A comparison of the thermal and electrical properties of two different battery cells

OpenAlex İngilizce

In this study, the electrothermal properties of NMC and LFP cells of equal nominal capacity were investigated under constant current and dynamic current profile conditions performed at vehicle level. Experimental studies have been conducted to investigate the effects of current and temperature on battery cells with different chemistries. It has been determined that the parameters of both cells can be analysed with a maximum relative error of approximately 2.5 % under constant current conditions using a numerical model. Furthermore, using the developed ECM-based mathematical model, the performance of two cells with different chemistries was investigated at the vehicle level under driving cycle conditions. The results demonstrated that the NMC cell provided approximately 9 % more power, with an increase in SOC of 3 % at the conclusion of the WLTP driving cycle. It was determined that this contributed to an increase in vehicle range. The heat generation values during the cycle were found to be 2.48 W and 2.34 W for the LFP and NMC cell, respectively. Consequently, the utilization of NMC cells is recommended when evaluating cell performance at the vehicle level, as they exhibit superior electrical parameters and facilitate the implementation of simpler BTMS designs owing to their lower thermal loads.