Measuring Instruments for Characterization of Intermediate Products in Electrode Manufacturing of Lithium‐Ion Batteries

Electrode manufacturing is considered the core of lithium‐ion battery cell production, with irreversible impacts on the electrochemical performance of the battery cell. The process chain is extensively complex, with a high number of interrelated parameters. The characterization of intermediate products in electrode manufacturing and the analysis of the correlations between process parameters and product properties can be considered a rigorous starting point to deepen process understanding and accelerate process optimization. Based on a holistic evaluation approach and a market analysis, this article provides a comprehensive overview of possible measuring instruments for intermediate products in electrode manufacturing, including the investment costs and inline/offline measurement strategy. The results can be used as a guideline for possible measuring instruments in electrode manufacturing, providing the foundation for in‐depth process analysis. The findings demonstrate the current possibilities and highlight the need for further technological advancement in the field of metrology and digitalization. Electrode manufacturing has an irreversible impact on battery cell performance. The characterization of intermediate products at this stage, in combination with an in‐depth understanding of the processes and the underlying interdependencies, can enable early fault detection and corrective action. To this end, this article provides a comprehensive overview of possible measuring instruments for the characterization of intermediate products in electrode manufacturing.