The sustainable use of high-voltage batteries (HV batteries) is a key challenge in electric mobility. While these energy storage systems continuously lose capacity during vehicle operation, they still retain significant residual potential after their primary use. Targeted condition assessment and second-life utilization can extend their service life and conserve resources. Our research focus addresses innovative methods for the analysis, classification, and reuse of used batteries in order to enable a sustainable value chain.

• Battery condition assessment as a key to second-life use

To make a well-founded decision between second-life utilization and recycling, a precise assessment of battery health (State of Health, SOH) is essential. This requires fast and reliable analysis methods that combine computer-based simulations with practical testing. The goal is to develop a universal rapid test system that can be used in laboratories, workshops, and recycling facilities. In parallel, cloud-based solutions for storing and evaluating diagnostic data are being developed to enable efficient data analysis and informed decision-making.

• Second-life batteries as stationary energy storage systems

The reuse of end-of-life electric vehicle batteries as stationary energy storage systems is another focus of our research. Such systems can be used for peak shaving, grid stabilization, or optimization of self-consumption. To ensure the safe and efficient operation of second-life batteries, advanced battery management systems (BMS) are required to provide reliable monitoring and control. Within our research activities, testing methods, classification strategies, and system optimizations are developed to integrate second-life batteries economically and safely into private and industrial applications.

• Sustainable value creation and circular economy

A central aspect of our research is the promotion of a circular economy for energy storage systems. The targeted reuse of HV batteries not only reduces environmental impact but also improves the overall sustainability of electric mobility. In addition, our research provides insights into safe and standardized transport and recycling infrastructures to enable efficient and environmentally friendly battery processing.

• Research for the future of battery systems

Our interdisciplinary research approach combines engineering sciences, IT solutions, and economic analyses. In collaboration with partners from industry and academia, we develop innovative technologies and decision-making models that enable the sustainable and efficient use of battery storage systems. The findings from our projects make a valuable contribution to the further development of electric mobility and to the optimization of energy storage solutions for a climate-friendly future.