Zasnova hladilnega sistema baterijskega paketa dirkalnika Formule Student

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Urban Čufer (Author), Tomaž Katrašnik (Mentor)

Abstract

V magistrski nalogi je predstavljena zasnova hladilnega sistema za baterijski paket dirkalnika Formula Student. Ustrezna termoregulacija je namreč ključna za zagotavljanje varnosti in predvidene življenjske dobe baterijskih celic. Pri zasnovi smo upoštevali vse omejitve, določene v pravilniku tekmovanja, poleg tega pa smo želeli napraviti baterijski paket s čim manjšo maso in tako kar se da majhnim vplivom na vozno dinamiko vozila. Začeli smo z izračunom potrebne kapacitete baterijskega paketa in določitvijo ostalih izhodnih karakteristik ter na osnovi tega izbrali ustrezne baterijske celice. S simulacijo porabe moči, ki reprezentira vožnjo dirkalnika, smo opravili termalne meritve na celicah in glede na rezultate izbrali najustreznejšo. Na modelu hlajenja ene celice smo preliminarno določili potrebno odvedeno toploto in na podlagi tega izdelali 3D model celotnega baterijskega paketa. S simulacijami RDT smo v programu Fluent izvedli termalno simulacijo na modelu celotnega baterijskega paketa. Rezultati so pokazali, da hladilni sistem zagotavlja ustrezno hlajenje. Ker smo ugotovili, da se v določenem predelu paketa pojavljajo nekoliko višje temperature, smo podali napotke za izboljšavo sistema. Izvedli smo tudi eksperimentalno meritev temperatur na celicah med vožnjo in ugotovili, da se meritev ujema z rezultati računalniške simulacije in tako potrjuje model.

Keywords

magistrske naloge;hladilni sistemi baterijskega paketa;baterijski paket;baterijske celice;litij-ionske baterijske celice;računalniška dinamika tekočin;simulacije hlajenja;Formula Student;CFD simulacije;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[U. Čufer]
UDC:	621.313:004.925.84:532(043.2)
COBISS:	16917787
Views:	1626
Downloads:	370
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Design of a battery pack cooling system for a Formula Student race car
Secondary abstract:	This masterʼs thesis presents the design of a battery pack cooling system for a Formula Student race car. Proper thermal regulation of a battery pack is crucial to ensure the safety and achieving estimated life of the battery cells. It was ensured that design complies with all the restrictions determined by the competition rules. In addition, mass of the battery pack should be as low as possible to minimize the negative effect on vehicle dynamics. We started by calculating the required battery pack capacity and determined the other output characteristics. On this basis we selected battery cells which can fulfill specified requirements. To select appropriate cell, we made thermal measurements on the individual cell using a duty cycle that represents power consumption of a race car scaled to a single cell. Single cell cooling model was used to, determine the required cooling capacity and to provide an input to the 3D model of the battery pack, which were performed by means of CFD simulation in Fluent on the model of the entire battery pack. The results indicated that the cooling system provides sufficient cooling. We found that slightly higher temperatures occur in some areas of the battery pack and thus, we proposed guidelines for enhancing the system. Finally, we performed an experimental measurement of the temperatures on the cells. Measured temperatures match the results of the computer simulation and confirms our model.
Secondary keywords:	master thesis;battery pack cooling systems;battery pack;battery cells;lithium-ion battery cells;computational fluid dynamics;cooling simulations;Formula Student;CFD 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:	XXIV, 101 str.
ID:	11217804