전기자동차 배터리 냉각판 수냉 유로에 설치되는 오프셋 스트립 휜의 전열 및 수력 성능 해석

Abstract

Thermal management of Lithium-ion batteries(LIB) is one of critical factors for ensuring the reliable operation of electric vehicles. For managing multiple LIB modules, a common cold plate is often mounted at the case of battery pack to achieve better thermal performance for the emission of higher thermal loads as well as more uniform temperature distribution. In this study, we proposed a new cold plate employing offset strip-fins (OSFs) cores, evaluating thermal and hydraulic performance with the objective functions of maximizing heat flux with modeling ideal fin theory. Shape optimization method is applied to obtain the optimal shape parameter of fin height and thickness for higher heat transfer rate with small increase of pressure drop. The performance of optimized design is compared with both the baseline no-fin design and the reference commercial OSFs cold plate. The maximum temperature difference is reduced 62.6% from the baseline model, so the uniformity of temperature is shown improved with the present new design as well as the remarkable reduction of pressure drop in the optimization.