Double-motor hybrid power system for pure electric automobile

Abstract

The invention discloses a double-motor hybrid power system for a pure electric automobile. A double-motor and double-battery mode is used in the system. The system comprises a battery A, a controller A, a motor A, a battery B, a controller B, a motor B, a linkage device, a transmission device and an axle differential wheel, wherein the battery A and the battery B are connected with the controller A and the controller B respectively; the controller A and the controller B are connected with the motor A and the motor B respectively; the motor A and the motor B are connected with the linkage device; the linkage device is connected with the transmission device; and the transmission device is connected with the axle differential wheel. In the system, two sets of batteries are used for cooperative operation; when the energy of one set of battery is lower than a certain value, the system can be automatically switched to the other set of battery, so that the phenomena of anchoring on the road, over-discharge of the batteries and the like are prevented, and a main motor is kept to be operated in a high-efficient area; and the system has the advantages of high energy recovery rate, high utilization rate, long continuous driving distance, long service life of the batteries and the like.

Description

technical field [0001] The invention relates to the field of drive systems of electric vehicles, in particular to a dual-motor hybrid power system of pure electric vehicles. Background technique [0002] With the development of the global economy, the consumption of petroleum resources is increasing day by day. Petroleum is a non-renewable resource. How to reduce its consumption has become an important issue. At this time, people are paying more and more attention to replacing fuel vehicles with electric vehicles. A set of powertrain system includes controller, motor, battery pack and gearbox. The power system is powered by a single battery pack. The motor control technology and the characteristics of the motor itself determine that the motor can only get better performance when it works near the rated speed. High working efficiency, this area is called the high-efficiency area. If the motor is kept working in this area, the energy utilization rate of electric vehicles will ...

AI Technical Summary

Problems solved by technology

Existing pure electric vehicles generally adopt brake braking power feeding technology, and the braking kinetic energy is fed back to the battery through the back dragging of the motor. This feeding method is due to the excessive current in the high-speed area during braking, and when the motor is back dragging, if all energy is to be recovered , the motor current is too large, far beyond the capacity of

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