Energy storage and drive devices that can be applied to hybrid vehicles

Abstract

The invention relates to an energy storage and driving device applicable to a hybrid vehicle; it comprises an engine, a first clutch, a first motor / generator, a power distribution mechanism, a flywheel module, a second clutch and a power output device; the power distribution mechanism It is a single-row planetary gear transmission; the flywheel module includes a flywheel speed-increasing driving gear, at least one flywheel speed-increasing driven gear meshing with the flywheel speed-increasing driving gear, at least one flywheel, at least one flywheel shaft and at least one Flywheel brake; the power output device includes a deceleration driving gear, a deceleration driven gear, a deceleration driven gear shaft, a speed change device, and a power output shaft; it solves the problems of low braking energy recovery efficiency and poor acceleration performance; braking energy recovery High efficiency, high acceleration, low vehicle cost and remarkable energy saving effect.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to an energy storage and drive device applicable to hybrid electric vehicles. 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 is causing human beings to fall into a double crisis of resources and the environment. Automobiles have gradually become the development trend of the industry. [0003] A hybrid electric vehicle (HEV) is a vehicle driven by an engine and a motor system. It conforms to the mainstream development direction of environmental protection and high efficiency. According to the number of power sources and power transmission methods, it can be divided into series type, parallel type (PHEV) and hybrid type. type. Energy sto...

AI Technical Summary

Problems solved by technology

[0006] However, the current braking energy feedback technology has many shortcomings, because the amount of feedback energy is limited by the vehicle's driving conditions 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 control functions such as forward and reverse and electric braking. However, 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 efficiency of the recycling process of braking energy feedback is not high, because the recovered kinetic energy passes through the The generator is converted into electrical energy, then converted into chemical energy, and then converted from chemical energy into electrical energy and kinetic energy when it is reused. Considerable losses will occur in the two energy conversion processes, which leads to insufficient energy saving effect of the whole vehicle

[0007] 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. There are problems such as poor dynamic performance, poor acceleration performance, and insufficient high-speed overtaking ability

In the Chinese patent CN201120235061.8, a driving device that uses a flywheel to improve the braking energy recovery rate is provided, but there are still problems of poor acceleration performance and insufficient high-speed overtaking ability

In the Chinese patent CN200980142123.6, a flywheel energy storage system is provided, which can quickly meet the energy storage demand in a high-load environment while reducing energy loss, but there are also problems of poor acceleration performance, insufficient high-speed overtaking ability, and high energy saving costs. Problem; Chinese patent CN200980151936.1 provides a flywheel module and a method for storing and transferring energy in the flywheel module, which is simpler and more cost-effective than the flywheel module in the existing drive system, but has poor acceleration performance and high speed The problem of insufficient overtaking ability

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