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

Odile Capron, Ahmadou Samba, Noshin Omar, Peter Van Den Bossche and Joeri Van Mierlo
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Odile Capron: MOBI—Mobility, Logistics and Automotive Technology Research Centre, Vrije Universiteit Brussel, Pleinlaan, 2, 1050 Brussels, Belgium
Ahmadou Samba: MOBI—Mobility, Logistics and Automotive Technology Research Centre, Vrije Universiteit Brussel, Pleinlaan, 2, 1050 Brussels, Belgium
Noshin Omar: MOBI—Mobility, Logistics and Automotive Technology Research Centre, Vrije Universiteit Brussel, Pleinlaan, 2, 1050 Brussels, Belgium
Peter Van Den Bossche: MOBI—Mobility, Logistics and Automotive Technology Research Centre, Vrije Universiteit Brussel, Pleinlaan, 2, 1050 Brussels, Belgium
Joeri Van Mierlo: MOBI—Mobility, Logistics and Automotive Technology Research Centre, Vrije Universiteit Brussel, Pleinlaan, 2, 1050 Brussels, Belgium

Energies, 2015, vol. 8, issue 9, 1-26

Abstract: 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 maximum root mean square error. From the results, the maximum cell surface temperature and temperature gradient between the internal and the surface regions are around 31.3 °C and 1.6 °C. The temperature gradient in the radial direction is observed to be greater about 1.1 °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.

Keywords: thermal; lithium iron phosphate (LFP); battery cell; electrochemical-thermal (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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