Publication: Influence of packaging configuration on thermal behavior in air-cooled Li-ion battery packs under low C-rate conditions
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Issued Date
2025-05-01
Resource Type
eISSN
24519049
Scopus ID
2-s2.0-105002438943
Journal Title
Thermal Science and Engineering Progress
Volume
61
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SCOPUS
Bibliographic Citation
Thermal Science and Engineering Progress Vol.61 (2025)
Suggested Citation
Wiriyasart S., Unsomsri N., Kaewluan S. Influence of packaging configuration on thermal behavior in air-cooled Li-ion battery packs under low C-rate conditions. Thermal Science and Engineering Progress Vol.61 (2025). doi:10.1016/j.tsep.2025.103582 Retrieved from: https://hdl.handle.net/20.500.14740/20842
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Abstract
This article presents an experimental study on the air-cooling method for lithium-ion battery packs. It examines the effects of packaging design, natural and forced convection, and charge/discharge rates on thermal performance. Two packaging designs were analyzed: (1) Unmix Air Flow (Model 1) and (2) Unmix Air Flow-Air Vent (Model 2). A cylindrical 18650 lithium-ion battery pack, welded into a 6S10P configuration, was used in the experiment. Charging and discharging were conducted at 0.2C, 0.4C, and 0.6C rates. The results indicate that battery packaging significantly impacts heat transfer during energy management. Under natural air cooling, the Unmix Air Flow-Air Vent design exhibited approximately 14 % and 11 % better thermal performance during charging and discharging, respectively, compared to the Unmix Air Flow design. However, the battery cell temperatures within the pack remained excessively high, posing a risk of thermal runaway. To keep the battery cell temperatures within a safe range, forced convection with a cooling fan was employed to dissipate accumulated heat more effectively. Compared to natural air cooling, forced convection improved the thermal performance of the Unmix Air Flow-Air Vent design by about 12% during charging and 8% during discharging. This study contributes to the development of thermal management systems for low-temperature batteries, particularly in stationary applications such as electric bikes, solar energy storage, and uninterruptible power supplies, where environmental conditions like temperature, humidity, and dust can be controlled.