CN118693180A - Photovoltaic thin film plate, preparation process thereof and light photovoltaic module - Google Patents
Photovoltaic thin film plate, preparation process thereof and light photovoltaic module Download PDFInfo
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- CN118693180A CN118693180A CN202411032849.7A CN202411032849A CN118693180A CN 118693180 A CN118693180 A CN 118693180A CN 202411032849 A CN202411032849 A CN 202411032849A CN 118693180 A CN118693180 A CN 118693180A
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- 239000010409 thin film Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000005187 foaming Methods 0.000 claims abstract description 92
- 239000010408 film Substances 0.000 claims abstract description 89
- 229920002799 BoPET Polymers 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 44
- 239000011241 protective layer Substances 0.000 claims abstract description 38
- 239000012790 adhesive layer Substances 0.000 claims abstract description 34
- 229920000728 polyester Polymers 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 26
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- 239000010410 layer Substances 0.000 claims abstract description 24
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims description 33
- 229920002050 silicone resin Polymers 0.000 claims description 33
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 18
- 229910052710 silicon Inorganic materials 0.000 claims description 18
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- 239000000758 substrate Substances 0.000 claims description 15
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- 239000012530 fluid Substances 0.000 claims description 12
- 239000002667 nucleating agent Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000004014 plasticizer Substances 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
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- 238000006243 chemical reaction Methods 0.000 abstract description 10
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- Photovoltaic Devices (AREA)
Abstract
The invention relates to the technical field of photovoltaic panels, and discloses a photovoltaic thin film panel, a preparation process thereof and a light photovoltaic module. The photovoltaic film plate comprises: comprising a critical foaming base film; the inner surface of the critical foaming base film is provided with an organosilicon modified polyester inner bonding layer for bonding a packaging adhesive layer of the photovoltaic module, and the outer surface of the critical foaming base film is also provided with an organosilicon resin protective layer contacting with external air; the critical foaming base film is a critical foaming PET film material, and a plurality of gas bubbles with the size of micron order are distributed in the critical foaming PET film material. The photovoltaic film plate has the advantages of good interlayer bonding performance, light weight, high light reflectivity, no fluorine, more environmental protection, better scratch resistance, weather resistance, anti-fouling performance and breathing performance, and the improvement of the anti-fouling effect is also beneficial to keeping the long-term better breathing performance, is beneficial to reducing the working temperature of the photovoltaic module stably for a long time, and can effectively improve the photoelectric conversion efficiency and the service life of the light photovoltaic module.
Description
Technical Field
The invention relates to the technical field of photovoltaic panels, in particular to a photovoltaic thin film panel, a preparation process thereof and a light photovoltaic module.
Background
The structure of the traditional photovoltaic module is a layered structure, and a photovoltaic front plate (such as photovoltaic glass), a first packaging adhesive layer, a photovoltaic cell, a second packaging adhesive layer and a photovoltaic back plate (such as photovoltaic glass) are generally heated and laminated to form the photovoltaic module. To reduce the weight of the photovoltaic module, researchers have conceived using organic sheets instead of photovoltaic glass. Moreover, in order to further reduce the cost of the photovoltaic back sheet (such as an organic coating type photovoltaic back sheet containing a white coating layer), researchers have also conceived to further reduce the white coating layer thickness of the organic coating type photovoltaic back sheet, but this may result in a decrease in the light reflectivity of the photovoltaic back sheet, resulting in that part of sunlight cannot be reflected back to the photovoltaic cell and is effectively absorbed and utilized by the photovoltaic cell, thus being unfavorable for the improvement of the photoelectric conversion efficiency of the photovoltaic module.
Based on this, in the prior art, as CN107611203B, there is provided a high-performance solar cell back sheet, and a manufacturing method and an assembly thereof, wherein the solar cell back sheet comprises a substrate and functional coatings disposed on both sides (air side and EVA side) of the substrate, the materials of the functional coatings are weather-resistant materials, and the functional coatings and the foamed PET substrate are bonded by chemical bonds, hydrogen bonds or van der waals forces to ensure interlayer adhesion and cohesive properties; the substrate is a highly reflective foamed PET substrate to ensure high light reflectivity.
However, the existing solar cell backboard is poor in scratch resistance and pollution resistance, and is unfavorable for further improving the photoelectric conversion efficiency and the service life of the photovoltaic module. Moreover, the generated energy of the photovoltaic module and the temperature of the photovoltaic module are closely related. While developers have demonstrated that the temperature of photovoltaic modules using organic photovoltaic back sheets is lower than the temperature of photovoltaic modules using photovoltaic glass; but the temperature of the photovoltaic module is high and low, which is largely related to the respiration of the photovoltaic module and the photovoltaic backboard. The existing solar cell backboard has to be improved in respiratory performance, especially has poor stain resistance and long-term respiratory performance, is difficult to play a good long-term stable heat dissipation effect, and is not beneficial to further improving the photoelectric conversion efficiency and the service life of the photovoltaic module.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a photovoltaic thin film plate, a preparation process thereof and a light photovoltaic module.
Based on the above, the invention discloses a photovoltaic thin film plate, which comprises a critical foaming base film; the inner surface of the critical foaming base film is provided with an organosilicon modified polyester inner bonding layer for bonding a packaging adhesive layer of the photovoltaic module, and the outer surface of the critical foaming base film is also provided with an organosilicon resin protective layer contacting with external air;
The critical foaming base film is a critical foaming PET film material, and a plurality of gas bubbles with the size of micron order are distributed in the critical foaming PET film material.
Preferably, the critical foaming PET film material is prepared by a PET base material through a supercritical fluid mould pressing foaming technology, and the size of bubble holes in the critical foaming PET film material is 10-30 mu m;
the thickness of the critical foaming PET film material is 150-1000 mu m.
Further preferably, the silicone resin protective layer is a white self-cleaning silicone resin coating;
The thickness of the organic silicon resin protective layer is 6-20 mu m.
Preferably, the silicone resin protective layer adopts low molecular weight silicone resin, and the molecular weight of the low molecular weight silicone resin is 1500-5000.
Preferably, the inner bonding layer of the organosilicon modified polyester is a white organosilicon modified polyester coating;
The thickness of the bonding layer in the organosilicon modified polyester is 4-15 mu m.
Preferably, the photovoltaic film board further comprises a substrate layer arranged between the organosilicon modified polyester inner bonding layer and the critical foaming base film;
The substrate layer is a PET substrate film, and the thickness of the substrate layer is less than or equal to 200 mu m; and the sum of the thicknesses of the PET base film and the critical foaming base film is more than or equal to 280 mu m.
The invention also discloses a preparation process of the photovoltaic thin film plate, which comprises the following process steps:
Step S1, PET particles, an ultraviolet absorber, a stabilizer, a plasticizer and a nucleating agent are mixed according to the mass ratio of 92-97:0.4:0.3:0.5:1-3, mixing and drying to obtain mixed particles; then, melting, mixing and extruding the mixed particles to obtain a PET sheet; putting the PET sheet into an autoclave of a foaming machine, introducing foaming fluid, and foaming for a period of time under the conditions of heating and pressurizing to obtain a critical foaming PET film;
And S2, respectively coating the inner surface and the outer surface of the critical foaming PET film material to form an organosilicon modified polyester inner bonding layer and an organosilicon resin protective layer.
Preferably, in step S1, the foaming process conditions include: the heating temperature is 210-255 ℃, the foaming fluid is nitrogen, the pressure of the foaming fluid is 9-15Mpa, and the foaming time is 10-50min.
Preferably, in step S1, the ultraviolet absorber is ultraviolet absorber UV400, the stabilizer is basf antioxidant 168, the plasticizer is N493, and the nucleating agent is polyamide nucleating agent Cav102.
The invention also discloses a light photovoltaic module, which comprises a photovoltaic front plate, a first packaging adhesive layer, a photovoltaic cell, a second packaging adhesive layer and a photovoltaic backboard, wherein the photovoltaic front plate, the first packaging adhesive layer, the photovoltaic cell, the second packaging adhesive layer and the photovoltaic backboard are sequentially arranged from top to bottom, and the photovoltaic front plate and/or the photovoltaic backboard is the photovoltaic film board according to any one of the 1-6.
Compared with the prior art, the invention at least comprises the following beneficial effects:
The photovoltaic film board is prepared by matching an organosilicon modified polyester inner adhesive layer, a critical foaming base film (namely a critical foaming PET film material) and an organosilicon resin protective layer: (1) The adhesion and the bonding performance among the layers of the photovoltaic film plate can be improved, the overall structure is more stable, the photovoltaic film plate is free of fluorine and more environment-friendly, and the organic silicon resin protective layer can also endow the photovoltaic film plate with excellent scratch resistance, weather resistance and anti-fouling performance; in addition, under the condition that the film thickness of the photovoltaic panel is the same, the photovoltaic film panel also has better respiration after being introduced into the critical foaming PET film material, thereby being beneficial to heat dissipation, the improvement of the anti-fouling effect is also beneficial to keeping the long-term better respiration, and the cooperation of the critical foaming PET film material and the organic silicon resin protective layer is beneficial to reducing the working temperature of the photovoltaic module stably for a long time; therefore, the photovoltaic film plate is beneficial to further improving the photoelectric conversion efficiency and the service life of the photovoltaic module. (2) the weight of the photovoltaic film plate can be greatly reduced; the photovoltaic film plate has higher light reflectivity after being introduced into the critical foaming PET film material, can reflect sunlight back to the photovoltaic cell again, and improves the light absorption and light utilization rate of the photovoltaic cell while reducing the coating such as an organic silicon resin protective layer and the like and reducing the coating cost; therefore, the photovoltaic film plate is applied to the light photovoltaic module, and the photoelectric conversion efficiency and the service life of the photovoltaic module can be effectively improved.
Drawings
Fig. 1 is a schematic diagram of a screenshot structure of a lightweight photovoltaic module according to this embodiment.
Fig. 2 is a schematic diagram of a screenshot structure of a photovoltaic thin film sheet in this embodiment.
Fig. 3 is a schematic diagram of a screenshot of another photovoltaic thin film sheet of this embodiment.
Reference numerals illustrate: a photovoltaic front panel 1; a first encapsulation adhesive layer 2; a photovoltaic cell 3; a second encapsulation adhesive layer 4; a photovoltaic backsheet 5; an organosilicon modified polyester inner adhesive layer 6; a base material layer 7; a critical foaming base film 8; and a silicone resin protective layer 9.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Examples
Referring to fig. 1, a photovoltaic module of the present embodiment includes a photovoltaic front plate 1, a first encapsulation adhesive layer 2, a photovoltaic cell 3, a second encapsulation adhesive layer 4 and a photovoltaic back plate 5, which are sequentially stacked from top to bottom. The photovoltaic module is preferably a lightweight photovoltaic module.
In this embodiment, the photovoltaic cell 3 comprises a plurality of cells connected in series and/or parallel. The photovoltaic front panel 1, the first encapsulation glue layer 2 and the second encapsulation glue layer 4 are referred to the prior art and are not repeated. And the photovoltaic front sheet 1 and/or the photovoltaic back sheet 5 are a photovoltaic thin film sheet as described below in this embodiment.
The photovoltaic thin film board of the embodiment, see fig. 2-3, comprises an organosilicon modified polyester inner bonding layer 6, a critical foaming base film 8 and an organosilicon resin protective layer 9 which are sequentially laminated from inside to outside. The inner surface of the photovoltaic film plate is the surface close to the photovoltaic cell 3 and the packaging adhesive layer, and the outer surface is the surface contacting the outside air.
In this embodiment, the silicone modified polyester inner adhesive layer 6 is adjacent to the photovoltaic cell 3. Moreover, when the photovoltaic film sheet is used as the photovoltaic backsheet 5, the silicone modified polyester inner adhesive layer 6 is adhered to the lower surface of the photovoltaic cell 3 (i.e., the backlight surface of the photovoltaic cell 3) through the second encapsulating adhesive layer 4; or, when the photovoltaic film sheet is used as the photovoltaic front panel 1, the silicone modified polyester inner adhesive layer 6 is adhered to the upper surface of the photovoltaic cell 3 (i.e., the light receiving surface of the photovoltaic cell 3) through the first encapsulation adhesive layer 2.
In this embodiment, the silicone resin protective layer 9 is far away from the photovoltaic cell 3, and the silicone resin protective layer 9 contacts with the outside air, and the silicone resin protective layer 9 is used for protecting the critical foaming base film 8, the silicone modified polyester inner adhesive layer 6 and the whole photovoltaic module, so as to prevent the photovoltaic thin film plate and the inside of the photovoltaic module from being affected by the outside air or the outside environment.
The organic silicon resin protective layer 9 has excellent adhesive force and weather resistance, high hardness and hydrophobic and self-cleaning performance because of adopting organic silicon resin; therefore, the organic silicon resin protective layer 9 is arranged on the air surface of the photovoltaic film plate, so that the adhesion performance of the organic silicon resin protective layer 9 and the critical foaming base film 8 can be improved, the weather resistance and scratch resistance of the photovoltaic film plate can be improved, the photovoltaic film plate has good anti-fouling effect, and the outer surface of the whole photovoltaic film plate is prevented from being polluted.
The thickness of the silicone resin protective layer 9 is 6 to 20 μm, preferably 8 to 14 μm (e.g., 10 μm). The thickness of the silicone resin protective layer 9 is optimized to ensure good adhesion, weather resistance and self-cleaning properties of the silicone resin protective layer 9 while saving costs.
Further, the silicone resin protective layer 9 employs a low molecular weight silicone resin having a molecular weight of 1500 to 5000 (preferably 2000 to 3000). This is because an excessively large molecular weight of the silicone resin will result in poor adhesion of the silicone resin protective layer 9 to the critically foamed base film 8. Therefore, the silicone resin protective layer 9 adopts low molecular weight silicone resin, which not only ensures that the silicone resin protective layer 9 coated on the outer surface of the critical foaming base film 8 can be quickly dried and molded, but also ensures that the silicone resin protective layer 9 has excellent adhesion performance with the critical foaming base film 8.
Further, in order to provide the silicone resin protective layer 9 with high light reflectivity, the silicone resin protective layer 9 is preferably a white self-cleaning silicone resin coating. Specifically, the white self-cleaning silicone resin coating is formed by mixing silicone resin and titanium pigment and then coating the mixture on the outer surface of the critical foaming base film 8. The white self-cleaning organic silicon resin coating can improve the light reflectivity of the photovoltaic thin film plate, so that sunlight can be reflected back to the photovoltaic cell 3 through the photovoltaic thin film plate, the light absorption and light utilization rate of the photovoltaic cell 3 are improved, and the photoelectric conversion efficiency of the photovoltaic module can be improved.
Wherein, the critical foaming base film 8 is a critical foaming PET film material. The critical foaming PET film material is prepared by a PET base material through a supercritical fluid mould pressing foaming technology. Specifically, the preparation method of the critical foaming PET film material comprises the following preparation steps in sequence:
and step 1, mixing PET particles with an ultraviolet absorber, a stabilizer, a plasticizer and a nucleating agent according to a certain proportion, and drying to obtain mixed particles.
And 2, melting, mixing and extruding the mixed particles by using a double-screw extruder to obtain the PET sheet.
And step 3, placing the PET sheet into an autoclave of a foaming machine, introducing foaming fluid, and foaming for a period of time under the conditions of heating and pressurizing to obtain the critical foaming PET film.
In the step 1, the mass ratio of PET particles, an ultraviolet absorber, a stabilizer, a plasticizer and a nucleating agent is 92-97:0.4:0.3:0.5:1-3 (preferably 95.8:0.4:0.3:0.5:3 in this embodiment). The ultraviolet absorber is preferably ultraviolet absorber UV400, the stabilizer is preferably Basoff antioxidant 168, the plasticizer is preferably N493, and the nucleating agent is preferably polyamide nucleating agent Cav102.
In step 3, the foaming process conditions include: the heating temperature is 210-255 deg.C (preferably 230 deg.C), the foaming fluid is nitrogen, the pressure of the foaming fluid is 9-15Mpa (preferably 11 Mpa), and the foaming time is 10-50min (preferably 30 min).
Further, the thickness of the critical foaming PET film material is 150-1000 mu m (preferably 280 mu m), and a plurality of gas bubbles with the size of micron order size are distributed in the critical foaming PET film material. Specifically, the size of the bubble holes in the critical foaming PET film material is 10-30 μm (such as10 μm).
Compared with the conventional foaming PET film material, the critical foaming PET film material has more uniform bubble hole distribution, smaller bubble hole size and more uniform bubble hole size, and can greatly reduce the weight of the photovoltaic film plate and the photovoltaic module. Moreover, compared with the conventional foaming PET film material, the micro-sized bubble holes can enable the critical foaming PET film material to have stronger light diffuse reflection effect, and are more beneficial to reflecting sunlight back to the photovoltaic cell 3; therefore, the photovoltaic film board of the embodiment introduces the critical foaming PET film material, so that the high light reflectivity of the photovoltaic film board is further improved, meanwhile, the white self-cleaning organic silicon resin coating and the like can be thinned, and the cost of the photovoltaic film board is reduced.
In addition, compared with the conventional foaming PET film material, the critical foaming PET film material can enlarge the respiration of the photovoltaic film plate and the photovoltaic module, is more beneficial to heat dissipation, can effectively reduce the working temperature of the photovoltaic module, and improves the generated energy of the photovoltaic module. This is because: the micron-sized air holes in the critical foaming PET film can store a proper amount of water vapor well, so that the water vapor in the air holes of the critical foaming PET film volatilizes outwards when the photovoltaic module generates heat during power generation, the temperature of the photovoltaic module is reduced, and the power generation capacity of the photovoltaic module is improved. In the conventional foaming PET film material, when the bubble holes are too large, the water vapor quantity in the bubble holes is too large, so that the water vapor barrier property of the photovoltaic film plate can be reduced, the interlayer bonding strength of the photovoltaic film plate and the photovoltaic module is affected, and the service life is shortened; and when the bubble holes are too small, water vapor is difficult to store in the bubble holes, and the effects of heat dissipation and temperature reduction are difficult to achieve.
Wherein the thickness of the silicone-modified polyester inner adhesive layer 6 is 4-15 μm, preferably 6-10 μm (e.g., 8 μm). The silicone modified polyester inner adhesive layer 6 can provide good adhesive performance with the second packaging adhesive layer 4 (such as EVA packaging adhesive layer) so as to improve interlayer peeling strength.
Further, the inner adhesive layer 6 of the organosilicon modified polyester is preferably a white organosilicon modified polyester coating, so as to further improve the light reflectivity of the photovoltaic film plate, further improve the light absorption and light utilization rate of the photovoltaic cell 3, and further improve the photoelectric conversion efficiency of the photovoltaic module. Specifically, the white organosilicon modified polyester coating is formed by mixing organosilicon modified polyester resin and titanium pigment and then coating the mixture on the inner surface of the critical foaming base film 8.
In order to further improve the mechanical properties of the photovoltaic thin film plate and the supporting function of the photovoltaic module, a substrate layer 7 (shown in fig. 3) can be additionally arranged between the organosilicon modified polyester inner adhesive layer 6 and the critical foaming base film 8. The substrate layer 7 is preferably a PET base film, the thickness of which is less than or equal to 200 μm (e.g. 50 μm), and the sum of the thickness of the critical foaming base film 8 (critical foaming PET film material) and the thickness of the PET base film is more than or equal to 280 μm, so as to ensure that the photovoltaic film board has better mechanical strength.
The preparation process of the photovoltaic thin film plate comprises the following process steps:
step one, preparing the critical foaming PET film material by adopting the steps 1-3 in the embodiment.
And secondly, respectively coating and forming an organosilicon modified polyester inner bonding layer 6 and an organosilicon resin protective layer 9 on the inner surface and the outer surface of the critical foaming PET film material to obtain the photovoltaic film board of the embodiment.
When the inner adhesive layer 6 of the organic silicon modified polyester is a transparent organic silicon modified polyester coating and the organic silicon resin protective layer 9 is a transparent self-cleaning organic silicon resin coating, the photovoltaic thin film plate can also be used as the photovoltaic front plate 1 to be applied to light photovoltaic modules.
In summary, the photovoltaic film sheet of this embodiment is prepared by blending the above-mentioned silicone modified polyester inner adhesive layer 6 (preferably a white silicone modified polyester coating), critical foaming base film 8 (i.e. critical foaming PET film material), and silicone resin protective layer 9 (preferably a white self-cleaning silicone resin coating): (1) The adhesion and the bonding performance among the layers of the photovoltaic film plate can be improved, the overall structure is more stable, the photovoltaic film plate is free of fluorine and more environment-friendly, and the organic silicon resin protective layer 9 can also endow the photovoltaic film plate with excellent scratch resistance, weather resistance and anti-fouling performance; in addition, under the condition that the film thickness of the photovoltaic panel is the same, the photovoltaic film panel also has better respiration after being introduced into the critical foaming PET film material, thereby being beneficial to heat dissipation, and the improvement of the anti-fouling effect is also beneficial to keeping the long-term better respiration, so the cooperation of the critical foaming PET film material and the organic silicon resin protective layer 9 is beneficial to the long-term stable reduction of the working temperature of the photovoltaic module; therefore, the photovoltaic film plate is beneficial to further improving the photoelectric conversion efficiency and the service life of the photovoltaic module. (2) the weight of the photovoltaic film plate can be greatly reduced; the photovoltaic film plate has high light reflectivity while thinning the coating such as a white self-cleaning organic silicon resin coating and the like and reducing the cost of the coating, and can reflect sunlight back to the photovoltaic cell 3 again, so that the light absorption and light utilization rate of the photovoltaic cell 3 are improved; therefore, the photovoltaic film plate is applied to the light photovoltaic module, and the photoelectric conversion efficiency and the service life of the photovoltaic module can be effectively improved.
Performance testing
The following performance tests were performed on the photovoltaic thin film panels and photovoltaic modules of this example and the existing samples 1 to 3, and the test structures are shown in table 1 below.
Compared with the photovoltaic film sheet material of the embodiment, the photovoltaic film sheet materials of the prior samples 1 to 3 are different as follows:
The photovoltaic film sheet of the existing sample 1 does not contain a foamed PET film (instead of a conventional PET film), and does not contain a white self-cleaning silicone resin coating (instead of a conventional fluorocarbon resin coating). The photovoltaic film sheet of the existing sample 2 does not contain a foamed PET film (but is replaced with a conventional PET film). The photovoltaic film panel of the existing sample 3 contained a foamed PET film without a white self-cleaning silicone resin coating (instead of the conventional fluorocarbon resin coating).
TABLE 1
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the invention.
The foregoing has outlined rather broadly the more detailed description of the invention in order that the detailed description of the invention that follows may be better understood, and in order that the present principles and embodiments may be better understood; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (10)
1. The photovoltaic film plate is characterized by comprising a critical foaming base film; the inner surface of the critical foaming base film is provided with an organosilicon modified polyester inner bonding layer for bonding a packaging adhesive layer of the photovoltaic module, and the outer surface of the critical foaming base film is also provided with an organosilicon resin protective layer contacting with external air;
The critical foaming base film is a critical foaming PET film material, and a plurality of gas bubbles with the size of micron order are distributed in the critical foaming PET film material.
2. The photovoltaic film board of claim 1, wherein the critical foaming PET film is prepared from PET base material by supercritical fluid mould pressing foaming technology, and the size of air bubble holes in the critical foaming PET film is 10-30 μm;
the thickness of the critical foaming PET film material is 150-1000 mu m.
3. A photovoltaic film panel according to claim 1 or 2, wherein the silicone resin protective layer is a white self-cleaning silicone resin coating;
The thickness of the organic silicon resin protective layer is 6-20 mu m.
4. The photovoltaic film panel of claim 1, wherein the silicone resin protective layer is a low molecular weight silicone resin having a molecular weight of 1500-5000.
5. The photovoltaic film panel of claim 1, wherein the silicone-modified polyester inner adhesive layer is a white silicone-modified polyester coating;
The thickness of the bonding layer in the organosilicon modified polyester is 4-15 mu m.
6. The photovoltaic film panel of claim 1, further comprising a substrate layer disposed between the silicone modified polyester inner adhesive layer and the critically foamed base film;
The substrate layer is a PET substrate film, and the thickness of the substrate layer is less than or equal to 200 mu m; and the sum of the thicknesses of the PET base film and the critical foaming base film is more than or equal to 280 mu m.
7. A process for the preparation of a photovoltaic film sheet as claimed in any one of claims 1 to 6, characterized in that it comprises the following process steps:
Step S1, PET particles, an ultraviolet absorber, a stabilizer, a plasticizer and a nucleating agent are mixed according to the mass ratio of 92-97:0.4:0.3:0.5:1-3, mixing and drying to obtain mixed particles; then, melting, mixing and extruding the mixed particles to obtain a PET sheet; putting the PET sheet into an autoclave of a foaming machine, introducing foaming fluid, and foaming for a period of time under the conditions of heating and pressurizing to obtain a critical foaming PET film;
And S2, respectively coating the inner surface and the outer surface of the critical foaming PET film material to form an organosilicon modified polyester inner bonding layer and an organosilicon resin protective layer.
8. The process for preparing a photovoltaic thin film panel according to claim 7, wherein in step S1, the foaming process conditions include: the heating temperature is 210-255 ℃, the foaming fluid is nitrogen, the pressure of the foaming fluid is 9-15Mpa, and the foaming time is 10-50min.
9. The process for preparing a photovoltaic thin film sheet according to claim 7, wherein in step S1, the ultraviolet absorber is an ultraviolet absorber UV400, the stabilizer is basf antioxidant 168, the plasticizer is N493, and the nucleating agent is a polyamide nucleating agent Cav102.
10. A lightweight photovoltaic module comprising a photovoltaic front plate, a first packaging adhesive layer, a photovoltaic cell, a second packaging adhesive layer and a photovoltaic back plate which are sequentially laminated from top to bottom, wherein the photovoltaic front plate and/or the photovoltaic back plate is a photovoltaic thin film plate according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411032849.7A CN118693180A (en) | 2024-07-30 | 2024-07-30 | Photovoltaic thin film plate, preparation process thereof and light photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411032849.7A CN118693180A (en) | 2024-07-30 | 2024-07-30 | Photovoltaic thin film plate, preparation process thereof and light photovoltaic module |
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| Publication Number | Publication Date |
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| CN118693180A true CN118693180A (en) | 2024-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411032849.7A Pending CN118693180A (en) | 2024-07-30 | 2024-07-30 | Photovoltaic thin film plate, preparation process thereof and light photovoltaic module |
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| Country | Link |
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| CN (1) | CN118693180A (en) |
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- 2024-07-30 CN CN202411032849.7A patent/CN118693180A/en active Pending
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