Lightweight flexible photovoltaic module

Abstract

The utility model discloses a light flexible photovoltaic module, which relates to the technical field of photovoltaic power generation and comprises a front plate film, a battery piece layer and a back plate film which are sequentially formed in a hot melting and laminating mode from top to bottom. Packaging adhesive film layers are bonded and fixed between the front plate film and the battery piece layer and between the battery piece layer and the back plate film; the packaging adhesive film layer comprises a PVDF film, a glass fiber film and a POE film which are sequentially bonded in a hot melting mode. According to the utility model, glass is replaced by the front plate film, so that the weight of the photovoltaic module is about 2kg per square meter, and compared with the traditional photovoltaic module, the weight is reduced by 80%; a POE (Polyolefin Elastomer) adhesive film and a PVDF (Polyvinylidene Fluoride) adhesive film are adopted as packaging adhesive films, so that water vapor can be effectively prevented from entering the photovoltaic module to erode a battery piece And meanwhile, the glass fiber film is additionally arranged on the interlayer structure of the packaging adhesive film, so that the mechanical property of the photovoltaic module can be improved, the photovoltaic module has certain flexibility, the generated power is not influenced after repeated bending, and the packaging adhesive film can be used on some arc-shaped surfaces and is wide and reliable in installation range.

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. 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. The current mainstream conventional modules use a layer of 3.2mm thick glass and a metal aluminum frame, and their own weight is about 12 kilograms per square meter. During the installation process, the weight of the profile frame must be added, and the load-bearing capacity of some industrial and commercial roofs cannot meet this requirement.

[0004] Since traditional photovoltaic modules use tempered glass as the surface packaging material, tempered glass has high hardness, so traditional photovoltaic modules have the disadvantages of being inflexible and inflexible, and cannot be installed on curved objects; at the same time, the thickness of the glass is generally above 3.2mm, and the weight of the module cannot meet the requirements of lightweight installation.

[0005] Therefore, how to provide a lightweight flexible photovoltaic module that is light in weight, easy and quick to install, and has a wide range of installation is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] In view of this, the utility model provides a lightweight flexible photovoltaic module, aiming to solve the above technical problems.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A lightweight flexible photovoltaic module, comprising a front plate film, a battery layer and a back plate film which are formed by hot-melt lamination in sequence from top to bottom;

[0009] A packaging adhesive film layer is bonded and fixed between the front plate film and the battery sheet layer, and between the battery sheet layer and the back plate film;

[0010] The packaging adhesive film layer comprises a PVDF film, a glass fiber film and a POE film which are bonded in sequence by hot-melt lamination.

[0011] The beneficial effect of the above technical solution is that the traditional heavy glass is replaced by a flexible and highly weather-resistant front panel film, and a glass fiber film is added in the middle of the layer structure to increase the impact resistance of the product, reduce the aluminum frame matching the glass, and reduce the weight of the product. At the same time, it can allow the photovoltaic module to adapt to a certain bending angle, and the performance of the product will not be affected after repeated bending. During use, it can be installed on the roof of a factory building or other building with a certain curvature or light weight.

[0012] Preferably, the outer surface of the front plate film is coated with an anti-reflection and anti-reflection film liquid, which can increase the light transmission effect of the front plate film and ensure the power generation of the battery layer.

[0013] Preferably, the back sheet film is bonded and fixed on the roof or wall of the building. The photovoltaic module is installed by gluing, which is convenient and fast, and improves the installation efficiency of the photovoltaic power generation system.

[0014] Preferably, the thickness of the encapsulation film layer is 0.3-0.6 mm, thereby reducing the thickness and weight of the photovoltaic module.

[0015] Preferably, the cell layer is composed of a plurality of groups of front photovoltaic cells or double-sided photovoltaic cells connected in series. As required, the photovoltaic module can generate electricity in one direction or in two directions.

[0016] Preferably, the front plate film and the battery layer, and the battery layer and the back plate film are hot-melt packaged by the packaging film layer, which has a good packaging effect and prevents water vapor from corroding the battery layer.

[0017] Preferably, the hot melt curing temperature does not exceed 170°C.

[0018] Preferably, four connection holes are opened at four corners of the photovoltaic module, and a plurality of photovoltaic modules form a photovoltaic power generation system through the connection holes.

[0019] Through the above technical solutions, it can be known that compared with the prior art, the utility model discloses a lightweight flexible photovoltaic module. In view of the current situation that some industrial roof factories have limited load-bearing capacity and cannot be equipped with relatively heavy glass frame modules, the utility model replaces the glass with a front plate film, so that the weight of the photovoltaic module is about 2kg per square meter, which is 80% lighter than the traditional photovoltaic module; the encapsulation film adopts POE film and PVDF film, which can effectively prevent water vapor from entering the photovoltaic module and corroding the battery cells; at the same time, a glass fiber film is added to the interlayer structure of the encapsulation film, which can improve the mechanical properties of the photovoltaic module and make it have a certain flexibility. It will not affect the power generation after repeated bending, and can be used on some curved surfaces, with a wide and reliable installation range. 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 described below 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 packaging structure provided by the utility model;

[0022] Figure 2 This is a front view of the photovoltaic module provided by the utility model.

[0023] in,

[0024] 1-front plate film; 2-cell layer; 3-back plate film; 4-POE film; 5-glass fiber film; 6-PVDF film; 7-connection hole. DETAILED DESCRIPTION

[0025] 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.

[0026] See attached Figure 1 and 2 The utility model embodiment discloses a lightweight flexible photovoltaic module, which is light in weight, has a long service life, and does not affect its power generation after repeated bending, and can be installed on a curved building, including a front plate film 1, a battery layer 2 and a back plate film 3 formed by hot-melt lamination in sequence from top to bottom;

[0027] A packaging film layer is bonded and fixed between the front plate film 1 and the battery layer 2, and between the battery layer 2 and the back plate film 3;

[0028] The packaging film layer comprises a PVDF film 6, a glass fiber film 5 and a POE film 4 which are bonded in sequence by hot-melt lamination.

[0029] In order to further optimize the above technical solution, improve the light transmittance of the front plate film, and ensure the power generation effect of the battery layer, the outer surface of the front plate film 1 is coated with an anti-reflection and anti-reflection film liquid.

[0030] In this embodiment, the back sheet membrane 3 is bonded and fixed on the roof or wall of the building. It can be installed on the color steel tile roof of industrial and commercial plants, the top surface of agricultural greenhouses or parking sheds, the top of yachts, the roof of cars and some curved buildings through adhesives, and has a wide range of uses.

[0031] In order to further optimize the above technical solution, the thickness of the encapsulation film layer is 0.3-0.6 mm, which can reduce the thickness of the photovoltaic module while ensuring the encapsulation effect and ensure its certain bending ability.

[0032] In order to further optimize the above technical solution, the cell layer 2 is composed of multiple groups of front photovoltaic cells or double-sided photovoltaic cells connected in series. According to the needs of users, front photovoltaic cells can be selected for single-sided power generation, or double-sided photovoltaic cells can be selected for double-sided power generation.

[0033] In order to further optimize the above technical solution, the front plate film 1 and the battery layer 2, and the battery layer 2 and the back plate film 3 are hot-melt packaged by the packaging adhesive film layer.

[0034] The hot melt curing temperature does not exceed 170°C.

[0035] Through the principle of hot melting, the battery layer is encapsulated between the front plate film and the back plate film. The encapsulation effect is good and can effectively prevent water vapor from entering the battery layer and affecting its power generation effect.

[0036] In this embodiment, four connection holes 7 are opened at the four corners of the photovoltaic module, and a plurality of photovoltaic modules are connected through the connection holes 7 to form a photovoltaic power generation system.

[0037] During installation, two adjacent photovoltaic modules can be connected in series through the connection holes on their respective sides. Multiple photovoltaic modules form a photovoltaic power generation system, which can supply power to the buildings below. At the same time, excess electricity can also be transmitted to the power grid for other users, thereby improving resource utilization, reducing environmental pollution, and facilitating the implementation of energy-saving and emission reduction measures.

[0038] 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.

[0039] 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, characterized in that: It comprises a front plate film (1), a battery layer (2) and a back plate film (3) which are formed by hot-melt lamination in sequence from top to bottom; A packaging adhesive film layer is bonded and fixed between the front plate film (1) and the battery layer (2), and between the battery layer (2) and the back plate film (3); The packaging adhesive film layer comprises a PVDF film (6), a glass fiber film (5) and a POE film (4) bonded in sequence by hot-melt lamination.

2. A lightweight flexible photovoltaic module according to claim 1, characterized in that: The outer surface of the front plate film (1) is coated with an anti-reflection and anti-reflection film liquid.

3. A lightweight flexible photovoltaic module according to claim 1, characterized in that: The backboard membrane (3) is bonded and fixed on the roof or wall of a building.

4. A lightweight flexible photovoltaic module according to claim 1, characterized in that: The thickness of the packaging film layer is 0.3-0.6 mm.

5. A lightweight flexible photovoltaic module according to claim 1, characterized in that: The cell layer (2) is composed of a plurality of groups of front photovoltaic cell sheets or double-sided photovoltaic cell sheets connected in series.

6. A lightweight flexible photovoltaic module according to claim 1, characterized in that: The front plate film (1) and the battery layer (2), and the battery layer (2) and the back plate film (3) are hot-melt packaged by the packaging adhesive film layer.

7. A lightweight flexible photovoltaic module according to any one of claims 1 to 6, characterized in that: Four connection holes (7) are provided at the four corners of the photovoltaic component, and a plurality of photovoltaic components are connected through the connection holes (7) to form a photovoltaic power generation system.

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