Presentation of the research theme
With the growth of electric and hybrid vehicles, renewable sources and recovery devices, the reliability of the energy storage system must be controlled to ensure performance and operational safety throughout the ageing process associated with use. Estimating its lifespan also aims to make the most of the material resources that are available. Modelling of degradation mechanisms and failure modes plays an essential role, but for each new battery technology, for example, still requires long and costly tests for the detailed characterisation of cells in new condition and for accelerated ageing tests. Our aim is therefore to shorten this characterisation phase for modelling so that the simulation can actually be used in an iterative procedure for the complete design of a storage system before it is produced. This approach is based on the implementation of a high-performance model reproducing the mechanical, electrical and thermal behaviour of the elementary cell as it ages. It is accompanied by relevant proposals for methods of accurate determination of load and health states as well as life expectancy.
