• Ansys Simulation
• Battery Safety
• CFD Simulation
• Electric Aviation
• FR-CFRP Materials
• Heat Transfer
• Li-ion cells
• Multiphysics Simulation
• Thermal Runaway
• Vented Gases

This thesis addresses the critical challenge of simulating and mitigating thermal runaway (TR) in lithium-ion batteries, with a focus on applications in aeronautical systems. As the aviation industry transitions toward electric propulsion, ensuring battery safety under extreme conditions is paramount. The work develops a simplified thermo-fluid dynamic model to predict temperature and pressure evolution during TR events, validated through experimental tests and numerical simulations using Ansys Fluent and Transient Thermal modules.

The model emphasizes gas dynamics, analyzing turbulent flow and heat transfer during TR, while accounting for chemical reactions and gas species released (e.g. H₂, CO, CH₄). Key parameters such as gas pressure, temperature distribution and heat generation are estimated to guide material selection and battery pack design. Experimental setups with cylindrical 21700 cells (100% SOC) under TR conditions provided validation data, revealing critical insights into flame behavior, gas venting and heat dissipation.

Despite its simplified approach, the model provides a computationally efficient framework for preliminary design, ensuring compliance with aeronautical safety standards. Future research directions include integrating chemical reaction kinetics, extending simulations to multi-cell configurations and validating structural deformations under TR-induced pressures. These advancements aim to enhance the model's accuracy and applicability, enabling practical solutions such as venting system optimization, thermal propagation analysis and structural integrity assessments of bonded joints in battery packs.