20.500.12556/RUL-170695 Določitev optimalnega tokovnega protokola za parametrizacijo modela litij-ionskih baterij za oceno napolnjenosti Determination of the optimal current profile for parameterization of a lithium-ion battery model for state of charge estimation Stanje napolnjenosti (SoC) litij-ionske baterije je ključna informacija za njeno učinkovito uporabo, vendar je ni mogoče meriti neposredno. V ta namen so bili razviti baterijski modeli, na podlagi uporabe nadomestnih vezji, za simulacijo dogajanja v bateriji. Ti modeli za ustrezno prikazovanje odziva baterije na tokovne spremembe zahtevajo natančno parametrizacijo električnih komponent modela. To omogoči, da komponente s svojimi lastnostmi zajamejo vse kompleksne procese, ki se odvijajo v bateriji. V tej nalogi smo preverili kako uspešno različne oblike tokovnih protokolov zagotovijo optimalno parametrizacijo DP (ang. dual-polarization) modela. Izvedli smo eksperimentalne meritve, pri katerih smo litij-ionsko baterijo obremenjevali z različnimi tokovnimi profili in spremljali napetostni odziv baterije. Nato smo izvedli parametrizacijo modela in pridobljene parametre uporabili za simulacijo na validacijskem protokolu za namen primerljivosti. Izkazalo se je, da je najboljše parametre proizvedla kvadratna oblika tokovnih protokolov, še posebaj protokoli s premori med pulzi. The state of charge (SoC) of a lithium-ion battery is a crucial parameter for its efficient use, yet it cannot be measured directly. For this reason, battery models based on equivalent electrical circuits have been developed to simulate the internal behavior of the battery. To accurately reflect the battery’s response to current variations, these models require precise parameterization of their electrical components. Proper parameterization ensures that the components capture the complex electrochemical processes occurring within the battery. In this thesis, we evaluated how effectively different current profile shapes enable optimal parameterization of a DP (dual-polarization) battery model. We conducted experimental measurements by applying various current profiles to a lithium-ion battery and recording its voltage response. The acquired data was then used for model parameterization, and the resulting parameters were applied in a validation simulation to assess performance. The results showed that the most accurate parameters were obtained using square-wave current profiles, especially those with rest periods between current pulses. litij-ionske baterije modeli nadomestnih vezij tokovni protokoli parametrizacija stanje napolnjenosti lithium-ion battery equivalent circuit models current protocols parametrization state-of-charge true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-07-13 07:30:06 2025-07-13 07:30:12 2025-08-04 10:14:29 0000-00-00 00:00:00 2025 0 0 XI, 29 f. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.35:544.643.076.2:546.34(043.2) 271463 244707331 39415.pdf 39415.pdf 1 58232E162EB2CB180B969ADF49372D35 e485b193d69a1fead679f11ecfcaa4ea9a77c18b919de4418c7d12917fe6510b 858969a7-5fa8-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=212739 Fakulteta za strojništvo 0 0 0