Study On Matching Batteries For Mild Hybrid Electric Vehicle

The development of automobile industry facilitated the advancement about global traffic and economy etc, but significant increase in vehicle ownership indued increasingly serious problems of environment pollution and energy sources crisis. Electric vehicle become the research hotpot for the predominance in economy and environment, at preeent, the best compromising solution is hybrid electric ehicle (HEV).In the developed countries for example occident and Janpan, many types of HEV had been in sale.In our country the HEV research has acquired definite harvest.Battery is a important composing of HEV, battery fect the power and economy of HEV. The bigger battery capacitance is the stronger the capability is, the longer the pure electric mileage is. But bigger capacitance brings on heavier battery mass, influences the vehile capability and increases the cost. So study on batteries matching is very needssary.Now,the HEV battery has many indifferent types,their parameter range is wide, when design HEV,matching battery depend on the rating parameter and the maximal pure electric drive mileage, or work out in the holistic method of optimizationand and acquire by software simulink.Of the three meanses, the firest can only estimate;the second is too complicated in account; the third simulink's validity lies on the veracity of data and the dependability of mode,So no of all these meanses is very pratieal.Text brings forward the battery for mild HEV matching means based on driving-cycle after detailedly learning battery chemic principium and characteristic, analyzing the influencing factors: control strategy, drive cycle, transmission parameter and shift strategy, drive syetem collocate and organs characteristic, and battery cost etc;By a fact example: refit a natural car to ISG system, (Engine is immanent, only added ISG system) adhibit electric assistant strategy, simulate intermal actual roadway in ECE+EUDC and the Chinese type city bus cycle to match battery, and compare analyse the result.Finally, Introduced the principium and application of ADVISOR. Amend the existent parameter of Hondar Insight and conventional vehicle, simulink the fuel economy and emissions of the refited sample and the conventional by ADVISOR 2002.Output result show: the HEV'oil economy ameliorated and the emissions are descended. These made clear: the parameters of battery are rational, the means of battery matching is feasible.