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학술대회자료
저자정보
공태윤 (현대모비스) 임혜수 (현대모비스) 김화성 (현대모비스) 임태훈 (현대모비스)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2019년 학술대회
발행연도
2019.11
수록면
161 - 164 (4page)

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Most car makers are trying to implement electric powertrain to enhance fuel efficiency and meet emission regulations. According to the rising industry and environmental demand for electric vehicles, it is crucial for these vehicles to be equipped with a powerful, safe and efficient energy system that can support long-range driving. As a part of the most important electrified vehicle technology, it is essential to equip the battery cooling system which maintain the battery temperature within temperature limit to prevent thermal runaway, power-fade and life cycle-fade. For the long-range driving, capacity and density of electric vehicle battery system are increased, battery cooling performance also should be improved and it has evolved from air cooling to refrigerant indirect liquid cooling technology. The indirect liquid cooling, advanced than air cooling system in cooling performance, is connected in parallel to the climate control system through a chiller unit and cools the battery by secondary coolant loop which cooled by refrigerant of the primary air conditioning loop. The most common type of battery cooling, for production BEV and some of PHEV, is using the liquid cooling. As a method for further improving cooling performance compared to liquid cooling system, a refrigerant indirect cooling system which removes a secondary heat exchange process and cools a battery directly with a refrigerant has been introduced in the previous research and has been applied to a few vehicles. This paper focuses on verifying cooling performance of the refrigerant direct battery cooling system on system test bench stand. A bench test apparatus was constructed to apply refrigerant flow by production car air conditioning system parts and thermal load by electrical heater instead of real battery cells. As a test result, it was confirmed that the cooling performance of refrigerant direct cooling system could be enhanced about 27% in watt unit compare to that of indirect liquid cooling under same test condition.

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2. 이론 및 실험
3. 결론
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