Electronic parking brake control method and device

Abstract

The invention provides an electronic parking brake control method and device, and relates to the technical field of automobile safety. And when the power supply of the whole vehicle is interrupted, the system cuts off signal connection between the external wire harness control interface and the driving circuit in the executing mechanism, triggers the built-in redundant power supply to be switched to a discharging mode, independently supplies power to the motor and maintains parking locking until the power supply is recovered to be legal and awakened. The execution mechanism integrates a redundant power supply, an H-bridge driving circuit and a motor into a whole, adopts a high-strength PP material for injection molding packaging, and wraps all sensitive electrical connection points. Through hardware gating isolation, an internal closed driving loop and physical protection design, cracking behaviors such as reverse connection and shearing of external wire harnesses are effectively blocked, parking locking is still reliably kept after the whole vehicle is powered off, the problem that traditional electronic parking is poor in anti-theft performance is solved, and vehicle parking safety and system stability are improved.

Description

Technical Field

[0001] This invention relates to the technical field of automotive safety, and in particular to an electronic parking brake control method and device. Background Technology

[0002] Car theft prevention has always been a concern for consumers. Currently, theft prevention focuses on engine theft prevention, door theft prevention, and window breaking prevention, which are supported by existing technologies. However, with the increasing popularity of electric vehicles, the P gear locking mechanism is missing when there is no engine. Instead, the parking brake serves as a backup for parking. In some cities with poor security overseas, thieves no longer steal valuables from inside the car on the spot. Instead, they release the rear EPB, push the vehicle away, and then commit the crime.

[0003] Currently, the EPB release principle of electric vehicles is the same as that of gasoline vehicles. The motor of the parking brake is connected to the vehicle's power supply through a wiring harness. Parking and release are executed by reversing the motor. Therefore, when stealing a vehicle, thieves will carry a backup power supply in advance, cut the wiring harness connected to the vehicle's power supply, and reverse the positive and negative terminals of the motor wiring harness to the backup power supply. Then the rear wheel EPB will be released, and the vehicle will be pushed away directly. During the whole process, the vehicle will not automatically sound the horn or alarm, and it cannot achieve the anti-theft function. Summary of the Invention

[0004] The purpose of this invention is to provide an electronic parking brake control method and device to alleviate the technical problems of traditional electronic parking brake systems being easily cut off or hacked by reverse wiring harnesses after the vehicle is powered off, making it impossible to reliably maintain parking lock and resulting in poor anti-theft security.

[0005] In a first aspect, the present invention provides an electronic parking brake control method, comprising: In response to the interruption signal of the vehicle's power supply, the signal connection between the external wiring harness control interface and the drive circuit inside the electronic parking brake actuator is cut off; Based on the interrupt signal, the redundant power supply built into the actuator switches from charging mode to discharging mode, continuously supplying power to the drive circuit and driving the motor. During the continuous power supply of the redundant power source, the motor remains locked to the braking mechanism until the power supply to the current vehicle is restored and the preset wake-up conditions are met.

[0006] In an optional implementation, the step of disconnecting the signal connection between the external wiring harness control interface and the drive circuit within the electronic parking brake actuator in response to a power outage signal from the vehicle includes: In response to a parking command issued by the user, the vehicle is controlled to enter a fully powered-down mode, generating a vehicle power interruption signal. Based on the interrupt signal, the hardware enable gating unit is triggered to cut off the signal path between the external wiring harness control interface and the drive circuit in the electronic parking brake actuator.

[0007] In an optional implementation, the step of triggering the redundant power supply built into the actuator to switch from charging mode to discharging mode based on the interrupt signal, continuously supplying power to the drive circuit and driving the motor, includes: Based on the interrupt signal, a high-level signal is output to the enable terminal of the redundant power supply, triggering the redundant power supply to switch to discharge mode, and the output terminal of the redundant power supply is connected to the motor winding through the drive circuit to form a closed drive loop.

[0008] In an optional implementation, the step of maintaining the motor's locked state to the braking mechanism during continuous operation of the redundant power supply includes: Under the action of the discharge status signal of the redundant power supply, the control hardware enable gating unit disables the control signal input from the external wiring harness control interface and disables the power supply signal input from the external wiring harness charging interface.

[0009] In an optional implementation, the method further includes: When the vehicle power supply is working normally, control signals are transmitted through the external wiring harness control interface, and the redundant power supply is charged through the external wiring harness charging interface.

[0010] In an optional implementation, the step of restoring the vehicle's power and meeting preset wake-up conditions includes: The system detects that the vehicle power supply has been restored to a stable state and receives a synchronization command from the body controller. In response to the synchronization command, the redundant power supply is controlled to switch back to charging mode, and the external wiring harness control interface is reactivated.

[0011] In an optional embodiment, the actuator includes an integrated redundant power supply, a drive circuit, and a motor; all electrical connection points in the actuator used to drive the motor are covered with non-conductive encapsulation material.

[0012] In a second aspect, the present invention provides an electronic parking brake control device, comprising: The disconnect module, in response to the power outage signal of the vehicle, disconnects the signal connection between the external wiring harness control interface and the drive circuit inside the electronic parking brake actuator. The switching module, based on the interrupt signal, triggers the redundant power supply built into the actuator to switch from charging mode to discharging mode, continuously supplying power to the drive circuit and driving the motor; The control module maintains the motor's locked state on the braking mechanism during the continuous power supply of the redundant power source until the power supply of the current vehicle is restored and the preset wake-up conditions are met.

[0013] Thirdly, the present invention provides an electronic device including a memory, a processor, and a program stored in the memory and capable of running on the processor, wherein the processor executes the program to implement the method as described in any of the foregoing embodiments.

[0014] Fourthly, the present invention provides a computer-readable storage medium storing a computer program, which, when executed, implements the method described in any of the foregoing embodiments.

[0015] This invention provides an electronic parking brake control method and device. By responding to a vehicle power interruption signal, the signal connection between the external wiring harness control interface and the internal drive circuit of the electronic parking brake actuator is cut off. At the same time, the redundant power supply built into the actuator is triggered to switch from charging mode to discharging mode, continuously supplying power to the drive circuit and motor. During the redundant power supply period, the motor maintains the locking state of the braking mechanism until the vehicle power is restored and the preset wake-up conditions are met. This method can block the intrusion of external signals from an electrical perspective when the vehicle power fails, and independently maintain the parking lock by relying on the built-in power supply, thereby realizing anti-theft protection after the vehicle is powered off.

[0016] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A flowchart of an electronic parking brake control method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the application structure of an electronic parking brake control method provided in an embodiment of the present invention. Figure 3 This is a functional module diagram of an electronic parking brake control device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the hardware architecture of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The widespread adoption of electric vehicles has driven the automotive industry toward electrification. Its core component, the Electronic Parking Brake (EPB) system, uses an electric motor to drive the brake calipers instead of the traditional mechanical structure, and achieves precise control of the brake calipers through control unit commands.

[0022] Research revealed that existing EPB systems employ standardized wiring harness connections, with the motor directly connected to the vehicle's power network and its power supply logic uniformly regulated by the power management system. This design ensures precise and controllable parking force under normal operating conditions and complies with automotive-grade electrical safety standards. Anti-theft systems developed in the era of gasoline-powered vehicles primarily relied on mechanical locking and engine electronic anti-theft linkage, but electric vehicles have rendered traditional anti-theft mechanisms ineffective due to changes in their powertrain systems. Although modern electric vehicles are equipped with electronic anti-theft measures such as digital keys and remote monitoring, the EPB, as the actuator, still retains an open wiring harness architecture. The standardized power interface and exposed wiring harness layout allow attackers to directly control the EPB motor's operating status by physically cutting the wiring harness and connecting it to an external power source. Because this intrusion method does not involve vehicle CAN bus communication or triggering electronic anti-theft sensors, existing anti-theft systems cannot identify this type of non-protocol-level intrusion.

[0023] Based on this, the electronic parking brake control method, device and system provided in this embodiment of the invention, through electrical isolation, independent internal power supply and physical encapsulation protection, blocks the external cracking path from the root, realizes the autonomous maintenance of the parking lock state after the vehicle is powered off, and greatly improves the anti-theft security and working reliability of the electronic parking system.

[0024] To facilitate understanding of this embodiment, a detailed description of an electronic parking brake control method disclosed in this invention will be provided first. This method can be applied to an electronic parking brake (EPB) controller; such as Figure 2The diagram illustrates the architecture of an electronic parking brake (EPB) system with redundant power supply. Through a four-wire harness and an integrated actuator with built-in redundant power supply, it provides anti-theft parking protection after the vehicle is powered off, as detailed below: The vehicle power supply serves as the vehicle's main power source, powering the EPB controller and charging the redundant power supply within the actuators under normal operating conditions. The EPB switch is the physical interface for the driver to input parking / release commands, sending signals to the EPB controller. The EPB controller is the core control unit of the system, receiving parking commands and the vehicle's power status, processing them, and then issuing control commands to the EPB actuators via the EPB wiring harness. The EPB actuator integrates the EPB redundant power supply, the H-bridge drive circuit, and the EPB motor, and is the core component for parking lock / release. Clamping / releasing the parking brake is the final action completed by the EPB motor-driven braking mechanism, realizing vehicle parking or release.

[0025] The EPB wiring harness adopts a four-wire design. PIN1 / PIN2 are charging interfaces, continuously charging the EPB redundant power supply when the vehicle's power supply is normal. PIN3 / PIN4 are control signal lines, transmitting motor control commands from the EPB controller. PIN1 / PIN2 are connected to the positive and negative terminals of the redundant power supply, which is connected to the EPB motor via an H-bridge drive circuit. PIN3 / PIN4 are directly connected to the motor control terminal, enabling independent signal control.

[0026] Under normal driving / parking conditions, the vehicle power supply powers the EPB controller and simultaneously charges the redundant power supply through PIN1 / PIN2. When the driver operates the EPB switch, the command is sent to the EPB controller via PIN3 / PIN4 to precisely control the motor to complete the clamping / releasing action.

[0027] When the vehicle is powered off and the anti-theft system is activated, the PIN3 / PIN4 control signals are de-energized after the vehicle's power supply is interrupted. The redundant power supply switches to discharge mode and maintains the motor's locked state through the internal H-bridge drive circuit. The system cannot be deceived by cutting / reversing the PIN1 / PIN2 wiring harness, thus enabling vehicle anti-theft monitoring.

[0028] The EPB redundant power supply, H-bridge circuit, and EPB motor are injection molded and encapsulated inside the actuator. Sensitive electrical interfaces (interfaces that affect the motor drive state) are completely hidden, physically eliminating the possibility of external circuit tampering, while also improving the mechanical strength and environmental durability of the components.

[0029] Figure 1 A flowchart of an electronic parking brake control method provided in an embodiment of the present invention.

[0030] Reference Figure 1 This method can be implemented through the following steps: Step S102: In response to the interruption signal of the vehicle power supply, disconnect the signal connection between the external wiring harness control interface and the drive circuit inside the electronic parking brake actuator; It should be noted that the actuator used in the embodiments of the present invention includes an integrated redundant power supply, drive circuit and motor; the electrical connection points in the actuator used to drive the motor are all covered by non-conductive encapsulation material.

[0031] The integrated design enhances the mechanical strength and environmental durability of components, reduces external wiring connections, and lowers the risk of failure. High-strength polypropylene (PP) material is used to encapsulate the actuator entirely through injection molding, covering all electrical connection points of the drive motors. This physically hides and protects sensitive circuits, preventing external personnel from directly accessing or tampering with internal electrical connections, further strengthening anti-theft security.

[0032] The electronic parking brake actuator used in this embodiment of the invention adopts an integrated design, which arranges the EPB redundant power supply, H-bridge drive circuit and EPB motor together inside the actuator. At the same time, high-strength polypropylene (PP) material is used to encapsulate the actuator as a whole through injection molding process, so that all electrical connection points in the actuator used to drive the motor are completely covered by non-conductive encapsulation material, which hides and protects sensitive circuits from a physical level, improves the mechanical strength and environmental weather resistance of the components, and prevents external personnel from directly contacting or tampering with the internal electrical connections.

[0033] Based on this, step S102 can use hardware / software control logic to disconnect the signal path between the external wiring harness control interface and the internal drive circuit of the actuator when the vehicle power is interrupted, thus blocking the intrusion path of external electrical signals. This method cuts off the input channel of external tampering signals from an electrical perspective, preventing external interference with the parking status by sending deceptive commands through the wiring harness.

[0034] In some embodiments, step S102 includes the following steps: Step 1.1: In response to the parking command issued by the user, control the vehicle to enter the fully powered-down mode and generate a vehicle power interruption signal; Here, after the driver issues a parking command by operating the EPB switch, the vehicle controller controls the vehicle to enter a fully powered-down mode, simultaneously generating a trigger signal for a power outage. In this embodiment of the invention, the power outage trigger scenario can be the user actively parking and powering down the vehicle, avoiding accidental triggering of the power-off monitoring logic.

[0035] Step 1.2: Based on the interrupt signal, trigger the hardware enable gating unit to cut off the signal path between the external wiring harness control interface and the drive circuit in the electronic parking brake actuator.

[0036] After the hardware-enabled gating unit receives an interrupt signal, it physically disconnects the connection between the external wiring harness control interface and the internal drive circuit of the actuator to achieve signal isolation. Hardware-level isolation achieves the highest reliability and avoids the risk of signal path leakage caused by software logic failure.

[0037] In addition, when the driver issues a parking command by operating the EPB switch, step 1.1 is executed first. The vehicle controller responds to the command and controls the vehicle to enter a fully powered-down mode, and simultaneously generates a vehicle power interruption signal. Then, step 1.2 is executed. Based on the interruption signal, the hardware enable gating unit is triggered to completely cut off the signal path between the PIN3 / PIN4 control interface in the external EPB harness and the H-bridge drive circuit inside the actuator, ensuring that no control signals can be transmitted from the outside to the actuator through the harness.

[0038] In some embodiments, when the vehicle power supply is operating normally, the control interface and charging interface of the external wiring harness perform the following operations respectively: Step 2.1: When the vehicle power supply is working normally, transmit control signals through the external wiring harness control interface; When the vehicle power supply is normal, the driver's parking / release control commands are transmitted to the EPB controller through the PIN3 / PIN4 control interface in the external four-wire EPB harness to ensure the normal control function of the EPB system under normal driving scenarios and meet the driver's temporary braking and parking needs.

[0039] Step 2.2: When the vehicle power supply is working normally, charge the redundant power supply through the external wiring harness charging interface.

[0040] When the vehicle's power supply is normal, the built-in redundant power supply can be continuously charged through the PIN1 / PIN2 charging interface in the external EPB harness to maintain a stable voltage reserve and keep the redundant power supply in a fully charged standby state, thus providing sufficient power for anti-theft monitoring after a power outage.

[0041] During normal operation of the vehicle power supply, step 2.1 is executed first, transmitting the parking or release control command generated by the driver operating the EPB switch to the EPB controller through the PIN3 / PIN4 control interface in the external four-wire EPB harness. The controller then issues action commands to the actuator. Step 2.2 is executed second, continuously charging the EPB redundant power supply built into the actuator through the PIN1 / PIN2 charging interface in the external EPB harness to ensure that the redundant power supply always maintains a stable voltage reserve state.

[0042] Step S104: Based on the interrupt signal, the redundant power supply built into the actuator switches from charging mode to discharging mode to continuously supply power to the drive circuit and drive the motor. The redundant power supply is built into the actuator. Upon receiving a power interruption signal, it switches from charging standby mode to discharging output mode, continuously supplying power to the EPB motor through the internal drive circuit. In the event of a vehicle power failure, the built-in redundant power supply independently powers the motor drive circuit, ensuring that the parking system can still maintain its operational status.

[0043] In some embodiments, step S104 may also be implemented in the following ways: Step 3.1: Output a high-level signal to the enable terminal of the redundant power supply based on the interrupt signal to trigger the redundant power supply to switch to discharge mode; Here, a high-level trigger signal is output to the enable pin of the redundant power supply to control the redundant power supply to switch from charging state to discharging output state. The redundant power supply mode can be reliably switched through the level signal, ensuring that it can quickly enter the standby power supply state after power failure.

[0044] Step 3.2: Connect the output of the redundant power supply to the motor windings via the drive circuit to form a closed drive circuit.

[0045] In practical applications, the redundant power supply output can be connected to the EPB motor winding through the H-bridge drive circuit inside the actuator to form a closed loop consisting only of the redundant power supply, drive circuit, and motor. This makes the motor drive completely independent of the external wiring harness, avoids external power supply tampering or interference, and ensures the stability of the parking lock.

[0046] Understandably, upon detecting a power outage signal in the vehicle, step 3.1 is executed first, outputting a high-level trigger signal to the enable terminal of the built-in EPB redundant power supply to switch the redundant power supply from charging mode to discharging mode; then step 3.2 is executed, connecting the output terminal of the redundant power supply to the EPB motor winding through the H-bridge drive circuit inside the actuator, forming a closed drive loop consisting only of the redundant power supply, the H-bridge circuit, and the motor, ensuring that the motor's drive power supply is completely independent of the external EPB wiring harness.

[0047] Step S106: During the continuous power supply of the redundant power supply, maintain the motor's locked state on the braking mechanism until the power supply of the current vehicle is restored and the preset wake-up conditions are met.

[0048] During the redundant power supply phase, the control motor remains in a brake clamped state, and the lock control is only released when the vehicle power is restored and the wake-up conditions are met (such as a synchronization command from the body controller). This implements an anti-theft monitoring function after the vehicle is powered off, preventing the vehicle from being moved illegally, while ensuring that the parking release can be restored normally after legitimate power is restored.

[0049] In some embodiments, step S106 may maintain the locked state through the following steps: Step 4.1: Under the action of the discharge status signal of the redundant power supply, the control hardware enable gating unit disables the control signals input from the external wiring harness control interface; Here, the redundant power supply discharge status signal triggers the hardware enable gating unit, disabling all input control signals of the external wiring harness control interface to completely block deceptive commands sent from the outside through the control interface, ensuring that the motor lock-up state is not affected by external interference.

[0050] Step 4.2: Under the action of the discharge status signal of the redundant power supply, the control hardware enable gate unit disables the power supply signal input from the external wiring harness charging interface.

[0051] The power input of the external wiring harness charging interface is simultaneously disabled to prevent external tampering with the power supply by cutting or reversing the charging interface; the embodiment of the present invention dually disables the control and power supply functions of the external interface, preventing external interference with the parking lock status from the root.

[0052] It should be noted that when the EPB redundant power supply enters the discharge state, step 4.1 is executed first, based on the discharge state signal, to control the hardware enable gating unit and disable all control signals input to the PIN3 / PIN4 control interface in the external EPB harness; then step 4.2 is executed, simultaneously disabling the power supply signals input to the PIN1 / PIN2 charging interface in the external EPB harness, so that any external cutting, reversing of the harness or tampering with the power supply cannot act on the internal circuit of the actuator, ensuring that the locking state of the EPB motor is not disturbed.

[0053] In practical applications, if the hardware enable gating unit is faulty or damaged, external cutting, reversing of the wiring harness, or alteration of the power supply may affect the interface used to drive the motor in the internal circuit of the actuator. As an optional embodiment, a verification module can be added between the PIN3 / PIN4 control interface and the EPB motor. When the control signal transmitted by the PIN3 / PIN4 control interface is received, the module verifies whether the current value given to the motor by the H-bridge drive circuit meets the preset current threshold. If it does, the control signal is correct, and the corresponding state change operation is performed based on this control signal. If it does not, the control signal is incorrect, and the current locking state of the motor to the braking mechanism is maintained.

[0054] In some embodiments, the steps of restoring the vehicle's power supply and waking up the controller are implemented through the following steps: Step 5.1: The vehicle power supply is detected to be restored and stabilized, and the synchronization command from the body controller is received; Here, after the system detects that the vehicle power supply has returned to a stable output, it receives a synchronous wake-up command from the body controller to confirm that the vehicle has entered a legal power-on state, thus avoiding premature wake-up caused by false detection of power fluctuations and ensuring the legality and reliability of the wake-up logic.

[0055] Step 5.2: In response to the synchronization command, control the redundant power supply to switch back to charging mode and re-enable the external wiring harness control interface.

[0056] Upon detecting that the vehicle's power supply has been stabilized again, the system receives a synchronization command from the body controller. Based on this command, it controls the redundant power supply to switch from discharge mode back to charging mode. Simultaneously, it re-enables the external wiring harness control interface, automatically restores the normal control logic of the EPB system, and enables the vehicle to perform parking release and subsequent driving operations normally, while also recharging the redundant power supply.

[0057] For example, when the vehicle power supply is detected to be restored to a stable state, step 5.1 is executed first to receive the synchronous wake-up command issued by the body controller and confirm that the vehicle has entered a legal power-on state; then step 5.2 is executed to control the EPB redundant power supply to switch from the discharge mode back to the charging mode based on the synchronous command, and at the same time re-enable the PIN3 / PIN4 control interface in the external EPB wiring harness to restore the normal control logic of the EPB system, so that the vehicle can perform parking release and subsequent driving operations normally.

[0058] In application of this invention, when the vehicle detects a power outage signal, step 1.1 is executed first, by using a hardware-enabled gating unit to disconnect the signal connection between the PIN3 / PIN4 control interface in the external four-wire EPB harness and the internal H-bridge drive circuit of the actuator, thus blocking the intrusion path of external control signals; step 1.2 is executed second, triggering the built-in EPB redundant power supply to switch from charging mode to discharging mode, continuously supplying power to the EPB motor through the internal H-bridge circuit; and step 1.3 is executed last, maintaining the clamping and locking state of the EPB motor on the braking mechanism during the discharge of the redundant power supply until the vehicle power supply is detected to be stably restored and a synchronous wake-up command is received from the body controller, at which point the locking control logic is released.

[0059] In a preferred embodiment of practical application, the electronic parking brake control method and actuator relate to automotive parking safety technology. When the vehicle power is interrupted, the system disconnects the signal connection between the external wiring harness control interface and the drive circuit inside the actuator, triggering the built-in redundant power supply to switch to discharge mode, independently powering the motor and maintaining the parking lock until the power is restored and the system is legally awakened. The actuator integrates the redundant power supply, H-bridge drive circuit, and motor into one unit, using high-strength PP material injection molding encapsulation to cover all sensitive electrical connection points. This invention effectively blocks external wiring harness reverse connection, cutting, and other tampering attempts through hardware gating isolation, internal closed drive circuit, and physical protection design. It reliably maintains the parking lock even after the vehicle power is off, solving the problem of poor anti-theft performance of traditional electronic parking brakes and improving vehicle parking safety and system stability.

[0060] In some embodiments, such as Figure 3As shown, an embodiment of the present invention provides an electronic parking brake control device, comprising: The disconnect module, in response to the power outage signal of the vehicle, disconnects the signal connection between the external wiring harness control interface and the drive circuit inside the electronic parking brake actuator. The switching module, based on the interrupt signal, triggers the redundant power supply built into the actuator to switch from charging mode to discharging mode, continuously supplying power to the drive circuit and driving the motor; The control module maintains the motor's locked state on the braking mechanism during the continuous power supply of the redundant power source until the power supply of the current vehicle is restored and the preset wake-up conditions are met.

[0061] The present invention provides an embodiment of an electronic device. In this embodiment, the electronic device may be, but is not limited to, a personal computer (PC), a laptop computer, a monitoring device, a server, or other computer device with analysis and processing capabilities.

[0062] As an exemplary embodiment, see [link to example]. Figure 4 The electronic device 110 includes a communication interface 111, a processor 112, a memory 113, and a bus 114. The processor 112, the communication interface 111, and the memory 113 are connected via the bus 114. The memory 113 is used to store a computer program that supports the processor 112 in executing the above-described method. The processor 112 is configured to execute the program stored in the memory 113.

[0063] The machine-readable storage medium mentioned in this article can be any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, etc. For example, machine-readable storage media can be: RAM (Random Access Memory), volatile memory, non-volatile memory, flash memory, storage drives (such as hard disk drives), any type of storage disk (such as optical discs, DVDs, etc.), or similar storage media, or combinations thereof.

[0064] Non-volatile media can be non-volatile memory, flash memory, storage drives (such as hard disk drives), any type of storage disk (such as optical discs, DVDs, etc.), or similar non-volatile storage media, or combinations thereof.

[0065] It is understood that the specific operation methods of each functional module in this embodiment can be referred to the detailed description of the corresponding steps in the above method embodiment, and will not be repeated here.

[0066] The computer-readable storage medium provided in the embodiments of the present invention stores a computer program. When the computer program code is executed, it can implement the method described in any of the above embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

[0067] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0068] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0069] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. An electronic parking brake control method, characterized in that, include: In response to the interruption signal of the vehicle's power supply, the signal connection between the external wiring harness control interface and the drive circuit inside the electronic parking brake actuator is cut off; Based on the interrupt signal, the redundant power supply built into the actuator switches from charging mode to discharging mode, continuously supplying power to the drive circuit and driving the motor. During the continuous power supply of the redundant power source, the motor remains locked to the braking mechanism until the power supply to the current vehicle is restored and the preset wake-up conditions are met.

2. The method according to claim 1, characterized in that, The step of disconnecting the signal connection between the external wiring harness control interface and the drive circuit within the electronic parking brake actuator in response to a power outage signal from the vehicle includes: In response to a parking command issued by the user, the vehicle is controlled to enter a fully powered-down mode, generating a vehicle power interruption signal. Based on the interrupt signal, the hardware enable gating unit is triggered to cut off the signal path between the external wiring harness control interface and the drive circuit in the electronic parking brake actuator.

3. The method according to claim 1, characterized in that, The step of triggering the redundant power supply built into the actuator to switch from charging mode to discharging mode based on the interrupt signal, continuously supplying power to the drive circuit and driving the motor, includes: Based on the interrupt signal, a high-level signal is output to the enable terminal of the redundant power supply, triggering the redundant power supply to switch to discharge mode, and the output terminal of the redundant power supply is connected to the motor winding through the drive circuit to form a closed drive loop.

4. The method according to claim 1, characterized in that, The step of maintaining the motor's locked state to the braking mechanism during continuous operation of the redundant power supply includes: Under the action of the discharge status signal of the redundant power supply, the control hardware enable gating unit disables the control signal input from the external wiring harness control interface and disables the power supply signal input from the external wiring harness charging interface.

5. The method according to claim 1, characterized in that, The method further includes: When the vehicle power supply is working normally, control signals are transmitted through the external wiring harness control interface, and the redundant power supply is charged through the external wiring harness charging interface.

6. The method according to claim 1, characterized in that, The steps for restoring power to the current vehicle and meeting preset wake-up conditions include: The system detects that the vehicle power supply has been restored to a stable state and receives a synchronization command from the body controller. In response to the synchronization command, the redundant power supply is controlled to switch back to charging mode, and the external wiring harness control interface is reactivated.

7. The method according to any one of claims 1 to 6, characterized in that, The actuator includes the redundant power supply, the drive circuit, and the motor integrated into one unit; the electrical connection points in the actuator used to drive the motor are all covered by non-conductive encapsulation material.

8. An electronic parking brake control device, characterized in that, include: The disconnect module, in response to the interruption signal of the vehicle's power supply, disconnects the signal connection between the external wiring harness control interface and the drive circuit inside the electronic parking brake actuator. The switching module, based on the interrupt signal, triggers the redundant power supply built into the actuator to switch from charging mode to discharging mode, continuously supplying power to the drive circuit and driving the motor; The control module maintains the motor's locked state on the braking mechanism during the continuous power supply of the redundant power source until the power supply of the current vehicle is restored and the preset wake-up conditions are met.

9. An electronic device, characterized in that, It includes a memory, a processor, and a program stored in the memory and capable of running on the processor, wherein the processor executes the program to implement the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The readable storage medium stores a computer program that, when executed, implements the method described in any one of claims 1-7.

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