In this paper a novel battery thermal management system was experimentally studied. The batteries are submerged in a low boiling dielectric fluid with the aim to reduce the batteries surface temperature when subjected to high charge or discharge currents. The fluid change of phase allows to create a thermal buffer in case of instantaneous peak of absorbed current. This innovative system was studied on a battery pack composed of 3 cells in series and 3 cells in parallel connection for several discharge currents. For the sake of comparison, two battery packs of same dimensions were investigated: one submerged in the dielectric fluid and the second without the fluid. The cells potential and surface temperature were measured during discharges. Moreover, also the fluid temperature was evaluated in the external region. The results show a significant improvement of the thermal management since the increase of temperature is very restricted. This effect is even more evident when the fluid reaches the boiling point.

Preliminary analysis of a novel battery thermal management system based on a low boiling dielectric fluid / Giammichele, L.; D'Alessandro, V.; Falone, M.; Ricci, R.. - In: IOP CONFERENCE SERIES. EARTH AND ENVIRONMENTAL SCIENCE. - ISSN 1755-1307. - 1106:(2022), p. 012017. (Intervento presentato al convegno 7th AIGE/IIETA International Conference and 16th AIGE Conference on Energy Conversion, Management, Recovery, Saving, Storage and Renewable Systems, AIGE 2022 tenutosi a ita nel 2022) [10.1088/1755-1315/1106/1/012017].

Preliminary analysis of a novel battery thermal management system based on a low boiling dielectric fluid

Giammichele L.
;
D'Alessandro V.;Falone M.;Ricci R.
2022-01-01

Abstract

In this paper a novel battery thermal management system was experimentally studied. The batteries are submerged in a low boiling dielectric fluid with the aim to reduce the batteries surface temperature when subjected to high charge or discharge currents. The fluid change of phase allows to create a thermal buffer in case of instantaneous peak of absorbed current. This innovative system was studied on a battery pack composed of 3 cells in series and 3 cells in parallel connection for several discharge currents. For the sake of comparison, two battery packs of same dimensions were investigated: one submerged in the dielectric fluid and the second without the fluid. The cells potential and surface temperature were measured during discharges. Moreover, also the fluid temperature was evaluated in the external region. The results show a significant improvement of the thermal management since the increase of temperature is very restricted. This effect is even more evident when the fluid reaches the boiling point.
2022
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11566/309243
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