Energy efficiency optimization method for self-adaptive genetic double-electric-coupling fuel cell vehicle

Abstract

The invention discloses an energy efficiency optimization method for a self-adaptive genetic double-electric-coupling fuel cell vehicle, and aims to solve the problem that an existing control method of a double-electric-coupling system does not enable the energy efficiency of a vehicle to play to the best. The double-electric-coupling power system is characterized in that a hydrogen fuel cell generator set and a lithium ion battery pack are mainly used for jointly providing driving electric energy for the vehicle; and according to the operation condition of the vehicle, the magnitude of the discharge power of a fuel cell and the magnitude of the discharge power of a lithium ion battery are optimized in real time, the discharge power of the fuel cell is P<fc>, the discharge power of the lithium ion battery is P<L>, then the two power parameters are used as optimization design variables, a self-adaptive genetic algorithm is adopted to optimize the power magnitudes of the two parameters,the power output scheme with the highest total efficiency is finally obtained, and necessary technical support is provided for energy efficiency optimization control of the dual-electric-coupling fuelcell electric vehicle. The method is applicable to the field of vehicle design and manufacturing.

Description

technical field [0001] The invention relates to an automobile energy efficiency optimization method, in particular to an adaptive genetic dual electric coupling fuel cell automobile energy efficiency optimization method. Background technique [0002] Hydrogen fuel cell vehicles have developed rapidly in recent years. Hydrogen fuel cells have the characteristics of high energy density and fast hydrogenation speed, which solves the problems of short mileage and long charging time of pure electric vehicles. At present, dual electric coupling fuel cell vehicles are getting more and more attention, because this type of fuel cell vehicles can give full play to the technical characteristics of fuel cells and lithium batteries, and give full play to the characteristics of high discharge rate of lithium-ion batteries in the vehicle acceleration and climbing conditions. Improve the power performance of the vehicle; during the normal driving phase of the vehicle, the fuel cell system w...

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Problems solved by technology

[0003] The existing energy-efficiency optimization control methods for dual-electrically coupled fuel cell power systems are all formulated according to the rules of the vehicle’s working conditions. In the starting, accelerating, normal driving, braking and other working conditions of the vehicle, combined with the SOC state of the lithium battery, Setting the output power of fuel cells and lithium-ion batteries, it is difficult to achieve the technical solution with the highest total efficiency

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