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Design and Development of Liquid Immersion Cooling System for Battery Packs of High-Performance Light Electric Vehicles

PI Name & Affiliation:

Dr. Anindita Roy

Dr. Anindita Roy
Associate Dean Research and Development

CO-PI Name & Affiliation:

Dr. Narendra Deore

Dr. Narendra Deore
Associate Dean Industry Institute Interaction

Mr. Pranav Nagaveykar

M.Engg. Student (Heat Power Engineering)

Dr. Suryakant Nagdewe

Mentor, Dassault Systèmes

Funding Agency: Dassault’s La Fondation

Total fund sanctioned: Rs. 4,00,000

Project Description:

The battery packs used in Light Electric Vehicles (LEVs) and e-motorcycles are currently air cooled using natural convection or forced air convection. Air cooling is insufficient for EV battery packs and leads to reduced battery performance and life. The performance further deteriorated for Indian subcontinent due to its hot climate. The parasitic power consumed by a forced convection air cooling system is 60% more as compared to liquid cooling system. The need for an effective compact liquid cooling system is felt for thermal management of lithium ion battery packs which can be used for high performance drives and capable of handling fast charging. An in-depth literature study on national and international level reveals unavailability of direct liquid cooled application for small EV battery packs.

The objective of this project is to design and develop a direct liquid immersion cooled battery thermal management system for battery packs suitable for LEVs. In the process, it is aimed to develop and study the thermal profile of immersed cooling systems with respect to other cooling methods. Major focus will be on maximum temperature & temperature gradient in the pack and the parasitic pump power consumed. The results will be compared with a numerical thermal simulation using Dassault’s Simulia software. The feedback will be used to further improve the accuracy of numerical model.

Introduction to Liquid immersed battery pack