Electric-hydro complex brake control method for electric vehicle use and controlling device thereof

Abstract

The invention discloses a brake control method for an electric vehicle use and a controlling device thereof, and belongs to the technical field of electric vehicles. The controlling device comprises wheels, wheel brakes, an electric-hydro complex brake ECU, a brake pedal, a brake pedal position sensor, a hydraulic control module, a hydraulic braking system, a motor, a battery, a vehicle speed sensor, a motor control module, an ABS control module, and wheel speed sensors. The method comprises the following steps: determining the braking purpose of a driver according to the driving state, the braking strength, and the state of the motor and the battery of the electric vehicle, determining and choosing a braking mode according to the braking purpose, the battery SOC value, and the state of the ABS, and conducting coordination control for the motor regenerative braking and the hydraulic braking to allow the electric vehicle to provide an excellent braking experience for the driver on the basis of guaranteeing the braking safety. Therefore, under the premise that the braking efficiency can be guaranteed, braking energies are recycled by utilizing the regenerative braking of the motor, and the energy utilization efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and relates to a braking system control method of the electric vehicle, in particular to a combined control method of motor feedback braking and hydraulic braking for the electric vehicle. Background technique [0002] With the aggravation of energy problems and environmental problems, the research and application of electric vehicles is of great significance. Improving the driving range of electric vehicles has become a research hotspot of electric vehicles. Traditional internal combustion engine vehicles use a hydraulic braking system, and the braking energy is lost in the form of heat through friction during braking, and the braking energy cannot be recovered. If the electric vehicle only relies on the motor for feedback braking, the braking energy will be recovered in the form of electric energy, but there is a disadvantage of insufficient braking efficiency. Therefore, the combin...

AI Technical Summary

Problems solved by technology

Traditional internal combustion engine vehicles use a hydraulic braking system, and the braking energy is lost in the form of heat through friction during braking, and the braking energy cannot be recovered

If the electric vehicle only relies on the motor for feedback braking, the braking energy will be recovered in the form of electric energy, but there is a disadvantage of insufficient braking efficiency

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