Análise de um sistema de resfriamento térmico para baterias de veículos elétricos

Abstract

The growing concern of the automotive industry, due to the increasing environmental pollution, has created the need to develop cars with alternative propulsion. The electric car emerged as a solution to control pollution, as it does not use fossil fuels derived from petroleum. However, the use of these new batteries has presented contemporary challenges for engineering, especially lithium-ion batteries, which have limitations due to temperature sensitivity, requiring adequate cooling. This study focused on batteries, using a case distinct from the literature, which showed significant gains. New branching models were also proposed to further mitigate this temperature limitation, based on data from simulations performed using software. Although the tests did not show the expected efficiency when compared to the reference study, the results provided a deeper understanding of the current limitations of cooling solutions for lithium-ion batteries. The work presented different temperature results for both the battery and the coolant fluid, with the base model reaching 34.51°C in the battery and 31.78°C in the fluid. In the alternative models, the first concept reached 42.91°C in the battery and 41.84°C in the fluid, the second concept reached 42.93°C in the battery and 41.80°C in the fluid, while the third concept recorded 41.47°C in the battery and 39.81°C in the fluid. These results, when compared to the base model, highlight the importance of using a greater number of cooling channels to achieve better efficiency and a more adequate thermal performance. [resumo fornecido pelo autor]