Investigation of soldering for crystalline silicon solar cells
Abstract
Purpose
Tabbing and stringing are the critical process for crystalline silicon solar module production. Because of the mismatch of the thermal expansion coefficients between silicon and metal, phenomenon of cell bowing, microcracks formation or cell breakage emerge during the soldering process. The purpose of this paper is to investigate the effect of soldering on crystalline silicon solar cells and module, and reveal soldering law so as to decrease the breakage rates and improve reliability for crystalline silicon solar module.
Design/methodology/approach
A microscopic model of the soldering process is developed by the study of the crystalline silicon solar cell soldering process in this work. And the defects caused by soldering were analyzed systematically.
Findings
The defects caused by soldering are analyzed systematically. The optimal soldering conditions are derived for the crystalline silicon solar module.
Originality/value
The quality criterion of soldering for crystalline silicon solar module is built for the first time. The optimal soldering conditions are derived for the crystalline silicon solar module. This study provides insights into solder interconnection reliability in the photovoltaic (PV) industry.
Keywords
Acknowledgements
The authors would like to thank the Natural Science Foundation of China for its support (Grant No. 61274050 and 61376067) and the support of National High Technology Research and Development Program of China (2015AA050301). This study was also supported by the Bureau of Science and Technology (2013k11-02).
Citation
Yang, H., Wang, H. and Cao, D. (2016), "Investigation of soldering for crystalline silicon solar cells", Soldering & Surface Mount Technology, Vol. 28 No. 4, pp. 222-226. https://doi.org/10.1108/SSMT-04-2015-0015
Publisher
:Emerald Group Publishing Limited
Copyright © 2016, Emerald Group Publishing Limited