Influence of control strategies on battery/supercapacitor hybrid Energy Storage Systems for traction applications

The energy storage is key issue for traction applications like electric vehicles (EVs) or hybrid electric vehicles (HEVs). Indeed, it needs a higher power and energy density, a weak bulk and size, a long lifetime and a low cost. A hybrid energy storage system (ESS) using batteries and super capacitors, seems to be a good device to answer to these constraints. The objective of the paper is to study the influence of control strategies for this hybrid ESS. Indeed, according to the used strategy, this association can be more and less interesting compared to an ESS only composed of batteries. Three control strategies are proposed.