체적발열량 변화에 따른 전기자동차 배터리 팩의 열적 거동 및 냉각성능에 관한 연구
A Study on the Thermal Response and Cooling Performance of a Liquid-Cooled Electric Vehicle Battery Pack under Varying Volumetric Heat Generation Rates
This study evaluates the thermal response and cooling performance of a liquid-cooled electric vehicle battery pack under varying volumetric heat generation rates. A three-dimensional cooling model was constructed based on an actual electric vehicle battery pack, and transient thermal-fluid simulations were performed using ANSYS Fluent. To isolate the effect of battery heat generation, the geometry, coolant conditions and boundary conditions were kept identical, while the volumetric heat generation rates were set to 17,000, 34,000 and 170,000 W/m³. Under these identical cooling conditions, the maximum battery module temperatures were 307.755 K, 322.129 K and 386.690 K, respectively. As the volumetric heat generation rate increased, the maximum temperature also increased, with a pronounced rise under the highest heat-generation condition. These results indicate that the thermal load directly affects the thermal response and cooling performance of the battery pack and that, under high thermal-load conditions, the existing cooling configuration may become insufficient to maintain a comparable battery temperature. The results provide fundamental data for evaluating thermal responses and improving battery thermal management system design under different heat-generation conditions.
목차
Abstract 1. 서론 2. 배터리 팩 냉각 시스템 해석 모델 및조건 2.1 배터리 팩 및 냉각 시스템 모델 2.2 격자 생성 2.3 지배방정식 2.4 해석 방법 및 경계 조건 2.5 체적발열량 조건 설정 3. 체적발열량에 따른 배터리 온도특성 및 고찰 3.1 체적발열량에 따른 온도분포 3.2 최대온도 비교 및 냉각성능 평가 4. 결론 References