CN-121973744-A - Electronic parking brake control method and device

CN121973744ACN 121973744 ACN121973744 ACN 121973744ACN-121973744-A

Abstract

The invention provides an electronic parking brake control method and device, which relate to the technical field of automobile safety, wherein when the power supply of a whole automobile is interrupted, a system cuts off the signal connection between an external wire harness control interface and a driving circuit in an actuating mechanism, triggers a built-in redundant power supply to switch into a discharging mode, independently supplies power to a motor and maintains parking locking until the power supply is restored to legal wake-up. The actuating mechanism integrates the redundant power supply, the H-bridge driving circuit and the motor, adopts high-strength PP material for injection molding and encapsulation, and covers all sensitive electrical connection points. According to the invention, through hardware gating isolation, an internal closed driving loop and physical protection design, the breaking actions such as reverse connection and shearing of an external wire harness are effectively blocked, parking locking is reliably maintained after the whole vehicle is powered down, the problem of poor anti-theft performance of the traditional electronic parking is solved, and the parking safety and system stability of the vehicle are improved.

Inventors

YAN ZHENGDONG
LIU HUIJIAN
FAN YIHONG
TIAN ZHEN
WANG WEIFENG
ZHANG CHAOHUI

Assignees

奇瑞汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260318

Claims (10)

1. An electronic parking brake control method, characterized by comprising: Responding to an interrupt signal of a whole vehicle power supply, and cutting off signal connection between an external wire harness control interface and a driving circuit in an electronic parking brake actuating mechanism; Triggering a redundant power supply built-in an executing mechanism to switch from a charging mode to a discharging mode based on the interrupt signal, and continuously supplying power to the driving circuit and driving a motor; And maintaining the locking state of the motor to the braking mechanism during the continuous power supply of the redundant power supply until the power supply of the current vehicle is restored and the preset wake-up condition is met.
2. The method of claim 1, wherein the step of disconnecting the external harness control interface from the drive circuit in the electronic parking brake actuator in response to an interrupt signal from the vehicle power source comprises: responding to a parking instruction sent by a user to control the vehicle to enter a complete power-down mode, and generating a complete vehicle power supply interruption signal; And triggering a hardware enabling gating unit to cut off a signal path between an external wire harness control interface and a driving circuit in the electronic parking brake executing mechanism based on the interrupt signal.
3. The method of claim 1, wherein triggering the switching of the redundant power supply built-in the actuator from the charging mode to the discharging mode based on the interrupt signal continues the steps of powering the drive circuit and driving the motor, comprising: and outputting a high-level signal to an enabling end of the redundant power supply based on the interrupt signal, triggering the redundant power supply to switch into a discharging mode, and forming a closed driving loop by the output end of the redundant power supply and a motor winding through the driving circuit.
4. The method of claim 1, wherein the step of maintaining the locked state of the motor to the brake mechanism during continued power by the redundant power source comprises: And under the action of the discharging state signal of the redundant power supply, the control hardware enables the gate control unit to disable the control signal input by the external harness control interface and disable the power supply signal input by the external harness charging interface.
5. The method according to claim 1, wherein the method further comprises: When the whole vehicle power supply works normally, control signals are transmitted through the external harness control interface, and the redundant power supply is charged through the external harness charging interface.
6. The method of claim 1, wherein the step of recovering power from the current vehicle and satisfying a preset wake-up condition comprises: Detecting that the whole vehicle power supply supplies power again stably, and receiving a synchronous command of a vehicle body controller; And responding to the synchronous instruction, controlling the redundant power supply to switch back to a charging mode, and re-enabling the external harness control interface.
7. The method of any one of claims 1 to 6, wherein the actuator includes the redundant power source, the drive circuit and the motor integrated therein, and wherein electrical connection points for driving the motor in the actuator are all covered with a non-conductive encapsulation material.
8. An electronic parking brake control apparatus, comprising: The cutting module is used for responding to an interrupt signal of the whole vehicle power supply and cutting off signal connection between an external wire harness control interface and a driving circuit in the electronic parking brake actuating mechanism; The switching module is used for triggering a redundant power supply built-in an executing mechanism to switch from a charging mode to a discharging mode based on the interrupt signal, and continuously supplying power to the driving circuit and driving the motor; And the control module is used for maintaining the locking state of the motor to the braking mechanism during the continuous power supply period of the redundant power supply until the power supply of the current vehicle is restored and the preset wake-up condition is met.
9. An electronic device comprising a memory, a processor and a program stored on the memory and capable of running on the processor, the processor implementing the method of any one of claims 1 to 7 when executing the program.
10. A computer readable storage medium, characterized in that the computer program is stored in the readable storage medium, which computer program, when executed, implements the method of any of claims 1-7.

Description

Electronic parking brake control method and device Technical Field The invention relates to the technical field of automobile safety, in particular to an electronic parking brake control method and device. Background The automobile burglary prevention is always a consumer concerned field, the burglary prevention is concentrated on the fields of engine burglary prevention, vehicle doors, window breaking and the like, the prior art supports in the aspect, the current electric vehicle is more and more popular, under the condition that no engine exists, a P-gear locking mechanism is lost, a parking brake is used for backing up parking, in some cities with poor security overseas, a thief does not steal property in the vehicle on the spot any more, but releases a rear wheel EPB, and crimes are implemented after the vehicle is pushed to leave. The EPB release principle of the existing electric vehicle is the same as that of the fuel vehicle, the motor of the parking brake is connected with the whole vehicle power supply through a wire harness, and parking and release are performed through positive and negative rotation of the motor, so that when the vehicle is stolen, a thief can carry the standby power supply in advance, cut off the wire harness connected with the whole vehicle power supply, reversely connect the positive electrode and the negative electrode of the wire harness of the motor to the standby power supply, then release the EPB of the rear wheel, so that the vehicle is directly pushed away, and the vehicle cannot automatically whistle and alarm in the whole process, and cannot realize the anti-theft function. Disclosure of Invention The invention aims to provide an electronic parking brake control method and device, which are used for solving the technical problems that a traditional electronic parking brake system is easy to be cut off by the outside after the whole vehicle is powered down, a reverse wiring harness is cracked, parking locking cannot be reliably maintained, and anti-theft safety is poor. In a first aspect, the present invention provides an electronic parking brake control method, including: Responding to an interrupt signal of a whole vehicle power supply, and cutting off signal connection between an external wire harness control interface and a driving circuit in an electronic parking brake actuating mechanism; Triggering a redundant power supply built-in an executing mechanism to switch from a charging mode to a discharging mode based on the interrupt signal, and continuously supplying power to the driving circuit and driving a motor; And maintaining the locking state of the motor to the braking mechanism during the continuous power supply of the redundant power supply until the power supply of the current vehicle is restored and a preset wake-up condition is met. In an alternative embodiment, the step of cutting off signal connection between the external harness control interface and the driving circuit in the electronic parking brake actuator in response to an interrupt signal of the power supply of the whole vehicle includes: responding to a parking instruction sent by a user to control the vehicle to enter a complete power-down mode, and generating a complete vehicle power supply interruption signal; And triggering a hardware enabling gating unit to cut off a signal path between an external wire harness control interface and a driving circuit in the electronic parking brake executing mechanism based on the interrupt signal. In an alternative embodiment, the step of triggering the redundant power supply built-in the execution mechanism to switch from the charging mode to the discharging mode based on the interrupt signal to continuously supply power to the driving circuit and drive the motor comprises the following steps: and outputting a high-level signal to an enabling end of the redundant power supply based on the interrupt signal, triggering the redundant power supply to switch into a discharging mode, and forming a closed driving loop by the output end of the redundant power supply and a motor winding through the driving circuit. In an alternative embodiment, the step of maintaining the locked state of the motor to the brake mechanism during the duration of the power supply of the redundant power source includes: And under the action of the discharging state signal of the redundant power supply, the control hardware enables the gate control unit to disable the control signal input by the external harness control interface and disable the power supply signal input by the external harness charging interface. In an alternative embodiment, the method further comprises: When the whole vehicle power supply works normally, control signals are transmitted through the external harness control interface, and the redundant power supply is charged through the external harness charging interface. In an alternative embodiment, the step of recovering the power of the current vehicle and me