CN103022192A - High reflectance solar cell back-plane film, preparation method of high reflectance solar cell back-plane film, and solar cell - Google Patents
High reflectance solar cell back-plane film, preparation method of high reflectance solar cell back-plane film, and solar cell Download PDFInfo
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- CN103022192A CN103022192A CN2012103973174A CN201210397317A CN103022192A CN 103022192 A CN103022192 A CN 103022192A CN 2012103973174 A CN2012103973174 A CN 2012103973174A CN 201210397317 A CN201210397317 A CN 201210397317A CN 103022192 A CN103022192 A CN 103022192A
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Abstract
The invention relates to the technical field of solar cell back-plane films, in particular to a high reflectance solar cell back-plane film, a preparation method of the high reflectance solar cell back-plane film, and a solar cell. In order to solve the defects that the existing solar cell back-plane film is in overheating so that back film becomes yellow and brittle and the service life of a solar component is affected, the invention provides the high reflectance solar cell back-plane film, the preparation method of the high reflectance solar cell back-plane film, and the solar cell. The back-plane film comprises a substrate, wherein blocked layers are arranged on two sides of the substrate and are connected with the substrate through adhering layers; two sides of the blocked layer are respectively provided with hydrolysis resistance layers and high reflectance hydrolysis resistance layers; and the hydrolysis resistance layers and high reflectance hydrolysis resistance layers are connected through adhering layers. The solar cell back-plane has stronger adhesion stress, good barrier property, electrical insulating property and heat resistance, and higher reflectance; by adopting the solar cell back-plane film, the heat absorption capacity of surfaces of the solar back-plane can be effectively reduced; and the preparation method is simple in process and easy to operate.
Description
Technical field
The present invention relates to solar cell backboard membrane technology field, be specifically related to a kind of high reflectance solar cell backboard film and preparation method thereof and a kind of solar cell.
Background technology
As a kind of equipment that solar energy directly is converted to electric energy, solar module receives much concern at aspects such as the service efficiency of natural resources and ecological protections, and has developed multiple solar module.
Solar cell is prepared through lamination by low iron toughened glass, silicon chip, EVA glue and notacoria; because solar cell is directly exposed in the air; be vulnerable to the erosion of steam, sour gas, the gentle ultraviolet ray of height etc.; cause the decay of opto-electronic conversion performance, so the protective effect of solar cell backboard film is particularly important.Traditional solar energy back film is the composite membrane of TPT or KPK three-decker in the market, wherein " T " representative is the Tedlar type polyvinyl fluoride thin film (PVF) that du pont company is produced, that " P " represents is pet film (PET), and that " K " represents is PVDF membrane (PVDF).Because solar cell for a long time under the irradiation of sunlight, very easily causes the notacoria flavescence and breaks, serious meeting affects the insulating properties of notacoria, causes battery to use.Traditional solar cell backboard film reflectivity is 80-85%, a large amount of luminous energy is absorbed by the solar cell backboard film may cause the battery component heating, affect battery life, so the solar cell backboard film of high reflectance (〉=97%) has extremely strong practical value.
Summary of the invention
In use generate heat excessive in order to solve existing solar cell backboard film (can referred to as solar energy back film, backboard membrane), cause the notacoria flavescence and become fragile, thereby affect the defective in solar components life-span, the invention provides a kind of high reflectance solar cell backboard film and preparation method thereof and a kind of solar cell.Solar cell backboard film provided by the invention has stronger cohesive force, good barrier, electrical insulating property and heat resistance, possesses simultaneously higher reflectivity, can effectively reduce the caloric receptivity of solar energy back plate surface, improve the conversion efficiency of battery component, its preparation method technique is simple, easy operating.
The invention provides a kind of high reflectance solar cell backboard film, described backboard membrane comprises base material, described base material both sides are provided with barrier layer, described barrier layer is connected by tack coat with described base material, described barrier layer both sides are respectively arranged with hydrolysis layer and high reflectance hydrolysis layer, and described hydrolysis layer is connected by tack coat with described barrier layer with high reflectance hydrolysis layer; The thickness of described base material is 50-400 μ m, and the thickness of described barrier layer is 5-50 μ m, and the thickness of described hydrolysis layer and high reflectance hydrolysis layer is 5-50 μ m, and the thickness of described tack coat is 1-10 μ m.Described high reflectance hydrolysis layer is added with inorganic particulate, and addition is the 0.5-20%(percentage by weight of high reflectance hydrolysis layer material).Wherein, the one side near silicon wafer is high reflectance hydrolysis layer.
Further, the addition of described inorganic particulate is the 1-9%(percentage by weight of high reflectance hydrolysis layer material), or the 11-19%(percentage by weight).
Further, described base material is polyester film, its material comprises PETG (PET), polybutylene terephthalate (PBT), Polyethylene Naphthalate (PEN), a kind of in polycaprolactam (PA6) or the polyhexamethylene adipamide (PA66), the material of described barrier layer comprises Vingon (PVDC) or ethylene/vinyl alcohol copolymer (EVOH), the material of described hydrolysis layer and high reflectance hydrolysis layer comprises PETG, polybutylene terephthalate, Polyethylene Naphthalate or Merlon (PC), the material of described adhesive layer comprises ethylene-vinyl acetate, polyvinyl butyral resin, epoxy resin or polyurethane resin.
Further, described base material is biaxially oriented polyester film, is selected from biaxial tension PET film, biaxial tension PBT film, biaxial tension PEN film, biaxial tension PA6 film or biaxial tension PA66 film; Described hydrolysis layer and high reflectance hydrolysis layer are selected from biaxial tension PET film, biaxial tension PBT film, biaxial tension PEN film or PC film.
Further, the thickness of described base material is 75-250 μ m, and the thickness of described barrier layer is 10-30 μ m, and the thickness of described hydrolysis layer and high reflectance hydrolysis layer is 10-30 μ m.
Further, the thickness of described base material is 120-350 μ m, and the thickness of described barrier layer is 20-40 μ m, and the thickness of described hydrolysis layer and high reflectance hydrolysis layer is 20-40 μ m.
Further, the thickness of described base material can be 60-100 μ m, 130-188 μ m, 200-300 μ m, 280-330 μ m; The thickness of described barrier layer can be 8-15 μ m, 25-35 μ m; The thickness of described hydrolysis layer and high reflectance hydrolysis layer can be 8-15 μ m, 25-35 μ m; The thickness of described tack coat can be 2-5 μ m, 4-8 μ m.
Further, the thickness of described base material is 60-100 μ m, and the thickness of described barrier layer is 10-15 μ m, and the thickness of described hydrolysis layer and high reflectance hydrolysis layer is 10-30 μ m, and the thickness of described tack coat is 2-5 μ m.
The thinner thickness of above-mentioned high reflectance solar cell backboard film provided by the invention, and have preferably reflectivity and resistance to water, reaching preferably hot strength, combination property is better, and production cost is low.
Further, described hydrolysis layer and high reflectance hydrolysis layer contain additive, described additive is the composition of a kind of in carbodiimides, polycarbodiimide, epoxy radicals polyolefin, the maleation polyolefin or at least two kinds, and addition is the 0.5-10%(percentage by weight of hydrolysis layer or high reflectance hydrolysis layer material), preferred, described addition can be 1-5%, 3-8%, 2-6%, 0.9%, 7%, 8% or 9%.
Further, described high reflectance hydrolysis layer material is PETG or Merlon.
Further, described high reflectance hydrolysis layer is added with inorganic particulate, described inorganic particulate comprises a kind of or wherein at least two kinds the combination of titanium dioxide, barium sulfate, zinc oxide, calcium carbonate, silicon dioxide, and the particle diameter of particle is 0.3-1 μ m, and the addition of described inorganic particulate is the 1-10% of high reflectance hydrolysis layer material, 4-12%, 5-15%, 0.9%, 1%, 8%, 12% or 17%.
Described high reflectance hydrolysis layer has higher reflectivity owing to being added with inorganic particulate; Described hydrolysis layer (being called again common hydrolysis layer) does not contain inorganic particulate, has anti-hydrolytic performance, but does not possess high reflectance.
Further, the material of described high reflectance hydrolysis layer is PETG or Merlon, contains titanium dioxide or the zinc oxide of 1-9%, contains the polycarbodiimide of 1-5%.Further, the thickness of described high reflectance hydrolysis layer is 10-20 μ m, for example 15 μ m.
The present invention also provides a kind of preparation method of above-mentioned high reflectance solar cell backboard film, and described preparation method comprises the steps:
(1) with the upper and lower surface coating adhesive of base material, compound with two-layer barrier layer respectively in baking oven;
(2) at two barrier layer surface-coated adhesives, compound with hydrolysis layer and high reflectance hydrolysis layer respectively in baking oven, obtain described solar cell backboard film.
Further, add the 0.5-10%(percentage by weight in the materials such as PET, PBT, PEN or PC) above-mentioned additive, mix, extrude and carry out biaxial tension, obtain above-mentioned hydrolysis layer.
And, add the 0.5-10%(percentage by weight in the materials such as PET, PBT, PEN or PC) above-mentioned additive and 0.5-20%(percentage by weight) above-mentioned inorganic particulate, mix, extrude and carry out biaxial tension, obtain above-mentioned high reflectance hydrolysis layer.
Further, described base material and barrier layer, described barrier layer and hydrolysis layer or high reflectance hydrolysis layer are by adhesive hot pressing superimposion, and curing temperature is 80-160 ℃, and 90-100 ℃, or 110-120 ℃, be 1-5min curing time.
The present invention also provides a kind of solar cell, and described solar cell comprises above-mentioned high reflectance solar cell backboard film; Perhaps described solar cell comprises the high reflectance solar cell backboard film that is got by the said method preparation.
Compared with prior art, high reflectance solar cell backboard film provided by the invention has stronger cohesive force, good air and the isolation performance of moisture, good electrical insulation capability, higher hot strength, high surface reflectivity, can long term exposure under sunlight, and effectively reducing the caloric receptivity of solar energy back plate surface, improve the conversion efficiency of battery component, is the good solar cell backboard film of a kind of combination property.The simple easy operating of its preparation method technique.Solar cell provided by the invention is longer useful life.
Description of drawings
Fig. 1 is the cross-sectional view of high reflectance solar cell backboard film provided by the invention.
Wherein, 1 is base material, and 2 is barrier layer, and 3 is tack coat, and 4 is the hydrolysis layer, and 5 is high reflectance hydrolysis layer.
Embodiment
As shown in Figure 1, high reflectance solar cell backboard film provided by the invention comprises base material 1, described base material 1 both sides are provided with barrier layer 2, described barrier layer 2 is connected by tack coat 3 with described base material 1, described barrier layer 2 both sides are respectively arranged with hydrolysis layer 4 and high reflectance hydrolysis layer 5, and described hydrolysis layer 4 is connected by tack coat 3 with described barrier layer 2 with high reflectance hydrolysis layer 5; The thickness of described base material 1 is 50-400 μ m, and the thickness of described barrier layer 2 is 5-50 μ m, and the thickness of described hydrolysis layer 4 and high reflectance hydrolysis layer 5 is 5-50 μ m, and the thickness of described tack coat 3 is 1-10 μ m.
The used material and facility of the present invention is current material and equipment, and for example: described biaxial tension PET film, biaxial tension PBT film can be available from E.I.Du Pont Company; Described biaxial tension PEN film, biaxial tension PA6 film, biaxial tension PA66 film can be available from Teijin Ltd.Hydrolysis film and high reflectance hydrolysis film are all made by oneself, and other material is the common product in market.
Add the 0.5-10%(percentage by weight in PET, PBT, PEN or the PC) additive, mix, extrude and carry out biaxial tension, obtain the hydrolysis layer.
Add the 0.5-10%(percentage by weight to PET, PBT, PEN or PC) additive and the inorganic particulate of 0.5-20% weight portion, mix, extrude and carry out biaxial tension, obtain high reflectance hydrolysis layer.
Described additive is the combination of a kind of in carbodiimides, polycarbodiimide, epoxy radicals polyolefin, the maleation polyolefin or at least two kinds; Described inorganic particulate comprises the combination of a kind of of titanium dioxide, barium sulfate, zinc oxide, calcium carbonate, silicon dioxide or at least two kinds, and the particle diameter of particle is 0.3-1 μ m.
The preparation method of high reflectance solar cell backboard film provided by the invention comprises the steps:
(1) with the upper and lower surface coating adhesive of base material, in baking oven, upper and lower surface is compound with two-layer barrier layer respectively;
(2) at two barrier layer surface-coated adhesives, in baking oven, upper and lower surface is compound with hydrolysis layer and high reflectance hydrolysis layer respectively, obtains described solar cell backboard film.
Make according to the method described above high reflectance solar cell backboard film, its performance test methods is as follows:
Hot strength and elongation at break: according to the GB/T1040-2006 standard, the INSTRON universal testing machine that adopts U.S. Instron company to produce, hot strength and the elongation at break of test high reflectance solar cell backboard film.
Moisture-vapor transmission: according to the GB/T1037-1988 standard testing, adopt the TSY-W2 water vapor permeation rate tester that notacoria is tested.
Reflectivity: according to GB/T GB/T3979-2008 standard testing, the ColorQuest XE spectrophotometric color measurement instrument that adopts U.S. Hunterlab company to produce, under D65 light source condition, by its reflectivity of integrating sphere d/8 ° structured testing, reflectivity data be 400-700nm every the weighted average of the reflectivity of 10nm wavelength, the energy distribution curve of the corresponding D65 light source of weights.
Percent thermal shrinkage: sample is placed on half an hour in 150 ℃ of baking ovens, measures its percent thermal shrinkage.
Among the embodiment 1-18 provided by the invention, described base material is biaxially oriented polyester film, is selected from biaxial tension PET film, biaxial tension PBT film, biaxial tension PEN film, biaxial tension PA6 film or biaxial tension PA66 film; Described hydrolysis layer and high reflectance hydrolysis layer are selected from biaxial tension PET film, biaxial tension PBT film, biaxial tension PEN film or PC film.
Embodiment 1
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even ethylene-vinyl acetate adhesive of coating 2 μ m of upper and lower surface of 250 μ m base material PET films at thickness, in 100 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 20 μ m is compound with two layers of thickness, be the ethylene-vinyl acetate adhesive of 2 μ m at two barrier layer surface-coated thickness, in 100 ℃ of baking ovens, be that high reflectance hydrolysis layer and the hydrolysis layer (claiming again common hydrolysis layer) of 25 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.Gained notacoria correlated performance sees Table 1.
Embodiment 2
Prepare according to the method described above first hydrolysis layer and high reflectance hydrolysis layer, be the polyvinyl butyral cementing agent of the even coating of the upper and lower surface 4 μ m of 250 μ m base material PET films afterwards at thickness, in 110 ℃ of baking ovens, be that the EVOH thin-film barrier layer of 10 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 4 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 25 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.Gained notacoria correlated performance sees Table 1.
Embodiment 3
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even epobond epoxyn of coating 5 μ m of upper and lower surface of 250 μ m base material PET films at thickness, in 120 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 20 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 5 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the hydrolysis layer of 25 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.Gained notacoria correlated performance sees Table 1.
Embodiment 4
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even ethylene-vinyl acetate adhesive of coating 4 μ m of upper and lower surface of 188 μ m base material PET films at thickness, in 100 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 40 μ m is compound with two layers of thickness, be the ethylene-vinyl acetate adhesive of 4 μ m at two barrier layer surface-coated thickness, in 100 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 50 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.Gained notacoria correlated performance sees Table 1.
Embodiment 5
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even polyvinyl butyral cementing agent of coating 10 μ m of upper and lower surface of 188 μ m base material PET films at thickness, in 110 ℃ of baking ovens, be that the EVOH thin-film barrier layer of 40 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 10 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 50 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.Gained notacoria correlated performance sees Table 1.
Embodiment 6
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even epobond epoxyn of coating 6 μ m of upper and lower surface of 188 μ m base material PET films at thickness, in 120 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 40 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 6 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 50 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.Gained notacoria correlated performance sees Table 1.
Table 1 embodiment 1-6 gained solar energy back film performance test table
Embodiment 7
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even ethylene-vinyl acetate adhesive of coating 1 μ m of upper and lower surface of 50 μ m base material PET films at thickness, in 100 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 5 μ m is compound with two layers of thickness, be the ethylene-vinyl acetate adhesive of 1 μ m at two barrier layer surface-coated thickness, in 100 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 5 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention; Described common hydrolysis layer and high reflectance hydrolysis layer are biaxial tension PBT film, and additive is the combination of carbodiimides and polycarbodiimide, and addition is 5%, and the inorganic particulate that high reflectance hydrolysis layer adds is titanium dioxide, and addition is 10%.Gained notacoria correlated performance sees Table 2.
Embodiment 8
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even polyvinyl butyral cementing agent of coating 2 μ m of upper and lower surface of 60 μ m base material PBT films at thickness, in 110 ℃ of baking ovens, be that the EVOH thin-film barrier layer of 8 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 2 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 10 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention; Described common hydrolysis layer and high reflectance hydrolysis layer are biaxial tension PEN film, and additive is the epoxy radicals polyolefin, and addition is 0.5%, and the inorganic particulate that high reflectance hydrolysis layer adds is the combination of barium sulfate and calcium carbonate, and addition is 0.5%.Gained notacoria correlated performance sees Table 2.
Embodiment 9
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even epobond epoxyn of coating 2 μ m of upper and lower surface of 75 μ m base material pen films at thickness, in 120 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 5 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 2 μ m at two barrier layer surface-coated thickness, in 130 ℃ of baking ovens, be that high reflectance hydrolysis layer and the hydrolysis layer of 8 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention; Described common hydrolysis layer and high reflectance hydrolysis layer are the PC film, and additive is the maleation polyolefin, and addition is 10%, and the inorganic particulate that high reflectance hydrolysis layer adds is zinc oxide, and addition is 20%.Gained notacoria correlated performance sees Table 2.
Embodiment 10
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even ethylene-vinyl acetate adhesive of coating 3 μ m of upper and lower surface of 100 μ m base material PA6 films at thickness, in 100 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 15 μ m is compound with two layers of thickness, be the ethylene-vinyl acetate adhesive of 3 μ m at two barrier layer surface-coated thickness, in 100 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 20 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.The material of described high reflectance hydrolysis layer is Merlon, contains 9% zinc oxide, contains 1% polycarbodiimide.Gained notacoria correlated performance sees Table 2.
Embodiment 11
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even polyvinyl butyral cementing agent of coating 5 μ m of upper and lower surface of 120 μ m base material PA66 films at thickness, in 110 ℃ of baking ovens, be that the EVOH thin-film barrier layer of 10 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 5 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 15 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.The material of described high reflectance hydrolysis layer is PETG, contains 1% titanium dioxide, contains 5% polycarbodiimide.Gained notacoria correlated performance sees Table 2.
Embodiment 12
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even polyurethane resin adhesive of coating 6 μ m of upper and lower surface of 130 μ m base material PET films at thickness, in 120 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 25 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 6 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 30 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.Gained notacoria correlated performance sees Table 2.
Table 2 embodiment 7-12 gained solar energy back film performance test table
Embodiment 13
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even ethylene-vinyl acetate adhesive of coating 2 μ m of upper and lower surface of 200 μ m base material PET films at thickness, in 100 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 30 μ m is compound with two layers of thickness, be the ethylene-vinyl acetate adhesive of 2 μ m at two barrier layer surface-coated thickness, in 100 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 35 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention; Described common hydrolysis layer and high reflectance hydrolysis layer are biaxial tension PET film, and additive is carbodiimides, and addition is 6%, and the inorganic particulate that high reflectance hydrolysis layer adds is silicon dioxide, and addition is 12%.Gained notacoria correlated performance sees Table 3.
Embodiment 14
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even polyvinyl butyral cementing agent of coating 4 μ m of upper and lower surface of 280 μ m base material PET films at thickness, in 110 ℃ of baking ovens, be that the EVOH thin-film barrier layer of 35 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 4 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 40 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.Gained notacoria correlated performance sees Table 3.
Embodiment 15
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even epobond epoxyn of coating 5 μ m of upper and lower surface of 330 μ m base material PBT films at thickness, in 120 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 20 μ m is compound with two layers of thickness, be the epobond epoxyn of 5 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the hydrolysis layer of 35 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention, described common hydrolysis layer and high reflectance hydrolysis layer are the PC film, additive is polycarbodiimide, addition is 8%, the inorganic particulate that high reflectance hydrolysis layer adds is silicon dioxide, and addition is 15%.Gained notacoria correlated performance sees Table 3.
Embodiment 16
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even polyurethane resin adhesive of coating 8 μ m of upper and lower surface of 350 μ m base material PET films at thickness, in 160 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 30 μ m is compound with two layers of thickness, be the ethylene-vinyl acetate adhesive of 8 μ m at two barrier layer surface-coated thickness, in 160 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 50 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.The material of described high reflectance hydrolysis layer is Merlon, contains 5% titanium dioxide, contains 3% polycarbodiimide.Gained notacoria correlated performance sees Table 3.
Embodiment 17
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even polyurethane resin adhesive of coating 5 μ m of upper and lower surface of 400 μ m base material PET films at thickness, in 80 ℃ of baking ovens, be that the EVOH thin-film barrier layer of 25 μ m is compound with two layers of thickness, be the polyurethane resin adhesive of 5 μ m at two barrier layer surface-coated thickness, in 80 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 40 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.The material of described high reflectance hydrolysis layer is Merlon, contains 9% zinc oxide, contains 1% polycarbodiimide.Gained notacoria correlated performance sees Table 3.
Embodiment 18
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even epobond epoxyn of coating 6 μ m of upper and lower surface of 188 μ m base material PET films at thickness, in 120 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 50 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 6 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the common hydrolysis layer of 50 μ m is compound with thickness respectively, obtain high reflectance solar cell backboard film provided by the invention.The material of described high reflectance hydrolysis layer is PETG, contains 1% titanium dioxide, contains 5% polycarbodiimide.Gained notacoria correlated performance sees Table 3.
Table 3 embodiment 13-18 gained solar energy back film performance test table
Comparative Examples 1
Be the even epobond epoxyn of coating 1 μ m of upper and lower surface of 50 μ m base material PBT films at thickness, in 120 ℃ of baking ovens, be that the PVDC thin-film barrier layer of 2 μ m is compound with two layers of thickness, be the epobond epoxyn of 1 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, upper and lower surface is that high reflectance hydrolysis layer and the hydrolysis layer of 3 μ m is compound with thickness respectively, obtain the solar cell backboard film, described common hydrolysis layer and high reflectance hydrolysis layer are the PC film, additive is polycarbodiimide, and the inorganic particulate that adds in the high reflectance hydrolysis layer is silicon dioxide.
Compare with technical scheme provided by the invention, the barrier layer of this solar cell backboard film, the thickness of high reflectance hydrolysis layer and hydrolysis layer is too small, causes the resistance to water of notacoria relatively poor, reflectivity is not high.
Gained notacoria correlated performance sees Table 4.
Comparative Examples 2
Preparation biaxial tension PET film, as the hydrolysis layer, it is the even ethylene-vinyl acetate adhesive of coating 2 μ m of upper and lower surface of the base material PET film of 250 μ m at thickness, in 100 ℃ of baking ovens, be that the EVOH thin-film barrier layer of 20 μ m is compound with two layers of thickness, be the ethylene-vinyl acetate adhesive of 2 μ m at two barrier layer surface-coated thickness, in 100 ℃ of baking ovens, upper and lower surface is that the hydrolysis layer of 25 μ m is compound with thickness respectively, obtains the solar cell backboard film.
Compare with technical scheme provided by the invention, do not contain inorganic particulate in the hydrolysis layer of this solar cell backboard film, reflectivity is relatively poor.Gained notacoria correlated performance sees Table 4.
Comparative Examples 3
Prepare according to the method described above hydrolysis layer and high reflectance hydrolysis layer, be the even epobond epoxyn of coating 5 μ m of upper and lower surface of 250 μ m base material PET films at thickness, in 100 ℃ of baking ovens, be that the EVOH thin-film barrier layer of 20 μ m is compound with two layers of thickness, be the polyvinyl butyral cementing agent of 5 μ m at two barrier layer surface-coated thickness, in 110 ℃ of baking ovens, be that high reflectance hydrolysis layer and the hydrolysis layer of 25 μ m is compound with thickness respectively, obtain the solar cell backboard film; Described common hydrolysis layer and high reflectance hydrolysis layer are the PC film, and additive is polycarbodiimide, and addition is 6%, and the inorganic particulate that high reflectance hydrolysis layer adds is silicon dioxide, and addition is 25%.
Compare with technical scheme provided by the invention, the inorganic particulate addition in the above-mentioned high reflectance hydrolysis layer is excessive, has caused notacoria anti-hydrolytic performance, hot strength and shrinkage relatively poor.Gained notacoria correlated performance sees Table 4.
Table 4 Comparative Examples 1-4 gained solar energy back film performance test table
Can draw according to the data among the table 1-4, high reflectance solar cell backboard film provided by the invention has stronger cohesive force, good air and the isolation performance of moisture and high surface reflectivity, can long term exposure under sunlight, and effectively reduce the caloric receptivity of solar energy back plate surface, improving the conversion efficiency of battery component, is a kind of outstanding solar cell backboard film.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Every equalization that content is done according to the present invention changes and modifies, and all is encompassed in the claim of the present invention.
Claims (10)
1. high reflectance solar cell backboard film, it is characterized in that, described backboard membrane comprises base material, described base material both sides are provided with barrier layer, described barrier layer is connected by tack coat with described base material, described barrier layer both sides are respectively arranged with hydrolysis layer and high reflectance hydrolysis layer, and described hydrolysis layer is connected by tack coat with described barrier layer with high reflectance hydrolysis layer; The thickness of described base material is 50-400 μ m, and the thickness of described barrier layer is 5-50 μ m, and the thickness of described hydrolysis layer and high reflectance hydrolysis layer is 5-50 μ m, and the thickness of described tack coat is 1-10 μ m; Described high reflectance hydrolysis layer is added with inorganic particulate, and addition is the 0.5-20%(percentage by weight of high reflectance hydrolysis layer material).
2. high reflectance solar cell backboard film according to claim 1, it is characterized in that, described base material is polyester film, its material comprises PETG, polybutylene terephthalate, Polyethylene Naphthalate, a kind of in polycaprolactam or the polyhexamethylene adipamide, the material of described barrier layer comprises Vingon or ethylene/vinyl alcohol copolymer, the material of described hydrolysis layer and high reflectance hydrolysis layer comprises PETG, polybutylene terephthalate, Polyethylene Naphthalate or Merlon, the material of described adhesive layer comprises ethylene-vinyl acetate, polyvinyl butyral resin, epoxy resin or polyurethane resin.
3. high reflectance solar cell backboard film according to claim 1 is characterized in that, the addition of described inorganic particulate is the 1-9%(percentage by weight of high reflectance hydrolysis layer material).
4. high reflectance solar cell backboard film according to claim 1 is characterized in that, the addition of described inorganic particulate is the 11-19%(percentage by weight of high reflectance hydrolysis layer material).
5. high reflectance solar cell backboard film according to claim 2, it is characterized in that, described hydrolysis layer and high reflectance hydrolysis layer contain additive, described additive is the combination of a kind of in carbodiimides, polycarbodiimide, epoxy radicals polyolefin, the maleation polyolefin or at least two kinds, and addition is the 0.5-10%(percentage by weight of hydrolysis layer or high reflectance hydrolysis layer material).
6. high reflectance solar cell backboard film according to claim 2 is characterized in that, described high reflectance hydrolysis layer material is PETG or Merlon.
7. high reflectance solar cell backboard film according to claim 2, it is characterized in that, described inorganic particulate comprises the combination of a kind of of titanium dioxide, barium sulfate, zinc oxide, calcium carbonate, silicon dioxide or at least two kinds, and the particle diameter of particle is 0.3-1 μ m.
8. the preparation method of described high reflectance solar cell backboard film one of according to claim 1-7 is characterized in that, described preparation method comprises the steps:
(1) with the upper and lower surface coating adhesive of base material, compound with two-layer barrier layer respectively in baking oven;
(2) at two barrier layer surface-coated adhesives, compound with hydrolysis layer and high reflectance hydrolysis layer respectively in baking oven, obtain described solar cell backboard film.
9. the preparation method of high reflectance solar cell backboard film according to claim 8, it is characterized in that, described base material and barrier layer, described barrier layer and hydrolysis layer or high reflectance hydrolysis layer are by adhesive hot pressing superimposion, curing temperature is 80-160 ℃, and be 1-5min curing time.
10. a solar cell is characterized in that, described solar cell comprises the described high reflectance solar cell backboard of one of claim 1-7 film.
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| CN104409550A (en) * | 2014-11-19 | 2015-03-11 | 苏州尚善新材料科技有限公司 | Solar back plate having high reflective rate |
| CN104485377A (en) * | 2014-12-18 | 2015-04-01 | 江苏宇昊新能源科技有限公司 | Solar backing film with high conversion efficiency |
| CN104835870A (en) * | 2015-03-26 | 2015-08-12 | 乐凯胶片股份有限公司 | Solar cell backboard |
| CN105015121A (en) * | 2015-08-24 | 2015-11-04 | 宜兴市王者塑封有限公司 | Adhesive film integrated modified polyolefin backboard film and preparation method thereof |
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| CN105015121A (en) * | 2015-08-24 | 2015-11-04 | 宜兴市王者塑封有限公司 | Adhesive film integrated modified polyolefin backboard film and preparation method thereof |
| CN108701731A (en) * | 2015-12-23 | 2018-10-23 | 安姆科灵活交换有限公司 | Heat reflection solar energy module |
| CN105870236A (en) * | 2016-04-13 | 2016-08-17 | 黄广明 | Poly-silicon photovoltaic cell panel |
| CN106024950A (en) * | 2016-07-26 | 2016-10-12 | 无锡中洁能源技术有限公司 | Solar cell backboard with high adhesion rate |
| CN106024953A (en) * | 2016-07-27 | 2016-10-12 | 无锡中洁能源技术有限公司 | Solar energy backboard with high-reflectivity coating layer |
| WO2018054299A1 (en) * | 2016-09-20 | 2018-03-29 | Dsm Ip Assets B. V. | A coating liquid, coating composition and the substrate coated with the same |
| CN106449822A (en) * | 2016-11-22 | 2017-02-22 | 浙江昱辉阳光能源江苏有限公司 | High-power double-glazed module with high-reflective coating |
| WO2019061165A1 (en) * | 2017-09-27 | 2019-04-04 | 中天光伏材料有限公司 | Preparation method for highly reflective solar cell back panel film |
| CN108831940A (en) * | 2018-06-13 | 2018-11-16 | 晶科能源科技（海宁）有限公司 | Improve the photovoltaic module and preparation method thereof of Reflecting backboard |
| CN108963024A (en) * | 2018-07-12 | 2018-12-07 | 杭州福斯特应用材料股份有限公司 | A kind of integral photovoltaic encapsulating material of high reflectance and application |
| CN108963024B (en) * | 2018-07-12 | 2020-05-19 | 杭州福斯特应用材料股份有限公司 | High-reflectivity integrated photovoltaic packaging material and application thereof |
| CN110190144A (en) * | 2019-05-15 | 2019-08-30 | 安徽金兑新材料科技有限公司 | A kind of high reflectance solar cell backboard film and preparation method thereof |
| TWI704997B (en) * | 2019-09-24 | 2020-09-21 | 南亞塑膠工業股份有限公司 | Back panel of solar cell and method for manufacturing the same, and method for manufacturing solar cell module |
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Address after: Qingfeng Road, Jiangbei District 315000 in Zhejiang city of Ningbo province No. 999 Patentee after: Ningbo, Changyang, Polytron Technologies Inc Address before: 315031 Zhejiang province Jiangbei District of Ningbo City Green Road Zhu Xiang (1) - (4) Patentee before: Ningbo Changyang Technology Co., Ltd. |
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Application publication date: 20130403 Assignee: Ningbo Changlong New Material Co.,Ltd. Assignor: NINGBO SOLARTRON TECHNOLOGY Co.,Ltd. Contract record no.: X2021330000199 Denomination of invention: A high reflectivity solar cell back plate film and a solar cell Granted publication date: 20151118 License type: Common License Record date: 20210831 |