Distribution method for electric braking force of electric automobile

Abstract

The invention discloses a distribution method for an electric braking force of an electric automobile. The distribution method comprises the following steps: firstly, acquiring driving information and vehicle information of a driver; secondly, analyzing acquired driving information and vehicle information by a big data platform; thirdly, transmitting analyzed driving behavior characteristics to a vehicle control unit; fourthly, calculating an energy recovery efficiency distribution rule by the vehicle control unit; fifthly, identifying an electric braking force torque under a current braking state according to the driving behavior characteristics; sixthly, calculating a compensated braking torque according to the driving behavior characteristics; and seventhly, finally determining an actual braking torque. The driving behavior of the driver are acquired by big data analysis, and the electric braking force is distributed according to the driving behavior characteristics of the driver, energy recovery efficiency and battery parameters, thereby enabling more electric braking force distribution curves to fall in a high efficiency area, and ensuring the maximization of energy recovery. Meanwhile, the safety of a battery and the driving feeling of the driver are also considered, and the safety and the comfortableness in a braking process of the vehicle are guaranteed.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an electric braking force distribution method for electric vehicles. Background technique [0002] With the worsening of environmental pollution, people have a demand for electric vehicles with zero emissions. Coupled with the vigorous promotion of the government, electric vehicles have become more and more popular. In order to improve the driving range of electric vehicles, energy recovery is generally carried out during braking or coasting, but there are also problems such as the energy recovery is not maximized, affecting vehicle comfort and battery safety. [0003] Existing technical solutions: [0004] 1. Taxi energy recovery scheme [0005] When the vehicle is running, when the driving pedal is released, the motor outputs a constant reverse torque for energy recovery. [0006] 2. Brake energy recovery scheme: [0007] When the brake pedal is stepped on, the motor output...

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Problems solved by technology

[0009] 1. For the coasting energy recovery scheme, the constant reverse torque is generally small, and the energy that can be recovered is limited. At the same time, the choice of constant directional torque is not suitable, and it will also affect the comfort of the vehicle

[0010] 2. For the braking energy recovery scheme, the scheme does not consider the driver's driving behavior, which affects the driver's driving habits, and the energy recovery has not been maximized

[0011] 3. Both schemes do not consider the recovery efficiency of the energy recovery system, and the energy recovery is not maximized

[0012] 4. Both solutions ignore battery safety

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