T-Cell: Thermal Battery Dummy Resumption Period 2024

Autoren

Dipl.-Ing. R. Lorbeck, Institut für Thermodynamik und nachhaltige Antriebssysteme, Technische Universität Graz

Jahr

2025

Druckinfo

Eigenproduktion ÖVK

Zusammenfassung

Battery testing requires extensive safety preparations and continuous monitoring of operating parameters to ensure smooth operations and avoid incidents like thermal runaways. Given the complexity and cost of handling tests before, during, and especially after the process, it is crucial to minimize these risks and costs while finding an alternative to conventional battery tests. This approach is being developed through the T-cell project at the Institute of Thermodynamics and Sustainable Propulsion Systems at Graz University of Technology.
A thermal substitution cell, which resembles a battery cell externally, aims to reflect the surface temperature distribution of a chemical cell without containing the cell chemistry inside. Instead, the interior is not part of the observation, and thermal requirements are provided by an internal heating option. This measurement approach requires a control and regulation unit to transfer the thermal behavior of a battery cell to the substitution cell. Together
with the cell's electronic structure and a battery simulation model, this control module simplifies investigations at the cell, module, and pack levels by replacing some cells using system symmetry advantages.
A suitable simulation model, based on electrochemical and thermal networks, was developed and parameterized for this purpose. The data, partially derived empirically and from real cell measurements in literature, were adapted to the simulation environment to simulate the real cell's thermal behavior. The simulation results represent the current state of the model, which is continuously improved through measurements carried out at the institute.

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