Research On Performance Simulation And Control Strategy Of Load Isolated Pure Electric Drive

Because the pure electric vehicles and hybrid cars mostly use single battery for energy storage,which is easy to cause the appeared battery problems such as overheating, overcharging and excessive discharging, etc. And the travel distance is short, charging is not convenient. In order to solve these technical problems, this topic put forward a new kind of dynamic driving system--Load isolated pure electric driving(LIPED).This system makes the energy and dynamic different, with the total energy of load need not the maximum power demand matching with the internal combustion engine; Internal combustion engine is isolated from the load and is not affected by load, and it will always works in the most economic conditions; Using two or more group battery as the energy storage system for alternating charge and discharge to prevent the battery overheating, overcharging and excessive discharging; The power output module is adapted to the load power demand and effectively recycling regenerative braking energy, which would greatly reduce the power of internal combustion engine.In this paper, on the basis of a certain light truck we developed a load isolated pure electric driving vehicle(LIPED-EV). According to the performance of the car we made homologous parameter matching of the power system; Using MATLAB/SIMULINK we established a system model for vehicle and made vehicle performance simulation, verified the feasibility and advantage of the LIPED system; presented the design theory of control system of LIPED-EV based on the CAN bus; The drive system control strategy was carried on analysis and research based on power battery SOC level and running condition of vehicle, which would provide theoretical basis to design more accurate and stable control strategy.