The development of electric vehicle batteries has resulted in a very high energy
density lithium-ion batteries. However, this growth is accompanied by the risk of
thermal runaway, which can cause serious accidents. Heat pipes are heat exchangers that
are suitable to be applied in electric vehicle battery thermal management for their
lightweight, compact size and do not require external power supply. This study
examined experimentally a flat plate loop heat pipe (FPLHP) performance as a heat
exchanger in the thermal management system of the lithium-ion battery for electric
vehicle application. The heat generation of the battery was simulated using a cartridge
heater. Stainless steel screen mesh was used as the capillary wick. Distilled water,
alcohol, and acetone were used as working fluids with a filling ratio of 60%. It was
found that acetone gave the best performance that produces a thermal resistance of 0.22
W/°C with 50°C evaporator temperature at heat flux load of 1.61 W/cm2.
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