Importance of developing power density in high-voltage components at this point of automotive industry progress is at a high level. This tendency as well as tendency to combine multiple components into a common body are a key to achieving competitive advantages of electric vehicles. This scientific paper discovers the main approaches to evaluation of electric motor heat exchangers and provides a review of modern solutions in this field. Development of electric motor designs and components is in its active phase, as evidenced by many publications, patents and a variety of produced electric vehicles. Heat exchangers play an important role in securing reliability and durability of electric motors. Current tendencies in heat exchanger development are aimed at improving cooling efficiency, lowering energy consumption and reducing the device size.