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@article{1597157,
author = {Vališ, David and Nováček, Ondřej and Hasilová, Kamila and Leuchter, Jan},
article_location = {Oxford},
article_number = {DEC},
doi = {http://dx.doi.org/10.1016/j.engfailanal.2017.04.019},
keywords = {Degradation; Diffusion process; Failures; First hitting time; Probability; Reliability analysis; Supercapacitor; Trajectory analysis},
language = {eng},
issn = {1350-6307},
journal = {Engineering Failure Analysis},
title = {Modelling of degradation and a soft failure moment during the operation of a supercapacitor applying selected diffusion processes},
url = {https://www.sciencedirect.com/science/article/pii/S1350630716310111},
volume = {82},
year = {2017}
}
TY - JOUR
ID - 1597157
AU - Vališ, David - Nováček, Ondřej - Hasilová, Kamila - Leuchter, Jan
PY - 2017
TI - Modelling of degradation and a soft failure moment during the operation of a supercapacitor applying selected diffusion processes
JF - Engineering Failure Analysis
VL - 82
IS - DEC
SP - 566-582
EP - 566-582
PB - Pergamon-Elsevier Science Ltd
SN - 13506307
KW - Degradation
KW - Diffusion process
KW - Failures
KW - First hitting time
KW - Probability
KW - Reliability analysis
KW - Supercapacitor
KW - Trajectory analysis
UR - https://www.sciencedirect.com/science/article/pii/S1350630716310111
L2 - https://www.sciencedirect.com/science/article/pii/S1350630716310111
N2 - An important requirement imposed on storage batteries nowadays is to have sufficient capacity. At the same time a high level of availability, reliability and safety is required as well. Our intention is to determine a capacity degradation threshold and the moment the soft failure of a graphite supercapacitor (SC) occurs. If we do not take into account the idle state, the functioning of the supercapacitor might be expressed by charging and discharging processes under different operating conditions given by the allowed extent of SC design. When looking for the degradation threshold and the moment of soft failure occurrence we performed the experimental part of measuring in the climatic chamber. We performed and recorded the processes of SC charges and discharges at different temperatures: 40 degrees C, 25 degrees C and -42 degrees C and at different charging and discharging currents: 2A, 4A, 6A and 8A. The experimental results were used to model mathematically the SC discharge process. Appropriate tools used for SC discharge are diffusion processes. In this case we apply a Wiener process with drift and an Ito process.
ER -
VALIŠ, David, Ondřej NOVÁČEK, Kamila HASILOVÁ a Jan LEUCHTER. Modelling of degradation and a soft failure moment during the operation of a supercapacitor applying selected diffusion processes. \textit{Engineering Failure Analysis}. Oxford: Pergamon-Elsevier Science Ltd, 2017, roč.~82, DEC, s.~566-582. ISSN~1350-6307. Dostupné z: https://dx.doi.org/10.1016/j.engfailanal.2017.04.019.
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