Research on thermal flow field synergy and heat dissipation performance of electric vehicle cooling system

It is applied field synergy principle to research the heat dissipation performance of different electric vehicle cooling mode, the results indicate that: the heat dissipation capability of both sides outlet mode of wind is worse, up-outlet mode of wind can improve heat dissipation capability and aerodynamic capability; the aerodynamic capability of up-outlet mode of wind with one hole is better, the heat dissipation capability of up-outlet mode of wind with two holes is superiority, it is balance to choose up-outlet mode of wind with one hole between aerodynamic capability and heat dissipation capability; along with vehicle velocity increased, the maximum temperature rising and maximum temperature difference of battery pack will descend, and it is linearity relation along with vehicle velocity; based on field synergy principle, the sequence of different flow path's heat dissipation capability from low to high: single-inlet and single-outlet, double-inlet and double-outlet, three-inlet and three-outlet, six-inlet and six-outlet, it validates that the judgment is accuracy by combined of simulation and experimental. Then the reference basis for choosing electric vehicle cooling mode is offered. © 2013 Journal of Mechanical Engineering.