Özet:

Batteries used in electric vehicles and directly affecting performance are essential parts that enable the electric motor to move by converting chemical energy into electrical energy. Lithium-ion batteries are widely used compared to other rechargeable batteries.; They have high energy density, recyclability and specific power, low weight and self-discharge rates, longer cycle life and more energy storage capacity. While power is generated from the anode and cathode electrodes in the batteries by the movements of the anode electrodes, heat energy is also generated. In lithium-ion batteries, reversible heat production occurs with entropy change, and irreversible heat production occurs with electrical resistance. Since the safety, performance and durability of lithium-ion battery cells are sensitive to temperature, the optimum operating temperature is between 20 °C and 40 °C. Excessive heat production of batteries causes temperatures above the optimum operating temperature and causes the battery cell to overheat. Excessive temperature increases due to heat production cause thermal leaks, burns and even battery explosions. In order to prevent batteries from overheating, distributing the temperature of the battery cell homogeneously, keeping the operating temperature within the prescribed range and ensuring the desired temperature are the most critical parameters for battery thermal management. In this study, air cooling, liquid cooling and heat pipe cooling methods used in the thermal management of lithium-ion batteries were examined. As a result of the examination, the advantages and disadvantages of the cooling methods used are compared.

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