Electric vehicle energy recovery system and control method thereof

A technology of energy recovery and control methods, which is applied in electric braking systems, electric vehicles, control drives, etc.

Active Publication Date: 2013-04-10
CHERY AUTOMOBILE 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 current increasingly mature electric vehicle technology.

Method used

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  • Electric vehicle energy recovery system and control method thereof
  • Electric vehicle energy recovery system and control method thereof
  • Electric vehicle energy recovery system and control method thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] Embodiments of the present invention are described in detail below.

[0026] Such as figure 1 , an electric vehicle driven by the front wheel is taken as an example to specifically illustrate how the present invention works.

[0027] The electric vehicle energy recovery system of the present invention includes a motor: a driving motor or a generator separately loaded on the drive shaft can be used to apply braking torque to the drive shaft when the vehicle is braking to convert the kinetic energy of the vehicle into electrical energy ;Battery: convert the electrical energy provided by the motor into chemical energy and store it; Pressure sensor: collect the pressure signal of the brake master cylinder of the automobile hydraulic braking system and feed it back to the vehicle controller; The pressure signal of the motor is used to calculate the braking torque of the motor, and output the braking torque of the motor to the motor controller; the motor controller: receive...

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PUM

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Abstract

The invention discloses an electric vehicle energy recovery system and a control method thereof. On the basis of the pressure of a brake master cylinder of an electric vehicle, a maximal brake force Fm which is allowed to be applied to a current driving wheel is obtained by calculating according to a brake force distribution curve in an electric vehicle brake system design and a driving wheel locking curve when the electric vehicle travels on a road surface with an ideal synchronous surface adhesion coefficient; and the Fm is converted into a torque, namely a maximal motor brake torque which can be applied currently so that the overall vehicle energy of the electric vehicle can be recovered to the maximum. Simultaneously, the calculated brake torque is corrected according to the requirements on the drivability and the safety of a vehicle, so that brake energy can be recovered to the maximum on the premise of ensuring the drivability and the safety of the electric vehicle.

Description

Technical field [0001] The invention involves the field of electric vehicle energy recycling technology, which specifically involves a control method for an electric vehicle energy recovery system. Background technique [0002] Brake energy recycling is one of the ways for electric vehicles to increase energy usage.It can convert the kinetic energy of the car through the motor to the electrical storage of the battery through the motor, and then use it to the traction driver to avoid the loss of energy to friction thermal energy, thereby improving the efficiency of energy use, increasing electric vehiclesContinuing mileage. [0003] The control method of the existing braking energy recycling system is generally applied to a fixed braking torque to the drive shaft when the car is braking, or based on a fixed torque.Energy recycling on the driver shaft.The characteristics of this method are that the structure is relatively simple, but it does not meet the current increasingly matur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/10B60L15/20
CPCY02T10/72
Inventor 刘义强
Owner CHERY AUTOMOBILE CO LTD
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