Dr Carlos Ziebert’s team, of the Karlsruhe Institute of Technology (KIT), explores the safety of batteries across calorimetric studies. The group Batteries – Calorimetry and Safety focuses on calorimetric studies and safety tests on lithium­ion cells and post­lithium cells. For this purpose, depending on the cell size and application, different types of calorimeters are used in Europe’s largest Battery Calorimeter Laboratory, which was established in 2011. The group is currently active in four different public funded projects: AnaLiBa, BatgaMod, HELIOS and POLiS. HELIOS In the European project HELIOS (High­ pErformance moduLar battery packs for sustaInable urban electrOmobility Services), which is funded by around 10 million Euro and has started at the 01.01.2021, improved modular battery packs are developed together with the following 18 partners from Europe and Turkey under the lead of Aarhus university. Applying a holistic circular approach, the HELIOS project investigates optimal eco­designs and advanced processes to both enhance and demonstrate innovative, lighter and eco­friendly hybrid Li­Ion­based battery packs for mid­size vehicles and city buses.