Technical specifications of high-voltage cables for electric buses


With the rapid development of new energy electric vehicle field, electric vehicles will gradually replace fuel vehicles. However, there is a big difference between electric vehicle and fuel vehicle architecture, such as electric vehicle high-voltage cable system, which has various technical requirements due to the connection of high-voltage battery, inverter, motor and other components.

About the basic formation of the vehicle high-voltage cable structure is composed of conductors of copper, with insulation material, with filler, wrapping tape, twisted pairs of wires, the exterior of the sheath wrapped and formed by the entire wire and cable.
Electric bus is mainly used for transportation convenience action, urban bus, intercity transportation, long-distance tourism, unit organization collective outing action, etc.

Of course, electric buses are very simple to charge as commonly used electric cars, as long as the charging cable is connected to the car. For example, a pure electric bus, battery capacity of 240,000/600 = 400A.h, its average 100km motor power consumption of about 80, pure electricity can be 200km. this is the result of, for example, specific specifications according to the choice of high-voltage cable used as standard.

Electric car voltage is generally 336V, 384V; and electric bus is generally 580-600V, the higher the bus voltage, the wider the speed zone of the motor constant power.

Similarly, road vehicles (electric buses) wiring harness its cable long-term allowable operating temperature does not exceed 125 ℃. If the standard ambient temperature is exceeded, then the method of increasing the cross-sectional area of the cable is taken to make it meet to the ambient temperature requirements. Of course, in addition. (Bus) the entire vehicle high-voltage wiring harness is not without other items voltage resistance, insulation resistance, salt spray requirements, flame retardant requirements and harness tensile force requirements of the test.

The entire vehicle high-voltage wiring harness in the design layout also need to make the corresponding preparation. The main design scheme of the vehicle high-voltage harness involves the design of the harness direction, wire diameter design, high-voltage connector selection, the type and application of the charging port, shielding design, high-voltage harness fixed snap selection, high-voltage wire slot design, and high-voltage interlock HVIL design. In terms of design, the entire high-voltage system is fully covered by shielding, taking into account electromagnetic interference.

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