Research On Hybrid Power Of Hybrid Electric Vehicles And Energy Feedback

With the continuous development of world economy, energy and environment issues have become increasingly prominent, hybrid vehicles became the main theme of the times in the automotive industry, so the governments and car manufacturers are highly valued. As hybrid vehicles continue to research and development, lack of battery power bottlenecks greatly restricted the development of hybrid vehicles.Hybrid vehicles can dramatically reduce fuel consumption and reduce vehicle emissions, especially suitable for general congestion in big cities, the conditions of car frequent braking. Super capacitors can provide and absorb large power in a short time, high efficiency energy recovery, high charge and discharge times, long cycle life, wide operating temperature; its use based on material prices are also very cheap, for the frequent acceleration and deceleration urban traffic conditions, but the super-capacitor can only store a small amount of energy. Battery have the capacity of storage large energy, but the output power is low, high current charge and discharge can not be determined that the battery can provide power in a short time. Super capacitor and battery will be used in combination, during the operation by the motor vehicle battery to provide the average electric power demand, while the super capacitor provides the peak electrical demand for power, this can give full play to the battery than the energy of large and super-capacitor high specific power advantages.Hybrid power as the research object in this paper, in introducing the composite structure and the basic principles of power based on the analysis of a hybrid electric vehicle lead-acid battery and super capacitor charging and discharging the working principle and characteristics of lead-acid batteries for hybrid electric vehicle energy systems super capacitor parameters and braking parameters were studied in a two-way hybrid power DC / DC converter based on the principle of its design parameters, design of the converter hardware and software. Developed a composite of three power control strategy, and control strategy optimization, and finally, on two of the optimized control strategy simulation to compare the same operating conditions, which control strategy is better.