Double-layer light photovoltaic module with PETG front plate

Abstract

The utility model discloses a double-layer light photovoltaic module with a PETG front plate. The double-layer light photovoltaic module comprises the PETG front plate, a water vapor barrier film, a lower conversion adhesive film, a battery piece, a conventional adhesive film and a light back plate which are arranged in sequence, the water vapor barrier film is adhered to the PETG front plate, the water vapor barrier film is adhered to the battery piece through the lower conversion adhesive film, and the light back plate is adhered to the battery piece through the conventional adhesive film; and the PETG front plate, the water vapor barrier film and the lower conversion adhesive film are all of transparent structures. According to the utility model, through the arrangement of the PETG front plate, the extruded plate of the PETG plate is generally 15-20 times more tough than general acrylic and 5-10 times more tough than impact-resistant modified acrylic, so that the silicon battery piece can be better protected; through the arrangement of the water vapor barrier film, the capability of blocking water vapor can be achieved, and the problem that in the prior art, water vapor permeates through the front plate and corrodes the battery piece, and consequently the power attenuation of the battery piece is high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a double-layer lightweight photovoltaic component with a PETG front plate. Background Art

[0002] Lightweight modules use composite materials to replace traditional module glass, which retains the advantages of crystalline silicon solar power generation to the greatest extent while giving full play to the characteristics of thin-film technology with a wide range of application scenarios.

[0003] However, the composite front and back panels of solar cells currently on the market are relatively brittle, insufficiently protecting the crystalline silicon cells from single-point impacts. This leads to hidden cracks in the crystalline silicon cells, resulting in significant power attenuation during hail tests. Furthermore, the cells have poor aging resistance, experiencing significant power attenuation after UV aging. Water vapor easily penetrates the front panel, corroding the cells and causing significant power attenuation.

[0004] PETG (polyethylene terephthalate-1,4-cyclohexanedimethanol) is a transparent, non-crystalline copolyester. PETG sheet has outstanding toughness and high impact strength. Its impact strength is 3 to 10 times that of modified polyacrylates. It has a wide processing range, high mechanical strength and excellent flexibility. Compared with PVC, it has higher transparency, better gloss, is easy to print and has environmental advantages.

[0005] Therefore, based on the PETG sheet, a double-layer lightweight photovoltaic module with a PETG front plate is proposed to solve the problems of low impact strength and poor water-proof effect of existing lightweight modules. Utility Model Content

[0006] The purpose of the utility model is to provide a double-layer lightweight photovoltaic module with a PETG front plate to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above-mentioned object, the utility model provides a double-layer lightweight photovoltaic module with a PETG front plate, comprising a PETG front plate, a water vapor barrier film, a lower conversion film, a battery cell, a conventional film and a lightweight back plate arranged in sequence; the water vapor barrier film is adhered to the PETG front plate, the water vapor barrier film and the battery cell are adhered to each other via the lower conversion film, and the lightweight back plate and the battery cell are adhered to each other via the conventional film; the PETG front plate, the water vapor barrier film and the lower conversion film are all transparent structures.

[0008] Preferably, a fiber support layer is provided between the lower conversion film and the battery cell, and the fiber support layer is provided inside the lower conversion film.

[0009] Preferably, the thickness of the fiber support layer ranges from 100 μm to 800 μm, and the gram weight of the fiber support layer ranges from 100 g / ㎡ to 900 g / ㎡.

[0010] Preferably, the thickness of the PETG front plate is 0.2 mm to 5 mm.

[0011] Preferably, the water vapor barrier film is a polyolefin barrier film or a vapor deposition barrier film, and the thickness of the water vapor barrier film is 5 μm to 100 μm.

[0012] Preferably, the lower conversion film is one of an EVA transparent film, a POE transparent film, and a PVB transparent film, and the thickness of the lower conversion film is 0.3 mm to 1 mm.

[0013] Preferably, the conventional adhesive film is one of EVA adhesive film, POE adhesive film or PVB adhesive film, and the thickness of the conventional adhesive film is 0.3 mm to 1 mm.

[0014] Preferably, the thickness of the lightweight backboard is 0.2 mm to 5 mm.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects:

[0016] The utility model provides a double-layer lightweight photovoltaic module with a PETG front plate. By providing the PETG front plate, the extruded PETG plate is generally 15 to 20 times tougher than general acrylic and 5 to 10 times tougher than impact-modified acrylic, thereby better protecting silicon solar cells. The water vapor barrier film is provided to block water vapor, thereby solving the problem in the prior art that water vapor penetrates through the front plate, corrodes the solar cells, and causes high power attenuation of the solar cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of a double-layer lightweight photovoltaic module with a PETG front plate according to the present invention;

[0019] In the figure: 1. PETG front plate; 2. Water vapor barrier film; 3. Lower conversion film; 4. Fiber support layer; 5. Battery cell; 6. Conventional film; 7. Lightweight back plate. DETAILED DESCRIPTION

[0020] It should be noted that, unless there is a conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0021] like Figure 1 As shown, the utility model provides a double-layer lightweight photovoltaic module with a PETG front plate, comprising a PETG front plate 1, a water vapor barrier film 2, a lower conversion film 3, a battery cell 5, a conventional film 6 and a lightweight back plate 7 arranged in sequence; the water vapor barrier film 2 is bonded to the PETG front plate 1, the water vapor barrier film 2 and the battery cell 5 are bonded via the lower conversion film 3, and the lightweight back plate 7 and the battery cell 5 are bonded via the conventional film 6; the PETG front plate 1, the water vapor barrier film 2 and the lower conversion film 3 are all transparent structures.

[0022] In a further optimized solution, a fiber support layer 4 is provided between the lower conversion film 3 and the battery cell 5 , and the fiber support layer 4 is provided inside the lower conversion film 3 .

[0023] According to a further optimization scheme, the thickness of the fiber support layer 4 is in the range of 100 μm to 800 μm, and the gram weight of the fiber support layer 4 is in the range of 100 g / ㎡ to 900 g / ㎡.

[0024] According to a further optimized solution, the thickness of the PETG front plate 1 is 0.2 mm to 5 mm.

[0025] According to a further optimized solution, the water vapor barrier film 2 is a polyolefin barrier film or a vapor-deposited barrier film, and the thickness of the water vapor barrier film 2 is 5 μm to 100 μm.

[0026] According to a further optimized solution, the lower conversion film 3 is one of an EVA transparent film, a POE transparent film, and a PVB transparent film, and the thickness of the lower conversion film 3 is 0.3 mm to 1 mm.

[0027] According to a further optimization scheme, the conventional adhesive film 6 is one of EVA adhesive film, POE adhesive film or PVB adhesive film, and the thickness of the conventional adhesive film 6 is 0.3 mm to 1 mm.

[0028] According to a further optimization scheme, the thickness of the lightweight backboard 7 is 0.2 mm to 5 mm.

[0029] The double-layer lightweight photovoltaic module with a PETG front plate provided by the utility model has a PETG front plate 1. The extruded plate of the PETG plate is generally 15 to 20 times tougher than general acrylic and 5 to 10 times tougher than impact-modified acrylic, which can better protect the silicon battery cell 5. In addition, the fiber support layer 4 can distribute the stress generated by the battery cell 5 when it is impacted through the glass fiber, thereby preventing the problem of hidden cracks and power attenuation of the battery cell 5. The water vapor barrier film 2 can block water vapor, thereby solving the problem in the prior art that water vapor penetrates through the front plate, corrodes the battery cell 5, and causes high power attenuation of the battery cell 5.

[0030] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A double-layer lightweight photovoltaic module with a PETG front plate, characterized in that: The invention comprises a PETG front plate (1), a water vapor barrier film (2), a lower conversion film (3), a battery cell (5), a conventional film (6) and a lightweight back plate (7) which are arranged in sequence; the water vapor barrier film (2) is bonded to the PETG front plate (1), the water vapor barrier film (2) and the battery cell (5) are bonded via the lower conversion film (3), and the lightweight back plate (7) and the battery cell (5) are bonded via the conventional film (6); the PETG front plate (1), the water vapor barrier film (2) and the lower conversion film (3) are all transparent structures.

2. The double-layer lightweight photovoltaic module with a PETG front plate according to claim 1, characterized in that: A fiber support layer (4) is provided between the lower conversion film (3) and the battery sheet (5), and the fiber support layer (4) is provided inside the lower conversion film (3).

3. The double-layer lightweight photovoltaic module with a PETG front plate according to claim 2, characterized in that: The thickness of the fiber support layer (4) ranges from 100 μm to 800 μm, and the gram weight of the fiber support layer (4) ranges from 100 g / ㎡ to 900 g / ㎡.

4. The double-layer lightweight photovoltaic module with a PETG front plate according to claim 1, characterized in that: The thickness of the PETG front plate (1) is 0.2 mm to 5 mm.

5. The double-layer lightweight photovoltaic module with a PETG front plate according to claim 1, characterized in that: The water vapor barrier film (2) is a polyolefin barrier film or a vapor deposition barrier film, and the thickness of the water vapor barrier film (2) is 5 μm to 100 μm.

6. The double-layer lightweight photovoltaic module with a PETG front plate according to claim 1, characterized in that: The lower conversion film (3) is one of an EVA transparent film, a POE transparent film, and a PVB transparent film, and the thickness of the lower conversion film (3) is 0.3 mm to 1 mm.

7. The double-layer lightweight photovoltaic module with a PETG front plate according to claim 1, characterized in that: The conventional adhesive film (6) is one of an EVA adhesive film, a POE adhesive film, and a PVB adhesive film, and the thickness of the conventional adhesive film (6) is 0.3 mm to 1 mm.

8. The double-layer lightweight photovoltaic module with a PETG front plate according to claim 1, characterized in that: The thickness of the lightweight backboard (7) is 0.2 mm to 5 mm.

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