Braking energy recovery self-adaptive control method of electric automobile

A braking energy recovery and adaptive control technology, applied in electric vehicles, control drive, vehicle components, etc., can solve the problems of electric vehicle battery damage, poor controllability of battery pack charging, and reduced battery life

Inactive Publication Date: 2013-03-06
SOUEAST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing braking energy recovery process of electric vehicles, the controllability of charging the battery pack is not strong, especially the power battery system an...

Method used

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  • Braking energy recovery self-adaptive control method of electric automobile
  • Braking energy recovery self-adaptive control method of electric automobile
  • Braking energy recovery self-adaptive control method of electric automobile

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Embodiment Construction

[0017] see figure 1 with figure 2 As shown in the figure, there is an adaptive control method for electric vehicle braking energy recovery. The method is equipped with a vehicle controller (VCU), a battery management system device (BMS) responsible for detecting the battery status of the electric vehicle, and a motor controller. (i.e. MCU) and an angle position sensor installed on the brake pedal of the electric vehicle; the vehicle controller is respectively connected with the battery management system device, the motor controller, and the angle sensor;

[0018] The method specifically includes the following steps:

[0019] Step 10. After stepping on the brake pedal of the electric vehicle, the vehicle controller judges whether the battery is faulty according to the current battery voltage and current fed back by the battery management system device; , temperature to calculate the charging power of the battery; if the battery is faulty, determine the charging power of the ...

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Abstract

The invention provides a braking energy recovery self-adaptive control method of an electric automobile. The braking energy recovery self-adaptive control method comprises the following steps that after a braking pedal of the electric automobile is treadpedaled, a vehicle controller judges whether a battery is in fault or not according to voltage and current of the existing battery fed back by a battery management system so as to determine the charge power of the battery; a charge torque value is acquired according to the charge power and a rotation speed of a motor; the vehicle controller determines a maximum allowable braking torque value according to the temperature of the motor and the rotation speed of the motor; an energy recovery torque value of a braking system is acquired according to the charge torque value and the maximum allowable braking torque value; an angle sensor acquires a moment coefficient value K; a feedback torque value of the motor is acquired by multiplying the moment coefficient value K by the energy recovery torque value of the braking system; and the vehicle controller controls the recovered current generated when the electric automobile is braked according to the feedback torque value of the motor so as to finish the control ion braking energy recovery. The braking energy recovery self-adaptive control method of the electric automobile, disclosed by the invention, has the advantages of being compatible considering both of a power battery and a motor system, enabling braking recovery current to be controllable and improving the driving range of the electric automobile.

Description

【Technical field】 [0001] The invention relates to the field of complete electric vehicle control, in particular to an adaptive control method for electric vehicle braking energy recovery. 【Background technique】 [0002] In the existing braking energy recovery process of electric vehicles, the controllability of charging the battery pack is not strong, especially the power battery system and motor system of the whole vehicle cannot be coordinated comprehensively, which may easily cause damage to the battery of the electric vehicle and reduce the service life of the battery . 【Content of invention】 [0003] The technical problem to be solved by the present invention is to provide an adaptive control method for electric vehicle braking energy recovery to improve the charging controllability of the battery pack during braking. [0004] The present invention is achieved in the following way: an adaptive control method for electric vehicle braking energy recovery, the method is...

Claims

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Application Information

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IPC IPC(8): B60L7/10B60L15/00
Inventor 邓冠丰
Owner SOUEAST
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