WO2016060163A1 - Feuille de protection arrière pour modules solaires, module solaire et procédé de fabrication de feuille de protection arrière pour modules solaires - Google Patents

Feuille de protection arrière pour modules solaires, module solaire et procédé de fabrication de feuille de protection arrière pour modules solaires Download PDF

Info

Publication number
WO2016060163A1
WO2016060163A1 PCT/JP2015/079036 JP2015079036W WO2016060163A1 WO 2016060163 A1 WO2016060163 A1 WO 2016060163A1 JP 2015079036 W JP2015079036 W JP 2015079036W WO 2016060163 A1 WO2016060163 A1 WO 2016060163A1
Authority
WO
WIPO (PCT)
Prior art keywords
solar cell
vinylidene fluoride
back surface
resin film
cell module
Prior art date
Application number
PCT/JP2015/079036
Other languages
English (en)
Japanese (ja)
Inventor
辰則 隅野
智夫 齋藤
康次 中島
Original Assignee
デンカ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by デンカ株式会社 filed Critical デンカ株式会社
Priority to CN201580055523.9A priority Critical patent/CN106796967A/zh
Priority to JP2016554099A priority patent/JPWO2016060163A1/ja
Publication of WO2016060163A1 publication Critical patent/WO2016060163A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • 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

Definitions

  • the present invention relates to a back surface protection sheet for a solar cell module, a solar cell module using the back surface protection sheet, and a method for producing a back surface protection sheet for a solar cell module.
  • this technique is related with the performance improvement technique of the back surface protection sheet for solar cell modules using vinylidene fluoride resin.
  • a solar cell module generally includes a surface-side transparent protective member such as a glass substrate, an ethylene-vinyl acetate copolymer (EVA) film serving as a sealing film, a silicon power generation element, an EVA film serving as a sealing film, After the back surface protection sheet is laminated in this order, the EVA film is heated and melted to be crosslinked and cured to be integrated.
  • EVA ethylene-vinyl acetate copolymer
  • the solar cell module since the solar cell module is mainly used outdoors, its structure and material structure are required to have sufficient durability and weather resistance. In addition, if the filler is peeled off, discolored, or corroded due to moisture permeation, the module output itself may be affected. In addition, the water vapor transmission rate is small and the moisture barrier property is required to be excellent.
  • Examples of the solar cell backsheet used at that time include a laminate of an aluminum foil and a resin film, and a laminate of a plurality of resin films having different compositions (see, for example, Patent Documents 1 and 2). ).
  • Patent Document 1 proposes an integrated back sheet in which a film in which an inorganic oxide coating film is formed as a moisture-proof film on a fluororesin film is laminated with an ethylene-vinyl acetate copolymer adhesive. Moreover, in the back surface protection sheet for solar cell modules described in Patent Document 2, a coloring additive, an ultraviolet absorber, and a light stabilizer are provided on both surfaces of a base film provided with an inorganic oxide vapor-deposited film as a moisture-proof function. A heat-resistant polypropylene-based resin film containing is laminated.
  • the PID phenomenon is an output reduction phenomenon confirmed in a high voltage photovoltaic power generation system such as a mega solar.
  • studies have been made by improving electric circuits and sealing materials, but sufficient results have not been obtained.
  • the present invention intends to provide a solar cell module back surface protection sheet, a solar cell module, and a method for manufacturing the solar cell module back surface protection sheet that can suppress performance degradation due to the PID phenomenon.
  • the PID phenomenon occurs through the following steps. First, when external factors such as humidity and temperature are applied under the condition that a large potential difference occurs between the grounded frame and the module internal circuit, the insulation resistance inside the module decreases, and the internal circuit and the frame and the adhering water Leakage current is generated between the glass that has the same potential as the frame due to the influence of. Next, after Na + ions contained in the glass are eluted and move to the cell side, they are paired with electrons to be stabilized, resulting in a decrease in output.
  • the present inventor has paid attention to a back surface protection sheet that has not been studied in the past, and as a result of extensive studies, has placed a vinylidene fluoride resin film having a concavo-convex shape on the outermost layer, so By setting the ratio (Rz / S) of the point average roughness Rz and the ten-point average roughness Rz to the average interval S of the local peaks (Rz / S) in a specific range, the sun is excellent in water repellency and can suppress performance deterioration due to the PID phenomenon. It discovered that a battery back surface protection sheet was realizable, and came to this invention.
  • the back surface protective sheet for a solar cell module according to the present invention is a back surface protective sheet for a solar cell module in which a vinylidene fluoride resin film is disposed in the outermost layer, and the surface of the outermost layer is JIS B0601-1994.
  • the specified 10-point average roughness Rz is 5 to 100 ⁇ m, and the ratio (Rz / S) between the 10-point average roughness Rz and the average interval S of local peaks specified in JIS B0601-1994 is 1 to 10 It has become.
  • the surface of the outermost layer can have a contact angle with water of 120 ° or more.
  • a vinylidene fluoride resin film containing 50 to 95% by mass of vinylidene fluoride resin and 5 to 50% by mass of methacrylic ester resin can be used per total mass of the resin component.
  • the vinylidene fluoride resin film may contain 5 to 30 parts by mass of titanium oxide with respect to 100 parts by mass of the resin component.
  • the vinylidene fluoride resin film having a thickness of, for example, 10 to 200 ⁇ m can be used.
  • the moisture permeability of the solar cell module back surface protective sheet may be 1 to 5 g / m 2 ⁇ 24 hours.
  • the vinylidene fluoride-based resin film may be a film in which unevenness is formed on the surface by sandwiching a film immediately after being melt-extruded and immediately before being cooled and solidified with an embossing roll.
  • the solar cell module according to the present invention includes the above-described back surface protection sheet for solar cell module.
  • the manufacturing method of the back surface protection sheet for solar cell module according to the present invention is defined by JIS B0601-1994 on the surface by forming irregularities on the surface by sandwiching with an embossing roll immediately after being melt-extruded and immediately before cooling and solidification.
  • the 10-point average roughness Rz is 5 to 100 ⁇ m, and the ratio (Rz / S) between the 10-point average roughness Rz and the average interval S of local peaks defined in JIS B0601-1994 on the surface is 1 to
  • the water repellency of the outermost layer of the back surface protection sheet is improved, it is possible to suppress the performance deterioration of the solar cell module due to the PID phenomenon.
  • FIG. 1 is a schematic diagram showing an example of a roughness curve representing the surface state of a vinylidene fluoride resin film constituting the outermost layer of the back surface protective sheet of the present embodiment.
  • the resin component of the vinylidene fluoride resin film disposed in the outermost layer of the back surface protective sheet of the present embodiment may be a homopolymer of vinylidene fluoride, or a vinylidene fluoride and another fluorine-containing monomer.
  • a copolymer may be used.
  • the fluorine-containing monomer that forms a copolymer with vinylidene fluoride include hexafluoropropylene, tetrafluoroethylene, hexafluoroisobutylene, and various fluoroalkyl vinyl ethers.
  • the amount of monomers other than vinylidene fluoride in the vinylidene fluoride resin should be 50% by mass or less in order to ensure weather resistance and light stability in the entire vinylidene fluoride resin film and the back surface protective sheet. Is preferred.
  • the vinylidene fluoride resin film may contain a methacrylic ester resin as a resin component in addition to the above-mentioned vinylidene fluoride resin.
  • Vinylidene fluoride resin is excellent in melt flowability and high heat decomposition temperature among fluororesins, and has good extrudability, and is excellent in weather resistance and mechanical strength even after film formation. Poor adhesion to other materials.
  • a methacrylic ester resin has an effect of improving adhesiveness with other resins when formed into a film. For this reason, adhesiveness with another raw material can be improved by mixing a methacrylic ester resin with vinylidene fluoride resin.
  • the amount of vinylidene fluoride resin in the resin component is less than 50% by mass, that is, when the amount of methacrylic ester resin exceeds 50% by mass, the weather resistance may be lowered.
  • the amount of vinylidene fluoride resin in the resin component exceeds 95% by mass, that is, when the amount of methacrylic ester resin is less than 5% by mass, the effect of improving the adhesion to other materials is sufficiently obtained. There may not be.
  • fusing with other materials sufficient fusing properties may not be obtained, and when adhering to other materials using an adhesive, wetting spreads when applying the adhesive. Since it becomes difficult, as a result, adhesiveness with another raw material falls.
  • vinylidene fluoride resin: methacrylic acid ester resin 70: 30 to 90:10.
  • a vinylidene fluoride resin film having excellent weather resistance and capable of being heat-sealed with other materials can be obtained.
  • the methacrylate ester-based resin mixed with the vinylidene fluoride-based resin is not particularly limited as long as it is a vinyl polymer based on a methacrylate ester monomer.
  • a homopolymer of a methacrylate ester, Either a copolymer of a plurality of methacrylic acid esters or a copolymer of a methacrylic acid ester and another monomer may be used.
  • examples of the methacrylic acid ester constituting the methacrylic acid ester resin include methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, pentyl methacrylate, and hexyl methacrylate. Of these, methyl methacrylate is preferred.
  • alkyl groups such as propyl group, butyl group, pentyl group and hexyl group in the methacrylic acid ester may be linear or branched.
  • Examples of monomers copolymerizable with methacrylic acid esters include acrylic acid esters having 1 to 8 carbon atoms such as methyl acrylate and butyl acrylate, styrene, ⁇ -methylstyrene, acrylonitrile, acrylic acid and other ethylene. Unsaturated unsaturated monomers.
  • the amount of monomers other than the methacrylate ester in the methacrylate ester resin is 50% by mass or less is preferable.
  • titanium oxide, magnesium oxide, barium sulfate are added to the vinylidene fluoride resin film for the purpose of providing concealability and enhancing reflectivity to increase the power generation efficiency of the solar cell.
  • Various white pigments such as basic lead carbonate and zinc oxide may be contained.
  • the content of the white pigment described above is preferably 5 to 30 parts by mass per 100 parts by mass of the resin component from the viewpoints of light reflection characteristics, dispersibility, and film formability.
  • the outermost layer of the back surface protective sheet of this embodiment that is, the surface of the vinylidene fluoride resin film has a 10-point average roughness Rz of 5 to 100 ⁇ m, and a 10-point average roughness Rz and an average interval S between local peaks.
  • the ratio (Rz / S) is 1 to 10.
  • the ten-point average roughness Rz and the ratio (Rz / S) between the ten-point average roughness Rz and the average interval S of the local peaks can be calculated by the method defined in JIS B0601-1994. As shown in FIG. 1, the ten-point average roughness Rz is extracted from the roughness curve by the reference length l in the direction of the average line.
  • the average value of the absolute values of the altitudes Yp 1 to 5 of the summit and the average value of the absolute values of the altitudes Yv 1 to 5 of the bottom valleys from the lowest (ie, deepest) valley bottom to the lowest (ie, deep order) Is obtained, and this value is expressed in micrometers ( ⁇ m).
  • the average interval S between the local peaks is obtained by calculating the average line length s 1 to 10 corresponding to the interval between adjacent local peaks in the average line direction of the roughness curve, and this number (10 in the example of FIG. 1) of the local peaks. The average value between them is expressed in millimeters (mm).
  • Rz / S which is the ratio between the ten-point average roughness Rz and the average interval S of the local peaks, is performed by converting the average interval S of the local peaks to units of micrometers.
  • the 10-point average roughness Rz on the outermost layer surface is less than 5 ⁇ m, sufficient water repellency cannot be obtained and the PID phenomenon cannot be suppressed.
  • the ten-point average roughness Rz of the outermost layer surface exceeds 100 ⁇ m, the sheet is perforated during surface processing, or the mechanical strength is significantly lowered after surface processing.
  • the ten-point average roughness Rz of the outermost layer surface is preferably 6 to 90 ⁇ m from the viewpoint of improving water repellency and preventing the occurrence of perforations and a decrease in mechanical strength.
  • the ratio (Rz / S) between the ten-point average roughness Rz and the average distance S between the local peaks is less than 1, sufficient water repellency cannot be obtained and the PID phenomenon cannot be suppressed. Moreover, it is difficult to produce a material having a ratio (Rz / S) of 10-point average roughness Rz to the average distance S between the local peaks exceeding 10. From the viewpoint of improving water repellency and improving workability, the ratio (Rz / S) of the ten-point average roughness Rz to the average distance S between the local peaks is preferably 2-9.
  • the outermost layer of the back surface protective sheet of the present embodiment that is, the surface of the vinylidene fluoride resin film, preferably has a contact angle with water of 115 ° or more, and more preferably 120 ° or more.
  • the water repellency of the outermost layer of the back protective sheet is increased, and the effect of suppressing the PID phenomenon is improved.
  • the upper limit of the contact angle is not limited, and the contact angle is 180 ° or less at the maximum.
  • the thickness of the vinylidene fluoride resin film constituting the outermost layer of the back surface protective sheet of the present embodiment is not particularly limited, but is preferably 5 to 300 ⁇ m, and more preferably 10 to 200 ⁇ m. By setting the thickness of the vinylidene fluoride resin film within this range, a back surface protective sheet having a laminated structure can be easily produced, and weather resistance when the back surface protective sheet is formed can be improved.
  • the moisture permeability of the back surface protective sheet of this embodiment is preferably 1 to 5 g / m 2 ⁇ 24 hours.
  • the moisture permeability of the back protective sheet is 1-5 g / m 2 ⁇ 24 hours, so that moisture that has entered the solar cell module can be easily released to the external environment, and the PID phenomenon can be suppressed even when used for a long time. Is possible.
  • the moisture permeability of the back surface protective sheet is more preferably 1 to 4 g / m 2 ⁇ 24 hours from the viewpoint of improving the effect of suppressing the PID phenomenon.
  • the moisture permeability range is not particularly limited, but if the moisture permeability is less than 1 g / m 2 ⁇ 24 hours, moisture that has entered the solar cell module is less likely to be released to the external environment, and the PID phenomenon is suppressed when used for a long time. There are cases where it is not possible. In addition, when the moisture permeability exceeds 5 g / m 2 ⁇ 24 hours, the amount of moisture entering the solar cell module increases, and the PID phenomenon may not be suppressed. In addition, the said water vapor transmission rate is a value measured on condition of 25 degreeC and 90% RH with a water vapor permeability meter based on JISK7129B.
  • the back surface protection sheet of this embodiment has a laminated structure with a base material sheet excellent in mechanical strength from the viewpoint of protecting solar cells from external stress.
  • the type of resin used for the substrate is not particularly limited, and includes polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), and polycyclohexanedimethanol-terephthalate (PCT).
  • polyolefin resins such as cyclic polyolefin (COC), polyethylene (HDPE, LDPE, LLDPE), polypropylene (PP), and polybutene
  • polyamides such as nylon 6, nylon 66, nylon 12, and copolymer nylon Resins, acrylic resins, polycarbonate resins, polyvinyl chloride resins, polystyrene resins, polyvinylidene chloride resins, ethylene-vinyl acetate copolymer resins, polyvinyl alcohol resins, polymers Vinyl acetate resin, acetals - can be used various synthetic resins such as Le resins, and polyarylate resins.
  • polyester-based resins, polyamide-based resins, and polyolefin-based resins are preferable from the viewpoint of physical properties and cost when used as a back protective sheet.
  • the thickness of the substrate is preferably 100 to 500 ⁇ m in consideration of the sheet physical properties.
  • the thickness of the substrate is less than 100 ⁇ m, the mechanical strength, the insulation resistance value, and the like may be reduced.
  • the thickness is more than 500 ⁇ m, the processing characteristics of the film may be reduced.
  • the manufacturing method of the back surface protection sheet of this embodiment includes the surface having the 10-point average roughness Rz and the ratio (Rz / S) between the Rz and the average interval S of the local peaks in a specific range.
  • a resin composition containing the vinylidene fluoride-based resin which is a raw material of the vinylidene fluoride-based resin film, is melt-extruded and then sandwiched between embossing rolls immediately before cooling and solidification.
  • a vinylidene fluoride resin film having Rz of 5 to 100 ⁇ m and Rz / S of 1 to 10 is obtained.
  • the back surface protective sheet of the present embodiment is a base material sheet in which a vinylidene fluoride resin film having specific irregularities on the surface is produced, and this vinylidene fluoride resin film is the outermost layer. Etc. can be manufactured by laminating and the like.
  • the ten-point average roughness Rz used for the back surface protective sheet of this embodiment is 5 to 100 ⁇ m, and the ratio (Rz / S) between the ten-point average roughness Rz and the average distance S between the local peaks is 1 to 10.
  • the vinylidene fluoride-based resin film is a raw material for the vinylidene fluoride-based resin film, and after melt-extruding a resin composition containing the vinylidene fluoride-based resin by an extrusion molding method such as a T-die method, immediately before cooling and solidification, It is obtained by forming irregularities on the surface by sandwiching (niping) with embossing rolls.
  • a method for laminating the vinylidene fluoride resin film with a base material sheet or the like is not particularly limited, and a thermal lamination method, a dry lamination method, or the like can be applied.
  • each layer constituting the back surface protection sheet is supplied to a separate extruder, melt-kneaded and supplied to the feed block, and then passed through a T-die, immediately before they are cooled and solidified. Is sandwiched (niped) by an embossing roll disposed on the vinylidene fluoride resin film surface side, and a specific uneven shape is formed on the surface of the vinylidene fluoride resin film, and each layer is laminated to form a back surface protection sheet You can also. This method has few manufacturing steps and can efficiently manufacture a back surface protective sheet.
  • the back surface protection sheet of this embodiment is manufactured by a coextrusion method in which the raw material resin or resin composition of each layer constituting the back surface protection sheet is supplied to a multi-manifold die having a multi-layer structure to produce a laminated sheet. You can also. This method is preferable in that a sheet having a small thickness distribution of each layer can be obtained.
  • the back surface protection sheet of this embodiment reheats the vinylidene fluoride resin film prepared in advance or the vinylidene fluoride resin film disposed on the outermost layer of the laminated sheet, and sandwiches (nips) it with an embossing roll.
  • It can also be manufactured by a method.
  • at least in melt extrusion molding manufactured by a method of sandwiching (niping) with an embossing roll immediately before cooling and solidifying a vinylidene fluoride resin film (resin composition as a raw material) It is preferable to do.
  • each layer in the case where the back surface protection sheet has a multi-layer configuration is carried out immediately after the resin composition containing the vinylidene fluoride resin as a raw material is melt-extruded and then cooled and solidified, with the embossing roll sandwiching step. It is easy to avoid problems of appearance defects such as warpage of the sheet due to the difference in rate, a decrease in mechanical strength due to deterioration of the heat-sensitive layer, and discoloration.
  • the nip condition is not particularly limited, but the roll temperature is preferably 25 to 100 ° C., more preferably 40 to 80 ° C. from the viewpoint of moldability.
  • the touch pressure is preferably 5 to 50 N / mm, more preferably 10 to 30 N / mm, from the viewpoint of molding processability, particularly from the viewpoint of increasing the thermal transfer rate.
  • the back surface protective sheet of the present embodiment has a 10-point average roughness Rz of 5 to 100 ⁇ m in the outermost layer, and the ratio between the 10-point average roughness Rz and the average interval S between the local peaks. Since a vinylidene fluoride resin film having (Rz / S) of 1 to 10 is disposed, it is superior in water repellency and moisture permeability as compared with conventional products. For this reason, it becomes possible by using the back surface protection sheet of this embodiment to suppress the performance degradation of the solar cell module by a PID phenomenon.
  • FIG. 2 is a cross-sectional view schematically showing an example of the structure of the solar cell module of the present embodiment.
  • solar cells 15 that are photovoltaic elements are sealed with a sealing material 13 made of a synthetic resin such as EVA resin.
  • the transparent substrate 12 which consists of glass etc. is laminated
  • the back surface protection sheet 11 of 1st Embodiment mentioned above is laminated
  • the back surface protection sheet 11 is arranged and laminated so that the surface formed of the vinylidene fluoride resin film on which specific irregularities are formed is on the outside.
  • the ten-point average roughness Rz is 5 to 100 ⁇ m in the outermost layer, and the ratio (Rz / S) between the ten-point average roughness Rz and the average interval S between the local peaks is 1 Since a vinylidene fluoride resin film of ⁇ 10 is disposed and a back surface protective sheet excellent in water repellency is used, performance deterioration due to the PID phenomenon is suppressed.
  • backside protective sheets of Examples 1 to 17 and Comparative Examples 1 to 5 were prepared using the materials shown below, and the water repellency and moisture permeability were measured and used in a solar cell module. The durability was evaluated.
  • each back surface protection sheet of an Example and a comparative example was made into the 3 layer structure shown below.
  • the inner layer thickness was 25 ⁇ m
  • the intermediate layer thickness was 250 ⁇ m
  • only the outermost layer thickness was changed.
  • Inner layer Vinylidene fluoride resin film layer
  • Intermediate layer Polyethylene terephthalate layer (hereinafter referred to as PET layer)
  • Outermost layer Vinylidene fluoride resin film layer
  • ⁇ Raw material for inner layer and outermost layer The raw materials for the vinylidene fluoride resin film used for the inner layer and the outermost layer were the same in all Examples and Comparative Examples, and the following materials were used.
  • PET layer for intermediate layer A trade name “Lumirror (registered trademark) X10S” (heat-resistant oligomer PET film) manufactured by Toray Industries, Inc. was used for the PET layer for the intermediate layer.
  • Example 1 A resin composition containing 80 parts by mass of vinylidene fluoride resin (B-1) and 20 parts by mass of methacrylic ester resin (B-2) was kneaded by a twin screw extruder of ⁇ 30 mm, and fluorinated. A vinylidene resin blend was obtained. Next, this blend was formed into a film using a T-die with an extrusion temperature of 250 ° C. in a single screw extruder of 40 mm in diameter.
  • the film extruded from the extruder was sandwiched (niped) by an embossing roll having a predetermined surface roughness under conditions of a roll temperature of 45 ° C. and a touch pressure of 15 N / mm immediately before cooling and solidifying.
  • the surface has a concavo-convex structure
  • the 10-point average roughness Rz is 5 ⁇ m
  • the ratio (Rz / S) of the 10-point average roughness Rz to the average interval S between the local peaks is 2.5.
  • a 200 ⁇ m vinylidene fluoride resin film was obtained.
  • This vinylidene fluoride resin film was used as the outermost layer, and was laminated with each film constituting the inner layer and the intermediate layer by dry lamination using a polyester-based adhesive to produce a back protective sheet of Example 1 having a three-layer structure. .
  • Example 2 The embossing roll at the time of film forming was changed, and otherwise, the 10-point average roughness Rz was 10 ⁇ m, the 10-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above.
  • the ratio (Rz / S) was 2.5, and a vinylidene fluoride resin film having a thickness of 200 ⁇ m was obtained.
  • the back surface protection sheet of Example 2 was produced by using this vinylidene fluoride resin film as the outermost layer.
  • Example 3 The embossing roll at the time of film forming was changed, and otherwise, the ten-point average roughness Rz was 50 ⁇ m, the ten-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above.
  • the ratio (Rz / S) was 2.5, and a vinylidene fluoride resin film having a thickness of 200 ⁇ m was obtained.
  • the back surface protection sheet of Example 3 was produced by using this vinylidene fluoride resin film as the outermost layer.
  • Example 4 The embossing roll at the time of film forming was changed, and otherwise, the 10-point average roughness Rz was 80 ⁇ m, the 10-point average roughness Rz and the average distance S between local peaks were the same as in Example 1 described above.
  • the ratio (Rz / S) was 2.5, and a vinylidene fluoride resin film having a thickness of 200 ⁇ m was obtained.
  • the back surface protection sheet of Example 4 was produced by making this vinylidene fluoride resin film into the outermost layer.
  • Example 5 Other than that, the embossing roll at the time of film formation was changed, except that the ten-point average roughness Rz was 100 ⁇ m, the ten-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above. The ratio (Rz / S) was 2.5, and a vinylidene fluoride resin film having a thickness of 200 ⁇ m was obtained. And the back surface protection sheet of Example 5 was produced by using this vinylidene fluoride resin film as the outermost layer.
  • Example 6 The embossing roll at the time of film forming was changed, and otherwise, the ten-point average roughness Rz was 50 ⁇ m, the ten-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above.
  • the ratio (Rz / S) was 1.1, and a vinylidene fluoride resin film having a thickness of 200 ⁇ m was obtained.
  • the back surface protection sheet of Example 6 was produced by using this vinylidene fluoride resin film as the outermost layer.
  • Example 7 The embossing roll at the time of film forming was changed, and otherwise, the ten-point average roughness Rz was 50 ⁇ m, the ten-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above. The ratio (Rz / S) of 5 was 5, and a 200 ⁇ m-thick vinylidene fluoride resin film was obtained. And the back surface protection sheet of Example 7 was produced by using this vinylidene fluoride resin film as the outermost layer.
  • Example 8 The embossing roll at the time of film forming was changed, and otherwise, the ten-point average roughness Rz was 50 ⁇ m, the ten-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above. Ratio (Rz / S) was 8, and a 200 ⁇ m-thick vinylidene fluoride resin film was obtained. And the back surface protection sheet of Example 8 was produced by making this vinylidene fluoride resin film into the outermost layer.
  • Example 9 The embossing roll at the time of film forming was changed, and otherwise, the ten-point average roughness Rz was 50 ⁇ m, the ten-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above.
  • the ratio (Rz / S) was 10 and a vinylidene fluoride resin film having a thickness of 200 ⁇ m was obtained.
  • the back surface protection sheet of Example 9 was produced by making this vinylidene fluoride resin film into the outermost layer.
  • Example 10 Except for the compound composition being 50 parts by mass of vinylidene fluoride resin and 50 parts by mass of methacrylic acid ester resin, the 10-point average roughness Rz was 50 ⁇ m and the 10-point average roughness was the same as in Example 1 described above. A vinylidene fluoride resin film having a ratio (Rz / S) between the thickness Rz and the average distance S between the local peaks was 2.5 and a thickness of 200 ⁇ m was obtained. And the back surface protection sheet of Example 10 was produced by using this vinylidene fluoride resin film as the outermost layer.
  • Example 11 Except for the compound composition being 70 parts by weight of vinylidene fluoride resin and 30 parts by weight of methacrylic ester resin, the 10-point average roughness Rz was 50 ⁇ m, the 10-point average roughness was the same as in Example 1 described above. A vinylidene fluoride resin film having a ratio (Rz / S) between the thickness Rz and the average distance S between the local peaks was 2.5 and a thickness of 200 ⁇ m was obtained. And the back surface protection sheet of Example 11 was produced by using this vinylidene fluoride resin film as the outermost layer.
  • Example 12 Except for the compound composition being 90 parts by mass of vinylidene fluoride resin and 10 parts by mass of methacrylic ester resin, the 10-point average roughness Rz is 50 ⁇ m and the 10-point average roughness is the same as in Example 1 described above.
  • the back surface protection sheet of Example 12 was produced by making this vinylidene fluoride resin film into the outermost layer.
  • Example 13 Except for the compound composition being 95 parts by mass of vinylidene fluoride resin and 5 parts by mass of methacrylic ester resin, the 10-point average roughness Rz is 50 ⁇ m and the 10-point average roughness is the same as in Example 1 described above.
  • the back surface protection sheet of Example 13 was produced by using this vinylidene fluoride resin film as the outermost layer.
  • Example 14 The ten-point average roughness Rz is the same as in Example 1 except that the compound composition is 95 parts by weight of vinylidene fluoride resin, 5 parts by weight of methacrylic ester resin, and 22 parts by weight of titanium oxide.
  • the back surface protection sheet of Example 14 was produced by making this vinylidene fluoride resin film into the outermost layer.
  • Example 15 A back surface protective sheet was produced by the same method and conditions as in Example 1 described above, except that the thickness of the vinylidene fluoride resin film constituting the outermost layer was 10 ⁇ m.
  • the vinylidene fluoride resin film disposed in the outermost layer of the back surface protective sheet of Example 15 has a 10-point average roughness Rz of 5 ⁇ m, a ratio between the 10-point average roughness Rz and the average interval S between the local peaks (Rz). / S) was 2.5.
  • Example 16 A back surface protective sheet was produced in the same manner and under the same conditions as in Example 1 except that the thickness of the vinylidene fluoride resin film constituting the outermost layer was 25 ⁇ m.
  • the vinylidene fluoride resin film disposed in the outermost layer of the back surface protective sheet of Example 16 has a 10-point average roughness Rz of 5 ⁇ m, a ratio between the 10-point average roughness Rz and the average interval S between the local peaks (Rz). / S) was 2.5.
  • Example 17 A back protective sheet was produced in the same manner and under the same conditions as in Example 1 except that the thickness of the vinylidene fluoride resin film constituting the outermost layer was 100 ⁇ m.
  • the vinylidene fluoride resin film disposed in the outermost layer of the back surface protective sheet of Example 17 has a 10-point average roughness Rz of 5 ⁇ m, and a ratio between the 10-point average roughness Rz and the average interval S between local peaks (Rz). / S) was 2.5.
  • Example 1 The embossing roll at the time of film forming was changed, and otherwise, the 10-point average roughness Rz was 4 ⁇ m, the 10-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above.
  • the ratio (Rz / S) was 2.5, and a vinylidene fluoride resin film having a thickness of 200 ⁇ m was obtained.
  • the back surface protection sheet of the comparative example 1 was produced by making this vinylidene fluoride resin film into the outermost layer.
  • Example 2 The embossing roll at the time of film formation was changed, and otherwise, the 10-point average roughness Rz was 105 ⁇ m, the 10-point average roughness Rz and the average distance S between the local peaks were the same as in Example 1 described above.
  • the ratio (Rz / S) was 2.5, and a vinylidene fluoride resin film having a thickness of 200 ⁇ m was obtained.
  • the back surface protection sheet of the comparative example 2 was produced by making this vinylidene fluoride resin film into the outermost layer.
  • Example 4 The compound composition was 100 parts by weight of the methacrylic ester resin, the embossing roll at the time of film formation was changed, and other conditions were the same as in Example 1 described above, and the ten-point average roughness Rz was 90 ⁇ m, ten points.
  • the ratio (Rz / S) of the average roughness Rz to the average distance S between the local peaks was 2.5, and a methacrylate resin film having a thickness of 200 ⁇ m was obtained.
  • the back surface protection sheet of the comparative example 4 was produced by making this methacrylate ester resin film into the outermost layer.
  • the ratio of the ten-point average roughness Rz and the ten-point average roughness Rz to the average interval S between the local peaks were measured by the methods defined in JIS B0601-1994. Specifically, each of the back surface protection sheets of Examples and Comparative Examples was cut into 50 mm square, and the surface of the vinylidene fluoride resin film was observed with a laser microscope VK-X110 manufactured by Keyence Corporation.
  • a reference length (l) is extracted from the roughness curve in the direction of the average line, and from the average line of this extracted portion, the elevations of the highest peaks (from the highest peak to the fifth highest) ( Y p1 to 5 ) and the sum of the absolute value of the absolute value of the altitude (Yv) of the bottom valley level (Yv) from the lowest valley bottom to the fifth lowest, and calculate this value in micrometers ( ⁇ m) expressed.
  • the length (s n ) of the average line corresponding to the interval between adjacent local peaks in the average line direction of the roughness curve was obtained, and the average value among the numerous local peaks was calculated.
  • the value of S was converted to a unit of ⁇ m.
  • the “solar simulator” is a light source device that artificially generates artificial sunlight, and is generally used for performance inspection and measurement of solar cells. Further, the maximum output P max of the solar cell can be obtained from the maximum operating voltage V pm and the maximum operating current I pm .
  • Evaluation of PID tolerance is “excellent” when the output retention rate is 100% or more, “good” when the output retention rate is 98% or more and less than 100%, “possible” when the output retention rate is 95% or more and less than 98%, and output retention rate 95% Less than “not possible”.
  • the solar cell modules using the back surface protection sheets of Examples 1 to 17 showed high resistance to the PID phenomenon.
  • the solar cell modules using the back surface protection sheets of Comparative Examples 1 to 5 had low resistance to the PID phenomenon.

Abstract

L'invention concerne : une feuille de protection arrière pour modules solaires, qui est capable de supprimer la dégradation des performances provoquées par un phénomène PID ; un module solaire ; et un procédé de fabrication d'une feuille de protection arrière pour modules solaires. Cette feuille de protection arrière pour modules solaires est obtenue par agencement d'un film de résine de fluorure de vinylidène, qui possède une rugosité moyenne sur dix points Rz définie par la norme JIS B0601-1994 de 5 à 100 μm et un rapport de la rugosité moyenne sur dix points Rz sur l'espacement moyen de crêtes locales du profil S défini par la norme JIS B0601-1994, c'est-à-dire un rapport Rz/S, de 1 à 10, de manière que le film de résine de fluorure de vinylidène serve de couche la plus à l'extérieur. Un module solaire est configuré à l'aide de cette feuille de protection arrière pour modules solaires.
PCT/JP2015/079036 2014-10-15 2015-10-14 Feuille de protection arrière pour modules solaires, module solaire et procédé de fabrication de feuille de protection arrière pour modules solaires WO2016060163A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580055523.9A CN106796967A (zh) 2014-10-15 2015-10-14 太阳能电池模块用背面保护片、太阳能电池模块和太阳能电池模块用背面保护片的制造方法
JP2016554099A JPWO2016060163A1 (ja) 2014-10-15 2015-10-14 太陽電池モジュール用裏面保護シート、太陽電池モジュール及び太陽電池モジュール用裏面保護シートの製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014211234 2014-10-15
JP2014-211234 2014-10-15

Publications (1)

Publication Number Publication Date
WO2016060163A1 true WO2016060163A1 (fr) 2016-04-21

Family

ID=55746705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/079036 WO2016060163A1 (fr) 2014-10-15 2015-10-14 Feuille de protection arrière pour modules solaires, module solaire et procédé de fabrication de feuille de protection arrière pour modules solaires

Country Status (3)

Country Link
JP (1) JPWO2016060163A1 (fr)
CN (1) CN106796967A (fr)
WO (1) WO2016060163A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020507920A (ja) * 2017-02-01 2020-03-12 ボレアリス エージー 層エレメントを含む物品

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012077147A (ja) * 2010-09-30 2012-04-19 Lintec Corp 撥水シート
JP2014019125A (ja) * 2012-07-23 2014-02-03 Denki Kagaku Kogyo Kk 多層シート、太陽電池用バックシート及び太陽電池モジュール
WO2014057933A1 (fr) * 2012-10-10 2014-04-17 電気化学工業株式会社 Composition de résine de fluorure de vinylidène, film de résine, couche arrière de cellule solaire et module de cellule solaire

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2570452B1 (fr) * 2010-05-14 2017-03-01 Mitsubishi Rayon Co., Ltd. Film, procédé pour produire celui-ci, film ou feuille stratifié(e), et stratifié
JP2013245849A (ja) * 2012-05-24 2013-12-09 Konica Minolta Inc 太陽熱発電用フィルムミラー、太陽熱発電用フィルムミラーの製造方法及び太陽熱発電用反射装置
CN202911255U (zh) * 2012-10-10 2013-05-01 欧贝黎新能源科技股份有限公司 一种太阳能电池复合背板层压用模具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012077147A (ja) * 2010-09-30 2012-04-19 Lintec Corp 撥水シート
JP2014019125A (ja) * 2012-07-23 2014-02-03 Denki Kagaku Kogyo Kk 多層シート、太陽電池用バックシート及び太陽電池モジュール
WO2014057933A1 (fr) * 2012-10-10 2014-04-17 電気化学工業株式会社 Composition de résine de fluorure de vinylidène, film de résine, couche arrière de cellule solaire et module de cellule solaire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020507920A (ja) * 2017-02-01 2020-03-12 ボレアリス エージー 層エレメントを含む物品

Also Published As

Publication number Publication date
JPWO2016060163A1 (ja) 2017-07-27
CN106796967A (zh) 2017-05-31

Similar Documents

Publication Publication Date Title
JP5714959B2 (ja) 太陽電池用保護シートおよびその製造方法、ならびに太陽電池モジュール
JP5297249B2 (ja) 太陽電池モジュール用保護シート及び太陽電池モジュール並びに太陽電池モジュールの製造方法
CN103765609B (zh) 太阳电池用背板及太阳电池模组
JP5214087B2 (ja) 太陽電池モジュール用バックシート及びこれを用いた太陽電池モジュール
KR20130143039A (ko) 태양전지용 보호시트 및 그 제조 방법, 및 태양전지 모듈
WO2013118570A1 (fr) Feuille protectrice pour photopile et module solaire
JP5895661B2 (ja) 太陽電池モジュール用裏面保護シート及び太陽電池モジュール
JP6035818B2 (ja) 太陽電池モジュール用裏面保護シート及び太陽電池モジュール
JP6373267B2 (ja) 多層シート及びその製造方法、太陽電池用バックシート並びに太陽電池モジュール
KR20130062539A (ko) 방열특성이 우수한 태양전지 백시트 및 그 제조방법
JP2010238714A (ja) 太陽電池モジュール用保護シート及び太陽電池モジュール並びに太陽電池モジュールの製造方法
WO2016060163A1 (fr) Feuille de protection arrière pour modules solaires, module solaire et procédé de fabrication de feuille de protection arrière pour modules solaires
WO2013015259A1 (fr) Feuille stratifiée et son procédé de production
JP2013038414A (ja) 太陽電池用ポリマーシート及び太陽電池モジュール
JP2016072540A (ja) 裏面保護シート及びそれを用いた太陽電池モジュール
US20130189517A1 (en) Multi-layer fluororesin film, extrusion method thereof and solar module using the same
US20120211057A1 (en) Photovoltaic back sheet laminates, photovoltaic modules comprising photovoltaic back sheet laminates, and methods for making photovoltaic back sheet laminates
WO2012050190A1 (fr) Feuille de protection de surface arrière pour module de cellule solaire et module de cellule solaire
KR20120088972A (ko) 다층 시트 및 이를 포함하는 광전지 모듈
JPWO2016031340A1 (ja) 太陽電池用裏面保護シート及び太陽電池モジュール
KR101276047B1 (ko) 색상을 갖는 태양전지모듈용 이면 보호시트의 제조방법
JP2015191944A (ja) 裏面保護シート及びそれを用いた太陽電池モジュール
JP2015056579A (ja) 太陽電池保護シート及び該保護シートを用いた太陽電池モジュール
TWI655787B (zh) Solar cell back protection sheet
WO2014208758A1 (fr) Matériau protecteur pour cellule solaire

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15851151

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016554099

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15851151

Country of ref document: EP

Kind code of ref document: A1