Določitev optimalnega tokovnega protokola za parametrizacijo modela litij-ionskih baterij za oceno napolnjenosti

zaključna naloga Univerzitetnega študijskega programa I. stopnje Strojništvo - Razvojno raziskovalni program

Mirjam Ogrinc (Author), Klemen Zelič (Mentor)

Abstract

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.

Keywords

diplomske naloge;litij-ionske baterije;modeli nadomestnih vezij;tokovni protokoli;parametrizacija;stanje napolnjenosti;

Data

Language:	Slovenian
Year of publishing:	2025
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[M. Ogrinc]
UDC:	621.35:544.643.076.2:546.34(043.2)
COBISS:	244707331
Views:	130
Downloads:	86
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Determination of the optimal current profile for parameterization of a lithium-ion battery model for state of charge estimation
Secondary abstract:	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.
Secondary keywords:	thesis;lithium-ion battery;equivalent circuit models;current protocols;parametrization;state-of-charge;
Type (COBISS):	Final paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Fak. za strojništvo
Pages:	XI, 29 f.
ID:	26809108