A Padé Approximate Model of Lithium Ion Batteries
Artikel i vetenskaplig tidskrift, 2018

We present a reduced order model for a lithium ion battery in which Padé approximants are used to simplify complex, transcendental, transfer functions associated with the linearized, pseudo 2-dimensional (P2D) electrochemical model of the battery. The resulting transfer functions take the form of simple, rational polynomial functions, which can be used to compute any variable at any location within a one-dimensional representation of the battery domain. Corrections for nonlinear behavior are also incorporated into the reduced model. The results obtained using the reduced model compare favorably to those from the full (nonlinear) P2D model and the computational time required to produce these results is significantly reduced. Importantly, the form of the reduced model means that variables can be evaluated at specific discrete locations within the cell domain, without the need to compute all values of the variable at all discrete locations, as is the case with the spatial discretization methods most commonly used to implement the P2D model. We show that this results in further significant time savings and enhances the suitability of the model for variety of applications.

Författare

Ngoc Tham Tran

Queensland University of Technology (QUT)

Mahinda Vilathgamuwa

Queensland University of Technology (QUT)

Troy Farrell

Queensland University of Technology (QUT)

San Shing Choi

Queensland University of Technology (QUT)

Yang Li

Queensland University of Technology (QUT)

Joseph Teague

Queensland University of Technology (QUT)

Journal of the Electrochemical Society

0013-4651 (ISSN)

Vol. 165 7 A1409-A1421

Ämneskategorier

Oorganisk kemi

Energiteknik

Annan elektroteknik och elektronik

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

DOI

10.1149/2.0651807jes

Mer information

Senast uppdaterat

2020-11-06