Light flexible photovoltaic module based on multi-layer composite adhesive film

Abstract

The utility model discloses a light flexible photovoltaic module based on a multilayer composite adhesive film, which relates to the technical field of photovoltaic power generation and comprises a front plate layer, a back plate layer, a battery piece layer and an adhesive film composite layer. The front plate layer is a sunny side of the photovoltaic module so as to absorb sunlight; the back plate layer is a nightside of the photovoltaic module so as to be bonded and fixed with a building structure; the battery piece layer is arranged between the front plate layer and the back plate layer for photovoltaic power generation; the plurality of adhesive film composite layers are bonded and fixed between the front plate layer and the battery piece layer and between the battery piece layer and the back plate layer; pOE films are arranged on the two sides of the adhesive film composite layer, and a glass fiber film is integrally formed between the two POE films. According to the utility model, the adhesive film composite layer is used as a packaging layer of the battery piece, a nine-layer structure of a conventional light flexible photovoltaic module can be simplified into a five-layer structure, the stability and the impact resistance of the photovoltaic module are improved, the thickness of the photovoltaic module can be obviously reduced by the adhesive film composite layer, the risk of generating bubbles in the production process is reduced, and the reject ratio is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, and more specifically to a lightweight flexible photovoltaic component based on a multi-layer composite adhesive film. Background Art

[0002] With the rapid development of society, people are increasingly aware of the limitations of non-renewable energy such as oil, and are constantly trying to develop new energy to cope with the upcoming energy crisis. At the same time, oil, coal and other energy sources will inevitably pollute the environment during use. As people's awareness of environmental protection increases, the requirements for clean energy are also getting higher and higher. Solar energy, as an efficient, pollution-free renewable resource, has gradually been used by all walks of life. With the improvement of environmental protection awareness, the development of photovoltaic power generation has been steadily advancing.

[0003] Photovoltaic modules are the core components of photovoltaic power generation systems, and their function is to convert light energy into electrical energy. Encapsulation materials play a role in bonding and protection in photovoltaic modules. More and more cells are used in photovoltaic modules, and the performance of various cells is different, and the requirements for encapsulation films are also different; for example, P-type cells require films with high PID resistance; heterojunction cells with round welding strips require films with non-slip surfaces; CIGS cells are afraid of heat and require low-temperature lamination, etc. The requirements for encapsulation films are getting higher and higher, and single-layer films or single materials are difficult to meet the encapsulation requirements.

[0004] Therefore, how to provide a lightweight and flexible photovoltaic module based on a multi-layer composite adhesive film to ensure the packaging effect of the photovoltaic module is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] In view of this, the utility model provides a lightweight flexible photovoltaic module based on a multi-layer composite film. The composite film material is used to solve the problems of complex multi-layer film structure, cumbersome operation process and easy errors in the production process of flexible photovoltaic modules. The product with up to 9 layers is simplified to a 5-layer structure, thereby improving production efficiency and reducing losses in the production process.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A lightweight flexible photovoltaic module based on a multi-layer composite adhesive film, comprising:

[0008] Front plate layer, back plate layer, battery sheet layer and film composite layer;

[0009] The front plate layer is the sun-facing side of the photovoltaic module to absorb sunlight; the back plate layer is the sun-facing side of the photovoltaic module to be bonded and fixed to the building structure; the battery layer is arranged between the front plate layer and the back plate layer to perform photovoltaic power generation; a plurality of the adhesive film composite layers are bonded and fixed between the front plate layer and the battery layer and between the battery layer and the back plate layer;

[0010] Both surfaces of the adhesive film composite layer are POE films, and a glass fiber film is integrally laminated between the two layers of the POE films.

[0011] The beneficial effect of the above technical solution is that, by using the film composite layer as the encapsulation layer of the battery cell, the 9-layer structure of the conventional lightweight flexible photovoltaic module can be simplified to a 5-layer structure, thereby increasing the stability and impact resistance of the photovoltaic module. The film composite layer can significantly reduce the thickness of the photovoltaic module, reduce the risk of bubbles generated during the production process, and reduce the defective rate.

[0012] Preferably, the glass fiber membrane and the POE membrane are formed by rolling multiple layers into one composite.

[0013] Preferably, a plurality of air holes are provided on the surface of the glass fiber membrane.

[0014] Preferably, the front plate layer and the back plate layer are both made of a water-blocking film.

[0015] Preferably, the front plate layer, the adhesive film composite layer, the battery sheet layer and the back plate layer are fixed by bonding.

[0016] Preferably, the cell layer is formed by 36 or 72 groups of monocrystalline silicon or polycrystalline silicon cells connected in series.

[0017] Preferably, the backboard layer is bonded and fixed to the roof or wall of a building.

[0018] Preferably, the thickness of the adhesive film composite layer is 450-600 microns.

[0019] It can be seen from the above technical scheme that compared with the prior art, the utility model discloses a lightweight and flexible photovoltaic module based on a multi-layer composite film, which is composited with two layers of POE film with high water resistance, and a glass fiber film is added between the two layers of POE film to increase the stability and impact resistance of the photovoltaic module. The design of the film composite layer reduces the thickness of the product, reduces the risk of bubbles in the production process, and reduces the defective rate; in the production process of the film composite layer, the multiple layers are composited together by roll forming, which solves the problems of lightweight and impact resistance of the photovoltaic module; the main characteristics of the photovoltaic module provided by the utility model are that the photovoltaic module is light in weight, high in water resistance, good in flexibility, and can be bent at a certain angle without affecting its power generation power. It can be directly bonded to the roof or wall of a building for use, and is easy and quick to install. After testing, it can meet the requirements of 25 years of non-aging use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the photovoltaic module structure provided by the utility model;

[0022] Figure 2 A schematic diagram of the structure of the adhesive film composite layer provided by the utility model;

[0023] Figure 3 This is a top view of the glass fiber membrane provided by the utility model.

[0024] in,

[0025] 1-front plate layer; 2-adhesive film composite layer; 21-POE film; 22-glass fiber film; 3-cell layer; 4-back plate layer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See attached Figures 1 to 3The utility model embodiment discloses a lightweight flexible photovoltaic module based on a multi-layer composite adhesive film, which is used in the packaging of lightweight flexible photovoltaic modules. The composite adhesive film layer packaging film simplifies the production process of the product, improves the impact strength of the product, and reduces the loss in the production process. The front plate layer 1, the back plate layer 4, the battery layer 3 and the adhesive film composite layer 2;

[0028] The front plate layer 1 is the sun-facing side of the photovoltaic module to absorb sunlight; the back plate layer 4 is the sun-facing side of the photovoltaic module to be bonded and fixed to the building structure; the battery layer 3 is arranged between the front plate layer 1 and the back plate layer 4 to perform photovoltaic power generation; multiple adhesive film composite layers 2 are bonded and fixed between the front plate layer 1 and the battery layer 3 and between the battery layer 3 and the back plate layer 4;

[0029] Both surfaces of the adhesive film composite layer 2 are POE films 21 , and a glass fiber film 22 is integrally laminated between the two layers of POE films 21 .

[0030] The front panel layer and the battery cell layer, as well as the battery cell layer and the back panel layer are encapsulated with a composite film layer, which reduces the thickness of the photovoltaic module and meets the requirements of lightweight use. At the same time, the 9-layer structure of the conventional photovoltaic module is simplified to a 5-layer structure, greatly reducing the production cost of the photovoltaic module and the complexity of battery cell packaging.

[0031] In order to further optimize the above technical solution, the glass fiber membrane 22 and the POE membrane 21 are rolled and formed into a multi-layer composite. A layer of glass fiber membrane is sandwiched between the two layers of POE membrane and rolled as a packaging membrane, which not only prevents the battery layer from being washed by rainwater, but also increases the stability and impact resistance of the photovoltaic module, making it have a certain toughness, and does not affect the performance of the photovoltaic module after bending and deformation, and is convenient for transportation.

[0032] In order to further optimize the above technical solution, a plurality of air holes are provided on the surface of the glass fiber membrane 22. The air holes are provided to prevent bubbles from being generated between the glass fiber membrane and the POE membrane during the rolling process, thereby ensuring that the surface of the encapsulation film of the photovoltaic module is smooth and free of bubbles, thereby ensuring the power generation effect of the battery cell.

[0033] In order to further optimize the above technical solution, the front plate layer 1 and the back plate layer 4 are both made of water-blocking film. The front plate and the back plate are made of water-blocking film to improve the water-blocking effect of the photovoltaic module, ensure that the battery cell is not corroded by water and affects its power generation effect, and at the same time reduce the weight of the photovoltaic module, making installation and use more convenient and quick.

[0034] In order to further optimize the above technical solution, the front plate layer 1, the adhesive film composite layer 2, the battery cell layer 3 and the back plate layer 4 are fixed by bonding.

[0035] The front panel layer and the battery layer are directly bonded to a fixed film composite layer, and the battery layer and the back panel layer are bonded to a fixed film composite layer. The film composite layer is used as a packaging layer to package the front panel layer, the battery layer and the back panel layer into a whole to form a lightweight flexible photovoltaic module.

[0036] In order to further optimize the above technical solution, the cell layer 3 is composed of 36 or 72 groups of monocrystalline silicon or polycrystalline silicon cells connected in series. A single photovoltaic module can meet the output voltage of 12V or 24V, and multiple photovoltaic modules connected in series can meet the electricity demand of industrial and commercial plants and families. At the same time, the excess electricity generated can be transmitted to the power grid, reducing the power consumption pressure of the environmental power grid, and using solar energy to generate electricity to meet environmental protection requirements.

[0037] In order to further optimize the above technical solution, the back plate layer 4 is bonded and fixed to the roof or wall of the building.

[0038] When in use, the photovoltaic modules are bonded and fixed to the roof or wall with adhesive. The installation is convenient and quick. There is no need to use special brackets to install the photovoltaic modules. The application range is wide and is not restricted by conditions.

[0039] In order to further optimize the above technical solution, the thickness of the adhesive film composite layer 2 is 450-600 microns, which reduces the thickness of the entire photovoltaic module and makes it have a certain toughness and impact resistance, and does not affect the power generation after bending and deformation.

[0040] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lightweight flexible photovoltaic module based on a multi-layer composite adhesive film, characterized in that: include: A front plate layer (1), a back plate layer (4), a battery sheet layer (3) and an adhesive film composite layer (2); The front plate layer (1) is the sun-facing side of the photovoltaic module for absorbing sunlight; the back plate layer (4) is the sun-facing side of the photovoltaic module for bonding and fixing to a building structure; the cell layer (3) is arranged between the front plate layer (1) and the back plate layer (4) for photovoltaic power generation; a plurality of adhesive film composite layers (2) are bonded and fixed between the front plate layer (1) and the cell layer (3) and between the cell layer (3) and the back plate layer (4); Both surfaces of the adhesive film composite layer (2) are POE films (21), and a glass fiber film (22) is integrally laminated between the two layers of the POE films (21).

2. A lightweight flexible photovoltaic module based on a multi-layer composite adhesive film according to claim 1, characterized in that: The glass fiber membrane (22) and the POE membrane (21) are prepared and formed by rolling multi-layer composite integration.

3. A lightweight flexible photovoltaic module based on a multi-layer composite adhesive film according to claim 2, characterized in that: The surface of the glass fiber membrane (22) is provided with a plurality of air holes.

4. A lightweight flexible photovoltaic module based on a multi-layer composite adhesive film according to claim 1, characterized in that: The front plate layer (1) and the back plate layer (4) are both made of a water-blocking film.

5. A lightweight flexible photovoltaic module based on a multi-layer composite adhesive film according to claim 4, characterized in that: The front plate layer (1), the adhesive film composite layer (2), the battery sheet layer (3) and the back plate layer (4) are fixed by bonding.

6. According to the lightweight flexible photovoltaic module based on a multi-layer composite adhesive film as described in claim 1, the cell layer (3) is composed of 36 groups or 72 groups of single crystal silicon or polycrystalline silicon cells connected in series.

7. According to the lightweight flexible photovoltaic module based on a multi-layer composite adhesive film as described in claim 1, the backboard layer (4) is bonded and fixed on the roof or wall of a building.

8. According to the lightweight flexible photovoltaic module based on a multi-layer composite adhesive film as claimed in claim 1, the thickness of the adhesive film composite layer (2) is 450 to 600 microns.

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