Driving device of new energy automobile

Abstract

The invention relates to a driving device of a new energy automobile. The driving device comprises a main driving device. A power output shaft of a first electromotor / generator of the main driving device is connected with a wheel axle speed change mechanism in a power transmission mode. The driving device further comprises a reinforcement energy-saving drive device. The reinforcement energy-saving drive device comprises a flywheel, a dynamic coupling transmission assembly, and a second electromotor / generator. The flywheel corresponds to a flywheel brake during assembly, and is connected with a flywheel axle in a power transmission mode. The dynamic coupling transmission assembly comprises a gear ring, a planetary gear, a planet carrier and a sun wheel, the gear ring is connected with the flywheel axle in a power transmission mode, and the planet carrier is connected with the power output shaft of the first electromotor / generator in a power transmission mode. A power output shaft of the second electromotor / generator is connected with the sun wheel in a power transmission mode. The driving device has the advantages of being high in braking energy recovery efficiency, energy-saving, environment-friendly and the like.

Description

technical field [0001] The invention relates to a drive device, in particular to a drive device for a new energy vehicle. Background technique [0002] Human beings are facing two major challenges: the gradual depletion of fossil energy and the deterioration of the environment caused by excessive reliance on fossil energy. The rapid development of traditional automobiles powered by petroleum energy has caused human beings to fall into a double crisis of resource scarcity and environmental degradation. Therefore, the development of energy-saving Environmentally friendly new energy vehicles have gradually become the development trend of the industry. The new energy vehicle mentioned above refers to a vehicle whose power source includes other power sources besides the engine. [0003] The braking of the car is achieved by the friction between the brake disc and the brake caliper or the brake drum and the brake shoe. During this process, the kinetic energy of the vehicle is di...

AI Technical Summary

Problems solved by technology

[0005] However, the current braking energy feedback technology has many shortcomings, because the amount of feedback energy is limited by the driving conditions of the vehicle and the state of the motor and battery

First of all, the existing braking energy feedback scheme usually requires charging the battery directly, but because the braking process time is mostly short, and there is a limitation that the battery charging rate cannot be too high, it is difficult for the battery to achieve short-term high-power charging; second , the performance requirements of the motor feedback braking energy are too high, and it is difficult to achieve arbitrary adjustment of the braking torque, which does not conform to people's operating habits for traditional brakes; third, although the super capacitor has high specific power, large specific energy, and It has many advantages such as energy storage, which can smooth the charging and discharging current of the power battery, but it is expensive and not easy to popularize; fourth, the operating conditions of electric vehicles require that the motor and transmission system have four-quadrant functions such as positive and negative rotation and electric braking. control function, but the existing electric braking methods and devices can only recover a small amount of energy at medium and high speeds, and the energy recovery rate is almost zero at low speeds; finally, the recycling process of braking energy feedback is not efficient because, The recovered kinetic energy is converted into electrical energy through the generator, and then converted into chemical energy, and then converted from chemical energy into electrical energy and kinetic energy when reused. These two energy conversion processes will cause considerable losses, thus leading to the energy-saving effect of the entire vehicle. Not obvious enough

[0006] In addition, due to the limitations of the space in the front cabin of the car and the center distance between the drive motor and the differential, the diameter of the electric vehicle motor should not be too large, and the cost of the power device of the motor controller is limited. At present, the peak torque of many electric vehicles is too small. Therefore, poor dynamic performance, poor acceleration performance, and insufficient high-speed overtaking ability lead to long acceleration time and insufficient high-speed overtaking ability

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