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On some model reduction approaches for simulations of processes in Li-ion battery

: Iliev, Oleg; Latz, Arnulf; Zausch, Jochen; Zhang, Shiquan

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Handlovičová, A. ; Slovak University of Technology -STU-, Faculty of Civil Engineering, Bratislava:
Algorithmy 2012, 19th Conference on Scientific Computing. Proceedings of contributed papers and posters. Online resource : Vysoké Tatry, Podbanské, Slovakia, September 9 - 14, 2012
Bratislava: Slovak University of Technology, 2012
ISBN: 978-80-227-3742-5
Conference on Scientific Computing (Algorithmy) <19, 2012, Podbanské/Slovakia>
Conference Paper, Electronic Publication
Fraunhofer ITWM ()
Pseudo-2D model; Li-ion battery; model order reduction; proper orthogonal decomposition; fractional time step; model reformulation

In this work, some model reduction approaches for performing simulations with a pseudo-2D model of Li-ion battery are presented. A full pseudo-2D model of processes in Li-ion batteries is presented following [1], and three methods to reduce the order of the full model are considered. These are: i) directly reduce the model order using proper orthogonal decomposition, ii) using fractional time step discretization in order to solve the equations in decoupled way, and iii) reformulation approaches for the diffusion in the solid phase. Combinations of above methods are also considered. Results from numerical simulations are presented, and the efficiency and the accuracy of the model reduction approaches are discussed.