What factors affect the temperature rise of new energy vehicle electrical connectors?

I. What factors affect the temperature rise of new energy vehicle electrical connectors? 1. New energy vehicle connector contact resistance: used for conductive connections, the resistance between the two contact carriers, such as pinhole to plug contact resistance, pinhole tail and wire crimp resistance, threaded connection between the copper plate and copper plate contact resistance. 2. New energy vehicle connector material environment heating: when the automotive connector for a long period of time in high temperature environments, due to the connector in the use of the materials used in the connector are engineering plastics, metal, Rubber, etc., especially engineering plastics require a higher operating temperature of 140 ℃, but when using the product in a high-temperature environment, the connector due to its own contact with the internal resistance and heat, to reach thermal equilibrium, the ambient temperature is higher than the material allows a higher operating temperature. At this point, if the automotive connector is left in this environment for an extended period of time and is unable to release the internal temperature due to the heating of the connector's internal pinholes, the internal temperature will continue to rise and the connector will generate a large amount of heat, leading to connector burnout. This can cause the vehicle to burn, which is a very serious problem. Rubber materials and metal materials have higher operating temperature limitations, so both need to be considered in the design.3. New energy vehicle connector plate end connection: when using bolts in the design, or should take precautions to prevent loosening during the supply; at the same time, when connecting the bolts, the torsion test must be carried out in accordance with the operating specifications. In the case of screw connections of conductive parts, one of the main failure modes is not controlling the tightening torque according to the torque requirements, which leads to abnormal temperature rise and ablation of the connected parts.4. New Energy Vehicle Connector Derating Curve: Derating Curve is like selecting a product. The product should be used in a specific environment. At this point, when selecting a product, determine the range of products you choose based on the values of the attributes of that product.

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