CN107134500A - 小规格太阳能电池、太阳能电池及其制备方法 - Google Patents

小规格太阳能电池、太阳能电池及其制备方法 Download PDF

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CN107134500A
CN107134500A CN201710311055.8A CN201710311055A CN107134500A CN 107134500 A CN107134500 A CN 107134500A CN 201710311055 A CN201710311055 A CN 201710311055A CN 107134500 A CN107134500 A CN 107134500A
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郭俊盼
戴伟
王乐
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Changzhou Trina Solar Energy Co Ltd
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Abstract

本发明公开了一种小规格太阳能电池、由小规格太阳电池串联成的太阳能电池,以及,上述两种太阳能电池的制备方法,属于太阳能电池技术领域。本发明可降低太阳电池互联连接的电阻率、提高散热性能;防止电池片隐裂或碎片。

Description

小规格太阳能电池、太阳能电池及其制备方法
技术领域
本发明涉及一种太阳能电池片,尤其涉及一种小规格太阳能电池、由小规格太阳电池串联成的太阳能电池,以及,上述两种太阳能电池的制备方法,属于太阳能电池技术领域。
背景技术
目前光伏行业的太阳组件大多是采用常规的太阳能电池片,电池片为多个电极栅线,多个电极栅线一起组成一个完整的电池,且相邻电极栅线之间距离相等,然后通过涂锡导电铜带焊接互联组成组件。
图1、图2示出了现有太阳能电池的正面和背面,如图所示,每个太阳能电池有3-5个正电极(1)和背电极(2),且每个电极之间距离相等,同时,3-5个电极为一个整体使用。如图9所示,多个太阳能电池之间采用涂锡导电铜线(8)串联。
这种结构的太阳能电池由于涂锡导电铜带电阻率偏大以及膨胀系数与电池片的电极银材料不同,在热胀冷缩时容易产生应力导致电池片隐裂或碎片。
发明内容
本发明针对现有技术中,太阳能电池片由于焊带材料与电池片电极材料不同,容易导致电池片隐裂或碎片的技术问题,提供一种可沿平行于电极方向切割的太阳能电池,防止电池片隐裂或碎片。
为此,本发明采用如下技术方案:
一种小规格太阳能电池,其特征在于:由正常规格太阳能电池片沿电极方向切割而成,在其正面设置有正电极,在其背面设置有背电极,且正电极和背电极分别位于小规格太阳能电池的两端,正电极宽度为0.8~1.2mm,背面背电极宽度为1~1.7mm。
一种太阳能电池,其特征在于:包括若干尺寸相同的电池小片,在每一电池小片的正面设置有正电极,在其背面设置有背电极,且正电极和背电极分别位于电池小片的两端,相邻的电池小片的两端层叠使上一电池小片的背电极与下一电池小片的正电极连接,层叠区域的宽度为0.8~2mm。
进一步地,相邻的太阳能电池小片的两端通过导电银胶形成电连接,层叠区域的厚度为15~60μm。
进一步地,每一太阳能电池小片正电极宽度为0.8~1.2mm,背面背电极宽度为1~1.7mm。
进一步地,太阳能电池小片的数量为3-5片。
本发明的另一方面,公开了一种小规格太阳能电池的制备方法,包括如下步骤:
S1:通过网版设计印刷成在常规尺寸的太阳能电池片上形成若干个包含正电极(3)和背电极(6)的电池小片(5),正电极(3)位于电池小片的正面,背电极(6)位于电池小片单元的背面,且正电极和背电极分别位于电池小片的两端;
S2:相邻电池小片(5)之间形成一个用于切割的切割区间(4);
S3:沿着的切割区间(4)进行切割,形成若干独立的电池小片(5);电池小片(5)可单独使用或者若干电池小片(5)串联起来使用。
本发明的另一方面,还公开了一种太阳能电池的制备方法,包括如下步骤:
S1:通过网版设计印刷成在常规尺寸的太阳能电池片上形成若干个包含正电极(3)和背电极(6)的电池小片(5),正电极(3)位于电池小片的正面,背电极(6)位于电池小片的背面,且正电极和背电极分别位于电池小片的两端;
S2:相邻电池小片(5)之间形成一个用于切割的切割区间(4);
S3:沿着的切割区间(4)进行切割,形成若干独立的电池小片(5);
S4:若干电池小片(5)通过导电银胶材料(9)将上一电池小片的背电极(6)与下一电池小片的正电极(3)连接;形成太阳能电池。
进一步地,所述正电极宽度为0.8~1.2mm,背面背电极宽度为1~1.7mm。
进一步地,上一电池小片的背电极(6)与下一电池小片的正电极(3)之间重叠区域的宽度为0.8~2mm,厚度为15~60μm。
进一步地,所述电池小片(5)的数量为3-5个。
本发明与现有技术相比,具有如下有益效果:
1、本发明的小规格太阳能电池可以单独使用,也可以与其他小规格太阳能电池串联起来使用。每个小规格太阳能电池正面的正电极与背面的背电极分别在电池片的两端,呈对角状态;便于交叠焊接使用。
2、若干小规格太阳能电池(电池小片)通过导电银胶材料将上一片电池的背电极与下一片电池的正电极连接,形成一个正常规格的太阳能电池。一方面是导电银胶中的导电银颗粒和电池片的正电极、背电极的银浆结合更加紧密,降低了电阻率同时也提高了散热性能;另一方面用导电银胶替代常规的涂锡导电铜带避免了因导电铜带与电极膨胀系数不同更容易产生应力而导致电池片隐裂或碎片。
附图说明
图1为现有太阳能电池正面图;
图2为现有太阳能电池背面图;
图3为本发明太阳能电池正面图(一);
图4为本发明太阳能电池背面图(一);
图5为本发明太阳能电池正面图(二);
图6为本发明太阳能电池背面图(二);
图7为本发明太阳能电池切片后正面图;
图8为本发明太阳能电池切片后背面图;
图9为现有太阳能电池相互连接图;
图10为本发明中太阳能电池相互连接图;
其中:1为现有太阳能电池的正电极;2为现有太阳能电池的背电极;3为本发明电池小片的正电极;4为切割区间;5为本发明的电池小片;6为本发明电池小片的背电极;7为现有的太阳能电池;8为涂锡导电铜线;9为导电银胶。
具体实施方式
下面结合附图和具体实施例对本发明作进一步以详细描述。
实施例1
如图7、图8所示,本发明的一种小规格太阳能电池,由正常规格太阳能电池片沿电极方向切割而成,在其正面设置有正电极3,在其背面设置有背电极6,且正电极和背电极分别位于小规格太阳能电池的两端,正电极宽度为0.8~1.2mm,背面背电极宽度为1~1.7mm。
在本发明中,定义与小规格太阳能电池的电极长度方向平行的两个边缘为两端;正常规格太阳能电池指包括3-5个尺寸相同的电池小片,如图3-6;小规格太阳能电池指切割后的独立小片,如图7,图8。应当说明是:本申请中小规格与正常规格并非指实际尺寸意义上的大或小;本申请的“小规格”是指在常规规格的基础上切割成的相对于正常规格而言的小片电池片。
实施例2
如图7、图8、图10所示,本发明的一种太阳能电池,包括3-5个尺寸相同的电池小片5,在每一电池小片5的正面设置有正电极3,在其背面设置有背电极6,且正电极和背电极分别位于电池小片的两端,相邻的电池小片的两端层叠使上一电池小片的背电极与下一电池小片的正电极连接,层叠区域的宽度为0.8~2mm。相邻的太阳能电池小片的两端通过导电银胶9形成电连接,层叠区域的厚度(即导电银胶9的厚度)为15~60μm。
每一太阳能电池小片正电极3宽度为0.8~1.2mm,背电极6宽度为1~1.7mm。
为了描述方便,在本实施例中,使用了“电池小片”指代实施例1中的“小规格太阳能电池”。
实施例3
如图3-8所示,本发明的另一方面,公开了一种小规格太阳能电池的制备方法,包括如下步骤:
S1:通过网版设计印刷成在常规尺寸的太阳能电池片上形成若干个包含正电极3和背电极6的电池小片5,正电极3位于电池小片的正面,背电极6位于电池小片单元的背面,且正电极和背电极分别位于电池小片的两端;
S2:相邻电池小片5之间形成一个用于切割的切割区4;
S3:沿着的切割区间4进行切割,形成若干独立的电池小片5;电池小片5可单独使用或者若干电池小片5串联起来使用。
实施例4
如图3-8、图10所示,本发明的另一方面,还公开了一种太阳能电池的制备方法,包括如下步骤:
S1:通过网版设计印刷成在常规尺寸的太阳能电池片上形成3-5个包含正电极3和背电极6的电池小片5,正电极3位于电池小片的正面,背电极6位于电池小片的背面,且正电极和背电极分别位于电池小片的两端;正电极3的宽度为0.8~1.2mm,背电极6的宽度为1~1.7mm;为了便于印刷,如图3、图4所示,相邻电池小片5的之间的电极间距并不完全一致。
S2:相邻电池小片5之间形成一个用于切割的切割区间4;
S3:沿着的切割区间4进行切割,形成若干独立的电池小片5;
S4:若干电池小片5通过导电银胶材料9将上一电池小片的背电极6与下一电池小片的正电极3连接;上一电池小片的背电极6与下一电池小片的正电极3之间重叠区域的宽度为0.8~2mm,厚度为15~60μm;形成太阳能电池。
以上所述的具体实施例,对本发明解决的技术问题、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本专利的具体实施例而已,并不用于限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (10)

1.一种小规格太阳能电池,其特征在于:由正常规格太阳能电池片沿电极方向切割而成,在其正面设置有正电极,在其背面设置有背电极,且正电极和背电极分别位于小规格太阳能电池的两端,正电极宽度为0.8~1.2mm,背面背电极宽度为1~1.7mm。
2.一种太阳能电池,其特征在于:包括若干尺寸相同的电池小片,在每一电池小片的正面设置有正电极,在其背面设置有背电极,且正电极和背电极分别位于电池小片的两端,相邻的电池小片的两端层叠使上一电池小片的背电极与下一电池小片的正电极连接,层叠区域的宽度为0.8~2mm。
3.根据权利要求2所述的太阳能电池,其特征在于:相邻的太阳能电池小片的两端通过导电银胶形成电连接,层叠区域的厚度为15~60μm。
4.根据权利要求2所述的太阳能电池,其特征在于:每一太阳能电池小片正电极宽度为0.8~1.2mm,背面背电极宽度为1~1.7mm。
5.根据权利要求2所述的太阳能电池,其特征在于:太阳能电池小片的数量为3-5片。
6.一种小规格太阳能电池的制备方法,包括如下步骤:
S1:通过网版设计印刷成在常规尺寸的太阳能电池片上形成若干个包含正电极(3)和背电极(6)的电池小片(5),正电极(3)位于电池小片的正面,背电极(6)位于电池小片单元的背面,且正电极和背电极分别位于电池小片的两端;
S2:相邻电池小片(5)之间形成一个用于切割的切割区间(4);
S3:沿着的切割区间(4)进行切割,形成若干独立的电池小片(5);电池小片(5)可单独使用或者若干电池小片(5)串联起来使用。
7.一种太阳能电池的制备方法,包括如下步骤:
S1:通过网版设计印刷成在常规尺寸的太阳能电池片上形成若干个包含正电极(3)和背电极(6)的电池小片(5),正电极(3)位于电池小片的正面,背电极(6)位于电池小片的背面,且正电极和背电极分别位于电池小片的两端;
S2:相邻电池小片(5)之间形成一个用于切割的切割区间(4);
S3:沿着的切割区间(4)进行切割,形成若干独立的电池小片(5);
S4:若干电池小片(5)通过导电银胶材料(9)将上一电池小片的背电极(6)与下一电池小片的正电极(3)连接;形成太阳能电池。
8.根据权利要求7所述的太阳能电池的制备方法,其特征在于:所述正电极宽度为0.8~1.2mm,背面背电极宽度为1~1.7mm。
9.根据权利要求7所述的太阳能电池的制备方法,其特征在于:上一电池小片的背电极(6)与下一电池小片的正电极(3)之间重叠区域的宽度为0.8~2mm,厚度为15~60μm。
10.根据权利要求7所述的太阳能电池的制备方法,其特征在于:所述电池小片(5)的数量为3-5个。
CN201710311055.8A 2017-05-05 2017-05-05 小规格太阳能电池、太阳能电池及其制备方法 Pending CN107134500A (zh)

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