
Speira, a leading aluminium rolling and recycling company with operating facilities in Germany and Norway has published a white paper on the joint concept study with the Chair of Production Engineering of E-Mobility Components at RWTH Aachen University, an elite German public research university located in Aachen, North Rhine-Westphalia.

The study eyes on the thermal management of cylindrical lithium-ion battery cells (LIB) in 4680 format, due to LIB developers and car manufacturers are aiming further to increase the energy and power density as well as the safety of LIBs, while at the same time shifting charging rates towards conventional refuelling times. Against this background, the study partners investigated whether the significantly better thermal conductivity of aluminium compared to steel offers advantages in cooling, among other things.
As part of the concept study, cell housing for a cylindrical LIB cell is made from aluminium compared to a commonly used housing made from nickel-plated steel (NPS). The material used for the cell housing was Speira's rolled material ION Cell, characterised by a high recycled content.
Overall, the simulation shows a clear advantage in thermal management for battery cells with aluminium cell housings compared to housing made from NPS. These offer manufacturers of electric vehicles both new opportunities for conserving resources and increasing energy efficiency. At the same time, ION Cell fulfils all relevant specifications as the material for the cell housing.
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