CN104810309A - 辊道式太阳电池烧结和辐照退火一体连续炉 - Google Patents

辊道式太阳电池烧结和辐照退火一体连续炉 Download PDF

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CN104810309A
CN104810309A CN201510203266.0A CN201510203266A CN104810309A CN 104810309 A CN104810309 A CN 104810309A CN 201510203266 A CN201510203266 A CN 201510203266A CN 104810309 A CN104810309 A CN 104810309A
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sintering
solar cell
roller
radiation annealing
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CN104810309B (zh
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袁向东
许颖
袁瑒
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BEIJING JINSHENG YANGGUANG TECHNOLOGY Co.,Ltd.
Shandong Jinsheng Photovoltaic Equipment Co.,Ltd.
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BEIJING JINSHENG YANGGUANG TECHNOLOGY Co Ltd
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Abstract

本发明涉及一种辊道式太阳电池烧结和辐照退火一体连续炉，可用于太阳电池的烧结和辐照退火处理，由上料区、烧结区、烧结冷却区、辐照退火区、退火冷却区和下料区组成，电池片在一组水平排列的辊道上传输，并依次经过上述各区，一次性完成太阳电池的烧结和辐照退火过程。本发明从根本上解决辐照退火工艺的规模化生产问题，从而最大限度地解决太阳电池在使用过程中的衰减问题。

Description

辊道式太阳电池烧结和辐照退火一体连续炉
技术领域
本发明涉及一种辊道式太阳电池烧结和辐照退火一体连续炉，可用于太阳电池的烧结和辐照退火处理。
背景技术
在太阳电池的整个生产工艺流程中，扩散、印刷和烧结三道工序是最主要的。其中，烧结工艺主要用于烘干印刷在硅片表面的浆料，烧掉从浆料中挥发出的有机溶剂，同步烧结太阳电池硅片的正反面，使印刷至硅片上浆料中的金属电极与硅片形成良好的欧姆接触，烧结质量的好坏直接影响太阳电池的转换效率。通常情况下，太阳电池用链式烧结炉烧结后，即可做成组件，投入太阳能电站使用。
太阳电池因为硼氧对的存在，在使用过程中长期光照环境下会发生效率衰减，尤其是近几年兴起的PERC电池，这种衰减尤为严重。研究表明，预先使用一种特定的光源在一定温度条件下对电池片进行辐照退火处理，会有效防止这种衰减现象发生。但是，目前尚没有专门对电池片进行辐照退火处理的设备。
为此，申请人发明了一种辊道式太阳电池烧结和辐照退火一体连续炉，使电池片在辊式炉中完成烧结后、直接连续完成辐照退火处理，从根本上解决辐照退火工艺的规模化生产问题。
发明内容
根据以上现有技术的不足，本发明所要解决的技术问题是：提供一种辊道式太阳电池烧结和辐照退火一体连续炉，从根本上解决辐照退火工艺的规模化生产问题，从而最大限度地解决太阳电池在使用过程中的衰减问题。
本发明所述的辊道式太阳电池烧结和辐照退火一体连续炉，由上料区、烧结区、烧结冷却区、辐照退火区、退火冷却区和下料区组成，电池片在一组水平排列的辊道上传输，并依次经过上述各区，一次性完成太阳电池的烧结和辐照退火过程。
在所述的辊道的上方设置有光源、在辊道的下方设置有加热装置，或者在辊道的下方设置有光源、在辊道的上方设置有加热装置，电池片在传输过程中，其正面朝向光源，其背面朝向加热装置。
所述的光源为卤素灯、氙灯、白炽灯或LED灯。
所述的加热装置为红外灯管、电热丝或热风机。
在所述光源与电池片之间，设置一层透光隔热材料层，将光源隔离在电池片加热区域之外。
在安装光源的腔室内，设置有对光源进行冷却的吹风冷却装置或排风装置，对光源进行冷却。
所述的透光隔热材料层材质为石英玻璃或钢化玻璃。
通过加热装置对电池片的加热温度是100℃—300℃，优选150℃—250℃
优选的是，光源的辐照度是50mW/cm2—200mW/cm2，80mW/cm2—150mW/cm2。
所述辊道的材质为石英陶瓷、石英玻璃、氧化铝陶瓷、氮化硅陶瓷、不锈钢或铝合金等对电池片没有污染、耐高温的材料。
所述的辊道为实心辊道或空心辊道，辊道的形状为等径的圆柱状、台阶状、圆锥台状、螺纹状或圆环状，辊道可以单向转动、也可以往复转动。
在烧结冷却区和辐照退火区之间，设置有缓冲区，缓冲区内设置有可对烧结后的电池片进行加热及保温的加热保温装置，或者缓冲区内设置将烧结后的电池片暂时存储的储存装置，或者缓冲区内设置将烧结后的电池片单列分成多列传输到辐照退火区的分列装置。在缓冲区可以保持一定的温度将烧结后的电池片直接送入辐照退火区，也可以将烧结后的电池片暂时存储，也可以将单列分成多列传输到辐照退火区。
所述的缓冲区加热保温装置的设定温度是50℃—200℃。
与现有技术相比，本发明具有的有益效果是：
本发明提供的辊道式太阳电池烧结和辐照退火一体连续炉，将烧结工艺和辐照退火工艺有机地组合在一起、形成一条连续的生产线，并且电池片通过一组水平排列的辊道连续传输、在水平行进过程中连续完成烧结和辐照退火处理，具有能耗低、运行平稳、产能大、连续化生产的特点，推广应用后，可以最大限度地解决太阳电池使用过程中衰减的问题。
附图说明
图1是本发明结构示意图
图中：1、上料区；2、烧结区；3、烧结冷却区；4、缓冲区；5、辐照退火区；6、退火冷却区；7、下料区；8、电池片；9、辊道；10、加热装置；11、光源；12、透光隔热材料层。
具体实施方式
下面结合附图对本发明的实施例做进一步描述。
实施例1
如图1所示，本辊道式太阳电池烧结和辐照退火一体连续炉由上料区1、烧结区2、烧结冷却区3、缓冲区4、辐照退火区5、退火冷却区6、下料区7组成，辊道9沿水平方向排列并依次穿过各区，电池片8在辊道9上随辊道9转动向前输送，电池片8进入上料区1后，在辊道9的传输下进入烧结区2，完成烧结后，进入烧结冷却区3，然后进入缓冲区4，在辊道9的传输下继续进入辐照退火区5。电池片8完成辐照退火后，通过退火冷却区6冷却，进入下料区7，即完成了整个烧结和辐照退火过程。
烧结区2在辊道9的上方、或下方、或上方和下方设置有加热器，烧结冷却区3设有冷却装置。
缓冲区4设置在烧结冷却区3、与辐照退火区5之间，可以保持一定的温度将烧结后的电池片8直接送入辐照退火区5，也可以将烧结后的电池片8暂时存储，也可以将单列分成多列传输到辐照退火区5。
辐照退火区5包括光源11、上炉壳、透光隔热材料层12、下炉壳和加热装置10组成，上炉壳、下炉壳形成炉腔，辊道9穿过炉腔，电池片8在辊道9的传输下水平行进，进入辐照退火区5，在辐照退火区5的下部设置有加热装置10，在辐照退火区5的上部设置有光源11，在安装光源11的腔室内，设置有对光源11进行冷却的吹风冷却装置或排风装置，在光源11的下部设置有透光隔热材料层12，将加热区域和光源11隔开，以防止热量把光源11烧坏。退火冷却区6设有冷却风机，电池片8完成辐照退火后，通过冷却风机冷却，即完成了整个辐照退火过程。
光源11可以为卤素灯、氙灯、白炽灯或LED灯，加热装置10可以为红外灯管、电热丝或热风机，辊道9为实心辊道或空心辊道，辊道9的形状为等径的圆柱状、台阶状、圆锥台状、螺纹状或圆环状，辊道9的材质为石英陶瓷、石英玻璃、氧化铝陶瓷、氮化硅陶瓷、不锈钢或铝合金，透光隔热材料层12材质为石英玻璃或钢化玻璃，本实施例中，使用的辊道9是石英陶瓷辊、光源11是卤钨灯、加热装置10是红外灯管、透光隔热材料是石英玻璃板；烧结温度是800—850℃；缓冲区4的温度一般是50—200℃，最好是100—200℃；辐照退火区5的加热温度是100℃—300℃，较好是150℃—250℃，光源11的辐照度是50mW/cm2—200mW/cm2，较好是80mW/cm2—150mW/cm2。
实施例2
辐照退火区5的下部设置有光源11，在辐照退火炉的上部设置有加热装置10，在光源11与辊道9底面之间设置有透光隔热材料层12，透光隔热材料层12将上部加热区域和光源11隔开，其余同实施例1。
尽管本发明的实施方案已公开如上，但其并不仅仅限于说明书和实施方式中所列运用，它完全可以被适用于各种适合本发明的领域，对于熟悉本领域的人员而言，可容易地实现另外的修改，因此在不背离权利要求及等同范围所限定的一般概念下，本发明并不限于特定的细节和这里示出与描述的图例。

Claims (12)

1.一种辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：由上料区(1)、烧结区(2)、烧结冷却区(3)、辐照退火区(5)、退火冷却区(6)和下料区(7)组成，电池片(8)在一组水平排列的辊道(9)上传输，并依次经过上述各区，一次性完成太阳电池的烧结和辐照退火过程。
2.根据权利要求1所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：在所述的辊道(9)的上方设置有光源(11)、在辊道(9)的下方设置有加热装置(10)，或者在辊道(9)的下方设置有光源(11)、在辊道(9)的上方设置有加热装置(10)，电池片(8)在传输过程中，其正面朝向光源(11)，其背面朝向加热装置(10)。
3.根据权利要求2所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：所述的光源(11)为卤素灯、氙灯、白炽灯或LED灯。
4.根据权利要求2所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：所述的加热装置(10)为红外灯管、电热丝或热风机。
5.根据权利要求2所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：在所述光源(11)与电池片(8)之间，设置一层透光隔热材料层(12)，将光源(11)隔离在电池片(8)加热区域之外。
6.根据权利要求5所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：在安装光源(11)的腔室内，设置有对光源(11)进行冷却的吹风冷却装置或排风装置。
7.根据权利要求5所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：所述的透光隔热材料层(12)材质为石英玻璃或钢化玻璃。
8.根据权利要求2所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：通过加热装置(10)对电池片(8)的加热温度是100℃—300℃。
9.根据权利要求2所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：所述光源(11)的辐照度是50mW/cm2—200mW/cm2。
10.根据权利要求2所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：所述辊道(9)的材质为石英陶瓷、石英玻璃、氧化铝陶瓷、氮化硅陶瓷、不锈钢或铝合金。
11.根据权利要求2所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：所述的辊道(9)为实心辊道或空心辊道，辊道(9)的形状为等径的圆柱状、台阶状、圆锥台状、螺纹状或圆环状。
12.根据权利要求1～11任一所述的辊道式太阳电池烧结和辐照退火一体连续炉，其特征在于：在烧结冷却区(3)和辐照退火区(5)之间，设置有缓冲区(4)，缓冲区(4)内设置有可对烧结后的电池片(8)进行加热及保温的加热保温装置，或者缓冲区(4)内设置将烧结后的电池片(8)暂时存储的储存装置，或者缓冲区(4)内设置将烧结后的电池片(8)单列分成多列传输到辐照退火区(5)的分列装置。
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Patentee before: BEIJING JINSHENG YANGGUANG TECHNOLOGY Co.,Ltd.

Co-patentee before: Yuan Xiangdong