Electromechanical flywheel hybrid power system of electric automobile and energy recovery control method thereof

Abstract

The invention discloses an electromechanical flywheel hybrid power system of an electric automobile. The electromechanical flywheel hybrid power system comprises a speed reduction device, a differential mechanism, an electric drive stepless speed change device, an electromechanical flywheel energy storage device, an electric drive stepless speed change device controller, an electromechanical flywheel energy storage device controller and a battery. The electric drive stepless speed change device dynamically couples a first motor, a power input shaft and a flywheel together, the control strategyis simple, power distribution is reasonable and effective, transmission is stable and efficient, the jerking feeling during mechanical braking is reduced, and the whole vehicle comfort can be effectively improved. Energy stored by the flywheel can directly output kinetic energy or be stored in the battery or directly drive an adjustable-speed motor, the rotating speed and torque of a gear ring and the flywheel are controlled through the electric drive stepless speed change device controller and the electromechanical flywheel energy storage device controller respectively, and adjustment of therotating speed and torque of the power input shaft is achieved to meet different driving requirements.

Description

technical field [0001] The invention belongs to the energy recovery and utilization technology in the field of electric vehicle engineering, and relates to an electromechanical flywheel hybrid power system of an electric vehicle and an energy recovery control method thereof. Background technique [0002] At present, the cost of power batteries is still one of the key factors restricting the development of the pure electric and hybrid vehicle market. The service life of the electrochemical energy storage system directly affects the recovery of braking energy and its reuse efficiency. Although power battery technology is developing rapidly, it is still not suitable for charging and discharging under high power conditions. First of all, under urban working conditions with frequent braking and acceleration, the power battery is repeatedly charged and discharged, which reduces its service life; secondly, when the car is accelerating or running uphill, if the power battery is the ...

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Problems solved by technology

[0004] In order to solve the defect that the energy recovery efficiency and manufacturing cost of the electromechanical flywheel hybrid system of electric vehicles cannot be balanced in the prior art, an electric vehicle electromechanical system with high braking energy recovery efficiency, good acceleration performance, low manufacturing cost and remarkable energy saving effect is provided. flywheel hybrid system

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