CN111029431A - 一种太阳能电池正电极栅线及太阳能电池 - Google Patents
一种太阳能电池正电极栅线及太阳能电池 Download PDFInfo
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Abstract
本发明公开一种太阳能电池正电极栅线，包括多条纵向排列的主栅线、多条横向排列的副栅线、多列纵向排列的防断栅线，所述副栅线上靠近所述主栅线位置设有加粗副栅线一，所述副栅线上位于任意两条所述防断栅线中央的位置设有加粗副栅线二，所述加粗副栅线一、所述加粗副栅线二的宽度大于所述副栅线的宽度。采用本技术方案，可达到优异的防断栅效果，可以将窄线宽的效果最大化，从而大大提升电池的转换效率。
Description
技术领域
本发明涉及太阳能电池技术领域，尤其是一种太阳能电池正电极栅线及太阳能电池。
背景技术
晶硅太阳能电池的正电极主要由主栅线和副栅线组成，目前市场主要材质为贵金属银，其余低成本金属如铜还在开发中，未大量推广使用。正电极的作用为载流子的导出和传输，其欧姆接触效果，烧结时对p-n结的破坏程度，金属体电阻大小，遮光面积大小等因素都直接影响电池片的转换效率。其中，遮光面积大小是其中一个主要的影响因素，而遮光面积和副栅线的宽度直接相关，因此窄线宽技术为目前正电极优化的主要方向，可通过高目数网版，无网结网版，高粘度正银浆料等方法来实现。但是，在窄线宽技术的推广中，断栅很难避免：断栅一方面影响正电极的外观，另一方面直接影响电池的转换效率；因此解决断栅成为提高转换效率的一个重大研究课题。
发明内容
本发明要解决的技术问题是：目前太阳能电池副栅线容易断栅的问题。
本发明解决该技术问题采用的技术方案是：
一种太阳能电池正电极栅线，包括多条纵向排列的主栅线、多条横向排列的副栅线，其特征在于：还包括多列纵向排列的防断栅线，所述副栅线上靠近所述主栅线位置设有加粗副栅线一，所述副栅线上位于相邻两条所述防断栅线中央的位置设有加粗副栅线二，所述加粗副栅线一、所述加粗副栅线二的宽度大于所述副栅线的宽度。
作为优选，所述防断栅线在任意相邻的两条所述主栅线之间均匀分布，任意相邻的两条所述主栅线之间的所述防断栅线的数量为2～5列。
作为优选，所述防断栅线为将所述多条横向排列的副栅线相连的纵向实线。
作为优选，所述防断栅线为多条间隔设置的防断栅线段，所述防断栅线段连接与之相邻的两条以上副栅线。
作为优选，所述防断栅线的宽度大于等于所述副栅线的宽度。
作为优选，所述加粗副栅线一的长度为所述主栅线和相邻所述防断栅线之间距离的四分之一至四分之三。
作为优选，所述加粗副栅线二的长度为相邻两条所述防断栅线之间距离的四分之一至四分之三。
作为优选，所述加粗副栅线一、所述加粗副栅线二的宽度超出所述副栅线宽度2～10微米。
作为优选，所述加粗副栅线一靠近所述主栅线一端的宽度大于远离所述主栅线一端的宽度，所述加粗副栅线二中央的宽度大于两端的宽度。
一种可改善正电极断栅的太阳能电池，其特征在于：所述太阳能电池结构从上往下依次为如权利要求1～9中任一项所述的太阳能电池正电极栅线、复合减反膜、p-n结、硅基体、复合背钝化膜和背电极。
本发明的有益效果是：采用本技术方案，通过防断栅线、加粗副栅线一、加粗副栅线二等三种防断栅设计，达到了优异的防断栅效果，可以将窄线宽的效果最大化，从而大大提升电池的转换效率。
附图说明
图1是本发明的实施例正电极栅线结构示意图；
图2是本发明的实施例正电极栅线局部放大图；
图3是本发明的实施例正电极栅线加粗副栅线一位置放大图
图4是本发明的实施例太阳能电池结构示意图
图中：1.太阳能电池正面，2.主栅线，3.副栅线，4.防断栅线，5.加粗副栅线一，6.加粗副栅线二，7.正电极栅线，8.复合减反膜，9.p-n结，10.硅基体，11.复合背钝化膜，12.背电极
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。
如图1～4所示，一种可改善正电极断栅的太阳能电池，其结构从上往下依次为太阳能电池正电极栅线7、复合减反膜8、p-n结9、硅基体10、复合背钝化膜11、背电极12。
正电极栅线7设在太阳能电池正面1，包括五条纵向排列的主栅线2、多条横向排列的副栅线3、八列纵向排列的防断栅线4，任意相邻的两条主栅线2之间的防断栅线4的数量为两列，副栅线3上靠近主栅线2位置设有加粗副栅线一5，副栅线3上位于相邻两条防断栅线4中央的位置设有加粗副栅线二6，加粗副栅线一5、加粗副栅线二6的宽度大于副栅线3的宽度。
防断栅线4为多条间隔设置的防断栅线段，防断栅线段连接与之相邻的两条副栅线3。
防断栅线4的宽度等于副栅线3的宽度。
加粗副栅线一5的长度为主栅线2和相邻防断栅线4之间距离的二分之一。
加粗副栅线二6的长度为相邻两条防断栅线4之间距离的二分之一。
加粗副栅线一5、加粗副栅线二6的宽度超出副栅线3的宽度2微米。
加粗副栅线一5靠近主栅线2一端的宽度大于远离主栅线2一端的宽度，加粗副栅线二6中央的宽度大于两端的宽度。
本发明可改变为多种方式对本领域的技术人员是显而易见的，这样的改变不认为脱离本发明的范围。所有这样的对所述领域技术人员显而易见的修改将包括在本权利要求的范围之内。
Claims (10)
1.一种太阳能电池正电极栅线，包括多条纵向排列的主栅线、多条横向排列的副栅线，其特征在于：还包括多列纵向排列的防断栅线，所述副栅线上靠近所述主栅线位置设有加粗副栅线一，所述副栅线上位于相邻两条所述防断栅线中央的位置设有加粗副栅线二，所述加粗副栅线一、所述加粗副栅线二的宽度大于所述副栅线的宽度。
2.如权利要求1所述的太阳能电池正电极栅线，其特征在于：所述防断栅线在任意相邻的两条所述主栅线之间均匀分布，任意相邻的两条所述主栅线之间的所述防断栅线的数量为2～5列。
3.如权利要求1所述的太阳能电池正电极栅线，其特征在于：所述防断栅线为将所述多条横向排列的副栅线相连的纵向实线。
4.如权利要求1所述的太阳能电池正电极栅线，其特征在于：所述防断栅线为多条间隔设置的防断栅线段，所述防断栅线段连接与之相邻的两条以上副栅线。
5.如权利要求1所述的太阳能电池正电极栅线，其特征在于：所述防断栅线的宽度大于等于所述副栅线的宽度。
6.如权利要求1所述的太阳能电池正电极栅线，其特征在于：所述加粗副栅线一的长度为所述主栅线和相邻所述防断栅线之间距离的四分之一至四分之三。
7.如权利要求1所述的太阳能电池正电极栅线，其特征在于：所述加粗副栅线二的长度为相邻两条所述防断栅线之间距离的四分之一至四分之三。
8.如权利要求1所述的太阳能电池正电极栅线，其特征在于：所述加粗副栅线一、所述加粗副栅线二的宽度超出所述副栅线宽度2～10微米。
9.如权利要求1所述的太阳能电池正电极栅线，其特征在于：所述加粗副栅线一靠近所述主栅线一端的宽度大于远离所述主栅线一端的宽度，所述加粗副栅线二中央的宽度大于两端的宽度。
10.一种可改善正电极断栅的太阳能电池，其特征在于：所述太阳能电池结构从上往下依次为如权利要求1～9中任一项所述的太阳能电池正电极栅线、复合减反膜、p-n结、硅基体、复合背钝化膜和背电极。
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| CN208781859U (zh) * | 2018-09-13 | 2019-04-23 | 北京太阳能电力研究院有限公司 | 多主栅太阳能电池正电极图形 |
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| CN104362190A (zh) * | 2014-10-13 | 2015-02-18 | 山东力诺太阳能电力股份有限公司 | 一种太阳电池用叉指状电极 |
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| CN106784050A (zh) * | 2016-12-30 | 2017-05-31 | 青岛瑞元鼎泰新能源科技有限公司 | 太阳能铝背全覆盖无主栅晶硅电池片及其生产工艺 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113594273A (zh) * | 2021-08-27 | 2021-11-02 | 浙江晶科能源有限公司 | 一种电池片以及光伏组件 |
| CN113594273B (zh) * | 2021-08-27 | 2023-08-15 | 浙江晶科能源有限公司 | 一种电池片以及光伏组件 |
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