Study On Fault Diagnosis System Design Of Pure Electric Vehicle High Pressure System

Hybrid At present,China has become a big country of new energy automobile,domestic and foreign automobile manufacturers and parts suppliers have invested a lot of funds in research and development of new products,of which pure electric vehicle is the most rapidly developed.The key technologies of pure electric vehicle(EV)are power battery system,drive motor system and vehicle control system.In the face of pure electric vehicle power system as a new high-voltage system,development,commissioning and maintenance is difficult and dangerous.In order to study and train the comprehensive talents of pure electric vehicle,it is imperative to develop the fault diagnosis system of high voltage system of pure electric vehicle.The skill training of high voltage system fault diagnosis system of pure electric vehicle(EV)is mainly to improve the knowledge and skill system construction of EV high voltage system fault diagnosis training platform.This topic from the current market pure electric vehicle model maturity,second-hand vehicle circulation market and accessories market access to the corresponding components and other parameters,in this paper,JAC IEV4 electric vehicle is chosen as the original vehicle of high voltage system fault diagnosis system of electric vehicle.The high-voltage system fault diagnosis training platform for pure electric vehicle is mainly composed of power battery,drive motor assembly,vehicle controller,DC / DC converter,vehicle charger,etc..This paper also summarizes the process of disassembling the parts and components from the Jianghuai IEV4 vehicle,the frame structure of making platform with selected materials,and the layout of the parts.The training platform developed for high voltage system fault diagnosis of pure electric vehicles can better meet the needs of pre-service training for relevant employees of pure electric vehicles in enterprises,and the teaching needs of pure electric vehicles courses for new energy vehicle majors in various universities,etc.It lays a foundation for the further research of high voltage system fault.By consulting relevant literature and design manuals,learning the design knowledge of the Fault Diagnosis Training Platform,and drawing on the design achievements of pure electric vehicles of predecessors,the structure characteristics,control principle,relative dimension and parameter calculation of the power system high voltage system fault diagnosis training platform for pure electric vehicle are analyzed.This topic is mainly to study the common faults of the power battery system,drive motor system and vehicle control system of the pure electric vehicle.Combining the high voltage fault diagnosis system of the pure electric vehicle,according to certain theoretical knowledge and maintenance skills,set up the corresponding failure point,carried on the planned practice.The fault setting controller of the high voltage fault diagnosis system is connected with the parts of the pure electric vehicle to form a prototype,and the validity of the designed fault setting is verified by running the prototype.