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research-article

Coupled Numerical Approach for Automotive Battery Pack Lifetime Estimates with Thermal Management

[+] Author and Article Information
Ken Darcovich

National Research Council of Canada, Energy, Mining and Environment Portfolio, Ottawa, Ontario, Canada, K1A 0R6
ken.darcovich@nrc-cnrc.gc.ca

Dean MacNeil

National Research Council of Canada, Energy, Mining and Environment Portfolio, Ottawa, Ontario, Canada, K1A 0R6
Dean.MacNeil@nrc-cnrc.gc.ca

Steven Recoskie

National Research Council of Canada, Energy, Mining and Environment Portfolio, Ottawa, Ontario, Canada, K1A 0R6
Steven.Recoskie@nrc-cnrc.gc.ca

Quentin Cadic

ICAM-Toulouse, 75 avenue de Grande Bretagne, 31300 Toulouse, France
quentin.cadic@2016.icam.fr

Florin Ilinca

National Research Council of Canada, Automotive and Surface Transportation Portfolio, Boucherville, Québec, Canada, J4B 6Y4
Florin.Ilinca@cnrc-nrc.gc.ca

Ben Kenney

Dana Canada Corp., 656 Kerr St., Oakville, Ontario, Canada, L6K 3E4
ben.kenney@dana.com

1Corresponding author.

ASME doi:10.1115/1.4038631 History: Received October 18, 2016; Revised September 05, 2017

Abstract

This study combines an equivalent circuit approach for prismatic battery cells with the Single Particle Model (SPM) in order to model the thermal state of automotive battery packs. The objective here was to determine the effects of liquid cooling applied to the packs under standard driving cycles. The Kim model provided a means for determining a non-uniform current distribution over the surface of the current collectors. The Kim model is based on the application of Ohm's Law over a conducting medium, with empirical source terms representing current flowing into or out of an adjacent electrode layer. The Kim model was enhanced by replacing the empirical source terms with ones based on the chemistry and physics of the charge and discharge processes which occur in the electrode layers of a battery cell. As such, fundamental battery function was imparted to the model by integrating the SPM into the equivalent circuit model. The 2D procedure described above was carried out on electrode sheets at different positions inside the cell, and determined thermal generation values that were mapped volumetrically into a heat transfer simulation, which in turn, updated the electrochemical simulation. Capacity fade kinetics were determined by fitting experimental data to simulated results. With time-temperature profiles produced as described above for different pack cooling levels and varying degrees of cell degradation, a basic SPM simulation was then used with thermal overlays to estimate automotive cell life under various driving scenarios and a range of thermal management approaches.

Copyright (c) 2017 by ASME
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