| NUMERICAL STUDY ON THE DESIGN OF AIR COOLED BATTERY
THERMAL MANAGEMENT SYSTEM FOR ECO-FRIENDLY VEHICLES |
| Alemayehu Wakjira Huluka , Chul-Ho Kim |
| Seoul National University of Science & Technology |
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| ABSTRACT |
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Electric vehicles are a clean energy transportation option recently emerged as an alternative to the conventional engine powered vehicles. These vehicles are using Lithium ion battery as energy storage for their propulsion because of its energy density. Due to the chemical reaction of battery elements and internal resistance, the battery releases heat during charging and discharging. Unless this heat is controlled to be within the battery optimum operating temperature, the battery performance and life will be seriously affected. This paper is dedicated to conduct fundamental studies on the battery cooling. A three dimensional numerical analysis is made using PHOENICS version 2018. Cylindrical type battery cell is used in this study. The study gives insight to thermal response, flow field and temperature profiles in the battery module with air flow direction relative to battery cell orientation and cell arrangement. Temperature variation along the flow, and transverse direction of the battery pack is discussed. With a 5 mm inter cell spacing and symmetric arrangement, maximum cell to cell temperature variation in the axial flow type is observed to be 0.2 ℃, while in the radial flow type about 3.5 ℃ for same arrangement. Quantitative and qualitative results obtained from the numerical test are presented. Furthermore, this work is believed to contribute to the improvement of battery air cooling system design in such a way the associated cost and efficiency is compromised. |
| Key Words:
Electric vehicle, Li-ion battery, Thermal management, Air cooling, Battery pack |
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Corresponding Author.
Chul-Ho Kim , Email. 
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