Abstract
Two kinds of innovative measurement method of EDLC's equivalent circuit constants are presented in this paper, “simplified energy method” and “charge-energy method”. The measurement principle of the former method is the same as that of the previously reported “energy method”, but the procedure is much more simplified by employing an analytical approach. In addition to energy, electric charge is incorporated into the latter one to estimate an internal resistance analytically using a simultaneous equation regarding energy and charge. Through the verification with the constant current charge-discharge experiments, we confirmed that both of the proposed measurement methods are concise, highly accurate and reliable.
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