摘要：The heat dissipation performance of the battery has important effects on the performance of the hybrid vehicle. Due to high charge discharge rate and large internal resistance, the cylindrical battery has high heat load and uneven temperature, which seriously affects the electrochemical performance, cycle life, safety and reliability of the battery. In this paper, the air duct of the battery pack was designed and the flow and heat was simulated by CFD (Computational Fluid Dynamics) software in order to improve temperature uniformity of the battery pack. Several parameters were studied such as the gap between the battery and the plastic support, the opening size of the upper first battery modules, the angle between the top surface of the battery pack cover plate and the horizontal face. On this basis, the heat balance bench test of the battery package was carried out to analyze the influence of several factors on key parameters. The test results show that the maximum temperature difference of the package is 3 °C, and the maximum temperature is 36.7 °C.The simulation results are consistent with the experimental results..
