Detail publikace
Polymeric hollow fibers: Uniform temperature of Li-ion cells in battery modules
BOHÁČEK, J. RAUDENSKÝ, M.
Anglický název
Polymeric hollow fibers: Uniform temperature of Li-ion cells in battery modules
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
In the present work, a new heat exchanger is introduced for conventional liquid cooling of cylindrical type lithium-ion cells which are contained in battery packs/modules of electric vehicles. The coolant channels are made of polymeric hollow fibers (ø1 mm) embedded in a durable polydicyclopentadiene housing. Unlike commercially available metallic counterparts, the proposed design is lightweight, electrically non-conductive, and made of low cost materials. The prototype is stacked with 18650-type lithium-ion cells which are cycled with 1 C in the range of state-of-charge between 0 and 100%. Water/coolant circulates in the hollow fibers in the range of 0.1–0.7 l/min corresponding to the flow rate supplied to a battery delivering one kilowatt hour of electrical energy. For the coolant temperature of 23 °C at the inlet, maximum temperature of the hottest cell is between 49 and 35 °C in the given range of flow rates. Furthermore, temperature spread among cells is in the range between 14.6 and 4.6 °C. With the help of the mathematical optimization coupled with computational fluid dynamics simulations, we found that having a homogeneous temperature distribution among all the Li-ion cells is achievable. For that purpose, a non-uniform thickness of thermal insulation is suggested. The temperature homogeneity is preserved for a given flow rate of the coolant and even when temporal variations in the heat generation rate occur.
Anglický abstrakt
In the present work, a new heat exchanger is introduced for conventional liquid cooling of cylindrical type lithium-ion cells which are contained in battery packs/modules of electric vehicles. The coolant channels are made of polymeric hollow fibers (ø1 mm) embedded in a durable polydicyclopentadiene housing. Unlike commercially available metallic counterparts, the proposed design is lightweight, electrically non-conductive, and made of low cost materials. The prototype is stacked with 18650-type lithium-ion cells which are cycled with 1 C in the range of state-of-charge between 0 and 100%. Water/coolant circulates in the hollow fibers in the range of 0.1–0.7 l/min corresponding to the flow rate supplied to a battery delivering one kilowatt hour of electrical energy. For the coolant temperature of 23 °C at the inlet, maximum temperature of the hottest cell is between 49 and 35 °C in the given range of flow rates. Furthermore, temperature spread among cells is in the range between 14.6 and 4.6 °C. With the help of the mathematical optimization coupled with computational fluid dynamics simulations, we found that having a homogeneous temperature distribution among all the Li-ion cells is achievable. For that purpose, a non-uniform thickness of thermal insulation is suggested. The temperature homogeneity is preserved for a given flow rate of the coolant and even when temporal variations in the heat generation rate occur.
Klíčová slova anglicky
Thermal management system, Cooling, Li-ion cell, Battery, Simulation, Heat exchanger
Vydáno
10.06.2019
Nakladatel
PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
ISSN
1359-4311
Ročník
159
Číslo
1
Strany od–do
1–11
Počet stran
11
BIBTEX
@article{BUT158523,
author="Jan {Boháček} and Petr {Dyntera} and Miroslav {Raudenský} and Ebrahim {Karimi-Sibaki},
title="Polymeric hollow fibers: Uniform temperature of Li-ion cells in battery modules",
year="2019",
volume="159",
number="1",
month="June",
pages="1--11",
publisher="PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",
issn="1359-4311"
}