A Computationally Efficient Coupled Electrochemical-Thermal Model for Large Format Cylindrical Lithium Ion Batteries
Artikel i vetenskaplig tidskrift, 2019

We present a one-dimensional, radial, coupled degradation-electrochemical-thermal (DET) model of a large format cylindrical lithium ion cell. The model consists of reduced order equations that describe the electrochemical phenomena, including that associated with degradation, coupled with an approximate model of thermal behavior. The reduced order electrochemical model, which is approximated from the pseudo-two-dimensional (P2D) electrochemical model using a Padé approximation method, computes the variation of electrochemical variables and heat generation terms. Simultaneously, a coupled thermal model computes the temperature distribution in the radial direction of the cell. The results from DET model compare favorably to those obtained from solving the 1D radial coupled degradation-electrochemical-thermal partial differential equations in COMSOL Multiphysics, however the DET model returns these results in significantly reduced computational times. Importantly, the model capability in providing insightful information of cell degradation and temperature in a computationally efficient manner paves the way for the health-conscious, real-time optimal control of large format cylindrical cells.

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)

Journal of the Electrochemical Society

0013-4651 (ISSN)

Vol. 166 13 A3059-A3071

Ämneskategorier

Oorganisk kemi

Energiteknik

Annan elektroteknik och elektronik

Styrkeområden

Energi

DOI

10.1149/2.1241913jes

Mer information

Senast uppdaterat

2020-11-04