Detailed modeling and simulation of the 110V auxiliary train battery

The activity of my thesis work was MiL (Model-in-the-Loop). It consisted in modeling and simulating one of the train’s subsystems, specifically the 110V auxiliary battery. The work was developed using the MATLAB/Simulink toolchain. A preliminary study was carried out to understand the type of battery, its functionality, and the corresponding sizing. In Simulink, the battery modeling workflow was implemented: I started from the creation of a single cell up to the complete battery pack, accurately modeling the battery behavior according to the required usage profile. Thanks to the measurements taken from the real battery, the reconstruction of its actual behavior became more accurate and reliable. Moreover, MATLAB was useful for the parametrization of the Simulink blocks. Subsequently, I also used Simulink to create an integration environment, enabling the battery model to interface with the company’s software during the system integration phase. The results confirm the effectiveness of the model in reproducing the expected behavior under various operational conditions.