ENVIRONMENTAL VIBRATION EXPERIMENT AND OPTIMIZATION OF NEW ENERGY CAR BATTERY COOLING FAN

摘要

This paper is a study on improving the reliability of battery cooling fans for new energy vehicles to ensure the normal operation of batteries. In order to improve the reliability of the new energy vehicle battery cooling fan developed by a company in Fuzhou, China, it is necessary to reduce the vibration level of the fan. This paper studies the vibration effects of three different vibration damping structures on the cooling fan of the new energy vehicle battery in different combinations. The optimal damping structure was obtained through experimental comparison and analysis. Under the condition of optimal damping structure of the fan, the influence of six different damping materials on the vibration of the fan was tested experimentally. The results show that the vibration energy of the two-stage damping structure of the fan is smaller in the radial direction and the axial direction when the AB type combination is used. When the damping structure adopts the TPV material under the AB type combination, the fan is in the whole speed range. The vibration is relatively stable, which may be mainly due to the small stiffness of the damping structure, the low natural frequency, and no resonance with the fan component system. This study can provide engineering reference for the vibration reduction and noise reduction of new energy vehicle battery cooling fans, thus ensuring the normal operation of new energy vehicle batteries, extending battery life and reducing environmental pollution caused by used batteries.