TALK    On computer simulation of multiscale processes in porous electrodes of Li-ion batteries

Date & Time:

Friday, May 13, 2016; 12:00 PM

Abstract:

Li-ion batteries are widely used in automotive industry, in electronic devices, etc. In this talk we will discuss challenges related to the multiscale nature of batteries, mainly the understanding of processes in the porous electrodes at pore scale and at macroscale. A software tool for simulation of isothermal and non-isothermal electrochemical processes in porous electrodes will be presented. The pore scale simulations are done on 3D images of porous electrodes, or on computer generated 3D microstructures, which have the same characterization as real porous electrodes. Finite Volume and Finite Element algorithms for the highly nonlinear problems describing processes at pore level will be shortly presented. Model order reduction, MOR, empirical interpolation method, EIM-MOR algorithms for acceleration of the computations will be discussed, as well as the reduced basis method for studying parameters dependent problems. Next, homogenization of the equations describing the electrochemical processes at the pore scale will be presented, and the results will be compared to the engineering approach based on Newman's 1D+1D model. Simulations at battery cell level will also be addressed. Finally, the challenges in modeling and simulation of degradation processes in the battery will be discussed and our first simulation results in this area will be presented.

This is joint work with A.Latz (DLR), M.Taralov, V.Taralova, J.Zausch, S.Zhang from Fraunhofer ITWM, Y.Maday from LJLL, Paris 6 and Y.Efendiev from Texas A&M.

Speaker:

Oleg Iliev
Fraunhofer Institute for Industrial Mathematics, ITWM

Senior Scientist in Fraunhofer Institute for Industrial Mathematics (ITWM); APL Professor in Dept. of Mathematics, Technical University of Kaiserslautern. Dr. Iliev holds a PhD in Computational Mathematics from Moscow State University since 1987 (supervisors Acad. Samarskii and Prof. Vabishchevich).

Dr.Iliev's competences are in the areas of developing algorithms for multiscale and multiphysics problems
- modeling and simulation of multiscale and multiphysics industrial problems
- porous media research
- developing algorithms and computer simulation of flow problems related to industrial filtration processes, fractionation, heat exchangers, etc.

Dr. Iliev has lead / is leading a number of public projects (funding from DFG, BMBF, BMWi, KAUST, EU) as well as a number of projects funded directly from the industry. Dr. Iliev has published more than 100 papers in mathematical and engineering journals and proceedings. He has supervised and co-supervised more than 20 PhD students and he was mentoring about 10 postdocs in various areas of Applied Mathematics. Dr.Iliev is a Co-Founder and former President of the International Society for Porous Media, InterPore, currently he serves as a Chair of the Event Committee of InterPore.

Research Area:

Dynamical Systems