The development of the SCHMID Multi-Busbar Connector is moving into its last phase – the production-ready design of the machine for serial production. Its presentation is planned for the 1st quarter 2013. All the experiences from prototyping are channeled back into this design phase.
The Multi-Busbar technology is based on an innovative cell structure which completely manages without the well-known wide busbars. The silver consumption compared to the conventional cell is reduced by 75% and less shadowing promises an efficiency increase of 0.6%abs.
The Multi-Busbar technology obtains the best results with SCHMID processes and equipment for the production of a cell with selective emitter (inline selective emitter technology InSecT) and approx. 40 μm wide contact fingers (contact-free high-efficiency metallization technology HiMeT). The key processes for this cell manufacturing technology are the contact-free inkjet printing as well as wet bench etching processes and plating technology. The cell backside is 100 percent silver-free thanks to SCHMID’s TinPad technology.
The Multi-Busbar Connector subsequently attaches 15 wire busbars to the front side of these basic cells using contact-free infrared soldering and at the same time joins multiple cells into a string. The smaller distances between the wires reduce the series resistance of the cells and thus increase the fill factor by up to 0.3%.
The manufacturing of these high efficiency multi-busbar modules is the result of persistently combining all resource-saving technologies SCHMID has developed for the front side in the last years. Therefore the technology leader is providing urgently needed solutions for reducing the costs in photovoltaic production.
Innovative cell structure promises 0.6%abs gain of efficiency compared to 3-busbar cells.
Lower series resistance provides higher fill factor of up to 0.3%.
Reduction of silver consumption on the front and back side of approx. 75% compared to a 3-busbar screen printed cell.
Finish of the last project phase with production-ready machine in 1st quarter of 2013.
News published on 04 / 06 / 2012 by Bharat Vasandani