Evaluating Impedance Results of Lithium-Ion Batteries by DRT

The EMPIR-Project LiB4SecUse (Lithium Batteries for Second Use) develops impedance spectroscopy based techniques for the prediction of the state-of-health (SOH) of Lithium-Ion Batteries to asses their usability in second life applications. The Distribution of relaxation times (DRT) technique allows detailled interpretation of the spectra of Lithium-Ion batteries and is there-fore a promissing approach for fast […]

Traceability: Connecting process and product characteristics in continuous electrode production

The basis for the performance of the battery cell is already laid during production. Therefore, detailed knowledge of the interaction between process parameters and (intermediate) product characteristics is indispensable. In order to bring these data into a usable context, each value (discrete or continuous) must be uniquely assigned, depending on the type of process, also […]

Development and investigation of a simultaneous double-sided coating process

In the future, electricity storage systems will become an increasingly important aspect of the energy industry, especially for the upcoming e-mobility and for everyday use. Due to their properties such as high-energy density, high-power density and in addition high cycle stability, lithium-ion batteries (LIB) are regarded as the basis for electrification. LIBs are manufactured in […]

Laser assisted Ultrasonic Welding and Wire Bonding for EV related Applications

As a connection material, copper has some relevant advantages over aluminum, proven in power electronics applications. Because of the dissimilar material properties, ultrasonic welding parameters of copper differ significantly from those of aluminum. Most significantly, ultrasonic power and normal force are higher. In battery pack applications, normal force and/or vibration amplitude are limited by the […]

Solvent free manufacture of ultra-thick high-energy cathodes for LIB

Ultra-thick cathodes produced in a dry process, without the use of the toxic solvent NMP, can provide the solution for several problems limiting the competitiveness of LIB so far. In the electrode manufacturing, the very high costs for material, drying and recovery process and work safety can be saved. Furthermore, the production of solvent-free and […]


The increasing demand for high quality batteries require the development of highly efficient and fast processing tools – like LASER – for a faster and greener battery manufacturing process. To develop these laser-based processes, Fraunhofer ILT has set up a modular research platform. Different laser-processing tools can be implemented into a continuous battery electrode production […]

Holistic design of flexible lithium-ion pouch cells – Project AgiloBat

Lithium-ion batteries are well established as energy storage devices for a wide range of mobile applications from cell phones to electric vehicles. Depending on the purpose of use, very different requirements are expected of the battery system. Present battery production is mainly focused on the fabrication of great numbers of uniform rectangular cells, which are […]