20.500.12556/RUL-171362 Modeliranje vpliva mehanskih napetosti na električno napetost in impedanco litij ionske baterijske celice Modeling the impact of mechanical stresses on the voltage output and impedance of a lithium-ion battery cell V magistrskem delu je raziskan vpliv mehanskih napetostnih polj na elektrokemijski odziv litij-ionskih baterij. Razvit je mehanski model, ki inovativno nadgrajuje DFN elektrokemijski model v PyBaMM okolju in sklaplja procese na ravni delcev in elektrode. Z modelom smo prvič sposobni celostno obravnavati vpliv mehanskih napetosti na simulirane rezultate elektrokemijske impedančne spektroskopije in inkrementalne analize kapacitete. Rezultati kažejo, da mehanske napetosti pospešujejo difuzijo litija v aktivnem materialu in izboljšujejo kinetiko medfaznih reakcij na stiku z elektrolitom, medtem ko znižujejo kemijski potencial in generirajo dodatne prenapetosti v baterijski celici. The master's thesis investigates the influence of mechanical stress on the electrochemical response of lithium-ion batteries by innovatively extending the DFN electrochemical model within the PyBaMM environment with a mechanical model that couples phenomena at both the particle and electrode levels. With this model, we are able to comprehensively address the influence of mechanical stresses on simulated results of electrochemical impedance spectroscopy and incremental capacitance analysis for the first time. The results show that mechanical stress accelerates lithium diffusion in the active material and enhances the kinetics of interfacial reactions at the electrolyte interface, while simultaneously lowering the chemical potential and generating additional overpotentials in the battery cell. litij-ionske baterije numerične simulacije DFN model mehanske napetosti elektrokemijska impedančna spektroskopija inkrementalna analiza kapacitete lithium-ion batteries numerical simulations DFN model mechanical stress electrochemical impedance spectroscopy incremental capacity analysis true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-08-23 08:32:10 2025-08-23 08:32:11 2025-09-24 13:47:05 0000-00-00 00:00:00 2025 0 0 XXVII, 107 str. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.876.5:669.884:621.352(043.2) 274657 250230275 42995.pdf 42995.pdf 1 8DF2DCBE0613EB45B1CDB70430BF8313 dd5a21cefad60464cd5c2fc28dfdf8850d7e3b3497c122acaf11507d1cb73525 cab4f51c-7fea-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=214649 Fakulteta za strojništvo 0 0 0