoride (PVDF) film, and the like.
Optionally, the fluorine-containing pattern layer (i.e. the fluorine-containing thin film described above) is provided on the inner surface of the substrate via an adhesive layer.
The utility model discloses in, the tie coat can be in the same place with the fluorine-containing film is compound, directly pastes fluorine-containing film on the inboard surface of base member through the tie coat during the use. The adhesive layer may not be combined with the fluorine-containing film, and when the fluorine-containing film is used, the adhesive layer is firstly arranged on the inner surface of the substrate, and then the fluorine-containing film is adhered to the adhesive layer.
The adhesive layer has the same pattern as the fluorine-containing thin film.
Optionally, the fluorine-containing pattern layer is formed by curing a fluorine-containing coating having the preset pattern disposed on the inner side surface of the substrate.
The fluorine-containing coating can be a thermal curing fluorine-containing coating or a photo-curing fluorine-containing coating, and preferably a low-temperature curing fluorine-containing coating and an ultraviolet curing fluorine-containing coating. When preparing the fluorine-containing pattern layer, the fluorine-containing coating is arranged on the inner side surface of the substrate according to the pattern of the fluorine-containing pattern layer, and the fluorine-containing coating is cured to form the fluorine-containing pattern layer.
The utility model discloses in, modes such as spraying, coating, printing can be adopted and fluorine-containing paint is set up on the inboard surface of basement.
The fluorine-containing coating is preferably a transparent or white coating containing fluorine so that the inner layer has better weather resistance at the gaps of the cell sheet.
The fluorine-containing paint can be selected from conventional commercially available fluorine-containing paints, and further preferably fluorine-containing paints used on the back sheet, such as weather-resistant fluorine-containing paint disclosed in patent CN107759983A, ultraviolet-curing weather-resistant fluorine-containing paint disclosed in patent CN 103773217B, and the like.
Optionally, the substrate comprises an outer layer comprising fluorine and a non-fluorine-containing intermediate layer disposed on the outer layer, the pattern layer being disposed on the intermediate layer; and a bonding layer is arranged between the outer layer and the middle layer.
Optionally, the substrate comprises an outer layer comprising fluorine, an intermediate layer comprising no fluorine disposed on the outer layer, and an inner layer comprising no fluorine disposed on the intermediate layer, the intermediate layer and the inner layer being formed of different materials, the pattern layer being disposed on the inner layer; and bonding layers are arranged between the outer layer and the middle layer and between the middle layer and the inner layer.
Optionally, the substrate is formed by compounding multiple layers of fluorine-free polymer material layers.
Technical effects
The utility model discloses following beneficial effect has:
(1) The utility model provides a solar module's backplate sets up fluorine-containing pattern layer on the inboard surface of basement, on the one hand with current inlayer for the backplate that does not contain fluorine material compare, make the inboard of backplate have good weatherability, especially strengthen the weatherability of the backplate inlayer that is located the corresponding position of battery piece non-shielding region in solar module's battery piece group, reduce the yellow stain, increase the space reflectivity, realize the maximize of light energy utilization and subassembly power; on the other hand, the cost of the back sheet is lower than that of the back sheet with the conventional inner layer made of the fluorine-containing material (the weather resistance of the fluorine-containing material of the part of the back sheet with the conventional inner layer made of the fluorine-containing material, which is shielded by the battery piece, does not play a role).
(2) The utility model discloses in the selection of the material about fluorine-containing pattern layer, can be the fluorine-containing film that has preset pattern, also can be the fluorine-containing coating that directly adopts modes such as spraying, coating or printing to set up, through the fluorine-containing pattern layer that low temperature curing or ultraviolet curing made, preparation method is various, realizes easily.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a top view of a back sheet of a solar photovoltaic module in examples 1 and 3;
fig. 2 is a top view of the back sheet of the solar photovoltaic module in examples 2 and 4;
Fig. 3 is a schematic structural view of the solar photovoltaic module in examples 1 and 3;
Fig. 4 is a schematic structural view of the solar photovoltaic module in examples 2 and 4;
Fig. 5 is a schematic structural view of a back plate of a solar photovoltaic module in example 1;
Fig. 6 is a schematic structural view of a back plate of a solar photovoltaic module in example 2;
Fig. 7 is a schematic structural view of a cell sheet and a non-shielding region of the cell sheet in a cell sheet set of a solar photovoltaic module in example 1 and example 3;
Fig. 8 is a schematic structural view of a cell sheet and a non-blocking area of the cell sheet in a cell sheet set of a solar photovoltaic module in embodiment 2 and embodiment 4;
The reference numerals in the drawings denote:
1 is an outer layer;
2 is an intermediate layer;
3 is an inner layer;
31 is a fluorine-containing pattern layer;
4 is a bonding layer;
5 is front glass;
6 is an upper layer packaging material;
7 is a battery sheet layer;
8 is a lower layer packaging material;
9 is a back plate;
10 is a cell in the cell layer;
And 11 is the non-shielded area of the cell in the cell layer.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail.
in the utility model, the inner side of the back plate refers to the side of the back plate facing the battery piece after the back plate is installed in the solar battery component; it is understood that the side of the back plate away from the battery piece is the outer side of the back plate.
fig. 1 shows a structure of a back sheet of a solar cell module, as shown in fig. 1, the back sheet includes a substrate, and a fluorine-containing pattern layer 31 having a predetermined pattern disposed on an inner side surface of the substrate, the inner side surface of the substrate being free of fluorine.
as described above, the conventional back sheet having an inner layer made of a fluorine-free material has poor weather resistance on the inner side, while the conventional back sheet having an inner layer made of a fluorine-containing material has high cost although having good weather resistance, and the weather resistance of the fluorine-containing material does not play a role in the portion of the back sheet having an inner layer made of a fluorine-containing material which is blocked by the battery sheet. Based on this, the utility model provides an in solar module's backplate, set up fluorine-containing pattern layer on the inboard surface of basement, set up the fluorine-containing material layer promptly on the local area of the inboard surface of basement, also the fluorine-containing material layer does not cover whole basement inboard surface promptly to guarantee on the one hand that the inboard of backplate has good weatherability, on the other hand makes the backplate have lower cost.
Fig. 3 and 4 respectively show the structure of a solar cell module, which comprises a front glass 5, an upper layer of an encapsulating material 6, a cell sheet layer 7, a lower layer of an encapsulating material 8, and a back sheet 9 in this order, as shown in fig. 3 and 4.
The utility model relates to a pattern in the pattern layer 31 of fluoric and the pattern looks adaptation of not sheltering from region 11 of the battery piece 10 among the battery piece layer 7, set up fluoric pattern layer 31 on the inboard surface of backplate that does not shelter from region 11 corresponding position department at the battery piece 10 among the battery piece layer with solar module's backplate 9 promptly, so both can save fluorine-containing material, can keep the inboard weatherability of backplate again.
As shown in fig. 7, the pattern of the fluorine-containing pattern layer 31 is a mesh pattern, and the back sheet is suitable for a solar cell module in which cells are connected by solder ribbons and a certain gap is formed between the cells.
As shown in fig. 8, the pattern of the fluorine-containing pattern layer 31 is a stripe shape, and the back sheet is suitable for a laminated assembly, that is, adjacent battery cells in a string of battery cells are connected in a laminated manner, there is no gap between adjacent battery cells in the string of battery cells, and there is a gap between two adjacent strings of battery cells.
Of course, in the utility model discloses in, the pattern of fluoric pattern layer 31 is not limited to net or strip, can set up according to the subassembly type, and the pattern corresponds the battery piece in the battery piece layer not sheltered from the region can.
For the disposing manner of the fluorine-containing pattern layer 31 on the back plate substrate, the present invention provides the following possible embodiments.
in one possible implementation, the fluorine-containing pattern layer 31 is a fluorine-containing thin film with a preset pattern, for example, the pattern of the fluorine-containing thin film is matched with the pattern of the non-blocked area 11 of the battery piece 10 in the battery piece layer.
The fluorine-containing film may be any commercially available fluorine-containing film, and more preferably any of various fluorine-containing films used for a back sheet, such as a polyvinyl fluoride (PVF) film, a polyvinylidene fluoride (PVDF) film, and the like.
The fluorine-containing pattern layer 31 (i.e., the fluorine-containing thin film described above) is provided on the inner surface of the substrate via the adhesive layer 4.
The utility model discloses in, tie coat 4 can be in the same place with the fluorine-containing film is compound, directly pastes fluorine-containing film on the inboard surface of base member through tie coat 4 during the use. The adhesive layer 4 may not be laminated with the fluorine-containing film, and when the fluorine-containing film is used, the adhesive layer 4 is provided on the inner surface of the substrate, and then the fluorine-containing film is adhered to the adhesive layer 4.
the adhesive layer 4 for bonding a fluorine-containing film has the same pattern as that of the fluorine-containing film.
In another possible implementation, the fluorine-containing pattern layer 31 is formed by curing a fluorine-containing paint having a predetermined pattern disposed on the inner side surface of the substrate.
The fluorine-containing coating can be a thermal curing fluorine-containing coating or a photo-curing fluorine-containing coating, and preferably a low-temperature curing fluorine-containing coating and an ultraviolet curing fluorine-containing coating. When the fluorine-containing pattern layer is prepared, the fluorine-containing coating is arranged on the inner side surface of the substrate according to the pattern of the fluorine-containing pattern layer (such as the area 11 which is not blocked by the battery piece 10 in the battery piece layer), and the fluorine-containing coating is cured to form the fluorine-containing pattern layer.
the fluorine-containing coating may be disposed on the inside surface of the substrate by spraying, coating, printing, or the like.
The fluorine-containing coating is preferably a transparent or white coating containing fluorine so that the inner layer has better weather resistance at the gaps of the cell sheet.
The fluorine-containing paint can be selected from conventional commercially available fluorine-containing paints, and further preferably fluorine-containing paints used on the back sheet, such as weather-resistant fluorine-containing paint disclosed in patent CN107759983A, ultraviolet-curing weather-resistant fluorine-containing paint disclosed in patent CN 103773217B, and the like.
The low temperature curing is preferably below 60 ℃, and can be selected according to the fluorine-containing coating used, for example, when the weather-resistant fluorine-containing coating disclosed in the patent publication No. CN107759983A is used, the pattern layer 31 containing fluorine with the thickness of 3 microns can be prepared by curing at 60 ℃.
The specific conditions of the ultraviolet curing can also be selected according to the condition of the adopted fluorine-containing coating, for example, when the ultraviolet curing weather-resistant fluorine-containing coating disclosed in patent CN 103773217B is adopted, 365nm ultraviolet light can be adopted to cure for 10-15 s to prepare the fluorine-containing pattern layer 31 with the film thickness of 5-30 μm.
in the present invention, as shown in fig. 1, the substrate may include an outer layer 1 containing fluorine and an intermediate layer 2 containing no fluorine disposed on the outer layer 1, and the pattern layer 31 is disposed on the intermediate layer 2; an adhesive layer 4 is arranged between the outer layer 1 and the intermediate layer 2.
In this embodiment, the inner surface of the substrate is the inner surface of the intermediate layer 2.
The outer layer 1 may be a film made of a fluorine-containing material such as a polyvinyl fluoride (PVF) film or a polyvinylidene fluoride (PVDF) film, and the intermediate layer 2 may be a biaxially oriented polyethylene terephthalate (BOPET), a polyethylene film (PE), or a polyamide film (PA).
when the back plate of the implementation mode is manufactured, the composite film of the outer layer 1 and the middle layer 2 can be manufactured according to the existing double-sided fluorine-containing back plate manufacturing process, and then the fluorine-containing pattern layer 31 is manufactured on the middle layer 2.
As shown in fig. 2, the composition of the substrate may also be: the pattern layer 31 is arranged on the inner layer 3, and comprises an outer layer 1 containing fluorine, an intermediate layer 2 not containing fluorine and arranged on the outer layer 1, and an inner layer 3 not containing fluorine and arranged on the intermediate layer 2, wherein the intermediate layer 2 and the inner layer 3 are made of different materials; an adhesive layer 4 is arranged between the outer layer 1 and the middle layer 2, and between the middle layer 2 and the inner layer 3.
In this embodiment, the inner surface of the inner layer 3 is the inner surface of the substrate.
The outer layer 1 may be a film made of a fluorine-containing material such as a polyvinyl fluoride (PVF) film or a polyvinylidene fluoride (PVDF) film, and the intermediate layer 2 may be a biaxially oriented polyethylene terephthalate (BOPET), a polyethylene film (PE), or a polyamide film (PA). The inner layer 3 may be a fluorine-free material layer such as a polyethylene film, an ethylene-vinyl acetate resin film, or a polyolefin resin film.
When the back sheet of this implementation manner is manufactured, the fluorine-containing pattern layer 31 may be directly manufactured on the inner layer of the existing back sheet (for example, a TPE back sheet, a KPE back sheet, or a KPO back sheet) having a single surface containing fluorine.
in this embodiment, the inner layer 3 may cover the entire intermediate layer 2, or may cover only a part of the intermediate layer 2 to form a predetermined pattern, for example, the inner layer 3 may have the same pattern as the fluorine-containing pattern layer 31.
In addition, the substrate can also be formed by compounding multiple layers of fluorine-free polymer material layers, such as a plurality of PET films or a plurality of PA films. In this embodiment, the fluorine-containing pattern layer 31 is directly provided on the surface of the fluorine-free polymer material layer of the innermost layer.
the utility model discloses in, the material of the tie coat 4 of each position does not have strict limitation, as long as can bond each part of backplate fixedly can. For example, the tie layer formulations disclosed in examples 1 to 5 of CN107759983A may be used.
The structure of the back sheet of a solar cell module according to the present invention will be described below with respect to a patterned layer in which the inner layer is a fluorine-containing thin film or a patterned layer of a fluorine-containing paint.
Example 1
As shown in fig. 1, the back sheet of a solar cell module provided in this embodiment includes an outer layer 1, an intermediate layer 2 disposed on the outer layer 1, and a patterned layer 31 containing fluorine disposed on the intermediate layer 2, wherein an adhesive layer 4 is disposed between the outer layer 1 and the intermediate layer 2.
The outer layer 1 is a polyvinyl fluoride film, the middle layer 2 is a polyethylene terephthalate film, the fluorine-containing pattern layer 31 is a fluorine-containing film with a preset pattern, and the fluorine-containing film is a polyvinyl fluoride (PVF) film.
As shown in fig. 3, the solar cell module sequentially comprises front glass 5, an upper layer of packaging material 6, a cell sheet layer 7, a lower layer of packaging material 8 and a back sheet 9, wherein the cell sheets 10 in the cell sheet layer 7 are connected through solder strips, and gaps are formed among the cell sheets 10. The pattern of the fluorine-containing thin film is matched with the pattern of the non-shielded area 11 of the cell 10 in the cell layer, and is in a grid shape as shown in fig. 7.
as shown in fig. 5, the fluorine-containing thin film is provided on the surface of the intermediate layer 2 via an adhesive layer 4.
In the present embodiment, the adhesive layer 4 for bonding the fluorine-containing thin film and the intermediate layer 2 is provided on the upper surface of the intermediate layer 2, and has a shape corresponding to the shape of the fluorine-containing pattern layer 31, that is, a grid shape as shown in fig. 7.
Example 2
As shown in fig. 2, the back sheet of a solar cell module provided in this embodiment includes an outer layer 1, an intermediate layer 2 disposed on the outer layer 1, an inner layer 3 disposed on the intermediate layer 2, and a fluorine-containing pattern layer 31 disposed on the inner layer 3, wherein bonding layers 4 are disposed between the outer layer 1 and the intermediate layer 2, and between the intermediate layer 2 and the inner layer 3.
in this embodiment, the substrate adopts the present single face fluorine-containing TPE backplate, that is outer layer 1 is a polyvinyl fluoride film, middle layer 2 is a polyethylene terephthalate film, inner layer 3 is a polyethylene film, and inner layer 3 covers all middle layers 2.
The fluorine-containing pattern layer 31 is a fluorine-containing film with a preset pattern, and the fluorine-containing film is a polyvinylidene fluoride (PVDF) film.
As shown in fig. 4, the solar cell module sequentially comprises front glass 5, an upper layer of packaging material 6, a cell sheet layer 7, a lower layer of packaging material 8 and a back plate 9, wherein the cells in the cell sheet layer 7 are connected in a shingled manner, and no gap exists between the cells in the same string of cells; the pattern in the fluorine-containing pattern layer 31 is matched with the pattern of the non-blocked area 11 of the cell 10 in the cell layer, and is in a strip shape as shown in fig. 8.
As shown in fig. 5, the fluorine-containing thin film is provided on the surface of the inner layer 3 through an adhesive layer 4.
In the present embodiment, the adhesive layer 4 for bonding the fluorine-containing film and the inner layer 3 is provided on the lower surface of the fluorine-containing pattern layer 31, that is, the adhesive layer 4 and the fluorine-containing pattern layer 31 are integrally combined, and the shape thereof is adapted to the shape of the fluorine-containing pattern layer 31, that is, the shape thereof is also in a stripe shape as shown in fig. 8.
Example 3
As shown in fig. 1, the back sheet of a solar cell module provided in this embodiment includes an outer layer 1, an intermediate layer 2 disposed on the outer layer 1, and a patterned layer 31 containing fluorine disposed on the intermediate layer 2, wherein an adhesive layer 4 is disposed between the outer layer 1 and the intermediate layer 2.
The outer layer 1 is a polyvinyl fluoride film, the middle layer 2 is a polyethylene terephthalate film, and the fluorine-containing pattern layer 31 is formed by low-temperature curing of a fluorine-containing coating with a preset pattern printed on the middle layer.
The formula of the fluorine-containing coating is as described in patent CN107759983A, and the formula of the weather-resistant layer of the fluorine-containing coating is as follows (mass fraction):
Fluororesin 41088 (changxing chemical) 80%; epoxy resin B4010P (Mitsubishi yang, Japan) 5%; mica powder (Botong chemical Co., Ltd.) 5%; mixed etherified poly (methylol melamine resin) (maja chemical company) 9.99%; ultraviolet absorber 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole (BASF, Germany) 0.006%; light stabilizer bis (1-octyloxy-2, 2,6, 6-tetramethyl-4-piperidyl) sebacate (taiwan permanent photochemical company, china) 0.001%; antioxidant triethylene glycol ether-bis (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate (Pasteur, Germany) 0.003%.
The curing temperature of the fluorine-containing coating is 60 ℃.
As shown in fig. 3, the solar cell module sequentially comprises front glass 5, an upper layer of packaging material 6, a cell sheet layer 7, a lower layer of packaging material 8 and a back sheet 9, wherein the cell sheets 10 in the cell sheet layer 7 are connected through solder strips, and gaps are formed among the cell sheets 10. The pattern of the fluorine-containing pattern layer 31 is matched with the pattern of the non-shielded region 11 of the cell 10 in the cell layer, and is in a grid shape as shown in fig. 7.
example 4
As shown in fig. 2, the back sheet of a solar cell module provided in this embodiment includes an outer layer 1, an intermediate layer 2 disposed on the outer layer 1, an inner layer 3 disposed on the intermediate layer 2, and a fluorine-containing pattern layer 31 disposed on the inner layer 3, wherein bonding layers 4 are disposed between the outer layer 1 and the intermediate layer 2, and between the intermediate layer 2 and the inner layer 3.
In this embodiment, the substrate adopts the present single face fluorine-containing TPE backplate, that is outer layer 1 is a polyvinyl fluoride film, middle layer 2 is a polyethylene terephthalate film, inner layer 3 is a polyethylene film, and inner layer 3 covers all middle layers 2.
The fluorine-containing pattern layer 31 is formed by ultraviolet curing a fluorine-containing paint having a predetermined pattern sprayed on the inner layer 3.
the ultraviolet curing weather-resistant fluorine-containing coating disclosed in CN 103773217B is adopted as the ultraviolet curing fluorine-containing coating, and the preparation method of the ultraviolet curing weather-resistant fluorine-containing coating comprises the following steps:
50g of urethane acrylate was charged into a vessel equipped with a stirrer, followed by stirring, sequentially adding 15g of hexafluorobutyl acrylate, 20g of tripropylene glycol diacrylate, 5g of pentaerythritol triacrylate, 3g of 1-hydroxy-cyclohexylphenyl ketone, 0.4g of BYK331,0.8g of BYK055 and 10g of propylene glycol methyl ether acetic acid solvent, and dispersing at a high speed of 1000r/min for 0.5 hour to obtain the above-mentioned UV-curable weather-resistant fluorine-containing coating material.
And spraying the ultraviolet curing weather-resistant fluorine-containing coating on the non-shielded area of the cell on the inner layer 3, and curing by adopting 365nm ultraviolet light for 10-15 s to obtain the latticed back plate with the thickness of the fluorine-containing coating on the inner side being 15 microns.
As shown in fig. 4, the solar cell module sequentially comprises front glass 5, an upper layer of packaging material 6, a cell sheet layer 7, a lower layer of packaging material 8 and a back plate 9, wherein the cells in the cell sheet layer 7 are connected in a shingled manner, and no gap exists between the cells in the same string of cells; the pattern in the fluorine-containing pattern layer 31 is matched with the pattern of the non-blocked area 11 of the cell 10 in the cell layer, and is in a strip shape as shown in fig. 8.
While the present invention has been described with reference to certain embodiments, it should be understood that the present invention is not limited to the embodiments described herein. Other people's modifications and adjustments according to the invention that are not essential are within the scope of the invention.
Claims (8)
1. A back sheet for a solar cell module, comprising a substrate, and a fluorine-containing pattern layer (31) having a predetermined pattern provided on an inner surface of the substrate, wherein the inner surface of the substrate does not contain fluorine; the solar cell module sequentially comprises front glass (5), an upper layer of packaging material (6), a cell sheet layer (7), a lower layer of packaging material (8) and a back plate (9), wherein patterns in the fluorine-containing pattern layer (31) are matched with patterns of non-shielding areas (11) of the cell sheets (10) in the cell sheet layer (7).
2. The backsheet for a solar cell module according to claim 1, wherein: the pattern in the fluorine-containing pattern layer (31) is in a grid shape or a strip shape.
3. the backsheet for a solar cell module according to claim 1, wherein: the fluorine-containing pattern layer (31) is a fluorine-containing thin film with the preset pattern.
4. The backsheet for a solar cell module according to claim 3, wherein: the fluorine-containing pattern layer (31) is arranged on the inner side surface of the substrate through a bonding layer (4).
5. The backsheet for a solar cell module according to claim 1, wherein: the fluorine-containing pattern layer (31) is formed by curing a fluorine-containing paint having the preset pattern, which is disposed on the inner side surface of the substrate.
6. the backsheet for a solar cell module according to claim 1, wherein said substrate comprises an outer layer (1) containing fluorine and an intermediate layer (2) not containing fluorine provided on said outer layer (1), said pattern layer (31) being provided on said intermediate layer (2); and a bonding layer (4) is arranged between the outer layer (1) and the middle layer (2).
7. The backsheet for a solar cell module according to claim 1, wherein said substrate comprises an outer layer (1) containing fluorine, an intermediate layer (2) not containing fluorine provided on said outer layer (1), and an inner layer not containing fluorine provided on said intermediate layer (2), the materials forming said intermediate layer (2) and said inner layer (3) being different, said pattern layer (31) being provided on said inner layer (3); an adhesive layer (4) is arranged between the outer layer (1) and the middle layer (2) and between the middle layer (2) and the inner layer (3).
8. The backsheet for a solar cell module according to claim 1, wherein the substrate is formed by laminating a plurality of fluorine-free polymer material layers.
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| CN201920040216.9U CN209785955U (en) | 2019-01-10 | 2019-01-10 | Back plate of solar cell module |
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| CN201920040216.9U CN209785955U (en) | 2019-01-10 | 2019-01-10 | Back plate of solar cell module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713071A (en) * | 2019-01-10 | 2019-05-03 | 晶澳（扬州）太阳能科技有限公司 | A kind of backboard of solar cell module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713071A (en) * | 2019-01-10 | 2019-05-03 | 晶澳（扬州）太阳能科技有限公司 | A kind of backboard of solar cell module |
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