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GranuGoIn

Granulate-based Semi-Dry Electrode Production Goes Industry

Funded by: BMBF

Runtime: 01.01.2025 – 31.12.2027

Contact persons: Niclas Hornischer, Finn Reinkensmeyer

 

Summary of the project:

Conventional electrode production for lithium-ion batteries (LIB) uses an extrusion process with low solid content and subsequent die coating. This is associated with long dwell times during drying, which account for a significant share of the energy consumption and consequently also the costs during LIB production. The granulate-based semi-dry electrode manufacturing process therefore offers an opportunity to significantly reduce production costs, while at the same time optimizing product quality through the greatly increased storage stability of the granulates, so that a temporal and spatial decoupling of the starting material production (improved flexibility) is made possible.

The objective of the GranuGoIn project is to further develop the semi-dry electrode production process for industrial application in both anode and cathode production. The semi-dry electrode production process developed in the GranuProd project will be further developed and transferred to new materials in order to realize an industry-oriented application. This requires scaling of the existing semi-dry electrode production process by adapting the process parameters during extrusion, further development of the coating process via granulate dosing and additional inline measurement technology for real-time quality assurance.  The cells from the semi-dry manufacturing process are compared with reference cells from conventional electrode production and the corresponding energy consumption during their manufacture and evaluated in terms of cell performance and cost-effectiveness.

 

Objectives and tasks:

  • Upscaling of the semi-dry electrode production process
  • Establishment of a dosing system for coating using a calender
  • Production of multi-lane and double-sided electrode coating
  • Establishment of inline data acquisition
  • Evaluation of battery cells in laboratory format
  • Economic and ecological balancing

Project Partners:

  • VARTA Microbattery GmbH
  • Coperion GmbH
  • associated partner: Armor Battery Films, Matthews International GmbH Department Saueressig Engineering, Coperion K-Tron Deutschland GmbH
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