CN221125968U - Base film for black opaque solar cell backboard and preparation system - Google Patents
Base film for black opaque solar cell backboard and preparation system Download PDFInfo
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- CN221125968U CN221125968U CN202323150923.9U CN202323150923U CN221125968U CN 221125968 U CN221125968 U CN 221125968U CN 202323150923 U CN202323150923 U CN 202323150923U CN 221125968 U CN221125968 U CN 221125968U
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- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000004544 sputter deposition Methods 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 11
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000006229 carbon black Substances 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000002105 nanoparticle Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000002310 reflectometry Methods 0.000 abstract description 14
- 239000010410 layer Substances 0.000 description 45
- 230000000052 comparative effect Effects 0.000 description 17
- 239000000049 pigment Substances 0.000 description 13
- 239000011159 matrix material Substances 0.000 description 12
- 229920000139 polyethylene terephthalate Polymers 0.000 description 11
- 239000000843 powder Substances 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000002346 layers by function Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- LBSANEJBGMCTBH-UHFFFAOYSA-N manganate Chemical compound [O-][Mn]([O-])(=O)=O LBSANEJBGMCTBH-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
The application provides a base film for a black opaque solar cell backboard, which at least comprises a black base material (11) and a semi-transparent reflecting layer (12) formed on one side of the black base material (11) facing a solar cell piece through vacuum sputtering, wherein the thickness of the semi-transparent reflecting layer (12) is 3-5 mu m; the thickness of the black substrate (11) is 200-250 mu m. The application further provides a preparation system of the base film for the black opaque solar cell backboard. The black opaque solar cell back plate base film prepared by the preparation system can obviously improve the reflectivity of light and reduce the temperature of the back surface of the base film. Meanwhile, through observation, the base film is black.
Description
Technical Field
The utility model relates to a base film for a black opaque solar cell backboard and a preparation system.
Background
CN 114536906A discloses a power gain type black photovoltaic backboard, which comprises a black layer, an inner coating, a supporting layer and an outer layer which are sequentially arranged from inside to outside, wherein the position of the black layer corresponds to the gap of a cell of a photovoltaic module; the supporting layer contains filler, wherein the filler comprises 75-95% of spherical alumina, silica micropowder, aluminum nitride, boron nitride, zinc oxide and magnesium oxide with average particle diameter of 0.01-20 mu m and 5-25% of rutile titanium dioxide with average particle diameter of 0.2-0.8 mu m. The photovoltaic backboard in the prior art enables the packaging material to be matched with the colors of the battery pieces through the black layer arranged on the grid, and achieves the effect of attractive appearance.
CN 113299782B discloses a transparent back plate with high-reflectivity black grid, which comprises a transparent back plate matrix and a high-reflectivity black grid ink layer printed on the transparent back plate matrix, wherein the transparent back plate matrix comprises a weather-resistant layer, a transparent PET matrix layer and a transparent interface layer which are sequentially pressed from top to bottom, the high-reflectivity black grid ink layer is formed by coating grid ink, and the grid ink comprises the following raw materials in parts by weight: 30-70 parts of main resin, 5-10 parts of solvent, 20-70 parts of pigment and filler, 3-10 parts of curing agent and 2-10 parts of auxiliary agent. According to the prior art, the black grid ink layer with high reflectivity is arranged to achieve a black appearance effect, and meanwhile, the black grid ink layer has high reflectivity in an infrared band, the reflectivity of the band of 800-1600nm is up to 30-75%, and infrared light energy in the band is fully utilized to generate electricity.
The black grids in the prior art need to be aligned with the gaps of the battery pieces so as to obtain a good black appearance effect from the front. The slight misalignment during the assembly and installation of the photovoltaic modules can destroy the alignment relationship, so that the black grid back plate has much lower benefit in practical application than the cost investment.
CN 115995499A discloses a black photovoltaic back plate, comprising a photovoltaic back plate substrate, a black coating and a protective layer which are laminated in sequence; the thickness of the protective layer is 1-3 mu m. In the prior art, a black coating is coated on the surface of a substrate, and the whole backboard is black. However, the black coating appears black because it absorbs all visible light in the spectrum and does not reflect light of any color, so the perception of the human eye is black. The black coating absorbs light and simultaneously causes heat aggregation, so that the power generation efficiency and the service life of the photovoltaic module are reduced.
CN 113471316A discloses a solar black backboard with high infrared reflectivity, which comprises a weather-resistant layer, a bonding layer, a PET substrate layer and a functional layer which are sequentially arranged, wherein the functional layer is adjacent to an EVA adhesive layer of a solar cell; the functional layer is prepared from the following raw materials in parts by weight: 20-30 parts of orthoyttrium manganate powder, 10-15 parts of nano titanium dioxide, 40-60 parts of epoxy resin, 15-20 parts of black pigment, 1-3 parts of dispersing agent and 8-10 parts of solvent. According to the solar black backboard in the prior art, the functional layer is black through the black pigment, and the reflectivity of visible light and near infrared light is improved through the combination of the orthoyttrium manganate powder and the nano titanium dioxide. However, as previously mentioned, the black pigment is based on the principle that it does not reflect light of any color, and this prior art states that the combination of yttrium orthomanganate powder and nano-titania reflects a large portion of light, whereas the combination of powdered yttrium orthomanganate powder and nano-titania forms diffuse reflection, so that light returned to the human eye by diffuse reflection causes the back sheet to appear in the color of visible light, whereas the black pigment only absorbs a small portion of light, and should not cause the back sheet to appear purely black for a relatively large portion of light that is diffusely reflected.
CN 116444886A discloses a black solar backboard with high reflectivity and a preparation method thereof, the solar backboard comprises a structural layer, a transition layer and a black functional layer which are arranged from top to bottom, a weather-proof layer is selectively arranged on one surface of the structural layer far away from the transition layer, a second transition layer is selectively arranged between the structural layer and the weather-proof layer, the structural layer is made of reflective pigment, the transition layer and the black functional layer are both made of transmissive pigment, and light rays emitted to the structural layer are reflected by utilizing the transmittance of the transmissive pigment in an infrared spectrum region. According to the prior art, the high-reflectivity black solar backboard is prepared through a multilayer coextrusion process, and the reflectivity is synergistically improved through controlling the addition amount of the transmission type pigment and the pigment particle size in the transition layer and the black functional layer. However, since the enhancement of reflectance is achieved by a powdery pigment, which is diffusely reflected to light, the diffusely reflected light rays enter the human eye to exhibit the color of visible light, similarly to the aforementioned prior art.
Disclosure of Invention
The technical problem to be solved by the application is to provide a base film for a black opaque solar cell back plate and a preparation system, so as to reduce or avoid the problems.
In order to solve the technical problems, the application provides a base film for a black opaque solar cell backboard, which at least comprises a black base material and a semi-transparent reflecting layer formed on one side of the black base material facing a solar cell piece through vacuum sputtering, wherein the thickness of the semi-transparent reflecting layer is 3-5 mu m, and the thickness of the black base material is 200-250 mu m.
The application also provides a preparation system of the base film for the black opaque solar cell backboard, which comprises a first mixing bin for nano particles of FeS, graphite, carbon black and manganese dioxide and PET slices; the outlet of the first mixing bin is connected with a single-screw extruder for preparing black master batch; the outlet of the single-screw extruder is connected with a second mixing bin for black masterbatch and PET slices; the outlet of the second mixing bin is connected with a double-screw extruder; the outlet of the double-screw extruder is connected with a film biaxial stretching mechanism for stretching and preparing a black substrate; the outlet of the film biaxial stretching mechanism is connected with a vacuum sputtering device for forming a semi-transparent reflecting layer on one side surface of the black substrate.
Preferably, a target for forming the semi-reflective layer is provided in the vacuum sputtering apparatus.
The black opaque solar cell back plate base film prepared by the preparation system can obviously improve the reflectivity of light and reduce the temperature of the back surface of the base film. Meanwhile, through observation, the base film is black.
Drawings
The following drawings are only for purposes of illustration and explanation of the present application and are not intended to limit the scope of the application.
Fig. 1 is a schematic view showing the structure of a base film for a black opaque solar cell back sheet according to an embodiment of the present application.
Fig. 2 is a schematic diagram showing the structure of a preparation system for the base film shown in fig. 1.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present application, a specific embodiment of the present application will be described with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals.
Fig. 1 shows a schematic structure of a base film for a black opaque solar cell back sheet, which can be used for a support structure in a solar cell back sheet of a multilayer composite structure, according to the present application. In fig. 1, the black opaque solar cell back sheet base film of the present application is generally indicated by reference numeral 10, and a weather-resistant film 30 may be adhered to the inner side (side adjacent to the solar cell sheet) of the black opaque solar cell back sheet base film 10 by an adhesive 20, wherein the weather-resistant film 30 may be a fluoropolymer film commonly used in the art, such as a polyvinyl fluoride weather-resistant film, and the adhesive 20 may be an EVA adhesive commonly used in the art.
In the drawings, for ease of understanding, the adhesive layer 20 and the weather-resistant film 30, which do not belong to the base film 10, are shown in an exploded manner, and are shown in broken lines.
As shown in the drawing, the base film 10 for a black opaque solar cell back sheet of the present application comprises at least one black base material 11 and a semi-reflective layer 12 formed by vacuum sputtering on a side of the black base material 11 facing a solar cell sheet (not shown in the drawing), wherein the black base material 11 is made of a PET film to which a black pigment is added, and the semi-reflective layer 12 is formed by sputtering of 55 to 60wt% Ag and 40 to 45wt% ZnS. In one embodiment, the thickness of the transflective layer 12 is 3-5 μm.
Photovoltaic panels are typically mounted on the ground at an oblique angle, approximately perpendicular to the noon sun. The surface of the black substrate of the base film for the black opaque solar cell back sheet of the present application is formed with a semi-reflective film resembling a mirror surface, and by utilizing the characteristic of specular reflection, the semi-reflective film can reflect most of the light rays, which are reflected substantially toward the sun and thus hardly reflected into the human eye, and thus the reflected light is invisible from the viewpoint of an observer. This is somewhat analogous to the principle of a mirror reflecting light, which is only visible in color when reflected by the mirror into the human eye, while from other angles the mirror is invisible. Because the gaps of the solar cell are very small, the color of the sky reflected from the small gaps to the eyes is mostly dark blue (sunny day) or gray (overcast day), and therefore, the eyes observe and display dark colors. Of course, since the transflective film is still capable of transmitting the background color of a portion of the black matrix, the color displayed from the slit of the battery cell may be closer to the black or deep blue of the battery cell.
The black base material 11 may be formed by melt-extruding and then biaxially stretching PET chips mixed with a black pigment. In one embodiment, the black matrix 11 has a thickness of 200-250 μm.
In another embodiment of the present application, the black matrix 11 is composed of FeS, graphite, carbon black, manganese dioxide, and PET. Further, the content of FeS, graphite, carbon black and manganese dioxide in the black base material 11 is 0.5-0.8wt%, 2.0-5.0wt%, 5.0-8.0wt% and 0.2-0.4wt% respectively. In still another specific embodiment, the visible light transmittance of the black matrix 11 is preferably less than 0.1%.
The transflective layer 12 may be formed on the side of the black matrix 11 facing the solar cell sheet by a vacuum sputtering process by uniformly mixing 55 to 60wt% of Ag powder with 40 to 45wt% of ZnS powder and then pressing into a target shape. The particle size of the Ag powder is preferably 20-30nm, and the particle size of the ZnS powder is preferably 5-10nm.
Further, the base film 10 for a black opaque solar cell back sheet of the present application can be prepared by the following steps. Firstly, nano particles of FeS, graphite, carbon black and manganese dioxide which are purchased or prepared and 50% of PET slices are weighed by an electronic scale and uniformly mixed, and the mixture is added into a single screw extruder to extrude the slices to prepare the black master batch. And then uniformly mixing the black master batch with the rest 50% of PET slices, adding the mixture into a double-screw extruder, forming a thick slice through melt extrusion, and carrying out biaxial stretching, cooling shaping, rolling and slitting on the thick slice to prepare the black matrix 11.
Then, the target material obtained by pressing Ag powder and ZnS powder in a weight ratio is placed in a vacuum sputtering apparatus, and the transflective layer 12 is formed on one side surface of the black matrix 11 by a vacuum sputtering process.
The outer side of the transflective layer 12 of the base film 10 for black opaque solar cell back sheet prepared by the above steps may be bonded with the weather-resistant film 30 by coating the adhesive layer 20 to form a solar cell back sheet of a composite structure. Of course, it should be understood by those skilled in the art that other functional structural layers, such as a flame retardant layer, a heat conductive layer, etc., may be bonded as needed on the side of the base film 10 for a black opaque solar cell back sheet of the present application remote from the weather resistant film 30.
Corresponding to the method, the application further provides a preparation system of the base film for the black opaque solar cell backboard. Wherein, as described above, the base film 10 comprises at least a black base material 11 and a semi-reflective layer 12 formed on the side of the black base material 11 facing the solar cell by vacuum sputtering. As shown in fig. 2, the preparation system for a base film for a black opaque solar cell back sheet of the present application includes a first mixing bin 101 for nano particles of FeS, graphite, carbon black, manganese dioxide, and PET chips; the outlet of the first mixing bin 101 is connected with a single-screw extruder 102 for preparing black masterbatch; the outlet of the single screw extruder 102 is connected with a second mixing bin 103 for black masterbatch and PET chips; the outlet of the second mixing bin 103 is connected with a double-screw extruder 104; the outlet of the double-screw extruder is connected with a film biaxial stretching mechanism 300 for stretching and preparing a black substrate; the outlet of the film biaxially stretching mechanism 300 is connected to the vacuum sputtering apparatus 400 for forming a transflective layer on one side surface of the black substrate.
The characteristic parameters of the base film for a black opaque solar cell back sheet of the present application are described in further detail below by way of specific examples. In examples 1 to 3 and comparative examples 1 to 3, black matrix 11 was prepared in the following weight ratio (wt%) respectively.
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| FeS | 0.5 | 0.6 | 0.8 | 0 | 0.6 | 0.8 |
| Graphite | 2.0 | 3.5 | 5.0 | 2.5 | 0 | 5.5 |
| Carbon black | 5.0 | 6.5 | 8.0 | 5.0 | 6.5 | 8.0 |
| Manganese dioxide | 0.2 | 0.3 | 0.5 | 0.2 | 3.8 | 0 |
| PET slice | 92.3 | 89.1 | 85.7 | 92.3 | 89.1 | 85.7 |
| Thickness (μm) | 200 | 225 | 250 | 200 | 225 | 250 |
According to the above ratio, black base material 11 having a single layer structure was prepared by melt extrusion and biaxial stretching, and the visible light transmittance of test examples 1 to 3 and comparative examples 1 to 3 were respectively: 0.08%,0.09%,0.1%,6.4%,5.3%,7.5%.
In examples 4 to 6 and comparative examples 4 to 6, the transflective layer 12 was formed on one side surface of the black base material 11 by vacuum sputtering in the following weight ratio (wt%) respectively.
| Example 4 | Example 5 | Example 6 | Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| Black base material | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Ag | 55 | 57 | 60 | 100 | 40 | 0 |
| ZnS | 45 | 43 | 40 | 0 | 60 | 100 |
| Transflective layer (mum) | 3 | 4 | 5 | 3 | 4 | 5 |
The reflectance (%) of the base films for black opaque solar cell back sheets of examples 4 to 6 and comparative examples 4 to 6, respectively, was measured in a wavelength range of 400 to 2500nm with reference to the test standard of IEC-62805-2.
| Wavelength range | Example 4 | Example 5 | Example 6 | Comparative example 4 | Comparative example 5 | Comparative example 6 |
| 400-780nm | 84 | 86 | 88 | 43 | 45 | 50 |
| 780-1100nm | 89 | 91 | 92 | 44 | 46 | 49 |
| 1100-2500nm | 90 | 93 | 94 | 39 | 42 | 47 |
The base film was placed outdoors 60 cm (grassland), facing south, at a horizontal angle of 30 degrees, and continuously tested for 30 days at an outdoor temperature of 25-35 ℃ and a relative humidity of 60-85%, and the maximum values of the center temperature of the back surface of the base film were collected 14:00 a day, with the maximum temperatures of examples 4-6 and comparative examples 4-6, respectively, being: 31.5 ℃,32.1 ℃,30.7 ℃,38.2 ℃,38.3 ℃,39.0 ℃.
Tests show that the base film for the black opaque solar cell backboard can remarkably improve the reflectivity of light and reduce the temperature of the back surface of the base film. Meanwhile, the whole body is black after being observed around the basal membrane for many times.
It should be understood by those skilled in the art that while the present application has been described in terms of several embodiments, not every embodiment contains only one independent technical solution. The description is given for clearness of understanding only, and those skilled in the art will understand the description as a whole and will recognize that the technical solutions described in the various embodiments may be combined with one another to understand the scope of the present application.
The foregoing is illustrative of the present application and is not to be construed as limiting the scope of the application. Any equivalent alterations, modifications and combinations thereof will be effected by those skilled in the art without departing from the spirit and principles of this application, and it is intended to be within the scope of the application.
Claims (3)
1. A base film for a black opaque solar cell back sheet, characterized in that the base film (10) comprises at least one layer of black base material (11) and a semi-transparent reflecting layer (12) formed on the side of the black base material (11) facing a solar cell sheet by vacuum sputtering, wherein the thickness of the semi-transparent reflecting layer (12) is 3-5 μm; the thickness of the black substrate (11) is 200-250 mu m.
2. A system for preparing a base film for a black opaque solar cell back sheet, wherein the base film (10) at least comprises a black base material (11) and a semi-transparent reflecting layer (12) formed on the side of the black base material (11) facing a solar cell sheet by vacuum sputtering, and is characterized by comprising a first mixing bin (101) for nanoparticles of FeS, graphite, carbon black and manganese dioxide and PET slices; the outlet of the first mixing bin (101) is connected with a single-screw extruder (102) for preparing black masterbatch; the outlet of the single screw extruder (102) is connected with a second mixing bin (103) for black masterbatch and PET slices; the outlet of the second mixing bin (103) is connected with a double-screw extruder (104); the outlet of the double-screw extruder (104) is connected with a film biaxial stretching mechanism (300) for stretching and preparing the black base material (11); the outlet of the film biaxial stretching mechanism (300) is connected with a vacuum sputtering device (400) for forming a semi-transparent reflecting layer (12) on one side surface of the black substrate (11).
3. The production system according to claim 2, characterized in that a target for forming the semi-reflective layer (12) is provided in the vacuum sputtering apparatus (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323150923.9U CN221125968U (en) | 2023-11-21 | 2023-11-21 | Base film for black opaque solar cell backboard and preparation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323150923.9U CN221125968U (en) | 2023-11-21 | 2023-11-21 | Base film for black opaque solar cell backboard and preparation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221125968U true CN221125968U (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323150923.9U Active CN221125968U (en) | 2023-11-21 | 2023-11-21 | Base film for black opaque solar cell backboard and preparation system |
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| Country | Link |
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