Evaluation of Dynamic Mechanical Loading as an Accelerated Test Method for Ribbon Fatigue

29th European Photovoltaic Solar Energy Conference and Exhibition; 2484-2489 : Dynamic Mechanical Loading (DML) of photovoltaic modules is explored as a route to quickly fatigue copper interconnect ribbons. Results indicate that most of the interconnect ribbons may be strained through module mechani...

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Bibliographic Details
Main Authors: Bosco, N., Silverman, T., Wohlgemuth, J., Kurtz, S.R., Inoue, M., Sakurai, K., Shioda, T., Zenkoh, H., Hirota, K., Miyashita, M., Tanahashi, T., Suzuki, S., Chen, Y., Verlinden, P.J.
Format: Text
Language:English
Published: WIP 2014
Subjects:
OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS from Cells to Systems
PV Modules
DML
Online Access:https://dx.doi.org/10.4229/eupvsec20142014-5do.11.2
http://www.eupvsec-proceedings.com/proceedings?paper=28407
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Summary:29th European Photovoltaic Solar Energy Conference and Exhibition; 2484-2489 : Dynamic Mechanical Loading (DML) of photovoltaic modules is explored as a route to quickly fatigue copper interconnect ribbons. Results indicate that most of the interconnect ribbons may be strained through module mechanical loading to a level that will result in failure in a few hundred to thousands of cycles. Considering the speed at which DML may be applied, this translates into a few hours of testing. To evaluate the equivalence of DML to thermal cycling, parallel tests were conducted with thermal cycling. Preliminary analysis suggests that one ±1 kPa DML cycle is roughly equivalent to one standard accelerated thermal cycle and approximately 175 of these cycles are equivalent to a 25-year exposure in Golden Colorado for the mechanism of module ribbon fatigue.

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