Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries
The heat generation of lithium ion batteries in electric vehicles (EVs) leads to a degradation of energy capacity and lifetime. To solve this problem, a new cooling concept using an oscillating heat pipe (OHP) is proposed. In the present study, an OHP has been adopted for Li-ion battery cooling. Due...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2018-03-01
|
Series: | Energies |
Subjects: | |
Online Access: | http://www.mdpi.com/1996-1073/11/3/655 |
id |
doaj-11274f11f2984dae9e4108ef502cb905 |
---|---|
record_format |
Article |
spelling |
doaj-11274f11f2984dae9e4108ef502cb9052020-11-25T01:02:53ZengMDPI AGEnergies1996-10732018-03-0111365510.3390/en11030655en11030655Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion BatteriesRi-Guang Chi0Won-Sik Chung1Seok-Ho Rhi2Applied Thermal Engineering Lab, School of Mechanical Engineering, Chungbuk National University, 1 ChungDae-ro, SeoWon-gu, Cheongju 28644, KoreaApplied Thermal Engineering Lab, School of Mechanical Engineering, Chungbuk National University, 1 ChungDae-ro, SeoWon-gu, Cheongju 28644, KoreaApplied Thermal Engineering Lab, School of Mechanical Engineering, Chungbuk National University, 1 ChungDae-ro, SeoWon-gu, Cheongju 28644, KoreaThe heat generation of lithium ion batteries in electric vehicles (EVs) leads to a degradation of energy capacity and lifetime. To solve this problem, a new cooling concept using an oscillating heat pipe (OHP) is proposed. In the present study, an OHP has been adopted for Li-ion battery cooling. Due to the limited space in EVs, the cooling channel is installed on the bottom of the battery module. In the bottom cooling method with an OHP, generated heat can be dissipated easily and conveniently. However, most studies on heat pipes have used bottom heating and top or side cooling methods, so we investigate the various effects of parameters with a top heating/bottom cooling mode with the OHP, i.e., the inclination angle of the system, amount of working fluid charged, the heating amount, and the cold plate temperature with ethanol as a working fluid. The experimental results show that the thermal resistance (0.6 °C/W) and uneven pulsating features influence the heat transfer performance. A heater used as a simulated battery was sustained under 60 °C under 10 W and 14 W heating conditions. This indicates that the proposed cooling system with the bottom cooling is feasible for use as an EV’s battery cooling system.http://www.mdpi.com/1996-1073/11/3/655oscillating heat pipe (OHP)Li-ion battery coolingelectric vehicles (EVs) |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ri-Guang Chi Won-Sik Chung Seok-Ho Rhi |
spellingShingle |
Ri-Guang Chi Won-Sik Chung Seok-Ho Rhi Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries Energies oscillating heat pipe (OHP) Li-ion battery cooling electric vehicles (EVs) |
author_facet |
Ri-Guang Chi Won-Sik Chung Seok-Ho Rhi |
author_sort |
Ri-Guang Chi |
title |
Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries |
title_short |
Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries |
title_full |
Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries |
title_fullStr |
Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries |
title_full_unstemmed |
Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries |
title_sort |
thermal characteristics of an oscillating heat pipe cooling system for electric vehicle li-ion batteries |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2018-03-01 |
description |
The heat generation of lithium ion batteries in electric vehicles (EVs) leads to a degradation of energy capacity and lifetime. To solve this problem, a new cooling concept using an oscillating heat pipe (OHP) is proposed. In the present study, an OHP has been adopted for Li-ion battery cooling. Due to the limited space in EVs, the cooling channel is installed on the bottom of the battery module. In the bottom cooling method with an OHP, generated heat can be dissipated easily and conveniently. However, most studies on heat pipes have used bottom heating and top or side cooling methods, so we investigate the various effects of parameters with a top heating/bottom cooling mode with the OHP, i.e., the inclination angle of the system, amount of working fluid charged, the heating amount, and the cold plate temperature with ethanol as a working fluid. The experimental results show that the thermal resistance (0.6 °C/W) and uneven pulsating features influence the heat transfer performance. A heater used as a simulated battery was sustained under 60 °C under 10 W and 14 W heating conditions. This indicates that the proposed cooling system with the bottom cooling is feasible for use as an EV’s battery cooling system. |
topic |
oscillating heat pipe (OHP) Li-ion battery cooling electric vehicles (EVs) |
url |
http://www.mdpi.com/1996-1073/11/3/655 |
work_keys_str_mv |
AT riguangchi thermalcharacteristicsofanoscillatingheatpipecoolingsystemforelectricvehicleliionbatteries AT wonsikchung thermalcharacteristicsofanoscillatingheatpipecoolingsystemforelectricvehicleliionbatteries AT seokhorhi thermalcharacteristicsofanoscillatingheatpipecoolingsystemforelectricvehicleliionbatteries |
_version_ |
1725203103159943168 |