WO2023151634A1

WO2023151634A1 - Black weather-resistant layer, photovoltaic module and color photovoltaic module

Info

Publication number: WO2023151634A1
Application number: PCT/CN2023/075343
Authority: WO
Inventors: 王申存; 张松; 单康康
Original assignee: 隆基乐叶光伏科技有限公司
Priority date: 2022-02-10
Filing date: 2023-02-10
Publication date: 2023-08-17
Also published as: CN114823955A; CN116082777A; CN219476698U

Abstract

Disclosed is a black weather-resistant layer. The black weather-resistant layer comprises the following components: 80-100 parts of a weather-resistant resin substrate, 40-120 parts of a solvent, 10-50 parts of a black pigment, 5-20 parts of a filler, 1-20 parts of a silane coupling agent, 3-30 parts of a curing agent and 1-5 parts of an auxiliary agent. The present application further provides a photovoltaic module and a color photovoltaic module. According to the photovoltaic module provided by the present application, due to the action of a reinforced adhesive film layer, an internal adhesive film layer of the photovoltaic module still has high elastic modulus and strength under a high-temperature condition of normal operation, so that the photovoltaic module has relatively high safety.

Description

A black weather-resistant layer, a photovoltaic module and a colored photovoltaic module

Cross References to Related Applications

This disclosure claims the priority of the patent application submitted to the China Patent Office on February 10, 2022, with the application number 202210126018.0, entitled "A Color Photovoltaic Device", and submitted to the China Patent Office on January 19, 2023, with the application number The priority of the patent application 202310076621.7 titled "A Black Weather-resistant Layer, Photovoltaic Module, and Color Photovoltaic Module", the entire content of which is incorporated in this disclosure by reference.

technical field

The present application relates to the technical field of solar cells, in particular to a black weather-resistant layer, a photovoltaic module and a colored photovoltaic module.

Background technique

As a tool for receiving and converting light energy, photovoltaic modules have achieved high efficiency after long-term technical updates and iterations, and have been widely used in large-scale ground power stations. With the increase in photovoltaic installations, the use of ground resources has become saturated, and a large building area is the best choice for installing photovoltaics as a receiving surface for sunlight. The installation of photovoltaics on buildings can increase energy income on the one hand, and reduce building energy consumption on the other hand. At the same time, building power generation can be self-contained, reducing the loss of long-distance power transmission. However, photovoltaic cells are usually dark blue or black in color, which is relatively monotonous and cannot meet the diverse appearance requirements of buildings. Thin-film cell technologies include cadmium telluride, copper indium gallium selenide, etc. in the photovoltaic cell technology, and the efficiency of these technologies is usually low. As a mature photovoltaic power generation technology, the efficiency of crystalline silicon has reached more than 24% in mass production, so it is the preferred technology for building photovoltaic integration. The method to realize the diverse color requirements of photovoltaic modules is to add inorganic or organic pigments to the film, such as colored film. On the one hand, this method will greatly reduce the efficiency of photovoltaic modules due to the absorption of light by pigments. On the other hand, it has the risk of fading, so it is not a good choice for the color of photovoltaic modules. There is also a colored coating layer on the surface of the cell, but this method is difficult to control the thickness of the coating layer, the color is difficult to achieve uniformity, and the appearance is ugly.

On the other hand, when photovoltaic modules are used on buildings, especially when they are used on facades, their safety performance is a very important control performance. As a kind of laminated glass, photovoltaic modules are not easy to fall from high places due to the existence of packaging film after being broken, so they have certain safety attributes. This security is The strength of the resistance is directly related to the characteristics of the packaging film used, especially the modulus of elasticity. Commonly used encapsulation films include EVA, POE, PVB, etc. The physical properties of these films are that their elastic modulus gradually decreases with the increase of temperature. EVA, POE, and PVB all have glass transition points lower than normal temperature. When the temperature is higher than 50 ° C, their elastic modulus will decrease. There is a sharp drop. Its strength has been so weak that it can be ignored compared with glass. However, as an electrical unit, a photovoltaic module will have an operating temperature of 30 to 40 degrees Celsius higher than the ambient temperature when it is exposed to the sun to generate electricity outdoors. For example, in summer, the temperature can reach 80°C or even higher. At this temperature, the strength of the EVA, POE, PVB and other packaging films inside the photovoltaic module will be very low. At this time, if the module is damaged by external force, the damaged module may fall under its own weight and hurt people. And summer is a season of extreme weather such as large hail and strong winds, and this risk is very high.

Contents of the invention

In view of the above problems, the present application proposes a black weather-resistant layer that can absorb visible light and has a high reflectivity for infrared light, a photovoltaic module, and a colored photovoltaic module with the black weather-resistant layer.

The application provides a black weather-resistant layer, comprising the following components:

80-100 parts of weather-resistant resin substrate, 40-120 parts of solvent, 10-50 parts of black pigment, 5-20 parts of filler, 1-20 parts of silane coupling agent, 3-30 parts of curing agent , the auxiliary agent is 1-5 parts.

Further, the weather-resistant resin substrate is selected from acrylic resin, polyester resin, fluorocarbon resin, epoxy resin, vinylidene fluoride, trifluoroethylene-vinyl ether copolymer, trifluoroethylene-vinyl ester copolymer, At least one of tetrafluoroethylene-vinyl ether copolymer and isocyanate, preferably acrylic resin or fluorocarbon resin;

The solvent is selected from at least one of toluene, xylene, ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, methyl ethyl ketone, methyl isobutyl ketone and N-methylpyrrolidone, preferably Butyl acetate;

The black pigment is selected from at least one of iron chrome black, iron chrome black, copper chrome black, iron manganese black, aniline black, and perylene black, preferably iron chrome black;

The filler is at least one selected from glass powder, ceramic powder, white carbon black and alumina, preferably white carbon black;

The curing agent is at least one of an isocyanate curing agent, an imidazole curing agent, an amine curing agent and a dicyandiamide curing agent, preferably an isocyanate curing agent;

The silane coupling agent is selected from at least One, preferably gamma-aminopropyltriethoxysilane;

The auxiliary agent is selected from emulsified silicone oil, high carbon alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene alcohol amine ether, polyoxypropylene glycerin ether, polyoxypropylene polyoxyethylene glycerin One of ether or polydimethylsiloxane; preferably polydimethylsiloxane.

Further, the particle size of the black pigment is 5-50 μm; the particle size of the filler is 1-5 μm.

Further, the black weather-resistant layer is a grid-shaped film layer.

Further, the reflectance of the black weather-resistant layer for visible light is lower than 10%, and the reflectance for infrared light with a wavelength above 750nm is higher than 30%.

The present application provides a photovoltaic module, comprising a back plate, a first lower flexible adhesive film layer, a reinforced adhesive film layer, a second lower flexible adhesive film layer, a cell sheet layer and a front plate which are sequentially stacked.

Further, the first lower flexible adhesive film layer and the second lower flexible adhesive film layer are all selected from one of EVA film layer, POE film layer, PVB film layer or SGP film layer;

The thickness of the first lower flexible film layer is 0.1-2mm;

The thickness of the second lower flexible film layer is 0.1-2mm.

Further, the reinforced adhesive film layer is one of PET film layer, PU film layer, nylon layer or wire mesh layer;

The thickness of the reinforced film layer is 0.1-1 mm.

Further, on the side surface of the backboard away from the first lower flexible adhesive film layer, between the backboard and the first lower flexible adhesive film layer, the first lower flexible adhesive between the film layer and the reinforced adhesive film layer, between the reinforced adhesive film layer and the second lower flexible adhesive film layer, and at any position between the second lower flexible adhesive film layer and the battery sheet Has a black weather resistant layer.

Further, the backplane is one of glass backplane, metal backplane, organic backplane, inorganic backplane or composite material backplane.

Further, the front plate is an upper colored glass layer or an upper transparent layer.

Further, the photovoltaic module includes a rear glass layer, a first lower flexible adhesive film layer, a reinforced adhesive film layer, a second lower flexible adhesive film layer, a cell sheet layer and an upper colored glass layer stacked in sequence.

Further, the black weather-resistant layer is the aforementioned black weather-resistant layer.

The application provides a color photovoltaic module, which includes a rear glass layer, an adhesive film layer, Cell layer and upper colored glass layer;

On the side surface of the back glass layer away from the adhesive film layer, between the back glass layer and the adhesive film layer, at any position between the adhesive film layer and the battery sheet, or in the adhesive film layer black weathering layer;

The reflectance of the black weather-resistant layer for visible light is lower than 10%, and the reflectance for infrared light with a wavelength above 750nm is higher than 30%.

Further, the adhesive film layer is composed of an adhesive film, and the adhesive film is selected from any one of a single-layer adhesive film, a double-layer adhesive film or a three-layer adhesive film and the above.

Further, the adhesive film is a flexible adhesive film or a reinforced adhesive film or a laminated adhesive film of a flexible adhesive film and a reinforced adhesive film;

The reinforced adhesive film layer is one of PET film layer, PU film layer, nylon layer or wire mesh layer;

The thickness of the reinforced film layer is 0.1-1mm.

Further, the adhesive film layer is a first lower flexible adhesive film layer, a reinforced adhesive film and a second lower flexible adhesive film layer which are stacked in sequence.

Further, the adhesive film layer is a first lower flexible adhesive film layer, a reinforced adhesive film, a black weather-resistant layer and a second lower flexible adhesive film layer which are stacked in sequence.

Further, the upper stained glass layer includes an upper adhesive film layer, a colored glaze layer and a front glass layer arranged in sequence from bottom to top, and the surface of the upper adhesive film layer away from the colored glaze layer is in contact with the The battery sheets are connected together.

Further, the upper adhesive film layer is a colorless transparent adhesive film layer with a thickness of 0.1-2mm.

Further, the upper colored glass layer includes an upper adhesive film layer and a front glass layer arranged in sequence, and the surface of the upper adhesive film layer away from the front glass layer is connected to the battery sheet.

Further, the upper adhesive film layer is a colored transparent adhesive film layer with a thickness of 0.1-2mm.

Further, the front glass layer is transparent glass with a thickness of 1-16mm.

Further, an anti-reflection layer is provided on one side surface of the front glass layer.

Further, the black weather-resistant layer is the black weather-resistant layer described in any one of claims 1-5.

The present application also provides a method for preparing a colored photovoltaic device, comprising the following steps:

Provide back glass layer,

A three-layer composite film is provided, and the three-layer composite film includes a first lower layer of flexible layers stacked together sequentially. an adhesive film layer, a reinforced adhesive film layer, and a second lower flexible adhesive film layer;

Laminating the first lower flexible adhesive film layer and the back glass together;

A battery sheet layer is arranged on the surface of the second lower flexible adhesive film layer away from the reinforced adhesive film layer;

The upper material glass layer is arranged on the side surface of the battery sheet layer away from the second lower flexible adhesive film layer.

Further, after corona treatment is performed on the two surfaces of the reinforced adhesive film layer, they are respectively pressed together with the first lower flexible adhesive film layer and the second lower flexible adhesive film layer, thereby forming the three-layer Composite film.

The black weather-resistant layer provided by this application can absorb visible light, and it has high reflectivity for infrared light.

In the photovoltaic module provided by this application, due to the effect of the reinforced adhesive film layer, the inner adhesive film layer of the photovoltaic module still has a high elastic modulus and strength under the high temperature condition of normal operation, so that the photovoltaic module Components have high security.

In the color photovoltaic module described in this application, after corona treatment is performed on the two surfaces of the reinforced adhesive film layer, they are respectively pressed with the first lower flexible adhesive film layer and the second lower flexible adhesive film layer, so that Layered together, a high interlayer bonding capability is guaranteed.

The color photovoltaic module described in this application, because the black weather-resistant layer can absorb visible light, thereby avoiding the difference in reflection of incident light between the cell area and the cell gap area, resulting in uneven color rendering of the photovoltaic module and color difference or failure to develop color, thereby affecting Overall aesthetics, the addition of the black weather-resistant layer absorbs visible light, thereby ensuring the overall color rendering and aesthetics of the photovoltaic module. At the same time, the black weather-resistant layer has a high reflectivity for infrared light, and the infrared light reflected by the black weather-resistant layer Light can be absorbed by the battery sheet, so the photovoltaic module described in this application can further improve the power generation efficiency of the photovoltaic module when realizing color.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present application. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of the color photovoltaic module provided by the present application.

Fig. 2 is a schematic structural diagram of the color photovoltaic module provided by the present application.

FIG. 3 is a graph of light transmittance and monochromatic reflectance of the color photovoltaic module in Example 1 of the present application.

Fig. 4 is a schematic structural diagram of the color photovoltaic module provided by the present application.

Fig. 5 is a schematic structural diagram of the color photovoltaic module provided by the present application.

Fig. 6 is a schematic structural diagram of the color photovoltaic module provided by the present application.

Explanation of reference signs:

1-front glass layer, 2-color glaze layer, 3-upper film layer, 4-battery sheet layer, 5-second lower flexible film layer, 6-reinforced film layer, 7-first lower flexible film layer Film layer, 8-back glass layer, 9-black weather-resistant layer.

specific embodiment

The following describes the exemplary embodiments of the present application, including various details of the embodiments of the present application to facilitate understanding, and they should be considered as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness. In this application, the upper and lower positions are determined according to the incident direction of light, and the incident light is up.

The application provides a black weather-resistant layer, which includes the following components: 80-100 parts of weather-resistant resin substrate, 40-120 parts of solvent, 10-50 parts of black pigment, 5-20 parts of filler, silane coupling The curing agent is 1-20 parts, the curing agent is 3-30 parts, and the auxiliary agent is 1-5 parts.

In the present application, the raw materials of the black weather-resistant layer 9 are 80-100 parts of weather-resistant resin substrate, 40-120 parts of solvent, 10-50 parts of black pigment, 5-20 parts of filler, silane coupling The agent is 1-20 parts, the curing agent is 3-30 parts, and the auxiliary agent is 1-5 parts.

By using 80-100 parts of weather-resistant resin substrate, 40-120 parts of solvent, 10-50 parts of black pigment, 5-20 parts of filler, 1-20 parts of silane coupling agent, and 3- 30 parts, 1-5 parts of additives are mixed, and the black weather-resistant layer 9 is formed after heating and curing.

Specifically, the mass ratio of the weather-resistant resin substrate, solvent, black pigment, filler, silane coupling agent, curing agent and auxiliary agent is (80-100): (40-120): (10-50): (5~20): (1~20): (3-30): (1-5).

Further specifically, the mass ratio of the weather-resistant resin substrate, solvent and black colorant can be 80:40:10, 80:50:10, 80:60:10, 80:70:10, 80:80:10 , 80:90:10, 80:100:10, 80:110:10, 80:120:10, 80:40:20, 80:40:30, 80:40:40, 80:40:50, 90 :40:10, 90:40:10, 90:40:10, 90:50:20, 90:50:30, 90:50:40, 90:50:50, 90:60:20, 90:60 :30, 90:60:40, 90:60:50, 90:70:20, 90:70:30, 90:70:40, 90:70:50, 90:80:20, 90:80:30 , 90:80:40, 90:80:50, 90:90:20, 90:90:30, 90:90:40, 90:90:50, 90:100:20, 90:100:30, 90 :100:40, 90:100:50, 90:110:20, 90:110:30, 90:110:40, 90:110:50, 90:120:20, 90:120:30, 90:120 :40, 90:120:50.

The weather-resistant resin substrate is selected from acrylic resin, polyester resin, fluorocarbon resin, epoxy resin, vinylidene fluoride (PVDF), trifluoroethylene-vinyl ether copolymer, trifluoroethylene-vinyl ester copolymer, At least one of tetrafluoroethylene-vinyl ether copolymer and isocyanate is preferably an acrylic resin or a fluorocarbon resin.

The solvent is at least one of toluene, xylene, ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, methyl ethyl ketone, methyl isobutyl ketone and N-methylpyrrolidone; preferably acetic acid butyl ester.

The black pigment is at least one of iron chrome black, copper chrome black, iron manganese black, aniline black, perylene black, preferably iron chrome black, more preferably Fe/Cr molar ratio is the precursor of 0.5, after Iron chromium black with high crystallinity Cr _1.3 Fe _0.7 O ₃ main crystal phase formed by calcination at 900°C.

The particle size of the black pigment is 5-50 μm, for example, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm or 50 μm.

The filler is at least one of glass powder, ceramic powder, white carbon black and alumina, preferably white carbon black. The particle size of the filler is 1-5 μm, for example, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm.

The silane coupling agent is selected from one of γ-aminopropyltriethoxysilane, γ-glycidyl ether aminopropyltrimethoxysilane, γ-methacryloxy-propyltrimethoxysilane or Several, preferably gamma-aminopropyltriethoxysilane.

The auxiliary agent is selected from emulsified silicone oil, high carbon alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene alcohol amine ether, polyoxypropylene glycerin ether, polyoxypropylene polyoxyethylene glycerin ether, One or more than two kinds of polydimethylsiloxane; preferably polydimethylsiloxane.

In the present application, the black weather-resistant layer 9 is any film layer with grid shape.

In the present application, the reflectivity of the black weather-resistant layer 9 for visible light is lower than 10%, preferably lower than 5%. For example, the reflectivity of the black weather-resistant layer 9 for visible light can be 10%, 8%, or 5%. , 4%, 3%, 2%, 1%, etc.

Specifically, the black weather-resistant layer 9 has a reflectivity higher than 30% for infrared light with a wavelength above 750nm. For example, the black weather-resistant layer 9 may have a reflectivity of 30%, 40%, 50%, 60%, 70%, 80% etc. for infrared light with a wavelength above 750 nm.

Since the black weather-resistant layer 9 can reflect infrared light, when it is applied to a photovoltaic module, it can further reduce the absorption of infrared light by the photovoltaic module, thereby reducing the operating temperature of the photovoltaic module. The infrared light with a wavelength of 800-1100 reflected by the black weather-resistant layer 9 can be absorbed by the battery sheet 4 in the photovoltaic module. Since the battery sheet 4 is a solar battery sheet, the solar battery sheet can be improved. Layer energy conversion efficiency.

Existing photovoltaic modules mainly use EVA or POE as packaging materials. This packaging structure can meet the reliability requirements of photovoltaics, but due to the low elastic modulus and tensile strength of EVA and POE, it cannot meet the needs of construction applications such as curtain walls. , daylighting roof, etc. for the anti-deflection deformation of photovoltaic laminated glass, and the requirements for safety performance. Among them, safety performance is the key performance requirement for laminated glass in buildings. Laminated glass is usually encapsulated with PVB in buildings, so the encapsulation materials of general curtain wall photovoltaic modules are also required to be encapsulated with PVB. However, since the actual work of the photovoltaic module is due to the current inside, and most of the sunlight entering the photovoltaic module cannot be converted into electrical energy, but converted into thermal energy, so a large amount of heat will be generated, and the heat dissipation speed will not be very fast, so the module The temperature during actual work will be much higher than the ambient temperature. At an ambient temperature of 25°C, the temperature inside the module may reach above 50°C. When the ambient temperature rises and the amount of sunlight is large, the maximum temperature can reach above 80°C. . However, EVA, POE and PVB are elastic-plastic polymer materials. When the temperature is higher than 25°C, their elastic modulus decreases significantly with the increase of temperature. When the temperature is higher than 50°C, the elastic modulus of EVA, POE and PVB Both drop below 2MPa, the elastic modulus is much lower than the elastic modulus of glass 70GPa. In this normalized high-temperature environment, the flexural modulus of photovoltaic laminated glass also drops significantly, and the safety properties of safety glass also lose meaning due to the large drop in the modulus and strength of the adhesive film at high temperatures. (In this application, photovoltaic modules are also referred to as photovoltaic devices.)

Based on this, the present application provides a photovoltaic module, which includes a back plate, a first lower flexible adhesive film layer 7, a reinforced adhesive film layer 6, a second lower flexible adhesive film layer 5, a cell sheet layer 4 and Ger.

Specifically, the backplane is one of a glass backplane, a metal backplane, an organic backplane, an inorganic backplane or a composite material backplane.

Specifically, the front plate is an upper colored glass layer or an upper transparent layer.

When the front plate is the upper transparent layer, the photovoltaic assembly is a conventional colorless or black photovoltaic assembly, and can also be a photovoltaic device. That is, the transparent photovoltaic module includes a back sheet, a first lower flexible adhesive film layer 7 , a reinforced adhesive film layer 6 , a second lower flexible adhesive film layer 5 , a cell sheet layer 4 and an upper transparent layer stacked in sequence.

When the front plate is an upper layer of colored glass, the photovoltaic assembly is a colored photovoltaic assembly, which may also be called a colored photovoltaic device. That is to say, the colored photovoltaic module includes a backplane, a first lower flexible adhesive film layer 7 , a reinforced adhesive film layer 6 , a second lower flexible adhesive film layer 5 , a cell sheet layer 4 and an upper colored glass layer stacked in sequence.

On the side surface of the backboard away from the first lower flexible adhesive film layer, between the backboard and the first lower flexible adhesive film layer, between the first lower flexible adhesive film layer and A black weather-resistant seal is provided at any position between the reinforced adhesive film layers, between the reinforced adhesive film layer and the second lower flexible adhesive film layer, and between the second lower flexible adhesive film layer and the battery sheet. layer. (The black weather-resistant layer can refer to the description of the aforementioned black weather-resistant layer)

The first lower flexible adhesive film layer 7, the reinforced adhesive film layer 6, the second lower flexible adhesive film layer 5, and the cell sheet layer 4 can refer to the first lower flexible adhesive film layer 7, The description of the reinforced adhesive film layer 6 , the second lower flexible adhesive film layer 5 and the battery sheet layer 4 is given.

The present application provides a color photovoltaic module, including a rear glass layer 8, an adhesive film layer, a battery sheet layer 4 and an upper layer of colored glass layer stacked in sequence;

On the side surface of the back glass layer 8 away from the adhesive film layer, between the back glass layer 8 and the adhesive film layer, at any position between the adhesive film layer and the battery sheet, or in the adhesive film layer A black weather-resistant layer 9 is provided;

The reflectivity of the black weather-resistant layer 9 for visible light is lower than 10%, and the reflectivity for infrared light with a wavelength above 750nm is higher than 30%.

Specifically, the color photovoltaic module includes a black weather-resistant layer 9, a back glass Layer 8, adhesive film layer, cell sheet layer 4 and upper colored glass layer.

Specifically, the colored photovoltaic module includes a rear glass layer 8 , a black weather-resistant layer 9 , an adhesive film layer, a battery sheet layer 4 and an upper layer of colored glass layer that are stacked in sequence.

Specifically, the colored photovoltaic module includes a rear glass layer 8, an adhesive film layer, a black weather-resistant layer 9, a battery sheet layer 4, and an upper layer of colored glass layer that are sequentially stacked.

Specifically, the colored photovoltaic module includes a rear glass layer 8 , an adhesive film layer, a battery sheet layer 4 and an upper colored glass layer stacked in sequence, and a black weather-resistant layer 9 is disposed inside the adhesive film layer.

In the present application, the adhesive film layer is composed of an adhesive film, and the adhesive film is selected from a single-layer adhesive film, a double-layer adhesive film or a triple-layer adhesive film and any one of the above.

Specifically, the adhesive film is a flexible adhesive film or a reinforced adhesive film or a laminated adhesive film of the flexible adhesive film and the reinforced adhesive film.

Specifically, the adhesive film layer is a first lower flexible adhesive film layer 7 , a reinforced adhesive film layer 6 and a second lower flexible adhesive film layer 5 which are stacked in sequence.

Specifically, the adhesive film layer is a first lower flexible adhesive film layer 7 , a reinforced adhesive film layer 6 , a black weather-resistant layer 9 and a second lower flexible adhesive film layer 5 which are sequentially stacked.

Specifically, the adhesive film layer is a first lower flexible adhesive film layer 7 , a black weather-resistant layer 9 , a reinforced adhesive film layer 6 and a second lower flexible adhesive film layer 5 which are sequentially stacked.

In a specific embodiment, the color photovoltaic module includes a black weather-resistant layer 9, a back glass layer 8, a first lower flexible adhesive film layer 7, a reinforced adhesive film layer 6, and a second lower flexible adhesive film layer that are sequentially stacked. 5. The battery sheet layer 4 and the upper colored glass layer.

In a specific embodiment, the color photovoltaic module includes a rear glass layer 8, a black weather-resistant layer 9, a first lower flexible adhesive film layer 7, a reinforced adhesive film layer 6, and a second lower flexible adhesive film layer that are stacked in sequence. 5. The battery sheet layer 4 and the upper colored glass layer.

In a specific embodiment, the color photovoltaic module includes a rear glass layer 8, a first lower flexible adhesive film layer 7, a reinforced adhesive film layer 6, a second lower flexible adhesive film layer 5, and a black weather-resistant layer that are sequentially stacked. 9. The battery sheet layer 4 and the upper colored glass layer.

In a specific embodiment, as shown in FIG. 1, the color photovoltaic module includes a rear glass layer 8, a first lower flexible adhesive film layer 7, a strengthening adhesive film layer 6, a second The lower flexible adhesive film layer 5, the cell sheet layer 4 and the upper colored glass layer. A black weather-resistant layer 9 is coated on the surface of the reinforced adhesive film layer 6 close to the second lower flexible adhesive film layer 5 .

The back glass layer 8 is transparent glass, and its thickness can be 1-18mm. For example, it can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, or 18mm.

In the present application, the first lower flexible adhesive film layer 7 and the second lower flexible adhesive film layer 5 are all selected from one of EVA film layer, POE film layer, PVB film layer or SGP film layer;

Specifically, the first lower flexible adhesive film layer 7 and the second lower flexible adhesive film layer 5 may be the same film layer or different film layers.

In a specific embodiment, the first lower flexible adhesive film layer 7 is an EVA film layer, and the second lower flexible adhesive film layer 5 is an EVA film layer.

In a specific embodiment, the first lower flexible adhesive film layer 7 is an EVA film layer, and the second lower flexible adhesive film layer 5 is a POE film layer.

In a specific embodiment, the first lower flexible adhesive film layer 7 is an EVA film layer, and the second lower flexible adhesive film layer 5 is an SGP film layer.

In a specific embodiment, the first lower flexible adhesive film layer 7 is a POE film layer, and the second lower flexible adhesive film layer 5 is an EVA film layer.

In a specific embodiment, the first lower flexible adhesive film layer 7 is a POE film layer, and the second lower flexible adhesive film layer 5 is a POE film layer.

In a specific embodiment, the first lower flexible adhesive film layer 7 is a POE film layer, and the second lower flexible adhesive film layer 5 is an SGP film layer.

In a specific embodiment, the first lower flexible adhesive film layer 7 is a PVB film layer, and the second lower flexible adhesive film layer 5 is a PVB film layer.

In a specific embodiment, the first lower flexible adhesive film layer 7 is an SGP film layer, and the second lower flexible adhesive film layer 5 is an SGP film layer.

In the present application, the thicknesses of the first lower flexible adhesive film layer 7 and the second lower flexible adhesive film layer 5 are both 0.1-2mm; for example, they can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm or 2mm.

In the present application, the reinforced adhesive film layer 6 is one of PET film layer, PU film layer, nylon layer or wire mesh layer; the thickness of the reinforced adhesive film layer 6 is 0.1-1mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm.

The black weather-resistant layer 9 can absorb visible light, so as to avoid the different reflection of incident light between the cell area and the cell gap area, resulting in uneven color development of the photovoltaic module and color difference or failure to develop color, thereby affecting the overall aesthetics. Black weather resistance The addition of the layer absorbs visible light, thereby ensuring the overall color rendering and aesthetics of the photovoltaic module. At the same time, because the black weather-resistant layer 9 has a high reflectivity for infrared light, the infrared light reflected by the black weather-resistant layer 9 can be The battery sheet layer 4 is absorbed, so the color photovoltaic module described in this application can further improve the power generation efficiency of the photovoltaic module when realizing the color.

Specifically, the reinforced adhesive film layer 6 coated with the black weather-resistant layer 9 has a reflectivity of less than 10% for visible light, preferably less than 5%. For example, the reflectivity of the black weather-resistant layer 9 for visible light can be 10%. %, 8%, 5%, 4%, 3%, 2%, 1%, etc.

Specifically, the reflectance of the reinforced adhesive film layer 6 coated with the black weather-resistant layer 9 is higher than 30% for infrared light with a wavelength above 750nm. For example, the reinforced adhesive film layer 6 coated with the black weather-resistant layer 9 may have a reflectivity of 30%, 40%, 50%, 60%, 70%, 80% etc. for infrared light with a wavelength above 750nm.

Since the black weather-resistant layer 9 can reflect infrared light, it can further reduce the absorption of infrared light by the device, thereby reducing the operating temperature of the device, and the wavelength reflected by the black weather-resistant layer 9 is 800-1100 The infrared light can be absorbed by the battery sheet 4, since the battery sheet 4 is a solar battery sheet 4, the energy conversion efficiency of the solar battery sheet 4 can be improved.

In the present application, the raw materials of the black weather-resistant layer 9 include: 80-100 parts of weather-resistant resin substrate, 40-120 parts of solvent, 10-50 parts of black pigment, 5-20 parts of filler, silane The joint agent is 1-20 parts, the curing agent is 3-30 parts, and the auxiliary agent is 1-5 parts.

Specifically, the black weather-resistant layer 9 can be coated on the entire surface of the back glass layer 8 close to the first lower flexible adhesive film layer 7 or on either side of the first lower flexible adhesive film layer 7 Surface/surface on either side of the reinforced adhesive film layer 6/surface on either side of the second lower flexible adhesive film layer 5/surface of the side of the battery sheet layer 4 close to the second lower flexible adhesive film layer 5, also It can be printed on the side surface of the back glass layer 8 close to the first lower flexible adhesive film layer 7/the surface on either side of the first lower flexible adhesive film layer 7/reinforced adhesive film layer by screen printing 6 the surface on either side/the surface on either side of the second lower flexible adhesive film layer 5/the surface of the battery sheet layer 4 on the side close to the second lower flexible adhesive film layer 5, in the form of a grid, as shown in picture 2. Using a grid structure will reduce the amount of black paint used, and allow the second lower flexible adhesive film layer 5 on the back of the battery sheet 4 to have light transmission. When the double-sided battery sheet 4 is used, the back can generate electricity. At the same time, the infrared rays that pass through the battery sheet 4 can pass through the second lower flexible adhesive film layer 5 on the back of the battery sheet 4, reducing the absorption of infrared rays by the device and reducing the operating temperature of the device.

In the present application, the number of the battery sheets 4 is multiple, and the plurality of the battery sheets 4 are arranged in an array at equal intervals. The battery sheet 4 can be an ordinary single crystal or polycrystalline battery sheet 4, and the number of grid lines of the battery sheet 4 can be any number between 2 and 30. It can also be a back contact battery sheet 4, a battery sheet 4 with a shingled structure or a metal perforated structure battery sheet 4 and a corresponding connection structure.

When the black weather-resistant layer 9 is grid-shaped, the black weather-resistant layer 9 is located in the gap between adjacent battery sheets 4 on the orthographic projection of the reinforced adhesive film layer 6 and on the edge of the reinforced adhesive film layer 6 .

In the present application, the upper stained glass layer consists of two structures, specifically as follows:

The first structure is: the upper stained glass layer includes an upper adhesive film layer 3, a colored glaze layer 2 and a front glass layer 1 arranged in sequence, and the upper adhesive film layer 3 is away from the side of the colored glaze layer 2 The surface is connected with the battery sheet layer 4 .

Specifically, the upper adhesive film layer 3 is a colorless transparent adhesive film layer, and the colorless transparent adhesive film layer may be an EVA layer, a POE layer, a PVB layer or an SGP layer, including but not limited thereto. Its thickness is 0.1-2mm, such as 0.1mm, 0.5mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm or 2mm.

Described colored glaze layer 2 can be red glaze layer, orange glaze layer, yellow glaze layer, green glaze layer, blue glaze layer Glaze layers of various colors such as glaze layer and purple glaze layer.

Specifically, the colored glaze layer 2 may be a high-temperature ink with glass powder base material plus colored inorganic toner, or a low-temperature ink with organic solvent plus inorganic toner.

The high-temperature ink is made by mixing glass powder, inorganic toner, and organic solvent, and then attaching it to the front glass layer 1 by screen printing or spraying, and then sintering at a temperature range of 500 to 800°C. At the same time, the front glass layer 1 is tempered, so that the colored glaze layer 2 is arranged on the front glass layer 1 .

The inorganic toner can be a multilayer oxide composed of metal oxides such as titanium, aluminum, silicon, tin, zirconium, zinc, etc., or a multilayer structure formed by adding natural mica or synthetic mica to _TiO2 . Different colors can be produced, and it can also be a multi-layer oxide with micro-nano structure characteristics; the glass powder base material is silicon oxide, bismuth oxide, boron oxide, zinc oxide, potassium carbonate, titanium oxide, zirconium oxide, aluminum oxide, Calcium oxide, strontium oxide, glass reinforcing agent, glass clarifying agent, decolorizing agent and other mixtures are smelted and then pulverized.

The low-temperature ink is mixed with an organic solvent and an inorganic toner, and the obtained low-temperature ink is attached to the front glass layer 1 by screen printing or spraying, and then cured by heating at 100°C to 300°C. Or use ultraviolet light to cure, so that the colored glaze layer 2 is arranged on the front glass layer 1 . The proportion of inorganic toner added in low temperature ink is 0.5% to 15%.

The organic solvent can be hexanediol acrylate, functional acrylic ester, coupling agent, photocatalyst and other resins, and the organic solvent is stirred evenly after adding the inorganic toner.

The front glass layer 1 is transparent glass with a thickness of 1-16mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm or 16mm.

The second structure is: the upper stained glass layer includes an upper adhesive film layer 3 and a front glass layer 1 arranged in sequence from bottom to top, and the upper layer adhesive film layer 3 is away from the side surface of the front glass layer 1 It is connected with the battery sheet layer 4 together.

Specifically, the upper adhesive film layer 3 is a colored transparent adhesive film layer with a thickness of 0.1-2mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm , 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm or 2mm.

The colored transparent adhesive film layer can be formed by adding inorganic toner in the transparent adhesive film, and the transparent adhesive film The transparent film can be EVA, POE, PVB or SGP, and the inorganic toner can be multilayer oxide or pearl powder with interference characteristics, or ferric oxide and cobalt phosphate with absorption characteristics. , copper carbonate, chromium oxide and other inorganic toners.

In the present application, the upper layer of colored glass layer is an interference type colored glass layer. Due to its high transmittance and low reflectivity, when there is a material with high visible light reflectivity below the upper layer of colored glass layer, the upper layer of colored glass layer The visible light waves reflected by the layer itself are mixed with the visible light waves reflected under the upper stained glass layer, and the color seen by the human eye will be different from the color that should be presented by the reflection of the upper stained glass layer itself. Therefore, it is necessary to have a completely black or near-black material under the upper stained glass layer to absorb the visible light transmitted by the glass. At this time, the light received by the human eye above the upper stained glass layer will mainly be inorganic The reflected light produced by the interference of the toner powder will allow the true color of the upper stained glass layer to be seen.

In the present application, the upper colored glass layer has an anti-glare structure.

Specifically, the surface of the upper colored glass layer away from the colored glaze layer 2 is coated with an anti-reflection layer to increase light transmittance.

In the present application, the upper transparent layer includes an upper adhesive film layer 3 and a front glass layer 1 arranged in sequence from bottom to top, and the surface of the upper adhesive film layer 3 facing away from the front glass layer 1 is in contact with the front glass layer 1. The battery sheets 4 are connected together.

Specifically, the upper adhesive film layer 3 is a transparent adhesive film layer with a thickness of 0.1-2mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm or 2mm.

The transparent adhesive film layer can be EVA, POE, PVB or SGP, etc., including but not limited thereto.

Further, the upper transparent layer has an anti-glare structure.

The application provides a method for preparing a colored photovoltaic module, comprising the following steps:

Step 1: providing a rear glass layer 8,

Step 2: providing a three-layer composite film, the three-layer composite film includes a first lower flexible adhesive film layer 7, a reinforced adhesive film layer 6, and a second lower flexible adhesive film layer 5 that are stacked together in sequence;

Step 3: stacking the first lower flexible film layer 7 and the back glass layer 8 together;

Step 4: Installing the battery sheet 4 on the surface of the second lower flexible adhesive film layer 5 facing away from the reinforced adhesive film layer 6;

Step five: setting the upper material glass layer on the surface of the cell sheet 4 facing away from the second lower flexible adhesive film layer 5 .

In step 2, after corona treatment is performed on the two surfaces of the reinforced adhesive film layer 6, they are respectively pressed together with the first lower flexible adhesive film layer 7 and the second lower flexible adhesive film layer 5, thereby Layered together to form a three-layer composite film.

The three-layer composite film exists in the color photovoltaic module. When the reinforced adhesive film layer 6 is a PET film layer, the surface activity of the PET film and the surface coating of the PET film is generally low, and the resistance to the flexible adhesive film is relatively low. The adhesiveness is low. In order to enhance the adhesiveness, the surface of the PET film is usually treated with plasma corona when it leaves the factory, so as to form abundant dangling bonds on the surface of the PET film, so that the PET film can form a chemical bond with the flexible film to form a firm bond. Therefore, the PET film after corona can be directly laminated with the flexible adhesive film in a laminator to form a three-layer composite film. As a thermosetting material, PET has an elastic modulus of about 1 to 2 GPa at room temperature, and its breaking strength can reach more than 120 MPa, which is higher than that of tempered glass. Even when the temperature rises to 75°C, the modulus of elasticity still exceeds 1GPa, and the strength does not lose much. In this way, the device works normally when the ambient temperature is high, and when the component temperature reaches 60 to 80°C, the presence of the PET film layer makes the three-layer composite film still have high modulus and high strength. In this way, even at a high temperature of 80°C, when the device is subjected to abnormal external force and the back glass layer 8 or the front glass layer is broken, the PET film layer with high strength and toughness can adhere to the first lower flexible film layer 7 and the second lower flexible film layer. The flexible adhesive film of adhesive film layer 5 can adhere to broken glass shards, prevent it from falling in pieces, and injure pedestrians below high-rise buildings. And if there is no high-temperature rigid material such as PET adhesive film, when the device breaks, the self-weight of the glass fragments will all be loaded on the first lower flexible adhesive film layer 7, the second lower flexible adhesive film layer 5 and the lower high-temperature strength. On a flexible film such as the upper flexible film layer, the film will be stretched and deformed until it cracks, causing large pieces of glass to break away from the component and fall, which will pose a safety hazard. Therefore, the high-strength PET adhesive layer at high temperature can allow the component to maintain high resistance to flexural deformation and high impact resistance, that is, it has high safety performance. And this PET film has high strength High-strength materials can also be replaced by PU, nylon or wire mesh materials. These materials have higher strength, can have stronger drop resistance when the components are broken, and have higher safety performance.

Example

The experimental methods used in the following examples are conventional methods unless otherwise specified.

The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

Example 1

The preparation method of the colored photovoltaic module of this embodiment comprises the following steps:

Step 1: Provide the back glass layer,

The back glass layer is transparent glass, and its thickness may be 3.2 mm.

Step 2: providing a three-layer composite film, the three-layer composite film includes a first lower flexible adhesive film layer, a reinforced adhesive film layer and a second lower flexible adhesive film layer stacked together in sequence;

Before the compounding of the reinforced adhesive film layer, a black weather-resistant layer is first printed on one side of the surface, and then the two surfaces of the reinforced adhesive film layer are subjected to corona treatment, respectively, with the flexible adhesive film of the first lower layer. The first layer and the second lower layer of flexible adhesive film are laminated together to form a three-layer composite film.

The first lower flexible adhesive film layer is an EVA film layer with a thickness of 0.5 mm.

The reinforced adhesive film layer is a PET film layer with a thickness of 0.2 mm.

The second lower flexible adhesive film layer is a POE film layer with a thickness of 0.5 mm.

The black weather-resistant layer is grid-like, and the formula of the black weather-resistant layer is acrylic resin, butyl acetate, iron chrome black, white carbon black, γ-aminopropyl triethoxysilane, isocyanate curing agent and poly The mass ratio of dimethylsiloxane is 80:40:10:5:10:10:1, and the black weather-resistant layer is formed by mixing the above-mentioned compounds with heating and curing.

Step 3: laminating the first lower flexible film layer and the back glass;

Step 4: Install a battery sheet on the surface of the second lower flexible adhesive film layer away from the reinforced adhesive film layer; the battery sheet is a crystalline silicon battery sheet.

Step 5: setting an upper flexible adhesive film layer on the surface of the cell sheet away from the second lower flexible adhesive film layer;

A front glass layer is provided, and a blue glaze layer is formed on one side surface of the front glass layer, and the The side surface of the front glass with the blue glaze layer is laminated with the upper layer of flexible adhesive film.

The upper flexible adhesive film layer is an EVA film layer with a thickness of 0.5mm.

The front glass layer is transparent glass with a thickness of 3.2 mm.

The color photovoltaic module is tested as follows:

Strength test: In terms of strength, the test is carried out according to the falling ball test standard, and steel balls of different weights are used to impact the colored photovoltaic modules from different heights. In the case that the back glass layer and the front glass layer are damaged, the glass shards in the colored photovoltaic module of this embodiment can adhere to the reinforced adhesive film layer without scattering, and the safety is relatively high.

Deflection deformation test: After the impact of the steel ball, the back glass layer and the front glass layer of the damaged device were placed sideways in a high-temperature box at 80°C for 1 hour (simulating the high-temperature state of the component during actual operation), and the device of this embodiment was taken out. The device remains as it is.

Color test: Use a spectrophotometer to test the color of the finished components. After testing, the Musell indices L, C, and H that characterize the color characteristics are 32, 23, and -86, respectively. Among them, L is lightness, C is saturation, H is hue, saturation 23 is already a relatively high saturation, and the color characteristics are very obvious. Glass of this color has higher light transmittance and lower reflectivity.

The properties of the colored photovoltaic modules are shown in Table 1 and Table 2. Its color characteristics are shown in Figure 3, and it can be seen from Table 2 and Figure 3 that the color photovoltaic module of Example 1 has high color saturation while still maintaining high device efficiency and high safety features.

Example 2

The difference between embodiment 2 and embodiment 1 is that the black weather-resistant layer in embodiment 2 covers the entire surface of the reinforced adhesive film layer. The properties of the colored photovoltaic modules are shown in Table 1 and Table 2.

Example 3

The difference between embodiment 3 and embodiment 1 is that there is no black weather-resistant layer. The properties of the colored photovoltaic modules are shown in Table 1 and Table 2.

Example 4

The difference between embodiment 4 and embodiment 1 is that the reinforced adhesive film layer is a PU film layer. The properties of the colored photovoltaic modules are shown in Table 1 and Table 2.

Example 5

The difference between embodiment 5 and embodiment 1 is that the reinforced adhesive film layer is a nylon layer. The properties of the colored photovoltaic modules are shown in Table 1 and Table 2.

Example 6

The difference between embodiment 6 and embodiment 1 lies in that the reinforced adhesive film layer is a wire mesh layer. The properties of the colored photovoltaic modules are shown in Table 1 and Table 2.

Example 7

The difference between embodiment 7 and embodiment 1 is that the formula of the black weather-resistant layer is different, and the formula of the black weather-resistant layer in embodiment 7 is: acrylic resin, butyl acetate, iron chrome black, white carbon black, The mass ratio of triethoxysilane, isocyanate-based curing agent, and polydimethylsiloxane is 90:60:15:5:10:10:1, and the performance of the color photovoltaic modules is shown in Table 1 and Table 2 .

Example 8

The difference between embodiment 8 and embodiment 1 is that the formulation of the black weather-resistant layer is different. The formulation of the black weather-resistant layer in embodiment 8 is: polyvinylidene fluoride, butyl acetate, iron chrome black, white carbon black, The mass ratio of aminopropyltriethoxysilane, isocyanate-based curing agent and polydimethylsiloxane is 80:60:20:5:10:10:1, and the performance of the color photovoltaic module is shown in Table 1 and Table 2.

Example 9

The difference between embodiment 9 and embodiment 1 is that the formulation of the black weather-resistant layer is different. The mass ratio of aminopropyltriethoxysilane, isocyanate-based curing agent and polydimethylsiloxane is 100:70:25:5:10:10:2, and the performance of the color photovoltaic module is shown in Table 1 and Table 2.

Example 10

The difference between embodiment 10 and embodiment 1 is that the black weather-resistant layer formula is different, and the formula of the black weather-resistant layer in embodiment 10 is: perfluoroethyl ether, butyl acetate, iron chrome black, white carbon black, γ- The mass ratio of aminopropyltriethoxysilane, isocyanate-based curing agent and polydimethylsiloxane is 100:70:30:5:10:10:2, and the performance of the color photovoltaic module is shown in Table 1 and Table 2.

Example 11

The difference between Example 11 and Example 1 is that the formulation of the black weather-resistant layer is different. The formulation of the black weather-resistant layer in Example 11 is: acrylic resin, butyl acetate, carbon black, white carbon black, γ-aminopropyl The mass ratio of triethoxysilane, isocyanate curing agent and polydimethylsiloxane is 80:60:20:5:10:10:1, and the properties of the color photovoltaic modules are shown in Table 1 and Table 2.

Example 12

As shown in Figure 6, the difference between Embodiment 12 and Embodiment 1 is that the position of the black weather-resistant layer is different. In this embodiment, the black weather-resistant layer is arranged between the back glass layer and the first lower flexible film layer. between.

The performance of the photovoltaic module is shown in Table 1.

Example 13

As shown in Figure 5, the difference between Embodiment 13 and Embodiment 1 is that the position of the black weather-resistant layer is different. In this embodiment, the black weather-resistant layer is arranged on the first lower flexible adhesive film layer and the reinforced adhesive film layer. between.

The performance of the photovoltaic module is shown in Table 1.

Example 14

As shown in Figure 4, the difference between Example 14 and Example 1 is that the position of the black weather-resistant layer is different. In this embodiment, the black weather-resistant layer is arranged between the second lower flexible film layer and the battery sheet. .

The performance of the photovoltaic module is shown in Table 1.

Example 15

The difference between embodiment 15 and embodiment 1 lies in the position of the black weather-resistant layer. In this embodiment, the black weather-resistant layer is arranged on the side surface of the back glass layer away from the first lower flexible adhesive film layer.

The performance of the photovoltaic module is shown in Table 1.

Comparative example 1

The difference between Comparative Example 1 and Example 1 is that there is no reinforced adhesive film layer, and the performance of the color photovoltaic module is shown in Table 1 and Table 2.

Table 1 is the formula and reflectance of the black weather-resistant layer of each embodiment and comparative examples

Table 2 Flexural deformation resistance and high impact resistance

Summary: From Table 1 and Table 2, it can be seen that the color photovoltaic module described in this application uses colored ink to print glass to realize the color of the front glass, and the use of pearl powder or multi-layer oxide nano-toner ensures that the glass can achieve color at the same time. , maintaining high light transmittance, thereby ensuring high efficiency of photovoltaic modules. This ensures that the photovoltaic module meets the appearance requirements when used in the construction field, and at the same time maintains the core power generation properties of the photovoltaic module to the highest extent. On the packaging material, a unique flexible film plus rigid film plus flexible film is used. The use of the rigid material layer ensures high strength of the photovoltaic module, especially the post-failure strength, that is, after the module is damaged, it will not be damaged by the glue. Insufficient film strength, especially after the strength of the flexible film decreases under high temperature conditions, it will fall. It guarantees the safety core attributes of photovoltaic modules used on building curtain walls. The black weather-resistant layer of the rigid film layer is a necessary component for the color development of pearl powder and multi-layer oxide nano-toner. The ordinary black weather-resistant layer has low reflectivity and strong absorption in the visible and near-infrared light bands. After using the different formulas shown in Table 1 for verification, it was found that the reflectance of near-infrared light above 750nm was improved to varying degrees by changing the material. The light reflected by the material on the back of the photovoltaic module can pass through the gap and be reflected by the glass interface to the surface of the battery sheet for a second time, so that it can be absorbed by the battery sheet to generate power gain. The coating structure with high infrared reflection will generate power gain, further improve the efficiency of photovoltaic modules, and bring additional benefits.

Although the embodiments of the present application have been described above, the present application is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative, instructive, and not restrictive. Those skilled in the art can also make many forms under the enlightenment of this description and without departing from the protection scope of the claims of the application, and these all belong to the protection list of the application.

Claims

A black weather-resistant layer is characterized in that it comprises the following components:

80-100 parts of weather-resistant resin substrate, 40-120 parts of solvent, 10-50 parts of black pigment, 5-20 parts of filler, 1-20 parts of silane coupling agent, 3-30 parts of curing agent , the auxiliary agent is 1-5 parts.
The black weather-resistant layer according to claim 1, wherein the weather-resistant resin substrate is selected from the group consisting of acrylic resin, polyester resin, fluorocarbon resin, epoxy resin, vinylidene fluoride, trifluoroethylene-vinyl ether copolymer At least one of compound, trifluoroethylene-vinyl ester copolymer, tetrafluoroethylene-vinyl ether copolymer and isocyanate, preferably acrylic resin or fluorocarbon resin;

The solvent is selected from at least one of toluene, xylene, ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, methyl ethyl ketone, methyl isobutyl ketone and N-methylpyrrolidone, preferably Butyl acetate;

The black pigment is selected from at least one of iron chrome black, iron chrome black, copper chrome black, iron manganese black, aniline black, and perylene black, preferably iron chrome black;

The filler is at least one selected from glass powder, ceramic powder, white carbon black and alumina, preferably white carbon black;

The curing agent is at least one of an isocyanate curing agent, an imidazole curing agent, an amine curing agent and a dicyandiamide curing agent, preferably an isocyanate curing agent;

The silane coupling agent is selected from at least One, preferably gamma-aminopropyltriethoxysilane;

The auxiliary agent is selected from emulsified silicone oil, high carbon alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene alcohol amine ether, polyoxypropylene glycerin ether, polyoxypropylene polyoxyethylene glycerin One of ether or polydimethylsiloxane; preferably polydimethylsiloxane.
The black weather-resistant layer according to claim 1, characterized in that, the particle size of the black pigment is 5-50 μm; the particle size of the filler is 1-5 μm.
The black weather-resistant layer according to claim 1, characterized in that, the black weather-resistant layer is a grid-shaped film layer.
The black weather-resistant layer according to claim 1, characterized in that, the reflectance of the black weather-resistant layer for visible light is lower than 10%, and the reflectance for infrared light with a wavelength of 750 nm or more is higher than 30%.
A photovoltaic module is characterized in that it comprises a back plate, a first lower flexible adhesive film layer, a reinforced adhesive film layer, a second lower flexible adhesive film layer, a cell sheet layer and a front plate which are sequentially stacked.
The photovoltaic module according to claim 6, wherein the first lower flexible adhesive film layer and the second lower flexible adhesive film layer are all selected from EVA film, POE film, PVB film or SGP film one of

The thickness of the first lower flexible film layer is 0.1-2mm;

The thickness of the second lower flexible film layer is 0.1-2mm.
The photovoltaic module according to claim 6, wherein the reinforced adhesive film layer is one of a PET film layer, a PU film layer, a nylon layer or a wire mesh layer;

The thickness of the reinforced film layer is 0.1-1mm.
The photovoltaic module according to any one of claims 6-8, characterized in that, on the side surface of the back plate away from the first lower flexible adhesive film layer, the back plate and the first lower layer Between layers of flexible adhesive film layers, between the first lower flexible adhesive film layer and the reinforced adhesive film layer, between the reinforced adhesive film layer and the second lower flexible adhesive film layer, between the first lower flexible adhesive film layer A black weather-resistant layer is arranged at any position between the second lower flexible film layer and the battery sheet.
The photovoltaic module according to claim 9, wherein the backplane is one of a glass backplane, a metal backplane, an organic backplane, an inorganic backplane or a composite material backplane.
The photovoltaic module according to claim 10, wherein the front plate is an upper colored glass layer or an upper transparent layer.
The photovoltaic module according to claim 11, wherein the photovoltaic module comprises a rear glass layer, a first lower flexible adhesive film layer, a reinforced adhesive film layer, a second lower flexible adhesive film layer, a battery lamina and upper layer of stained glass.
The photovoltaic module according to any one of claims 9-12, wherein the black weather-resistant layer is the black weather-resistant layer described in any one of claims 1-5.
A colored photovoltaic module, characterized in that it includes a rear glass layer, an adhesive film layer, a battery sheet layer and an upper layer of colored glass layer that are sequentially stacked;

On the side surface of the back glass layer away from the adhesive film layer, between the back glass layer and the adhesive film layer, at any position between the adhesive film layer and the battery sheet, or in the adhesive film layer black weathering layer;

The reflectance of the black weather-resistant layer for visible light is lower than 10%, and the reflectance for infrared light with a wavelength above 750nm is higher than 30%.
The color photovoltaic module according to claim 14, wherein the adhesive film layer is composed of an adhesive film, and the adhesive film is selected from any one of a single-layer adhesive film, a double-layer adhesive film, or a three-layer adhesive film and the above kind.
The color photovoltaic module according to claim 15, wherein the adhesive film is a flexible adhesive film or a reinforced adhesive film or a laminated adhesive film of a flexible adhesive film and a reinforced adhesive film;

The reinforced adhesive film layer is one of PET film layer, PU film layer, nylon layer or wire mesh layer;

The thickness of the reinforced film layer is 0.1-1mm.
The color photovoltaic module according to claim 14, wherein the adhesive film layer is a first lower flexible adhesive film layer, a reinforced adhesive film, and a second lower flexible adhesive film layer arranged sequentially.
The color photovoltaic module according to claim 14, wherein the adhesive film layer is a first lower flexible adhesive film layer, a reinforced adhesive film, a black weather-resistant layer, and a second lower flexible adhesive film layer that are stacked in sequence.
According to the photovoltaic module according to any one of claims 11-13 or the colored photovoltaic module according to any one of claims 14-18, it is characterized in that the upper layer of colored glass layer includes an upper layer of glue arranged in sequence from bottom to top film layer, colored glaze layer and front glass layer, and the side surface of the upper adhesive film layer away from the colored glaze layer is connected with the battery sheet layer.
The photovoltaic module or colored photovoltaic module according to claim 19, wherein the upper adhesive film layer is a colorless transparent adhesive film layer with a thickness of 0.1-2mm.
According to the photovoltaic module according to any one of claims 11-13 or the colored photovoltaic module according to any one of claims 14-18, it is characterized in that the upper layer of colored glass layer includes an upper layer of adhesive film layer and a front surface arranged in sequence a glass layer, and the side surface of the upper adhesive film layer away from the front glass layer is connected with the battery sheet layer.
The photovoltaic module or colored photovoltaic module according to claim 21, characterized in that, the upper adhesive film layer is a colored transparent adhesive film layer with a thickness of 0.1-2mm.
The photovoltaic module or color photovoltaic module according to any one of claims 19-22, wherein the front glass layer is transparent glass with a thickness of 1-16 mm.
The photovoltaic module or the color photovoltaic module according to any one of claims 19-22, wherein an anti-reflection layer is provided on one side of the front glass layer.
The color photovoltaic module according to any one of claims 14-24, wherein the black weather-resistant layer is the black weather-resistant layer described in any one of claims 1-5.
A method for preparing a colored photovoltaic device according to any one of claims 14-25, characterized in that it comprises the steps of:

Provide back glass layer,

A three-layer composite film is provided, the three-layer composite film includes a first lower flexible adhesive film layer, a reinforced adhesive film layer and a second lower flexible adhesive film layer stacked together in sequence;

Laminating the first lower flexible adhesive film layer and the back glass together;

A battery sheet layer is arranged on the surface of the second lower flexible adhesive film layer away from the reinforced adhesive film layer;

The upper material glass layer is arranged on the side surface of the battery sheet layer away from the second lower flexible adhesive film layer.
The method for preparing a colored photovoltaic device according to claim 26, characterized in that, after corona treatment is performed on the two surfaces of the reinforced adhesive film layer, they are respectively bonded with the first lower flexible adhesive film layer and the second flexible adhesive film layer. The lower flexible film layer is pressed together to form the three-layer composite film.