Comparison of Battery Architecture Dependability

Christophe Savard (1) , Pascal Venet (1) , Eric Niel (1) , Laurent Pietrac (1) , Ali Sari (1)

1 MIS - Ampère, Département Méthodes pour l'Ingénierie des Systèmes

This paper presents various solutions for organizing an accumulator battery. It examines three different architectures: series-parallel, parallel-series and C3C architecture, which spread the cell output current flux to three other cells. Alternatively, to improve a several cell system reliability, it is possible to insert more cells than necessary and soliciting them less. Classical RAMS (Reliability, Availability, Maintainability, Safety) solutions can be deployed by adding redundant cells or by tolerating some cell failures. With more cells than necessary, it is also possible to choose active cells by a selection algorithm and place the others at rest. Each variant is simulated for the three architectures in order to determine the impact on battery-operative dependability, that is to say the duration of how long the battery complies specifications. To justify that the conventional RAMS solutions are not deployed to date, this article examines the influence on operative dependability. If the conventional variants allow to extend the moment before the battery stops to be operational, using an algorithm with a suitable optimization criterion further extend the battery mission time.

Domaines: Energie électrique

Christophe Savard, Pascal Venet, Eric Niel, Laurent Pietrac, Ali Sari. Comparison of Battery Architecture Dependability. Batteries, 2018, 4 (3), pp.31. ⟨10.3390/batteries4030031⟩. ⟨hal-01969239⟩