Method and device for recovering energy from an electric vehicle

A technology for energy recovery and electric vehicles, which is applied in the direction of electric vehicles, electric braking systems, vehicle components, etc., can solve the problems that cannot meet the requirements of energy recovery rate, etc., so as to prolong the service life and maintenance costs, reduce operating costs, reduce The effect of energy consumption

Active Publication Date: 2016-09-07
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is characterized by a relatively simple structure, but it cannot meet the requirements of the energy recovery rate of the increasingly mature electric vehicle technology.

Method used

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  • Method and device for recovering energy from an electric vehicle
  • Method and device for recovering energy from an electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] figure 1 It is a flow chart of an electric vehicle energy recovery method provided in Embodiment 1 of the present invention. Such as figure 1 As shown, a kind of electric vehicle energy recovery method described in the present invention comprises:

[0048] Obtain the accelerator opening information of the electric vehicle, and judge whether the accelerator pedal is depressed;

[0049] If the accelerator pedal is not depressed, obtain the slope information of the road the electric vehicle is driving to determine whether the electric vehicle is traveling uphill;

[0050] If the electric vehicle is not traveling uphill, the depth position u of the brake pedal of the electric vehicle, the current vehicle running speed V and the current remaining power SOC of the power battery of the electric vehicle are collected;

[0051] Determine the energy recovery power W3 according to the depth position u of the brake pedal, the current vehicle running speed V and the current remai...

Embodiment 2

[0069] figure 2 It is a schematic structural diagram of an electric vehicle energy recovery device provided in Embodiment 2 of the present invention. This embodiment is based on the same idea as the above-mentioned embodiment of the energy recovery method for an electric vehicle. For details not described in detail in this embodiment, reference may be made to the above-mentioned embodiment. Such as figure 2 As shown, a kind of electric vehicle energy recovery device described in the present invention comprises:

[0070] Accelerator judging unit, used to obtain information on the accelerator opening of the electric vehicle, and judge whether the accelerator pedal is depressed;

[0071] The uphill judging unit is used to obtain the slope information of the road on which the electric vehicle is traveling if the accelerator pedal is not depressed, and judge whether the electric vehicle is traveling uphill;

[0072] The data acquisition unit is used to collect the brake pedal ...

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Abstract

The invention relates to the technical field of electric vehicle energy recovery, in particular to an electric vehicle energy recovery method and device. The present invention firstly judges whether the accelerator pedal is stepped on and whether the vehicle is traveling uphill. When the accelerator pedal is not stepped on and the vehicle is not traveling uphill, it is used as a precondition for energy recovery. When calculating the amount of energy recovery, factors such as the depth position of the brake pedal u, the current vehicle speed V, the remaining power SOC, and the downhill slope are comprehensively considered to determine the recovery power more accurately; due to the consideration of the remaining power of the power battery, it is possible to avoid overcharging the battery Damage to the battery; on the premise of ensuring the comfort of the vehicle when it is running, it can maximize the recovery of energy, reduce the energy consumption of the vehicle, reduce the operating cost, prolong the service life of the battery and the maintenance cost, and solve the problem of the long battery life of the electric vehicle. The short problem is to realize the efficient use of energy.

Description

technical field [0001] The invention relates to the technical field of electric vehicle energy recovery, in particular to an electric vehicle energy recovery method and device. Background technique [0002] Braking energy recovery is one of the ways for electric vehicles to improve energy usage. It can convert the kinetic energy of the electric vehicle when braking into the electric energy storage of the battery through the electric motor, and then use it in the traction drive, avoiding the loss of energy into frictional heat energy, thereby improving the efficiency of energy use and increasing the electric energy. The mileage of the car. [0003] The control method of the existing braking energy recovery system is generally to apply a fixed braking torque to the drive shaft when the car is braking, or to apply a fixed braking torque based on a fixed torque after being corrected by the engine speed or vehicle speed. to the drive shaft for energy recovery. The characterist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/10
Inventor 戴贤青李革臣朱锦其龚立秋
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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