摘要
为了解决管板式(平板式)固体氧化物燃料电池的密封问题,在大气中使用95AgCu焊料片对单电池片和金属连接体进行了封接实验.利用X光无损检测技术对比分析了95AgCu焊料片和粉状焊膏的区别,并通过单电池的寿命测试对焊接质量进行了评价.结果表明:利用X光无损检测结果,可以优化焊接工艺,实现用成型焊片形成高质量、无孔隙的焊缝;在750℃下,测量了120h内开路电压和单电池功率,它们基本没有变化,说明本钎焊材料和工艺适合SOFC堆的密封.
In order to solve the sealing problems of tube plate type（plate type）solid oxide fuel cell（SOFC）,95 AgCu solder was used to seal single cell and interconnector by air brazing.The difference between 95 AgCu solder and powder was analyzed by X-ray nondestructive testing and the welding quality was evaluated through life test of single cells.Results show that the use of X-ray nondestructive test can not only optimize the welding process,but also form high-quality and imporous weld utilizing a forming welding piece.Measured open circuit voltage and single cell power within 120 hat 750℃show that brazing materials and the process are suitable for sealing the SOFC stack.
