Dr.-Ing.

Albrecht, Stefan

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  • Publication
    Switchable Heat Pipes for Eco-Friendly Battery Cooling in Electric Vehicles: A Life Cycle Assessment
    ( 2024-02-17)
    Illner, Maike orcid-logo
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    Thüsing, Kai
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    Nioac de Salles, Ana Claudia orcid-logo
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    Trettenhann, Anian orcid-logo
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    Albrecht, Stefan orcid-logo
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    Winkler, Markus
    Battery thermal management systems (BTMSs) ensure that lithium-ion batteries (LIBs) in electric vehicles (EVs) are operated in an optimal temperature range to achieve high performance and reduce risks. A conventional BTMS operates either as an active system that uses forced air, water or immersion cooling, or as a complete passive system without any temperature control. Passive systems function without any active energy supply and are therefore economically and environmentally advantageous. However, today’s passive BTMSs have limited cooling performance, which additionally cannot be controlled. To overcome this issue, an innovative BTMS approach based on heat pipes with an integrated thermal switch, developed by the Fraunhofer Cluster of Excellence Programmable Materials (CPM), is presented in this paper. The suggested BTMS consists of switchable heat pipes which couple a passive fin-based cold plate with the battery cells. In cold state, the battery is insulated. If the switching temperature is reached, the heat pipes start working and conduct the battery heat to the cold plate where it is dissipated. The environmental benefits of this novel BTMS approach were then analysed with a Life Cycle Assessment (LCA). Here, a comparison is made between the suggested passive and an active BTMS. For the passive system, significantly lower environmental impacts were observed in nearly all impact categories assessed. It was identified as a technically promising and environmentally friendly approach for battery cooling in EVs of the compact class. Furthermore, the results show that passive BTMS in general are superior from an environmental point of view, due their energy self-sufficient nature
  • Publication
    Ressourceneffizienzpotenziale von Innovationen in rohstoffnahen Produktionsprozessen
    ( 2012)
    Albrecht, Stefan orcid-logo
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    Bollhöfer, Esther
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    Brandstetter, Christian Peter
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    Fröhling, Magnus
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    Mattes, Katharina
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    Ostertag, Katrin orcid-logo
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    Peuckert, Jan
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    Seitz, Ralph
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    Trippe, Frederik
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    Woidasky, Jörg
    Ressourceneffizienz ist ein zentrales Element der Sicherung der industriellen Produktion in Deutschland und Europa und gleichzeitig eine wichtige Strategie zur Steigerung der Nachhaltigkeit. Umfangreiche Forschungsanstrengungen werden derzeit unternommen, um ressourceneffiziente Produktionsverfahren zu entwickeln und in der industriellen Praxis zu etablieren. Der Beitrag nimmt basierend auf einem Förderschwerpunkt des deutschen Bundesministeriums für Bildung und Forschung eine erste qualitative Einordnung der Ressourceneffizienzpotenziale vor, die mit ausgewählten aktuellen technologischen Entwicklungen im Bereich rohstoffintensiver Produktionsprozesse verbunden sind. An einem Branchenbeispiel werden die erwarteten Einsparpotenziale hinsichtlich kumuliertem Materialaufwand, Primärenergiebedarf und Treibhauspotenzial quantifiziert. Ergänzend werden ausgewählte Herausforderungen der Umsetzung dieser ressourceneffizienten Verfahrensinnovationen beleuchtet.