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Electric vehicle and electric vehicle sliding energy recovery method and recovery system

An energy recovery, electric vehicle technology, applied in electric braking systems, electric vehicles, power management and other directions, can solve the problems of reduced coasting energy recovery rate, safety hazards, etc., and achieve the effect of avoiding safety hazards and recovering more torque

Active Publication Date: 2022-05-31
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides an electric vehicle and an electric vehicle coasting energy recovery method and recovery system to solve or partially solve the problem that the current electric vehicle's coasting energy recovery torque curve is only related to the vehicle speed, so under different road conditions and vehicle conditions, the coasting energy recovery is caused. The rate is reduced, and there are technical problems with certain potential safety hazards

Method used

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  • Electric vehicle and electric vehicle sliding energy recovery method and recovery system
  • Electric vehicle and electric vehicle sliding energy recovery method and recovery system
  • Electric vehicle and electric vehicle sliding energy recovery method and recovery system

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Embodiment Construction

[0071] In general, the present embodiment provides a method for recovering coasting energy of an electric vehicle, which is

[0073] Determine the second mapping relationship of vehicle speed and coasting energy recovery torque; wherein, the second mapping relationship includes N

[0079] determine the first vehicle speed V1, the second vehicle speed V2 and the third vehicle speed V3, V1

[0080] When determining the first vehicle speed V1, the corresponding value of the first coasting energy recovery torque is 0; in the second vehicle

[0085] After determining the peak value T2 of the coasting energy regenerative torque, determine the relationship with the vehicle speed in combination with V1, V2 and V3.

[0088] First, the vehicle speed V is divided into a one-dimensional array of N=6 vehicle speed values, which are respectively [0 10 20 40 80 100],

[0090]

[0095] According to the first recovery energy coefficient Kuser, the target coasting energy recovery torque is co...

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Abstract

The invention discloses a sliding energy recovery method of an electric vehicle, comprising: when the electric vehicle satisfies a preset state, acquiring the vehicle speed and the vehicle speed change rate of the electric vehicle; The first mapping relationship; according to the vehicle speed and the vehicle speed change rate, determine the target coasting energy recovery torque from the first mapping relationship; according to the target coasting energy recovery torque, perform energy recovery control on the electric vehicle; wherein, the first mapping relationship satisfies : When the vehicle speed change rate>0, the coasting energy recovery torque decreases as the vehicle speed change rate increases; when the vehicle speed change rate<0, as the absolute value of the vehicle speed change rate increases, the coasting energy recovery The torque is increased; the above method can improve the total amount of coasting energy recovery under specific road conditions and vehicle conditions and eliminate corresponding safety hazards.

Description

Electric vehicle and electric vehicle coasting energy recovery method and recovery system technical field The application relates to the technical field of new energy vehicles, in particular to a kind of electric vehicle and electric vehicle gliding energy recovery [0001] Collection methods and recycling systems. Background technique [0002] The coasting energy recovery mode of an electric vehicle is usually: when the speed of the electric vehicle is greater than a certain value, no brake is applied. and the accelerator pedal, when the vehicle allows energy recovery, the vehicle controller VCU sends negative torque to the motor controller MCU, that is The energy recovery torque, the motor controller MCU controls the motor to generate electricity, and generates a force opposite to the driving direction to decelerate the vehicle. In the current energy recovery scheme, the energy recovery torque is only a curve related to the speed of the vehicle, under any road conditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/18
CPCB60L7/18B60L2240/12B60L2240/14B60L2240/423Y02T10/72
Inventor 骆铁平方强胡诗晨何思张敬伟
Owner DONGFENG MOTOR CORP HUBEI
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