A method for distributing electric braking force of an electric vehicle

Abstract

The invention discloses a method for distributing electric braking force of an electric vehicle, comprising the following steps: 1) collecting the driver's driving information and vehicle information; 2) analyzing the collected driving information and vehicle information through a big data platform; 3) analyzing the driving information The behavior characteristics are sent to the vehicle controller; 4) The vehicle controller calculates the distribution law of energy recovery efficiency; 5) Identify the electric braking torque under the current braking state according to the driving behavior characteristics; 6) Calculate the compensation system according to the driving behavior characteristics Power torque; 7) Finally determine the actual braking torque, and obtain the driver's driving behavior through big data analysis. The electric braking force is distributed according to the driver's driving behavior characteristics, energy recovery efficiency and battery parameters, so that more electric braking force distribution curves It falls in the high-efficiency zone to ensure the maximum recovery of capacity. At the same time, battery safety and the driver's driving experience are also taken into account to ensure the safety and comfort of the vehicle braking process.

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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