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Photonics West: TRUMPF TruHeat VCSEL heating systems make battery production more sustainable

High energy efficiency with TruHeat VCSEL heating modules for battery foil drying // Next generation of innovative VCSEL technology supports lower power densities // Improved battery manufacturing process and product quality with VCSEL heating systems thanks to direct heat transmission // Live demonstration of TruHeat VCSEL heating modules for area heating and e-mobility

Ulm/San Francisco, January 29, 2024 – TRUMPF Photonic Components, a global leader in VCSEL solutions for industrial laser heat treatment, is showcasing its latest TruHeat VCSEL product developments for area heating and e-mobility applications at Photonics West 2024 in San Francisco, USA. The VCSEL-based laser heating systems offer direct, homogeneous and zone-controllable heat treatment for industrial processes. “One example that we will showcase is our next generation of TruHeat VCSEL systems for battery foil drying, offering even higher efficiency and supporting lower power densities,” said Ralph Gudde, Vice President of Marketing and Sales at TRUMPF Photonic Components. “High process quality due to homogeneous heating and illumination zone control, fast processing, a small footprint and lower CO2 emissions are the benefits that our customers get,” added Gudde.

Novel TruHeat VCSEL laser heating systems for battery foil drying applications

The drying of electrode coatings is a delicate process and consumes most of the energy in Li-ion battery manufacturing due to the use of very large and inefficient convection ovens. Laser drying offers several advantages, like improved energy efficiency, reduced floor space and increased process control. Therefore, TRUMPF developed the TruHeat VCSEL laser heating systems to enable the homogeneous drying of very large surfaces with relatively low power densities. TruHeat VCSEL laser heating systems are based on the latest generation multi-junction VCSEL arrays, and the heating system is optimized for thermal design with highly efficient driver electronics. The wavelength of 980nm is strongly absorbed by all battery electrode materials and therefore supports the high drying efficiency.


The TruHeat VCSEL laser heating systems have a modular design with separate zones. This enables the tight control of individual illumination zones to support not only optimal homogeneity but also the customization of intensity profiles, for example, a lower or higher intensity at the edges of the coating.

Visit TRUMPF Photonic Components at Photonics West 2024, Booth 833


Digital photographs in print-ready resolution are available to illustrate this press release. They may only be used for editorial purposes. Use is free of charge when credit is given as “Photo: TRUMPF”. Graphic editing – except for cropping the main subject – is prohibited. Additional photos can be accessed at the TRUMPF Media Pool.

Picture 1

TruHeat VCSEL heating solutions from TRUMPF for Li-battery manufacturing enable more efficient production in various process steps. © TRUMPF  

Picture 2

The VCSEL diodes that are used in the VCSEL heating systems are manufactured in the clean room facility at the headquarters of TRUMPF Photonic Components in Ulm. The assembly of the heating modules is done in the Customer Application Center in Aachen. © TRUMPF  

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At the process step for battery foil drying, VCSEL heating systems efficiently dry the active material on the electrode without nearly any energy loss, thanks to their direct heat treatment. © TRUMPF  

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High-power infrared VCSEL heating systems provide scalable power and can be regulated precisely. © TRUMPF  

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Christian Wegner
Marketing Communications
Christian Wegner, TRUMPF Photonic Components
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