Distributed electric drive vehicle energy recovery method and device and electric vehicle

Abstract

The invention provides a distributed electric drive vehicle energy recovery method which is applied to a vehicle control unit, and the working condition of a vehicle is determined by obtaining the current accelerator pedal opening degree and the current brake pedal opening degree, such as the non-emergency braking working condition or the emergency braking working condition. The current brake control strategy corresponding to the current accelerator pedal opening degree and the current brake pedal opening degree is determined from a pre-stored strategy table, and different brake control strategies can correspond to different principles for controlling a hub motor and a brake cylinder; and finally, the wheel hub motor and the brake wheel cylinder are controlled according to the determined current brake control strategy, so that the most suitable energy recovery mode is executed according to different working conditions of the vehicle, the vehicle energy is directly recovered at the end of the wheel hub motor, the vehicle energy is prevented from being consumed at a transmission shaft or a speed reducer in the middle, the energy recovery efficiency is improved while the braking requirement is met, and the endurance distance of the electric vehicle is prolonged.

Description

technical field [0001] The present application relates to the technical field of electric vehicles, in particular to a method and device for recovering energy from distributed electric-driven vehicles and an electric vehicle. Background technique [0002] At present, with the rapid economic development of human society, non-renewable resources such as petroleum energy are facing the threat of depletion, and environmental pollution is becoming more and more serious. Therefore, as an alternative to fuel vehicles, electric vehicles are receiving more and more global attention. [0003] The drive mode adopted by most electric vehicles at present is a centralized drive mode, that is, a driving motor provides a centralized source of driving force, and the output end of the driving motor transmits torque to the wheels through a transmission shaft and a mechanical reducer. [0004] In the process of implementing the present application, the inventors found that the relevant technol...

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Problems solved by technology

[0004] In the process of implementing the present application, the inventors found that the relevant technologies have at least the following problems: for electric vehicles using centralized electric drive, when the vehicle is braking, most of the energy will be consumed in the reducer and the intermediate In the transmission link, the energy recovery efficiency of the vehicle is low

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