Influence of Initial Cell-to-Cell Variations, Different Self-Discharge and Aging Rates on the Utilization of Large Lithium-Ion Battery Packs

This thesis investigated how cell-to-cell variations, different self-discharge and aging rates influenced the voltage imbalance and subsequently the utilization of lithium-ion battery packs. Based on the experimental evaluation of self-discharge variations and presented holistic battery pack simulation framework, the results of this thesis suggest that the operation of battery systems far below the absolute maximum ratings most likely does not lead to a significant voltage imbalance.