전기자동차 배터리 모듈의 공기 냉각 최적화 설계

Abstract

The Due to the development of the industry, the demand for electricity is increasing, and the use of fossil fuels is causing global warming and various environmental pollution problems. Recently, electric vehicles (EV) driven by Li-ion battery are one of the solution to overcome environmental and energy crisis. Due to high energy density, Li-ion batteries have become a necessity for electric vehicles (EV). The weakness of lithium-ion batteries, which are important as solutions to environment-friendly energy, is the thermal problem. So, in the current study, the CFD simulation study was conducted to solve this thermal problem induced from Li-ion batteries. The thermal behavior of cylindrical battery cells due to the change of air flow speed was carried out using the CFD analysis program. It was confirmed that the temperature of the cell decreased as the velocity increased. However, an appropriate velocity was set because the cell could not withstand when applying a high velocity which the pressure drop issue can be existed. As a result, it was found that even at the same temperature, the temperature has different values depending on the cell position. At the same time, it was found that the closer the inlet area and outlet area, the lower the temperature of the cell.