Design and Simulation of Lithium-Ion Battery Thermal Management System for Mild Hybrid Vehicle Application
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Friday, March 27, 2015

It is well known that thermal management is a key factor in design
and performance analysis of Lithium-ion (Li-ion) battery, which is
widely adopted for hybrid and electric vehicles. In this paper, an air
cooled battery thermal management system design has been proposed
and analyzed for mild hybrid vehicle application. Computational
Fluid Dynamics (CFD) analysis was performed using CD-adapco's
STAR-CCM+ solver and Battery Simulation Module (BMS)
application to predict the temperature distribution within a module
comprised of twelve 40Ah Superior Lithium Polymer Battery (SLPB)
cells connected in series. The cells are cooled by air through
aluminum cooling plate sandwiched in-between every pair of cells.

The cooling plate has extended the cooling surface area exposed to
cooling air flow. Cell level electrical and thermal simulation results
were validated against experimental measurements. Thermal behavior
of the battery module under constant-current (CC) discharge and
dynamic drive cycle electrical-load cases were studied to ensure
adequate cooling required for satisfying the specified operating
temperature range. For the proposed design, the maximum
temperature gradient within each cell has been found to be 1.4°C
during the US06 cycle. The results of this study also demonstrate that
fully coupled electrical-thermal three-dimensional CFD modeling
approach can be a very useful design tool for “off-line calibration” of
higher fidelity dynamic battery thermal models suitable for control
applications such as in EcoCAR competitions these authors
participating in.

Author Name: 
Ahmed Imtiaz Uddin
Jerry Ku
Author Company: 
Wayne State university