CN111029428A - 一种双面双玻光伏组件 - Google Patents
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Abstract
本发明公开了一种双面双玻光伏组件,包括采用层压工艺制备而成的层压件,其特征在于,所述层压件包括从下至上依次设置的下玻璃层、第一层压封装膜、第一电池片层、第二层压封装膜、透光绝缘层、第三层压封装膜、第二电池片层、第四层压封装膜和上玻璃层。采用两组单面电池片合成的双面双玻光伏组件,针对正面组件受到的太阳辐射多,背面组件受到的太阳辐射少的情况,有效地解决了背面组件因受光不足导致较低的光电转化效率的问题,降低成本,提高发电量。
Description
技术领域
本发明涉及光伏发电技术领域,尤其涉及一种双面双玻光伏组件。
背景技术
目前广泛使用的光伏组件大部分为单面组件,单面组件采用单面太阳能电池片,这种结构的太阳能电池片只能正面接收光线,背面无法吸收光线,因此单面电池片的功率输出相对有限。相比于单片太阳能电池片,双面太阳能电池片的正反两面均能吸收光线,因而极大增加了电池片的整体功率输出及转换效率。
一篇申请号为201720932482.3、名称为一种切片双面双玻光伏组件的发明专利,公开了一种切片双面双玻光伏组件,包括由上而下依次设置的压延钢化玻璃、第一透明封装胶膜、切片双面电池串、第二透明封装胶膜和压延玻璃;所述的切片双面电池串是由焊带连接多个切片电池片组成,焊带表面贴有反光贴膜;组件背面安装接线盒。但现有的双面光伏组件在实际的工作中还是存在诸多问题:1)双面光伏电池片在正面受太阳辐射多,在背面受太阳辐射少,受现有双面光伏电池片本身结构及工作原理的制约,会产生因受光不足导致较低的光电转化效率。2)双面光伏电池片在制作过程存在因复杂工艺产生的较高成本的问题。
发明内容
针对现有技术中存在的问题,本发明的目的在于提供一种光电转化效率不受正背面受光量差异影响且节约成本的双面双玻光伏组件。
为达到以上目的,本发明采用如下技术方案:
一种双面双玻光伏组件,包括采用层压工艺制备而成的层压件,其特征在于,所述层压件包括从下至上依次设置的下玻璃层、第一层压封装膜、第一电池片层、第二层压封装膜、透光绝缘层、第三层压封装膜、第二电池片层、第四层压封装膜和上玻璃层。
作为上述方案的进一步说明,所述上玻璃层和所述下玻璃层均为低铁超白绒面钢化玻璃;所述下玻璃层的低铁超白绒面钢化玻璃的光滑面朝下、绒面朝上;所述上玻璃层的低铁超白绒面钢化玻璃的绒面朝下、光滑面朝上。
作为上述方案的进一步说明,所述第一层压封装膜、第二层压封装膜、第三层压封装膜、第四层压封装膜为EVA胶膜、环氧树脂胶膜或高透明共聚烯烃胶膜。
作为上述方案的进一步说明,所述第一层压封装膜、第二层压封装膜、第三层压封装膜、第四层压封装膜都为EVA胶膜;所述第一层压封装膜置于所述下玻璃层上侧,所述第一层压封装膜的光滑面朝下、绒面朝上;所述第二层压封装膜置于所述第一电池片层上侧,绒面朝下、光滑面朝上;所述第三层压封装膜置于所述透光绝缘层上侧,光滑面朝下、绒面朝上;所述第四层压封装膜置于所述第二电池片层上侧,绒面朝下、光滑面朝上。
作为上述方案的进一步说明,所述透光绝缘层为亚克力板、聚碳酸脂板、苯乙烯丙烯腈板或苯乙烯-甲基丙烯酸甲酯共聚物板。
作为上述方案的进一步说明,所述第一电池片层和所述第二电池片层为晶体硅电池片、PERC电池片或叠瓦组件。
作为上述方案的进一步说明,所述晶体硅电池片为单晶硅电池片或多晶硅电池片。
作为上述方案的进一步说明,所述第一电池片层的受光面朝下、背光极朝上,所述第二电池片层的受光面朝上、背光极朝下。
本发明的有益效果是:
一、采用两组单面电池片合成双面双玻光伏组件,针对正面组件受到的太阳辐射多,背面组件受到的太阳辐射少的情况,有效地解决了背面组件因受光不足导致较低的光电转化效率的问题,降低成本,提高发电量。
二、采用低铁超白绒面钢化玻璃,有效提高双面双玻光伏组件的抗承载,防水和耐火性,增加双面双玻光伏组件的应用场合;减少光线的反射和散射,提高发电量。
三、采用亚克力板作为两个电池片层的绝缘夹层,有效解决在层压过程中出现的正面组件与背面组件短路问题;又不阻碍入射光线透过组件,增加背面太阳辐射;提高整体组件的美观性。
四、采用EVA胶膜可让更多的光子到达电池片表面,提高发电效率,提高了抗PID性能。
附图说明
图1所示为本发明提供的双面双玻光伏组件的结构图。
附图标记说明:
1:下玻璃层,2:第一层压封装膜,3:第一电池片层,4:第二层压封装膜,5:透光绝缘层,6:第三层压封装膜,7:第二电池片层,8:第四层压封装膜,9:上玻璃层。
具体实施方式
在本发明的描述中,需要说明的是,对于方位词,如有术语“中心”,“横向”、“纵向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示方位和位置关系为基于附图所示的方位或位置关系,仅是为了便于叙述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定方位构造和操作,不能理解为限制本发明的具体保护范围。
此外,如有术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或隐含指明技术特征的数量。由此,限定有“第一”、“第二”特征可以明示或者隐含包括一个或者多个该特征,在本发明描述中,“至少”的含义是一个或一个以上,除非另有明确具体的限定。
在本发明中,除另有明确规定和限定,如有术语“组装”、“相连”、“连接”术语应作广义去理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;也可以是机械连接;可以是直接相连,也可以是通过中间媒介相连,可以是两个元件内部相连通。对于本领域普通技术人员而言,可以根据具体情况理解上述的术语在本发明中的具体含义。
在发明中,除非另有规定和限定,第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触,也可以包括第一特征和第二特征不是直接接触而是通过它们之间的另外特征接触。而且,第一特征在第二特征“之上”、“之下”和“上面”包括第一特征在第二特征正上方和斜上方,或仅仅是表示第一特征水平高度高于第二特征的高度。第一特征在第二特征“之上”、“之下”和“下面”包括第一特征在第二特征正下方或斜下方,或仅仅表示第一特征水平高度低于第二特征。
下面结合说明书的附图,对本发明的具体实施方式作进一步的描述,使本发明的技术方案及其有益效果更加清楚、明确。下面通过参考附图描述实施例是示例性的,旨在解释本发明,而不能理解为对本发明的限制。
如图1所示,一种双面双玻光伏组件,包括采用层压工艺制备而成的层压件,其特征在于,所述层压件包括从下至上依次设置的下玻璃层1、第一层压封装膜2、第一电池片层3、第二层压封装膜4、透光绝缘层5、第三层压封装膜6、第二电池片层7、第四层压封装膜8和上玻璃层9。采用两个单面电池片层组成双面光伏组件可以降低成本,解决背面组件受光不足导致较低的光电转化效率,在两单面电池片层之间设有透光绝缘层,有效解决在层压过程中会出现的正面组件与背面组件短路的问题;又不阻碍入射光线透过组件,增加背面太阳辐射;可以提高整体组件的美观性。
其中,所述上玻璃层9和下玻璃层1都为低铁超白绒面钢化玻璃;位于所述下玻璃层1的低铁超白绒面钢化玻璃的光滑一面朝下,绒面一面朝上;位于所述上玻璃层9的铁超白绒面钢化玻璃的绒面一面朝下,光滑一面朝上。所述铁超白绒面钢化玻璃含铁量低,从侧面看为白色,增加光线的透过率,绒面可以减少光的反射,强度高,内部张力,破碎也不会散;使得入射光更多被所述第一电池片层、所述第二电池片层吸收,减少反射、散射。
所述第一层压封装膜2、第二层压封装膜4、第三层压封装膜6、第四层压封装膜8为EVA胶膜、环氧树脂胶膜或高透明共聚烯烃胶膜。
所述透光绝缘层5为亚克力板、聚碳酸酯板、苯乙烯丙烯腈板、苯乙烯-甲基丙烯酸甲酯共聚物板。
所述第一电池片层3和所述第二电池片层7为晶体硅电池片、PERC电池片或叠瓦组件。
优选地,所述晶体硅电池片为单晶硅电池片或多晶硅电池片;单晶硅光伏组件具有16%-19%转换效率,但制造能耗高,价格昂贵;多晶硅光伏组件具有15%-17%的光电转化效率,但制造效率中,价格中等。
所述第一层压封装膜2、第二层压封装膜4、第三层压封装膜6、第四层压封装膜8为EVA胶膜,EVA为乙烯-醋酸乙烯共聚物;EVA胶膜具有较宽的温度范围,有良好的柔软性、耐冲击强度、耐环境应力开裂、和良好的光学性能、耐低温、及无毒的特性。
所述第一层压封装膜2放置在所述下玻璃层1上侧,光滑一面朝下、绒面一面朝上;作用是在高温层压时融化,粘合第一电池片层和下玻璃层,保护第一电池片层不受外力影响;冷却后,固化结构,可吸收大量紫外光,起到增透作用。
所述第二层压封装膜4放置在所述第一电池片层3上侧,绒面一面朝下、光滑一面朝上;作用是在高温层压时融化,粘合第一电池片层和透光绝缘层,保护第一电池片层不受外力影响;冷却后,固化结构;可吸收大量紫外光,增透。
所述第三层压封装膜6放置在所述透光绝缘层5上侧,光滑一面朝下、绒面一面朝上;作用是在高温层压时融化,粘合第二电池片层和透光绝缘层,保护第二电池片层不受外力影响;冷却后,固化结构;可吸收大量紫外光,增透。
所述第四层压封装膜8放置在所述所述第二电池片层7上侧,绒面一面朝下、光滑一面朝上;作用是在高温层压时融化,粘合第二电池片层和上玻璃层,保护第二电池片层不受外力影响;冷却后,固化结构;可吸收大量紫外光,增透。
优选地,所述透光绝缘层5为亚克力板,所述亚克力板的材质为聚甲基丙烯酸甲酯。具有较好的透明性、化学稳定性和耐候性、易染色、易加工、外观优美等优点。
进一步优选地,所述第一电池片层3和所述第二电池片层7为单晶硅电池片。
所述第一电池片层3的受光面朝下,背光极朝上;所述第二电池片7层的受光面朝上,背光极朝下。
与现有技术相比,本实施例提供的一种双面双玻光伏组件,具有以下特点:1)采用两组单面电池片合成的双面双玻光伏组件,针对正面组件受到的太阳辐射多,背面组件受到的太阳辐射少的情况,有效地解决了背面组件因受光不足导致较低的光电转化效率的问题,降低成本,提高发电量。2)采用低铁超白绒面钢化玻璃,有效提高双面双玻光伏组件的抗承载,防水和耐火性,增加双面双玻光伏组件的应用场合;减少光线的反射和散射,提高发电量。3)采用亚克力板作为两个电池片层的绝缘夹层,有效解决在层压过程中出现的正面组件与背面组件短路问题;又不阻碍入射光线透过组件,增加背面太阳辐射;提高整体组件的美观性。4)采用EVA胶膜可让更多的光子到达电池片表面,提高发电效率,提高了抗PID性能。
通过上述的结构和原理的描述,所属技术领域的技术人员应当理解,本发明不局限于上述的具体实施方式,在本发明基础上采用本领域公知技术的改进和替代均落在本发明的保护范围,本发明的保护范围应由各权利要求项及其等同物限定之。具体实施方式中未阐述的部分均为现有技术或公知常识。
Claims (8)
1.一种双面双玻光伏组件,包括采用层压工艺制备而成的层压件,其特征在于,所述层压件包括从下至上依次设置的下玻璃层、第一层压封装膜、第一电池片层、第二层压封装膜、透光绝缘层、第三层压封装膜、第二电池片层、第四层压封装膜和上玻璃层。
2.根据权利要求1所述的一种双面双玻光伏组件,其特征在于,所述上玻璃层和所述下玻璃层均为低铁超白绒面钢化玻璃;所述下玻璃层的低铁超白绒面钢化玻璃的光滑面朝下、绒面朝上;所述上玻璃层的低铁超白绒面钢化玻璃的绒面朝下、光滑面朝上。
3.根据权利要求1所述的一种双面双玻光伏组件,其特征在于,所述第一层压封装膜、第二层压封装膜、第三层压封装膜、第四层压封装膜为EVA胶膜、环氧树脂胶膜或高透明共聚烯烃胶膜。
4.根据权利要求3所述的一种双面双玻光伏组件,其特征在于,所述第一层压封装膜、第二层压封装膜、第三层压封装膜、第四层压封装膜都为EVA胶膜;所述第一层压封装膜置于所述下玻璃层上侧,所述第一层压封装膜的光滑面朝下,绒面朝上;所述第二层压封装膜置于所述第一电池片层上侧,绒面朝下、光滑面朝上;所述第三层压封装膜置于所述透光绝缘层上侧,光滑面朝下、绒面朝上;所述第四层压封装膜置于所述第二电池片层上侧,绒面朝下、光滑面朝上。
5.根据权利要求1所述的一种双面双玻光伏组件,其特征在于,所述透光绝缘层为亚克力板、聚碳酸脂板、苯乙烯丙烯腈板或苯乙烯-甲基丙烯酸甲酯共聚物板。
6.根据权利要求1所述的一种双面双玻光伏组件,其特征在于,所述第一电池片层和所述第二电池片层为晶体硅电池片、PERC电池片或叠瓦组件。
7.根据权利要求6所述的一种双面双玻光伏组件,其特征在于,所述晶体硅电池片为单晶硅电池片或多晶硅电池片。
8.根据权利要求1所述的一种双面双玻光伏组件,其特征在于,所述第一电池片层的受光面朝下、背光极朝上,所述第二电池片层的受光面朝上、背光极朝下。
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