Considerations how to tackle the Battery Capacity Competition of EV's

Marc Sens･Alexander Fandakov･Oliver Nolte･Adalbert Wolany (IAV)･Christoph Koehler (IAV)

Battery size is crucial for electric vehicles, affecting range and cost. The article explores technologies to reduce battery size and cost, avoiding the race for larger batteries. It assesses the impact of charging infrastructure and high-performance charging on battery capacity. Efficiency considerations, such as thermal management and using waste energy, are evaluated to reduce electrical consumption. Additionally, the influence of new battery chemistries and technologies on energy consumption and fast charging cycles is discussed. The goal is to find solutions that optimize battery use without compromising vehicle performance or increasing costs.

SOP Accelerator for battery development with smart testing approach

Dr. Johannes Werfel･Dr. Maria Kalogirou･Markus Straesser･Dr. Joerg Mueller (IAV)

The presentation introduces a new development method at IAV using enhanced battery simulation throughout the V-process. It comprehensively models physicochemical aspects of battery cells, including thermoelectric and mechanical properties of the batteries and their modules. This allows early analytical evaluation of layouts during concept development. Aging predictions optimize mechanics of battery and cells to meet lifetime requirements, reducing validation efforts through simulation-based decision-making. The method achieves significant savings of 20-30% across the development process, with potential for further improvement. This methodology approach has been used and validated during different development projects and sample phases successfully.

Advanced Methodologies for Safe Abusive Testing and Post-Mortem Analysis of Batteries

Francesc Miralles･Marc Ingles (IDIADA)

Abuse testing of energy storage system prototypes requires advanced methodologies for safe operation and handling of the samples. Key results of the analysis provide insights regarding performance under extreme circumstances and generates structured data to understand the thermal behaviour of batteries. Post-mortem analysis of the tested samples requires working on batteries in critical conditions. The working methodology ensures correct identification of the battery status to minimize personnel risk and enabling more precise results. Depending on the determined status, different approaches using systematic methods can be followed to carry out the disassembly and analysis of the damages occurred during the test.

Modelling Thermal Runaway with Gas Generation and Venting Dynamics in Lithium-ion Battery Pouch Cells

Andreas Podias･Steven Wilkins (TNO Netherlands Organisation for Applied Scientific Research, Mobility & Built Environment Unit, Powertrains Department)

In this work a comprehensive, experimentally validated, model is developed to simulate thermal runaway (TR) and venting in lithium-ion pouch cells, with NMC-based cathode, where TR is initiated by external heating. It is based on a coupled electrical-thermal previous model that included the initial energy input, the chemical decomposition processes of the anode, cathode and the electrical energy released by an internal short circuit and currently extended to include gas generation, internal pressure and venting dynamics. The model captures key features of TR, such as temperature evolution and temperature change rate, internal pressure changes and venting. Its findings are expected to support the foundation for future research dedicated on improving battery safety.