Double-glass photovoltaic module

Abstract

The utility model discloses a double-glass photovoltaic module, which relates to the technical field of photovoltaic power generation and comprises front glass, back plate glass, double-sided battery pieces and butyl rubber strips. The double-sided battery piece is bonded and fixed between the front glass and the back plate glass; the butyl rubber strip is sleeved on the peripheral side of the double-sided battery piece, and the butyl rubber strip is packaged on the peripheral edges of the two opposite surfaces of the front glass and the back glass in a hot melting manner; wherein a first packaging adhesive film is bonded and fixed between the front glass and the double-sided battery piece, and a second packaging adhesive film is bonded and fixed between the double-sided battery piece and the back plate glass. According to the utility model, the double-sided battery piece is used for double-sided power generation, thereby improving the power generation power of the photovoltaic assembly; the weather resistance and the fireproof grade of the photovoltaic module are improved by using the double-layer glass; the butyl adhesive tape is sealed at the edges of the front glass and the back glass through hot melting, so that the sealing performance and the service life of the photovoltaic module are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, and more specifically to a double-glass 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. Their function is to convert light energy into electrical energy. The single-glass packaging used in the current mainstream conventional modules has certain defects in weather resistance and fire resistance. With the continuous development of new technologies, the market demand for fire resistance and double-sided power generation has been increasing, giving rise to double-glass photovoltaic modules.

[0004] Double-glass photovoltaic modules are increasingly accepted by customers due to their good packaging and environmental protection characteristics. Some existing double-glass photovoltaic modules use plastic frames or edge-sealing tapes to achieve sealing, while most double-glass photovoltaic modules do not do any processing on the edges of the modules, and only rely on the EVA packaging film laminated in the middle of the double-glass photovoltaic module itself to seal and insulate. Since the water-blocking effect of the EVA packaging film itself is relatively weak, a certain degree of water vapor penetration will occur after long-term use, thus affecting the reliability of the photovoltaic module.

[0005] The current double-glass components are encapsulated with PVB film or EVA film, with double layers of film sandwiched between double layers of glass. However, there is still the problem of water vapor passing through in the middle, which affects the life of the product.

[0006] Therefore, how to provide a double-glass photovoltaic module with good packaging effect and long service life is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0007] In view of this, the utility model provides a double-glass photovoltaic module, which uses double-layer glass to improve the weather resistance and fire resistance level of the photovoltaic module, and uses butyl rubber strips to seal the double-layer glass to improve the packaging effect and service life of the photovoltaic module.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A double-glass photovoltaic module, comprising front glass, back glass, double-sided battery cells and butyl rubber strips;

[0010] The front glass and the back glass are arranged in parallel and at intervals, and the double-sided battery sheet is bonded and fixed between the front glass and the back glass; the butyl rubber strip is sleeved on the periphery of the double-sided battery sheet, and the butyl rubber strip is hot-melt-sealed on the periphery of the two opposite surfaces of the front glass and the back glass;

[0011] Wherein, a first packaging adhesive film is bonded and fixed between the front glass and the double-sided battery cell, and a second packaging adhesive film is bonded and fixed between the double-sided battery cell and the back panel glass.

[0012] The beneficial effect of the above technical solution is that the front glass and the double-sided battery cells are packaged by the first packaging film, and the double-sided battery cells and the back glass are packaged by the second packaging film. At the same time, the front glass and the back glass are hot-melt packaged by butyl strips, and the butyl strips are completely sealed to the edge of the glass after hot melting. The first packaging film, the battery cells and the second packaging film are packaged between the front glass and the back glass, which can play a good protective role. Under long-term use, it can effectively isolate water vapor from entering the battery cells, thereby improving the packaging effect and service life of the photovoltaic module. At the same time, the double-layer glass can improve the fire resistance and weather resistance of the photovoltaic module.

[0013] Preferably, the first packaging film and the second packaging film are EVA films or POE films.

[0014] Preferably, the front glass, back glass and double-sided battery cell are all square structures, the outer peripheral dimensions of the front glass and the back glass are the same, and the outer peripheral dimension of the double-sided battery cell is smaller than the outer peripheral dimensions of the front glass and the back glass.

[0015] Preferably, the outer circumference size of the first packaging film and the second packaging film is the same as the outer circumference size of the double-sided battery cell.

[0016] Preferably, the bifacial cell is composed of a front cell and a back cell connected in series, and an air induction cavity is provided between the opposite panels of the front cell and the back cell. The photovoltaic module can generate electricity on both sides, thereby increasing the power generation of the photovoltaic module.

[0017] Preferably, a plurality of electrodes are fixed on both the front panel battery cell and the back panel battery cell.

[0018] Preferably, the back panel glass is installed on the roof of the building through a fixing seat.

[0019] Preferably, the thickness of the front glass and the back glass is 2.0-3.2 mm.

[0020] Preferably, the thickness of the first packaging film and the second packaging film is 200-600 μm.

[0021] Preferably, the butyl rubber strip has a thickness of 0.5 mm and a width of 5 to 7 mm, and four butyl rubber strips are connected end to end to form a square hollow structure.

[0022] It can be seen from the above technical solutions that, compared with the prior art, the utility model discloses a double-glass photovoltaic module, which adopts double-sided solar cells for double-sided power generation, thereby improving the power generation capacity of the photovoltaic module; utilizes double-layer glass to improve the weather resistance and fire resistance level of the photovoltaic module; and uses butyl rubber strips to hot-melt seal the edges of the front glass and the back glass, thereby improving the sealing performance and service life of the photovoltaic module.

[0023] The double-glass photovoltaic component provided by the utility model can effectively isolate the corrosion of water vapor to the battery layer, ensure that it will not age after 25 years of use, and at the same time improve the fire prevention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 A cross-sectional view of a photovoltaic module provided by the utility model;

[0026] Figure 2 A top view of the butyl rubber strip provided by the utility model;

[0027] Figure 3 This is a cross-sectional view of a double-sided battery cell provided by the utility model.

[0028] in,

[0029] 1-front glass; 2-first packaging film; 3-double-sided battery cell; 31-front battery cell; 32-back battery cell; 33-causing cavity; 34-electrode; 4-second packaging film; 5-back glass; 6-butyl adhesive strip. DETAILED DESCRIPTION

[0030] 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.

[0031] See attached Figures 1 to 3 The utility model embodiment discloses a double-glass photovoltaic module, which can generate electricity on both sides, improve the power generation of the photovoltaic module, use double-layer glass to improve the durability and fireproof level of the photovoltaic module, and use butyl rubber strips to seal the edges of the double-layer glass, so that the sealing effect is good and the service life is long, including front glass 1, back glass 5, double-sided battery cell 3 and butyl rubber strips 6;

[0032] The front glass 1 and the back glass 5 are arranged in parallel and at intervals, and the double-sided battery sheet 3 is bonded and fixed between the front glass 1 and the back glass 5; the butyl rubber strip 6 is sleeved on the peripheral side of the double-sided battery sheet 3, and the butyl rubber strip 6 is hot-melt-sealed on the peripheral edges of the two opposite surfaces of the front glass 1 and the back glass 5;

[0033] Among them, a first packaging adhesive film 2 is bonded and fixed between the front glass 1 and the double-sided battery cell 3 , and a second packaging adhesive film 4 is bonded and fixed between the double-sided battery cell 3 and the back plate glass 5 .

[0034] In order to further optimize the above technical solution, the first encapsulation film 2 and the second encapsulation film 4 are EVA films or POE films. The EVA films or POE films are used to encapsulate the surface of the double-sided solar cell to ensure the water resistance of the photovoltaic module.

[0035] In order to further optimize the above technical solution, the front glass 1, the back glass 5, and the double-sided cell 3 are all square structures, the outer perimeters of the front glass 1 and the back glass 5 are the same, and the outer perimeters of the double-sided cell 3 are smaller than the outer perimeters of the front glass 1 and the back glass 5. The double-sided cell is clamped between the front glass and the back glass, and the side of the double-sided cell is encapsulated by a butyl adhesive strip. At the same time, the butyl adhesive strip can be encapsulated at the edge between the front glass and the back glass after hot melting. The butyl adhesive strip can improve the encapsulation effect between the front glass, the double-sided cell and the surrounding side of the back glass, prevent water vapor from entering and corroding the double-sided cell, and ensure the service life of the photovoltaic module.

[0036] In order to further optimize the above technical solution, the outer circumference size of the first packaging film 2 and the second packaging film 4 is the same as the outer circumference size of the double-sided battery cell 3 .

[0037] In this embodiment, the bifacial cell 3 is composed of a front cell 31 and a back cell 32 connected in series, and an air induction cavity 33 is provided between the opposite surfaces of the front cell 31 and the back cell 32. The air induction cavity can be vented to ensure that no bubbles are generated during the packaging process, which can affect the production quality of the photovoltaic module.

[0038] The first packaging film is tightly attached to the surface of the front panel cell to ensure the packaging effect between the front panel cell and the front glass; the second packaging film is tightly attached to the surface of the back panel cell to ensure the packaging effect between the back panel cell and the back panel glass; a thinner packaging film is used to package the top and surface of the double-sided cell, and at the same time, butyl tape is used to package the surrounding side of the double-sided cell to ensure the packaging effect of the double-sided cell, effectively isolate the entry of water vapor, and increase the service life of the photovoltaic module.

[0039] In order to further optimize the above technical solution, multiple electrodes 34 are fixed on both the front panel solar cell 31 and the back panel solar cell 32. Both sides of the double-sided solar cell can generate electricity, which improves the power generation of the photovoltaic module.

[0040] In this embodiment, the back panel glass 5 is installed on the roof of the building through a fixing seat.

[0041] In order to further optimize the above technical solution, the thickness of the front glass 1 and the back glass 5 is 2.0 to 3.2 mm.

[0042] In order to further optimize the above technical solution, the thickness of the first packaging film 2 and the second packaging film 4 is 200-600 μm.

[0043] In order to further optimize the above technical solution, the thickness of the butyl rubber strip 6 is 0.5 mm, the width is 5 to 7 mm, and four butyl rubber strips 6 are connected end to end to form a square hollow structure.

[0044] The overall thickness of the photovoltaic module is relatively thin, which meets the demand for lightweight and reduces the weight of the photovoltaic module, making installation and use more convenient and quick.

[0045] 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.

[0046] 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 double-glass photovoltaic module, characterized in that: include: Front glass (1), back glass (5), double-sided battery cell (3) and butyl rubber strip (6); The front glass (1) and the back glass (5) are arranged in parallel and at intervals, and the double-sided battery sheet (3) is bonded and fixed between the front glass (1) and the back glass (5); the butyl rubber strip (6) is sleeved on the peripheral side of the double-sided battery sheet (3), and the butyl rubber strip (6) is hot-melt-sealed on the peripheral edges of the two opposite surfaces of the front glass (1) and the back glass (5); A first packaging adhesive film (2) is bonded and fixed between the front glass (1) and the double-sided battery cell (3), and a second packaging adhesive film (4) is bonded and fixed between the double-sided battery cell (3) and the back panel glass (5).

2. A double-glass photovoltaic module according to claim 1, characterized in that: The first packaging adhesive film (2) and the second packaging adhesive film (4) are EVA adhesive films or POE adhesive films.

3. A double-glass photovoltaic module according to claim 1, characterized in that: The front glass (1), the back glass (5), and the double-sided battery cell (3) are all of square structure; the outer peripheral dimensions of the front glass (1) and the back glass (5) are the same; and the outer peripheral dimensions of the double-sided battery cell (3) are smaller than the outer peripheral dimensions of the front glass (1) and the back glass (5).

4. A double-glass photovoltaic module according to claim 3, characterized in that: The outer circumference dimensions of the first encapsulation adhesive film (2) and the second encapsulation adhesive film (4) are the same as the outer circumference dimensions of the double-sided battery cell (3).

5. A double-glass photovoltaic module according to claim 1, characterized in that: The double-sided battery cell (3) is composed of a front battery cell (31) and a back battery cell (32) connected in series, and an air introduction cavity (33) is provided between the opposite plate surfaces of the front battery cell (31) and the back battery cell (32).

6. A double-glass photovoltaic module according to claim 5, characterized in that: A plurality of electrodes (34) are fixed on both the front panel battery sheet (31) and the back panel battery sheet (32).

7. A double-glass photovoltaic module according to claim 1, characterized in that: The back panel glass (5) is installed on the roof of the building via a fixing seat.

8. A double-glass photovoltaic module according to claim 1, characterized in that: The thickness of the front glass (1) and the back glass (5) is 2.0 to 3.2 mm.

9. A double-glass photovoltaic module according to claim 1, characterized in that: The thickness of the first packaging adhesive film (2) and the second packaging adhesive film (4) is 200-600 μm.

10. A double-glass photovoltaic module according to claim 1, characterized in that: The thickness of the butyl rubber strip (6) is 0.5 mm and the width is 5 to 7 mm. Four butyl rubber strips (6) are connected end to end to form a square hollow structure.

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