Thesis Defense - Halil Zınar Düzgün (MSME)

Halil Zınar Düzgün – M.Sc. Mechanical Engineering

Asst. Prof. Polat Şendur – Advisor

Date: 26.04.2022

Time: 11:00

Location: AB1 412

DURABILITY TESTING AND VIBRATION CHARACTERIZATION OF AN ELECTRIC VEHICLE BATTERY

Thesis Committee:

Asst. Prof. Polat  Şendur, Özyeğin University

Asst. Prof.  Ramazan Ünal, Özyeğin University

Assoc.  Prof.  Ali Çınar, MEF University

Abstract:

Although the electrical system is important in the development of electric vehicles, the durability of the battery against mechanical loads and the performance of the battery against shock reactions are just as important. The objective of this study is to investigate the structural life of the battery of the C-platform sports utility vehicle (SUV). For this purpose, a power spectral density (PSD) durability test profile is generated and compared to battery test standards such as ISO 6469:2019, AK-LH 5.21, and SAE J2380. Analytical Virtual Proving Ground (VPG), a multibody dynamics simulation model, is also developed and correlated to test data. The results show that fatigue damage spectrum (FDS) values for AK-LH is higher than the fatigue damage of the collected vehicle data, while the FDS results for ISO standard are lower compared to the vehicle data. The results also indicate that the loads in the longitudinal (x-direction) and lateral (y-direction) directions are different, and therefore loads with different amplitudes should be used for these directions. Finally, it is concluded that the VPG model can be used for determining the fatigue life when there is no test data, thanks to its high accuracy.

Bio: 

Halil Zınar Düzgün graduated from Hacettepe University with an Automotive Engineering degree in 2016. After graduation, he worked for S-T Engineering, Ford Otosan A.Ş. and TOGG. His main area of research interest is on Durability Road Load Data Engineering. He is proficient with Multibody Dynamic analysis like Virtual Proving Ground Analysis and Time Waveform Replication Analysis for heavy commercial vehicles and passenger cars. Besides, he has been involved with road load data collection, where he created different durability test profiles like electromechanical shakers and hydraulic test systems for different types of vehicle projects. Furthermore, he also has experience in customer correlation studies for vehicle level durability tests.