Abstract
In this paper, a testing methodology for ageing quantification of supercapacitors (SC) for Hybrid Electric Vehicles (HEV) applications is investigated. In order to ensure optimal performances during the whole vehicle lifetime, the reliability of the SC must be quantified. Thus, accelerated ageing modes based on both calendar life tests and power cycling tests have been investigated and the performances degradation of the SC is quantified using periodic and online characterization for different test conditions. Hence, we discuss the end-of-test criteria using a new representation based on the evolution of the capacitance loss with the increase of the equivalent series resistance.
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