CN213425002U

CN213425002U - Metal backboard and photovoltaic component

Info

Publication number: CN213425002U
Application number: CN202022494752.1U
Authority: CN
Inventors: 谭小春; 黄腾
Original assignee: Xian Longi Green Energy Architecture Technology Co Ltd
Current assignee: Longi Solar Technology Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-06-11
Anticipated expiration: 2030-10-30

Abstract

The utility model discloses a metal backboard and photovoltaic component relates to photovoltaic device technical field to it is not good to solve bonding effect between current metal sheet and the insulating layer, has the problem of debonding the risk. The metal back plate includes: the metal plate, first inoxidizing coating, second inoxidizing coating and insulating layer. The metal plate is located between the first protective layer and the second protective layer, the insulating layer is formed on the surface, away from the metal plate, of the second protective layer, and the surface, facing the insulating layer, of the first protective layer is provided with a plurality of hole-shaped structures. The photovoltaic component comprises the metal back plate provided by the technical scheme.

Description

Metal backboard and photovoltaic component

Technical Field

The utility model relates to a photovoltaic device technical field especially relates to a metal backboard and photovoltaic component.

Background

Photovoltaic power generation technology has become increasingly popular, especially in conjunction with traditional buildings. The photovoltaic module can be applied to building roofs and building facades, so that the energy consumption of buildings is reduced. The component products used as building materials need to meet the performance requirements of the building materials, and the performance requirements comprise air tightness and water tightness requirements, fire resistance requirements, wind uncovering resistance and bearing capacity requirements.

For example, photovoltaic modules are combined with metal roofing to form photovoltaic members. The common bonding method in the market is to bond the assembly product on the metal roof by using structural adhesive. The surface condition of the metal roof has this great influence on the adhesion reliability. If the surface is polluted, the initial bonding strength is influenced on one hand, and the bonding reliability is greatly influenced on the other hand, so that the service life of a photovoltaic module product is directly influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a metal backboard and photovoltaic component for it is not good to solve bonding effect between current metal sheet and the insulating layer, has the problem of debonding risk.

In a first aspect, the present invention provides a metal back plate for use in a photovoltaic component, the metal back plate comprising a metal plate, a first protective layer, a second protective layer, and an insulating layer;

the metal plate is located between the first protective layer and the second protective layer, the insulating layer is formed on the surface, away from the metal plate, of the second protective layer, and the surface, facing the insulating layer, of the first protective layer is provided with a plurality of hole-shaped structures.

Adopt under the condition of above-mentioned technical scheme, the utility model provides a metal back plate through set up first inoxidizing coating and second inoxidizing coating on two surfaces at the metal sheet, the contact of isolated metal sheet and external corrosive substance for the metal sheet satisfies building material's performance requirement, improves the weatherability and the corrosion-resistant function of metal sheet. In addition, in the metal back plate provided by the utility model, the second protective layer is provided with the insulating layer, and the insulating layer can meet the electric insulation requirement combined with the photovoltaic cell; and first inoxidizing coating has a plurality of pore structures, and a plurality of pore structures can increase the area of contact of first inoxidizing coating and insulating layer to make the insulating layer can partly imbed above-mentioned a plurality of pore structures, form mechanical riveting effect, thereby improve the bonding effect of first inoxidizing coating and insulating layer, and then strengthen the bonding effect between insulating layer and the metal sheet. Through adopting the utility model provides a metal back plate can be so that photovoltaic module can be firm install on the building, improves the life of photovoltaic module on the building.

In one possible embodiment, the surface of the first protective layer facing the insulating layer has a porous fiber-like structure forming a plurality of pore-like structures.

Under the condition of adopting above-mentioned technical scheme, first inoxidizing coating has the porous fibrous structure who forms a plurality of pore structures towards the surface of insulating layer, and porous fibrous structure increases the area of contact of first inoxidizing coating and insulating layer to make the insulating layer can partly imbed above-mentioned a plurality of porous fibrous structures, form mechanical riveting effect, thereby improve the bonding effect of first inoxidizing coating and insulating layer, and then strengthen the bonding effect between insulating layer and the metal sheet.

In one possible implementation, the first protective layer is a dichromate passivation layer.

By adopting the technical scheme, the corrosion resistance of the metal or the metal coating can be improved after the metal is passivated by the dichromate. It also improves the adhesion of the metal to a paint layer or other organic coating.

In one possible implementation, the second protective layer is a fingerprint resistant layer. The second protective layer adopts the resistant fingerprint layer that resistant fingerprint liquid formed, and resistant fingerprint layer has hydrophobicity and oleophobic nature.

Under the condition of adopting above-mentioned technical scheme, utilize resistant fingerprint layer can avoid metal backboard to produce the finger seal of a government organization in the application, keep the outward appearance of product pleasing to the eye.

In one possible implementation, at least one surface of the insulating layer has an adhesion-promoting layer.

Under the condition of adopting above-mentioned technical scheme, the adhesion promotion layer can increase the bonding effect of insulating side and adhesive linkage or first inoxidizing coating or other structural layers.

In one possible implementation, the adhesion promotion layer includes at least one of polyester copolymer, polyurethane, acrylates, silane coupling agents.

In a possible implementation manner, the metal back plate further comprises a functional layer with a radiation refrigeration function, and the functional layer is formed on the surface of the insulating layer far away from the first protective layer.

Under the condition of adopting the technical scheme, the photovoltaic component with the functional layer can reduce the temperature of the photovoltaic module in the using process, so that the generation efficiency of the photovoltaic cell is ensured not to be reduced due to temperature rise. Meanwhile, the temperature of the photovoltaic module is reduced, so that the negative influence of high temperature on the photovoltaic module, such as thermal oxidation aging, can be reduced, and the service life of the photovoltaic module is prolonged.

In one possible implementation, the functional layer contains a molding material and a functional material, and the molding material is a transparent molding material or a semitransparent molding material.

In one possible implementation, the functional material includes one or both of barium sulfate, alumina, or polytetrafluoroethylene.

In one possible implementation, the molding material includes one of polyvinylidene fluoride or polyvinylidene fluoride-hexafluoropropylene copolymer.

In a second aspect, the embodiments of the present invention further provide a photovoltaic member. The photovoltaic member comprises the metal back sheet described in the first aspect or any possible implementation manner of the first aspect.

The beneficial effects of the photovoltaic member provided by the second aspect are the same as those of the metal backsheet described in the first aspect or any one of the possible implementation manners of the first aspect, and are not described herein again.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1-2 are schematic structural diagrams of a metal back plate according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another metal back plate according to an embodiment of the present invention.

Reference numerals:

1-a metal plate, 2-a first protective layer, 3-a second protective layer,

4-insulating layer, 5-adhesive layer and 6-functional layer.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

A photovoltaic module generally includes a front cover plate, a back cover plate (back plate for short), and a photovoltaic cell disposed between the front cover plate and the back plate. An encapsulant film is also typically disposed between the photovoltaic cell and the front cover or back sheet. In a conventional photovoltaic module, an insulating layer made of an insulating material, such as glass or organic glass, is often used as the back sheet.

With the popularization of photovoltaic power generation technology, photovoltaic modules are beginning to be integrated with buildings. For example, photovoltaic modules are provided on some building roofs or building facades to provide electrical energy to the building interior through photovoltaic power generation. When the photovoltaic module is applied to a metal roof of a building, a metal plate of the metal roof is often used as a part of a back plate of the photovoltaic module. After a photovoltaic module with a metal plate is formed, the photovoltaic module is installed on a building to form building and photovoltaic module integration (BIPV for short), and a photovoltaic component is formed. The metal plate constitutes the back sheet of the BIPV structure by being combined with an insulating layer on the back sheet of a conventional photovoltaic module, or the photovoltaic module is disposed on the metal plate having the insulating layer to form the photovoltaic structure. That is, the metal plate may be part of a back sheet of the photovoltaic module, and the metal plate may also form a photovoltaic member together with the photovoltaic module.

In the related art, the photovoltaic module is generally bonded to the metal roof through the bonding layer, and the surface state of the metal roof, such as smoothness, cleanliness and the like, can affect the state of the bonding effect, and directly affect the bonding strength between the photovoltaic module and the metal roof. The metal sheets of the metal roof also need to have weather resistance and corrosion resistance required for outdoor use, and therefore, the metal sheets are usually subjected to weather resistance and corrosion resistance through galvanizing or other protective structure layers. For convenience of description, a structural layer provided on the surface of the metal plate for weather resistance and corrosion resistance is defined as a protective layer. The bonding performance of the protective layer and the bonding layer or the insulating layer on the existing metal plate is low, so that the metal plate and the insulating layer cannot be firmly bonded, and the photovoltaic module cannot be firmly bonded on a metal roof.

In order to solve the above problem, an embodiment of the present invention provides a photovoltaic component, which may include a metal back plate and a photovoltaic module formed on the metal back plate. This metal back plate solves bonding effect between current metal sheet and the insulating layer not good, has the problem of debonding risk.

Fig. 1 illustrates a schematic structural diagram of a metal back plate according to an embodiment of the present invention. Referring to fig. 1, the metal back sheet includes a metal plate 1, a first protective layer 2, a second protective layer 3, and an insulating layer 4.

The metal plate 1 is located between the first protective layer 2 and the second protective layer 3, and the selection range is wide, for example: the metal plate 1 may be a steel plate or a steel plate with a plated layer, and may also be a galvanized steel plate or a galvanized aluminum steel plate. Of course, other metal plates not listed are also possible. The main components of the metal plate 1 are metals that can be oxidized and corroded, such as iron and copper, but are not stable metals such as gold and platinum.

The surface of the first protective layer 2 facing the insulating layer 4 has a plurality of hole-like structures. The plurality of cell structures may be formed in a variety of ways. In one example, after the first protective layer 2 is formed on the metal plate 1, a treatment is performed on the surface of the first protective layer 2 facing away from the metal plate 1 to obtain the above-mentioned hole-like structure. The treatment may be chemical treatment, such as acid etching, or physical treatment, such as surface perforation or matte treatment, on the surface. In another example, the first protective layer 2 having a hole-like structure is formed directly on the surface of the metal plate 1. It will be appreciated that the above treatment or shaping is performed on the premise that the protective effect of the first protective layer 2 is not lost.

For example, the first protective layer 2 may be a protective layer formed by directly coating a passivating agent on the surface of the metal plate 1 or a protective layer formed by reacting the passivating agent with the metal surface. It is also possible to form a protective layer in the form of a film by deposition or the like. The passivating agent may be a reagent that reacts with the metal plate 1, such as a chemical reagent, or an organic reagent that does not react with the metal, such as a silicate reagent.

In one possible implementation, referring to fig. 1, the first protective layer 2 may be a dichromate passivation layer. The process of forming the first protective layer 2 may be a dichromate treatment process. The dichromate treatment process, also called passivation process, is a process for converting the metal surface into a film mainly composed of chromate. The dichromate used in the dichromate treatment process reacts with the metal plate 1 to generate a dichromate passivation layer, and the generated gas is released, so that the formed dichromate passivation layer has a rich microporous structure and presents a porous fibrous structure. That is, when the metal plate 1 is passivated by the dichromate treatment process, the surface of the first protective layer 2 facing the insulating layer 4 has a porous fibrous structure forming a plurality of the pore structures.

For example, when the metal plate 1 may be an aluminum-zinc plated steel plate, a steel plate or a zinc-plated steel plate, dichromate undergoes a redox reaction with zinc or iron or aluminum on the metal plate 1 to form chromium oxide (chemical formula: Cr) on the surface of the metal plate 1₂O₃) And chromates (chemical formula MCrO)₄And M is a metal element). Because a large amount of trivalent chromium compounds in the passivation film are difficult to dissolve in water, the penetration of oxygen and moisture in the air is isolated, and the pores of the zinc coating (particularly the zinc coating for electroplating) are sealed. A small amount of 6-valent chromium is distributed in the film, and can repair the wiped passive film to ensure that the slightly torn film is complete again. Accordingly, a dense passivation layer may be formed on the surface of the first protective layer 2 in contact with the metal plate 1. Whereas the first protective layer 2 is facing away from the surface of the metal sheet 1, the composite of chromium oxide and chromate forms a porous fibrous structure, which achieves the above-mentioned improvement of the adhesion of the metal to a paint layer or other organic coating. The first protective layer 2 may have a thickness of 0.1 to 2 μm, and may be a passivation film layer formed by coating an acidic sodium dichromate solution on an aluminum-zinc-plated steel sheet.

The chromate film on the surface of the coating can not only delay the corrosion time of the coating, but also enable the coating to achieve more effective protection on the base metal. Improve the corrosion resistance of the metal or the metal coating.

The insulating layer 4 is formed on the surface of the first protective layer 2 away from the metal plate 1, and may have a thickness of 100-500 μm. When the thickness of the insulating layer is more than 100 microns, the insulating effect can be well ensured. When the thickness of the film is less than 500 micrometers, the film layer is ensured not to be too thick, the too thick film layer has forming stress, and meanwhile, the texture is soft, so that the film layer is inconvenient to combine with a photovoltaic module.

For example, referring to fig. 1, when the insulating layer 4 is pressed to form a metal back plate with the metal plate 1, an adhesive layer 5 may be further added between the insulating layer 4 and the metal plate 1 to achieve connection between the insulating layer 4 and the metal plate 1. The adhesive layer 5 may be formed of a common adhesive such as a polyester adhesive. After 5 coating of adhesive linkage are in first inoxidizing coating 2 on metal sheet 1, through a plurality of pore structure on 2 of first inoxidizing coating, increased

adhesive linkage

5 and 2 area of contact of first inoxidizing coating, the gluing agent can ooze into pore structure simultaneously, forms mechanical structure's riveting effect. Thereby improving the bonding effect of the bonding layer 5 and the first protective layer 2, and further improving the bonding performance of the bonding layer 5 and the metal plate 1. The bonding effect between the insulating layer 4 and the bonding layer 5 is not discussed at this time, and there is no debonding problem between the insulating layer 4 and the bonding layer 5 by default, so the bonding effect between the metal plate 1 and the insulating layer 4 is finally improved by the above technical solution.

For example, fig. 2 illustrates a structure diagram of another metal plate provided in an embodiment of the present invention. Referring to fig. 2, when the insulating layer 4 is directly formed on the metal plate 1 by coating or deposition, etc. After the insulating layer 4 is coated or deposited on the metal plate 1, the contact area between the insulating layer 4 and the first protective layer 2 is increased through the plurality of porous structures on the first protective layer 2, and meanwhile, the insulating layer 4 can penetrate into the porous structures to form the riveting effect of a mechanical structure. Thereby achieving an improved bonding effect of the insulating layer 4 to the first protective layer 2.

Adopt under the condition of above-mentioned technical scheme, the utility model provides a metal back plate through set up first inoxidizing coating 2 and second inoxidizing coating 3 on two surfaces at metal sheet 1, isolated metal sheet 1 and the contact of external corrosive substance for metal sheet 1 satisfies building material's performance requirement, improves metal sheet 1's weatherability and corrosion-resistant function. In addition, in the metal back plate provided by the utility model, the insulating layer 4 is formed on the second protective layer 3, and the insulating layer 4 can meet the electrical insulation requirement combined with the photovoltaic cell; and first inoxidizing coating 2 has a plurality of hole column structures, and a plurality of hole column structures can increase the area of contact of first inoxidizing coating 2 and insulating layer 4 or adhesive linkage 5 to make insulating layer 4 can partly imbed above-mentioned a plurality of hole column structures, form mechanical riveting effect, thereby improve the bonding effect of first inoxidizing coating 2 and insulating layer 4 or adhesive linkage 5, and then strengthen the bonding effect between insulating layer 4 and the metal sheet 1. Through adopting the utility model provides a metal back plate can be so that photovoltaic module can be firm install on the building, improves the life of photovoltaic module on the building.

In a possible implementation, with reference to fig. 1-2, the surface of the first protective layer 2 facing the insulating layer 4 has a porous fibrous structure forming a plurality of cellular structures. The first protective layer 2 may be formed by passivating the metal plate 1 such that a surface of the first protective layer 2 formed on the surface of the metal plate 1 facing away from the metal plate 1 exhibits a porous fibrous structure. The surface of the first protective layer 2 close to the metal plate 1 is a compact film structure, which can isolate the action of corrosive substances. First inoxidizing coating 2 has the porous fibrous structure who forms a plurality of porous structures towards the surface of insulating layer 4, and porous fibrous structure increases the area of contact of first inoxidizing coating 2 and insulating layer 4 to make insulating layer 4 can partly imbed above-mentioned a plurality of porous fibrous structures, form mechanical riveting effect, thereby improve the bonding effect of first inoxidizing coating 2 and insulating layer 4, and then strengthen the bonding effect between insulating layer 4 and the metal sheet 1.

For example, when a polyester material is used for the adhesive layer 5 or the insulating layer 4, the polyester material may penetrate into the porous fiber structure. The adhesive layer 5 may be a layer structure formed by a polyurethane adhesive. The insulating layer 4 may be any one of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polypropylene, polyethylene, polyamide, and polyphenylene oxide. When the adhesive layer 5 or the insulating layer 4 is formed on the surface of the metal plate 1 by coating, it may be one of flat roll coating, gravure roll coating, or extrusion coating.

In one possible implementation, referring to fig. 1-2, the second protective layer 3 may be a fingerprint resistant layer. The metal sheet 1 is formed with a second protective layer 3 on the surface facing away from the photovoltaic module. The second protective layer 3 is in more contact with the hand during the application process of the metal back plate. The second protective layer 3 adopts a fingerprint-resistant layer formed by fingerprint-resistant liquid, and the fingerprint-resistant layer has hydrophobicity and oleophobicity. The fingerprint-resistant layer can prevent the metal back plate from generating finger marks in the application process, and the appearance of the product is attractive.

The second protective layer 3 may be formed by coating a passivating agent on the surface of the metal plate 1, and then directly forming the protective layer by the passivating agent or by reacting the passivating agent with the metal surface. It is also possible to form a protective layer in the form of a film by deposition or the like. The passivating agent may be a reagent that reacts with the metal plate 1, such as a chemical reagent, or an organic reagent that does not react with the metal, such as a silicate reagent.

For example, the second protective layer 3 may be a silicon oxide film layer formed by coating tetraethoxysilane on the surface of the metal plate 1 and hydrolyzing the tetraethoxysilane. The thickness may be 0.1-5 microns. The silicon oxide has a fingerprint resistance function. The second protective layer 3 may also be made of other materials that are resistant to fingerprints, corrosion and weather. The product can avoid finger marks in the application process, and the appearance of the product is kept attractive. Such as can be

In one possible implementation, referring to fig. 1-2, at least one surface of the insulating layer 4 has an adhesion promoting layer. The adhesion promoting layer may increase the adhesion of the insulating side to the adhesive layer 5 or the first protective layer 2 or other structural layers.

For example, the adhesion promoting layer may include at least one of polyester copolymers, polyurethanes, acrylates, silane coupling agents. Preferably, a compound of acrylate and a silane coupling agent is adopted, and the dry adhesive gram weight can be 2-20g/m 2.

Fig. 3 illustrates a structure diagram of another metal back plate according to an embodiment of the present invention. Referring to fig. 3, in a possible implementation, the metal back plate further includes a functional layer 6 having a radiation cooling function, and the functional layer 6 is formed on a surface of the insulating layer 4 away from the first protective layer 2. The radiation refrigeration material has higher radiation efficiency and reflection efficiency in an infrared band with the wavelength of 8-13 microns. Such materials are characterized in that when the material is placed in an environment, the material itself has a lower temperature than the environment, that is, the material has a low absorption coefficient for infrared rays and a high external radiation coefficient, and thus the material has a radiation refrigeration function. Then, the functional layer 6 with the radiation refrigeration function is arranged on the metal back plate, so that the metal back plate can be cooled by the functional layer 6 in the using process. Therefore, the photovoltaic component with the functional layer 6 can reduce the temperature of the photovoltaic module in the use process, thereby ensuring that the generating efficiency of the photovoltaic cell is not reduced due to the temperature rise. Meanwhile, the temperature of the photovoltaic module is reduced, so that the negative influence of high temperature on the photovoltaic module or a photovoltaic component, such as thermal-oxidative aging, can be reduced, and the service life of the photovoltaic module or the photovoltaic component is prolonged.

For example, when a photovoltaic member having the functional layer 6 is used in a building, the amount of heat conducted from the photovoltaic module to the interior of the building can be reduced, and the temperature inside the building can be lowered.

In one possible implementation, referring to fig. 3, the functional layer 6 contains a molding material and a functional material, and the molding material is a transparent molding material or a translucent molding material. The molding material is made of a material with low light energy yield, reduces the absorption of light and can be made of a transparent or semitransparent material. The functional layer 6 formed by the molding material and the functional material is a polymer nano composite material.

For example, the molding material may be one of polyvinylidene fluoride or polyvinylidene fluoride-hexafluoropropylene copolymer. The fluorine-containing polymer is weather-resistant as a molding material. Other transparent or translucent polymeric materials are also possible. And the functional material has a radiation refrigeration function, and can comprise one or two of barium sulfate, alumina or polytetrafluoroethylene.

In order to obtain the metal back plate, the utility model also provides a manufacturing process method of above-mentioned metal back plate:

the first step is as follows: the metal plate 1 is subjected to surface treatment, which comprises degreasing, cleaning and drying.

The second step is that: and (2) passivating, namely coating passivating treatment liquid on two sides of the metal plate 1 by rollers, respectively adding different passivating treatment liquid into passivating liquid tanks on the two sides, wherein one side of the passivating treatment liquid is white emulsion containing tetraethoxysilane, the passivating treatment liquid on the other side of the passivating treatment liquid can be acid solution of sodium dichromate, the pH of the solution is between 1 and 4, and the steel strip coated with the passivating liquid is dried by an oven, wherein the temperature of the oven is lower than 55 ℃.

The third step: and uniformly mixing the main agent of the adhesive according to a certain proportion by using ethyl acetate, adding a proper amount of curing agent, fully stirring and uniformly stirring to prepare the adhesive for coating. The adhesive is uniformly coated on the passivated metal plate 1 in a manner of flat roll coating, gravure roll coating and extrusion coating. The viscosity and the glue coating amount of the glue are strictly controlled. The metal plate 1 coated with the glue needs to pass through a drying tunnel to volatilize the solvent.

The fourth step: and coating the functional layer 6 on the insulating layer 4 material by adopting a roller coating process, and baking and curing in an oven.

The fifth step: and compounding, namely laminating the insulating layer 4 material obtained after the corona treatment and the rubber-coated steel strip. The lamination temperature is 60-80 ℃, and the composite pressure is 90kg/c square meter to 145kg/c square meter. If the functional layer 6 is not arranged, the sixth step is directly carried out.

And a sixth step: and (3) rolling and curing, namely rolling the compounded material and placing the rolled material in a curing room for curing, wherein the curing temperature is 45-75 ℃, and the curing time is 24-72 hours.

The above-mentioned process method is only an example of a process method that can manufacture the above-mentioned metal back plate, and does not limit the structure or material of the metal back plate or the manufacturing process specific to a certain layer structure in any one of the technical solutions provided by the embodiments of the present invention.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The metal back plate is applied to a photovoltaic component and comprises a metal plate, a first protective layer, a second protective layer and an insulating layer;

2. The metal backsheet according to claim 1, wherein a surface of the first protective layer facing the insulating layer has a porous fibrous structure forming a plurality of the pore structures.

3. The metal backsheet according to claim 1, wherein the first protective layer is a dichromate passivation layer.

4. The metal backing sheet according to claim 1, wherein the second protective layer is a fingerprint resistant layer.

5. The metal backplate of claim 1, wherein at least one surface of the insulating layer has an adhesion promoting layer.

6. The metal backsheet according to claim 5, wherein the adhesion promoting layer comprises at least one of polyester copolymer, polyurethane, acrylates, silane coupling agents.

7. The metal backsheet according to any one of claims 1 to 6, further comprising a functional layer having a radiation cooling function, wherein the functional layer is formed on a surface of the insulating layer remote from the first protective layer.

8. The metal backsheet according to claim 7, wherein the functional layer comprises a molding material and a functional material, and the molding material is a transparent molding material or a translucent molding material.

9. The metal backplate of claim 8, wherein the functional material is one or two of barium sulfate, alumina, or polytetrafluoroethylene; and/or the presence of a gas in the gas,

the molding material comprises one of polyvinylidene fluoride or polyvinylidene fluoride-hexafluoropropylene copolymer.

10. A photovoltaic member comprising the metal backsheet according to any one of claims 1 to 9.