CN114854306A - Reflective coating and preparation method thereof, reflective piece and manufacturing method thereof, and double-sided photovoltaic module - Google Patents

Reflective coating and preparation method thereof, reflective piece and manufacturing method thereof, and double-sided photovoltaic module Download PDF

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CN114854306A
CN114854306A CN202210449135.0A CN202210449135A CN114854306A CN 114854306 A CN114854306 A CN 114854306A CN 202210449135 A CN202210449135 A CN 202210449135A CN 114854306 A CN114854306 A CN 114854306A
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reflective coating
water
reflective
parts
emulsion
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田晗旭
王鹏
陈良水
王岩
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Huansheng Photovoltaic Jiangsu Co Ltd
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Huansheng Photovoltaic Jiangsu Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
    • C09D125/02—Homopolymers or copolymers of hydrocarbons
    • C09D125/04—Homopolymers or copolymers of styrene
    • C09D125/08—Copolymers of styrene
    • C09D125/14—Copolymers of styrene with unsaturated esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
    • C09D143/04—Homopolymers or copolymers of monomers containing silicon
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/004—Reflecting paints; Signal paints
    • 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
    • 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
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/056—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means the light-reflecting means being of the back surface reflector [BSR] type
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/222—Magnesia, i.e. magnesium oxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • 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

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Abstract

The embodiment of the application provides a reflective coating and a preparation method thereof, a reflective piece and a manufacturing method thereof, and a double-sided photovoltaic module. The light-reflecting coating comprises the following components in parts by weight: 30-45 parts of water emulsion type polymer emulsion, 15-30 parts of water, 10-20 parts of pigment and filler, 20-35 parts of reflective material and 4-8 parts of auxiliary agent, wherein the water emulsion type polymer emulsion comprises polymer and water, and the content of the polymer in the water emulsion type polymer emulsion is 10-60 wt%. The reflectivity of a reflecting layer formed by the cured reflecting coating to visible light reaches over 85%, so that the reflectivity of the back plate can be effectively improved, the quantity of reflected light received by the back surface of the double-sided photovoltaic module comprising the back plate is improved, and the back surface power generation quantity of the double-sided photovoltaic module is improved; in addition, the curing temperature of the reflective coating is low, so that the toughening performance of the glass back plate is not affected.

Description

Reflective coating and preparation method thereof, reflective piece and manufacturing method thereof, and double-sided photovoltaic module
Technical Field
The application relates to the technical field of photovoltaic power generation, in particular to a reflective coating and a preparation method thereof, a reflective piece and a manufacturing method thereof, and a double-sided photovoltaic module.
Background
A photovoltaic module is a power generation device that can generate direct current under sunlight, and is composed of thin-body fixed photovoltaic cells made of semiconductor materials (e.g., silicon). When the photovoltaic module is used, the photovoltaic effect of the semiconductor material of the solar cell is mainly utilized to directly convert solar radiation energy into electric energy.
Along with the development of photovoltaic trade, photovoltaic module has gradually developed to two-sided photovoltaic module, two-sided photovoltaic module has the ability that positive and negative two sides all can generate electricity, however, two-sided photovoltaic module's the back must receive the reverberation as much as possible, just can realize more generated energy, and the reflectivity of the glass backplate among the two-sided photovoltaic module is the important factor that influences two-sided photovoltaic module's the back and receives the reflection light quantity, the luminous coating of printing is on the backplate to the mode that has improved the reflectivity of glass backplate, form the reflector layer after making luminous coating solidification, promote the reflectivity of glass backplate through the reflector layer, and then promote two-sided photovoltaic module's back generated energy.
However, the existing reflective coating is usually a high-temperature curing coating, and the curing temperature is generally above 650 ℃, so that the curing of the reflective coating is usually completed in the same high-temperature process with the tempering of the glass backboard, and because the heat conduction rate of the part of the glass backboard printed with the reflective coating is lower than that of the part of the glass backboard not printed with the reflective coating, the stress generated in different areas on the glass backboard during the tempering process is different, so that the tempering uniformity degree of the glass backboard is poor, and the phenomenon of poor impact resistance of the part of the glass backboard printed with the reflective coating can occur; in addition, if the printing and curing processes of the reflective coating are set before the tempering process of the glass back plate, the cured reflective coating still affects the tempering process of the glass back plate, so that the tempering uniformity of different areas on the glass back plate is different; if the printing and curing process of the reflective coating is arranged after the tempering process of the glass back plate, the tempering performance of the glass back plate is still affected due to the higher temperature of the curing process of the reflective coating.
Disclosure of Invention
The embodiment of the application provides a reflective coating and a preparation method thereof, a reflective piece and a manufacturing method thereof, and a double-sided photovoltaic module, wherein the reflective coating has a low curing temperature, and can be cured at a temperature of 70-150 ℃, so that the curing process of the reflective coating can be arranged after the tempering process of a glass backboard, and the tempering performance of the glass backboard cannot be affected due to the low curing temperature of the reflective coating.
In a first aspect, an embodiment of the present application provides a reflective coating, which includes, by weight: 30-45 parts of water emulsion type polymer emulsion, 15-30 parts of water, 10-20 parts of pigment and filler, 20-35 parts of reflective material and 4-8 parts of auxiliary agent, wherein the water emulsion type polymer emulsion comprises polymer and water, and the content of the polymer in the water emulsion type polymer emulsion is 10-60 wt%.
In some embodiments, the pigment filler includes one or more of titanium dioxide, kaolin, and barium sulfate; and/or
The reflecting material comprises one or more of pearlescent mica, zinc oxide, magnesium oxide, aluminum oxide and titanium dioxide; and/or
The water emulsion type polymer emulsion comprises one or more of organic silicon resin emulsion, styrene-acrylate emulsion, acrylic emulsion, organic silicon modified acrylic resin emulsion, water-based epoxy resin emulsion and water-based polyurethane emulsion; and/or
The auxiliary agent comprises one or more of a flatting agent, a dispersing agent, a defoaming agent, a thickening agent, a film-forming auxiliary agent and a preservative.
In a second aspect, an embodiment of the present application provides a method for manufacturing a reflective coating, including:
mixing raw materials including water emulsion type polymer emulsion, water, pigment and filler, a reflective material and an auxiliary agent to obtain a reflective coating;
the raw materials comprise the following components in parts by weight: 30-45 parts of water emulsion type polymer emulsion, 15-30 parts of water, 10-20 parts of pigment and filler, 20-35 parts of reflective material and 4-8 parts of auxiliary agent, wherein the water emulsion type polymer emulsion comprises polymer and water, and the content of the polymer in the water emulsion type polymer emulsion is 10-60 wt%.
In some embodiments, mixing the raw materials including the water emulsion polymer emulsion, water, pigment and filler, reflective material, and additives comprises:
putting the water emulsion type synthetic polymer emulsion into a container, starting stirring, wherein the rotating speed is 200 r/min-600 r/min;
adding the pigment and filler, a part of the auxiliary agent and a part of water into the container, and stirring at the rotating speed of 800 r/min-1200 r/min for 40 min-80 min;
adding the reflecting material and the rest water into the container, and stirring at the rotating speed of 800 r/min-1200 r/min for 60 min-100 min;
adding the rest of the auxiliary agent into the container, and stirring at the rotating speed of 200-600 r/min for 10-50 min.
In a third aspect, embodiments of the present application provide a reflector, including:
a body;
the reflective coating is formed by curing a reflective coating, and the reflective coating is the reflective coating or the reflective coating prepared by the preparation method of the reflective coating.
In a fourth aspect, an embodiment of the present application provides a method for manufacturing a light reflecting element, including:
providing a body;
the body is provided with the reflective coating, and the reflective coating is the reflective coating or the reflective coating prepared by the preparation method of the reflective coating;
and curing the reflective coating to form a reflective coating, thereby obtaining the reflective part.
In some embodiments, the curing the light reflecting coating includes:
and arranging the body attached with the reflective coating in a curing furnace, wherein the temperature in the curing furnace is 70-150 ℃.
In some embodiments, the material of the body is glass; the manufacturing method of the light reflecting piece further comprises the following steps: before the body is provided with the reflective coating, the body is subjected to toughening treatment.
In a fifth aspect, an embodiment of the present application provides a bifacial photovoltaic module, including:
double-sided battery pieces;
the back plate is arranged on one side of the double-sided battery piece and comprises a plate body and a reflective layer arranged on the plate body, the reflective layer is formed by curing a reflective coating, and the reflective coating is the reflective coating or the reflective coating prepared by the manufacturing method of the reflective coating.
In some embodiments, the number of the double-sided battery pieces is set to be multiple, a spacing region is arranged between adjacent double-sided battery pieces, and the light reflecting layer is arranged corresponding to the spacing region.
The reflectivity of a reflecting layer formed by the cured reflecting coating to visible light reaches more than 85%, so that the reflectivity of the back plate can be effectively improved, the quantity of reflected light received by the back surface of the double-sided photovoltaic module containing the back plate is improved, and the back surface power generation quantity of the double-sided photovoltaic module is improved; in addition, the curing temperature of the reflective coating is low, and the reflective coating can be cured at the temperature of 70-150 ℃, so that the curing process of the reflective coating can be arranged after the toughening process of the glass backboard, and the toughening performance of the glass backboard cannot be influenced due to the low curing temperature of the reflective coating.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of a light reflecting element according to an embodiment of the present application.
Fig. 2 is a flowchart of a method for manufacturing a light reflecting member according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a bifacial photovoltaic module provided in an embodiment of the present application.
Detailed Description
The technical solution in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a reflective coating, and the reflective coating comprises the following components in parts by weight: 30-45 parts of water emulsion type polymer emulsion, 15-30 parts of water, 10-20 parts of pigment and filler, 20-35 parts of reflective material and 4-8 parts of auxiliary agent, wherein the water emulsion type polymer emulsion comprises polymer and water, and the content of the polymer in the water emulsion type polymer emulsion is 10-60 wt%.
Illustratively, the parts of the water-emulsion polymer emulsion may be 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 45 parts, and the like.
Illustratively, the parts of water may be 15 parts, 17 parts, 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, and the like. Illustratively, the water may be deionized water, distilled water, or the like.
Illustratively, the parts of pigment and filler may be 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, etc.
Illustratively, the number of parts of the light reflecting material may be 20, 22, 24, 26, 28, 30, 32, 35, etc.
Illustratively, the portion of the adjuvant may be 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, etc.
Illustratively, the amount of polymer in the water-emulsion polymer emulsion can be 10 wt%, 15 wt%, 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%, 45 wt%, 55 wt%, 60 wt%, etc.
Illustratively, the particle size of the polymer in the water emulsion polymer emulsion may be from 75nm to 480nm, such as 75nm, 100nm, 150nm, 200nm, 250nm, 300nm, 350nm, 400nm, 450nm, 480nm, and the like.
Illustratively, the water-emulsion polymer emulsion includes one or more of a silicone resin emulsion, a styrene-acrylate emulsion, an acrylic emulsion, a silicone-modified acrylic resin emulsion, an aqueous epoxy resin emulsion, and an aqueous polyurethane emulsion. It is understood that acrylic emulsion refers to an emulsion resulting from copolymerization of acrylic monomers.
Illustratively, the particle size of the pigment filler, the particle size of the light reflecting material, and the particle size of the auxiliary may each be 10nm to 30 μm, such as 10nm, 50nm, 100nm, 500nm, 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, and the like.
It should be noted that the pigment and filler mainly serve to make the color of the reflective paint appear white, because the reflective performance is optimal when the color of the reflective material is white. Illustratively, the pigment filler may include one or more of titanium dioxide, kaolin, and barium sulfate.
Illustratively, the particle size of the titanium dioxide may be 0.15 μm to 0.4 μm, such as 0.15 μm, 0.2 μm, 0.25 μm, 0.3 μm, 0.35 μm, 0.4 μm, and the like.
Illustratively, the particle size of the kaolin can be from 0.2 μm to 1 μm, such as 0.2 μm, 0.4 μm, 0.8 μm, 1 μm, and the like.
Illustratively, the particle size of the barium sulfate may be 0.04 μm to 1 μm, such as 0.04 μm, 0.1 μm, 0.3 μm, 0.5 μm, 0.8 μm, 1 μm, and the like.
It should be noted that the reflective material mainly actsThe aim is to improve the reflective performance of the reflective coating. Illustratively, the reflective material includes pearl mica, zinc oxide (ZnO), magnesium oxide (MgO), aluminum oxide (Al) 2 O 3 ) And titanium dioxide.
It is worth mentioning that, because the reflective materials such as zinc oxide, magnesium oxide and aluminum oxide have stronger heat conductivity, these reflective materials not only can promote the reflective performance of reflective coating, but also can promote the heat conductivity of reflective coating, and in the curing process of reflective coating, because the heat conductivity of reflective coating is better, therefore can realize faster solidification rate, shorten the time of curing process and promote the curing effect.
Illustratively, the particle size of the pearlescent mica can be 2 μm to 30 μm, such as 2 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, and the like.
Illustratively, the particle size of the zinc oxide can be 10 μm to 12 μm, such as 10 μm, 10.5 μm, 11 μm, 11.5 μm, 12 μm, and the like.
Illustratively, the particle size of the magnesium oxide may be 12 μm to 15 μm, such as 12 μm, 13 μm, 14 μm, 15 μm, and the like.
Illustratively, the particle size of the alumina can be 2 μm to 5 μm, such as 2 μm, 3 μm, 4 μm, 5 μm, and the like.
Illustratively, the particle size of the titanium dioxide can be 0.15 μm to 0.4 μm, such as 0.15 μm, 0.2 μm, 0.25 μm, 0.3 μm, 0.35 μm, 0.4 μm, and the like.
Illustratively, the auxiliaries include one or more of leveling agents, dispersants, defoamers, thickeners, film-forming aids, and preservatives.
The reflectivity of a reflecting layer formed by the cured reflecting coating to visible light reaches over 85%, so that the reflectivity of the back plate can be effectively improved, the quantity of reflected light received by the back surface of the double-sided photovoltaic module comprising the back plate is improved, and the back surface power generation quantity of the double-sided photovoltaic module is improved; in addition, the curing temperature of the reflective coating is low, and the reflective coating can be cured at the temperature of 70-150 ℃, so that the curing process of the reflective coating can be arranged after the toughening process of the glass backboard, and the toughening performance of the glass backboard cannot be influenced due to the low curing temperature of the reflective coating.
The embodiment of the application also provides a manufacturing method of the reflective coating, which can be used for preparing the reflective coating in any embodiment, and the manufacturing method of the reflective coating can comprise the following steps:
mixing raw materials including water emulsion type polymer emulsion, water, pigment and filler, a reflective material and an auxiliary agent to obtain a reflective coating;
the raw materials comprise the following components in parts by weight: 30-45 parts of water emulsion type polymer emulsion, 15-30 parts of water, 10-20 parts of pigment and filler, 20-35 parts of reflective material and 4-8 parts of auxiliary agent, wherein the water emulsion type polymer emulsion comprises polymer and water, and the content of the polymer in the water emulsion type polymer emulsion is 10-60 wt%.
The components of the water emulsion type polymer emulsion, water, pigment and filler, reflective material, and auxiliary agent are described in detail above, and are not described herein again.
Illustratively, "mixing raw materials including the water-emulsion type polymer emulsion, water, pigments and fillers, the light reflecting material and the auxiliary agents" may specifically include:
s110, putting the water emulsion type synthetic polymer emulsion into a container, starting stirring, and controlling the rotation speed to be 200 r/min-600 r/min (for example, 400 r/min).
S120, adding the pigment and filler, a part of the auxiliary agent and a part of water into a container, stirring at the rotating speed of 800 r/min-1200 r/min (for example, 1000r/min) for 40 min-80 min (for example, 60min) until the mixture is uniform and free of agglomeration.
For example, the auxiliary agent used in the method for manufacturing the reflective coating may include a dispersant, a leveling agent, and an antifoaming agent, and in S120, a portion of the auxiliary agent may be a dispersant.
S130, adding the reflective material and the rest water into a container, stirring at the rotating speed of 800 r/min-1200 r/min (such as 1000r/min) for 60 min-100 min (such as 80min) until the reflective material and the rest water are uniform and have no caking.
S140, adding the rest of the auxiliary agent into a container, stirring the mixture until the mixture is uniform, and stirring the mixture for 10min to 50min (for example, 30min) at the rotating speed of 200r/min to 600r/min (for example, 400 r/min).
Illustratively, in the manufacturing method of the reflective coating, when the auxiliary agent includes a dispersing agent, a leveling agent, and an antifoaming agent, in S140, the remaining auxiliary agent refers to the leveling agent and the antifoaming agent.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a reflector according to an embodiment of the present disclosure, and an embodiment of the present disclosure provides a reflector 10, which includes a main body 11 and a reflective coating 12 disposed on the main body 11, where the reflective coating 12 is formed by curing a reflective paint, and the reflective paint may be the reflective paint in any of the embodiments described above or the reflective paint prepared by the method for manufacturing the reflective paint in any of the embodiments described above.
Exemplarily, the reflector 10 may be a back plate applied to a double-sided photovoltaic module, the body 11 may be made of glass, the number of the reflective coatings 12 disposed on the body 11 may be multiple, and the multiple reflective coatings 12 are disposed at intervals.
Illustratively, the reflective coating 12 has a reflectivity of 85% or more, such as 85%, 87%, 90%, 92%, 95%, 97%, 99%, etc., to visible light.
Referring to fig. 2, and referring to fig. 1, fig. 2 is a flowchart of a method for manufacturing a reflective element according to an embodiment of the present disclosure, where the method for manufacturing a reflective element according to the embodiment of the present disclosure is used to prepare a reflective element according to any of the embodiments, and the method for manufacturing a reflective element may include:
s210, providing the body 11.
Illustratively, the body 11 may be a glass plate.
S220, a reflective coating is disposed on the body 11, and the reflective coating may be the reflective coating in any of the above embodiments or the reflective coating manufactured by the manufacturing method of the reflective coating in any of the above embodiments.
Illustratively, the light reflecting paint may be disposed on the body 11 by screen printing.
For example, before the reflective coating is disposed on the body 11, the method for manufacturing the reflective part may further include the steps of sequentially performing edge grinding, hole punching and cleaning on the body 11. It can be understood that the corners of the body 11 can form smooth radians by edging, thereby avoiding injury to related personnel; through holes are formed in the body 11, through holes can be formed in the body 11, and the through holes can be used for leading wires for connecting the double-sided battery piece 20 and the junction box to pass through; through rinsing body 11, can improve the cleanliness factor on body 11 surface, and then promote the adhesive force between reflective coating and the body 11.
And S230, curing the reflective coating to form a reflective coating 12, so as to obtain the reflective part 10.
By way of example, "curing the retroreflective paint" may specifically include:
the body 11 with the light reflecting paint attached is set inside a curing furnace at 70-150 deg.c, such as 70 deg.c, 80 deg.c, 90 deg.c, 100 deg.c, 110 deg.c, 120 deg.c, 130 deg.c, 140 deg.c, 150 deg.c, etc. It can be seen that this temperature range is much lower than the tempering temperature of glass (around 700 ℃).
Illustratively, when the material of the body 11 is glass, the method for manufacturing the light reflector may further include: before the body 11 is provided with the reflective coating, the body 11 is toughened. That is, the manufacturing method of the reflector sequentially comprises the steps of tempering the body 11, arranging the reflective coating on the body 11, and curing the reflective coating. By firstly carrying out toughening treatment on the body 11, the problem that the toughening degrees of different regions of the body 11 are different due to the fact that the heat conduction rates of the part of the body 11 provided with the reflective coating and the part of the body 11 not provided with the reflective coating are different in the toughening treatment process of the body 11 can be avoided, and the toughening degrees of different regions of the body 11 are uniform; in addition, in the process of curing the reflective coating, the curing temperature of the reflective coating is low, so that the toughening performance of the body 11 is not affected.
Illustratively, "forming the reflective coating 12" may be achieved by a printing process and a curing process, or by a printing process and a curing process, where the printing process and the curing process are performed for a plurality of times, and the reflective coating with a predetermined amount is divided into a plurality of portions and printed on the body 11 for a plurality of times, and after the first printing is completed, the first curing is performed, and then the second printing and the second curing are performed until the printing of the reflective coating with a predetermined amount on the body 11 is completed, it can be understood that the scheme of printing the reflective coating on the body 11 for a plurality of times has the advantages of small single printing amount, fast single curing rate, short single curing time, and the like.
After curing the reflective coating to form the reflective coating 12 to obtain the retroreflective element 10, the method for manufacturing the retroreflective element may further include the steps of sequentially cleaning and packaging the retroreflective element 10.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a double-sided photovoltaic module according to an embodiment of the present disclosure, which provides a double-sided photovoltaic module 100 including a double-sided battery piece 20 and a back plate 30, where the back plate 30 is disposed on one side of the double-sided battery piece 20, the back plate 30 includes a plate body 31 and a reflective layer 32 disposed on the plate body 31, and the reflective layer 32 is formed by curing a reflective paint, where the reflective paint may be the reflective paint in any one of the embodiments described above or the reflective paint prepared by the method for manufacturing the reflective paint in any one of the embodiments described above.
Illustratively, the light-reflective layer 32 has a reflectance of 85% or more, e.g., 85%, 87%, 90%, 92%, 95%, 97%, 99%, etc., with respect to visible light.
Referring to fig. 3, the number of the double-sided battery pieces 20 may be multiple, a spacing region is disposed between adjacent double-sided battery pieces 20, and the light-reflecting layer 32 is disposed corresponding to the spacing region. In some embodiments, a spacing region is disposed between any two adjacent double-sided battery pieces 20, and a reflective layer 32 is disposed on the back plate 30 at a position corresponding to any one spacing region. In the embodiment of the present application, the plurality may be two or more, for example, three, four, five, six, seven, eight, and the like.
Referring to fig. 3, the double-sided photovoltaic module 100 may further include a cover plate 40, the cover plate 40 is disposed on a side of the double-sided battery piece 20 away from the back plate 30, and the cover plate 40 and the back plate 30 respectively protect the double-sided battery piece 20 from two sides thereof.
Referring to fig. 3, the double-sided photovoltaic module 100 may further include a first encapsulation layer 51, where the first encapsulation layer 51 may be disposed between the double-sided battery piece 20 and the back plate 30 to block water vapor, so as to prevent water vapor from entering the double-sided battery piece 20 and affecting the electrical performance of the double-sided battery piece 20, and when the back plate 30 is made of glass, sodium ions in the glass can be prevented from entering the double-sided battery piece 20 and affecting the electrical performance of the double-sided battery piece 20. Illustratively, the material of the first encapsulation layer 51 may be EVA (Ethylene-vinyl acetate Copolymer), POE (Polyolefin Elastomer), or other organic materials.
Referring to fig. 3, the double-sided photovoltaic module 100 may further include a second encapsulation layer 52, where the second encapsulation layer 52 may be disposed between the double-sided battery piece 20 and the cover plate 40 to block water vapor, so as to prevent water vapor from entering the double-sided battery piece 20 and affecting the electrical performance thereof, and when the cover plate 40 is made of glass, sodium ions in the glass can be prevented from entering the double-sided battery piece 20 and affecting the electrical performance thereof. Illustratively, the material of the second encapsulation layer 52 may be an organic material such as EVA (Ethylene-vinyl Acetate Copolymer), POE (Polyolefin Elastomer), and the like.
The reflective coating and the preparation method thereof, the reflective piece and the manufacturing method thereof, and the double-sided photovoltaic module provided by the embodiment of the application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. The light reflecting coating is characterized by comprising the following components in parts by weight: 30-45 parts of water emulsion type polymer emulsion, 15-30 parts of water, 10-20 parts of pigment and filler, 20-35 parts of reflective material and 4-8 parts of auxiliary agent, wherein the water emulsion type polymer emulsion comprises polymer and water, and the content of the polymer in the water emulsion type polymer emulsion is 10-60 wt%.
2. The reflective coating of claim 1 wherein said pigment and filler includes one or more of titanium dioxide, kaolin and barium sulfate; and/or
The reflecting material comprises one or more of pearlescent mica, zinc oxide, magnesium oxide, aluminum oxide and titanium dioxide; and/or
The water emulsion type polymer emulsion comprises one or more of organic silicon resin emulsion, styrene-acrylate emulsion, acrylic emulsion, organic silicon modified acrylic resin emulsion, water-based epoxy resin emulsion and water-based polyurethane emulsion; and/or
The auxiliary agent comprises one or more of a flatting agent, a dispersing agent, a defoaming agent, a thickening agent, a film-forming auxiliary agent and a preservative.
3. A manufacturing method of a reflective coating is characterized by comprising the following steps:
mixing raw materials including water emulsion type polymer emulsion, water, pigment and filler, a reflective material and an auxiliary agent to obtain a reflective coating;
the raw materials comprise the following components in parts by weight: 30-45 parts of water emulsion type polymer emulsion, 15-30 parts of water, 10-20 parts of pigment and filler, 20-35 parts of reflective material and 4-8 parts of auxiliary agent, wherein the water emulsion type polymer emulsion comprises polymer and water, and the content of the polymer in the water emulsion type polymer emulsion is 10-60 wt%.
4. The method for preparing the reflective coating according to claim 3, wherein the mixing of the raw materials including the water emulsion type polymer emulsion, water, the pigment and filler, the reflective material and the auxiliary agent comprises:
putting the water emulsion type synthetic polymer emulsion into a container, starting stirring, wherein the rotating speed is 200 r/min-600 r/min;
adding the pigment and filler, a part of the auxiliary agent and a part of water into the container, and stirring at the rotating speed of 800 r/min-1200 r/min for 40 min-80 min;
adding the reflecting material and the rest water into the container, and stirring at the rotating speed of 800 r/min-1200 r/min for 60 min-100 min;
adding the rest of the auxiliary agent into the container, and stirring at the rotating speed of 200-600 r/min for 10-50 min.
5. A retroreflective article, comprising:
a body;
the reflective coating is arranged on the body and formed by curing a reflective coating, and the reflective coating is the reflective coating as claimed in claim 1 or 2 or the reflective coating prepared by the manufacturing method of the reflective coating as claimed in claim 3 or 4.
6. A method of making a retroreflective article, comprising:
providing a body;
arranging a reflective coating on the body, wherein the reflective coating is the reflective coating as claimed in claim 1 or 2 or the reflective coating prepared by the manufacturing method of the reflective coating as claimed in claim 3 or 4;
and curing the reflective coating to form a reflective coating, thereby obtaining the reflective part.
7. The method of claim 6, wherein said curing said retroreflective coating includes:
and arranging the body attached with the reflective coating in a curing furnace, wherein the temperature in the curing furnace is 70-150 ℃.
8. A method of making a reflector according to claim 6 or 7 wherein the body is made of glass; the manufacturing method of the light reflecting piece further comprises the following steps: before the body is provided with the reflective coating, the body is subjected to toughening treatment.
9. A bifacial photovoltaic module, comprising:
double-sided battery pieces;
the back plate is arranged on one side of the double-sided battery piece and comprises a plate body and a reflective layer arranged on the plate body, the reflective layer is formed by curing a reflective coating, and the reflective coating is the reflective coating as claimed in claim 1 or 2 or the reflective coating prepared by the manufacturing method of the reflective coating as claimed in claim 3 or 4.
10. The bifacial photovoltaic module of claim 9, wherein the number of bifacial cell pieces is arranged to be plural, a spacing region is arranged between adjacent bifacial cell pieces, and the light reflecting layer is arranged corresponding to the spacing region.
CN202210449135.0A 2022-04-26 2022-04-26 Reflective coating and preparation method thereof, reflective piece and manufacturing method thereof, and double-sided photovoltaic module Pending CN114854306A (en)

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WO2011099390A1 (en) * 2010-02-10 2011-08-18 Fujifilm Corporation Solar cell backsheet and solar cell module
US20110315189A1 (en) * 2009-03-03 2011-12-29 Arkema France Acrylic photovoltaic module backsheet
CN104070734A (en) * 2013-03-27 2014-10-01 常州亚玛顿股份有限公司 Coated glass with high reflectivity and preparation method of coated glass
CN208608209U (en) * 2018-07-09 2019-03-15 上海晶澳太阳能科技有限公司 A kind of two-sided double glass photovoltaic modulies of slice
CN110358443A (en) * 2019-07-16 2019-10-22 厦门威亮光学涂层技术有限公司 A kind of chalk and coated glass backboard and its preparation method and application and double glass solar photovoltaic assemblies

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110315189A1 (en) * 2009-03-03 2011-12-29 Arkema France Acrylic photovoltaic module backsheet
WO2011099390A1 (en) * 2010-02-10 2011-08-18 Fujifilm Corporation Solar cell backsheet and solar cell module
CN104070734A (en) * 2013-03-27 2014-10-01 常州亚玛顿股份有限公司 Coated glass with high reflectivity and preparation method of coated glass
CN208608209U (en) * 2018-07-09 2019-03-15 上海晶澳太阳能科技有限公司 A kind of two-sided double glass photovoltaic modulies of slice
CN110358443A (en) * 2019-07-16 2019-10-22 厦门威亮光学涂层技术有限公司 A kind of chalk and coated glass backboard and its preparation method and application and double glass solar photovoltaic assemblies

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