CN117070152A - Packaging adhesive film and photovoltaic module - Google Patents
Packaging adhesive film and photovoltaic module Download PDFInfo
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- CN117070152A CN117070152A CN202311026815.2A CN202311026815A CN117070152A CN 117070152 A CN117070152 A CN 117070152A CN 202311026815 A CN202311026815 A CN 202311026815A CN 117070152 A CN117070152 A CN 117070152A
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 64
- 239000002313 adhesive film Substances 0.000 title claims abstract description 63
- 229920006280 packaging film Polymers 0.000 claims abstract description 62
- 239000012785 packaging film Substances 0.000 claims abstract description 62
- 239000001055 blue pigment Substances 0.000 claims abstract description 33
- 239000001054 red pigment Substances 0.000 claims abstract description 33
- 239000001052 yellow pigment Substances 0.000 claims abstract description 33
- 229920005989 resin Polymers 0.000 claims description 54
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- 239000011521 glass Substances 0.000 claims description 6
- 229920006015 heat resistant resin Polymers 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 3
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- 239000000049 pigment Substances 0.000 abstract description 34
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- 239000010410 layer Substances 0.000 description 284
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- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 40
- 229920001577 copolymer Polymers 0.000 description 29
- 238000002834 transmittance Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 8
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 7
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 6
- MYONAGGJKCJOBT-UHFFFAOYSA-N benzimidazol-2-one Chemical compound C1=CC=CC2=NC(=O)N=C21 MYONAGGJKCJOBT-UHFFFAOYSA-N 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 239000011256 inorganic filler Substances 0.000 description 5
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- 239000002356 single layer Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 4
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 3
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 3
- 239000012860 organic pigment Substances 0.000 description 3
- YKTNISGZEGZHIS-UHFFFAOYSA-N 2-$l^{1}-oxidanyloxy-2-methylpropane Chemical group CC(C)(C)O[O] YKTNISGZEGZHIS-UHFFFAOYSA-N 0.000 description 2
- BRQMAAFGEXNUOL-UHFFFAOYSA-N 2-ethylhexyl (2-methylpropan-2-yl)oxy carbonate Chemical compound CCCCC(CC)COC(=O)OOC(C)(C)C BRQMAAFGEXNUOL-UHFFFAOYSA-N 0.000 description 2
- 239000004808 2-ethylhexylester Substances 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 2
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- -1 isopropyl tert-butylperoxycarbonate Chemical compound 0.000 description 2
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- GVBHRNIWBGTNQA-UHFFFAOYSA-N 2-methoxy-4-nitroaniline Chemical compound COC1=CC([N+]([O-])=O)=CC=C1N GVBHRNIWBGTNQA-UHFFFAOYSA-N 0.000 description 1
- OPYRETPBRCRXQU-UHFFFAOYSA-N 4,6-dihydro-1h-pyrrolo[3,2-b]pyrrol-5-one Chemical group N1C=CC2=C1CC(=O)N2 OPYRETPBRCRXQU-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 241000269913 Pseudopleuronectes americanus Species 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- 101100409194 Rattus norvegicus Ppargc1b gene Proteins 0.000 description 1
- 206010043189 Telangiectasia Diseases 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000008641 benzimidazolones Chemical group 0.000 description 1
- 230000009133 cooperative interaction Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
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- 229920006226 ethylene-acrylic acid Polymers 0.000 description 1
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- 239000001023 inorganic pigment Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
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- 239000000155 melt Substances 0.000 description 1
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- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229940067265 pigment yellow 138 Drugs 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
Abstract
The application provides a packaging adhesive film and a photovoltaic module. The packaging adhesive film comprises a first packaging film layer, an inner color layer and a second packaging film layer which are sequentially overlapped, wherein the inner color layer comprises blue pigment, yellow pigment and red pigment, the L value of the inner color layer is 10-50, the a value is-10, and the b value is-10. The packaging adhesive film can meet the requirement that the human eyes do not reflect light to the appearance of the photovoltaic module. And the color mixing of the pigment is similar to the color forming principle of three primary colors, and the whole photovoltaic module comprising the packaging adhesive film is enabled to be black through the perception of the inner color layer with the L value by a visual system. Compared with the prior art that carbon black is directly adopted as the pigment of the battery back plate, even though the photovoltaic module comprising the packaging adhesive film is black in appearance, the temperature rise caused by irradiation of sunlight is difficult.
Description
The application relates to a patent application with the patent application number of 202210013606.3, the application date of 2022, 01 month and 06 days and the name of packaging adhesive film and photovoltaic module.
Technical Field
The application relates to the technical field of photovoltaic module preparation, in particular to a packaging adhesive film and a photovoltaic module.
Background
At present, along with the popularization of photovoltaic modules, the visual sense requirement of people on the modules is more and more severe, and the traditional modules are very glaring when light is reflected by glass from the front, so that certain 'light pollution' is caused. To solve this problem, the module uses a conventional black solar cell back sheet, the principle of which is to use carbon black as a pigment, absorbing all light rays of 400 to 4000 nm. However, the temperature of the photovoltaic module is increased, and the output power of such a photovoltaic module is generally reduced by 3 to 5%.
Disclosure of Invention
The application mainly aims to provide a packaging adhesive film and a photovoltaic module, which are used for solving the problem of higher temperature of the photovoltaic module caused by light pollution of the photovoltaic module in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided an encapsulating film comprising a first encapsulating film layer, an inner color layer, and a second encapsulating film layer stacked in this order, the inner color layer comprising a blue pigment, a yellow pigment, and a red pigment, the inner color layer having an L value of 10 to 50, an a value of-10 to 10, and a b value of-10 to 10.
Further, the inner color layer is a blue color layer, a yellow color layer and a red color layer which are stacked in random order, wherein the blue color layer comprises a first resin base layer and a blue pigment dispersed in the first resin base layer, the yellow color layer comprises a second resin base layer and a yellow pigment dispersed in the second resin base layer, and the red color layer comprises a third resin base layer and a red pigment dispersed in the third resin base layer; preferably, the L value of the blue color layer is 10-50, the a value is-20, the b value is-70 to-30, the transmittance of the blue color layer to light rays with the wave band larger than 800nm is larger than 60%, the thickness of the blue color layer is 20-100 microns, and the blue pigment is 3-15 wt% of the blue color layer; preferably, the L value of the yellow color layer is 50-90, the a value is-20, the b value is 60-100, the transmittance of the yellow color layer to light rays with the wave band larger than 800nm is larger than 70%, the thickness of the yellow color layer is 10-50 microns, and the yellow pigment is 2-10 wt% of the yellow color layer; preferably, the red color layer has an L value of 30 to 70, an a value of 40 to 80, a b value of-10 to 30, a transmittance of the red color layer for light rays of more than 800nm wavelength band of more than 70%, a thickness of the red color layer of 10 to 50 micrometers, the red pigment is 1 to 5% by weight of the red color layer, preferably, the first crosslinking agent is added to each of the blue color layer, the yellow color layer and the red color layer, preferably, the pre-crosslinking degree of the inner color layer is in the range of 20 to 70%, and preferably, the thickness of the inner color layer is 100 to 180 micrometers.
Further, the thickness ratio of the blue color layer, the yellow color layer and the red color layer is 50 to 90: 30-50: 20-40.
Further, the inner color layer includes a fourth resin base layer in which red pigment, yellow pigment, blue pigment are dispersed, the total weight of the red pigment, yellow pigment, blue pigment being 3 to 30wt% of the fourth resin base layer, preferably the red pigment: yellow pigment: the weight ratio of the blue pigment is 1:1-3:1-5.
Further, the inner color layer further includes a second crosslinking agent, and the pre-crosslinking degree of the inner color layer is preferably in the range of 20 to 70%.
Further, the first packaging film layer and the second packaging film layer are respectively and independently transparent barrier layers, and the thickness ratio of the inner color layer to the transparent barrier layers is 1:1-5:1.
Further, the first packaging film layer is a transparent barrier layer, the second packaging film layer is a white high-reflection layer, preferably, the thickness ratio of the inner color layer to the transparent barrier layer is 3:1-1:3, and preferably, the thickness ratio of the inner color layer to the white high-reflection layer is 1:1-1:8.
Further, the first packaging film layer is a transparent barrier layer, the second packaging film layer is a white high-reflection layer, the white high-reflection layer comprises a heat-resistant resin layer, and the melting point of the heat-resistant resin layer is preferably 150-350 ℃.
Further, the ratio of the thickness of the inner color layer to the thickness of the transparent barrier layer is 3:1-1:3, and the ratio of the thickness of the inner color layer to the thickness of the white highly reflective layer is preferably 1:1-1:8.
According to another aspect of the present application, there is provided a photovoltaic module, including a glass sheet, an upper packaging adhesive film, a battery sheet layer, a lower packaging adhesive film, and a back plate, wherein at least one of the upper packaging adhesive film and the lower packaging adhesive film is the packaging adhesive film described above.
By applying the technical scheme of the application, the packaging adhesive film can absorb light rays with the wave band below 780nm, so that the non-reflection of visible light is realized, but the packaging adhesive film has higher light transmittance to near infrared wave bands above 780nm, and further the requirement of human eyes on the non-reflection of the appearance of the photovoltaic module is met. And the color mixing of the pigment is similar to the color forming principle of three primary colors, and the whole photovoltaic module comprising the packaging adhesive film is enabled to be black through the perception of the inner color layer with the L value by a visual system. Compared with the prior art that carbon black is directly adopted as the pigment of the battery back plate, even though the photovoltaic module comprising the packaging adhesive film is black in appearance, the temperature rise caused by irradiation of sunlight is difficult.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The present application will be described in detail with reference to examples.
As analyzed by the background art, in order to solve the problem of higher temperature of the photovoltaic module caused by 'light pollution' of the photovoltaic module in the prior art, the application provides a packaging adhesive film and the photovoltaic module.
In an exemplary embodiment of the present application, there is provided an encapsulating film comprising a first encapsulating film layer, an inner color layer, and a second encapsulating film layer stacked in this order, the inner color layer comprising a blue pigment, a yellow pigment, and a red pigment, the inner color layer having an L value of 10 to 50, an a value of-10 to 10, and a b value of-10 to 10.
The packaging adhesive film provided by the application can absorb light rays with the wave band below 780nm, so that the non-reflection of visible light is realized, but the packaging adhesive film has higher light transmittance to the near infrared wave band above 780nm, and further the requirement of human eyes on the non-reflection of the appearance of the photovoltaic module is met. And the color mixing of the pigment is similar to the color forming principle of three primary colors, and the whole photovoltaic module comprising the packaging adhesive film is enabled to be black through the perception of the inner color layer with the L value by a visual system. Compared with the prior art that carbon black is directly adopted as the pigment of the battery back plate, even though the photovoltaic module comprising the packaging adhesive film is black in appearance, the temperature rise caused by irradiation of sunlight is difficult.
In principle, the effect of making the appearance black can be achieved regardless of the form in which the red pigment, the yellow pigment, and the blue pigment are matched. Wherein the above red pigment, yellow pigment and blue pigment are each independently selected from any one or more of azo-based pigment, lake-based pigment, heterocyclic-based pigment, condensed ring ketone-based pigment, phthalocyanine-based pigment.
In some embodiments of the present application, the inner color layer is a blue color layer, a yellow color layer, and a red color layer stacked in random order, the blue color layer includes a first resin base layer and a blue pigment dispersed in the first resin base layer, the yellow color layer includes a second resin base layer and a yellow pigment dispersed in the second resin base layer, and the red color layer includes a third resin base layer and a red pigment dispersed in the third resin base layer; preferably, the L value of the blue color layer is 10-50, the a value is-20, the b value is-70 to-30, the transmittance of the blue color layer to light rays with the wave band larger than 800nm is larger than 60%, the thickness of the blue color layer is 20-100 microns, and the blue pigment is 3-15 wt% of the blue color layer; preferably, the L value of the yellow color layer is 50-90, the a value is-20, the b value is 60-100, the transmittance of the yellow color layer to light rays with the wave band larger than 800nm is larger than 70%, the thickness of the yellow color layer is 10-50 microns, and the yellow pigment is 2-10 wt% of the yellow color layer; preferably, the red color layer has an L value of 30 to 70, an a value of 40 to 80, a b value of-10 to 30, a transmittance of the red color layer to light of more than 800nm wavelength band of more than 70%, a thickness of the red color layer of 10 to 50 μm, and a red pigment of 1 to 5wt% of the red color layer.
The inner color layer of the three-layer structure formed by stacking the blue color layer, the yellow color layer and the red color layer in random sequence can absorb light rays with wave bands below 780nm as far as possible and has higher reflectivity for near infrared wave bands above 780nm, so that the power of the photovoltaic module is improved as far as possible on the basis of enabling the photovoltaic module to be black. Wherein, the preferable Blue pigment is selected from any one or more of Pasteur L6900, pasteur K6911, pasteur L6700F, L6989F, clariant A2R, clariant PV Fast Blue A4R, pasteur K6850 and Pasteur L6930; the preferred yellow pigment is selected from any one or more of clahn H3G, clahn FGL, basf K1415, azo pigment yellow 74, azo pigment yellow 81, azo pigment yellow 3, isoindolinone pigment yellow 109, isoindolinone pigment yellow 110, isoindolinone pigment yellow 139, benzimidazolone pigment yellow 151, benzimidazolone pigment yellow 154, quinophthalone pigment yellow 138; preferred Red pigments are selected from any one or more of claret D3G70, pasteur L3670HD, diketopyrrolopyrroles Pasteur Red K3840SQ, pasteur pigment L3550HD, PV Fast Red B, pv Fast HB Red, novoperm Red F5RK, quinacridone pigment Red 122, and Clariant PV Fast Pink E01, thereby further promoting synergistic coordination between the three pigments.
On the basis of the set pigment composition, the larger the thickness of the inner color layer is, the better the effect of improving the appearance of the photovoltaic module is, but the thickness of the packaging adhesive film is increased due to the arrangement of the inner color layer, and the peeling strength of the packaging adhesive film and the battery piece is also influenced, and in order to improve the effect of improving the appearance as much as possible and ensure the high peeling strength of the packaging adhesive film and the battery piece, the thickness of the inner color layer is preferably 100-180 micrometers.
In addition, the first crosslinking agent is preferably added to each of the blue color layer, the yellow color layer and the red color layer, and the pre-crosslinking degree of the inner color layer is preferably in the range of 20 to 70%, so that the uniformity is better and the problem that the influence of the flow of the packaging adhesive film on each pigment, the color of the inner color is uneven and the utilization of light is further influenced when the photovoltaic module is laminated can be well prevented. Preferably, the first crosslinking agent is selected from any one or more of isopropyl tert-butylperoxycarbonate, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, 1-bis (tert-butyl peroxy) -3, 5-trimethylcyclohexane, 2-ethylhexyl tert-butylperoxycarbonate, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane; further, it is preferably any one of 1-bis (t-butyl peroxide) -3, 5-trimethylcyclohexane, t-butylperoxycarbonate-2-ethylhexyl ester, and 2, 5-dimethyl-2, 5-di (t-butylperoxy) hexane.
Preferably, the first resin base layer, the second resin base layer, and the third resin base layer are each independently selected from any one or more of ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-acrylic acid ester copolymer, ethylene-butene copolymer, ethylene-1-hexene copolymer, ethylene-octene copolymer, ethylene-pentene copolymer, ethylene-methacrylate copolymer, polyvinyl alcohol Ding Quanzhi, and ionic copolymer, thereby improving the strength of the entire inner color layer. Preferably, the first resin base layer, the second resin base layer and the third resin base layer are each independently selected from any one or more of Han Guodao dar 282PV photovoltaic EVA resin, telangiectasia EVA resin UE2828, POE us dow ENGAGE 8452), shandong bian EVA resin UL00428, and korea EVA resin LG 28025.
The thickness ratio of the blue color layer, the yellow color layer, and the red color layer is preferably 50 to 90: 30-50: 20-40, thereby being beneficial to improving the cooperative interaction among the thickness of the blue color layer, the thickness of the yellow color layer and the red color layer.
In some embodiments of the present application, the inner color layer includes a fourth resin base layer in which red pigment, yellow pigment, blue pigment are dispersed, the total weight of the red pigment, yellow pigment, blue pigment being 3 to 30wt% of the fourth resin base layer, preferably the red pigment: yellow pigment: the weight ratio of the blue pigment is 1:1-3:1-5.
The weight ratio of each pigment in the single-layer inner color layer is adjusted within the range, so that the black appearance of the photovoltaic module can be realized as much as possible, the near infrared band with the wavelength of 780nm or more can be provided with higher reflectivity, and the power of the photovoltaic module is improved as much as possible on the basis that the photovoltaic module is enabled to be black. Wherein the fourth resin base layer is selected from any one or more of ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-acrylic ester copolymer, ethylene-butene copolymer, ethylene-1-hexene copolymer, ethylene-octene copolymer, ethylene-pentene copolymer, ethylene-methacrylic ester copolymer, polyvinyl acetal Ding Quanzhi and ionic copolymer.
The pigment used in the inner color layer with the three-layer structure can be made of different resin materials according to the dispersion effect, the pigment type is more abundant in selection, and the barrier property is better than that of a single layer.
The single-layer structure of the inner color layer is simple, but is limited by the compatibility of the pigment with the resin, and the choice of pigment type is relatively limited.
The light transmittance of the inner color layer with the three-layer structure or the inner color layer with the single-layer structure is less than 5% for light rays with 400-700 nm, and the light transmittance of the inner color layer for light rays with the wave band greater than 800nm is greater than 50%, so that the black sense comfort level of the photovoltaic module is improved, and the utilization rate of near infrared light rays is further improved.
The inner color layer further comprises a second crosslinking agent, and the pre-crosslinking degree of the inner color layer is preferably 20-70%, so that the influence of the flow of the packaging adhesive film on each pigment on the color unevenness of the inner color during lamination of the photovoltaic module is prevented, and the utilization rate of the light is further influenced. Preferably, the second crosslinking agent is selected from any one or more of isopropyl tert-butylperoxycarbonate, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane, 1-bis (tert-butyl peroxy) -3, 5-trimethylcyclohexane, 2-ethylhexyl tert-butylperoxycarbonate, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane; further, it is preferably any one of 1-bis (t-butyl peroxide) -3, 5-trimethylcyclohexane, t-butylperoxycarbonate-2-ethylhexyl ester, and 2, 5-dimethyl-2, 5-di (t-butylperoxy) hexane.
In an embodiment of the application, each of the first packaging film layer and the second packaging film layer is independently a transparent barrier layer, and a thickness ratio of the inner color layer to the transparent barrier layer is 1:1-5:1.
The transparent barrier layer can be a resin layer with high light transmittance and barrier effect on water vapor, air and large and small molecules, and can reduce the contact between the organic pigment component in the inner color layer and the battery piece and reduce the migration of the organic pigment component to the battery piece and the adsorption of the battery piece to polar substances in the hydrolysis process of the packaging adhesive film.
The packaging adhesive film with the structure above benefits from the fact that the first packaging film layer and the second packaging film layer are respectively and independently transparent barrier layers, so that the packaging adhesive film can be used for an upper packaging adhesive film (close to a glass sheet) and/or a lower packaging adhesive film (close to a back plate) of a battery sheet layer, and can enable the whole photovoltaic module to present a black appearance.
In an embodiment of the present application, the packaging film may include only an inner color layer and a packaging film layer stacked in order, and the packaging film layer may be a transparent barrier layer or a white high-reflection layer as a substrate layer of the inner color layer.
In an embodiment of the application, the first packaging film layer is a transparent barrier layer, the second packaging film layer is a white high-reflection layer, preferably, a thickness ratio of the inner color layer to the transparent barrier layer is 3:1-1:3, and preferably, a thickness ratio of the inner color layer to the white high-reflection layer is 1:1-1:8.
The white high-reflection layer is a resin layer added with high-reflection inorganic filler, and high reflection is realized on near infrared rays penetrating through the inner color layer, so that the near infrared rays penetrate through the inner color layer again and are incident on the battery piece, the photoelectric conversion efficiency of the photovoltaic module is greatly improved, and the output power of the photovoltaic module is further improved. The control of the thickness ratio of each layer is helpful to obtain the packaging adhesive film which is as thin as possible on the basis of basically playing the performances of each layer.
The packaging adhesive film can be prepared by a melt co-extrusion mode.
Of course, according to actual needs, a resin layer of inorganic or organic pigment may be added to the outer surface of the white high-reflection layer far from the battery plate, so as to realize the decoration effect on the photovoltaic module.
In one embodiment of the present application, the first packaging film layer is a transparent barrier layer, the second packaging film layer is a white highly reflective layer, and the white highly reflective layer includes a heat-resistant resin layer, preferably, the heat-resistant resin layer has a melting point of 150 ℃ to 350 ℃.
The packaging adhesive film can reduce the light pollution of the photovoltaic module, improve the photoelectric conversion efficiency of the photovoltaic module, and improve the temperature resistance of the photovoltaic module, so that the photovoltaic module comprising the packaging adhesive film has weather resistance, is suitable for being used under more severe conditions, and further expands the application scene of the photovoltaic module. Preferably, the heat-resistant resin layer is selected from one or more of PET, PBT, PC, PMMA, PI, PA, and the preparation process of the packaging adhesive film preferably comprises the steps of obtaining a co-extrusion film by melt co-extrusion of the transparent barrier layer and the inner color layer, then spraying the co-extrusion film on the white high-reflection layer in a film spraying mode, and then carrying out ultraviolet crosslinking to obtain the packaging adhesive film.
Preferably, the thickness ratio of the inner color layer to the transparent barrier layer is 3:1-1:3, and preferably, the thickness ratio of the inner color layer to the white high-reflection layer is 1:1-1:8, so that the packaging adhesive film which is as thin as possible can be obtained on the basis of exerting the excellent performance of each layer.
In another exemplary embodiment of the present application, a photovoltaic module is provided, including a glass sheet, an upper packaging film, a battery sheet layer, a lower packaging film, and a back sheet, where at least one of the upper packaging film and the lower packaging film is the packaging film described above.
The whole photovoltaic module comprising the packaging adhesive film is black. Compared with the prior art that carbon black is directly adopted as the pigment of the battery back plate, even though the photovoltaic module comprising the packaging adhesive film is black in appearance, the temperature rise caused by irradiation of sunlight is difficult.
The advantageous effects of the present application will be described below with reference to specific examples and comparative examples.
Example 1
The packaging adhesive film comprises a transparent barrier layer, an inner color layer and a white high-reflection layer which are sequentially overlapped.
The transparent barrier layer is made of ethylene-vinyl acetate copolymer (Korea Darling 282PV photovoltaic EVA resin) with thickness of 60 μm.
The blue color layer includes an ethylene-vinyl acetate copolymer (korean daer 282PV photovoltaic EVA resin) and phthalocyanine blue (basf K6911) dispersed therein, which is 7wt% of the ethylene-vinyl acetate copolymer, and has a thickness of 80 μm.
The yellow colored layer comprised an ethylene-octene copolymer (POE us dow ENGAGE 8452) and a benzimidazolone yellow (clariant H3G) dispersed therein, the benzimidazolone yellow being 5wt% of the ethylene-octene copolymer and having a thickness of 30 microns.
The red color layer comprises ethylene-vinyl acetate copolymer (Shandong's body EVA resin UL 00428) and pyrrolopyrrole dione (Craien D3G 70) dispersed therein, wherein pyrrolopyrrole dione is 3wt% of ethylene-vinyl acetate copolymer, and the thickness is 20 μm.
Sequentially stacking a blue color layer, a yellow color layer and a red color layer in order to obtain an inner color, wherein the crosslinking degree of the inner color layer is 30%, and 0.3wt% of 1-bis (tert-butyl peroxide) -3, 5-trimethylcyclohexane is added into each layer.
The thickness of the white high-reflection layer is 250 micrometers, and an ethylene-vinyl acetate copolymer (Shandong's body UL 00428) and inorganic filler titanium dioxide (DuPont R706) are selected, wherein the weight of the inorganic filler is 35wt% of that of the white high-reflection layer.
The transparent barrier layer, the inner color layer and the white high-reflection layer are formed by melt coextrusion once, and then are subjected to irradiation crosslinking by electron beams (the irradiation dose is 20kGy, and the irradiation time is 60 seconds), so that the packaging adhesive film is obtained.
Example 2
The packaging adhesive film comprises a transparent barrier layer, an inner color layer and a white high-reflection layer which are sequentially overlapped.
The transparent barrier layer is made of ethylene-vinyl acetate copolymer (Korea Darling 282PV photovoltaic EVA resin) with thickness of 60 μm.
The inner color layer is of a single-layer structure and has a thickness of 150 micrometers, the resin is selected from ethylene-octene copolymer (POE U.S. Dow ENGAGE 8452), red pigment, yellow pigment and blue pigment are blended with the resin according to a weight ratio of 1:1.5:4, the total weight of the red pigment, the yellow pigment and the blue pigment is 15wt% of the ethylene-octene copolymer, the red pigment is pyrrolopyrrolidone (Kelain D3G 70), the yellow pigment is benzimidazolone yellow (Kelain H3G) and the blue pigment is phthalocyanine blue (Basoff K6911), the inner color layer comprises 0.2wt% of 1-bis (tert-butyl peroxide) -3, 5-trimethylcyclohexane, and the crosslinking degree of the inner color layer is 30%.
The white highly reflective layer had a thickness of 250 microns and included an ethylene-vinyl acetate copolymer (Shandong Hongkong UL 00428) and titanium dioxide (DuPont R706) as an inorganic filler, the weight of the inorganic filler being 35wt% of the white highly reflective layer.
The transparent barrier layer, the inner color layer and the white high-reflection layer are formed by melt coextrusion once, and then are subjected to irradiation crosslinking by electron beams (the irradiation dose is 23kGy, and the irradiation time is 50 seconds), so that the packaging adhesive film is obtained.
Example 3
The packaging adhesive film comprises a transparent barrier layer, an inner color layer and a white high-reflection layer which are sequentially overlapped.
The transparent barrier layer is selected from ethylene-vinyl acetate copolymer (POE Dow ENGAGE 8452) with thickness of 60 μm.
The blue color layer includes an ethylene-vinyl acetate copolymer (korean daer 282PV photovoltaic EVA resin) and phthalocyanine blue (basf K6911) dispersed therein, which is 7wt% of the ethylene-vinyl acetate copolymer, and has a thickness of 80 μm.
The yellow color layer includes an ethylene-octene copolymer (korean dadel 282PV photovoltaic EVA resin) and benzimidazolone yellow (clariant H3G) dispersed therein, the benzimidazolone yellow being 5wt% of the ethylene-octene copolymer and having a thickness of 30 μm.
The red color layer comprises ethylene-vinyl acetate copolymer (Shandong's body EVA resin UL 00428) and pyrrolopyrrole dione (Craien D3G 70) dispersed therein, wherein pyrrolopyrrole dione is 3wt% of ethylene-vinyl acetate copolymer, and the thickness is 20 μm.
The blue color layer, the yellow color layer and the red color layer are sequentially overlapped to obtain an inner color, and 0.4wt% of 1-bis (tert-butyl peroxide) -3, 5-trimethylcyclohexane is respectively added into each layer, wherein the crosslinking degree of the inner color layer is 40%.
The thickness of the white high-reflection layer is 150 micrometers, and a white biaxially-oriented PET film (Sichuan Dong material DS 11) is selected, wherein the transmittance of the PET film is 5%.
The transparent barrier layer and the inner color layer are subjected to melt coextrusion to obtain a co-extrusion film, the co-extrusion film is coated on the white high-reflection layer in a film coating mode, and then irradiation crosslinking (the irradiation dose is 25kGy and the irradiation time is 60 seconds) is carried out, so that the packaging adhesive film is obtained.
Example 4
Example 4 differs from example 1 in that the thickness of the blue color layer was 100 μm, and finally a packaging film was obtained.
Example 5
Example 5 differs from example 1 in that the blue color layer has a thickness of 20 microns, and finally a packaging film is obtained.
Example 6
Example 6 differs from example 1 in that the blue color layer has a thickness of 15 μm, and finally a packaging film is obtained.
Example 7
Example 7 differs from example 1 in that the blue pigment weight was 3wt% of the ethylene-vinyl acetate copolymer, and finally an encapsulating film was obtained.
Example 8
Example 8 differs from example 1 in that the blue pigment weight was 15wt% of the ethylene-vinyl acetate copolymer, and finally an encapsulating film was obtained.
Example 9
Example 9 differs from example 1 in that the blue pigment weight was 2wt% of the ethylene-vinyl acetate copolymer, and finally an encapsulating film was obtained.
Example 10
Example 10 differs from example 1 in that the Blue pigment was clahn PV Fast Blue A4R, and finally an encapsulating film was obtained.
Example 11
Example 11 differs from example 1 in that the first resin base layer is a bench polymer chemical EVA resin UE2828, and finally the packaging adhesive film is obtained.
Example 12
Example 12 differs from example 1 in that the thickness of the yellow color layer was 50 microns, and finally a packaging film was obtained.
Example 13
Example 13 differs from example 1 in that the thickness of the yellow color layer was 10 μm, and finally a packaging film was obtained.
Example 14
Example 14 differs from example 1 in that the yellow color layer has a thickness of 8 μm, and finally a packaging film is obtained.
Example 15
Example 15 differs from example 1 in that the weight of the yellow pigment is 2% by weight of the ethylene-octene copolymer, and finally an encapsulating film was obtained.
Example 16
Example 16 differs from example 1 in that the weight of the yellow pigment is 10% by weight of the ethylene-octene copolymer, and finally an encapsulating film was obtained.
Example 17
Example 17 differs from example 1 in that the weight of the yellow pigment is 1% by weight of the ethylene-octene copolymer, and finally an encapsulating film was obtained.
Example 18
Example 18 differs from example 1 in that the yellow pigment was clahn FGL, and finally an encapsulating film was obtained.
Example 19
Example 19 differs from example 1 in that the second resin base layer is the ekamobil EVA resin UL02528, and finally the packaging film is obtained.
Example 20
Example 20 differs from example 1 in that the thickness of the red color layer was 50 microns, and finally a packaging film was obtained.
Example 21
Example 21 differs from example 1 in that the thickness of the red color layer was 10 μm, and finally a packaging film was obtained.
Example 22
Example 22 differs from example 1 in that the red color layer has a thickness of 8 microns, and finally a packaging film is obtained.
Example 23
Example 23 differs from example 1 in that the weight of the red pigment is 1wt% of the ethylene-octene copolymer, resulting in a packaging film.
Example 24
Example 24 differs from example 1 in that the weight of the red pigment is 5% by weight of the ethylene-octene copolymer, resulting in a packaging film.
Example 25
Example 25 differs from example 1 in that the weight of the red pigment is 0.5wt% of the ethylene-octene copolymer, resulting in a packaging film.
Example 26
Example 26 differs from example 1 in that the red pigment was clahn PV Fast Pink E01, and finally an encapsulating film was obtained.
Example 27
Example 27 is different from example 1 in that the third resin base layer was korean EVA resin LG28025, and finally an encapsulating film was obtained.
Example 28
Example 28 differs from example 6 in that the thickness of the transparent barrier layer is 195 microns and the thickness of the white highly reflective layer is 65 microns, resulting in a packaging film.
Example 29
Example 29 differs from example 6 in that the thickness of the transparent barrier layer was 22 microns and the thickness of the white highly reflective layer was 520 microns, and finally the packaging film was obtained.
Example 30
Example 30 differs from example 2 in that the red pigment: yellow pigment: and the weight ratio of the blue pigment is 1:1:1, and finally the packaging adhesive film is obtained.
Example 31
Example 31 differs from example 2 in that the red pigment: yellow pigment: and the weight ratio of the blue pigment is 1:3:5, and finally the packaging adhesive film is obtained.
Example 32
Example 32 differs from example 2 in that the red pigment: yellow pigment: and the weight ratio of the blue pigment is 1:0.5:5.5, and finally the packaging adhesive film is obtained.
Example 33
Example 33 is different from example 2 in that the total weight of the red pigment, the yellow pigment, and the blue pigment is 3wt% of the ethylene-octene copolymer, and finally an encapsulating film was obtained.
Example 34
Example 34 differs from example 2 in that the total weight of the red pigment, yellow pigment, blue pigment was 30wt% of the ethylene-octene copolymer, and finally an encapsulating film was obtained.
Example 35
Example 35 differs from example 2 in that the total weight of the red pigment, yellow pigment, blue pigment was 2wt% of the ethylene-octene copolymer, and finally an encapsulating film was obtained.
Example 36
Example 36 differs from example 2 in that the inner color layer comprises 0.15wt% of 1-bis (t-butyl peroxide) -3, 5-trimethylcyclohexane, the degree of crosslinking of the inner color layer is 20%, and finally an encapsulating film is obtained.
Example 37
Example 37 differs from example 2 in that the inner color layer comprises 0.6wt% of 1-bis (t-butyl peroxide) -3, 5-trimethylcyclohexane, the degree of crosslinking of the inner color layer is 70%, and finally an encapsulating film is obtained.
Example 38
Example 38 differs from example 3 in that the white highly reflective layer was defined as Zhejiang Nanyang NYS220, and the final packaging film was obtained.
Example 39
Example 39 differs from example 3 in that the blue color layer has a thickness of 20 microns, the transparent barrier layer has a thickness of 23 microns, and the white highly reflective layer has a thickness of 70 microns, to finally obtain the packaging film.
Example 40
Example 40 differs from example 3 in that the blue color layer has a thickness of 20 microns, the transparent barrier layer has a thickness of 210 microns, and the white highly reflective layer has a thickness of 560 microns, to finally obtain the packaging film.
Example 41
Example 41 differs from example 3 in that the thickness of the blue color layer was 50 microns, the thickness of the yellow color layer was 40 microns, and the thickness of the red color layer was 30 microns, and finally a packaging film was obtained.
Example 42
Example 42 differs from example 3 in that the thickness of the blue color layer was 90 microns, the thickness of the yellow color layer was 50 microns, and the thickness of the red color layer was 40 microns, and finally a packaging film was obtained.
Example 43
The difference from example 1 is that the packaging film comprises a transparent barrier layer, an inner color layer, and a transparent barrier layer which are stacked in this order.
The first encapsulant layer was similar to example 1, and the second encapsulant layer was a transparent barrier layer, and was ethylene-vinyl acetate copolymer (korean daer 282PV photovoltaic EVA resin) with a thickness of 250 μm.
Example 44
The difference from example 43 is that the encapsulating film comprises an inner color layer, a transparent barrier layer, which are stacked in this order.
The transparent barrier layer is made of ethylene-vinyl acetate copolymer (Korea Darling 282PV photovoltaic EVA resin) with thickness of 250 μm.
Comparative example 1
Conventional encapsulating films are multilayer coextruded fully transparent structures: the upper transparent barrier layer is made of ethylene-vinyl acetate copolymer (Korea Darling 282PV photovoltaic EVA resin) with thickness of 140 μm. The intermediate layer is selected from ethylene-octene copolymer (POE U.S. Dow ENGAGE 8452) with a thickness of 220 μm. The lower transparent barrier layer is made of ethylene-vinyl acetate copolymer (Shandong Hongdong EVA resin UL 00428) with thickness of 140 μm.
The photovoltaic module was obtained by laminating a glass sheet, an upper packaging film, a battery sheet layer, a lower packaging film, and a back sheet, wherein the lower packaging film is the packaging film of examples 1 to 44 and comparative example 1, respectively. Wherein the back sheet of the photovoltaic module corresponding to comparative example 1 was a black back sheet containing carbon black. The battery piece selects a p-type Perc double-sided battery piece with the size of 182mm, and a half piece 72 piece model is adopted for packaging the photovoltaic module.
The above photovoltaic modules are all black in appearance.
Referring to IEC61215 standard of photovoltaic modules for ground-design identification and setting, PROFITET (PV 1500) manufactured by Shenzhen Maodi electro mechanical device Co., ltd.) was used to test the power of each photovoltaic module, the reflectance (800-1500 nm) of the encapsulation film, and the test results and Lab values of the inner color layer were listed in Table 1.
TABLE 1
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From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
the packaging adhesive film provided by the application can absorb light rays with the wave band below 780nm, so that the non-reflection of visible light is realized, but the packaging adhesive film has higher light transmittance to the near infrared wave band above 780nm, and further the requirement of human eyes on the non-reflection of the appearance of the photovoltaic module is met. And the color mixing of the pigment is similar to the color forming principle of three primary colors, and the whole photovoltaic module comprising the packaging adhesive film is enabled to be black through the perception of the inner color layer with the L value by a visual system. Compared with the prior art that carbon black is directly adopted as the pigment of the battery back plate, even though the photovoltaic module comprising the packaging adhesive film is black in appearance, the temperature rise caused by irradiation of sunlight is difficult.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The packaging adhesive film is characterized by comprising a first packaging film layer, an inner color layer and a second packaging film layer which are sequentially overlapped, wherein the inner color layer comprises blue pigment, yellow pigment and red pigment, the L value of the inner color layer is 10-50, the a value is-10, and the b value is-10;
the inner color layer comprises a fourth resin base layer, wherein the red pigment, the yellow pigment and the blue pigment are dispersed in the fourth resin base layer, and the total weight of the red pigment, the yellow pigment and the blue pigment is 3-30wt% of the fourth resin base layer.
2. The encapsulating film of claim 1 wherein the red pigment: the yellow pigment: the weight ratio of the blue pigment is 1:1-3:1-5.
3. The packaging film according to claim 2, wherein the inner color layer further comprises a second crosslinking agent, preferably the pre-crosslinking degree of the inner color layer is in the range of 20-70%.
4. The packaging film according to any one of claims 1 to 3, wherein the first packaging film layer and the second packaging film layer are each independently a transparent barrier layer, and the thickness ratio of the inner color layer to the transparent barrier layer is 1:1 to 5:1.
5. A packaging film according to any one of claims 1 to 3, wherein the first packaging film layer is a transparent barrier layer and the second packaging film layer is a white highly reflective layer, preferably the thickness ratio of the inner color layer to the transparent barrier layer is 3:1 to 1:3, preferably the thickness ratio of the inner color layer to the white highly reflective layer is 1:1 to 1:8.
6. A packaging film according to any one of claims 1 to 3, wherein the first packaging film layer is a transparent barrier layer and the second packaging film layer is a white highly reflective layer comprising a heat resistant resin layer, preferably having a melting point of 150 ℃ to 350 ℃.
7. The packaging film according to claim 6, wherein the ratio of the thickness of the inner color layer to the thickness of the transparent barrier layer is 3:1-1:3, preferably the ratio of the thickness of the inner color layer to the thickness of the white highly reflective layer is 1:1-1:8.
8. A photovoltaic module comprising a glass sheet, an upper packaging adhesive film, a battery sheet layer, a lower packaging adhesive film and a back plate, wherein at least one of the upper packaging adhesive film and the lower packaging adhesive film is the packaging adhesive film of any one of claims 1 to 7.
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