Energy Flow Simulation And Energy Consumption Analysis Of Pure Electric Vehicles

In recent years,pure electric vehicles have developed rapidly due to their advantages in energy saving and environmental protection.However,the driving range problem is still one of the main factors restricting the promotion of pure electric vehicles.Vehicle energy flow simulation researches and analyzes the energy flow and energy consumption of pure electric vehicles from the system and vehicle perspectives,comprehensively considering working conditions and temperature factors,and can realize the comprehensive management of pure electric vehicle energy,and then provide complete vehicles and systems.It provides a simulation platform and reference basis for its architecture and control strategy optimization,so as to achieve the purpose of improving the driving range of pure electric vehicles.Therefore,it is necessary to study and analyze the energy decomposition and energy loss of pure electric vehicles.This article takes a certain pure electric vehicle as the research object,and analyzes the control strategy of pure electric vehicle based on the test results.Based on the AMEsim software,a vehicle energy flow simulation model of a pure electric vehicle is established and calibrated,and this model is used as a simulation platform to simulate and analyze the vehicle energy flow and energy consumption.According to the results of simulation analysis,optimization suggestions are made from multiple aspects.The specific research content is as follows:1)Analyze the configuration of a pure electric vehicle with independent drive on the front and rear axles,build a vehicle energy flow test platform,and conduct energy flow tests under different working conditions and different temperature conditions.The energy control strategy of pure electric four-wheel-drive vehicles is analyzed and researched by summarizing and processing the acquired test data.2)Introduce AMEsim simulation software,and build a vehicle energy flow simulation model based on AMEsim software.Explain and set the parameters of the important parts involved in the modeling,and complete the modeling and verification of the power transmission system.On this basis,the energy flow simulation model of the pure electric vehicle after the coupled thermal management system is established and verified.3)Based on the built vehicle energy flow simulation model,by setting the simulation conditions under different working conditions and different temperatures,understand the performance of pure electric vehicles,and conduct research and analysis on the decomposition of vehicle energy flow and the energy consumption of each component.The problems found in the comprehensive energy flow simulation analysis further propose optimization suggestions for reference.Research results show that the established vehicle energy flow simulation model is reliable and effective;the braking recovery efficiency under normal temperature NEDC operating conditions is 85.9%,which is better than WLTC operating conditions;the rear motor is relatively more involved in driving in low temperature environments Less;in high and low temperature environments,the energy flow is greatly affected by the air conditioning system.It is recommended to consider the pre-matching design and subsequent optimization of the same type of pure electric vehicle from the aspects of mechanical transmission,electric drive system control strategy and air conditioning system.