Motivation and procedure
Currently available battery cells require complex peripherals for thermal management, especially for applications with high specific powers. The aim of this project is to develop a battery cell that can be integrated into high-performance applications with significantly less effort. To this end, various active and inactive components of the energy storage device are optimized for their thermal stability. The result is a next-generation lithium-ion battery cell that can be operated at significantly higher temperatures and whose integration into the overall system requires fewer peripheral components and complexity. In this way, new fields of application are to be developed in which strong cooling is not possible for technical or economic reasons. The project focuses on the stability of the lithium-ion battery cell at elevated temperatures and its technical and economic feasibility.
In this research project several working goals are defined: The most thermally sensitive cell components, the electrolyte and the separator, are optimized step by step and designed for high-temperature applications. Variations in the contacting of the battery cell as well as the positioning of the current arresters are also investigated with regard to the thermal influence.
For this purpose, single-layer laboratory pouch cells will be constructed and their behavior at high temperatures investigated. Commercially available systems will also be compared. Following the load tests, the laboratory cells are opened and the components analyzed in the post-mortem laboratory. Building on this, the integration of the optimized materials into a full cell will be investigated. Both cylindrical cells and pouch cells are produced with the identified materials. In addition, the influence of the geometry on the heat dissipation of the cells will be validated. Especially for the thermal coupling to active and passive cooling peripherals, the geometry of the current arresters is of decisive importance. The solutions developed will also be compared economically with currently available cooling concepts and battery technologies.
Research and project partners
- EAS Germany GmbH (Project Coordinator)
- ISEA - Institute for Power Electronics and Electrical Drives of RWTH Aachen University
- PEM - Chair of Production Engineering of E-Mobility Components at RWTH Aachen University
- MEET- Münster Electrochemical Energy Technology Research Center of WWU Münster
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01.01.2018 – 31.12.2020
Federal Ministry of Education and Research (BMBF)
Project Management Jülich (PtJ) | Forschungszentrum Jülich GmbH