Thermal Behaviour Investigation of a Large and High Power Lithium Iron Phosphate Cylindrical Cell

Energies

Odile Capron¹  Ahmadou Samba²  Noshin Omar²  Peter Van Den Bossche²  Joeri Van Mierlo² 

[1] MOBI—Mobility, Logistics and Automotive Technology Research Centre, Vrije Universiteit Brussel, Pleinlaan, 2, 1050 Brussels, Belgium;

关键词: thermal;    lithium iron phosphate (LFP);    battery cell;    electrochemical-thermal;   

DOI  :  10.3390/en80910017

来源: mdpi

【 摘 要 】

This paper investigates the thermal behaviour of a large lithium iron phosphate (LFP) battery cell based on its electrochemical-thermal modelling for the predictions of its temperature evolution and distribution during both charge and discharge processes. The electrochemical-thermal modelling of the cell is performed for two cell geometry approaches: homogeneous (the internal region is considered as a single region) and discrete (the internal region is split into smaller regions for each layer inside the cell). The experimental measurements and the predictions of the cell surface temperature achieved with the simulations for both approaches are in good agreement with 1.5 C compared to the longitudinal direction, which is caused by the lower thermal conductivity of the cell in the radial compared to the longitudinal direction. During its discharge, the reversible, the ohmic and the reaction heat generations inside the cell reach up to 2 W, 7 W and 17 W respectively. From the comparison of the two modelling approaches, this paper establishes that the homogeneous modelling of the cell internal region is suitable for the study of a single cylindrical cell and is appropriate for the two-dimensional thermal behaviour investigation of a battery module made of multiple cells.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.