Study of Battery Performance with Hardware in the Loop Simulation of High Power Working Vehicles

In electrified working vehicles applications, a great amount of power may be required both for traction and hydraulic tools leading to a completely new class of problems in terms of energy management. Moreover, due to the continuous high power demand, a deep knowledge of the battery behaviour is necessary and requires specific testing techniques. In this work, an initial characterization stage allowed for battery modelling and parameters identification. Then, the attention was focused on the power demand that the Energy Storage System (ESS) should provide in a real working vehicle application. Batteries may represent the weakest element of an electrified architecture if the ESS configuration does not properly fit manufacturer specifications. Thus, a Hardware-In-the-Loop (HIL) testing system was set up in order to study the battery power performance under real working conditions. Finally, results were compared to the numerical output in order to validate the battery model in dynamic load conditions.