CN-121973638-A - Braking energy recovery control method, system, product, medium and vehicle

CN121973638ACN 121973638 ACN121973638 ACN 121973638ACN-121973638-A

Abstract

The application provides a braking energy recovery control method, a braking energy recovery control system, a braking energy recovery control product, a braking energy recovery control medium and a vehicle, wherein the braking energy recovery control method comprises the following steps of obtaining a speed signal, a gear signal, a pedal signal and a plectrum signal of the vehicle; determining an energy recovery torque base value based on the vehicle speed signal, the gear signal, and the pedal signal; determining an energy recovery torque compensation value based on the paddle signal, the paddle maximum resistance value, and the paddle minimum resistance value; the method, the system, the product, the medium and the vehicle can realize stepless energy recovery intensity adjustment, and improve the operation flexibility and the driving comfort.

Inventors

MA ZHIYUAN
WU KAI
XIAO FEI
TIAN HUA
ZHANG YUNHANG
FAN PING

Assignees

上汽通用汽车有限公司
泛亚汽车技术中心有限公司

Dates

Publication Date: 20260505
Application Date: 20260211

Claims (10)

1. A braking energy recovery control method for a vehicle, characterized by comprising the steps of: Acquiring a speed signal, a gear signal, a pedal signal and a plectrum signal aiming at an energy recovery plectrum of the vehicle; Determining an energy recovery torque base value based on the vehicle speed signal, the gear signal, and the pedal signal; determining an energy recovery torque compensation value based on the paddle signal, the paddle maximum resistance value and the paddle minimum resistance value; determining a compensated total energy recovery torque value based on the energy recovery torque base value and the energy recovery torque compensation value; comparing the total energy recovery torque value with an energy recovery torque threshold value, determining an energy recovery torque demand value as the smaller one of the total energy recovery torque value and the absolute value of the energy recovery torque threshold value; Based on the energy recovery torque demand value, an energy recovery command is generated for execution of braking energy recovery of the vehicle.
2. The braking energy recovery control method according to claim 1, wherein the maximum resistance value of the plectrum is a learning value of the maximum resistance of the plectrum obtained through a self-learning process of the resistance value of the plectrum, the self-learning process of the resistance value of the plectrum comprising the steps of: after the vehicle is electrified, monitoring whether a self-learning condition is met; When the self-learning condition is met, starting timing, and enabling a plectrum learning process value to catch up with a plectrum maximum resistance measured value with a first preset slope until the plectrum learning process value reaches and stabilizes at the plectrum maximum resistance measured value; When the timing reaches a preset time, the plectrum learning process value is assigned to the plectrum learning calibration value, the plectrum learning final value is enabled to catch up with the plectrum learning calibration value with a second preset slope, and when the plectrum learning final value reaches and is stabilized at the plectrum learning calibration value, the plectrum learning final value is output as the plectrum maximum resistance learning value.
3. The braking energy recovery control method according to claim 2, wherein the self-learning condition is that a current resistance value indicated by the paddle signal is greater than or equal to a predetermined resistance threshold value, and a rate of change of the current resistance value is less than or equal to a predetermined rate of change of resistance.
4. A braking energy recovery control method according to claim 3, wherein the predetermined resistance threshold is 80% to 90% of a theoretical maximum resistance value of the plectrum.
5. The braking energy recovery control method according to claim 1, wherein determining the energy recovery torque compensation value includes determining a resistance percentage based on the paddle signal, the paddle maximum resistance value, and the paddle minimum resistance value, and determining the energy recovery torque compensation value by looking up a data map according to the resistance percentage.
6. A braking energy recovery control system for performing the braking energy recovery control method according to any one of claims 1 to 5, the braking energy recovery control system comprising: An energy recovery paddle that outputs the paddle signal that varies with an operation of a driver; a pedal device that outputs the pedal signal indicating a state of the pedal device; A shift lever that outputs the shift signal indicating a shift position of the shift lever; A control device configured to generate an energy recovery instruction based on the received plectrum signal, pedal signal, and gear signal; And an energy recovery device that performs braking energy recovery according to the received energy recovery instruction.
7. The braking energy recovery control system according to claim 6, wherein the energy recovery paddle is a slide rheostat device mounted on a steering wheel of the vehicle.
8. A computer program product comprising a computer program, characterized in that the computer program, when executed, implements the braking energy recovery control method according to any one of claims 1 to 5.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the braking energy recovery control method according to any one of claims 1 to 5.
10. A vehicle comprising an energy storage device and the braking energy recovery control system according to claim 6 or 7, wherein the energy recovery device stores recovered energy in the energy storage device of the vehicle when braking energy recovery is performed.

Description

Braking energy recovery control method, system, product, medium and vehicle Technical Field The present application relates to the field of vehicle braking energy recovery control technology, and in particular, to a braking energy recovery control method for a vehicle, a braking energy recovery control system for executing the control method, a computer product, a computer-readable storage medium, and a vehicle including the control system. Background When the new energy vehicle decelerates or slides, the energy recovery device is used for recovering braking energy, and the energy recovery device is used for converting kinetic energy in the process of decelerating or sliding the vehicle into electric energy and storing the electric energy, so that the energy utilization efficiency of the vehicle is improved, and the endurance mileage is prolonged. To match different driving scenarios, the vehicle may be equipped with an energy recovery intensity adjustment device providing a plurality of fixed intensity levels, however such preset intensity levels are adjusted to a hierarchical adjustment mode, which can only provide a two to three gear fixed recovery intensity selection, which is difficult to match exactly with the actual braking intent of the driver, e.g. the driver cannot flexibly adjust the recovery intensity according to his own driving style, specific road conditions (e.g. wet road, downhill road, front car deceleration, etc.). In addition, step change of braking force is easily triggered by switching of step adjustment, smoothness in a braking process is reduced, and driving comfort and driving stability are affected. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention To solve or at least alleviate one or more of the above problems, the following solutions are provided. According to a first aspect of the present application, there is provided a braking energy recovery control method for a vehicle, comprising the steps of: Acquiring a speed signal, a gear signal, a pedal signal and a plectrum signal aiming at an energy recovery plectrum of the vehicle; Determining an energy recovery torque base value based on the vehicle speed signal, the gear signal, and the pedal signal; determining an energy recovery torque compensation value based on the paddle signal, the paddle maximum resistance value and the paddle minimum resistance value; determining a compensated total energy recovery torque value based on the energy recovery torque base value and the energy recovery torque compensation value; comparing the total energy recovery torque value with an energy recovery torque threshold value, determining an energy recovery torque demand value as the smaller one of the total energy recovery torque value and the absolute value of the energy recovery torque threshold value; Based on the energy recovery torque demand value, an energy recovery command is generated for execution of braking energy recovery of the vehicle. Optionally, according to an embodiment of the present application, the paddle maximum resistance value is a paddle maximum resistance learning value obtained through a paddle resistance value self-learning process, and the paddle resistance value self-learning process includes the steps of: after the vehicle is electrified, monitoring whether a self-learning condition is met; When the self-learning condition is met, starting timing, and enabling a plectrum learning process value to catch up with a plectrum maximum resistance measured value with a first preset slope until the plectrum learning process value reaches and stabilizes at the plectrum maximum resistance measured value; When the timing reaches a preset time, the plectrum learning process value is assigned to the plectrum learning calibration value, the plectrum learning final value is enabled to catch up with the plectrum learning calibration value with a second preset slope, and when the plectrum learning final value reaches and is stabilized at the plectrum learning calibration value, the plectrum learning final value is output as the plectrum maximum resistance learning value. Alternatively, according to one embodiment of the present application, the self-learning condition is that a current resistance value indicated by the paddle signal is greater than or equal to a predetermined resistance threshold value and a rate of change of the current resistance value is less than or equal to a predetermined rate of change of resistance. Alternatively, according to one embodiment of the present application, the predetermined resistance threshold is 80% to 90% of a theoretical maximum resistance value of the paddle. Optionally, according to one embodiment of the present application, determi