Recently, as demand for Electric Car has been increasing, it has been a main factor that maximizing performance and ensuring the stability of the Electric Car battery to increase the reliability of Electric Car. Above all the study on thermal control in a big influence on the performance and battery life is growing in parallel. This study has compared cooling effect of an Electric Car battery between battery with Heat Sink and without Heat Sink for optimum design of Electric Car battery. Battery is simply modeled into four cells, divided into two cases of battery with Heat Sink that attached on the cell's side and without Heat Sink. And this research was conducted on forced convection. The battery which is designed by this way was numerically analyzed by CFX 14.5. Numerical results, revealed that the battery with Heat Sink was superior in terms of cooling effect. According to the numerical analysis by battery cell's temperature variations, the battery with Heat Sink turned out to be superior in cooling effect to the battery without Heat Sink.

This analytical work was performed to reveal the effect of inlet geometry of battery pack on the temperature distributions and flow stream line for a electric vehicle. To achieve this, standard k-ε model with wall function was applied and the working conditions of battery pack under different air flow rate and inlet area according to the geometry were estimated. It was revealed that as inlet area was smaller, the flow velocity was faster, and it can't cover the whole area of battery module. In case of two inlet case, the cooling efficiency of air flow is less than that of one inlet case because of low flow rate.

본 논문은 수중체용 냉각 시스템에 관하여 분석하고, 수중체에 최적화된 냉각 제어 알고리즘에 관하여 연구하였다. 수중체용 대용량 추진 전동기는 동손 및 철손으로 인해 발생하는 고열로부터 전동기를 안정적으로 보호하기 위해 청수를 이용한 냉각 시스템이 사용된다. 이 냉각 시스템은 전동기의 온도를 유지하기 위해 외부 환경 및 전동기의 회전수 유지시간에 따라 해수 및 청수 펌프 RPM을 조절한다. 본 논문에서는 제안하는 냉각 시스템의 검증을 위한 시뮬레이션 프로그램을 구성하였으며, 다양한 제어 기법을 적용하여 냉각 수행 능력을 검증하였다. 그 결과 제안하는 냉각 알고리즘은 열적 안정성과 효율이 기존 냉각 알고리즘에 비해 높음을 확인하였다.