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

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 o 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.
Authors:
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Publication Date:
OSTI Identifier:
1215009
Report Number(s):
NREL/CP-5J00-62596
Resource Type:
Conference
Resource Relation:
Conference: 29th European Photovoltaic Solar Energy Conference (EU PVSEC 2014), 22-26 September 2014, Amsterdam, The Netherlands
Research Org:
NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Contributing Orgs:
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan; Mitsui Chemical, Tokyo, Japan; Toray, Tokyo, Japan; Espec, Hudsonville, Michigan; State Key Laboratory of PV Science and Technology, Trina Solar, Changzhou, China
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE PHOTOVOLTAIC; MODULE; RELIABILITY; DYNAMIC MECHANICAL LOADING; THERMAL CYCLING; ACCELERATED TESTING