Battery Lifetime – Oversizing vs. Enhanced diagnostics

Venice 28th – 31st March 2023 Round Table Discussion “Battery Lifetime – Oversizing vs. Enhanced diagnostics” organized by Stephan Bihn, M.Sc. Center for Ageing, Reliability and Lifetime Prediction of Electrochemical and Power Electronic Systems, Aachen stephan.bihn@isea.rwth-aachen.de and Prof. Diego Iannuzzi, University of Naples Federico II, Italy, diego.iannuzzi@unina.it

If an application has to work for a guaranteed lifespan, the battery can be crucial to meeting this requirement. One technical approach to meet the wanted lifetime of the system can be a simple oversizing of the battery. With this approach, the necessary energy and power are useable, even if the battery is at 80 % of its initial capacity or has a higher internal resistance due to aging.

A different and more complex approach is a reasonable determination of the battery’s internal states to influence the operation strategy to extend the system’s lifetime.

Estimating those states with high precision can offer the possibility to use the battery with less safety margin and thus allow more usable capacity.

At this round-table discussion, we want to discuss the pros and cons of those two approaches, the possibilities novel technologies can offer, and the requirements of different applications.