Bernd Rosemann

Lithium-ion batteries are major drivers to decarbonize road traffic and electric power systems. With the rising number of electric vehicles comes an increasing number of lithium-ion batteries reaching their end of use. After their usage, several strategies, e.g., reuse, repurposing, remanufacturing, or material recycling can be applied. In this context, remanufacturing is the favored end-of-use strategy to enable a new use cycle of lithium-ion batteries and their components. The process of remanufacturing itself is the restoration of a used product to at least its original performance by disassembling, cleaning, sorting, reconditioning, and reassembling. Thereby, disassembly as the first step is a decisive process step, as it creates the foundation for all further steps in the process chain and significantly determines the economic feasibility of the remanufacturing process. The aim of the disassembly depth is the replacement of individual cells to replace the smallest possible deficient unit and not, as is currently the case, the entire battery module or even the entire battery system. Consequently, disassembly sequences are derived from a priority matrix, a disassembly graph is generated, and the obstacles to non-destructive cell replacement are analyzed for two lithium-ion traction battery systems, to analyze the distinctions between battery electric vehicle (BEV) and plug-in hybrid electric vehicle (PHEV) battery systems and identify the necessary tools and fundamental procedures required for the effective management of battery systems within the circular economy.

The Oak Processionary Moth (OPM) is a heat-loving moth native to the warmer regions of southern Europe, with an increasing range in central Europe. Its caterpillars, living in gregarious aggregations, can cause defoliation of infested trees. The OPM is of particular concern. Stinging hairs of its caterpillars can cause allergic reactions through the skin and respiratory tract. The hypothesis being discussed is that increasing warming caused by climate change favours the spread of thermophilic moths. The study is geographically focused on the Free State of Bavaria/Germany, where the pest first became known in the 1990s. Bavaria's natural forest communities historically contain a high proportion of broadleaved oaks. Because oaks thrive in warm, dry forest landscapes, they are in suspicion promoting the distribution of the OPM. Beside oaks are hosting the OPM, they offer hope for climate-adapted forest conversion because of their good climate resilience. The hypothesis is tested through a systematic study of the habitat characteristics of OPM habitats by matching factors influencing population dynamics with time series of geographically referenced population data. The analysis precedes an extensive literature review and uses OPM population and climate science time series. The results provide fitting data to support the hypothesis. Population dynamics show a high correlation with climate warming parameters, but global warming is not the only factor. The implications for OPM population trends summarise and complement the current state of knowledge and provide a strong rationale for more in-depth research into scenarios for future population trends using geo-databased climate projections, forest history, site and silvicultural data to provide a assured assessment for the long-term success of the 'oak tree' under the threat of increasing infestation by the Oak Processionary Moth.

Die Nutzung von Druckluft in der Automatisierungstechnik bietet eine Reihe von Vorteilen. Druckluft ist vielseitig nutzbar, sauber und speicherbar. Außerdem bewegt sie große Lasten und hilft präzise zu positionieren. Dennoch gibt es einen Nachteil: Die Drucklufterzeugung ist energie- und kostenintensiv. Lediglich circa sieben Prozent der eingesetzten elektrischen Energie sind als mechanische Expansionsarbeit nutzbar. Anwender sind daher gut beraten, Druckluftverluste zu vermeiden und sich auf die Suche nach autonomen und prozesssicheren Überwachungslösungen zu machen. Der Beitrag beschreibt die Entwicklung und Anwendung einer kennzahlbasierten Analyse zur Erfassung, Auswertung und Überwachung von Druckluftverlusten am Beispiel automatisierter Produktionsprozesse im Karosseriebau.