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Vibracijsko utrujanje baterijskih celic
ID Žlebnik, Gašper (Author), ID Slavič, Janko (Mentor) More about this mentor... This link opens in a new window, ID Katrašnik, Tomaž (Comentor)

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Abstract
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.

Language:Slovenian
Keywords:vibracijsko utrujanje, baterijske celice, LFP celice, stresalnik, tip 18650, lastne frekvence
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Place of publishing:Ljubljana
Publisher:[G. Žlebnik]
Year:2023
PID:20.500.12556/RUL-147117 This link opens in a new window
UDC:534:620.178.3:621.352(043.2)
COBISS.SI-ID:156698883 This link opens in a new window
Publication date in RUL:23.06.2023
Views:1125
Downloads:85
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Secondary language

Language:English
Title:Vibration fatigue of battery cells
Abstract:
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.

Keywords:vibration fatigue, battery cells, LFP cells, shaker, type 18650, natural frequencies

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