Design of Hybrid Cooling System for Thermal Management of Lithium-Ion Batteries Using Immersion Method with Nanofluid Supported Heat Pipes

Osman Mert () and Mehmet Özalp
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Osman Mert: Department of Mechanical Engineering, Karabuk University, 78600 Karabuk, Türkiye
Mehmet Özalp: Department of Mechanical Engineering, Karabuk University, 78600 Karabuk, Türkiye

Energies, 2025, vol. 18, issue 8, 1-18

Abstract: In this study, straight and looped heat pipes were designed and manufactured, and their performance in cooling cylindrical lithium-ion batteries known as standard 18,650 batteries on the market was investigated. Pure water, methanol, and thermasolv IM2 liquid were used as working fluids in heat pipes. Nanofluid solutions were measured and prepared on a precision balance as 2% by weight according to the working fluid. These nanosolutions were injected into the heat pipes at a ratio of one-third by volume of the working fluids. In the designed experimental setup, the coils were placed 1 cm above the evaporator part of the heat pipes. Thanks to the designed electrical circuits, the amount of load given to and withdrawn from the batteries is controlled. The heated batteries evaporate the liquid in the heat pipe, the vapor rises and reaches the condenser. As a result of the evaporation, efficient heat transfer from the evaporator to the condenser takes place by transporting nanoparticles. At a certain flow rate, the refrigerant is transferred to the refrigerant as a result of the withdrawal of the refrigerant from the heat pipe. In this study, it is seen that the immersion method of the evaporator part in the pool full of IM2 liquid is repeated and the results are examined.

Keywords: energy efficiency; heat transfer; heat pipe; nanofluid; immersion method; lithium-ion batteries (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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