CN117059682B - 一种具有高反射白色eva夹胶膜的光伏组件 - Google Patents
一种具有高反射白色eva夹胶膜的光伏组件 Download PDFInfo
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- WELLGRANCAVMDP-UHFFFAOYSA-N isocyanatoethane;prop-2-enoic acid Chemical compound CCN=C=O.OC(=O)C=C WELLGRANCAVMDP-UHFFFAOYSA-N 0.000 description 1
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- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
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- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
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- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
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Abstract
本发明涉及一种具有高反射白色EVA夹胶膜的光伏组件,其包括太阳能电池片及分别设置在所述太阳电池片两侧的玻璃前板和白色背板,所述玻璃前板与太阳能电池片之间设有一层透明EVA夹胶膜层,所述白色背板与太阳能电池片之间设有一层白色EVA夹胶膜层;所述白色EVA夹胶膜层由助剂、EVA树脂母料和白色填料化学改性EVA树脂复配组成。本发明具有高反射白色EVA夹胶膜的光伏组件,通过使用高反射率的白色EVA夹胶膜替代传统透明EVA夹胶膜进行电池片封装,不仅提高了EVA夹胶膜的耐热性,而且使其具有良好的弹性和抗蠕变性,从而进一步提高光伏组件的光电转化率和使用寿命。
Description
技术领域
本发明涉及光伏组件的技术领域,尤其涉及一种具有高反射白色EVA夹胶膜的光伏组件。
背景技术
光伏组件(也叫太阳能电池板)是太阳能发电系统中的核心部分,也是太阳能发电系统中最重要的部分。其作用是将太阳能转化为电能,并送往蓄电池中存储起来,或推动负载工作。EVA夹胶膜作为光伏组件部件之一,通常用于粘结太阳能电池片与背板和玻璃前板,然而光伏组件在使用过程中,由于封装效果不足,降低了太阳能电池片的使用寿命。
现有EVA夹胶膜尽管较好满足了胶膜制造与太阳能电池封装的需求,但是未经改性的EVA夹胶膜仍存在耐热性差,易延伸且弹性低,抗蠕变性差等问题,从而降低了光伏组件的光电转化率和使用寿命。
发明内容
鉴于以上现有技术的不足之处,本发明一方面提供了一种具有高反射白色EVA夹胶膜的光伏组件,以解决现有光伏组件存在的耐热性差,易延伸且弹性低,抗蠕变性差等问题,从而进一步提高光伏组件的光电转化率和使用寿命。
为达到以上目的,本发明采用的技术方案为:
一种具有高反射白色EVA夹胶膜的光伏组件,所述光伏组件包括太阳能电池片及分别设置在所述太阳电池片两侧的玻璃前板和白色背板,所述玻璃前板与太阳能电池片之间设有一层透明EVA夹胶膜层,所述白色背板与太阳能电池片之间设有一层白色EVA夹胶膜层;所述白色EVA夹胶膜层由助剂、EVA树脂母料和白色填料化学改性EVA树脂复配组成。本发明通过使用高反射率的白色EVA夹胶膜替代传统透明EVA夹胶膜进行电池片封装,通过反射太阳能电池片间隙和光伏组件周边未被太阳能电池片覆盖的区域光线来提高组件的发电效率;同时有效减少光伏组件生产工艺中由于抽压时间过短层压后EVA光伏组件出现气泡的现象,延长了光伏组件的使用寿命。
优选地,所述EVA树脂母料的熔融指数为20~40g/10min。本发明由高熔融指数EVA树脂母料复配的白色EVA夹胶膜层,具有优异的成膜加工性能。
优选地,所述白色填料化学改性EVA树脂由稀土掺杂异氰酸酯接枝改性EVA树脂与白色填料前驱体溶液通过化学键结合反应后得到。本发明利用改性EVA树脂上接枝的异氰酸酯官能团与白色填料表面的羟基官能团进行化学键的结合,一方面,使得白色填料均匀分布在白色EVA夹胶膜中,另一方面,化学键结合的方式,避免了白色填料的团聚或者物理迁移,提高了本申请白色EVA夹胶膜层的热稳定性和长期使用寿命。本发明随着溶剂的蒸发,异氰酸酯和羟基官能团反应产生的水在聚合物中形成小水滴,这些小水滴蒸发,留下无数微小的气孔,进一步使得聚合物呈现出亮白色。
优选地,所述稀土掺杂异氰酸酯接枝改性EVA树脂先由EVA醇解产物与烯基琥珀酸酐进行接枝反应,然后将反应中间产物浸渍在稀土溶液中,陈化反应一段时间后,再加入丙烯酸酯异氰酸酯继续进行反应得到。本发明先通过EVA醇解产物所含有的羟基官能团与烯基琥珀酸酐中的酸酐进行开环反应,得到含有羧基和不饱和双键的改性EVA树脂中间产物;进一步地,浸渍在稀土溶液中后,使得羧基官能团与稀土离子键合,通过化学键结合方式将稀土元素铈和/或镱添加至EVA树脂中,有效改善EVA树脂的导热性和粘结性,使氧气和水分无法进入,从而进一步提高本发明EVA夹胶膜的热稳定性;更进一步地,通过丙烯酸酯异氰酸酯与改性EVA树脂中间产物所带的不饱和双键进行加成反应,最终得到稀土掺杂异氰酸酯接枝改性EVA树脂。由此得到的稀土掺杂异氰酸酯接枝改性EVA树脂,不仅具有优异的耐热性,而且具有良好的弹性和抗蠕变性,从而进一步提高光伏组件的光电转化率和使用寿命。
优选地,所述EVA醇解产物是先将EVA树脂搅拌溶解在甲苯溶剂中,然后加入甲醇并滴加浓度为10~15g/L的氢氧化钠溶液,在一定温度条件下搅拌反应10~20min后,得到至少部分醇解的所述EVA醇解产物。
优选地,所述烯基琥珀酸酐为烯丙基琥珀酸酐、(2-甲基-2-丙烯基)琥珀酸酐、(丁-3-烯-1-基)琥珀酸酐中的至少一种。
优选地,所述丙烯酸酯异氰酸酯为异氰酸酯丙烯酸乙酯和/或甲基丙烯酸异氰基乙酯。
优选地,所述稀土溶液为质量浓度为5~15wt%的硝酸铈水溶液或硝酸镱水溶液。
优选地,所述白色填料前驱体溶液由质量比为20~30:100:0.5~1.5的二氧化钛、三乙胺和二月桂酸二丁基锡复配而成。
优选地,所述助剂为抗氧剂、紫外光吸收剂、光稳定剂中的至少一种。
与现有技术相比,本发明的有益效果为:
本发明具有高反射白色EVA夹胶膜的光伏组件,其EVA夹胶膜通过化学改性的方式,掺杂入了稀土并接枝有长支链的异氰酸官能团,进而以化学键结合方式连接有白色填料,通过使用高反射率的白色EVA夹胶膜替代传统透明EVA夹胶膜进行电池片封装,不仅提高了EVA夹胶膜的耐热性,而且使其具有良好的弹性和抗蠕变性,从而进一步提高光伏组件的光电转化率和使用寿命。
具体实施方式
以下描述用于揭露本发明以使本领域技术人员能够实现本发明。以下描述中的优选实施例只作为举例,本领域技术人员可以想到其他显而易见的变型。
实施例1
本实施例具有高反射白色EVA夹胶膜的光伏组件,所述光伏组件包括太阳能电池片及分别设置在所述太阳电池片两侧的玻璃前板和白色背板,所述玻璃前板与太阳能电池片之间设有一层透明EVA夹胶膜层,所述白色背板与太阳能电池片之间设有一层白色EVA夹胶膜层;所述白色EVA夹胶膜层由助剂、EVA树脂母料和白色填料化学改性EVA树脂复配组成。本发明的玻璃前板、白色背板、透明EVA夹胶膜层均选用本领域常规技术手段,此处不在赘述。
本实施例白色EVA夹胶膜层的制备包括以下步骤:
S1EVA醇解反应:先将80gEVA树脂搅拌溶解在250mL甲苯溶剂中,然后加入20mL甲醇并滴加浓度为15g/L的氢氧化钠溶液10mL,在60℃温度条件下搅拌反应20min后,得到EVA醇解产物,醇解度为68%。
S2稀土掺杂异氰酸酯接枝改性EVA树脂合成:按步骤S1得到的EVA醇解产物的羟基含量与烯丙基琥珀酸酐的摩尔比为1:1,将步骤S1得到的EVA醇解产物与烯丙基琥珀酸酐进行接枝反应,反应中加入适量的催化剂乙二醇锑,并控制反应温度105℃、操作压力为500Pa,反应0.5h;然后将80g反应中间产物浸渍在质量浓度为5wt%的硝酸铈水溶液中,陈化反应4h后;再加入异氰酸酯丙烯酸乙酯和少量过硫酸钠继续进行反应1.5h,反应中间产物与异氰酸酯丙烯酸乙酯的摩尔比为1:1.1,得到稀土掺杂异氰酸酯接枝改性EVA树脂。
S3白色填料化学改性EVA树脂合成:将质量比为20:100:0.5的二氧化钛、三乙胺和二月桂酸二丁基锡复配,得到白色填料前驱体溶液;然后将步骤S2得到的稀土掺杂异氰酸酯接枝改性EVA树脂超声分散在所述白色填料前驱体溶液中,加热升温到90℃,其与所述白色填料前驱体溶液通过化学键结合反应,得到白色填料化学改性EVA树脂。所述稀土掺杂异氰酸酯接枝改性EVA树脂与二氧化钛的质量比为20:3。
S4白色EVA夹胶膜层制备:将质量比为4:50:50的助剂、EVA树脂母料和步骤S3得到的白色填料化学改性EVA树脂复配,均匀涂布在玻璃基材上,60℃烘箱干燥45min,再在去离子水中浸泡24h后取下薄膜,并于80℃下真空干燥12h,得到所述白色EVA夹胶膜层。所述EVA树脂母料的熔融指数为30g/10min。所述助剂由质量比为1:2:1的抗氧剂亚磷酸三(2,4-二叔丁苯基)酯、紫外光吸收剂双水杨酸双酚A酯和光稳定剂2-(2’-羟基-5’-甲基苯基)-苯并三氮唑复配而成。
实施例2
本实施例具有高反射白色EVA夹胶膜的光伏组件,所述光伏组件包括太阳能电池片及分别设置在所述太阳电池片两侧的玻璃前板和白色背板,所述玻璃前板与太阳能电池片之间设有一层透明EVA夹胶膜层,所述白色背板与太阳能电池片之间设有一层白色EVA夹胶膜层;所述白色EVA夹胶膜层由助剂、EVA树脂母料和白色填料化学改性EVA树脂复配组成。本发明的玻璃前板、白色背板、透明EVA夹胶膜层均选用本领域常规技术手段,此处不在赘述。
本实施例白色EVA夹胶膜层的制备包括以下步骤:
S1EVA醇解反应:先将90gEVA树脂搅拌溶解在250mL甲苯溶剂中,然后加入18mL甲醇并滴加浓度为12g/L的氢氧化钠溶液7mL,在60℃温度条件下搅拌反应15min后,得到EVA醇解产物,醇解度为65%。
S2稀土掺杂异氰酸酯接枝改性EVA树脂合成:按步骤S1得到的EVA醇解产物的羟基含量与(2-甲基-2-丙烯基)琥珀酸酐的摩尔比为1:1.05,将步骤S1得到的EVA醇解产物与(2-甲基-2-丙烯基)琥珀酸酐进行接枝反应,反应中加入适量的催化剂乙二醇锑,并控制反应温度105℃、操作压力为600Pa,反应1h;然后将90g反应中间产物浸渍在质量浓度为10wt%的硝酸镱水溶液中,陈化反应6h后;再加入异氰酸酯丙烯酸乙酯和少量过硫酸钠继续进行反应1h,反应中间产物与异氰酸酯丙烯酸乙酯的摩尔比为1:1.05,得到稀土掺杂异氰酸酯接枝改性EVA树脂。
S3白色填料化学改性EVA树脂合成:将质量比为25:100:1的二氧化钛、三乙胺和二月桂酸二丁基锡复配,得到白色填料前驱体溶液;然后将步骤S2得到的稀土掺杂异氰酸酯接枝改性EVA树脂超声分散在所述白色填料前驱体溶液中,加热升温到90℃,其与所述白色填料前驱体溶液通过化学键结合反应,得到白色填料化学改性EVA树脂。所述稀土掺杂异氰酸酯接枝改性EVA树脂与二氧化钛的质量比为25:4。
S4白色EVA夹胶膜层制备:将质量比为5:40:60的助剂、EVA树脂母料和步骤S3得到的白色填料化学改性EVA树脂复配,均匀涂布在玻璃基材上,60℃烘箱干燥45min,再在去离子水中浸泡24h后取下薄膜,并于80℃下真空干燥12h,得到所述白色EVA夹胶膜层。所述EVA树脂母料的熔融指数为30g/10min。所述助剂由质量比为1:2:2的抗氧剂亚磷酸三(2,4-二叔丁苯基)酯、紫外光吸收剂双水杨酸双酚A酯和光稳定剂2-(2’-羟基-5’-甲基苯基)-苯并三氮唑复配而成。
实施例3
本实施例具有高反射白色EVA夹胶膜的光伏组件,所述光伏组件包括太阳能电池片及分别设置在所述太阳电池片两侧的玻璃前板和白色背板,所述玻璃前板与太阳能电池片之间设有一层透明EVA夹胶膜层,所述白色背板与太阳能电池片之间设有一层白色EVA夹胶膜层;所述白色EVA夹胶膜层由助剂、EVA树脂母料和白色填料化学改性EVA树脂复配组成。本发明的玻璃前板、白色背板、透明EVA夹胶膜层均选用本领域常规技术手段,此处不在赘述。
本实施例白色EVA夹胶膜层的制备包括以下步骤:
S1EVA醇解反应:先将100gEVA树脂搅拌溶解在250mL甲苯溶剂中,然后加入16mL甲醇并滴加浓度为10g/L的氢氧化钠溶液5mL,在60℃温度条件下搅拌反应10min后,得到EVA醇解产物,醇解度为63%。
S2稀土掺杂异氰酸酯接枝改性EVA树脂合成:按步骤S1得到的EVA醇解产物的羟基含量与(丁-3-烯-1-基)琥珀酸酐的摩尔比为1:1.1,将步骤S1得到的EVA醇解产物与(丁-3-烯-1-基)琥珀酸酐进行接枝反应,反应中加入适量的催化剂乙二醇锑,并控制反应温度105℃、操作压力为700Pa,反应1.5h;然后将100g反应中间产物浸渍在质量浓度为15wt%的硝酸铈水溶液中,陈化反应8h后;再加入甲基丙烯酸异氰基乙酯和少量过硫酸钠继续进行反应0.5h,反应中间产物与甲基丙烯酸异氰基乙酯的摩尔比为1:1.1,得到稀土掺杂异氰酸酯接枝改性EVA树脂。
S3白色填料化学改性EVA树脂合成:将质量比为30:100:1.5的二氧化钛、三乙胺和二月桂酸二丁基锡复配,得到白色填料前驱体溶液;然后将步骤S2得到的稀土掺杂异氰酸酯接枝改性EVA树脂超声分散在所述白色填料前驱体溶液中,加热升温到80℃,其与所述白色填料前驱体溶液通过化学键结合反应,得到白色填料化学改性EVA树脂。所述稀土掺杂异氰酸酯接枝改性EVA树脂与二氧化钛的质量比为30:5。
S4白色EVA夹胶膜层制备:将质量比为6:60:40的助剂、EVA树脂母料和步骤S3得到的白色填料化学改性EVA树脂复配,均匀涂布在玻璃基材上,60℃烘箱干燥45min,再在去离子水中浸泡24h后取下薄膜,并于80℃下真空干燥12h,得到所述白色EVA夹胶膜层。所述EVA树脂母料的熔融指数为30g/10min。所述助剂由质量比为1:1:1的抗氧剂亚磷酸三(2,4-二叔丁苯基)酯、紫外光吸收剂双水杨酸双酚A酯和光稳定剂2-(2’-羟基-5’-甲基苯基)-苯并三氮唑复配而成。
实施例4
本实施例具有高反射白色EVA夹胶膜的光伏组件,其白色EVA夹胶膜层材料及其制备步骤基本与实施例1相同,不同之处在于,本实施例中,采用(2-甲基-2-丙烯基)琥珀酸酐代替烯丙基琥珀酸酐,采用甲基丙烯酸异氰基乙酯代替异氰酸酯丙烯酸乙酯,采用硝酸镱水溶液代替硝酸铈水溶液。
将实施例1~4制备得到的具有高反射白色EVA夹胶膜及其光伏组件进行性能测试,其性能结果如表1所示:
表1
由此可见,本发明专利相比目前使用的技术具有相当大的优势。以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是本发明的原理,在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明的范围内。
Claims (9)
1.一种具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述光伏组件包括太阳能电池片及分别设置在所述太阳能电池片两侧的玻璃前板和白色背板,所述玻璃前板与太阳能电池片之间设有一层透明EVA夹胶膜层,所述白色背板与太阳能电池片之间设有一层白色EVA夹胶膜层;所述白色EVA夹胶膜层由助剂、EVA树脂母料和白色填料化学改性EVA树脂复配组成;所述白色填料化学改性EVA树脂由稀土掺杂异氰酸酯接枝改性EVA树脂与白色填料前驱体溶液通过化学键结合反应后得到。
2.如权利要求1所述的具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述EVA树脂母料的熔融指数为20~40g/10min。
3.如权利要求1所述的具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述稀土掺杂异氰酸酯接枝改性EVA树脂先由EVA醇解产物与烯基琥珀酸酐进行接枝反应,然后将反应中间产物浸渍在稀土溶液中,陈化反应一段时间后,再加入丙烯酸酯异氰酸酯继续进行反应得到。
4.如权利要求3所述的具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述EVA醇解产物是先将EVA树脂搅拌溶解在甲苯溶剂中,然后加入甲醇并滴加浓度为10~15g/L的氢氧化钠溶液,在一定温度条件下搅拌反应10~20min后,得到至少部分醇解的所述EVA醇解产物。
5.如权利要求3所述的具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述烯基琥珀酸酐为烯丙基琥珀酸酐、(2-甲基-2-丙烯基)琥珀酸酐、(丁-3-烯-1-基)琥珀酸酐中的至少一种。
6.如权利要求3所述的具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述丙烯酸酯异氰酸酯为异氰酸酯丙烯酸乙酯和/或甲基丙烯酸异氰基乙酯。
7.如权利要求3所述的具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述稀土溶液为质量浓度为5~15wt%的硝酸铈水溶液或硝酸镱水溶液。
8.如权利要求1所述的具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述白色填料前驱体溶液由质量比为20~30:100:0.5~1.5的二氧化钛、三乙胺和二月桂酸二丁基锡复配而成。
9.如权利要求1所述的具有高反射白色EVA夹胶膜的光伏组件,其特征在于,所述助剂为抗氧剂、紫外光吸收剂、光稳定剂中的至少一种。
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