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Open AccessArticle

Design of an Optimized Thermal Management System for Li-Ion Batteries under Different Discharging Conditions

1
Department of Electrical and Electronics Engineering, BITS-Pilani, Hyderabad Campus, Telangana 500078, India
2
Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, UK
3
College of Engineering, Mathematics and Physical Sciences, Renewable Energy, University of Exeter, Cornwall TR10 9FE, UK
*
Author to whom correspondence should be addressed.
Energies 2020, 13(21), 5695; https://doi.org/10.3390/en13215695
Received: 2 October 2020 / Revised: 23 October 2020 / Accepted: 27 October 2020 / Published: 30 October 2020
(This article belongs to the Special Issue Battery Management for Electric Vehicles)
The design of an optimized thermal management system for Li-ion batteries has challenges because of their stringent operating temperature limit and thermal runaway, which may lead to an explosion. In this paper, an optimized cooling system is proposed for kW scale Li-ion battery stack. A comparative study of the existing cooling systems; air cooling and liquid cooling respectively, has been carried out on three cell stack 70Ah LiFePO4 battery at a high discharging rate of 2C. It has been found that the liquid cooling is more efficient than air cooling as the peak temperature of the battery stack gets reduced by 30.62% using air cooling whereas using the liquid cooling method it gets reduced by 38.40%. The performance of the liquid cooling system can further be improved if the contact area between the coolant and battery stack is increased. Therefore, in this work, an immersion-based liquid cooling system has been designed to ensure the maximum heat dissipation. The battery stack having a peak temperature of 49.76 °C at 2C discharging rate is reduced by 44.87% to 27.43 °C after using the immersion-based cooling technique. The proposed thermal management scheme is generalized and thus can be very useful for scalable Li-ion battery storage applications also. View Full-Text
Keywords: Li-ion battery; thermal behavior; discharge rate; cooling techniques; liquid cooling Li-ion battery; thermal behavior; discharge rate; cooling techniques; liquid cooling
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MDPI and ACS Style

Bhattacharjee, A.; Mohanty, R.K.; Ghosh, A. Design of an Optimized Thermal Management System for Li-Ion Batteries under Different Discharging Conditions. Energies 2020, 13, 5695. https://doi.org/10.3390/en13215695

AMA Style

Bhattacharjee A, Mohanty RK, Ghosh A. Design of an Optimized Thermal Management System for Li-Ion Batteries under Different Discharging Conditions. Energies. 2020; 13(21):5695. https://doi.org/10.3390/en13215695

Chicago/Turabian Style

Bhattacharjee, Ankur; Mohanty, Rakesh K.; Ghosh, Aritra. 2020. "Design of an Optimized Thermal Management System for Li-Ion Batteries under Different Discharging Conditions" Energies 13, no. 21: 5695. https://doi.org/10.3390/en13215695

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