Techniques in-operando pour la surveillance des batteries et la prévention des problèmes de sécurité
Résumé
Performance and safety monitoring of the batteries is of major importance for most of applications. However, present methods of battery monitoring embedded in the Battery Management Systems (BMS) are usually only based on temperature and electrochemical parameters measurements (cell voltage, applied current, Coulomb counting…). Thus, they do not provide relevant enough information to detect the mild signs of improper operation that could lead to irreversible degradation of the performance and even safety issues.
To address this fact, we considered the use of acoustic methods and thermal analysis as relevant characterization techniques for an advanced monitoring of the batteries that could allow improving the BMS to optimize use of the battery, increase their life cycle and prevent safety issues.
Acoustic characterization and thermal analysis techniques are evaluated as non-electrochemical, non- invasive and in-operando methods to complete the usual electrochemical monitoring of batteries. The main objective is to detect subtle materials and interfaces changes during operation and aging. First, experimental setups are defined for different commercial-type batteries characterization. Then, we evaluate the ability (and limitations) of these techniques to determine different status indicators such as the State of Charge (SoC) during usual operation, State of Health (SoH) related to aging mechanisms, and the State of Safety (SoS) with the possibility to prevent safety issues by detecting the early warning signs of damaging during abusive operation (thermal runaway, overcharge and over-discharge …).
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)