Connectors are widely used in automotive power systems, body systems, on-board equipment systems and other systems, new energy vehicles need a complete set of high-voltage connection system, a complete high-voltage connection system needs to use a large number of connectors, different from the traditional low-voltage automotive wiring focus on the battery, electric drive, electronic control, it is very important to improve the electrical performance of physical characteristics such as heat resistance, voltage resistance, current carrying capacity, EMC and so on. The shielding performance of the new energy vehicle is more and more demanding. For the metal connector, it can conduct directly through its own body, and the risk is lower, the shielding resistance will be smaller. High-current connector transmission, the need for the connector itself has very good heat dissipation capacity, the same cable specifications, metal than plastic has more excellent heat dissipation capacity. For more complex working conditions, high temperature, low temperature, aging, salt spray, oil, protection, impact and so on these requirements of the connector need to do very well.