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Research Article

JCR. 2020; 7(6): -


PERFORMANCE STUDY ON THERMAL MANAGEMENT OF HEXAGONAL LITHIUMION BATTERY PACK USING COMPOSITEPHASE CHANGE MATERIAL

G. MURALI, G. S. N. SRAVYA, A. SRINATH, J. JAYA.

Abstract
In the modern industrial era, Lithium Ion Batteries (LIBís) are treated as the best rechargeable
batteries to use in Electric Vehicles (EVís) and Hybrid Electric Vehicles (HEVís) as they
possess long cycle life, high energy density and specific energy. However, under high
ambient temperature, overcharging and discharging, abundant heat is generated in the core
region of the battery pack and further reduces the cycle life and capacity of the LIB. So, In
order to maintain the even temperature distribution in the battery module passive Phase
Change Material (PCM) such as paraffin wax is incorporated in the hexagonal shaped LIB
pack in the present study. However due to the poor thermal conductivity of PCM, battery
temperature in the core of the module gets increased drastically at higher discharge rates. So,
in the current work the Composite Phase Change Material (CPCM) such as Expanded
Graphite/ Paraffin Wax is incorporated in the core region of the battery module where the heat
accumulation is high. The results revealed that the battery module with CPCM is under the
safe operational temperature limit at 1C and 2C and maintained even temperature distribution
among the module when compared with pure PCM cooling.

Key words: Phase Change Material, Thermal conductivity, Lithium-Ion Battery, Thermal Management, Expanded Graphite



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