A vehicle composite power supply energy management system

Abstract

The invention relates to the technical field of vehicle composite power supply system energy management, in particular to a vehicle composite power supply energy management system which mainly comprises a composite power supply management unit, a fuzzy logic controller and a particle swarm optimization algorithm. The composite power supply management unit is used for collecting operation parameters of the lithium battery and the super capacitor, processing the operation parameters, outputting a state-of-charge value to the fuzzy logic controller, and receiving an output signal of the fuzzy logic controller to control output of the composite power supply. The fuzzy logic controller is used for obtaining a charging and discharging control signal of the super capacitor according to the inputSOC estimated value of the lithium battery, the SOC of the super capacitor and the required power through a logic relationship; the particle swarm optimization algorithm is used for optimizing parameters of a membership function of the fuzzy logic controller. The charging and discharging times of the lithium battery can be effectively reduced, the service life of the lithium battery is prolonged,and the power supply efficiency of the composite power system is improved.

Description

technical field [0001] The invention relates to the technical field of energy management of a vehicle composite power supply system, in particular to an energy management system of a vehicle composite power supply. Background technique [0002] With the global energy crisis and environmental problems becoming increasingly prominent, the development of new energy vehicles has become an inevitable trend in the development of the automobile industry. Pure electric vehicles using a single power source are prone to defects such as weak endurance, insufficient acceleration power, and short battery life. Therefore, the research and development of hybrid electric vehicles is particularly important. Combining supercapacitors and batteries as the power source of electric vehicles can make full use of the fast response characteristics of supercapacitors, reduce the charging and discharging frequency of batteries, so as to prolong the service life of batteries and increase the mileage o...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides an energy management system and method of a vehicle composite power supply to solve the problems of low estimation accuracy of the state of charge of the lithium battery, short service life of the lithium battery, and low power supply efficiency of the composite power supply power system.

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