Sensors & transducers
MEASUREMENT TECHNOLOGY FOR THE BATTERIES OF TOMORROW
M 16
odern battery technologies play a central role in numerous fields of application, from electric vehicles and energy storage
systems to mobile devices such as smartphones. With the increasing focus on sustainability and electrification, the importance of batteries continues to grow. A high precision production process is essential to meet this demand and to keep the quality, performance and cost- effectiveness of batteries at the highest level. State-of-the-art sensor technology from Micro- Epsilon is used to optimise the individual production processes and maximise quality. Micro-Epsilon offers high precision solutions for numerous applications in battery production. These range from individual sensors to complete sensor systems, from inline thickness measurement and precise machine monitoring to 3D surface inspection. The sensors are used by leading battery manufacturers and automotive companies around the world and impress with their high precision and reliability in both series and OEM applications. The sensor signals can be calculated, evaluated and analysed using turnkey solutions.
In battery production, high precision is essential to meet the high quality and performance requirements. Battery manufacturers are using inline thickness measurement systems, machine monitoring and 3D surface inspection systems to optimise processes and maximise quality, says Glenn Wedgbrow, business development manager at Micro-Epsilon UK.
MORE PRECISION IN BATTERY PRODUCTION
Sensors and systems from Micro-Epsilon are used in highly automated processes in all production stages including anodes and cathodes, separators and active material. They measure with high precision during coating, calendering, assembly and forming. Micro- Epsilon offers numerous solutions for electrode film coating lines in particular. The sensor systems are used for both wet and dry coating processes. Coated copper film can be monitored in the same way as aluminium film. Process- critical parameters are the coating thickness, the thickness of the films, web edge position and coil unwinding, as well as the monitoring of the coating application at the edges.
THICKNESS MEASUREMENT OF BATTERY FILM
The thicknessCONTROL measuring system from Micro-Epsilon is used for high precision inline
thickness measurement of coated battery film and impresses with long-term stable measurements. It consists of one or two robust measuring frames, each of which can be equipped with up to four thickness measuring tracks according to customer requirements. This allows up to eight thickness measurement channels in one measuring system and results in much greater coverage and detection of thickness variations across the web width. The sensors are based on the confocal chromatic measuring method and are evaluated and synchronised via a multi-channel controller. A patented linearisation of the individual measuring tracks achieves sub-micrometer measurement accuracies.
Capacitive sensors have also proven themselves in the inline thickness measurement of battery film. These have a larger measuring spot, which means inhomogeneous structures can be compensated for via the area integration of the sensor. In addition, the capacitive sensors can also be used at high process temperatures
May 2025 Instrumentation Monthly
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