Connectors for new energy vehicles are one of the major categories of connectors. With the development of new energy vehicles in the country in recent years, they are gradually separated from traditional high-voltage, high-current and traditional low-voltage automotive connectors. Compared with traditional high-voltage and high-current connectors, the working conditions of new energy vehicle connectors are more complex and changeable, and the reliability of connectors is higher; compared with traditional low-voltage automotive connectors, due to the increase in voltage level ( At present, the voltage of mainstream systems is higher than 300V DC), which increases the risk of electric shock injury to the human body and requires higher safety requirements for connectors; therefore, the insulation and protection requirements of products are improved compared with traditional low-voltage plug-ins.