In recent years, as CO2 emission regulations have become stricter, electrification of vehicles and improved fuel efficiency has rapidly progressed worldwide. When a vehicle is electrified, the internal combustion engine is no longer needed, resulting in the loss of a heat source. Consequently, the importance of thermal management has increased. One important component of the thermal management system of a vehicle is the heat exchanger. Reducing the size and weight of the heat exchanger in order to suitably control battery temperature and improve the range and dynamic performance of the vehicle is necessary. A novel three-dimensional offset fin structure that can increase heat transfer by a factor of 1.5 or greater compared to conventional fins at the same pressure was developed using thermal hydraulic analysis technology. Next, a prototype of the offset fins was manufactured by press processing, which can be applied to mid-size to mass production, and performance tests to confirm effectiveness in improving heat transfer performance were carried out. In this report, we introduce the results of these efforts.
