Energy feedback control method and control system for electric vehicle provided with multispeed transmission

Abstract

The invention provides an energy feedback control method and a control system for an electric vehicle provided with a multispeed transmission. A brake pedal sensor, an acceleration pedal sensor, a vehicle speed sensor and a motor sensor transmit brake signals, acceleration signals, vehicle speed and motor output conditions to an energy feedback control device, the energy feedback control device judges whether energy is fed back or not according to received information, and the energy feedback control device feeds back the energy according to data in real-time communication with a motor controller, recovers the energy and stores the energy into an energy storage system through a conduction device if energy feedback is needed. The energy of the electric vehicle provided with the multispeed transmission is fed back according to different gears and different conditions of the vehicle, energy recovery rate is maximized, and an energy feedback device for the electric vehicle provided with the multispeed transmission is implemented without affecting vehicle comfort or adding a motor.

Description

technical field [0001] The invention relates to the field of energy feedback of electric vehicles, in particular to an energy feedback control method and a control system for an electric vehicle equipped with a multi-stage gearbox. Background technique [0002] At present, when electric vehicles do not use multi-stage gearboxes, the demand for electric vehicles on the drive motor requires that the drive motor has the characteristics of large torque, high speed, and high efficiency. With the development of electric vehicles, the demand for drive motors The performance is getting higher and higher, and the design and manufacturing cost of the drive motor remains high. In some fields, electric vehicles have begun to use multi-stage gearboxes. The use of multi-stage gearboxes can reduce the performance requirements of the vehicle for the drive motor, thereby controlling costs. Multi-stage transmission The use of the box makes the electric vehicle have multiple drive ratios. When...

AI Technical Summary

Problems solved by technology

[0002] At present, when electric vehicles do not use multi-stage gearboxes, the demand for electric vehicles on the drive motor requires that the drive motor has the characteristics of large torque, high speed, and high efficiency. With the development of electric vehicles, the demand for drive motors The performance is getting higher and higher, and the design and manufacturing cost of the drive motor remains high. In some fields, electric vehicles have begun to use multi-stage gearboxes. The use of multi-stage gearboxes can reduce the performance requirements of the vehicle for the drive motor, thereby controlling costs. Multi-stage transmission The use of the box makes the electric vehicle have multiple drive ratios. When energy feedback is performed on an electric vehicle equipped with a multi-stage gearbox, it will inevitably encounter energy feedback, which will cause the vehicle to have different decelerations in different gears, thus losing comfort, making The maximization of energy return rate and driving comfort cannot be jointly resolved

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