Heat dissipation analysis and optimization of the pure electric bus lithium-ion battery pack based on CFD

 To solve the problem of poor heat dissipation in a battery pack of a pure electric bus, its cooling system is considered as the research object in this paper. A mathematical model is established to estimate its heat generation rate, the geometric model of power battery box is established by UG, and the velocity field and temperature field are simulated and analyzed using Star-ccm+. By adding the flow guiding plate, the battery pack is improved for better heat dissipation and the orthogonal experiments are carried out, the simulation results show that the maximum temperature of the single cell in the battery pack is reduced and the temperature uniformity between the cells is also improved.