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InTenZ – Intensive post-drying of components for lithium ion cells in discontinuous drying ovens

Funded by: AiF

Contact person : Fabienne Huttner

The manufacturing of Lithium-ion batteries (LIBs) includes a lot of complex process steps and is subjected to various internal and external influences. Therefore, highly reproducible manufacturing processes and stringent quality controls are required to meet the increasing standards and performance requirements. Concerning this matter, moisture represents a quite critical contamination, as the cell performance of LIBs is significantly influenced by the residual moisture content of the cell components. Beside impairing their performance, moisture in battery cells can lead to cell degradation, for example. It can also hinder the formation of an effective Solid Electrolyte Interface, which is needed to protect the active material from direct contact with the electrolyte. Hence, electrodes and separators for Lithium-ion batteries need to be post-dried directly prior the cell assembly to reduce the moisture content in the cells below a critical level. .

Project description:

Although the step of post-drying has a significant influence on safety and cell performance, there is still little research about post-drying in general and the influence of type and intensity of post-drying. In this project, the material- and energy-saving post-drying of entire coils is considered. With regard to design and layout of the post-drying process, numerous questions arise from which the scientific-technical and economic challenges of this research project can be derived.
The project addresses the challenges of post-drying of electrode and separator coils in vacuum drying ovens through systematic experimental and theoretical investigations of heat and mass transfer with the aim of

  • designing and constructing vacuum drying ovens in the best possible way
  • predicting the post-drying process with maximum efficiency in terms of time and energy consumption depending on electrode structure and winding geometry
  • predicting the effect of post-drying on electrode properties and residual moisture as a function of dry room conditions

    Karlsruher Institut für Technologie (KIT) – Institut für Thermische Verfahrenstechnik, Bereich Thin Film Technology (TFT),
    Hochschule Landshut – Technologiezentrum Energie (TZE), Fakultät Maschinenbau

    Team Members


    Cooperative project: Project results database and communication management for the battery cell production cluster ProZell (EMKoZell) more

    BaSS – BatterieSicherheitsStandardisierung more

    eKoZell – Environmental and Cost Assessment, Model and Communication Management for the Competence Cluster ProZell – Accompanying Project to the ProZell Cluster (eKoZell) moremore

    Cooperative project: Project results database and communication management for the battery cell production cluster ProZell (EMKoZell) more

    EVOLi²S – Evaluation of the technical and economic advantages of the open-cell module for lithium-ion and lithium-sulphur batteries with regard to stationary and mobile applications more

    Optimal electrode structure and density by design of mixing and calendering procedures (MiKal) more

    MultiDis – Multiscale approach for the description of carbon black deagglomeration in the dispersion process for a process and performance-optimized process control more

    ÖkoTroP – Ecologically gentle dry coating of battery electrodes with optimized electrode structure more

    PräLi – Prelithiation of electrodes more

    ProfiStruk – Process and system development for the process integrated inline structuring of Li-electrodes more

    Process modeling of the calendering of energy-rich electrodes (ProKal) more

    Roll-It more

    LiPlanet – Li-ion cell pilot lines network moremore

    LoCoTroP – Low cost dry coating of battery electrodes for energy efficient and environmentally friendly production processes more

    Sim4Pro- Digitalization Platform – Simulations for battery cell production more

    ZiLsicher – Zink-Air-Accumulators as safe electrochemical storage for low emission and explosion proof industrial applications more

    Finished Projects
    BenchBatt – Process based energy optimization and validation of Lithium-Ion and Lithium-Sulfur battery electrodes more

    GEENI – Graduate Program for Energy Storage and Electromobility more

    INSIDER – metal free Dual Ion energy storage technology utilizing anionic -intercalation more

    Academic Initiative for e-Mobility – Education and Training in the University Network MOBIL4e more

    ProLiEMo – Production Research for High-Power Lithium-Ion Batteries for Electro Mobility  mehr

    Functional Materials and Material Analysis for High Power Lithium-Ion Batteries more

    LithoRec – LithoRec – Recycling of Lithium Ion Batteries mehr