The BALVER ZINN Group, alloy provider, will highlight its solar applications in Hall4/Level2/A51a at the 25th EU PVSEC in Valencia, Spain from 6-9 September 2010.
(September 3, 2010) — The BALVER ZINN Group, alloy provider, will highlight its solar applications in Hall4/Level2/A51a at the 25th EU PVSEC in Valencia, Spain from 6-9 September 2010.
Balver Zinn is working closely with suppliers of PV ribbon products. Materials are supplied by Balver Zinn to produce tin precision copper flat wire for solar cell tabbing and string interconnects. Different hot-dip tinning alloys are available including lead-free materials.
In order to clean surfaces, a flux is needed. When it comes to cleaning, the Cobar division of Balver Zinn can help to provide a total solution. Cobar, now a part of the Balver Zinn Group, is a successful materials supplier to the electronics industry and provides a wide range of fluxes for cleaning oxidized surfaces of different metallization. This knowledge is used to create fluxes that have excellent properties in cleaning more difficult surfaces like AgAl on the photovoltaic cells.
Fluxes are applied in the stringing or tabbing soldering process of the PV cells. The solder coated ribbons are dipped into the flux or are already flux coated (another method is flux spraying) before connecting them to the collector grid. The function of the flux is to clean the surface and to promote the wetting of the ribbon. For this process, a wide range of fluxes are available including alcohol, low VOC and VOC-free fluxes. Cobar/Balver Zinn was successful in designing a flux coated ribbon for the stringing of PV cells, these types of ribbons eliminate the external application of flux in the soldering process.
For those who want to hand solder their own solar panels, Cobar/Balver Zinn offers flux pens that can be refilled with fluxes to removed oxides and promote wetting in order to create strong interconnections that are resistant enough for the standard industry pull tests.