Control method of maximum energy recovery when electric vehicle brakes

An electric vehicle, maximum energy technology, applied in the direction of electric vehicles, electric braking systems, vehicle components, etc., can solve the problems of low energy recovery utilization rate and maximum energy recovery rate of less than 20%

Active Publication Date: 2014-07-23
华晨新日新能源汽车有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing regenerative braking control method cannot meet the driver's braking demand while ensuring the safety of vehicl...

Method used

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  • Control method of maximum energy recovery when electric vehicle brakes
  • Control method of maximum energy recovery when electric vehicle brakes
  • Control method of maximum energy recovery when electric vehicle brakes

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0028] As shown in the figure, the control method for maximum energy recovery when the electric vehicle brakes includes a calculation and decision-making module 1 for obtaining the driver's braking signal, the calculation and decision-making module 1 and the motor controller 4, supercapacitor system 2, power battery system 3, The road surface sensing module 8 is cooperatively connected, the motor controller 4 is cooperatively connected with the motor 5, the supercapacitor system 2, and the power battery system 3, the motor 5 is cooperatively connected with the road surface sensing module 8, and the mechanical transmission system 6, and the mechanical transmission system 6 is used to control the tires 7 rotates, and the road surface perception module 8 is arranged on the tire 7; The calculation method of the calculation decision module 1 is an existing...

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Abstract

The invention discloses a control method of the maximum energy recovery when an electric vehicle brakes and belongs to the technical field of electric vehicles. The control method is characterized by comprising the following steps that (1), a calculation decision module of a vehicle control unit calculates needed brake torque according to the current state of the vehicle and the current road state, and the obtained brake torque is analyzed and processed according to the following situations; (2), according to the analysis result, through the coordinated logic control over the brake torque according to the brake process, the control over the maximum energy recovery when the electric vehicle brakes is finished finally. According to the control method of the maximum energy recovery when the electric vehicle brakes, the utilization rate of recovered energy of the electric vehicle is improved to be 50% from 20%, the driving range is increased by 75%, and the safety performance is ensured when the electric vehicle brakes; the road state can be sensed dynamically, the brake requirement by a driver is met in real time, the brake torque is adjusted, the brake requirement of the vehicle is met, and safety is ensured.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, in particular to a control method for maximum energy recovery when the electric vehicle brakes. Background technique [0002] With the increasing number of automobiles worldwide, the problems of energy crisis, environmental pollution and traffic safety brought to the society are becoming more and more serious. As an effective means to alleviate the pressure on the environment and resources, electric vehicles have achieved great development in recent years. As one of the cores of electric vehicles, the regenerative braking technology with the motor as the carrier is the key to realize its energy saving. [0003] When determining the braking torque that can be provided by a motor braking system controlled by a motor controller (MCU, Motor Control Unit), many factors often need to be considered. The existing regenerative braking control method cannot guarantee the safety of vehicle braki...

Claims

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Application Information

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IPC IPC(8): B60L7/10
Inventor 周华丰张文华马关金
Owner 华晨新日新能源汽车有限公司
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