Thermoplastic waterproof photovoltaic encapsulation adhesive film, preparation method thereof and photovoltaic module

Abstract

The present application belongs to the technical field of encapsulation adhesive film, and particularly relates to a thermoplastic waterproof photovoltaic encapsulation adhesive film, a preparation method thereof and a photovoltaic module, wherein the mass fractions of the components include: 100 parts of polyethylene; 0.5-5 parts of vinyl silane; 0.5-3 parts of high-TG vinyl monomer; and 0.1-0.3 parts of peroxide initiator; the TG of the high-TG vinyl monomer is greater than 50 DEG C; and the density of the polyethylene is greater than 0.89 g / cm 3 By using high-density polyethylene resin to replace POE resin, the water vapor transmission resistance is effectively improved; and the high-TG polyethylene mixed with high-density polyethylene resin can greatly improve the creep resistance of the adhesive film, thereby meeting the low-temperature lamination requirement of perovskite battery modules.

Description

Technical Field

[0001] This invention belongs to the field of encapsulation film technology, specifically relating to a thermoplastic waterproof photovoltaic encapsulation film, its preparation method, and photovoltaic modules. Background Technology

[0002] With the booming development of the photovoltaic industry, perovskite silicon solar cells have become the most promising battery technology. However, perovskite solar cells have two characteristics: they are sensitive to water and oxygen in the air, and the cell encapsulation lamination temperature needs to be ≤120℃. Slightly higher temperatures will damage the cells.

[0003] Existing encapsulating films are not suitable for the special environment of perovskite silicon solar cells, so there is an urgent need for a photovoltaic encapsulating film with better water-blocking properties. Summary of the Invention

[0004] This invention provides a thermoplastic waterproof photovoltaic encapsulating film, its preparation method, and a photovoltaic module, to solve the problem that existing encapsulating films are not suitable for the low-temperature lamination and high water resistance requirements of perovskite cells.

[0005] To address the aforementioned technical problems, this invention provides a thermoplastic waterproof photovoltaic encapsulating film, comprising the following components in parts by weight: 100 parts polyethylene; 0.5-5 parts vinyl silane; 0.5-3 parts high-TG vinyl monomer; and 0.1-0.3 parts peroxide initiator; wherein the high-TG vinyl monomer has a TG > 50°C; and the polyethylene has a density > 0.89 g / cm³. 3 .

[0006] In another aspect, the present invention also provides a method for preparing the thermoplastic waterproof photovoltaic encapsulating film as described above, comprising the following steps: step S1, uniformly mixing the components in proportion; step S2, extruding the film at 160°C using an extruder, grafting the mixture, and casting it to obtain the thermoplastic waterproof photovoltaic encapsulating film.

[0007] Thirdly, the present invention also provides a photovoltaic module, including a perovskite cell and a thermoplastic waterproof photovoltaic encapsulating film as described above.

[0008] The beneficial effects of this invention are that the thermoplastic waterproof photovoltaic encapsulating film and its preparation method, as well as the photovoltaic module, effectively improve the water vapor permeability resistance by replacing POE resin with high-density polyethylene resin; at the same time, the high-TG value polyethylene mixed with high-density polyethylene resin can significantly improve the creep resistance of the film, meeting the low-temperature lamination requirements of perovskite battery modules.

[0009] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0010] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] This invention provides a thermoplastic waterproof photovoltaic encapsulating film, comprising the following components in parts by weight: 100 parts polyethylene; 0.5-5 parts vinyl silane; 0.5-3 parts high-TG vinyl monomer; and 0.1-0.3 parts peroxide initiator; wherein the high-TG vinyl monomer has a TG > 50°C; and the polyethylene has a density > 0.89 g / cm³. 3 .

[0013] In this embodiment, specifically, the polyethylene includes any one or more combinations of Yanshan Petrochemical 1I40A and ExxonMobil LD 160AT.

[0014] In this embodiment, specifically, the vinyl silane includes any one or more combinations of vinyltrimethoxysilane, divinyldimethylsilane, divinyldiethylsilane, and 1,4-divinyl-1,1,4,4-tetramethyldimethylsilyl ethane.

[0015] In this embodiment, specifically, the high-TG vinyl monomer includes any one or a combination of isobornyl acrylate, isobornyl methacrylate, tetrahydrofuran methacrylate, and phenoxyethyl methacrylate.

[0016] In this embodiment, specifically, the peroxide initiator includes any one or more combinations of TBEC, TAEC, TCS, AIBN, BPO, and bis25.

[0017] In this embodiment, specifically, the water permeability of the thermoplastic waterproof photovoltaic encapsulation film is no higher than 1.6 g / m³. 2 .day.

[0018] In this embodiment, specifically, the thermal creep slip of the thermoplastic waterproof photovoltaic encapsulation film at 120°C for 2 hours is no more than 1.0 mm.

[0019] In another aspect, the present invention also provides a method for preparing the thermoplastic waterproof photovoltaic encapsulating film as described above, comprising the following steps: step S1, uniformly mixing the components in proportion; step S2, extruding the film at 160°C using an extruder, grafting the mixture, and casting it to obtain the thermoplastic waterproof photovoltaic encapsulating film.

[0020] Thirdly, the present invention also provides a photovoltaic module, including a perovskite cell and a thermoplastic waterproof photovoltaic encapsulating film as described above.

[0021] Example

[0022] Step S1: Mix the components of the water-blocking part evenly according to the ratio of polyethylene: 171: isobornyl acrylate: TBEC = 100: X: Y: 0.2;

[0023] Step S2: The water-blocking part and the EVA part are extruded at 160°C using an extruder, grafted, and cast to obtain a thermoplastic waterproof photovoltaic encapsulation film.

[0024] The water vapor transmission rate of the film and the DH1000 power decay, peel force, and thermal creep of the perovskite module were tested. The results are shown in Tables 1 and 2 below:

[0025] Table 1 Component ratios of Examples 1-14

[0026]

[0027]

[0028] Table 2 Performance Tests of Examples 1-14

[0029]

[0030] In this embodiment, specifically as shown in Examples 1 and 2, when the density of polyethylene is below 0.89 g / cm³ 3 At this time, both water vapor permeability and thermal creep performance will be significantly affected.

[0031] In this embodiment, specifically, the water vapor permeability of polyethylene decreases with increasing density, DH1000 has small power attenuation, the addition of silane can improve peel strength and slightly improve creep resistance, high TG vinyl monomer can improve creep resistance, and TG < 50℃ has no creep resistance effect.

[0032] In summary, the thermoplastic waterproof photovoltaic encapsulating film and its preparation method of the present invention, as well as the photovoltaic module, effectively improve the water vapor permeability resistance by replacing POE resin with high-density polyethylene resin; at the same time, the polyethylene mixed with high-density polyethylene resin containing high TG value can significantly improve the creep resistance of the film, meeting the low-temperature lamination requirements of perovskite battery modules.

[0033] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A thermoplastic waterproof photovoltaic encapsulating film, characterized in that, The mass fractions of each component include: 100 parts of polyethylene; Vinylsilane 0.5 to 5 parts; 0.5 to 3 parts of high-TG vinyl monomer; Peroxide initiator 0.1–0.3 parts; The polyethylene includes any one or more combinations of Yanshan Petrochemical 1I40A and ExxonMobil LD 160AT; The high-TG vinyl monomer includes any one or more combinations of isoborneol acrylate and isoborneol methacrylate. The water permeability of the thermoplastic waterproof photovoltaic encapsulation film is no higher than 1.6 g / m³. 2 .day; The thermoplastic waterproof photovoltaic encapsulation film exhibits a thermal creep slip of no more than 1.0 mm at 120°C for 2 hours.

2. The thermoplastic waterproof photovoltaic encapsulating film as described in claim 1, characterized in that, The vinyl silane includes any one or more combinations of vinyltrimethoxysilane, divinyldimethylsilane, divinyldiethylsilane, and 1,4-divinyl-1,1,4,4-tetramethyldimethylsilyl ethane.

3. The thermoplastic waterproof photovoltaic encapsulating film as described in claim 1, characterized in that, The peroxide initiator includes any one or more combinations of TBEC, TAEC, TCS, AIBN, BPO, and bis25.

4. A method for preparing a thermoplastic waterproof photovoltaic encapsulating film as described in any one of claims 1-3, characterized in that, The steps include the following: Step S1: Mix the components evenly according to the proportions; Step S2: The thermoplastic waterproof photovoltaic encapsulation film is obtained by extrusion at 160°C, grafting, and casting.

5. A photovoltaic module, characterized in that, Including perovskite solar cells and thermoplastic waterproof photovoltaic encapsulation films as described in any one of claims 1-3.

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