The dynamic equalization approach can significantly increase the use of electric vehicle second-life batteries in stationary applications. Dynamic equalization aims to face the very high variability of the capacity values of the second-life battery cells that strongly reduces the battery usable capacity. This work proposes an alternative dynamic equalization architecture based on an auxiliary cell to support the less-performing cells, maximizing the battery usable capacity. A theoretical methodology has been presented to analyze the proposed architecture. The obtained preliminary theoretical results are then validated using a simulation platform. The final results show a potential increase in usable battery energy of up to 16 % using an ideal DC/DC converter, and 13 % with a DC/DC converter efficiency of 0.8.
A Dynamic Equalization Topology Based on Auxiliary Cell: Theoretical and Simulative Analyses
Martino, Michele;Di Rienzo, Roberto;Verani, Alessandro;Baronti, Federico;Roncella, Roberto;Saletti, Roberto
2024-01-01
Abstract
The dynamic equalization approach can significantly increase the use of electric vehicle second-life batteries in stationary applications. Dynamic equalization aims to face the very high variability of the capacity values of the second-life battery cells that strongly reduces the battery usable capacity. This work proposes an alternative dynamic equalization architecture based on an auxiliary cell to support the less-performing cells, maximizing the battery usable capacity. A theoretical methodology has been presented to analyze the proposed architecture. The obtained preliminary theoretical results are then validated using a simulation platform. The final results show a potential increase in usable battery energy of up to 16 % using an ideal DC/DC converter, and 13 % with a DC/DC converter efficiency of 0.8.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
