The Strypped-Down Design Of Pure Electric Postal Vehicle

With the development of the economy, fuel car ownership and environmentalproblems are also growing. Apart from economical problems, limited oil resource isalso pushing us to use new energy to replace oil resources. The past few years havewitnessed more and more electric vehicle driven on the road, which brought much hopeto solve the energy crisis. The development and application of electric vehicles iscontributing to relieving the pain of oil recourses shortage with zero emission. I believethat the environmental problems can also be relieved to certain degree by its applicationand development.This article took HAFEI MINYI6370E model as target in regard to the currentmarket demand. Researches on characteristics parameters matching of key componentsof the pure electric postal vehicle (motor,battery and transmission), as well assimulations on CRUISE software influences on vehicle performance and drivingmileage under various working conditions are conducted to determine the optimalparameters of the components.First of all, key component design and selection is conducted based on function,performance and driving comfort of targeted vehicle. Through implementation of CANbus technology, intelligent management of vehicle can be achieved by whole carcontroller. And the control principle design is done under the guidance of systemrequirements.Next, restructure installation process with selected components ofthe vehicle. Full consideration is given to vehicle axle load distribution and key partsprotection. After that, design wire harness and complete vehicle assembly.Finally, debug and adjust the prototype. Performance tests are organized testresults are evaluated for further improvement.This research helped improving systematic understanding of the electric vehicletechnology and establishing complete whole car and key component developmentprocess. Core technologies involved in this research are: controller local area network,vehicle body low-voltage electrical local area network (CAN bus technology);multi-stage mechanical and electrical collaborative regenerative braking energyfeedback technology of electric vehicle; real-time simulation estimation of batterymanagement system SOC and automatic balance technology; and vehicle data acquisition and analysis based on CAN bus. The completion of this research hasequipped with whole car development capacity, the capability of optimization andintegration of power system, and comprehensive evaluation power of controller, drivingmotor and battery, as well as the research ability of common vehicle technologies.