Investigation of a water-NEPCM cooling thermal management system for cylindrical 18650 Li-ion batteries

Alireza Qaderi and Farzad Veysi

Energy, 2022, vol. 244, issue PA

Abstract: Water-nano encapsulated phase change material (water-NEPCM) is a promising, new coolant made from PCM nano capsules dispersed in water. In this study, a water-NEPCM battery thermal management system (BTMS) for an 18650 Li-ion battery pack is studied using momentum, electrochemical and energy equations. The results show that water-NEPCM can lower the battery cell's average and maximum temperatures up to 34% and 51% respectively in comparison with water systems. Moreover, when water-NEPCM is used, up to 78% more temperature uniformity can be achieved. Furthermore, the electrochemical analysis shows that water-NEPCM increases Li-ion concentration differences in the battery cells by 6% and 3.31% for solid and liquid phases respectively. Also, it is revealed that water-NEPCM causes reduction in batteries voltage up to 2.74 mV. Performance evaluation criterion (PEC) results expresses that when both the better thermal performance and energy consumption are desired, it is necessary to adjust the coolant flow rate in a specific range and using the battery systems with high heat production rates is recommended. According to the results, the water-NEPCM BTMS can be supposed as a novel promising system alternative to the conventional water-cooled ones because more reduction and uniformity can be achieved for the temperature distribution.

Keywords: Li-ion battery; Nanocapsule; Phase change material; Thermal management; Electrochemical thermal model (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:244:y:2022:i:pa:s036054422102819x

DOI: 10.1016/j.energy.2021.122570

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