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Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries

Author

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  • Ri-Guang Chi

    (Applied Thermal Engineering Lab, School of Mechanical Engineering, Chungbuk National University, 1 ChungDae-ro, SeoWon-gu, Cheongju 28644, Korea)

  • Won-Sik Chung

    (Applied Thermal Engineering Lab, School of Mechanical Engineering, Chungbuk National University, 1 ChungDae-ro, SeoWon-gu, Cheongju 28644, Korea)

  • Seok-Ho Rhi

    (Applied Thermal Engineering Lab, School of Mechanical Engineering, Chungbuk National University, 1 ChungDae-ro, SeoWon-gu, Cheongju 28644, Korea)

Abstract

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.

Suggested Citation

  • Ri-Guang Chi & Won-Sik Chung & Seok-Ho Rhi, 2018. "Thermal Characteristics of an Oscillating Heat Pipe Cooling System for Electric Vehicle Li-Ion Batteries," Energies, MDPI, vol. 11(3), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:655-:d:136349
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    References listed on IDEAS

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    1. Wang, Tao & Tseng, K.J. & Zhao, Jiyun & Wei, Zhongbao, 2014. "Thermal investigation of lithium-ion battery module with different cell arrangement structures and forced air-cooling strategies," Applied Energy, Elsevier, vol. 134(C), pages 229-238.
    2. Xu, X.M. & He, R., 2014. "Review on the heat dissipation performance of battery pack with different structures and operation conditions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 301-315.
    3. Jin, L.W. & Lee, P.S. & Kong, X.X. & Fan, Y. & Chou, S.K., 2014. "Ultra-thin minichannel LCP for EV battery thermal management," Applied Energy, Elsevier, vol. 113(C), pages 1786-1794.
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    Cited by:

    1. Ri-Guang Chi & Seok-Ho Rhi, 2019. "Oscillating Heat Pipe Cooling System of Electric Vehicle’s Li-Ion Batteries with Direct Contact Bottom Cooling Mode," Energies, MDPI, vol. 12(9), pages 1-14, May.
    2. Jing Chen & Junbiao Dong & Ye Yao, 2021. "Experimental Study on the Starting-Up and Heat Transfer Characteristics of a Pulsating Heat Pipe under Local Low-Frequency Vibrations," Energies, MDPI, vol. 14(19), pages 1-15, October.

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