Analysis and Prediction of Thermal Performance on Charging Equipment of Electric Vehicle

<div>For the heat dissipation design of charging equipment for electric vehicles, a study is conducted on the thermal performance and its influencing factors of a specific alternating current (AC) charging device. First, based on heat dissipation theory and CFD simulation software, the corresponding finite element model is established and verified through experiments. Next, using the verified finite element model and applying the orthogonal experimental method, the factors influencing the heat dissipation performance of the AC charging pile, such as ambient temperature, output current of the AC charging pile, and surface radiation characteristics, are investigated. Finally, a prediction model for the maximum temperature of the main board is established using the response surface method (RSM), and the effects of each factor on the maximum main board temperature are analyzed, enabling rapid prediction of the heat dissipation performance of the AC charging pile. The analysis of the orthogonal experimental results shows that the ambient temperature, surface radiation characteristics, and output current all have a significant impact on the heat dissipation performance of the AC charging pile. Among these factors, the ambient temperature has the greatest impact, followed by the surface radiation characteristics, while output current has the least effect. The prediction model concludes that as the output current of the AC charging pile increases, the radiative heat dissipation performance improves. For AC charging piles with higher output power, enhancing the emissivity of the shell surface is an effective method to improve the thermal performance of the charging pile. Additionally, the higher the environmental temperature, the greater the impact of output current on the maximum temperature of the main board. When the environmental temperature decreases, the output current can be significantly increased to enhance the charging speed of the AC charging pile.</div>