WO2015010503A1 - 太阳能电池背板及其制备方法和太阳能电池组件 - Google Patents
太阳能电池背板及其制备方法和太阳能电池组件 Download PDFInfo
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- WO2015010503A1 WO2015010503A1 PCT/CN2014/079104 CN2014079104W WO2015010503A1 WO 2015010503 A1 WO2015010503 A1 WO 2015010503A1 CN 2014079104 W CN2014079104 W CN 2014079104W WO 2015010503 A1 WO2015010503 A1 WO 2015010503A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
- H10F19/85—Protective back sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/712—Weather resistant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7246—Water vapor barrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/12—Photovoltaic modules
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Definitions
- the invention belongs to the field of solar cells, and in particular relates to a solar cell backsheet, a preparation method thereof and a solar cell module.
- a solar cell is a device that directly converts light energy into electrical energy through a photoelectric effect.
- the solar cell module is directly exposed to the atmosphere during use and is subject to temperature changes, ultraviolet radiation, and moisture.
- the solar cell backsheet which is a main component of a solar cell, is required to have weather resistance and to effectively block ultraviolet rays and moisture.
- the existing solar cell backsheet is usually made of TPT material, which is a bonding heat of glue through a three-layer film of polyvinyl fluoride/polyethylene terephthalate/polyvinyl fluoride (PVF/PET/PVT). Compression molding.
- Another type of solar cell backsheet is coated with a liquid solvent-based coating on both sides of the PET, which is cured to form a backsheet.
- the TPT backsheet material is costly and the coating has a low emissivity to light. PET coated backsheet with low cure temperature and poor weatherability.
- the invention solves the technical problem of poor weather resistance of the existing solar battery back sheet, and provides a solar battery back sheet with good weather resistance, a preparation method thereof and a solar battery module.
- the present invention provides a solar cell backsheet, the solar cell backsheet comprising a PET film layer; a first weathering layer, the first weathering layer is formed on an upper surface of the PET film layer; and a second weathering layer, The second weather resistant layer is formed on a lower surface of the PET film layer, wherein at least one of the first weather resistant layer and the second weather resistant layer is formed of a poly-m-phenylene resin material.
- the present invention also provides a method for preparing a solar cell back sheet, the method comprising the steps of: forming a first weathering layer on an upper surface of the PET film; and forming a second weathering layer on a lower surface of the PET film to obtain the solar energy a battery back sheet; wherein at least one of the first weather resistant layer and the second weather resistant layer is formed of a poly-m-phenylene resin material.
- the invention adopts a poly-m-phenylene resin material as a weather-resistant layer of the back sheet, and the poly-m-benzene-based resin material avoids the repulsiveness of the poly-o-benzene carbon atoms to be too close, and overcomes that the poly-p-benzene carbon atoms are too far apart from each other.
- the problem of interference affecting the weather resistance of the material improves the weather resistance of the backboard.
- FIG. 1 is a schematic view of a solar cell backsheet in accordance with an embodiment of the present invention. detailed description
- the solar cell backsheet includes a PET film layer 100; a first weathering layer 200, a first weathering layer 200 is formed on an upper surface of the PET film layer 100; and a second weathering layer 300, a second weathering layer 300 is formed on the lower surface of the PET film layer 100, wherein at least one of the first weather resistant layer 200 and the second weather resistant layer 300 is formed of a poly-m-phenylene resin material.
- the solar battery back sheet provided by the invention does not need an adhesive between layers, only needs three layers structure, and changes the structure of the traditional back sheet 5 layer, is simple to process and is not easy to delamination, and can satisfy the solar battery back sheet. Requirements for use.
- the first weathering layer 200 and the second weathering layer 300 is formed by applying a powder type coating on the surface of the PET film layer 100.
- the powder type coating material comprises a poly-m-phenylene resin material, a curing crosslinking agent, an anti-aging agent, a leveling agent, and a rutile type titanium dioxide.
- the curing crosslinking agent is benzyltriethylammonium chloride; the anti-aging agent is an o-hydroxybenzophenone compound; the leveling agent is an acrylate copolymer, and the specific model is BYK-VP-3609 Rutile titanium dioxide is rutile titanium dioxide.
- the first weathering layer 200 and the second weathering layer 300 are obtained by electrostatically spraying a powder coating.
- Electrostatic spray powder type coatings save cost, higher curing temperature and higher weather resistance than existing liquid solvent-based coatings. And improve the solar reflectance. Rutile titanium dioxide can effectively improve the light reflectivity of the back coating, thereby effectively increasing the output power of the solar module.
- the content of the poly-m-phenylene resin is 50-70% by weight based on the total weight of the powder type coating material,
- the content of the curing crosslinking agent is 6-10% by weight, the content of the antioxidant is 1-2% by weight, the content of the leveling agent is 10-15% by weight, and the rutile type titanium dioxide The content is 10-20% by weight.
- the poly-m-phenylene resin may be various poly-m-phenylene resins commonly used in the art.
- the poly-m-phenylene resin is a polyphthalate diene. Propyl ester.
- the polyallyl diallyl has a molecular weight of 2 ⁇ 10 4 -13 ⁇ 10 4 . More preferably, the polyallyl diallyl has a molecular weight of 6 ⁇ 10 4 -9 ⁇ 10 4 .
- the PET film has a water vapor transmission rate of less than 2.0 g/m 2 -24 h, and the film layer is a non-transparent film layer, and the whiteness is 94%.
- the thickness of the PET film layer 100 is 250-350 ⁇ m
- the thickness of the first weather-resistant layer 200 is 60-80 ⁇ m
- the thickness of the second weather-resistant layer 300 is 25- 35 ⁇ .
- the invention also provides a method for preparing a solar battery backboard, the method comprising the following steps: Forming a first weathering layer on an upper surface of the PET film;
- At least one of the first weather resistant layer and the second weather resistant layer is formed of a poly-m-phenylene resin material.
- forming the first weather-resistant layer on an upper surface of the PET film comprises electrostatically spraying a powder-type coating on an upper surface of the PET film, and forming the second weather-resistant layer on a lower surface of the PET film in the PET film
- the lower surface electrostatic spray powder type coating; the powder type coating material comprises a poly-m-phenyl resin material, a curing crosslinking agent, an anti-aging agent, a leveling agent, and a rutile type titanium dioxide.
- the curing crosslinking agent is benzyltriethylammonium chloride; the anti-aging agent is an o-hydroxybenzophenone compound; the leveling agent is an acrylate copolymer, and the specific model is BYK-VP-3609 Rutile titanium dioxide is rutile titanium dioxide.
- a charged substrate is bonded to the opposite surface of the surface of the electrostatically sprayed PET film, and the substrate is grounded; and the electrostatic spray gun is an electrostatic spray gun.
- the electrostatic spray gun generates an electric field between the charged substrate and the charged substrate. Under the action of the electric field, the powder coating moves to the surface of the PET film and is finally deposited on the surface of the PET film.
- the electrostatic spray gun has a voltage of 90-100 kV, a current of 15-30 microamperes, and a distance between the electrostatic spray gun and the PET film of 100-200 mm.
- the spraying time in order to obtain a thickness of the first weather-resistant layer of 60-80 ⁇ m, and a thickness of the second weather-resistant layer of 25-35 ⁇ m, electrostatic spraying on the upper surface of the PET film.
- the powder type coating comprises spraying the powder type coating for 45-55 seconds, and electrostatically spraying the powder type coating on a lower surface of the PET film comprises spraying the powder type coating for 15-25 seconds.
- forming the first weathering layer on the upper surface of the PET film further comprises curing the sprayed powder type coating at a temperature of 200-210 ° C for 8-10 minutes.
- Forming the second weathering layer on the lower surface of the PET film further comprises curing the sprayed powder type coating at a temperature of 180 to 19 CTC for 15 to 20 minutes.
- the content of the poly-m-phenylene resin is 50-70% by weight, and the content of the curing cross-linking agent is 6-based on the total weight of the powder type coating material.
- the poly-m-phenylene resin may be various poly-m-phenylene resins commonly used in the art.
- the poly-m-phenylene resin is diallyl polyisophthalate.
- the polyallyl diallyl has a molecular weight of 2 ⁇ 10 4 -13 ⁇ 10 4 . More preferably, the polyallyl diallyl has a molecular weight of 6 ⁇ 10 4 -9 ⁇ 10 4 .
- the water vapor transmission rate of the PET film is less than 2.0 g/m 2 '24h
- the film layer is a non-transparent film layer
- the whiteness is 94%.
- the PET film layer has a thickness of 250-350 ⁇ m
- the first weather-resistant layer has a thickness of 60-80 ⁇ m
- the thickness of the second weather-resistant layer It is 25-35 ⁇ .
- the present invention also provides a solar cell module comprising a back sheet, a sealant layer, a cell sheet, a sealant layer and a cover plate which are sequentially laminated, the back sheet being the solar battery back of the present invention board.
- the solar cell back sheet of the present invention has excellent weather resistance and high solar reflectance.
- diallyl polyphthalate (molecular weight 6 ⁇ 10 4 ) is 65% by weight, the content of curing crosslinking agent is 11% by weight, the content of anti-aging agent is 2% by weight, and the content of leveling agent is 12. % by weight, rutile type titanium dioxide content is 10% by weight; the production process is: 1 pre-mixing; 2 melt extrusion; 3 tableting; 4 pulverization;
- the surface of the PET film (transmission rate of 1.0g / m 2 24h, thickness of 250 ⁇ ) on the surface of the electrostatic spray powder coating (electrostatic spray gun voltage is 90kv, current is 20 microamperes, electrostatic spray gun and PET film
- electrostatic spray gun voltage is 90kv
- current is 20 microamperes
- electrostatic spray gun and PET film The distance between the two is 200mm and the spraying time is 45 seconds. It is transferred to a special curing equipment for curing.
- the curing condition is 200 ° C for 10 minutes. After curing, a first weathering layer with a thickness of 60 ⁇ m is obtained.
- the powder coating on the other side of the PET is sprayed (the spraying time is 25 seconds), and the curing is carried out in a special curing device, and the curing condition is 190 ° C, 20 minutes.
- a second weathering layer having a thickness of 35 ⁇ m was obtained.
- the solar cell backsheet Al is obtained by cooling.
- a solar cell back sheet 2 was prepared in accordance with the method of Example 1. The difference is: polydiallyl isophthalate (molecular weight 9 ⁇ 10 4 ) content of 60% by weight, curing crosslinker content of 10% by weight, anti-aging agent content of 2% by weight, leveling agent The content was 13% by weight, and the content of the rutile-type titanium white powder was 15% by weight.
- polydiallyl isophthalate molecular weight 9 ⁇ 10 4
- a solar cell back sheet A3 was prepared in accordance with the method of Example 1. The difference is: the content of diallyl polyphthalate (molecular weight 2 ⁇ 10 4 ) is 55% by weight, the content of curing crosslinking agent is 9% by weight, the content of anti-aging agent is 1% by weight, and the leveling agent The content was 15% by weight, and the content of the rutile-type titanium white powder was 20% by weight.
- the first weathering layer has a spraying time of 55 seconds and a thickness of 80 ⁇ m, and the second weathering layer has a spraying time of 15 seconds and a thickness of 25 ⁇ m.
- a solar cell back sheet A4 was prepared in accordance with the method of Example 1. The difference is: polydiallyl isophthalate (molecular weight 13 ⁇ 10 4 ) content of 70% by weight, curing crosslinker content of 6% by weight, anti-aging agent content of 2% by weight, leveling agent The content was 10% by weight, and the content of the rutile-type titanium white powder was 12% by weight.
- the first weathering layer has a spraying time of 50 seconds and a thickness of 70 ⁇ m, and the second weathering layer has a spraying time of 20 seconds and a thickness of 30 ⁇ m. Comparative example 1
- a liquid solvent coating is applied on the PET surface in a clean room environment.
- the liquid solvent coating has a main resin of PVDF, a content of 32% by weight, a titanium white content of 26% by weight, a crosslinking agent content of 6.5% by weight, a solvent.
- the content of butyl acetate was 35.5 wt%
- the thickness of the wet film was 80 ⁇ m, and it was allowed to stand for 10 minutes, and it was transferred to a special curing device for curing, and the curing condition was 80 ° C for 40 minutes.
- the 80 ⁇ m wet film thickness liquid solvent coating was electrostatically sprayed on the other side of the PET under the same environment. The mixture was also allowed to stand for 10 minutes, and then transferred to a special curing device for curing at 80 ° C for 40 minutes. Cooling, get the solar cell backplane CA1.
- the light reflectance test method is: Sample size: 50mm*50mm; Quantity of each 3p CS; Test equipment: Spectrophotometer Lambda 950; Test the light reflectivity of the sample surface (EVA surface), each test is set to 3 tests Point, 3 points into an equilateral triangle; the test wavelength range is 400-700nm, and it is tested once every 10 wavelength ranges, and the average value is taken. The results are shown in Table 1.
- the light reflectance of the solar cell back sheet of the present invention is higher than that of the back sheet of the solar cell of the comparative example, indicating that the solar cell back sheet of the present invention has high light reflectance.
- the color difference Ab of the solar cell backsheet of the present invention is less than 0.41, which is much smaller than the color difference of the solar cell of the comparative example of 1.48, indicating that the solar cell backsheet of the present invention has good ultraviolet aging resistance.
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Abstract
本发明提供了一种太阳能电池背板,所述太阳能电池背板包括PET膜层(100);第一耐候层(200),第一耐候层(200)形成于PET膜层(100)的上表面;以及第二耐候层(300),第二耐候层(300)形成于PET膜层(100)的下表面,其中,第一耐候层(200)和第二耐候层(300)的至少之一是由聚间苯类树脂材料形成的。本发明还提供了该太阳能电池背板的制备方法和含有该太阳能电池背板的太阳能电池组件。
Description
太阳能电池背板及其制备方法和太阳能电池组件
技术领域
本发明属于太阳能电池领域,尤其涉及一种太阳能电池背板及其制备方法和太阳能电池 组件。
背景技术
太阳能电池是通过光电效应直接把光能转化成电能的装置。太阳能电池组件在使用时直 接暴露于大气中, 要经受温度变化、 紫外线照射及水汽的侵蚀。 作为太阳能电池主要部件的 太阳能电池背板, 要具有耐候性、 并有效阻隔紫外线和水汽的性能。现有的太阳能电池背板 通常采用 TPT材料, 它是以聚氟乙烯 /聚对苯二甲酸乙二醇酯 /聚氟乙烯(PVF/PET/PVT)三 层独立的薄膜通过胶水的粘结热压成型。 另一种太阳能电池背板是在 PET两侧各涂覆液体 溶剂型涂料, 经固化后形成背板。 TPT背板材料成本高, 涂层对光线发射率较低。 PET涂覆 型背板, 固化温度较低, 耐候性能差。
发明内容
本发明为解决现有的太阳能电池背板的耐候性能差的技术问题,提供一种耐候性能好的 太阳能电池背板及其制备方法和太阳能电池组件。
本发明提供了一种太阳能电池背板, 所述太阳能电池背板包括 PET膜层; 第一耐候层, 所述第一耐候层形成于所述 PET膜层的上表面; 以及第二耐候层, 所述第二耐候层形成于 所述 PET膜层的下表面, 其中, 所述第一耐候层和所述第二耐候层的至少之一是由聚间苯 类树脂材料形成的。
本发明还提供了一种太阳能电池背板的制备方法, 该方法包括如下步骤: 在 PET膜的 上表面形成第一耐候层; 以及在 PET膜的下表面形成第二耐候层, 得到所述太阳能电池背 板; 其中, 所述第一耐候层和所述第二耐候层的至少之一是由聚间苯类树脂材料形成的。
本发明采用聚间苯类树脂材料作为背板的耐候层,聚间苯类树脂材料即避免了聚邻苯碳 原子距离太近而排斥,又克服了聚对苯碳原子相隔太远而互不干扰而影响材料耐候性能的问 题, 提高了背板的耐候性。
附图说明
图 1是根据本发明实施例的太阳能电池背板的示意图。
具体实施方式
为了使本发明所解决的技术问题、技术方案及有益效果更加清楚明白,以下结合实施例, 对本发明进行进一步详细说明。 应当理解, 此处所描述的具体实施例仅仅用以解释本发明, 并不用于限定本发明。
本发明提供了一种太阳能电池背板。 如图 1所示, 所述太阳能电池背板包括 PET膜层 100;第一耐候层 200,第一耐候层 200形成于 PET膜层 100的上表面;以及第二耐候层 300, 第二耐候层 300形成于 PET膜层 100的下表面, 其中, 第一耐候层 200和第二耐候层 300 的至少之一是由聚间苯类树脂材料形成的。
本发明所提供的太阳能电池背板, 层与层之间不需要粘合剂, 仅需三层结构, 改变了传 统背板 5层的结构, 加工简单不易脱层, 且能满足太阳能电池背板的使用要求。
在一些实施例中,第一耐候层 200和第二耐候层 300的至少之一是通过在 PET膜层 100 的表面施加粉末型涂料而形成的。 所述粉末型涂料包括聚间苯类树脂材料、 固化交联剂、 抗 老剂、 流平剂和金红石型钛白粉。 在一些实施例中, 固化交联剂为苄基三乙基氯化铵; 抗老 剂为邻羟基二苯甲酮类化合物; 流平剂为丙烯酸酯共聚物, 具体型号为 BYK-VP-3609; 金 红石型钛白粉为金红石型二氧化钛。在一个实施例中, 第一耐候层 200和第二耐候层 300是 粉末型涂料经静电喷涂得到的。 静电喷涂粉末型涂料, 相对于现有的涂覆液体溶剂型涂料, 节约了成本, 固化温度高, 耐候性能更高。 并提高了太阳光反射率。 金红石型钛白粉, 可有 效提高背板涂层的光反射率, 从而有效提高太阳能电池组件的输出功率。
根据本发明所提供的太阳能电池背板, 为了使背板的耐候性更好, 优选地, 基于所述粉 末型涂料的总重量,所述聚间苯类树脂的含量为 50-70重量%,所述固化交联剂的含量为 6-10 重量%, 所述抗老剂的含量为 1-2重量%, 所述流平剂的含量为 10-15重量%, 所述金红石型 钛白粉的含量为 10-20重量%。
本发明所提供的太阳能电池背板,所述聚间苯类树脂可以为本领域常用的各种聚间苯类 树脂, 本发明中, 所述聚间苯类树脂为聚间苯二甲酸二烯丙酯。
为了更好的提高太阳能电池背板的耐候性, 优选地, 所述聚间苯二甲酸二烯丙酯的分子 量为 2χ 104-13 χ 104。 更优选地, 所述聚间苯二甲酸二烯丙酯的分子量为 6χ 104-9χ 104。
为了进一步提高太阳能电池背板的性能, 优选地, 所述 PET 膜的水汽透过率小于 2.0g/m2-24h, 其膜层为非透明膜层, 白度为 94%。
为了更好的提高太阳能电池背板的耐候性,优选地, PET膜层 100的厚度为 250-350μιη, 第一耐候层 200的厚度为 60-80 μιη, 第二耐候层 300的厚度为 25-35 μιη。
本发明还提供了一种太阳能电池背板的制备方法, 该方法包括如下步骤:
在 PET膜的上表面形成第一耐候层; 以及
在 PET膜的下表面形成第二耐候层, 得到所述太阳能电池背板;
其中,
所述第一耐候层和所述第二耐候层的至少之一是由聚间苯类树脂材料形成的。
优选地, 在所述 PET膜的上表面形成所述第一耐候层包括在 PET膜的上表面静电喷涂 粉末型涂料, 在所述 PET膜的下表面形成所述第二耐候层包括在 PET膜的下表面静电喷涂 粉末型涂料; 所述粉末型涂料包括聚间苯类树脂材料、 固化交联剂、 抗老剂、 流平剂和金红 石型钛白粉。在一些实施例中, 固化交联剂为苄基三乙基氯化铵; 抗老剂为邻羟基二苯甲酮 类化合物; 流平剂为丙烯酸酯共聚物, 具体型号为 BYK-VP-3609; 金红石型钛白粉为金红 石型二氧化钛。
优选地, 在进行静电喷涂时, 在静电喷涂的 PET膜的表面的相对面上贴合有带电的基 板, 所述基板接地; 所述静电喷涂用喷枪为静电喷枪。 静电喷枪电, 与带电的基板之间形成 电场, 在电场的作用下, 粉末型涂料会向 PET膜表面运动, 最后沉积在 PET膜表面。
在本发明中, 所述静电喷枪的电压为 90-100kv, 电流为 15-30微安, 静电喷枪与 PET 膜之间的距离为 100-200mm。
本发明中, 对喷涂的时间没有限制, 为了能得到第一耐候层的厚度为 60-80 μιη, 第二耐 候层的厚度为 25-35 μιη即可, 在所述 PET膜的上表面静电喷涂所述粉末型涂料包括将所述 粉末型涂料喷涂 45-55秒,在所述 PET膜的下表面静电喷涂所述粉末型涂料包括将所述粉末 型涂料喷涂 15-25秒。
为了更好的得到耐候层, 优选地, 在所述 PET膜的上表面形成所述第一耐候层进一步 包括将喷涂后的粉末型涂料在 200-210°C的温度条件下固化 8-10分钟。 在所述 PET膜的下 表面形成所述第二耐候层进一步包括将喷涂后的粉末型涂料在 180-19CTC的温度条件下固化 15-20分钟。
为了使背板的耐候性更好, 优选地, 基于所述粉末型涂料的总重量, 所述聚间苯类树脂 的含量为 50-70重量%, 所述固化交联剂的含量为 6-10重量%, 所述抗老剂的含量为 1-2重 量%, 所述流平剂的含量为 10-15重量%, 所述金红石型钛白粉的含量为 10-20重量%。
所述聚间苯类树脂可以为本领域常用的各种聚间苯类树脂, 本发明中, 所述聚间苯类树 脂为聚间苯二甲酸二烯丙酯。
为了更好的提高太阳能电池背板的耐候性, 优选地, 所述聚间苯二甲酸二烯丙酯的分子 量为 2χ 104-13 χ 104。 更优选地, 所述聚间苯二甲酸二烯丙酯的分子量为 6χ 104 -9χ 104。
为了进一步提高太阳能电池背板的性能, 优选地, 所述 PET 膜的水汽透过率小于
2.0g/m2'24h, 其膜层为非透明膜层, 白度为 94%。
为了更好的提高太阳能电池背板的耐候性,优选地,所述 PET膜层的厚度为 250-350μιη, 所述第一耐候层的厚度为 60-80 μιη, 所述第二耐候层的厚度为 25-35 μιη。
本发明还提供了一种太阳能电池组件, 所述太阳能电池组件包括依次层叠的背板、密封 胶层、 电池片、 密封胶层和盖板, 所述背板为本发明所述的太阳能电池背板。
本发明的太阳能电池背板, 具有很好的耐候性并且太阳光反射率高。
下面通过具体实施例对本发明进行详细说明。 实施例 1
制备粉末型涂料:
聚间苯二甲酸二烯丙酯 (分子量为 6χ 104) 含量为 65重量%, 固化交联剂的含量为 11 重量%, 抗老剂的含量为 2重量%, 流平剂的含量为 12重量%, 金红石型钛白粉的含量为 10重量%; 其制作工艺为: ①预混合; ②熔融挤出; ③压片; ④粉碎; ⑤筛分。
静电喷涂:
首先室温洁净环境中在 PET膜 (透过率为 1.0g/m224h, 厚度为 250 μιη) 表面静电喷涂 粉末涂料 (静电喷枪的电压为 90kv,电流为 20微安,静电喷枪与 PET膜之间的距离为 200mm, 喷涂的时间为 45秒), 转至专用固化设备中固化, 固化条件为 200°C, 10分钟。 固化后得到 厚度为 60μιη的第一耐候层, 同等环境下在 PET另一面静电喷涂粉末涂料 (喷涂的时间为 25秒), 转至专用固化设备中固化, 固化条件为 190°C, 20分钟, 得到厚度为 35μιη的第二 耐候层。 冷却得到太阳能电池背板 Al。 实施例 2
按照实施例 1的方法制备太阳能电池背板 Α2。 区别在于: 聚间苯二甲酸二烯丙酯 (分 子量为 9χ 104)含量为 60重量%,固化交联剂的含量为 10重量%,抗老剂的含量为 2重量%, 流平剂的含量为 13重量%, 金红石型钛白粉的含量为 15重量%。 实施例 3
按照实施例 1的方法制备太阳能电池背板 A3。 区别在于: 聚间苯二甲酸二烯丙酯 (分 子量为 2χ 104)含量为 55重量%, 固化交联剂的含量为 9重量%, 抗老剂的含量为 1重量%, 流平剂的含量为 15重量%, 金红石型钛白粉的含量为 20重量%。 第一耐候层的喷涂时间为 55秒, 厚度为 80μιη, 第二耐候层的喷涂时间为 15秒, 厚度为 25μιη。
实施例 4
按照实施例 1的方法制备太阳能电池背板 A4。 区别在于: 聚间苯二甲酸二烯丙酯 (分 子量为 13χ 104)含量为 70重量%,固化交联剂的含量为 6重量%,抗老剂的含量为 2重量%, 流平剂的含量为 10重量%, 金红石型钛白粉的含量为 12重量%。 第一耐候层的喷涂时间为 50秒, 厚度为 70μιη, 第二耐候层的喷涂时间为 20秒, 厚度为 30μιη。 对比例 1
首先在室温洁净环境中在 PET表面刮涂液体溶剂涂料, 所述液体溶剂涂料, 其主体树 脂为 PVDF, 含量为 32重量%, 钛白含量 26重量%, 交联剂含量为 6.5重量%, 溶剂醋酸 丁酯含量 35.5重量%湿膜厚度 80微米, 静置 10分钟, 转至专用固化设备中固化, 固化条件 为 80°C, 40分钟。 固化后, 同等环境下在 PET另一面静电喷涂 80微米湿膜厚度液体溶剂 涂料, 同样静置 10分钟, 转至专用固化设备中固化, 固化条件为 80°C, 40分钟。 冷却, 得 到太阳能电池背板 CA1。
测试方法及数据
1、 光反射率测试方法为: 取样尺寸: 50mm*50mm; 数量各 3pCS; 测试设备: 分光光 度计 Lambda 950; 分别测试样品表面 (EVA面) 的光反射率, 每个面设 3个测试点, 3点 成正三角形; 测试用的波长范围为 400-700nm, 每 10个波长范围测试 1次, 取其平均值。 结果见表 1。
2、 耐紫外老化
按照 IEC60664标准测试太阳能电池背板的耐紫外老化性能:
lOOOh: Ab<2 或
2000h: Ab<4 或
3000h: Ab≤5, 无分层和龟裂现象, 薄膜不得出现脆化或粉化及为合格。 结果见表 2。
表 1
从表 1中可以看出,本发明的太阳能电池背板的光反射率高于对比例的太阳能电池的背 板的光反射率, 说明本发明的太阳能电池背板的光反射率高。
从表 2中可以看出, 本发明的太阳能电池背板的色差 Ab小于 0.41, 远小于对比例的太 阳能电池的色差 1.48, 说明本发明的太阳能电池背板的耐紫外老化性能好。
以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在本发明的精神和原 则之内所作的任何修改、 等同替换和改进等, 均应包含在本发明的保护范围之内。
Claims
1. 一种太阳能电池背板, 其特征在于, 包括:
PET膜层;
第一耐候层, 所述第一耐候层形成于所述 PET膜层的上表面; 以及
第二耐候层, 所述第二耐候层形成于所述 PET膜层的下表面,
其中,
所述第一耐候层和所述第二耐候层的至少之一是由聚间苯类树脂材料形成的。
2. 根据权利要求 1 所述的太阳能电池背板, 其特征在于, 所述第一耐候层和第二耐候 层的至少之一是通过在所述 PET膜层的表面施加粉末型涂料而形成的,
其中,
所述粉末型涂料包括: 聚间苯类树脂材料、 固化交联剂、 抗老剂、 流平剂和金红石型钛 白粉。
3. 根据权利要求 2所述的太阳能电池背板, 其特征在于, 基于所述粉末型涂料的总重 所述聚间苯类树脂的含量为 55-70重量%,
所述固化交联剂的含量为 6-10重量%,
所述抗老剂的含量为 1-2重量%,
所述流平剂的含量为 10-15重量%, 以及
所述金红石型钛白粉的含量为 10-20重量%。
4. 根据权利要求 1-3中任一项所述的太阳能电池背板,其特征在于,所述聚间苯类树脂 为聚间苯二甲酸二烯丙酯。
5. 根据权利要求 4所述的太阳能电池背板, 其特征在于, 所述聚间苯二甲酸二烯丙酯 的分子量为 2χ 104-13χ 104。
6. 根据权利要求 5 所述的太阳能电池背板, 其特征在于, 所述聚间苯二甲酸二烯丙酯 的分子量为 6χ 104-9χ 104。
7. 根据权利要求 1所述的太阳能电池背板, 其特征在于, 所述 PET膜层水汽透过率小 于 2.0g/m2'24h。
8. 根据权利要求 1 所述的太阳能电池背板, 其特征在于, 所述 PET 膜层的厚度为 250-350μιη, 所述第一耐候层的厚度为 60-80 μιη, 所述第二耐候层的厚度为 25-35 μιη。
9. 一种太阳能电池背板的制备方法, 其特征在于, 包括:
提供 PET膜;
在 PET膜的上表面形成第一耐候层; 以及
在 PET膜的下表面形成第二耐候层, 得到所述太阳能电池背板;
其中,
所述第一耐候层和所述第二耐候层的至少之一是由聚间苯类树脂材料形成的。
10. 根据权利要求 9所述的制备方法, 其特征在于, 在所述 PET膜的上表面形成所述第 一耐候层包括在所述 PET膜的上表面静电喷涂粉末型涂料, 在所述 PET膜的下表面形成所 述第二耐候层包括在所述 PET膜的下表面静电喷涂所述粉末型涂料; 所述粉末型涂料包括 聚间苯类树脂材料、 固化交联剂、 抗老剂、 流平剂和金红石型钛白粉。
11. 根据权利要求 10 所述的制备方法, 其特征在于, 在进行所述静电喷涂时, 在静电 喷涂的 PET膜的表面的相对面上贴合有带电的基板, 所述基板接地; 所述静电喷涂用喷枪 为静电喷枪。
12. 根据权利要求 11所述的制备方法, 其特征在于, 所述静电喷枪的电压为 90-100kv, 电流为 15-30微安, 静电喷枪与 PET膜之间的距离为 100-200mm。
13. 根据权利要求 9-12中任一项所述的制备方法, 其特征在于, 在所述 PET膜的上表 面静电喷涂所述粉末型涂料包括将所述粉末型涂料喷涂 45-55秒,在所述 PET膜的下表面静 电喷涂所述粉末型涂料包括将所述粉末型涂料喷涂 15-25秒。
14. 根据权利要求 9-13中任一项所述的制备方法, 其特征在于, 在所述 PET膜的上表 面形成所述第一耐候层进一步包括将喷涂后的粉末型涂料在 200-210°C的温度条件下固化 8-10分钟; 在所述 PET膜的下表面形成所述第二耐候层进一步包括将喷涂后的粉末型涂料 在 180-190°C的温度条件下固化 15-20分钟。
15. 根据权利要求 10-14中任一项所述的制备方法, 其特征在于, 基于所述粉末型涂料 的总重量,
所述聚间苯类树脂的含量为 55-70重量%,
所述固化交联剂的含量为 6-10重量%,
所述抗老剂的含量为 1-2重量%,
所述流平剂的含量为 10-15重量%, 以及
所述金红石型钛白粉的含量为 10-20重量%。
16. 根据权利要求 9-15中任一项所述的制备方法,其特征在于,所述聚间苯类树脂为聚 间苯二甲酸二烯丙酯。
17. 根据权利要求 16所述的制备方法, 其特征在于, 所述聚间苯二甲酸二烯丙酯的分
子量为 2χ 104-13 χ 104。
18. 根据权利要求 17所述的制备方法, 其特征在于, 所述聚间苯二甲酸二烯丙酯的分 子量为 6χ 104 -9χ 104。
19. 根据权利要求 9 所述的制备方法, 其特征在于, 所述 PET 膜层水汽透过率小于 2.0g/m2+24h。
20. 根据权利要求 9所述的制备方法,其特征在于,所述 PET膜层的厚度为 250-350μιη, 所述第一耐候层的厚度为 60-80 μιη, 所述第二耐候层的厚度为 25-35 μιη。
21. 一种太阳能电池组件, 所述太阳能电池组件包括依次层叠的背板、 密封胶层、 电池 片、 密封胶层和盖板, 其特征在于, 所述背板为权利要求 1-8中任一项所述的太阳能电池背 板。
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| CN111504890A (zh) * | 2020-04-28 | 2020-08-07 | 烟台大学 | 一种钛白粉耐候性的快速检测方法 |
| CN111504890B (zh) * | 2020-04-28 | 2022-11-22 | 烟台大学 | 一种钛白粉耐候性的快速检测方法 |
| CN114420781A (zh) * | 2022-01-11 | 2022-04-29 | 苏州赛伍应用技术股份有限公司 | 一种蓝色高反射太阳能电池背板 |
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| CN104347743B (zh) | 2016-12-28 |
| CN104347743A (zh) | 2015-02-11 |
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