背接触电池锡膏印刷工艺优化及焊接性能提升研究  

Study on Optimization of Solder Paste Printing Process and Improvement of Welding Performance for Back Contact Cells

作　　者：杨增英 郭强强 赵邦桂 王琪 刘喆 YANG Zengying;GUO Qiangqiang;ZHAO Banggui;WANG Qi;LIU Zhe(Xining Solar Electric Power Branch,Qinghai Huanghe Hydropower Development Co.,Ltd.,Xining 810000,China;Xi’an Solar Electric Power Branch,Qinghai Huanghe Hydropower Development Co.,Ltd.,Xi’an 710100,China)

机构地区：[1]青海黄河上游水电开发有限责任公司西宁太阳能电力分公司,西宁810000 [2]青海黄河上游水电开发有限责任公司西安太阳能电力分公司,西安710100

出　　处：《材料导报》2024年第S02期328-331,共4页Materials Reports

摘　　要：背接触电池(BC电池)因其高光电转换效率和广泛的应用潜力而备受关注。然而,其制造过程存在诸多挑战,尤其是背场末道浆料印刷工艺,这是提高电池性能的关键步骤。本工作旨在对背场末道锡膏印刷工艺进行优化,提升BC电池的性能并降低生产成本,进而促进其产业化发展。通过对比分析正负极焊点的力学性能,发现将负极末道锡膏印刷位置调整至绝缘胶区域可以显著增强负极焊接拉力。本工作还探索和验证了在组件端焊接过程中不使用助焊剂的可行性和有效性。实验结果表明,采用优化后的锡膏印刷工艺,电池片在无需添加助焊剂的情况下仍能实现高质量的焊接,并且可以进行量产。这不仅保证了焊接质量,还降低了生产成本。本工作为BC电池的制造工艺提供了宝贵的优化方案,对提升BC电池的整体性能和降低生产成本具有指导意义。Back contact cells(BC cells)have attracted much attention due to their high photoelectric conversion efficiency and wide potential applications.However,there are many challenges in its manufacturing process,especially in the back field final paste printing process,which is a key step in improving cell performance.The aim of this study is to optimize the printing process of back field solder paste to improve the performance of BC cells and reduce production costs,thereby promoting their industrial development.In the experiment,we conducted a comparative analysis of the mechanical properties of the positive and negative electrode solder joints,and found that adjusting the printing position of the negative electrode solder paste to the insulation adhesive area can significantly enhance the tensile strength of negative electrode welding.In addition,we also explored the feasibility of omitting the use of flux during the module end soldering process and verified the effectiveness of this approach through experiments.The experiment confirmed that using the optimized solder paste printing process,cells can still achieve high-quality soldering without the flux,and can be mass-produced.This not only ensures welding quality,but also reduces production costs.The output of this work provides valuable optimization solutions for the manufacturing process of BC cells,and is of pilot significance for improving the overall performance of BC cells and reducing production costs.

关 键 词：背接触电池(BC电池) 锡膏印刷 焊接拉力 无助焊剂焊接 

分 类 号：TK019[动力工程及工程热物理]