Connector products in the field of new energy vehicles are the most widely used in the world, accounting for 22% (a group of data shows that the number of connectors in a car reaches 600-1000)
To make up for the research gap in the field of high voltage wiring harness of electric passenger cars in China, the high voltage wiring harness needed in electric passenger cars in China is purchased directly. The current situation of foreign products launched a high voltage and high current electric passenger car high voltage wiring harness independent research and development. According to the high voltage electrical system of an electric passenger car for the use of high voltage wiring harness requirements, designed electric passenger car high voltage wiring harness should meet the following requirements:
A. High voltage and large current usage requirements
B. electronic interference resistance, waterproof, seismic, wear resistance, flame retardant and contact reliability and other safety requirements
The traditional car is powered by a gasoline engine. The role of the traditional car cable is to transmit control signals. The current and voltage bears are very small, so the diameter of the cable is small, and the structure is only external insulation of the conductor. But according to the use requirements of electric passenger car high voltage cable, electric passenger car high voltage cable mainly plays the role of energy transmission, need to transfer the energy of the battery to each subsystem, so the design of electric passenger car high voltage wiring harness must meet the high voltage and large current transmission. Electric passenger cars of high voltage cable under high voltage (the highest rated voltage 600 v), the current is larger (600 a) the highest-rated current, electromagnetic radiation is stronger, so the diameter of the cable is increased, at the same time to avoid electromagnetic radiation with a strong electromagnetic interference on the surrounding electronic equipment, affect the normal operation of other electronic devices, cable resistance to electromagnetic interference shielding structure was designed, which adopts coaxial structure, the use of inner conductor and outer conductor (block), cable into concentric circles within the magnetic field distribution, and the electric field from the inner conductor pointing and check in the outer conductor, make external electromagnetic field around the cable is zero, shielding of electromagnetic radiation, And make sure the electric car runs normally.
Usually, the connector (mainly refers to the contact parts) has the use of temperature limit, once the use of temperature exceeds the specified limit, the connector will be due to heat and reduce safety, or even failure damage. There are two main reasons for the increased use temperature of the connector: