In lithium-ion battery (LIB) production, limp electrodes are handled gently by vacuum-pressure based handling and transport systems, which generate a fluid flow that propagates through the porous electrode coating during handling. To investigate the limits and material-damaging behavior of vacuum pressure-based handling, it is required to understand how process parameters and electrode qualities affect fluid flow. Questions on how fluid flow reduces electrode quality are insufficiently addressed or modeled. Modeling the electrode and handling system interaction requires knowledge of the effective surface geometry and the volumetric flow rate caused by the pressure difference. In this article, flow through porous electrode coatings during handling is modeled. Experiments demonstrate a flow behavior according to the generalized Darcy’s law. Thus, using Darcy’s law, modeling fluid flow through the electrode improves the exploration of the limits and design of vacuum pressure-based handling and transport of electrodes in LIB production.
Lithium-Ionen Batterien (LIB) sind Schlüsselelemente der Elektromobilität und ein Hauptkostenfaktor für Elektrofahrzeuge. Mit einem steigenden Bedarf werden kostengünstige LIB zu einem Erfolgsfaktor der Elektromobilität. Vorgestellt wird ein flexibles Greifsystem für einen neuartigen Montageprozess zur produktivitätsgesteigerten Herstellung eines z-gefalteten Elektrode-Separator-Verbundes (ESV) einer LIB, bei dem der Separator als endloses Bandmaterial eine konstant hohe Vorschubgeschwindigkeit aufweist.
Lithium-ion batteries (LIB) are key components of electromobility and a major cost factor of electric vehicles. With a rising demand, affordable LIB become a success-factor for electromobility. A flexible gripping system for productivity increased assembling the z-folded electrode-separator-composite featuring a continuous separator feeding-speed is presented.
Das Handhaben von Elektrodenfolien ist ein entscheidender Prozessschritt bei der Montage von Batteriezellen. Aktuelle Verfahren zum Handhaben sind durch getaktete Pick-und-Place-Operationen gekennzeichnet. Ihre Produktivität ist dabei vom Bewegungsablauf mit den erforderlichen Rück- und Zustellbewegungen begrenzt. Vorgestellt wird das Konzept einer Bewegungseinrichtung für eine durchsatzgesteigerte Handhabung ohne Rück- und Zustellbewegungen sowie durch eine kontinuierliche Bewegung.
The handling of electrodes is an essential process step in the assembling of lithium-ion battery cells. Current methods for handling are characterized through pick-and-place operations. Their productivity is limited through the necessary setting and resetting movements. A concept of an apparatus for the handling of electrodes is introduced. Without setting and resetting movements as well as a continuous process flow, the productivity for handling electrodes can be significantly increased.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.