A physical approach to Electrochemical Storage System multi-scale modeling: Electrochemical Double Layer Capacitors (as case studies)

摘要

Optimal sizing of energy storage components requires powerful modeling tools to save development time and money. At IFP Energies nouvelles, an integrated modeling approach of electrical storage systems is under development to address the definition of the vehicle architecture on the one hand, based on lumped parameter models, and the organ sizing on the other hand, requiring multidimensional modeling. This multi-scale ESS modeling approach accounting for the physical phenomena occurring within seconds to hours is presented in the paper, applied to supercapacitors as case studies. Indeed, EDLC coupled with batteries can be used in vehicles to absorb high power demands and prevent the battery from strong thermal solicitations and premature ageing. A 0D electrical-thermal dynamic model which can be used in vehicle system modeling to size electrical power performances is presented and validated towards experiments performed on commercial 3500F cells. This lumped parameter model is then coupled with a 3D finite element model of commercial supercapacitors pack to check thermal issues as the system absorbs or supplies power. The prediction for cells and connectors temperature correlated well with test data on an instrumented EDLC pack EVS25 Copyright.