Flexible photovoltaic module suitable for marine environment

Abstract

The utility model discloses a flexible photovoltaic assembly suitable for a marine environment. The battery comprises a battery layer, an upper CPC material layer is bonded to the upper portion of the battery layer through a second packaging adhesive film layer, a polypropylene resin glass fiber composite material layer is bonded to the lower portion of the battery layer through a third packaging adhesive film layer, an ethylene-tetrafluoroethylene copolymer material layer is bonded to the upper portion of the upper CPC material layer through a first packaging adhesive film layer, and a polypropylene resin glass fiber composite material layer is bonded to the lower portion of the battery layer through a second packaging adhesive film layer. A lower CPC material layer is adhered to the lower portion of the polypropylene resin glass fiber composite material layer through a fourth packaging adhesive film layer, the upper portion of the ethylene-tetrafluoroethylene copolymer material layer is coated with an upper organic silicon anti-corrosion elastic coating, and the lower portion of the lower CPC material layer is coated with a lower organic silicon anti-corrosion elastic coating. The advantages are that a multi-layer packaging design (four layers of packaging materials and four layers of packaging adhesive films) forms a high-strength composite structure, and the overall impact resistance, corrosion resistance and sealing performance of the assembly are further improved, so that the assembly is more suitable for a complex marine environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of photovoltaic modules, specifically to a kind of flexible photovoltaic module suitable for marine environment. BACKGROUND

[0002] As a new clean energy development mode, offshore photovoltaic power generation uses photovoltaic technology to establish power station in marine environment, with the advantages of high power generation efficiency, less land occupation and high resource utilization rate. In recent years, with the increasing policy support of coastal areas (such as Shandong, Zhejiang and Tianjin), offshore photovoltaic power generation technology has gradually matured, and its application is mainly concentrated in large-scale photovoltaic power stations and auxiliary power supply of some large ships. However, the complex marine environment puts higher requirements on the performance of photovoltaic modules, including the reliability challenges in terms of water vapor erosion resistance, surface corrosion resistance and wind and wave deformation resistance.

[0003] Most of the existing marine photovoltaic modules adopt double-glass structure to improve the durability of the modules by increasing material strength and sealing performance. However, this type of module has certain limitations: on the one hand, it is relatively rigid and difficult to adapt to complex curved or uneven installation scenarios; on the other hand, the double-glass structure module is heavy, with high installation and transportation costs, limiting its promotion in small floating bodies or portable applications. In addition, the existing modules still have deficiencies in long-term resistance to high salinity and high ultraviolet environments, and are prone to performance degradation due to coating aging or material corrosion. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a flexible photovoltaic module with excellent corrosion resistance and suitable for marine environment.

[0005] To solve the above technical problems, the flexible photovoltaic module suitable for marine environment of the utility model comprises a cell layer, an upper CPC material layer is bonded to the upper side of the cell layer through a second encapsulation adhesive film layer, a polypropylene resin glass fiber composite material layer is bonded to the lower side of the cell layer through a third encapsulation adhesive film layer, an ethylene-tetrafluoroethylene copolymer material layer is bonded to the upper side of the upper CPC material layer through a first encapsulation adhesive film layer, a lower CPC material layer is bonded to the lower side of the polypropylene resin glass fiber composite material layer through a fourth encapsulation adhesive film layer, an upper organic silicon corrosion-resistant elastic coating is coated on the upper side of the ethylene-tetrafluoroethylene copolymer material layer, and a lower organic silicon corrosion-resistant elastic coating is coated on the lower side of the lower CPC material layer.

[0006] The first encapsulation adhesive film layer, the second encapsulation adhesive film layer, the third encapsulation adhesive film layer and the fourth encapsulation adhesive film layer are all selected from polyolefin elastomer adhesive film.

[0007] The cell layer is composed of cell pieces made by cutting and scribing process.

[0008] The upper coating layer and the lower coating layer have a coating thickness of 100-500 microns.

[0009] The upper silicone anticorrosion elastic coating layer, the ethylene-tetrafluoroethylene copolymer material layer, the first encapsulation adhesive film layer, the upper CPC material layer, the second encapsulation adhesive film layer, the battery layer, the third encapsulation adhesive film layer, the polypropylene resin glass fiber composite material layer, the fourth encapsulation adhesive film layer, the lower CPC material layer and the lower silicone anticorrosion elastic coating layer are sequentially stacked to form a flexible photovoltaic module body, and a frame is arranged at the peripheral edge of the flexible photovoltaic module body.

[0010] The frame is made of a metal material.

[0011] The frame is made of a composite material.

[0012] The utility model has the advantages of:

[0013] (1) The upper silicone anticorrosion elastic coating layer and the lower silicone anticorrosion elastic coating layer arranged on the upper and lower surfaces of the flexible photovoltaic module body are transparent coating layers with linear polysiloxane as film forming substances, can effectively isolate materials and corrosive media, and have excellent weather resistance, high and low temperature resistance, light transmittance, excellent elasticity and ductility.

[0014] (2) The ethylene-tetrafluoroethylene copolymer material layer is arranged between the upper CPC material layer and the upper silicone anticorrosion elastic coating layer, can not only further improve the corrosion resistance by utilizing the excellent chemical stability and corrosion resistance of the ethylene-tetrafluoroethylene copolymer material, but also can utilize the unique adhesion of the ethylene-tetrafluoroethylene copolymer material to the upper CPC material layer and the upper silicone anticorrosion elastic coating layer to improve the stability and further improve the weather resistance of the photovoltaic module.

[0015] (3) The polypropylene resin glass fiber composite material layer is directly bonded below the battery layer, thereby utilizing the rigid characteristics of the PP (polypropylene) resin glass fiber composite material to enhance the structural support of the battery layer, effectively protecting the battery sheet and improving the structural strength of the entire photovoltaic module, thereby improving the wind and wave impact resistance of the photovoltaic module.

[0016] (4) The upper CPC material layer directly covers the upper surface of the battery sheet as a front plate, utilizes the waterproof performance characteristics to effectively protect the battery sheet, and the lower CPC material layer is arranged between the polypropylene resin glass fiber composite material layer and the lower silicone anticorrosion elastic coating layer as a back plate, improves the water vapor permeability, and through the combination of the upper and lower CPC material layers, the module has extremely high water resistance, weather resistance and ultraviolet radiation resistance on both sides, and is suitable for high-salt fog and strong ultraviolet marine environments.

[0017] (5) The battery layer is made of battery pieces by cutting and scribing process, which ensures smooth section of the battery pieces without cracks, greatly improves the bending strength of the battery, and effectively enhances the mechanical reliability and service life of the photovoltaic module in the marine environment.

[0018] (6) The multi-layer packaging design (four layers of packaging material and four layers of packaging film) forms a high-strength composite structure, further improves the overall impact resistance, corrosion resistance and sealing of the module, and makes it more suitable for complex marine environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model is suitable for the structure diagram of the flexible photovoltaic module in marine environment. DETAILED DESCRIPTION

[0020] The flexible photovoltaic module in marine environment of the utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0021] The flexible photovoltaic module in marine environment of the embodiment comprises a battery layer 1, an upper CPC material layer 3 is bonded to the battery layer 1 through a second packaging adhesive film layer 2, a polypropylene resin glass fiber composite material layer 7 is bonded to the battery layer 1 through a third packaging adhesive film layer 6, an ethylene-tetrafluoroethylene copolymer material layer 5 is bonded to the upper CPC material layer 3 through a first packaging adhesive film layer 4, a lower CPC material layer 9 is bonded to the polypropylene resin glass fiber composite material layer 7 through a fourth packaging adhesive film layer 8, an upper organic silicon corrosion-resistant elastic coating 10 is coated on the upper CPC material layer 3, and a lower organic silicon corrosion-resistant elastic coating 11 is coated on the lower CPC material layer 9.

[0022] The material of the ethylene-tetrafluoroethylene copolymer material layer 5 is ethylene-tetrafluoroethylene copolymer (ETFE), which has excellent chemical stability and corrosion resistance, and also has good adhesion, further improving the weather resistance of the photovoltaic module; the upper CPC material layer 3 is made of CPC material, which is a composite material with polycarbonate as the base material and fluorocarbon coating on the surface, and the upper CPC material layer 3 uses polycarbonate as the base material and as the front plate, which has excellent weather resistance, ultraviolet radiation resistance and adhesion, ensuring the weather resistance and water resistance of the front of the photovoltaic module; the polypropylene resin glass fiber composite material layer 7 is made of PP (polypropylene) resin glass fiber composite material, which improves the rigidity of the entire photovoltaic module, thereby improving the wind and wave impact resistance of the photovoltaic module; the lower CPC material layer 9 uses high water resistance white CPC as the back plate, ensuring the weather resistance and water resistance of the back of the photovoltaic module.

[0023] Especially, the upper and lower organic silicon corrosion-resistant elastic coatings arranged on the upper and lower surfaces of the flexible photovoltaic module body can be removed to expose the substrate after the upper and lower organic silicon corrosion-resistant elastic coatings 10 and 11 on the surface of the photovoltaic module are delaminated or marine organisms are attached, and the coating in the area can be cleaned until the substrate is exposed. After the substrate is cleaned, dried, free of pollutants and free of burrs, on-site recoating and repair can be performed. Since there is no interface reaction in the material itself, the repaired part is integrated with the original coating, and peeling and delamination do not occur.

[0024] Further, the battery layer is composed of battery pieces, the battery pieces are cut by a lossless cutting and slicing process, the cross section is smooth and free of cracks, the bending strength of the battery is improved, and the mechanical properties of the solar module are ensured.

[0025] Further, the first encapsulating adhesive film layer 4, the second encapsulating adhesive film layer 2, the third encapsulating adhesive film layer 6 and the fourth encapsulating adhesive film layer 8 are all POE (polyolefin elastomer) adhesive films. The POE adhesive film is superior to the EVA (ethylene-vinyl acetate copolymer) adhesive film in volume resistivity, water vapor transmission rate and anti-ultraviolet and moisture yellowing performance. The water vapor transmission rate of the POE adhesive film is one-tenth of that of the EVA material, which can further improve the water vapor permeation resistance of the module.

[0026] Further, the upper organic silicon corrosion-resistant elastic coating 10, the ethylene-tetrafluoroethylene copolymer material layer 5, the first encapsulating adhesive film layer 4, the upper CPC material layer 3, the second encapsulating adhesive film layer 2, the battery layer 1, the third encapsulating adhesive film layer 6, the polypropylene resin glass fiber composite material layer 7, the fourth encapsulating adhesive film layer 8, the lower CPC material layer 9 and the lower organic silicon corrosion-resistant elastic coating 11 are sequentially stacked to form a flexible photovoltaic module body, and a frame is arranged on the periphery edge of the flexible photovoltaic module body. The frame is fixedly connected with the material layer by mechanical clamping or bonding to form a closed protection structure. The frame can be made of metal or composite material. The composite material has better corrosion resistance and weather resistance than the metal material.

[0027] Different requirements for corrosion resistance have different requirements for coating thickness. The following atmospheric environment classification is divided according to ISO 9223-2012:

[0028] For atmospheric environments of C1 and C2 levels, the coating thickness is recommended to be greater than 0.1 mm;

[0029] For atmospheric environments of C3 level, the coating thickness is recommended to be greater than 0.15 mm;

[0030] For atmospheric environments of C4 and C5 levels, the coating thickness is recommended to be greater than 0.2 mm;

[0031] For atmospheric environments of CX level, the coating thickness is recommended to be greater than 0.3 mm.

[0032] The estimated dosage control table is as follows:

[0033]

Claims

1. A flexible photovoltaic module suitable for marine environments, characterized in that: The battery layer (1) is attached to the top of the battery layer (1) by a second encapsulation film layer (2) and a polypropylene resin glass fiber composite material layer (7) is attached to the bottom of the battery layer (1) by a third encapsulation film layer (6). An ethylene-tetrafluoroethylene copolymer material layer (5) is bonded above the upper CPC material layer (3) via a first encapsulating film layer (4), and a lower CPC material layer (9) is bonded below the polypropylene resin glass fiber composite material layer (7) via a fourth encapsulating film layer (8). An upper silicone anti-corrosion elastic coating (10) is applied above the ethylene-tetrafluoroethylene copolymer material layer (5), and a lower silicone anti-corrosion elastic coating (11) is applied below the lower CPC material layer (9).

2. The flexible photovoltaic module suitable for marine environments according to claim 1, characterized in that: The first encapsulation film layer (4), the second encapsulation film layer (2), the third encapsulation film layer (6) and the fourth encapsulation film layer (8) are all made of polyolefin elastomer film.

3. The flexible photovoltaic module suitable for marine environments according to claim 2, characterized in that: The battery layer (1) is composed of battery cells made using a dicing process.

4. The flexible photovoltaic module suitable for marine environments according to claim 3, characterized in that: The coating thickness of the upper silicone anti-corrosion elastic coating (10) and the lower silicone anti-corrosion elastic coating (11) is between 100μm and 500μm.

5. The flexible photovoltaic module suitable for marine environments according to claim 4, characterized in that: The upper silicone anti-corrosion elastic coating (10), ethylene-tetrafluoroethylene copolymer material layer (5), first encapsulation film layer (4), upper CPC material layer (3), second encapsulation film layer (2), battery layer (1), third encapsulation film layer (6), polypropylene resin glass fiber composite material layer (7), fourth encapsulation film layer (8), lower CPC material layer (9) and lower silicone anti-corrosion elastic coating (11) are stacked in sequence to form the flexible photovoltaic module body, and a frame is provided on the outer edge of the flexible photovoltaic module body.

6. The flexible photovoltaic module suitable for marine environments according to claim 5, characterized in that: The frame is made of metal.

7. The flexible photovoltaic module suitable for marine environments according to claim 5, characterized in that: The frame is made of composite material.

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