Study of the Effect of Confinement on Thermal Runaway and Its Propagation

Thermal runaway (TR) is a major challenge in the development and safety of Li-ion batteries, especially for electric vehicles. When a cell experiences TR, it releases heat rapidly, posing risks of explosion and propagation to adjacent cells. This complex phenomenon, influenced by material chemistry, charge state, and mechanical constraints, is not yet fully understood. Controlling TR is thus key for safer and more efficient battery design.
We offer a PhD thesis to characterize and understand TR propagation in a mini-module of pouch cells. The goal is to develop experimental tools to analyze mechanical confinement's influence on TR and study propagation mechanisms. Laboratory experiments, conducted with the support of an experienced technician, will allow in-depth analysis.
The candidate will have access to our advanced laboratories, including a thermal runaway chamber with optical access for detailed propagation studies. In-house fabrication of custom pouch cells will enable sensor integration for better characterization. The results will bridge scientific gaps and validate simulation models, paving the way for safer battery designs.

Keywords: Thermal runaway / Li-ion batteries / Pouch cells / Mechanical confinement / Optical diagnostics / Laboratory experimentation

• Academic supervisor    Dr Marc Bellenoue, Pprime Institute,  ORCID 0000-0001-9983-5777  
• Doctoral School    651 MIMME, Université de Poitiers
• IFPEN supervisor    Dr Michele BARDI, michele.bardi@ifpen.fr , ORCID 0000-0002-6482-3634 & Dr Matthieu LECOMPTE, matthieu.lecompte@ifpen.fr 
• PhD location    75% IFPEN, Rueil Malmaison, France /25% Institut Pprime, Poitiers
• Duration and start date    3-year position starting in the last quarter of 2025
• Employer    IFPEN
• Academic requirements    Master's degree or equivalent in Physical Sciences / Mechanical Engineering
• Language requirements    Anglais level B2 (CECR)
• Other requirements    
  • Expertise in battery systems, particularly thermal runaway and its mechanisms.
  • Knowledge of thermal phenomena and heat transfer.
  • Laboratory work and instrumentation experience.
  • Experience in optical diagnostics would be a plus.

To apply, please send your cover letter and CV to the IFPEN supervisor indicated here below.