Inspection of electrodes in battery production using a multi-channel photonic terahertz radar

Shiva Mohammadzadeh; Andreas Keil; Raphael Hussung; Lauri Maximilian Schwenson; Lars Liebermeister; Robert Kohlhaas; Fabian Friederich

doi:10.1117/12.3017467

18 June 2024 Inspection of electrodes in battery production using a multi-channel photonic terahertz radar

Shiva Mohammadzadeh, Andreas Keil, Raphael Hussung, Lauri Maximilian Schwenson, Lars Liebermeister, Robert Kohlhaas, Fabian Friederich

Author Affiliations +

Proceedings Volume PC12994, Terahertz Photonics III; PC129940G (2024) https://doi.org/10.1117/12.3017467
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Terahertz non-destructive testing offers a highly attractive solution for inline testing of electrode thicknesses in battery production for electric vehicles. Measuring systems with high spectral bandwidths are required to address the thin layers of typically less than 100 μm. In addition, multiple measuring heads are desired at different location on a production line to ensure adequate control at high throughput. We solve this by means of a highly scalable photonic terahertz radar. Its measuring principle is based on frequency-modulated continuous wave technology in conjunction with two-color laser radiation. The number of measuring heads can be easily scaled through the use of laser amplifiers. Another advantage of a photonic continuous wave system is the simple possibility of distributing fiber-coupled measuring heads over long fiber lengths of even more than 100 m. In this article, we show the potential of the system concept by the implementation of an 8-channel system and demonstration of relevant thickness measurements.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Shiva Mohammadzadeh, Andreas Keil, Raphael Hussung, Lauri Maximilian Schwenson, Lars Liebermeister, Robert Kohlhaas, and Fabian Friederich "Inspection of electrodes in battery production using a multi-channel photonic terahertz radar", Proc. SPIE PC12994, Terahertz Photonics III, PC129940G (18 June 2024); https://doi.org/10.1117/12.3017467

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