SOLAR MODULES OF BACK-CONTACT CELLS CONNECTED WITH LAMINATION-CURING CONDUCTIVE ADHESIVE

摘要

Back-contact solar cells are already coming into production, and since they display several advantages over conventional cells, their volume of production is very likely to expand strongly in the near future. Nonetheless, innovative tabbing and stringing solutions have to be worked out before the module assembly of back-contact cells can be automated. One of the solutions proposed is the Pick-&-Place technique where automated arms would place the cells and all the tabbing material directly on the front glass of the panel, which would stay at the same place during the whole module assembly process. This concept is particularly well suited when all the contacts of the cells are on the same side, and when conductive adhesives are used, one of the best alternatives to release the stress in cell tabbing. We present here a detailed study on the combination of back-contact cells and conductive adhesives for module assembling. We first select among several conductive adhesives the one that is best suited, and, then we manufacture 2 full-size modules with back-contact cells and conductive adhesive. Finally we discuss the results, identify the possible problems and discuss the outcome of reliability tests.