Ribbon interconnection of 6' BC-BJ Solar Cells
| Autor: | Ulrich Eitner, Johann Walter, Andreas Halm, Valentin D. Mihailetchi, Li Carlos Rendler, Achim Kraft |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Modultechnologie
PV solar module Materials science Modulcharakterisierung Busbar Gebrauchsdauer- und Schadensanalyse BC-BJ chemistry.chemical_element 02 engineering and technology Temperature cycling Photovoltaische Module und Kraftwerke ribbon 010402 general chemistry 01 natural sciences 7. Clean energy law.invention law wave-shaped ribbon Solar cell Ribbon wave bending process photovoltaisches Modul bending process Composite material Interconnection business.industry Electrical engineering Interconnector cell 021001 nanoscience & nanotechnology Copper 0104 chemical sciences Power (physics) solar cell chemistry Photovoltaik solar module Systeme und Zuverlässigkeit 0210 nano-technology business |
| Popis: | This work presents an interconnection approach for 6” back-contact back-junction (BC-BJ) solar cells by using conventional solder-coated copper ribbons with implemented wave structures for thermomechanical stress relief. We developed a process for production and advanced mechanical and electrical characterization for these interconnectors. In our study, mechanical stress is reduced up to 96.6 % (for ribbons) and up to 81 % (for wires) compared to non-structured interconnectors. In electrical terms, the relative effective resistance of the interconnector is increased by 3.1 % (for ribbons) and by 6.4 % (for wires). In general both, ribbons and wires, are suitable for the interconnection of 6” BC-BJ solar cells. A 4-cell module with 19.94 % efficiency in a standard module setup with 21.09 % - 21.18 % 6” BC-BJ ZEBRA cells (CTM power = -3.8 %) is manufactured. For interconnection 8 modified ribbons (1.5 x 0.2 mm²) are used on the rear side. The cells feature a multilayer metallization with a low temperature paste. The module passes TC-200 according to IEC 61215 without degradation. Our cost analysis shows that such a stress relief structure can be realized with additional material costs of lower than 0.2 € for a 60 cell full size module. |
| Databáze: | OpenAIRE |
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