Fraunhofer Institute for Surface Engineering and Thin Films IST
First supervisor: Prof. Dr.-Ing. Christoph Herrmann, Fraunhofer Institute for Surface Engineering and Thin Films IST, christoph.herrmann(at)ist.fraunhofer.de
Second supervisor: Prof. Dr.-Ing. Petr Novák, Institute of Energy and Process Systems Engineering of TU Braunschweig
Ludwig Günther, Fraunhofer Institute for Surface Engineering and Thin Films IST, ludwig.guenther(at)ist.fraunhofer.de
Short project motivation:
Monitoring of the cell behavior is a crucial step for the early detection of critical states of a lithium battery. This project seeks to apply thin film sensor structures to lithium-ion batteries for force and temperature monitoring. Charging and discharging processes cause a variation in volume of the active materials in battery cells and lead to forces on the cell housing and the mounting structure of the cells. The objective is to include measurements of the force that a cell exerts on surrounding mechanical structures in the battery management system and the performance evaluation of battery cells made from virgin or recycled materials. Especially for the new generation of solid-state battery systems, precise measurements of the forces affecting the cell are expected to become even more important for determining the performance of a battery system. Together with extensive data mining this allows for a deeper understanding of the cell performance and an assessment of the ageing process of new and recycled materials.