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Technical Brief

Effects of Size of Microchannels on Thermo-Electrical Performance of an Internally Cooled Li-Ion Battery Cell

[+] Author and Article Information
Shahabeddin K. Mohammadian

Department of Mechanical and Aerospace Engineering,
University of Missouri,
Columbia, MO 65211

Yuwen Zhang

Department of Mechanical and Aerospace Engineering,
University of Missouri,
Columbia, MO 65211
e-mail: zhangyu@missouri.edu

1Corresponding author.

Manuscript received August 18, 2016; final manuscript received November 21, 2016; published online January 4, 2017. Assoc. Editor: Partha Mukherjee.

J. Electrochem. En. Conv. Stor. 13(4), 044501 (Jan 04, 2017) (5 pages) Paper No: JEECS-16-1111; doi: 10.1115/1.4035351 History: Received August 18, 2016; Revised November 21, 2016

Thermal management of Li-ion batteries utilizing internal cooling method is the promising way to keep these batteries in an appropriate temperature range and to improve the temperature uniformity. In this study, three-dimensional transient thermal analysis was carried out to investigate the effects of size of embedded microchannels inside the electrodes on the thermal and electrical performances of a Li-ion battery cell. Based on the ratio of the width of microchannels to the width of the cell, different cases were designed; from the ratio of 0 (without any microchannels) to the ratio of 0.5. The results showed that increasing the size of the microchannels from the width ratio of 0 to the width ratio of 0.5 can reduce the maximum temperature inside the battery cell up to 11.22 K; it can also improve the temperature uniformity inside the battery cell. Increasing the electrolyte flow inlet temperature from 288.15 K to 308.15 K can enhance the temperature uniformity inside the battery and the cell voltage up to 33.20% and 2.79%, respectively. Increasing the electrolyte flow inlet velocity from 1 cm/s to 10 cm/s can reduce the maximum temperature inside the battery cell up to 8.09 K.

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References

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Figures

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Fig. 1

Definition sketch, geometry dimensions, and boundary conditions

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Fig. 2

Computational grid

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Fig. 3

Comparison of minimum temperature inside the battery

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Fig. 4

Maximum temperature inside the battery cell versus the width ratio of the microchannels (5C, 600 s)

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Fig. 5

SDT inside the battery cell versus the width ratio of the microchannels (5C, 600 s)

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Fig. 6

Temperature contours of the battery cell (5C, 600 s)

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Fig. 7

Cell voltage versus the width ratio of the microchannels (5C, 600 s)

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