The development of electric double layer capacitors (EDLCs) represents an important milestone for energy storage technologies of electronic assemblies. EDLCs have significantly higher energy densities when compared to conventional capacitors such as electrolytic and ceramic capacitors. When compared to batteries, EDLCs offer higher power densities and longer lifetimes. This has led to EDLCs being used to supplement lithium ion batteries in hybrid and electric vehicles as well as in applications such as kinetic energy recovery systems in automobiles. Applications such as these, among others, which could potentially expose EDLCs to harsh environmental conditions, necessitate the understanding of the failures of EDLCs from a reliability perspective. In this study, we use temperature and voltage step stress testing of EDLCs from several different manufactures to gain insight into the failure modes and mechanisms of these capacitors. The margins outside the rated conditions within which these components can be operated safely are also identified. This is achieved by systematically increasing the stress levels at which they are being tested. The results are also analyzed in light of the differences in construction between capacitors from different manufacturers.
Step Stress Testing of Electric Double Layer Capacitors
2014
16 Seiten, Bilder, Tabellen, 11 Quellen
Conference paper
English
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