Compound energy storing system based on electric flywheel, fuel battery and lithium battery

Abstract

A compound energy storing system based on an electric flywheel, a fuel battery and a lithium battery is characterized in that the requirements of vehicles for high energy density, high power density,high efficiency and long service life of an energy storing system can be met. Under the vehicle startup working conditions, with the aid of the high power density advantages of a flywheel battery andthe lithium battery, the defect of long startup time of the fuel battery can be overcome; under the medium-high-driving required power, with the aid of the high power density advantages of the flywheel battery and the lithium battery, the whole vehicle power requirement can be met, the high-current discharging of the fuel battery can be prevented, the service life of the fuel battery is prolonged,and the work efficiency of the system is improved; under the brake working conditions, with the aid of the high power feedback advantages of the flywheel battery and the lithium battery, the whole orpartial brake energy of the whole vehicle can be fed back, and the energy utilization efficiency of the whole vehicle is improved.

Description

technical field [0001] The invention relates to a composite energy storage system, in particular to a composite energy storage system based on an electric flywheel, a fuel cell and a lithium battery. Background technique [0002] Compared with lead-acid batteries and nickel-metal hydride batteries, lithium batteries have become the mainstream energy source of electric vehicles due to their moderate energy density and power density, but the existing lithium battery technology still cannot effectively improve the driving range of electric vehicles; fuel Batteries have the advantages of large energy and environmental protection, and have been valued by domestic and foreign automobile manufacturers and research institutions. However, the low power density and long start-up characteristics of fuel cells affect their popularization and application in the field of electric vehicles; electric flywheel batteries With the advantages of high power density and high energy conversion eff...

AI Technical Summary

Problems solved by technology

[0002] Compared with lead-acid batteries and nickel-metal hydride batteries, lithium batteries have become the mainstream energy source of electric vehicles due to their moderate energy density and power density, but the existing lithium battery technology still cannot effectively improve the driving range of electric vehicles; fuel Batteries have the advantages of large energy and environmental protection, and have been valued by domestic and foreign automobile manufacturers and research institutions. However, the low power density and long start-up characteristics of fuel cells affect their popularization and application in the field of electric vehicles; electric flywheel batteries With the advantages of high power density and high energy conversion efficiency, it can realize instantaneous high-power driving or braking. It is an ideal power energy storage component. However, the energy density of electric flywheels is low, and the ability of continuous energy release or feedback poor

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