Fizikalno-kemijsko konsistentno nadomestno vezje za modeliranje Li-ionskih baterij

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Matevž Cimermančič (Author), Tomaž Katrašnik (Mentor)

Abstract

V magistrskem delu smo raziskali delovanje litij-ionskih baterij s ciljem analize napovedovalnosti in sposobnosti enolične parametrizacije inovativnega fizikalno-kemijsko konsistentnega nadomestnega vezja, ki smo ga implementirali v programskem okolju Python. Na podlagi simulacijskih rezultatov smo izvedli analizo napačnosti napovedovanja napetostnega odziva baterijske celice implementiranega numeričnega modela napram laboratorijskim meritvam zastavljenih protokolov polnjenja in praznjenja. Nato smo model numerično validirali z ozirom na enolično določljivost modelskih parametrov. Rezultati kažejo, da ima model odlične sposobnosti prileganja simulacijskih in merjenih vrednosti napetosti, ravno tako pa ima tudi dobre ekstrapolacijske lastnosti. Ena ključnih prednosti analiziranega modela pred obstoječimi modeli je sledenje potencialu vsaki izmed elektrod posebej.

Keywords

magistrske naloge;elektromobilnost;litij-ionske baterije;modeliranje;nadomestno vezje;napovedovanje stanja napolnjenosti;simulacije;

Data

Language:	Slovenian
Year of publishing:	2023
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[M. Cimermančič]
UDC:	621.352:621.3.049:004.925.8(043.2)
COBISS:	167923459
Views:	62
Downloads:	15
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	A physico-chemical consistent equivalent circuit for modeling Li-ion batteries
Secondary abstract:	In master thesis we investigated the performance of lithium-ion batteries with the aim of analysing the predictability and the ability to uniquely parameterise an innovative physicochemical equivalent circuit, which we implemented in the Python. Based on the simulation results, we performed an analysis of the accuracy of the battery cell voltage response prediction of the implemented numerical model against laboratory measurements of the set charging and discharging protocols. The model was then numerically validated with respect to the uniqueness of the model parameters. The results show that the model has excellent fitting abilities to the simulated and measured voltage values, as well as good extrapolation properties. One of the key advantages of the model analysed here over existing models is that the potential of each electrode is tracked separately.
Secondary keywords:	master thesis;electromobility;lithium-ion bateries;modeling;equivalent circuit;state-of-charge prediction;simulations;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. Ljubljana, Fak. za strojništvo
Pages:	XX, 78 str.
ID:	19872166