Abstract
A hybrid thermal management system (TMS) for high power lithium-ion battery modules of EVs with low energy consumption and high reliability was tested under a real state driving condition. An experimental investigation was performed to compare the hybrid TMS with an active air-cooling and a passive TMSs. We employed all three TMSs in standard weather conditions of 24 °C. For dynamic mode, a study of driving cycle in comparison with US, Europe, and Japan driving cycle data was conducted to perform a dynamic model based on a high traffic city to challenge our TMSs in a real driving state including high and standard discharge rate and a stop mode in which there was no air convection. The results showed that just in the hybrid TMS, the cell surface could reach a steady-state under 60 °C while the active TMS could keep temperature only for three cycles. Furthermore, our test proved that the proposed hybrid TMS maintains outstanding reliability and efficiency in the hot weather condition of 40 °C.
Highlights
Due to ever-growing concerns over the environmental pollution, and global warming potential of fossil fuels, the development of various types of clean energy transportation systems is inevitable
Recent developments in Li-ion battery (LIB) technology including higher energy and power density along with lower cost compared to other types of batteries resulted in significant improvements in the electric vehicle (EV) performance, which made the conventional vehicles be confronted with a real challenge in various aspects
As the hybrid thermal management system (TMS) enjoys advantages of both air active and passive cooling systems simultaneously, the test procedure was conducted under normal weather conditions, and try to challenge it under a hot weather condition which was barely discussed in other studies
Summary
Due to ever-growing concerns over the environmental pollution, and global warming potential of fossil fuels, the development of various types of clean energy transportation systems is inevitable. A unique method introduced at our previous work [7] for integrating active and passive components bridged gaps mentioned above is considered to challenge the hybrid TMS in a real driving state. For achieving this purpose, an analytical approach is discussed to enable employing the known dynamometer drive schedules in the world through this hybrid TMS. As the hybrid TMS enjoys advantages of both air active and passive cooling systems simultaneously, the test procedure was conducted under normal weather conditions, and try to challenge it under a hot weather condition which was barely discussed in other studies
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