The Effect on Aerodynamic Performance of Electric Vehicle Caused by Battery Pack Installed in the Chassis

Abstract

In view of the effect of the power battery pack installed in the classis of the electric vehicle on aerodynamic performance, take the SAE-B model as object. Using the computational fluid dynamics numerical simulation method, the effect of battery pack on the flow field of the vehicle structure and the effect rule on aerodynamic performance of electric vehicles caused by the size of battery pack were studied. Results showed that the battery pack installed in the chassis caused the change of the flow field at the chassis and tail of the vehicle. With the increase of battery pack width, drag coefficient is increased and lift coefficient is reduced. The size of battery pack would change the pneumatic resistance of vehicle. This is a reference for the optimization on aerodynamic performance of electric vehicle and the selection on the size of battery pack.