Electric drive system of electric vehicle
Looking back on the past two decades, we have improved fuel efficiency, reduced carbon dioxide emissions, prevented global warming and fossil fuel depletion, and accelerated hybrid power electric vehicle (HEV) and electric vehicle (EVS). In particular, hybrid vehicles are spreading rapidly because of the existing gasoline service stations. Recently, countries have announced the sales ban policy of diesel locomotives, and the CO2 emission regulations have been tightened. Therefore, the sales display of electrified vehicles is long. At present, it is predicted that the proportion of hybrid electric vehicles and electrified vehicles will continue to increase. However, the development of EVs without internal combustion engine is accelerating. Therefore, with the development of battery and charging technology,electric vehicle The proportion in electric vehicle sales is expected to increase.
electric vehicle Or the electric drive system of electric vehicle is mainly composed of high-voltage battery and motor. Connect the power transmission through the high voltage harness.
Electric drive system and high voltage harness.
electric vehicle Or the electric drive system of electric vehicle is mainly composed of high-voltage battery, frequency converter and motor. As shown in Figure 2, connect with each other with high-voltage harness. The high-voltage harness connecting high-voltage battery and frequency converter is called underground harness, and its wire length is relatively long. The high-voltage harness connecting the frequency converter and the motor is called power cable, and its wire length is relatively short. The two high-voltage harnesses require shielding performance to prevent electromagnetic noise from affecting the surrounding electronic equipment and signal lines.
The underground harness is set under the vehicle, so it is very important to protect the wire from external damage, such as stone chips. The protector adopts resin protector and metal pipe.
In recent years, due to the shorter distance between frequency converter and motor, the length of power cable is shorter and shorter.
