The Research Of Electric Vehicle Power Battery Charging Characteristics And Charge Time Influence Factors

With the intensification of environmental pollution and energy crisis,new energy vehicles with its unique advantages obtained rapid development,combined with the national policy and local policy guidance,charging infrastructure is gradually perfect,the rapid development of battery technology,new energy vehicles,especially pure electric vehicles is gradually replacing traditional car,become the main force of road transport.With the popularity of pure electric vehicles,pure electric vehicle operation bottleneck more prominent,the problem such as charging time long gradually become the focus of the user,the user demand for charging speed to higher.Reasonable charging strategies can save time and extend battery life.In this paper,by studying the principle and characteristics of the lithium iron phosphate battery analysis,combined with the power batteries for electric buses and dc fast charging characteristics research,in 86 176 ah ah/batteries with a company as the carrier,through the analysis of temperature on the electric bus charging time influence factors,using experimental and modeling method for high and low temperature impact on power battery charging time characteristics,and put forward the optimization scheme,and after the experiment verify the validity of the method.In normal temperature range,the establishment of the first-order RC equivalent circuit model,the test method is used to get the normal temperature range battery charging time factors of ladder current charging method is put forward,and the method through experiment verify its effectiveness.In this paper,we can reduce the charge time by studying the charging time optimization scheme in the interval under different temperature.