Air-inlet of micro electric vehicle can be arranged in a plurality of positions. It is worth researching whether the air-inlet arranged in the front of micro electric vehicle power cabin can improve disperse heat efficiency.It is also important to choose a finer air-inlet & air-outlet pattern to improve disperse heat efficiency.The results indicate that the temperature of power cabin is affected evidently by the battery heat

environment temperature and air-inlet temperature

whereas is affected less by air-outlet pattern

number and speed of the air-inlet;when the intake air temperature is lower than the ambient temperature

increasing the number of air-inlet quantity and vehicle speed can improve the cooling performance

and when the intake air temperature is above the ambient temperature

reducing the number of air-inlet quantity and vehicle speed can improve the cooling performance.Then the reference basis for choosing disperse heat project was provided.