CN108365043B - 一种光伏电池片组件的互联结构 - Google Patents

一种光伏电池片组件的互联结构 Download PDF

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CN108365043B
CN108365043B CN201810373810.XA CN201810373810A CN108365043B CN 108365043 B CN108365043 B CN 108365043B CN 201810373810 A CN201810373810 A CN 201810373810A CN 108365043 B CN108365043 B CN 108365043B
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尹丙伟
余波
洪布双
闫涛
谢耀辉
张鹏
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Tongwei Solar Hefei Co Ltd
Tongwei Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
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    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0508Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0512Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module made of a particular material or composition of materials
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0516Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module specially adapted for interconnection of back-contact solar cells
    • YGENERAL 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
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    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

本发明公开了一种光伏电池片组件的互联结构,包括电池片和互联结构,所述电池片的上、下表面均印刷有电极,所述正电极与背电极上均连接有互联结构;所述互联结构包括导电胶层、连接焊带以及刚性导电带,所述导电胶层固定于电极上,所述连接焊带活动设置于导电胶层远离电池片一侧,所述导电胶块与导电胶层固定连接;所述竖孔中活动插设有导电柱,所述导电柱一端活动连接于导电胶块上,且导电柱远离导电胶块一端固定连接于连接焊带上。本发明的互联结构不仅可以使导电胶层有效的避免胶体流动,减轻导电胶的浪费情况,而且使得连接焊带在导电效果良好的情况下,可以轻松的将连接焊带取下,实用性很强,非常值得推广。

Description

一种光伏电池片组件的互联结构
技术领域
本发明涉及光伏电池片互联技术领域,具体为一种光伏电池片组件的互联结构。
背景技术
随着地球基于碳、氢元素的油气不可再生资源的日益枯竭,太阳能电池可利用其光生伏的效应将太阳能光线转化为电能,具有绿色环保、取之不尽用之不竭等特点,是人类替代常规油气能源的重要发展方向。太阳能电池一般可分为晶体硅太阳能电池、薄膜太阳能电池、染料敏化太阳能电池和有机太阳能电池。经过多年的技术进步和市场推广比较成熟,目前晶体硅太阳能电池逐步在太阳能领域中占据主导地位。
为提高晶体硅太阳能电池的光电转换效率,研究人员期望尽量减少太阳能电池受光面入射光线的遮挡面积,为此,背接触太阳能电池技术开发出来。背接触太阳能电池技术是一种将太阳能电池正面电池进入到电池背面,使得电池正负极同时处在电池背面的电池技术,然后采用金属焊带将所有电池片的正电极进行焊接后实现电气连接。
为保证背板上的焊带与电池片正负极有效连接,公开号为“CN102938432A”的中国专利公开了一种MWT太阳电池组件的制备方法,其在MWT太阳电池背面印刷非对称分布的正负极接触电极,并烧结;在正负接触电极上分别设置焊带,经焊接处理使焊带分别与正负接触电极相连接,并通过焊带焊接将相邻MWT太阳电池相串联,形成串焊电池片;将各组件按玻璃、EVA、串焊电池片、EVA和背板材料的顺序排列并经含层压、固化和封装工序处理形成MWT太阳电池组件。该方法采用焊接方式进行连接,虽然可以保证MWT电池背面正负电极的电气连接,但由于一般焊接温度在300℃以上,同时由于在电池片一面进行焊接,导致电池片正背面瞬间产生巨大热应力,导致电池片严重弯曲,甚至造成电池片隐裂和碎裂,从而使良率降低,成本上升,而且组件封装工艺采用高温焊接,电池片的厚度降低对常规组件工艺碎片率影响很大,给电池片薄片化降低成本带来难度。
为了解决上述问题,现有技术中,申请号为“201510357042.5”的导电胶、太阳能电池串及其制备方法,公开了一种导电胶、太阳能电池串及其制备方法,通过在焊带的焊点处铺设导电胶,然后在焊点间铺设绝缘材料,放置电池片,加热导电胶同时按压电池片与焊带,得到太阳能电池串,实现电池片之间的互联,通过采用低温固化的导电胶实现将焊带与电池接触点部分有效粘连起来,同时其具有良好的导电性,实现背接触电池间电池的电气连接,并且导电胶固化温度较低,产生热应力较小,从而有效降低了太阳能电池片弯曲、隐裂和破碎的比例。
但是,上述该铺设导电胶,进行电池片之间的互联的结构,仍然存在较为明显的缺陷:1、需要适当的温度对导电胶进行加温,因为没有对导电胶的边缘限制,使得导电胶在加热后变软,可能会发生软体流动,造成导电胶在粘接过程中无法实现整齐对接的效果,也会造成导电胶的浪费;2、焊带与导电胶连接完成后,无法轻易的将焊带取下,当出现问题时,不好对焊带进行分离处理,非常麻烦。
发明内容
本发明的目的在于提供一种光伏电池片组件的互联结构,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:
一种光伏电池片组件的互联结构,包括电池片和互联结构,所述电池片的上、下表面均印刷有电极,所述电极分为正电极和背电极,所述正电极与背电极上均连接有互联结构;
所述互联结构包括导电胶层、连接焊带以及刚性导电带,所述导电胶层固定于电极上,所述连接焊带活动设置于导电胶层远离电池片一侧;
所述刚性导电带固定设置于导电胶层的两侧,所述刚性导电带中开设有竖孔,所述竖孔靠近电池片一端连接有凹槽,所述凹槽中设置有导电胶块,所述导电胶块与导电胶层固定连接;
所述竖孔中活动插设有导电柱,所述导电柱一端活动连接于导电胶块上,且导电柱远离导电胶块一端固定连接于连接焊带上。
优选的,所述连接焊带靠近导电胶层一侧开设有安装槽,所述安装槽内设置有固定块,所述固定块靠近导电胶层一侧固定连接有连接柱,所述连接柱与导电胶层活动连接。
与现有技术相比,本发明的有益效果是:
1、本发明在使用时,由于导电胶层的边缘设置有刚性导电带,使得导电胶层在加热后,不会轻易的发生流动,使得刚性导电带直接通过导电胶层粘接在电极上,不会造成导电胶的浪费,从而使得导电胶层的整齐对接效果更好;
2、本发明的连接焊带通过导电柱直接插接在刚性导电带上,连接效果更好,而且可以通过将导电柱取出的方法,使得连接焊带可以很好的进行分离,使得焊带可以进行回收和整修,非常方便。
本发明的互联结构不仅可以使导电胶层有效的避免胶体流动,减轻导电胶的浪费情况,而且使得连接焊带在导电效果良好的情况下,可以轻松的将连接焊带取下,实用性很强,非常值得推广。
附图说明
图1为现有技术中电池片互联结构示意图;
图2为现有技术中电池片间互联示意图;
图3为本发明的电池片正电极互联结构示意图;
图4为本发明的电池片背电极互联结构示意图;
图5为本发明的电池片间互联示意图;
图6为本发明的互联结构内部示意图;
图7为本发明的A区结构放大示意图;
图8为本发明的B区结构放大示意图。
图中:1电池片、2正电极、3背电极、4导电胶层、41导电胶块、5连接焊带、51安装槽、52固定块、53连接柱、6刚性导电带、61竖孔、62凹槽、63导电柱。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
请参阅图1-8,本发明提供一种技术方案:
一种光伏电池片组件的互联结构,包括电池片1和互联结构,电池片1的上、下表面均印刷有电极,电极分为正电极2和背电极3,正电极2与背电极3上均连接有互联结构,如说明书附图3所示,互联结构连接在正电极2上,如说明书附图4所示,互联结构连接在背电极3上,每个电池片1的正电极2和背电极3上均连接有互联结构,且相邻电池片1间的连接方式,如说明书附图5所示,采用正电极2上的互联结构与相邻电池片1的背电极3上的互联结构相连接的方式。
如说明书附图6所示,互联结构包括导电胶层4、连接焊带5以及刚性导电带6,导电胶层4固定于电极上,通过加热升温使得导电胶层4具有粘性,刚性导电带6固定设置于导电胶层4的两侧,通过导电胶层4将刚性导电带6固定在电极上,两侧的刚性导电带6对导电胶层4进行限位,如说明书附图7所示,刚性导电带6中开设有竖孔61,竖孔61靠近电池片1一端连接有凹槽62,凹槽62中设置有导电胶块41,导电胶块41与导电胶层4固定连接,导电胶块41与导电胶层4为一体成型的胶层块,导电胶块41主要起到对刚性导电带6的粘接固定作用。
竖孔61中活动插设有导电柱63,导电柱63一端活动连接于导电胶块41上,且导电柱63远离导电胶块41一端固定连接于连接焊带5上,连接焊带5活动设置于导电胶层4远离电池片1一侧,连接焊带5不直接与导电胶层4连接,通过导电柱63的导电连接作用,使得连接焊带5可以进行导电引流作用,也便于连接焊带5的取下。
作为一个优选,如说明书附图7所示,为了便于连接焊带5对电极进行导电引流,在连接焊带5靠近导电胶层4一侧开设有安装槽51,安装槽51内设置有固定块52,固定块52靠近导电胶层4一侧固定连接有连接柱53,连接柱53与导电胶层4活动连接,连接点更多更均匀,使得连接焊带5与导电胶层4之间的引流效果更好。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。

Claims (2)

1.一种光伏电池片组件的互联结构,包括电池片(1)和互联结构,所述电池片(1)的上、下表面均印刷有电极,所述电极分为正电极(2)和背电极(3),其特征在于:所述正电极(2)与背电极(3)上均连接有互联结构;
所述互联结构包括导电胶层(4)、连接焊带(5)以及刚性导电带(6),所述导电胶层(4)固定于电极上,所述连接焊带(5)活动设置于导电胶层(4)远离电池片(1)一侧;
所述刚性导电带(6)固定设置于导电胶层(4)的两侧,所述刚性导电带(6)中开设有竖孔(61),所述竖孔(61)靠近电池片(1)一端连接有凹槽(62),所述凹槽(62)中设置有导电胶块(41),所述导电胶块(41)与导电胶层(4)固定连接;
所述竖孔(61)中活动插设有导电柱(63),所述导电柱(63)一端活动连接于导电胶块(41)上,且导电柱(63)远离导电胶块(41)一端固定连接于连接焊带(5)上。
2.根据权利要求1所述的一种光伏电池片组件的互联结构,其特征在于:所述连接焊带(5)靠近导电胶层(4)一侧开设有安装槽(51),所述安装槽(51)内设置有固定块(52),所述固定块(52)靠近导电胶层(4)一侧固定连接有连接柱(53),所述连接柱(53)与导电胶层(4)活动连接。
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