WO2015139516A1 - Structure d'encapsulant pour cellule solaire et son procédé de fabrication - Google Patents

Structure d'encapsulant pour cellule solaire et son procédé de fabrication Download PDF

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Publication number
WO2015139516A1
WO2015139516A1 PCT/CN2015/000176 CN2015000176W WO2015139516A1 WO 2015139516 A1 WO2015139516 A1 WO 2015139516A1 CN 2015000176 W CN2015000176 W CN 2015000176W WO 2015139516 A1 WO2015139516 A1 WO 2015139516A1
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WIPO (PCT)
Prior art keywords
layer
encapsulant
functional film
film
solar cell
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PCT/CN2015/000176
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English (en)
Chinese (zh)
Inventor
仇桂芬
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仇桂芬
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Publication of WO2015139516A1 publication Critical patent/WO2015139516A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/12—Photovoltaic modules
    • 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 invention relates to a film, in particular to a solar cell encapsulant and a preparation method thereof.
  • the solar cell back encapsulant does not require high light transmission performance, it can be used with a film having a low transmittance, or a certain filler can be added to increase the function and reduce the cost. If the glue with lower transmittance is used, the cost is reduced, the back plate is protected, and the damage of the ultraviolet rays to the back plate is reduced; the filler with high reflectivity is added to increase the reflectance, thereby reflecting the sunlight, being reabsorbed by the battery, and improving the solar energy. Battery power; adding thermal conductive filler to improve the thermal conductivity of the back encapsulant, reducing the effect of temperature on battery efficiency, and so on.
  • the surface-encapsulating adhesive avoids the addition of the ultraviolet absorber, so that the ultraviolet light can reach the surface of the battery sheet, and the ultraviolet absorber is added to the backlight surface encapsulant to protect the back sheet. Avoid UV damage.
  • the ultraviolet absorber affects the enveloping surface encapsulant during the aging process, so that the ultraviolet portion cannot reach the surface of the cell sheet and loses a certain conversion rate. Adding a light-shielding filler to the back surface encapsulant can well protect the backsheet and maintain conversion efficiency and reduce attenuation.
  • the encapsulant is basically EVA or polyolefin.
  • a layer of transparent encapsulant is combined with a low transmittance encapsulant.
  • This method is isolated with a layer of transparent glue that blocks the white encapsulant from contaminating the cell.
  • this method has not studied the root cause of overflow or texture.
  • a similar patent, such as application number 201220587305.3, double-glass photovoltaic module adds a transparent encapsulant between the cell sheet and the white back encapsulant, without the encapsulant.
  • the flow characteristics and process methods are described and studied in depth. Similar products, such as the transparent-white double-layer EVA currently on the market, need to face the transparent layer when facing the battery. In fact, it is necessary to avoid the stained backlight encapsulant overflowing the contaminated cell.
  • the backlight encapsulation on the cell is not necessarily transparent. It can be made into white or other colors with low transparency without any overflow. Or the appearance of the texture. Moreover, the transparent encapsulating adhesive with strong fluidity has a limited barrier effect, so this method is not ideal for the control of overflow. In addition, these methods of adding a transparent layer between the battery sheet and the back white encapsulant, the effect of reflecting sunlight is slightly inferior, because the transparent layer itself has a certain suction on the sunlight. It will increase the optical path of the reflected light and weaken the effect of increasing power.
  • This patent proves by experiment that there is no need to add a transparent film between the battery sheet and the back encapsulant to prevent the white or other color back encapsulant from overflowing with poor transparency, as long as the battery is in accordance with the method described in this patent.
  • the sheet can also be directly in contact with the less transparent backside encapsulant film, or the thickness of the transparent layer between the cell sheet and the back encapsulant can be greatly reduced, thereby allowing more direct reflection of sunlight or conduction of heat or other effects, and the entire The bonding effect and crosslinking degree of the system are not affected much.
  • the object of the present invention is to overcome the above deficiencies, and to provide a solar cell encapsulant and a preparation method thereof, which can not overflow, does not cause lines and wrinkles, and can ensure sufficient cross-linking degree and bonding. effect.
  • a solar cell encapsulant comprising at least two layers of a film, comprising an encapsulant layer and at least one functional film layer, or other layers may be added as a transition layer, wherein the functional film has less fluidity than the encapsulant The fluidity of the layer.
  • the functional film has a weak link caused by punching or embossing.
  • the fluidity of the functional film is characterized by a melt index, which is less than 20 g/10 min below 150 ° C, and the functional film may be transparent or white or other colors.
  • the functional film may be selected from one or more of PET, POE, PVC, EVA, PE, PIB, IIR, PP and the like.
  • Additives such as adhesion promoters may also be added to improve performance or to add fillers.
  • the thickness of the functional film is between 0.0001 mm and 1 mm, preferably between 0.001 mm and 0.5 mm.
  • the encapsulant layer is preferably a white EVA layer.
  • the encapsulating layer and the transition film layer have a melt index of less than 150 g/10 min.
  • It can be prepared by integrally forming a functional film, an encapsulant layer or a functional film with an encapsulant layer and a transition layer; A separate preparation method is employed.
  • the functional film and the encapsulant layer, or the functional film and the encapsulant layer, and the transition film layer are composited by coating; or the double-layer or multi-layer co-extrusion method is combined; or the functional film and the encapsulant layer are separately prepared.
  • the transition film layer is laminated in the order of lamination, and is combined by temperature and pressure during lamination; or one or two layers are prepared first, and the other layer is prepared with the layer already prepared. Pressing or compounding with an adhesive; or laminating by lamination, or other methods.
  • the two films may not easily separate the obvious boundaries.
  • the encapsulant has uneven fluidity in the thickness direction. The encapsulant melts during lamination and fuses at the interface, resulting in a non-obvious boundary between the functional film and the encapsulant. The fluidity near the side of the functional film is small, and the fluidity away from the side of the functional film is large.
  • the encapsulant has a certain thermal cross-linking during lamination, and the fluidity is greatly reduced, and the fluidity before cross-linking cannot be judged. At this time, it should be judged from the processing technology and raw materials of the two films.
  • the cross-linking type encapsulant layer is processed to avoid gelation at higher temperatures, and its processing temperature is limited.
  • the processing temperature of the functional film is generally higher than the processing temperature of the encapsulant layer, and needs to be processed separately.
  • the raw materials used for the two films have different fluidity.
  • the invention utilizes a layer of functional film with low fluidity to be compounded with the encapsulant layer, and can be melt-hot pressed composite, directly laid or other composite method, since the functional film itself has less fluidity than the encapsulant layer, on the one hand, it is more than the encapsulant
  • the layer is more difficult to overflow and has a good limiting effect on the overflow of higher flow encapsulants.
  • the functional film since the functional film has less fluidity than the encapsulant, the functional film with lower fluidity during lamination will restrict and restrain the flow of the encapsulating adhesive with higher fluidity, so that the encapsulant flows when “ The grain generated on the interface of the transparent-dyeing is not obvious or even completely disappeared, so the phenomenon of lines and wrinkles is greatly improved.
  • the functional film can also be used for the face-up surface and is compounded with a transparent encapsulant on the mater surface.
  • the backlight surface adopts a white or other color poorly transmissive encapsulant similar in fluidity to the transparent encapsulant.
  • the functional film faces the cell. In areas other than the component cell, the functional film directly contacts the backside white (or other color) encapsulant.
  • the function of the functional film to improve the overflow and texture is similar to that of the back surface; since its fluidity is less than that of the back white (or other color) encapsulant, its flow in the thickness direction is limited, thereby controlling the overflow.
  • the functional film with low fluidity will play a role in the flow of the highly fluid back encapsulant in the horizontal plane, avoiding the formation of wrinkles or wrinkles on the "transparent-white (or other color)" interface.
  • the invention can use the existing encapsulant formulation and process to make the encapsulant, and ensure that the adhesion of the encapsulant to the back sheet or the back surface glass is not affected.
  • the punching function film or some weak links such as patterns are formed on the functional film, and then compounded with the encapsulating layer. Under the influence of temperature and pressure during lamination, the encapsulating glue may seep through the holes or weak links to ensure leakage. a certain amount of adhesion; On the other hand, the amount of glue that is exuded is controlled, and the overflow of the back encapsulant can also be avoided. After testing, it was confirmed that the solar cell made of the punched functional film composite white (or other color) encapsulant layer has great improvement in both the control of the overflow and the control of the grain.
  • a film with a strong composite bond strength on the functional film is used as a transition layer, and the color thereof may be a transparent or white light having a low light transmittance (if the functional film is located on the light-facing surface, the functional film layer and the transition layer are also required to be secured). Sufficient light transmittance) can further improve performance.
  • the adhesive obtained by this method, the appearance or the functional film surface adhesion can meet the requirements.
  • a material having a melting temperature of 150 ° C or less is used as a functional film, and in order to improve its performance, some additives may be added thereto, and then compounded with the encapsulant layer as a whole of the encapsulant.
  • Two or more components may also be used as the main material of the functional film to be compounded with the encapsulant body.
  • Other layers can also be added as a transition layer.
  • a material that is more adhesive and less prone to overflow or texture, such as polyvinyl butyral as a functional film material, can also achieve an improved appearance. This patent has been proved by experiments that the material is difficult to produce appearance problems such as overflow and texture. It is believed that with the development of technology, more materials that meet the requirements and are inexpensive will be developed. However, under the same conditions, the method proposed in this patent will effectively improve or even completely eliminate the overflow. Wrinkling phenomenon.
  • the functional film or other film layers in the system can be used in a variety of materials, such as PET, PVC, PE and other materials with many other advantages.
  • materials such as PET, PVC, PE and other materials with many other advantages.
  • the water vapor transmission rate of the entire back encapsulant can be reduced, the material cost can be reduced, the bulk resistance can be improved, the component PID effect can be reduced, the anti-yellowing property of the encapsulant can be improved, and the like, and the packaging tape has an additional advantage.
  • the functional film does not overflow itself, it can also be added with a high reflectivity filler to improve the reflectivity without necessarily maintaining its high transparency.
  • a transparent EVA layer to isolate the white EVA layer and Cell:
  • the method disclosed in Patent 201220587305.3 also uses a transparent layer to isolate the white EVA and the cell sheet, thereby improving the reflection effect.
  • the amount of reflective filler required to achieve the same reflectivity can be greatly reduced, thereby saving costs.
  • the material cost is low, the cost of the film of the same material is generally lower than the non-woven fabric, glass fiber.
  • This design can maintain sufficient cross-linking degree of the encapsulant, or the degree of cross-linking is almost unaffected.
  • the punching function film is compounded with the encapsulant to ensure sufficient adhesion. Some lines are pressed on the film to create some weak links. During the lamination process, the encapsulant can penetrate these weak points to achieve similar effects to the perforated film.
  • the present invention captures the key causes of appearance problems such as overflow and texture, and the method has better effects on the control of wrinkles and textures.
  • the transparent layer for blocking such as some products on the market use a transparent EVA layer to isolate the white EVA layer and the battery sheet to prevent overflow: as disclosed in patent 201220587305.3, it is also transparent
  • the layer-isolated white EVA and the battery sheet have a certain effect on avoiding overflow, the effect of improving the wrinkles and texture problems in the area without the battery sheet in the solar module is very limited.
  • Figure 1 is a structure of a general solar cell
  • a solar cell encapsulant comprises a layer of encapsulant and a layer of functional film in sequence.
  • the functional film is laminated with the encapsulant layer.
  • the functional film surface is close to the cell sheet, and the encapsulant layer is close to the back plate side.
  • the functional film has a fluidity less than that of the encapsulant layer, and the encapsulant layer is white EVA, and the whole of the functional film and the encapsulant is used as the back encapsulant as a whole.
  • EVA masterbatch having a vinyl acetate content of 28% by weight and a MI of 10 g/10 min
  • 6 parts of rutile-type titanium dioxide and 2 parts of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone was uniformly mixed and used as a functional film raw material.
  • the functional film raw material is stretched, drawn, and wound to form a functional film having a thickness of about 0.2 mm.
  • the temperature of the control layer is 80-90 degrees Celsius, and the raw material of the encapsulating layer is extruded, stretched, drawn, and compounded with the functional film to form a 0.4 mm back encapsulant as a whole.
  • the face of the mating surface is made of Foster F806 transparent EVA film.
  • the photovoltaic glass, the glossy surface encapsulant as a whole, the cell sheet, the back encapsulant as a whole, and the back sheet were laminated in this order, and the functional film surface was oriented toward the cell sheet, and the module size was 45 ⁇ 45 cm, laminated and evaluated for appearance.
  • a solar cell encapsulant comprising a functional film on one side of the cell sheet and an encapsulant layer on the side of the back sheet or glass.
  • the functional film is compounded with the encapsulant layer, the functional film has less fluidity than the encapsulant layer, the encapsulant layer is white EVA, and the functional film and the encapsulant are integrally formed as the back encapsulant as a whole, and the face-face package is packaged.
  • the glue is entirely made of transparent EVA film on the market, such as Foster F806. When laminated, the functional film surface is in close proximity to the cell sheet.
  • EVA pellets having a vinyl acetate content of 32% by weight, MI of 40 g/10 min, 6 parts of rutile-type titanium oxide, 0.5 parts of ⁇ -methacryloxypropyltrimethoxysilane, 1 Part of tert-butyl-(2-ethylhexyl)monoperoxycarbonate, 0.5 part of triallyl isocyanurate, and 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone are uniformly mixed.
  • MI 40 g/10 min
  • 6 parts of rutile-type titanium oxide 0.5 parts of ⁇ -methacryloxypropyltrimethoxysilane
  • tert-butyl-(2-ethylhexyl)monoperoxycarbonate 0.5 part of triallyl isocyanurate
  • 2-hydroxy-4-n-octyloxybenzophenone 2-hydroxy-4-n-octyloxybenzophenone
  • EVA masterbatch having a vinyl acetate content of 28% by weight and a MI of 3 g/10 min was added to 6 parts of rutile-type titanium dioxide and 2 parts of ⁇ -methacryloxypropyltrimethoxysilane, 0.2.
  • the 2-hydroxy-4-n-octyloxybenzophenone is uniformly mixed as a raw material of the functional film.
  • the functional film raw material is stretched, drawn, and wound to form a functional film having a thickness of about 0.1 mm.
  • the encapsulating rubber layer material is extruded at 80 to 90 degrees Celsius, stretched, drawn, and controlled at a temperature of 70 to 90 degrees to be combined with a functional film by hot pressing to form a 0.4 mm back encapsulant as a whole.
  • the face of the mating surface is made of Foster F806 transparent EVA film.
  • the whole surface and the back surface encapsulant of the mating surface encapsulant are laminated and packaged as a light-emitting and backlight surface EVA.
  • the functional film surface is adjacent to the cell sheet, and the module size is 45 ⁇ 45 cm. .
  • a solar cell encapsulant comprises a functional film on one side of the cell sheet, an encapsulant layer on the side of the back sheet or the glass, and a transition layer distributed on the side of the functional film near the cell sheet.
  • the functional film is compounded with the encapsulant layer and the transition layer.
  • the functional film has less fluidity than the encapsulant layer and the transition layer, and the encapsulant layer is white EVA, and the functional film layer, the transition layer and the encapsulant are integrated.
  • the face-up package is made of a transparent EVA film on the market, such as the Foster F806.
  • the transition layer is in close proximity to the cell sheet during lamination.
  • EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min 100 parts of EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min were added, and 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added. 1 part of tert-butyl-(2-ethylhexyl)monoperoxycarbonate, 0.5 part of triallyl isocyanurate, 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone The machine is evenly mixed and used as a raw material for the encapsulant layer.
  • EVA masterbatch having a vinyl acetate content of 33% by weight and an MI of 30 g/10 min
  • 6 parts of rutile-type titanium dioxide 2.5 parts of ⁇ -methacryloxypropyltrimethoxysilane, 0.5 parts of triallyl isocyanurate, 1 part of tert-butyl-(2-ethylhexyl) monoperoxycarbonate, 0.2 parts of 2-hydroxy-4-n-octyloxybenzophenone, mixed Uniform, as a raw material for the transition layer.
  • a 0.003 mm BOPP film was used as the functional film.
  • the temperature was controlled to 90 degrees, and a 0.02 mm thick transition layer was laminated thereon to form a composite film 1.
  • the temperature of the sealing layer is controlled at 80-90 degrees Celsius.
  • the material of the encapsulating layer is extruded, stretched, drawn, and composited with the composite film 1.
  • the transition layer is closely attached to the functional film layer; the functional film layer is closely attached to the sealing layer to form the back package. Glue overall.
  • the face masking adhesive is made of Foster F806 transparent EVA film.
  • the whole face and back package rubber of the face-up package are laminated as a light-emitting and backlight surface EVA.
  • the transition layer directly contacts the cell sheet, and the component size is 45 ⁇ 45 cm.
  • a solar cell encapsulant comprising a functional film on one side of the cell sheet and an encapsulant layer on the side of the back sheet or glass.
  • the functional film is compounded with the encapsulant layer, the functional film has less fluidity than the encapsulant layer, the encapsulant layer is white EVA, and the functional film and the encapsulant are integrally formed as the back encapsulant as a whole, and the face-face package is packaged.
  • the glue is made of a transparent EVA film on the market, such as the Foster F806. When laminated, the functional film surface is in close proximity to the cell sheet.
  • EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min 100 parts of EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min were added, and 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • 1 part of tert-butyl-(2-ethylhexyl) monoperoxycarbonate, 0.5 part of triallyl isocyanate, 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone The machine is evenly mixed and used as a raw material for the encapsulant layer.
  • the temperature of the control layer is 80-90 degrees Celsius, and the raw material of the package rubber layer is extruded, stretched, drawn, and compounded with the functional film to form a whole package of the back surface sealant.
  • the face masking adhesive is made of Foster F806 transparent EVA film.
  • the whole face and back package rubber of the face-up package are laminated as a light-emitting and backlight surface EVA.
  • the functional film in the whole of the back encapsulant directly contacts the cell sheet, and the module size is 45 ⁇ 45 cm.
  • a solar cell encapsulant comprising a functional film on one side of the cell sheet and an encapsulant layer on the side of the back sheet or glass.
  • the functional film is compounded with the encapsulant layer, and the functional film has a fluidity smaller than that of the encapsulant layer, and the integral structure of the functional film and the encapsulant film made of white EVA is used as the backlight encapsulant as a whole.
  • Foster EVA F806 is used as a mating surface encapsulant.
  • EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min 100 parts of EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min were added, and 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • the encapsulant layer and the functional film are heat-compressed at a temperature of about 80 degrees Celsius, and the white side of the encapsulant layer is adjacent to the functional film.
  • the main material is made of EVA's back encapsulant as a whole.
  • the face of the mating surface is made of Foster F806 transparent EVA film.
  • the whole face and back side encapsulant of the face-up package are laminated as a light-emitting and back-face EVA.
  • the functional film in the back package is directly in contact with the cell, and the appearance is evaluated.
  • the component size is 45 ⁇ 45 cm.
  • a solar cell encapsulant comprising a functional film layer on one side of the cell sheet and an encapsulant layer on the side of the back sheet or glass.
  • the functional film is compounded with the encapsulant layer, the functional film has less fluidity than the encapsulant layer, the encapsulant layer is white EVA, and the functional film and the encapsulant are integrally formed as the back encapsulant as a whole, and the face-face package is packaged.
  • the glue is made of a transparent EVA film on the market, such as the Foster F806. When laminated, the functional film surface is in close proximity to the cell sheet.
  • EVA pellets having a vinyl acetate content of 36% by weight and an MI of 40 g/10 min
  • 6 parts of rutile-type titanium dioxide 0.5 parts of ⁇ -methacryloxypropyltrimethoxysilane, 1 part of tert-butyl-(2-ethylhexyl)monoperoxycarbonate, 0.5 part of triallyl isocyanurate, 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone
  • the machine is evenly mixed and used as a raw material for the encapsulant layer.
  • the temperature of the control film is 80-90 degrees Celsius
  • the encapsulating film layer is extruded, stretched, guided, and sequentially combined with the functional film layers 1, 2, and 3 to form a back-side encapsulating film as a whole.
  • the face of the mating surface is made of Foster F806 transparent EVA film.
  • the whole surface and back surface encapsulant of the mating surface encapsulant are laminated and packaged as a mating and backlighting encapsulant.
  • the functional film surface directly contacts the cell sheet, and the appearance is evaluated.
  • the component size is 45 ⁇ 45 cm.
  • a solar cell encapsulant comprising a functional film on one side of the cell sheet and an encapsulant layer on the side adjacent to the glass.
  • the functional film is compounded with the encapsulant layer.
  • the functional film has less fluidity than the encapsulant layer, and the encapsulant layer is selected by Foster F806 transparent EVA film.
  • the encapsulant made of the functional film and the Foster EVA film is used as a whole for the face-up package, and is used together with the white EVA as the back package film.
  • the Foster F806 transparent EVA film is used as the coating layer for the mating surface.
  • the functional film and the mating surface encapsulant layer are heat-compressed at a temperature of about 80 degrees Celsius to form a whole surface encapsulating adhesive of EVA.
  • EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min 100 parts of EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min were added, and 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • 1 part of tert-butyl-(2-ethylhexyl)monoperoxycarbonate, 0.5 part of triallyl isocyanurate, 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone The machine is evenly mixed and used as a raw material for the encapsulant layer to form a back encapsulant having a thickness of 0.37 mm.
  • the whole surface of the mating surface encapsulant and the back surface encapsulant are laminated as a light-emitting and backlight surface EVA, and the functional film surface is tightly attached to the cell.
  • the module size is 45 ⁇ 45 cm, and the appearance is evaluated.
  • a solar cell encapsulant comprises a layer of encapsulant and a layer of functional film in sequence.
  • the functional film is compounded with the encapsulant layer, the functional film has less fluidity than the encapsulant layer, the encapsulant layer is white EVA, and the functional film and the encapsulant are integrally formed as the back encapsulant as a whole, and the face-face package is packaged.
  • the glue is made of a transparent EVA film on the market, such as the Foster F806. When laminated, the functional film surface is in close proximity to the cell sheet.
  • EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min 100 parts of EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min were added, and 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added. 1 part of tert-butyl-(2-ethylhexyl)monoperoxycarbonate, 0.5 part of triallyl isocyanurate, 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone The machine is evenly mixed and used as a raw material for the encapsulant layer.
  • EVA masterbatch having a vinyl acetate content of 22% by weight and an MI of 20 g/10 min
  • 6 parts of rutile-type titanium dioxide and 2 parts of ⁇ -methacryloxypropyltrimethoxysilane are added.
  • 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone was uniformly mixed by a mixture to serve as a functional film raw material.
  • the functional film raw material is stretched, drawn, and wound to form a functional film having a thickness of about 0.1 mm.
  • the temperature of the control layer is 80-90 degrees Celsius, and the raw material of the encapsulating layer is extruded, stretched, drawn, and pressed with the functional film to form the whole backing encapsulant of the main material as EVA.
  • the face of the mating surface is made of Foster F806 transparent EVA film.
  • the photovoltaic glass, the whole surface of the mating surface encapsulant, the cell sheet, the back encapsulant, and the back sheet were laminated in this order, and the functional film layer was laminated next to the cell sheet, and laminated, and the module size was 45 ⁇ 45 cm, and the appearance was evaluated.
  • a solar cell encapsulant comprises a layer of encapsulant layer, a layer of functional film and a layer of transition layer.
  • the functional film layer and the transition layer are combined with the encapsulant layer.
  • the functional film has a fluidity less than that of the encapsulant layer, and the whole of the functional film and the encapsulant is used as the back encapsulant as a whole.
  • the Foster F806 was chosen as the transition layer.
  • EVA pellets having a vinyl acetate content of 32% by weight and a MI of 30 g/10 min were added, and 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • 1 part of tert-butyl-(2-ethylhexyl)monoperoxycarbonate, 0.5 part of triallyl isocyanurate, 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone The granulator was uniformly mixed and used as a raw material for the encapsulant layer to form an encapsulant layer having a thickness of 0.35 mm.
  • the encapsulating adhesive layer and the functional film and the transition layer are heat-compressed at a temperature of about 80 degrees Celsius in turn to form a back encapsulant as a main material of the EVA.
  • the face of the mating surface is made of Foster F806 transparent EVA film.
  • the photovoltaic glass, the mating surface encapsulant as a whole, the cell sheet, the back encapsulant as a whole (the transition layer directly contacts the cell sheet), the back sheet were laminated, and laminated, and the module size was 45 ⁇ 45 cm, and the appearance was evaluated.
  • a solar cell encapsulant comprises a functional film layer, a layer of encapsulating film, and a functional film layer.
  • the functional film layer is compounded with the encapsulant film layer, the functional film layer has a fluidity smaller than that of the encapsulant film layer, and the encapsulant film layer is a white EVA layer.
  • the whole of the functional film layer and the encapsulant film layer is used as the whole of the back surface encapsulant, and the glossy surface encapsulant is selected from a transparent EVA film on the market, such as Foster F806.
  • EVA pellets having a vinyl acetate content of 32% by weight, MI of 40 g/10 min, 6 parts of rutile-type titanium oxide, 0.5 parts of ⁇ -methacryloxypropyltrimethoxysilane, 1 Part of tert-butyl-(2-ethylhexyl)monoperoxycarbonate, 0.5 part of triallyl isocyanurate, 0.2 part of 2-hydroxy-4-n-octyloxybenzophenone
  • the machine is evenly mixed and used as a raw material for the encapsulant layer.
  • the three layers of the functional film layer, the encapsulant film layer and the functional film layer are sequentially thermocompression-bonded at 90 degrees Celsius to form a back-side encapsulant as a whole.
  • the face of the mating surface is made of Foster F806 transparent EVA film.
  • the whole face and back side encapsulant of the face-up package were laminated and packaged as a mating and back-face encapsulant, and the appearance was evaluated.
  • the component size was 45 ⁇ 45 cm.
  • a solar cell encapsulant the transparent face encapsulant is selected from a transparent EVA film on the market, such as Foster F806.
  • the backlight package is white.
  • EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min 100 parts of EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min were added, and 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added.
  • the raw material of the encapsulating layer is kneaded, stretched, and drawn to form a white backing encapsulant as a main material of EVA.
  • the face of the mating surface is made of Foster F806 transparent EVA film.
  • the photovoltaic glass, the mating surface encapsulant as a whole, the cell sheet, the back encapsulant as a whole, and the back sheet were laminated and laminated, and the module size was 45 ⁇ 45 cm, and the appearance was evaluated.
  • a solar cell encapsulant the transparent face encapsulant is selected from a transparent EVA film on the market, such as Foster F806.
  • the backlight package is white.
  • the Foster F806 is used as the whole surface of the mating surface encapsulant; the back encapsulant is entirely made of Foster F806 and white EVA layer.
  • EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min 100 parts of EVA pellets having a vinyl acetate content of 32% by weight and an MI of 40 g/10 min were added, and 6 parts of rutile-type titanium oxide and 0.5 part of ⁇ -methacryloxypropyltrimethoxysilane were added. 1 part of tert-butyl-(2-ethylhexyl)monoperoxycarbonate, 0.5 part of triallyl isocyanurate, 0.2 valence of 2-hydroxy-4-n-octyloxybenzophenone The machine is evenly mixed and used as a raw material for the encapsulant layer.
  • the photovoltaic glass, the face-up package, the cell sheet, the Foster F806, the white EVA layer, and the back sheet were laminated and laminated, and the module size was 45 ⁇ 45 cm, and the appearance was evaluated.
  • the lamination temperature was 145 ° C
  • the evacuation time was 5 minutes
  • the solar cell module was fabricated for 14 minutes to observe the appearance.
  • All the examples and comparative examples were laminated under the same lamination conditions, and the module size was 45 ⁇ 45 cm. Compare the appearance.
  • Test method first put the uncrosslinked encapsulant into the DSC instrument, and raise it from room temperature to 230 ° C, and then hold it at 230 ° C for 5 min to obtain uncrosslinked solidified crucible.
  • the test conditions were selected: heating rate 10 ° C / rain, purge gas N 2 , flow rate 30 ml / min.
  • the same quality cross-linked encapsulant was selected and tested under the same test conditions to obtain the remaining solidified crucible after cross-linking. By using the above formula to calculate, the degree of crosslinking of the cross-linked encapsulant can be obtained.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Laminated Bodies (AREA)
  • Photovoltaic Devices (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne une structure d'encapsulant pour cellule solaire, et un procédé pour sa fabrication. La structure d'encapsulant pour cellule solaire comprend une couche encapsulante et au moins une couche d'un film fonctionnel, ou comprend une couche encapsulante, au moins une couche d'un film fonctionnel, et au moins une couche de transition contiguë au film fonctionnel. Le film fonctionnel est combiné à la couche encapsulante, ou le film fonctionnel est combiné à la couche encapsulante et à la couche de transition. La fluidité du film fonctionnel est inférieure à celle de la couche encapsulante. Dans la présente invention, une couche d'un film fonctionnel ayant une fluidité relativement faible est combinée à un film encapsulant; comme la fluidité du film fonctionnel est inférieure à celle du film encapsulant, le film fonctionnel a plus de difficultés qu'un encapsulant à déborder, et on a un effet très souhaitable consistant à empêcher un débordement d'un encapsulant ayant une fluidité relativement élevée.
PCT/CN2015/000176 2014-03-20 2015-03-17 Structure d'encapsulant pour cellule solaire et son procédé de fabrication WO2015139516A1 (fr)

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CN111635706A (zh) * 2020-06-12 2020-09-08 常州斯威克光伏新材料有限公司 一种双面prec电池用抗pid封装胶膜及其制备方法
CN114763416A (zh) * 2021-01-15 2022-07-19 上海共城通信科技有限公司 一种介于表面带tco层的光伏电池和光伏组件封装胶膜之间的转光薄膜

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CN105315922A (zh) * 2015-11-23 2016-02-10 浙江昱辉阳光能源江苏有限公司 一种采用高反射率白色eva的高效太阳能组件
MX2019015062A (es) 2017-06-29 2020-02-13 Dow Global Technologies Llc Composicion de poliolefina.
CN107984658B (zh) * 2017-11-29 2020-07-03 阿特斯阳光电力集团有限公司 一种缩短层压时间的高效eva封装胶膜及其制备方法和应用
KR102602903B1 (ko) 2018-02-01 2023-11-17 다우 글로벌 테크놀로지스 엘엘씨 반-결정성 폴리올레핀 담체 수지를 갖는 마스터배치
CN109449236A (zh) * 2018-12-29 2019-03-08 陕西众森电能科技有限公司 一种异质结太阳电池间的互联模式
CN109810653A (zh) * 2019-02-22 2019-05-28 卡姆丹克太阳能（江苏）有限公司 一种太阳能电池封装膜
CN110010715B (zh) * 2019-05-08 2024-01-05 苏州赛伍应用技术股份有限公司 一种多层封装胶膜
CN111303782A (zh) * 2020-04-14 2020-06-19 杭州福斯特应用材料股份有限公司 一种光伏组件用封装胶膜及其制备方法

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CN107240618B (zh) * 2017-07-07 2023-09-22 环晟光伏(江苏)有限公司 一种poe双玻组件边缘溢胶改善结构
CN111635706A (zh) * 2020-06-12 2020-09-08 常州斯威克光伏新材料有限公司 一种双面prec电池用抗pid封装胶膜及其制备方法
CN114763416A (zh) * 2021-01-15 2022-07-19 上海共城通信科技有限公司 一种介于表面带tco层的光伏电池和光伏组件封装胶膜之间的转光薄膜

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