20.500.12556/RUL-147117 Vibracijsko utrujanje baterijskih celic Vibration fatigue of battery cells Po pregledu literature smo pripravili eksperimentalno progo in načrt meritev za testiranje vpliva vibracijskega utrujanja na kapaciteto LFP celic. Preverili smo še lastne frekvence sistema z utežmi. Vpetje za par celic smo oblikovali tako, da smo prisilili vzbujanje v prvi upogibni modalni obliki. Meritve smo izvajali pri različnih amplitudah pospeškov vzbujanja, kontrolirali smo še kapaciteto celice, ki ni bila vzbujana. Dodatno smo pripravili poenostavljen 3D model za analizo mehanskega napetostnega stanja celice. Rezultati so pokazali opazen vpliv vibracij tako na maksimalno, kot tudi obdržano kapaciteto. Napetostni model je pokazal mehansko napetostno stanje celice. After reading through the relevant field literature, we setup the experimental site and prepared the measurement plans for testing the effect of vibration fatigue on LFP cell capacity. We also checked the natural frequencies of the system with added weights. The cell fixture was constructed in a way to force the first bending modal shape. The test was done at different acceleration amplitudes and we had an extra control cell. Additionally, we prepared a simplified 3D model to analyse the mechanical stress state of the cell. Results showed a visible effect of vibration fatigue on both the maximum capacity and kept capacity throughout the test. The stress model displayed the mechanical stress state inside the cell. vibracijsko utrujanje baterijske celice LFP celice stresalnik tip 18650 lastne frekvence vibration fatigue battery cells LFP cells shaker type 18650 natural frequencies true false false [G. Žlebnik] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-06-23 08:31:06 2023-06-23 08:31:08 2023-10-18 08:50:19 0000-00-00 00:00:00 2023 0 Ljubljana 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 534:620.178.3:621.352(043.2) 250322 156698883 23368.pdf 23368.pdf 1 051DE936527C26B20BF1E7A1E6B2E1C7 6b2d59f6efa6610f6865aa797b5ea589d37c6f213bd20ed7f3bd1d416911cfd9 2906f47c-118f-11ee-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=170506 Fakulteta za strojništvo 0 0 0