Since new energy vehicles are "green" vehicles, connectors are also required to be green and environmentally friendly. Among them, the most important issue is safety, because the operating voltage ranges from 400V to 600V, and the operating current ranges from 50A to 300A or even higher. Considering that operators will inevitably touch the engine compartment during the entire life cycle of a car, the need for high-standard protection against electric shock is obvious. In addition, at such high power, electromagnetic interference is another important issue. In addition, electrical arcs are generated during connector plugging and unplugging operations, which will seriously harm electrical connections and electronic equipment, and may cause automobile burns. All these require special design and development of connectors.


　　New energy vehicle connectors must meet their high-performance requirements mainly by strict design specifications. For example, in the case of exposure, it is necessary to prevent high voltage from breaking the air, which requires a certain air gap; in the case of high voltage and high current, its The temperature rise should not exceed the rated value; the weight, strength, and ease of processing should be considered when selecting the shell material, and how to maintain the stability of the material properties of the connector terminals at different temperatures and how to ensure the necessary conductivity must be considered.

　　The high-voltage connectors of electric vehicles need to be connected to two vehicles. When reconnecting, they rely on the traction when the two vehicles are connected to the couplers to make the two connectors slowly approach, and under the guidance of the horns, make their respective conductive The semi-circular ring (static contact) is accurately inserted into the fork-shaped piece (moving contact) of the opposite party to connect the primary high-voltage circuit of the two vehicles. At the same time, the tension spring on the fork tightly buckles the half ring. Since the relative displacement of the two connectors is absorbed and adjusted by the tension spring and the return spring, the contact pressure between the fork and the half-ring can be kept constant. Change, so as to ensure better electrical performance.



　　Characteristics of high-voltage connectors for electric vehicles:

　　1. The high-voltage connector itself does not have an operating mechanism. The operating force when connecting and disconnecting is derived from the traction when the locomotive coupler is connected or disconnected. The connection or disconnection of the random coupler is completed at the same time. It is not necessary to operate separately, which is very convenient.

　　2. In the connected state, the contact pressure of the contact is only related to the contact spring and is not affected by the running state of the locomotive, so the contact pressure of the contact is basically constant, avoiding contact wear and electrical corrosion.

　　3. The conductive contact is a fork ring structure, which is a typical line contact method, with stable and reliable working conditions, low contact resistance, and good heat dissipation performance.

　　4. The connector does not have an arc extinguishing device, so it must be connected or disconnected in an unpowered state.

　　5. High-voltage connectors must be used in pairs. From the perspective of product versatility and interchangeability, each high-voltage connector has exactly the same structure, with good interchangeability, and there is no distinction between front and rear. In order to meet different operating requirements, any combination can be used.

　　The high-voltage connector of the electric vehicle relies on the power of the locomotive to connect to the trailer coupler, and it is connected to the coupler at the same time. When it is separated, the coupler of the car is automatically disconnected.

In summary, this article has explained electric vehicle connectors for everyone. I believe everyone will have a deeper and deeper understanding of electric vehicle connectors. I hope this article can be of greater reference value for readers. If you want to learn more about connectors, you can browse other articles on our blog, or continue to follow our updates.