阅读说明：本技术 一种光伏组件及其制作方法 (Photovoltaic module and manufacturing method thereof ) 是由 石刚 蔡霞 倪志春 吴镇 曹海波 蒋建彗 陆文华 于 2020-06-16 设计创作，主要内容包括：本申请公开了一种光伏组件制作方法,包括对预先准备好的玻璃进行钢化处理；采用热转印工艺或者热喷涂工艺在钢化处理后的玻璃的表面形成反射膜,得到背面玻璃基板；获得正面玻璃基板；在正面玻璃基板的表面依次叠加设置第一胶膜层、电池片层、第二胶膜层、背面玻璃基板得到光伏组件,且反射膜面向第二胶膜层,电池片层包括多块双面电池片。本申请在制作背面玻璃基板时,先对准备好的玻璃进行钢化处理,然后采用热转印工艺或热喷涂工艺在钢化处理后的玻璃的表面进行镀膜形成反射膜,可以有效减小反射膜处的应力作用,使得到的背面玻璃基板不易发生爆裂,进而降低光伏组件的爆板率,延长光伏组件使用寿命。本申请还提供一种具有上述优点的光伏组件。(The application discloses a photovoltaic module manufacturing method which comprises the steps of carrying out toughening treatment on glass which is prepared in advance; forming a reflecting film on the surface of the tempered glass by adopting a thermal transfer printing process or a thermal spraying process to obtain a back glass substrate; obtaining a front glass substrate; the photovoltaic module is obtained by sequentially superposing and arranging a first adhesive film layer, a battery sheet layer, a second adhesive film layer and a back glass substrate on the surface of the front glass substrate, the reflecting film faces the second adhesive film layer, and the battery sheet layer comprises a plurality of double-sided battery sheets. This application is when preparation back glass substrate, carries out tempering to the glass that prepares earlier, then adopts thermal transfer printing technology or hot spraying technology to carry out the coating film on tempering treated glass's surface and form the reflectance coating, can effectively reduce the stress effect of reflectance coating department for back glass substrate that arrives is difficult for taking place to burst, and then reduces photovoltaic module's the rate of exploding the board, extension photovoltaic module life. The application also provides a photovoltaic module with the advantages.)

1. A method for manufacturing a photovoltaic module is characterized by comprising the following steps:

tempering the glass which is prepared in advance;

forming a reflecting film on the surface of the tempered glass by adopting a thermal transfer printing process or a thermal spraying process to obtain a back glass substrate;

obtaining a front glass substrate;

the surface of the front glass substrate is sequentially overlapped with a first adhesive film layer, a battery sheet layer, a second adhesive film layer, the back glass substrate obtains a photovoltaic module, the reflecting film faces the second adhesive film layer, and the battery sheet layer comprises a plurality of double-sided battery sheets.

2. The method of claim 1, wherein the step of obtaining the back glass substrate using a thermal transfer process comprises:

printing the sizing agent on the adhesive film thermal transfer paper;

and transferring the slurry to the surface of the tempered glass by using thermal transfer printing heating equipment to form the reflecting film, and drying and calcining the reflecting film to obtain the back glass substrate.

3. The method of claim 1, wherein the step of obtaining the back glass substrate using a thermal spray process comprises:

obtaining a slurry in a molten or semi-molten state;

and spraying and depositing the slurry on the surface of the tempered glass, and drying and calcining to obtain the back glass substrate.

4. The method for manufacturing a photovoltaic module according to any one of claims 1 to 3, wherein the double-sided cell sheet is an N-type double-sided cell sheet.

5. The method for manufacturing a photovoltaic module according to claim 4, wherein the first adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer.

6. The method for manufacturing a photovoltaic module according to claim 5, wherein the second adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer.

7. A photovoltaic module obtained by the method for manufacturing a photovoltaic module according to any one of claims 1 to 6.

Technical Field

The application relates to the technical field of photovoltaics, in particular to a photovoltaic module and a manufacturing method thereof.

Background

With the development of the photovoltaic industry and the continuous innovation of the photovoltaic technology, the improvement of the efficiency of the photovoltaic module becomes a target pursued in the photovoltaic industry. Compared with the traditional photovoltaic assembly, the efficiency of the double-glass photovoltaic assembly is obviously improved, and the double-glass photovoltaic assembly becomes a research hotspot in recent years.

The double-glass photovoltaic module adopts the glass substrate on the front and the back, and when the glass substrate on the back is prepared, the glass is sequentially subjected to edge grinding, drilling and drying, then the screen printing technology is adopted to print the pattern on the glass by the sizing agent through the screen printing plate, then the glass is subjected to toughening treatment, and the sizing agent is attached to the surface of the glass to form a reflecting layer, so that the glass substrate on the back is obtained. When the stress at the position of the screen-printed reflecting layer is uneven and is impacted by a heavy object, temperature change and the like, the glass substrate on the back is very easy to burst, so that the service life of the photovoltaic module is very short, and the benefit is influenced.

Therefore, how to solve the above technical problems should be a great concern to those skilled in the art.

Disclosure of Invention

The photovoltaic module and the manufacturing method thereof are provided to solve the problem that a back glass substrate bursts and prolong the service life of the photovoltaic module.

In order to solve the above technical problem, the present application provides a method for manufacturing a photovoltaic module, including:

tempering the glass which is prepared in advance;

forming a reflecting film on the surface of the tempered glass by adopting a thermal transfer printing process or a thermal spraying process to obtain a back glass substrate;

obtaining a front glass substrate;

the surface of the front glass substrate is sequentially overlapped with a first adhesive film layer, a battery sheet layer, a second adhesive film layer, the back glass substrate obtains a photovoltaic module, the reflecting film faces the second adhesive film layer, and the battery sheet layer comprises a plurality of double-sided battery sheets.

Optionally, the process of obtaining the back glass substrate by using a thermal transfer printing process includes:

printing the sizing agent on the adhesive film thermal transfer paper;

and transferring the slurry to the surface of the tempered glass by using thermal transfer printing heating equipment to form the reflecting film, and drying and calcining the reflecting film to obtain the back glass substrate.

Optionally, the process of obtaining the back glass substrate by using the thermal spraying process includes:

obtaining a slurry in a molten or semi-molten state;

and spraying and depositing the slurry on the surface of the tempered glass, and drying and calcining to obtain the back glass substrate.

Optionally, the double-sided battery piece is an N-type double-sided battery piece.

Optionally, the first adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer.

Optionally, the second adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer.

The application also provides a photovoltaic module, and the photovoltaic module is obtained by the manufacturing method of any one of the photovoltaic modules.

The photovoltaic module manufacturing method comprises the steps of carrying out toughening treatment on glass which is prepared in advance; forming a reflecting film on the surface of the tempered glass by adopting a thermal transfer printing process or a thermal spraying process to obtain a back glass substrate; obtaining a front glass substrate; the surface of the front glass substrate is sequentially overlapped with a first adhesive film layer, a battery sheet layer, a second adhesive film layer, the back glass substrate obtains a photovoltaic module, the reflecting film faces the second adhesive film layer, and the battery sheet layer comprises a plurality of double-sided battery sheets.

It can be seen that, when the photovoltaic module manufacturing method in the application is used for manufacturing the back glass substrate, firstly, tempering treatment is carried out on prepared glass to obtain tempered glass, then a thermal transfer printing process or a thermal spraying process is adopted to carry out film coating on the surface of the tempered glass to form a reflecting film, the stress effect at the reflecting film can be effectively reduced, the obtained back glass substrate is not prone to bursting, the plate explosion rate of the manufactured photovoltaic module is further reduced, the safety coefficient is improved, the service life of the photovoltaic module is prolonged, and the cost of the photovoltaic module is reduced.

In addition, this application still provides a photovoltaic module who has above-mentioned advantage.

Drawings

For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart illustrating a method for manufacturing a back glass substrate according to the prior art;

fig. 2 is a flowchart of a method for manufacturing a photovoltaic module according to an embodiment of the present disclosure;

FIG. 3 is a flow chart of a thermal transfer process for making a back glass substrate;

FIG. 4 is a flow chart of a thermal spray process for making a back glass substrate;

fig. 5 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present application.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1, a flow chart of a manufacturing method of a back glass substrate in the prior art is shown, when the back glass substrate is manufactured, a screen printing book technology is adopted to print a pattern on glass through a screen printing plate, and then the glass is tempered, so that the paste is attached to the surface of the glass to form a reflective layer, and the back glass substrate is very easy to crack when the reflective layer is subjected to uneven stress, heavy impact, temperature change and the like.

In view of the above, the present application provides a method for manufacturing a photovoltaic device, please refer to fig. 2, where fig. 2 is a flowchart of a method for manufacturing a photovoltaic device according to an embodiment of the present application, and the method includes:

step S101: tempering the glass prepared in advance.

The toughening treatment process is the same as the toughening treatment process in the prior art, and is not described in detail here.

The glass prepared in advance is obtained by sequentially performing edge grinding, drilling and drying on a glass sheet, the specific operation process is consistent with that in the prior art, and details are not repeated in the embodiment.

Step S102: and forming a reflecting film on the surface of the tempered glass by adopting a thermal transfer printing process or a thermal spraying process to obtain the back glass substrate.

The thermal transfer process and the thermal spray process are explained below.

Referring to fig. 3, the process of obtaining the back glass substrate by using the thermal transfer process includes:

step S201: and printing the sizing agent on the adhesive film thermal transfer paper.

Specifically, the slurry is titanium dioxide slurry, and has the characteristic of good adhesion with glass.

Step S202: and transferring the slurry to the surface of the tempered glass by using thermal transfer printing heating equipment to form the reflecting film, and drying and calcining the reflecting film to obtain the back glass substrate.

Before the reflective film is formed, the tempered glass surface needs to be cleaned to remove surface stains. The reflective film is in a grid shape, and has the same shape as the conventional reflective film.

Referring to fig. 4, the process of obtaining the back glass substrate by using the thermal spraying process includes:

step S301: a slurry in a molten or semi-molten state is obtained.

Specifically, the slurry is titanium dioxide slurry, and has the characteristic of good adhesion with glass.

Step S302: and spraying and depositing the slurry on the surface of the tempered glass, and drying and calcining to obtain the back glass substrate.

Step S103: a front glass substrate is obtained.

Step S104: the surface of the front glass substrate is sequentially overlapped with a first adhesive film layer, a battery sheet layer, a second adhesive film layer, the back glass substrate obtains a photovoltaic module, the reflecting film faces the second adhesive film layer, and the battery sheet layer comprises a plurality of double-sided battery sheets.

It should be noted that the process of sequentially stacking the front glass substrate, the first adhesive film layer, the cell sheet layer, the second adhesive film layer, and the back glass substrate to form the photovoltaic module is well known to those skilled in the art, and will not be described in detail herein.

Optionally, in an embodiment of the present application, the first adhesive film layer is an EVA (Ethylene vinyl acetate) adhesive film layer or a POE (one is a high polymer of Ethylene and butene, and the other is a high polymer of Ethylene and octene) adhesive film layer.

It should be noted that, the second adhesive film layer is not particularly limited in this application, as the case may be. For example, the second adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer.

Preferably, in an embodiment of the present application, the double-sided battery piece is an N-type double-sided battery piece, and the N-type double-sided battery piece has higher battery efficiency than a P-type double-sided battery piece, so that the efficiency of the photovoltaic module is improved and the power is increased.

According to the photovoltaic module manufacturing method, when the back glass substrate is manufactured, tempering treatment is performed on prepared glass to obtain tempered glass, then a heat transfer printing process or a thermal spraying process is adopted to perform film coating on the surface of the tempered glass to form a reflecting film, the stress effect of the reflecting film can be effectively reduced, the obtained back glass substrate is not prone to bursting, the plate explosion rate of the manufactured photovoltaic module is reduced, the safety coefficient is improved, the service life of the photovoltaic module is prolonged, and the cost of the photovoltaic module is reduced.

Referring to fig. 5, the present application further provides a photovoltaic module obtained by the method for manufacturing a photovoltaic module described in the above embodiment, the photovoltaic module includes a front glass substrate 1, a first adhesive film layer 2, a cell sheet layer 3, a second adhesive film layer 4, and a back glass substrate 5, and the cell sheet layer 3 includes a plurality of double-sided cell sheets.

Optionally, the first adhesive film layer 2 is an EVA adhesive film layer or a POE adhesive film layer.

Optionally, the second adhesive film layer 4 is an EVA adhesive film layer or a POE adhesive film layer.

Preferably, the double-sided battery piece is an N-type double-sided battery piece, and the battery efficiency of the N-type double-sided battery piece is higher, so that the efficiency of the photovoltaic module is improved, and the power is increased.

The utility model provides a photovoltaic module includes positive glass substrate, first rete, the battery lamella, the second rete, back glass substrate, earlier when making back glass substrate carry out tempering to the glass that is prepared and handle the glass after obtaining tempering, then adopt thermal transfer printing technology or hot spraying technology to carry out the coating film on tempering treated glass's surface and form the reflectance coating, can effectively reduce the stress effect of reflectance coating department, the back glass substrate that makes is difficult for taking place to burst, and then reduce the photovoltaic module's that makes the slabbing rate, promote factor of safety, prolong photovoltaic module's life, reduce photovoltaic module's cost.

The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The photovoltaic module and the manufacturing method thereof provided by the application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.