Research On Parameters Matching Of The Vehicle-mounted Combined Power Based On Secondary Development Of ADCISOR

Along with the promotion of concept of environmental protection and energyconservation, new energy automobile has become a hot research and development inglobal automotive industry in recent years. As a must power source of new energyvehicles--the electric energy storage system, its performance directly affectvehicle’s dynamic and economic performance. With the application of regenerativebraking system in new energy vehicles, the traffic rule of vehicle becomes morecomplex. Vehicle’s frequently driving or braking calls for frequently charging anddischarging with high power of the electric energy storage system. The traditionalelectric energy storage system of power battery group can not quickly charge anddischarge with high power. They have low efficiency and short service life. So it is aboth energy-saving and environmentally friendly method to replace the traditionalsingle power by the combined power. This paper takes a Parallel-Series HybridElectric City bus as the prototype and has refitted its single power--the powerbattery into combined power system，which is combined of nickel-hydrogen batterygroup and the super-capacitor.In order to make a reasonable and efficient structure of combined power system,this paper explored the characteristics of every component of the combined power.According to the operating characteristics of the components, a most appropriatecombined power structure--active-control parallel combined power structure wasmade for the research model. Based on the selected combined power structure, thispaper explored the combined power’s parameter matching and optimization methodgiving full consideration to various factors that influencing the combined power’sparameters design. As for the parameters matching work, firstly this papercalculated the power and energy demand of the electric drive system from theenergy storage system under the selected circulation condition based on thesimulation of ADVISOR. Then according to the average power demand, followingthe principle of limiting the maximum power and discharge current to protect thebattery, combining with the constraint of motor voltage, manufacturing cost andtotal quality, ultimately this paper determined the series number, peak power andother parameters of nickel-hydrogen battery and super capacitor, and determined thecapacity range of the two.To make parameters optimization of battery and super capacitor, this paperstudied the secondary development of ADVISOR in detail and obtained themodification of interface vehicle icon, calling of super capacitor database andcalling of new cycle simulation conditions. This paper developed the module of combined power, and established the vehicle control strategy module. Based on thework above, this paper summed up the secondary development steps of ADVISOR.Based on the combined power vehicle simulation model developed above, this papermade a parameters optimization of the battery and super-capacitor’s capacity bycombining the genetic algorithm with ADVISOR simulation. Finally, this papermade a simulation of the combined power designed to verify its feasibility, andcompared the simulation with the simulation results of single power vehicle to provethe application advantage of combined power system.