This technical report mainly describes the knowledge learned in product design during the internship at SINBON Electronics Co., Ltd., and includes a brief introduction to SINBON Electronics Co., Ltd., the mental journey and work content during this internship. With the decrease of petroleum resources and the pollution of the atmospheric environment, people pay attention to electric vehicles, and with the increasing number of electric vehicles, the demand for charging stations and swapping stations also increases. The product design to be explained in this technical report is as follows: A part of the battery exchange station - the front cover, introduces the design process and numerical analysis of the front cover, and shares the problems encountered and how to improve them.