Method, device and equipment for smoothly opening electric sliding door after collision and storage medium

Abstract

The application discloses a kind of electric sliding door collision method, device, equipment and storage medium after smooth opening, the method is by responding to vehicle collision signal, control electric sliding door enters the post-collision inhibition state of keeping power supply;In post-collision inhibition state, shield door opening instruction and start hardware timer to time;When the accumulated timing time of hardware timer reaches preset length threshold, remove post-collision inhibition state and restore electric opening function, can after vehicle collision, by controlling electric sliding door enters the post-collision inhibition state of keeping power supply, effectively prevent the door from inertia impact or accidental opening by misoperation to avoid secondary injury, and utilize hardware timer accurately control safety buffer period, after accumulated timing time reaches preset threshold, automatically restore electric opening function, ensure that occupant can still be smoothly escaped by electric mode in the case where collision signal is not reset, to solve the contradiction between beautiful design and collision escape reliability.

Description

Technical Field

[0001] This invention relates to the field of vehicle body control and safety technology, and in particular to a method, device, equipment and storage medium for the smooth opening of an electric sliding door after a collision. Background Technology

[0002] Electric sliding doors have gradually become standard equipment in new energy multi-purpose vehicles (MPVs). In pursuit of the ultimate in simple and beautiful interior design, the traditional mechanical inner handle is generally eliminated, and an emergency handle that is partially hidden in the map pocket is used to replace the inner handle function.

[0003] However, after the collision, the Power Sliding Door (PSD) controller received the collision signal, and the central locking of the upper door unlocked. For safety reasons, the power sliding doors of the second row switched from automatic mode to manual mode.

[0004] The doors cannot be opened by pressing the open button inside the vehicle because the internal mechanical door handle has been removed. Therefore, the doors can only be opened and unlocked by using the emergency handle. The emergency handle is a two-step process (pull open the cover + pull the cable), which is partially hidden in the map pocket and is not easy to operate, causing user complaints.

[0005] Existing patent CN115263121A discloses a control method, device, vehicle, and readable storage medium for an electric sliding door. The method includes: acquiring the state of the electric sliding door, the vehicle's position state, and the vehicle's status; controlling the movement of the electric sliding door based on these conditions; and controlling the operation of the electric sliding door based on factors such as whether the door is in a hovering state, the vehicle's slope, whether there are people inside the vehicle, and whether the vehicle key is detected. For example, the electric sliding door can be controlled to move to a fully open or fully closed position and lock. This enables reliable anti-collision functionality for the door, preventing problems such as excessive power consumption, vehicle battery depletion, and difficulty starting due to obstacles preventing the door from fully opening or closing on steep slopes, thus saving vehicle energy and improving vehicle safety and reliability.

[0006] The patent only mentions that the reliable anti-collision function of the sliding door is the relationship between the sliding door and the environment on its own track, rather than the safety strategy for occupants to safely enter and exit the sliding door after a vehicle collision. Summary of the Invention

[0007] The main objective of this invention is to provide a method, apparatus, device, and storage medium for the smooth opening of an electric sliding door after a collision. This invention aims to solve the technical problem in the prior art where electric sliding doors, due to immediate power failure or control logic locking after a vehicle collision, prevent occupants from reliably escaping electrically, making it difficult to balance the aesthetic design without mechanical handles with the requirement for safe opening after a collision.

[0008] In a first aspect, the present invention provides a method for smoothly opening an electric sliding door after a collision, the method comprising the following steps: In response to a vehicle collision signal, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply; In the post-collision suppression state, the door opening command is blocked and a hardware timer is started to keep track; When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric start function is restored.

[0009] Optionally, the step of controlling the electric sliding door to enter a post-collision suppression state while maintaining power supply in response to a vehicle collision signal includes: After the current vehicle's electric sliding door controller receives a vehicle collision signal and confirms that a collision event has occurred, it controls the electric sliding door to enter a post-collision suppression state that maintains power supply.

[0010] Optionally, the step of controlling the electric sliding door to enter a post-collision suppression state while maintaining power supply after the current vehicle's electric sliding door controller receives a vehicle collision signal and confirms that a collision event has occurred includes: When the electric sliding door controller of the current vehicle receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller or door pressure sensor, and confirms that a collision event has occurred, it controls the electric sliding door to enter a post-collision suppression state that maintains power supply.

[0011] Optionally, after the current vehicle's electric sliding door controller receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller, or door pressure sensor, and confirms that a collision event has occurred, controlling the electric sliding door to enter a post-collision suppression state with sustained power supply includes: When the electric sliding door controller of the current vehicle receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller or door pressure sensor, the longitudinal acceleration and lateral acceleration are acquired. When the longitudinal acceleration or the lateral acceleration exceeds a preset first-level warning threshold and the duration exceeds a first preset time, a collision event is confirmed to have occurred. or, When the longitudinal acceleration or the lateral acceleration exceeds a preset secondary warning threshold, a collision event is confirmed to have occurred, wherein the preset secondary warning threshold is higher than the preset primary warning threshold; After confirming that a collision event has occurred, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply.

[0012] Optionally, the step of blocking the door opening command and starting a hardware timer in the post-collision suppression state includes: In the post-collision suppression state, the current vehicle's electric sliding door controller actively ignores and blocks all door opening request signals from the micro switches of the door handles inside and outside the vehicle, the remote key, the Bluetooth key, and the soft switch of the central control screen. At the same time, the motor current circuit of the drive mechanism is cut off to physically lock the door position, preventing the door from being accidentally opened due to collision inertia or accidental contact by personnel, thus preventing secondary injuries. The hardware timer inside the electric sliding door controller is activated to start continuous timing. If a secondary collision signal is detected during the timing period, the timing is reset, and the current timing process is independent of the reset state of the collision signal.

[0013] Optionally, starting a continuous countdown by activating a hardware timer within the electric sliding door controller includes: The timing is started by activating a hardware timer inside the electric sliding door controller, wherein the hardware timer is powered by a backup power source, which is a supercapacitor or an independent backup battery; When a vehicle collision causes fluctuations in the main battery voltage or a momentary power outage, the backup power supply maintains the hardware timer to continue timing, ensuring that the timing process is not interrupted.

[0014] Optionally, the step of releasing the post-collision suppression state and restoring the electric start function when the cumulative timing time of the hardware timer reaches a preset duration threshold includes: When the cumulative timing of the hardware timer reaches the preset time threshold, the electric sliding door controller of the current vehicle determines that the safety buffer period after the collision has ended, and then releases the post-collision suppression state. Reactivate the blocked access permissions for door opening request signals from the micro switches of the inner and outer door handles, remote keys, Bluetooth keys and central control screen soft switches, and close the previously cut-off motor current circuit of the drive mechanism. Restore the electric opening function of the electric sliding door.

[0015] Optionally, restoring the electric opening function of the electric sliding door includes: Before the post-collision suppression state is lifted, a system self-test is performed to check the battery voltage and motor circuit status. If the system self-test is normal, restore the electric sliding door to full-function mode; If the power supply voltage is unstable but available, enter restricted mode, allowing only a single inching to open the door; If the system malfunctions, it will remain in a suppressed state and issue an alarm to prompt the user to use the mechanical emergency mechanism.

[0016] Optionally, before releasing the post-collision suppression state and restoring the electric opening function when the cumulative timing time of the hardware timer reaches a preset duration threshold, the method for smoothly opening the electric sliding door after a collision further includes: The duration of the dynamic adaptive time window is calculated in real time based on sensor data. The preset duration threshold is determined based on the duration of the dynamic adaptive time window.

[0017] Optionally, the step of determining the preset duration threshold based on the duration of the dynamic adaptive time window includes: The preset duration threshold is determined based on the base time, acceleration correction term, and rollover correction term of the dynamic adaptive time window. The acceleration correction term is the product of the acceleration weight coefficient and the difference between the maximum acceleration and the acceleration threshold during the collision process. The rollover correction term is the product of the rollover weight coefficient and the vehicle rollover angular velocity.

[0018] Optionally, after the cumulative timing of the hardware timer reaches a preset duration threshold, the method for smoothly opening the electric sliding door after a collision, following the release of the post-collision suppression state and restoration of the electric opening function, further includes: When the current vehicle rollover angle is detected to exceed the preset angle and remain so, the current control logic is upgraded to gravity-assisted unlocking logic, which suppresses electric opening but automatically unlocks the mechanical lock.

[0019] Optionally, after the cumulative timing of the hardware timer reaches a preset duration threshold, the method for smoothly opening the electric sliding door after a collision, following the release of the post-collision suppression state and restoration of the electric opening function, further includes: Upon detecting a water level sensor trigger or a change in water pressure detected by the air pressure sensor, the post-collision suppression state is skipped, and an immediate attempt is made to electrically open or unlock the mechanical mechanism.

[0020] Optionally, after the cumulative timing of the hardware timer reaches a preset duration threshold, the method for smoothly opening the electric sliding door after a collision, following the release of the post-collision suppression state and restoration of the electric opening function, further includes: When a battery pack collision damage is detected, resulting in a decrease in insulation resistance, the high-voltage relay is disconnected first after the suppression period ends, and then the low-voltage door control is restored.

[0021] Optionally, after the cumulative timing of the hardware timer reaches a preset duration threshold, the method for smoothly opening the electric sliding door after a collision, following the release of the post-collision suppression state and restoration of the electric opening function, further includes: When the vehicle side airbag of the current vehicle is detected to have deployed, the preset duration threshold is automatically extended or the electric opening of the current side electric sliding door is prohibited.

[0022] Optionally, after the cumulative timing of the hardware timer reaches a preset duration threshold, the method for smoothly opening the electric sliding door after a collision, following the release of the post-collision suppression state and restoration of the electric opening function, further includes: If the seatbelt is detected not being released during the post-collision suppression state or before the electric opening function is restored, the electric function is delayed or a voice prompt is issued.

[0023] Optionally, after controlling the electric sliding door to enter a post-collision suppression state while maintaining power supply in response to a vehicle collision signal, the method for smoothly opening the electric sliding door after a collision further includes: When the vehicle collision signal is detected, the current suppression status of the door and the estimated recovery time are sent to the cloud.

[0024] Optionally, after controlling the electric sliding door to enter a post-collision suppression state while maintaining power supply in response to a vehicle collision signal, the method for smoothly opening the electric sliding door after a collision further includes: Determine whether the current vehicle is undergoing an OTA upgrade. When the vehicle is currently undergoing an OTA upgrade, if a safety default mode is forcibly executed, the safety default mode is to maintain the post-collision suppression state until the upgrade is completed or manual intervention is required.

[0025] Secondly, to achieve the above objectives, the present invention also proposes a device for smoothly opening an electric sliding door after a collision, the device comprising: The suppression state control module is used to control the electric sliding door to enter a post-collision suppression state that maintains power supply in response to a vehicle collision signal. The timing module is used to block the door opening command and start a hardware timer to keep track of the time in the post-collision suppression state; The recovery module is used to release the post-collision suppression state and restore the electric start function when the cumulative timing time of the hardware timer reaches a preset duration threshold.

[0026] Thirdly, to achieve the above objectives, the present invention also proposes a device for smoothly opening an electric sliding door after a collision. The device includes a memory, a processor, and an electric sliding door smooth opening program stored in the memory and executable on the processor. The electric sliding door smooth opening program is configured to implement the steps of the electric sliding door smooth opening method described above.

[0027] Fourthly, to achieve the above objectives, the present invention also proposes a storage medium storing a program for the smooth opening of an electric sliding door after a collision. When the program for the smooth opening of an electric sliding door after a collision is executed by a processor, the steps of the method for the smooth opening of an electric sliding door after a collision as described above are implemented.

[0028] The present invention proposes a method for the smooth opening of an electric sliding door after a collision. In response to a vehicle collision signal, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply. In this state, the door opening command is blocked, and a hardware timer is started. When the accumulated time of the hardware timer reaches a preset threshold, the post-collision suppression state is released, and the electric opening function is restored. This method effectively prevents the door from accidentally opening due to inertial impact or misoperation after a vehicle collision by controlling the electric sliding door to maintain power supply, thus avoiding secondary injuries. Furthermore, the hardware timer precisely controls the safety buffer period, automatically restoring the electric opening function after the accumulated time reaches a preset threshold. This ensures that occupants can still escape smoothly electrically even if the collision signal has not been reset, thereby resolving the contradiction between aesthetic design and reliable collision escape. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of the present invention; Figure 2 This is a flowchart illustrating the first embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 3 This is a flowchart illustrating the second embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 4 This is a flowchart illustrating the third embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 5 This is a flowchart illustrating the fourth embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 6 This is a flowchart illustrating the fifth embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 7This is a flowchart illustrating the sixth embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 8 This is the signal logic diagram corresponding to the method for smoothly opening an electric sliding door after a collision according to the present invention; Figure 9 This is a functional block diagram of the first embodiment of the electric sliding door opening device after collision according to the present invention.

[0030] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0032] The solution of this invention is mainly as follows: In response to a vehicle collision signal, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply; in the post-collision suppression state, the door opening command is blocked and a hardware timer is started to keep track of the time; when the cumulative time of the hardware timer reaches a preset time threshold, the post-collision suppression state is released and the electric opening function is restored. After a vehicle collision, by controlling the electric sliding door to enter the post-collision suppression state that maintains power supply, the door can be effectively prevented from being accidentally opened due to inertial impact or misoperation to avoid secondary injury. The hardware timer is used to precisely control the safety buffer period, and the electric opening function is automatically restored after the cumulative time reaches the preset threshold, ensuring that occupants can still escape smoothly by electric means even if the collision signal has not been reset. This solves the contradiction between aesthetic design and reliable collision escape, and addresses the technical problem in the prior art where electric sliding doors cannot reliably escape by electric means due to immediate power failure or control logic lock after a vehicle collision, making it difficult to balance the aesthetic design without mechanical handles and the requirement for safe opening after a collision.

[0033] Reference Figure 1 , Figure 1 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of the present invention.

[0034] like Figure 1As shown, the device may include: a processor 1001, such as a CPU; a communication bus 1002; a user interface 1003; a network interface 1004; and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0035] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0036] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating device, a network communication module, a user interface module, and a program for the smooth opening of the electric sliding door after a collision.

[0037] The device of this invention calls the program stored in the memory 1005 after the electric sliding door is hit, through the processor 1001, and performs the following operations: In response to a vehicle collision signal, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply; In the post-collision suppression state, the door opening command is blocked and a hardware timer is started to keep track; When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric start function is restored.

[0038] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: After the current vehicle's electric sliding door controller receives a vehicle collision signal and confirms that a collision event has occurred, it controls the electric sliding door to enter a post-collision suppression state that maintains power supply.

[0039] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: When the electric sliding door controller of the current vehicle receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller or door pressure sensor, and confirms that a collision event has occurred, it controls the electric sliding door to enter a post-collision suppression state that maintains power supply.

[0040] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: When the electric sliding door controller of the current vehicle receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller or door pressure sensor, the longitudinal acceleration and lateral acceleration are acquired. When the longitudinal acceleration or the lateral acceleration exceeds a preset first-level warning threshold and the duration exceeds a first preset time, a collision event is confirmed to have occurred. or, When the longitudinal acceleration or the lateral acceleration exceeds a preset secondary warning threshold, a collision event is confirmed to have occurred, wherein the preset secondary warning threshold is higher than the preset primary warning threshold; After confirming that a collision event has occurred, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply.

[0041] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: In the post-collision suppression state, the current vehicle's electric sliding door controller actively ignores and blocks all door opening request signals from the micro switches of the door handles inside and outside the vehicle, the remote key, the Bluetooth key, and the soft switch of the central control screen. At the same time, the motor current circuit of the drive mechanism is cut off to physically lock the door position, preventing the door from being accidentally opened due to collision inertia or accidental contact by personnel, thus preventing secondary injuries. The hardware timer inside the electric sliding door controller is activated to start continuous timing. If a secondary collision signal is detected during the timing period, the timing is reset, and the current timing process is independent of the reset state of the collision signal.

[0042] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: The timing is started by activating a hardware timer inside the electric sliding door controller, wherein the hardware timer is powered by a backup power source, which is a supercapacitor or an independent backup battery; When a vehicle collision causes fluctuations in the main battery voltage or a momentary power outage, the backup power supply maintains the hardware timer to continue timing, ensuring that the timing process is not interrupted.

[0043] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: When the cumulative timing of the hardware timer reaches the preset time threshold, the electric sliding door controller of the current vehicle determines that the safety buffer period after the collision has ended, and then releases the post-collision suppression state. Reactivate the blocked access permissions for door opening request signals from the micro switches of the inner and outer door handles, remote keys, Bluetooth keys and central control screen soft switches, and close the previously cut-off motor current circuit of the drive mechanism. Restore the electric opening function of the electric sliding door.

[0044] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: Before the post-collision suppression state is lifted, a system self-test is performed to check the battery voltage and motor circuit status. If the system self-test is normal, restore the electric sliding door to full-function mode; If the power supply voltage is unstable but available, enter restricted mode, allowing only a single inching to open the door; If the system malfunctions, it will remain in a suppressed state and issue an alarm to prompt the user to use the mechanical emergency mechanism.

[0045] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: The duration of the dynamic adaptive time window is calculated in real time based on sensor data. The preset duration threshold is determined based on the duration of the dynamic adaptive time window.

[0046] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: The preset duration threshold is determined based on the base time, acceleration correction term, and rollover correction term of the dynamic adaptive time window. The acceleration correction term is the product of the acceleration weight coefficient and the difference between the maximum acceleration and the acceleration threshold during the collision process. The rollover correction term is the product of the rollover weight coefficient and the vehicle rollover angular velocity.

[0047] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: When the current vehicle rollover angle is detected to exceed the preset angle and remain so, the current control logic is upgraded to gravity-assisted unlocking logic, which suppresses electric opening but automatically unlocks the mechanical lock.

[0048] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: Upon detecting a water level sensor trigger or a change in water pressure detected by the air pressure sensor, the post-collision suppression state is skipped, and an immediate attempt is made to electrically open or unlock the mechanical mechanism.

[0049] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: When a battery pack collision damage is detected, resulting in a decrease in insulation resistance, the high-voltage relay is disconnected first after the suppression period ends, and then the low-voltage door control is restored.

[0050] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: When the vehicle side airbag of the current vehicle is detected to have deployed, the preset duration threshold is automatically extended or the electric opening of the current side electric sliding door is prohibited.

[0051] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: If the seatbelt is detected not being released during the post-collision suppression state or before the electric opening function is restored, the electric function is delayed or a voice prompt is issued.

[0052] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: When the vehicle collision signal is detected, the current suppression status of the door and the estimated recovery time are sent to the cloud.

[0053] The device of the present invention, through processor 1001 calling the electric sliding door collision opening program stored in memory 1005, also performs the following operations: Determine whether the current vehicle is undergoing an OTA upgrade. When the vehicle is currently undergoing an OTA upgrade, if a safety default mode is forcibly executed, the safety default mode is to maintain the post-collision suppression state until the upgrade is completed or manual intervention is required.

[0054] This embodiment, through the above-described scheme, responds to a vehicle collision signal by controlling the electric sliding door to enter a post-collision suppression state that maintains power supply. In this state, the door opening command is blocked, and a hardware timer is started. When the accumulated time of the hardware timer reaches a preset threshold, the post-collision suppression state is released, and the electric opening function is restored. This effectively prevents the door from accidentally opening due to inertial impact or misoperation after a vehicle collision, thus avoiding secondary injuries. Furthermore, the hardware timer precisely controls the safety buffer period, automatically restoring the electric opening function after the accumulated time reaches a preset threshold. This ensures that occupants can still escape electrically even if the collision signal has not been reset, thereby resolving the contradiction between aesthetic design and reliable collision escape.

[0055] Based on the above hardware structure, an embodiment of the method for smoothly opening an electric sliding door after a collision is proposed.

[0056] Reference Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention.

[0057] In the first embodiment, the method for smoothly opening the electric sliding door after a collision includes the following steps: Step S10: In response to the vehicle collision signal, control the electric sliding door to enter the post-collision suppression state that maintains power supply.

[0058] It should be noted that this means that after receiving a collision signal, the controller switches the door control system to a suppression mode that prohibits immediate opening, thereby preventing secondary damage while preserving the necessary power conditions for the subsequent restoration of the electric opening function.

[0059] Step S20: In the post-collision suppression state, the door opening command is blocked and a hardware timer is started to keep track of the time.

[0060] It should be understood that the controller blocks the execution of all door opening request signals during this period to avoid secondary damage, while using a hardware timer to independently accumulate the safety buffer time, providing an accurate time reference for the subsequent restoration of the electric opening function.

[0061] Step S30: When the cumulative timing time of the hardware timer reaches the preset duration threshold, the post-collision suppression state is released and the electric start function is restored.

[0062] Understandably, the logic of state release and function restoration based on timing results means that when the accumulated time of the hardware timer reaches the preset threshold, the safety buffer period is determined to be over. The controller then releases the post-collision suppression state and restores the electric start function to ensure that the occupants can escape smoothly by electric means after passing through the high-risk period.

[0063] This embodiment, through the above-described scheme, responds to a vehicle collision signal by controlling the electric sliding door to enter a post-collision suppression state that maintains power supply. In this state, the door opening command is blocked, and a hardware timer is started. When the accumulated time of the hardware timer reaches a preset threshold, the post-collision suppression state is released, and the electric opening function is restored. This effectively prevents the door from accidentally opening due to inertial impact or misoperation after a vehicle collision, thus avoiding secondary injuries. Furthermore, the hardware timer precisely controls the safety buffer period, automatically restoring the electric opening function after the accumulated time reaches a preset threshold. This ensures that occupants can still escape electrically even if the collision signal has not been reset, thereby resolving the contradiction between aesthetic design and reliable collision escape.

[0064] Furthermore, Figure 3 This is a flowchart illustrating the second embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 3 As shown, based on the first embodiment, a second embodiment of the method for smoothly opening an electric sliding door after a collision is proposed. In this embodiment, step S10 specifically includes the following steps: Step S11: After the electric sliding door controller of the current vehicle receives the vehicle collision signal and confirms that a collision event has occurred, it controls the electric sliding door to enter the post-collision suppression state that maintains power supply.

[0065] It should be noted that after the electric sliding door controller identifies and confirms the validity of the collision signal, it controls the electric sliding door to enter a post-collision suppression state that maintains power supply, that is, the door control system switches from the normal operation mode to a specific safety protection mode.

[0066] Furthermore, step S11 specifically includes the following steps: When the electric sliding door controller of the current vehicle receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller or door pressure sensor, and confirms that a collision event has occurred, it controls the electric sliding door to enter a post-collision suppression state that maintains power supply.

[0067] It should be understood that the controller ensures the reliability of collision event recognition by receiving signals from at least one of the acceleration, airbag, or door pressure sensors, and performs a state switch after confirming a collision, controlling the electric sliding door to enter a post-collision suppression state that maintains power supply. This can preserve the necessary power execution conditions for the subsequent restoration of the electric opening function, rather than using the traditional method of permanently cutting off power after a collision.

[0068] Furthermore, the step of controlling the electric sliding door to enter a post-collision suppression state while maintaining power supply after the current vehicle's electric sliding door controller receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller, or door pressure sensor, and confirms that a collision event has occurred, specifically includes the following steps: When the electric sliding door controller of the current vehicle receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller or door pressure sensor, the longitudinal acceleration and lateral acceleration are acquired. When the longitudinal acceleration or the lateral acceleration exceeds a preset first-level warning threshold and the duration exceeds a first preset time, a collision event is confirmed to have occurred. or, When the longitudinal acceleration or the lateral acceleration exceeds a preset secondary warning threshold, a collision event is confirmed to have occurred, wherein the preset secondary warning threshold is higher than the preset primary warning threshold; After confirming that a collision event has occurred, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply.

[0069] Understandably, after receiving a signal from at least one of the acceleration sensor, airbag controller, or door pressure sensor, the controller collects longitudinal and lateral acceleration data and employs a dual-threshold strategy to balance detection sensitivity and anti-interference capability: the first-level warning threshold is combined with duration determination to filter instantaneous interference, and the second-level warning threshold achieves instantaneous confirmation through a higher threshold. If either of the two conditions is met, it is confirmed as a collision event, thereby triggering the control of the electric sliding door to enter a post-collision suppression state that maintains power supply, ensuring accurate collision identification while preserving the power base for subsequent electric recovery.

[0070] This embodiment, through the above-described scheme, receives a vehicle collision signal from the current vehicle's electric sliding door controller and, after confirming the collision event, controls the electric sliding door to enter a post-collision suppression state that maintains power supply. This prevents secondary damage caused by the door being accidentally opened due to inertial impact or misoperation, and also preserves the necessary power foundation for restoring the electric opening function without needing to re-energize it later.

[0071] Furthermore, Figure 4This is a flowchart illustrating the third embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 4 As shown, based on the first embodiment, a third embodiment of the method for smoothly opening an electric sliding door after a collision is proposed. In this embodiment, step S20 specifically includes the following steps: Step S21: In the post-collision suppression state, the electric sliding door controller of the current vehicle actively ignores and blocks all door opening request signals from the micro switches of the door handles inside and outside the vehicle, the remote key, the Bluetooth key, and the soft switch of the central control screen.

[0072] It should be noted that the controller's specific blocking logic and signal range for door opening commands are as follows during the post-collision suppression state: during this period, the controller will temporarily disable the response function of all conventional door opening channels. Request signals from physical microswitches, wireless and soft switches will be actively intercepted and not executed to ensure that the doors remain locked during the safety buffer period and to prevent accidental opening of the doors due to accidental touch or collision inertia.

[0073] Step S22: Simultaneously cut off the motor current circuit of the drive mechanism to physically lock the door position, preventing secondary injuries caused by accidental opening of the door due to collision inertia or accidental contact by personnel.

[0074] Understandably, by cutting off the motor current circuit of the drive mechanism, the actuator loses power output and enters a locked state, thereby forcibly fixing the door in its current position and preventing secondary injuries caused by passengers being thrown out of the vehicle or being hit by external objects due to accidental opening of the door.

[0075] Step S23: Start the continuous timing by activating the hardware timer inside the electric sliding door controller.

[0076] It should be understood that the controller uses an internal independent hardware timing module rather than software delay to perform timing tasks, ensuring that the stability and reliability of the continuous timing process are not affected by the main program's running state. This is used to accurately accumulate the safety buffer time after a collision, providing an accurate time reference for subsequent judgment on whether to release the suppression state and restore the electric opening function.

[0077] Furthermore, step S23 specifically includes the following steps: The timing is started by activating a hardware timer inside the electric sliding door controller, wherein the hardware timer is powered by a backup power source, which is a supercapacitor or an independent backup battery; When a vehicle collision causes fluctuations in the main battery voltage or a momentary power outage, the backup power supply maintains the hardware timer to continue timing, ensuring that the timing process is not interrupted.

[0078] It should be noted that the timer is powered by a supercapacitor or an independent backup battery, rather than relying solely on the main battery. This is intended to maintain the hardware timer's operation through the backup power supply when a vehicle collision causes fluctuations in the main power supply voltage or a momentary power outage, ensuring that the timing process is not interrupted. This avoids the failure of the safety buffer period timing due to power failure and ensures the accurate execution of the subsequent electric start function recovery logic.

[0079] Step S24: If a secondary collision signal is detected during the timing period, the timing is reset, and the current timing process is independent of the reset state of the collision signal.

[0080] Understandably, if a secondary collision occurs during the safety buffer period, the timer will restart to ensure the vehicle stabilizes again. The timing process is independent of whether the collision signal has been eliminated. Even if the collision signal persists and is not reset, the timer will continue to run until it reaches the threshold, thereby avoiding the risk of being unable to escape due to a continuously locked signal and ensuring the reliability of escape under complex collision conditions.

[0081] This embodiment, through the above-described scheme, ensures that in the post-collision suppression state, the vehicle's electric sliding door controller actively ignores and blocks all door opening request signals from the microswitches of the door handles inside and outside the vehicle, the remote key, the Bluetooth key, and the soft switch of the central control screen. Simultaneously, it cuts off the motor current circuit of the drive mechanism to physically lock the door position, preventing secondary injuries caused by accidental door opening due to collision inertia or accidental human contact. A hardware timer is started within the electric sliding door controller to continuously count down. If a secondary collision signal is detected during the counting process, the timer is reset, and the current counting process is independent of the collision signal reset state. This allows for effective prevention of accidental door opening due to collision inertia or misoperation during the post-collision safety buffer period by blocking all door opening request signals and cutting off the motor current circuit, thus avoiding secondary injuries. Furthermore, the hardware timer continuously counts independently of the collision signal reset state and resets when a secondary collision is detected, ensuring reliable door locking and timely restoration of the electric opening function even in complex collision conditions. This prevents permanent door locking due to the continued presence of the collision signal, thereby guaranteeing the safety and reliability of occupant escape.

[0082] Furthermore, Figure 5 This is a flowchart illustrating the fourth embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 5 As shown, based on the first embodiment, a fourth embodiment of the method for smoothly opening an electric sliding door after a collision is proposed. In this embodiment, step S30 specifically includes the following steps: Step S31: When the cumulative timing time of the hardware timer reaches the preset time threshold, the electric sliding door controller of the current vehicle determines that the safety buffer period after the collision has ended, and then releases the post-collision suppression state.

[0083] It should be noted that the controller uses whether the cumulative timing of the hardware timer reaches the preset time threshold as the basis for determining whether the safety buffer period after a collision has ended. Once this time condition is met, it is determined that the vehicle has passed the high-risk period, and then the operation of releasing the suppression state is executed, thereby switching the door control system from the safety protection mode back to the operable mode, providing the prerequisite for the subsequent restoration of the electric opening function.

[0084] Step S32: Reactivate the blocked access permissions for receiving door opening request signals from the micro switches of the inner and outer door handles, remote key, Bluetooth key and central control screen soft switch, and close the previously cut-off motor current circuit of the drive mechanism.

[0085] Understandably, the controller re-enables the reception of all door opening request signals, including the microswitches of the internal and external handles, remote control and Bluetooth key, and the soft switch of the central control screen, and closes the previously cut-off motor current circuit of the drive mechanism to restore power output. This allows the door control system to switch from the safety protection mode back to the normal operating mode, ensuring that occupants can smoothly open the door electrically to escape after the safety buffer period ends.

[0086] Step S33: Restore the electric opening function of the electric sliding door.

[0087] It should be understood that the controller switches the door control system from the inoperable state back to the normal response state, re-establishes the control link between the door opening command and the drive motor, and restores the drive mechanism's power output capability, thereby allowing occupants to operate the door electrically after a collision to achieve reliable escape.

[0088] Furthermore, step S33 specifically includes the following steps: Before the post-collision suppression state is lifted, a system self-test is performed to check the battery voltage and motor circuit status. If the system self-test is normal, restore the electric sliding door to full-function mode; If the power supply voltage is unstable but available, enter restricted mode, allowing only a single inching to open the door; If the system malfunctions, it will remain in a suppressed state and issue an alarm to prompt the user to use the mechanical emergency mechanism.

[0089] Understandably, before performing the recovery operation, the controller first assesses the battery voltage and motor circuit status, and takes differentiated recovery measures based on the self-test results: if the system is normal, it restores the full-function mode; if the power supply voltage is unstable, it enters the restricted mode that only allows single-moment door opening; if the system malfunctions, it remains in a suppressed state and alarms to prompt the user to use the mechanical emergency mechanism, thereby ensuring that the door operation is restored under the premise that the system status is controllable, avoiding safety risks caused by equipment damage or power abnormalities, and improving the reliability of the escape process after a collision.

[0090] This embodiment, through the above-described scheme, determines the end of the post-collision safety buffer period by the current vehicle's electric sliding door controller when the accumulated time of the hardware timer reaches a pre-defined preset duration threshold. It then releases the post-collision suppression state, reactivates the previously blocked access permissions for door opening request signals from the inner and outer door handle microswitches, remote key, Bluetooth key, and central control screen soft switch, and closes the previously disconnected drive mechanism motor current circuit. This restores the electric opening function of the electric sliding door. By automatically determining the end of the post-collision safety buffer period and releasing the suppression state after the hardware timer's accumulated time reaches the preset duration threshold, and by reactivating the blocked access permissions for various door opening request signals and closing the drive mechanism motor current circuit, the electric opening function of the electric sliding door is restored. This ensures that occupants can escape smoothly electrically without waiting for the collision signal to reset, effectively preventing secondary injuries at the moment of collision while guaranteeing the reliability and convenience of subsequent escape.

[0091] Furthermore, Figure 6 This is a flowchart illustrating the fifth embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 6 As shown, based on the first embodiment, the fifth embodiment of the method for smoothly opening an electric sliding door after a collision is proposed. In this embodiment, before step S30, the smooth opening of the electric sliding door after a collision further includes the following steps: Step S301: Calculate the duration of the dynamic adaptive time window in real time based on the sensor data.

[0092] It should be noted that the controller no longer uses a fixed time value, but instead calculates the duration of a dynamic adaptive time window based on real-time sensor data using a specific algorithm. This allows the controller to adjust the safety buffer period according to the severity of the collision and the vehicle's attitude, ensuring that the suppression time is sufficient to avoid secondary injuries without excessively delaying escape, thus achieving optimal safety protection under different collision conditions.

[0093] Step S302: Determine the preset duration threshold according to the duration of the dynamic adaptive time window.

[0094] Understandably, the duration of the dynamic adaptive time window, which was previously calculated in real time based on sensor data, is directly used as the preset duration threshold. This means that the duration of the suppression state no longer depends on a fixed calibrated time value, but can change in real time with the severity of the collision and the vehicle's attitude, ensuring that the optimal safety buffer duration can be provided under different collision conditions.

[0095] Furthermore, step S302 specifically includes the following steps: The preset duration threshold is determined based on the base time, acceleration correction term, and rollover correction term of the dynamic adaptive time window. The acceleration correction term is the product of the acceleration weight coefficient and the difference between the maximum acceleration and the acceleration threshold during the collision process. The rollover correction term is the product of the rollover weight coefficient and the vehicle rollover angular velocity.

[0096] In a practical implementation, the preset duration threshold can be calculated using the following formula based on the duration of the dynamic adaptive time window:

[0097] in, To suppress duration, Based on time, For acceleration weighting coefficients, This represents the maximum acceleration during the collision. For acceleration threshold, For the rollover weighting coefficient, This refers to the vehicle's roll rate.

[0098] It should be understood that the controller combines the base time with the severity of the collision and the risk of vehicle posture through the above formula. The acceleration correction term reflects the magnitude of the collision impact based on the difference between the maximum acceleration and the acceleration threshold, while the roll rate correction term reflects the risk of vehicle rollover. After being adjusted by weighting coefficients, the two are added to the base time to obtain the suppression duration, thereby achieving fine-grained adaptation to different collision conditions. This ensures that the safety buffer period matches the severity of the accident, avoiding both excessively short suppression time leading to secondary injuries and excessively long time delaying escape.

[0099] This embodiment, through the above-described scheme, calculates the duration of a dynamic adaptive time window in real time based on sensor data; and presets a duration threshold based on the duration of the dynamic adaptive time window. This allows for dynamic calculation of the preset duration threshold based on real-time sensor data, ensuring that the duration of the safety buffer period matches the severity of the collision and the risk of vehicle posture. This avoids situations where a fixed threshold is used, resulting in either an insufficiently short suppression time to effectively prevent secondary injuries or an excessively long time that delays occupant escape. Consequently, it achieves an optimal balance between safety protection and escape efficiency under different collision conditions, improving the system's adaptability and reliability.

[0100] Furthermore, Figure 7 This is a flowchart illustrating the sixth embodiment of the method for smoothly opening an electric sliding door after a collision according to the present invention. Figure 7 As shown, based on the first embodiment, the sixth embodiment of the method for smoothly opening an electric sliding door after a collision is proposed. In this embodiment, after step S30, the smooth opening of the electric sliding door after a collision further includes the following steps: Step S40: When it is detected that the current vehicle rollover angle exceeds the preset angle and continues, the current control logic is upgraded to gravity-assisted unlocking logic to suppress electric opening but automatically unlock the mechanical lock.

[0101] It should be noted that when the vehicle rollover angle is detected to exceed the preset threshold and persists, the controller will switch the current control strategy to gravity-assisted unlocking logic. In this mode, the electric opening function is suppressed to prevent the motor from being damaged or malfunctioning under abnormal posture. At the same time, the mechanical latch is automatically unlocked, and gravity is used to assist the door opening. This ensures that even if the electric mechanism fails or is obstructed due to abnormal vehicle posture, the occupants can still escape smoothly by mechanical means, improving the reliability of escape under extreme conditions.

[0102] Accordingly, after step S30, the smooth opening of the electric sliding door after a collision also includes the following steps: Upon detecting a water level sensor trigger or a change in water pressure detected by the air pressure sensor, the post-collision suppression state is skipped, and an immediate attempt is made to electrically open or unlock the mechanical mechanism.

[0103] Understandably, when the water level sensor triggers or the air pressure sensor detects a change in water pressure indicating that the vehicle is at risk of flooding, the controller prioritizes wading escape over the post-collision suppression logic, skips the preset safety buffer timer, and immediately performs electric opening or mechanical unlocking operations to ensure that occupants can escape quickly before the vehicle completely sinks, avoiding missing the best escape opportunity by waiting for the collision suppression period to end, thereby improving the survival rate in extreme wading conditions.

[0104] Accordingly, after step S30, the smooth opening of the electric sliding door after a collision also includes the following steps: When a battery pack collision damage is detected, resulting in a decrease in insulation resistance, the high-voltage relay is disconnected first after the suppression period ends, and then the low-voltage door control is restored.

[0105] It should be understood that when a battery pack is detected to have a high voltage leakage risk due to a decrease in insulation resistance caused by a collision, the controller will prioritize cutting off the high voltage relay after the suppression period ends to eliminate the risk of electric shock. Then, it will restore the low voltage door control function. This ensures that the occupants are protected from the risk of high voltage electric shock while using the low voltage system to ensure the availability of the door escape route, thus achieving coordinated control of high voltage safety and low voltage escape functions.

[0106] Accordingly, after step S30, the smooth opening of the electric sliding door after a collision also includes the following steps: When the vehicle side airbag of the current vehicle is detected to have deployed, the preset duration threshold is automatically extended or the electric opening of the current side electric sliding door is prohibited.

[0107] It should be noted that when the deployment of the side airbags is detected, indicating a serious collision on that side, the controller will take stricter protective measures for the door on the current side. This may involve automatically extending the preset time threshold to increase the safety buffer time, or directly prohibiting the electric opening of the electric sliding door on the current side. This will prevent secondary injuries caused by damage to the side body structure or external environmental hazards after the door is opened, thus ensuring the safety of the occupants' escape on the side of the collision.

[0108] Accordingly, after step S30, the smooth opening of the electric sliding door after a collision also includes the following steps: If the seatbelt is detected not being released during the post-collision suppression state or before the electric opening function is restored, the electric function is delayed or a voice prompt is issued.

[0109] Understandably, the controller continuously monitors the seatbelt release status during this period. If it detects that the seatbelt has not been released, it will take measures such as delaying the restoration of the electric function or issuing a voice prompt to ensure that the occupants are ready to escape before the door opens. This avoids the situation where the occupants cannot evacuate in time due to the seatbelt restraint caused by the sudden opening of the door. The controller also guides the occupants to release the restraint or prepare in advance through voice prompts, thereby improving the safety of the escape process.

[0110] Optionally, after step S10, the smooth opening of the electric sliding door after a collision further includes the following steps: When the vehicle collision signal is detected, the current suppression status of the door and the estimated recovery time are sent to the cloud.

[0111] It should be understood that when the controller detects a vehicle collision signal, it actively sends the current suppression status information of the door and the estimated recovery time information calculated based on the current timing progress to the cloud server, thereby realizing remote monitoring and data synchronization. This allows the cloud platform to promptly grasp the vehicle's safety status and provide data support for subsequent rescue dispatch or user reassurance, enhancing the collision response capability in the vehicle-to-everything (V2X) environment.

[0112] Optionally, after step S10, the smooth opening of the electric sliding door after a collision further includes the following steps: Determine whether the current vehicle is undergoing an OTA upgrade. When the vehicle is currently undergoing an OTA upgrade, if a safety default mode is forcibly executed, the safety default mode is to maintain the post-collision suppression state until the upgrade is completed or manual intervention is required.

[0113] Understandably, the controller first determines whether the vehicle is currently undergoing an Over-The-Air (OTA) upgrade. If so, it enforces the safety default mode, which maintains the post-collision suppression state until the upgrade is complete or manual intervention is required. This avoids abnormal or malfunctioning door control logic due to system software instability, resource consumption, or communication interruption during the upgrade process, ensuring that the doors remain in a safe locked state until the system returns to stability under special maintenance conditions.

[0114] In practical implementation, to address the issue that after a collision, the electric sliding door, lacking an internal mechanical door handle, can only be opened and unlocked from the inside of the vehicle via an emergency handle, which is a two-step process (pulling open the cover + pulling the cable), partially hidden in the map pocket and difficult to operate, leading to user complaints, this embodiment proposes a control method for the smooth opening of the electric sliding door after a collision: after a collision, the second-row sliding door maintains its electric function without interruption, and an internal design is added to maintain a 5-second suppression (the purpose is to prevent rollover and secondary collisions, or accidental door opening causing damage). After 5 seconds, the electric function should be normal, and the customer should be able to open the door using the familiar opening method.

[0115] It should be noted that after a collision, the sliding doors of the second row maintain their electric function without interruption, and an internal design is added to maintain suppression for X seconds (the purpose of which is to prevent rollover and secondary collisions, or damage caused by accidental door opening). After X seconds, the electric function needs to be normal, and the customer can open the door using the familiar opening method. This resolves the contradiction between "mechanical handles being difficult to operate" and "electric door opening being unsafe", achieving a balance between intelligent, adaptive passive safety and active escape.

[0116] In its specific implementation, the X-second suppression mechanism in this embodiment is as follows: 1) Specific thresholds and judgment conditions for collision signal detection Collision signal detection: A fusion strategy is adopted, which combines the hard-wired signal from the acceleration sensor, the airbag controller (ACU), and the door pressure sensor.

[0117] Acceleration thresholds: A dual threshold mechanism is set. Level 1 warning (low speed): Longitudinal / lateral acceleration > 3g and duration > 10ms. Level 2 confirmation (high speed / severe): Longitudinal / lateral acceleration > 15g or ACU issues a Crash_Confirmed signal.

[0118] Rate of change determination: An acceleration change rate >50g / s² is introduced as an auxiliary criterion to distinguish between emergency braking and a real collision. De-jitter logic: The signal must be held continuously above the threshold for at least 5ms to prevent false triggering caused by road bumps.

[0119] 2) Precise triggering mechanism and timing method for X-second timing Trigger moment definition: The timing start point T0 is defined as the rising edge of the Crash_Confirmed signal transitioning from low to high, rather than the physical instant of the collision.

[0120] Timer type: Uses an independent hardware timer inside the vehicle MCU, instead of software loop counting, to ensure accurate timing even when the main program crashes or freezes.

[0121] Power failure retention: If a collision causes the main power supply to be cut off, the system must rely on a supercapacitor or backup battery to keep the MCU and door lock drive circuit working for at least 10 seconds to ensure that the X-second timing is completed and subsequent actions are executed.

[0122] 3) Specific logic for preventing malfunctions during the suppression period Input masking: During the T0+X seconds, the MCU software directly ignores door opening requests from the following sources: micro-switch signals of the interior and exterior door handles, unlocking commands from the remote key / mobile phone Bluetooth key, and soft switch commands from the central control screen IVI, etc.

[0123] Output lockout: Cuts off the current loop to the drive mechanism motor. Even if there is a software logic error, the motor cannot be driven at the hardware level.

[0124] Abnormal handling: If a secondary collision signal is detected during this period (acceleration exceeds the threshold again), the timer is immediately reset and the countdown of X seconds is restarted to prevent the door from being opened while the vehicle is unstable.

[0125] 4) Detailed switching process for resuming electric function after X seconds Status self-check: After X seconds of timing, the system performs a quick self-check (<100ms): Check if the battery voltage is within the normal operating range (e.g., 9V-16V).

[0126] Check if the motor circuit is short-circuited or open-circuited.

[0127] Tiered recovery strategy: Scenario A (System Normal): Automatically remove input blocking and restore the full-function mode of the electric sliding door (PSD).

[0128] Situation B (Unstable but usable power): Enter "Restricted Mode", allowing only one-time inching to open the door, and prohibiting automatic full opening to prevent power depletion.

[0129] Situation C (System Failure): Remain in a suppressed state and prompt the user via the instrument panel / audio-visual alarm to "Please use the mechanical emergency handle".

[0130] Smooth switching: The motor driver uses PWM soft start to avoid voltage drop caused by sudden large electric shocks.

[0131] 5) Differentiated processing strategies for different collision intensities are shown in Table 1 below.

[0132] Table 1. Examples of Differentiated Processing Strategies

[0133] Virtual test 1) Collision test data Vehicle dynamic stability time statistics: According to the New Car Assessment Program (NCAP) or rollover test video analysis data from the Insurance Institute for Highway Safety (IIHS), the average time from the moment of impact to when the vehicle comes to a complete stop after a side collision or rollover is 3.2 seconds to 4.5 seconds.

[0134] Conclusion: Setting an X-second suppression period covers more than 95% of the periods of vehicle dynamic instability, which can effectively prevent the doors from accidentally opening during vehicle sliding or rolling, causing occupants to be thrown out.

[0135] Secondary collision risk simulation: The probability of a vehicle swerving or moving again is highest within the first 3 seconds after a collision. An X-second waiting period can reduce the risk of secondary loss of control caused by changes in the center of gravity or increased wind resistance due to door opening by 80%.

[0136] 2) Comparison of user operation efficiency in simulated collisions Group A: No inhibition (immediate electric door opening).

[0137] Group B: This plan (automatic recovery of motor after X seconds of suppression).

[0138] Group C: Traditional approach (permanent suppression, forced use of mechanical handles).

[0139] Test results (example data): Door opening success rate: Group A 98%, Group B 96%, Group C 75% (Reason: After a collision, the mechanical handle may be obstructed, deformed, or the occupant may be injured and unable to pull it).

[0140] Average door opening time: Group A 1.5s (but dangerous in motion), Group B 6.2s (5s waiting + 1.2s electric execution), Group C 12.5s (finding the handle + pulling hard + mechanical resistance).

[0141] Conclusion: This solution, while ensuring safety, is more than 50% faster than a purely mechanical emergency solution, significantly improving the utilization rate of the golden rescue time.

[0142] 3) Safety assessment -- Injury to occupants caused by accidental opening of the vehicle door after a collision.

[0143] After introducing the X-second suppression mechanism, the probability of this event occurring is reduced to 10⁻⁸ / h, which meets the safety target requirements of ASIL-D level.

[0144] Electrical safety: Demonstrates that in the event of a short circuit caused by a collision-induced wire harness compression, the power cut-off logic within X seconds can effectively prevent the sliding door drive motor from becoming an ignition source.

[0145] 4) Compare the test results Variable testing: The inhibition time was tested at 3s, 5s, 8s, 8s, and 10s respectively.

[0146] 3s: In the violent rollover test, in 15% of the cases, the vehicle was not completely stopped when the door was opened.

[0147] 8s / 10s: Although safety is slightly increased, in water immersion or fire simulation scenarios, the occupant escape window is unnecessarily compressed, resulting in a 20% increase in the risk of suffocation or burns.

[0148] Conclusion: X seconds is the optimal solution for both safety and escape efficiency.

[0149] The X-second suppression in this embodiment can also employ a dynamic adaptive time window, covering a configurable range of 3 to 10 seconds, and calculate the optimal duration in real time based on sensor data.

[0150]

[0151] in, To suppress duration, Based on time, For acceleration weighting coefficients, This represents the maximum acceleration during the collision. For acceleration threshold, For the rollover weighting coefficient, This refers to the vehicle's roll rate.

[0152] The control method in this embodiment is not only applicable to traditional wire rope traction electric sliding doors, but also to gear and rack drive mechanisms and wire-controlled sliding doors (pure electric drive doors without mechanical connections).

[0153] The vehicle types are not limited to MPVs, sport utility vehicles (SUVs) (with sliding doors), and even future autonomous baby buses (vehicles without B-pillars).

[0154] The handling logic of this patented control method for special scenarios (extreme working conditions): 1) Vehicle rollover: Based on gyroscope data, if a rollover angle >90° is detected and continues, the suppression logic is upgraded to "gravity-assisted unlocking": suppress electric opening (to prevent motor reversal and injury), but automatically unlock the mechanical lock (using gravity to open the door).

[0155] 2) Water collision: If the water level sensor triggers or the air pressure sensor detects a change in water pressure, the system will skip the X-second suppression and immediately attempt a brief electric opening (utilizing the water pressure difference window) or directly unlock the mechanical mechanism to prioritize drowning prevention.

[0156] 3) High-voltage power failure risk: For electric vehicles, if the battery pack is detected to be damaged by collision (decreased insulation resistance), the system should send a command to cut off the high-voltage relay after the suppression period ends, and then restore the low-voltage door control.

[0157] The linkage mechanism between this patented control method and other vehicle safety systems: 1) In coordination with airbags: If the side airbag has deployed, the system determines that there is a risk of high temperature or sharp fragments in the area of ​​the door on that side, and automatically extends the inhibition time or prohibits the electric opening of that side, guiding passengers to evacuate from the other side.

[0158] 2) In conjunction with seat belt pretensioners: During the restraint period, if the seat belt is detected not to be released (occupant is still restrained), the system can gradually resume the electric function or prompt "Please unfasten your seat belt first" via voice.

[0159] 3) Integration with E-Call (Emergency Call): When a collision signal is triggered, the "door suppression status" and estimated recovery time are sent to the cloud so that rescue personnel can predict the entry method.

[0160] The compatibility handling method in this embodiment during the software upgrade (OTA) process: 1) Version rollback protection: If a collision occurs during the OTA upgrade process, the system should force the execution of the "safe default mode" (i.e., use the stable suppression logic of the previous version or the most conservative mechanical priority logic), and strictly prohibit the execution of new control strategies before the upgrade verification is completed.

[0161] 2) Parameter cloud distribution: It is advocated that protection be provided by dynamically distributing and adjusting the "suppression time threshold" through remote servers based on different regional regulations (such as EU ECE R11, China GB) or accident big data statistics.

[0162] Signal link (the link varies depending on the architecture): Airbag Control Unit (ACU) → Vehicle Interface Unit Left (VIUL) → Power Sliding Door Left / Right (PSD_L / PSD_R).

[0163] Control logic: See Figure 8 , Figure 8 This is the signal logic diagram corresponding to the method for smoothly opening an electric sliding door after a collision, as shown in the present invention. Figure 8 As shown, the collision signal will not be set to zero after a collision. The sliding door is prohibited from operating for X seconds after the collision signal changes from 0. After X seconds, even if the collision signal is not 0, the door is allowed to operate electrically.

[0164] This embodiment has the following technical effects: 1) It provides the maximum styling space for the sliding door interior panel while ensuring safety and customer usage habits; 2) It achieves functionality at zero cost without changing the hardware through software optimization and upgrades; 3) It enables the optimized software to be installed in the vehicle through OTA upgrades, minimizing losses caused by changes in design and logistics.

[0165] This embodiment, through the above-described scheme, upgrades the current control logic to gravity-assisted unlocking logic when the current vehicle rollover angle exceeds a preset angle and remains thereafter. This suppresses electric opening but automatically unlocks the mechanical latch. When a water level sensor triggers or a pressure sensor detects a change in water pressure, the post-collision suppression state is skipped, and an electric opening or unlocking of the mechanical mechanism is immediately attempted. When battery pack damage due to a collision causes a decrease in insulation resistance, the high-voltage relay is preferentially cut off after the suppression period ends, and then low-voltage door control is restored. If a seatbelt is detected not being released during the post-collision suppression state or before restoring the electric opening function, the electric function is delayed or a voice prompt is issued. When a vehicle collision signal is detected, the current door suppression state and estimated recovery time information are sent to the cloud to determine the... The system indicates whether the vehicle is currently undergoing an OTA upgrade. If the vehicle is undergoing an OTA upgrade, and a safety default mode is forcibly executed, the safety default mode maintains the post-collision suppression state until the upgrade is completed or manual intervention is required. This mode can adaptively adjust the door opening strategy and priority under extreme conditions such as rollover, water wading, and electrical leakage by monitoring and controlling multiple dimensions of vehicle posture, water level, high pressure status, occupant restraint system, and software upgrade status. This ensures that occupants can obtain the optimal escape opportunity and method when facing different safety risks. At the same time, it combines cloud communication and seat belt reminders to improve rescue efficiency and operational safety, and maintains a safety lock state during system maintenance. This comprehensively improves the reliability of escape, system stability, and occupant safety protection capabilities in complex post-collision scenarios.

[0166] Accordingly, the present invention further provides a device for smoothly opening an electric sliding door after a collision.

[0167] Reference Figure 9 , Figure 9 This is a functional block diagram of the first embodiment of the electric sliding door opening device after collision according to the present invention.

[0168] In the first embodiment of the electric sliding door collision-smooth opening device of the present invention, the electric sliding door collision-smooth opening device includes: The suppression state control module 10 is used to control the electric sliding door to enter a post-collision suppression state that maintains power supply in response to a vehicle collision signal.

[0169] The timing module 20 is used to block the door opening command and start a hardware timer to keep track of the time in the post-collision suppression state.

[0170] The recovery module 30 is used to release the post-collision suppression state and restore the electric start function when the cumulative timing time of the hardware timer reaches a preset duration threshold.

[0171] The steps for implementing each functional module of the device for smoothly opening the electric sliding door after a collision can be referred to in the various embodiments of the method for smoothly opening the electric sliding door after a collision of the present invention, and will not be repeated here.

[0172] Furthermore, this embodiment of the invention also proposes a storage medium storing a program for the smooth opening of an electric sliding door after a collision. When the program for the smooth opening of an electric sliding door after a collision is executed by a processor, the operation described in the above embodiment of the method for the smooth opening of an electric sliding door after a collision is implemented.

[0173] Those skilled in the art will understand that all or part of the steps in the methods described above can be implemented by a program instructing related hardware. The program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium is a computer-readable storage medium, including: USB flash drive, mobile hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and other media that can store program code.

[0174] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0175] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0176] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for smoothly opening an electric sliding door after a collision, characterized in that, The method for smoothly opening the electric sliding door after a collision includes: In response to a vehicle collision signal, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply; In the post-collision suppression state, the door opening command is blocked and a hardware timer is started to keep track; When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric start function is restored.

2. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, The method of controlling the electric sliding door to enter a post-collision suppression state that maintains power supply in response to a vehicle collision signal includes: After the current vehicle's electric sliding door controller receives a vehicle collision signal and confirms that a collision event has occurred, it controls the electric sliding door to enter a post-collision suppression state that maintains power supply.

3. The method for smoothly opening an electric sliding door after a collision as described in claim 2, characterized in that, The step of controlling the electric sliding door to enter a post-collision suppression state while maintaining power supply after the current vehicle's electric sliding door controller receives a vehicle collision signal and confirms that a collision event has occurred includes: When the electric sliding door controller of the current vehicle receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller or door pressure sensor, and confirms that a collision event has occurred, it controls the electric sliding door to enter a post-collision suppression state that maintains power supply.

4. The method for smoothly opening an electric sliding door after a collision as described in claim 3, characterized in that, The step of controlling the electric sliding door to enter a post-collision suppression state while maintaining power supply after the current vehicle's electric sliding door controller receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller, or door pressure sensor, and confirms that a collision event has occurred, includes: When the electric sliding door controller of the current vehicle receives a vehicle collision signal from at least one of the acceleration sensor, airbag controller or door pressure sensor, the longitudinal acceleration and lateral acceleration are acquired. When the longitudinal acceleration or the lateral acceleration exceeds a preset first-level warning threshold and the duration exceeds a first preset time, a collision event is confirmed to have occurred. or, When the longitudinal acceleration or the lateral acceleration exceeds a preset secondary warning threshold, a collision event is confirmed to have occurred, wherein the preset secondary warning threshold is higher than the preset primary warning threshold; After confirming that a collision event has occurred, the electric sliding door is controlled to enter a post-collision suppression state that maintains power supply.

5. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, The step of blocking the door opening command and starting a hardware timer in the post-collision suppression state includes: In the post-collision suppression state, the current vehicle's electric sliding door controller actively ignores and blocks all door opening request signals from the micro switches of the door handles inside and outside the vehicle, the remote key, the Bluetooth key, and the soft switch of the central control screen. At the same time, the motor current circuit of the drive mechanism is cut off to physically lock the door position, preventing the door from being accidentally opened due to collision inertia or accidental contact by personnel, thus preventing secondary injuries. The hardware timer inside the electric sliding door controller is activated to start continuous timing. If a secondary collision signal is detected during the timing period, the timing is reset, and the current timing process is independent of the reset state of the collision signal.

6. The method for smoothly opening an electric sliding door after a collision as described in claim 5, characterized in that, The step of starting a continuous countdown by activating a hardware timer inside the electric sliding door controller includes: The timing is started by activating a hardware timer inside the electric sliding door controller, wherein the hardware timer is powered by a backup power source, which is a supercapacitor or an independent backup battery; When a vehicle collision causes fluctuations in the main battery voltage or a momentary power outage, the backup power supply maintains the hardware timer to continue timing, ensuring that the timing process is not interrupted.

7. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric start function is restored, including: When the cumulative timing of the hardware timer reaches the preset time threshold, the electric sliding door controller of the current vehicle determines that the safety buffer period after the collision has ended, and then releases the post-collision suppression state. Reactivate the blocked access permissions for door opening request signals from the micro switches of the inner and outer door handles, remote keys, Bluetooth keys and central control screen soft switches, and close the previously cut-off motor current circuit of the drive mechanism. Restore the electric opening function of the electric sliding door.

8. The method for smoothly opening an electric sliding door after a collision as described in claim 7, characterized in that, Restoring the electric opening function of the electric sliding door includes: Before the post-collision suppression state is lifted, a system self-test is performed to check the battery voltage and motor circuit status. If the system self-test is normal, restore the electric sliding door to full-function mode; If the power supply voltage is unstable but available, enter restricted mode, allowing only a single inching to open the door; If the system malfunctions, it will remain in a suppressed state and issue an alarm to prompt the user to use the mechanical emergency mechanism.

9. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, Before the cumulative timing of the hardware timer reaches a preset duration threshold, and the post-collision suppression state is released and the electric opening function is restored, the method for smoothly opening the electric sliding door after a collision further includes: The duration of the dynamic adaptive time window is calculated in real time based on sensor data. The preset duration threshold is determined based on the duration of the dynamic adaptive time window.

10. The method for smoothly opening an electric sliding door after a collision as described in claim 9, characterized in that, The step of determining the preset duration threshold based on the duration of the dynamic adaptive time window includes: The preset duration threshold is determined based on the base time, acceleration correction term, and rollover correction term of the dynamic adaptive time window. The acceleration correction term is the product of the acceleration weight coefficient and the difference between the maximum acceleration and the acceleration threshold during the collision process. The rollover correction term is the product of the rollover weight coefficient and the vehicle rollover angular velocity.

11. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric opening function is restored. The method for smoothly opening the electric sliding door after a collision further includes: When the current vehicle rollover angle is detected to exceed the preset angle and remain so, the current control logic is upgraded to gravity-assisted unlocking logic, which suppresses electric opening but automatically unlocks the mechanical lock.

12. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric opening function is restored. The method for smoothly opening the electric sliding door after a collision further includes: Upon detecting a water level sensor trigger or a change in water pressure detected by the air pressure sensor, the post-collision suppression state is skipped, and an immediate attempt is made to electrically open or unlock the mechanical mechanism.

13. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric opening function is restored. The method for smoothly opening the electric sliding door after a collision further includes: When a battery pack collision damage is detected, resulting in a decrease in insulation resistance, the high-voltage relay is disconnected first after the suppression period ends, and then the low-voltage door control is restored.

14. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric opening function is restored. The method for smoothly opening the electric sliding door after a collision further includes: When the vehicle side airbag of the current vehicle is detected to have deployed, the preset duration threshold is automatically extended or the electric opening of the current side electric sliding door is prohibited.

15. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, When the cumulative timing of the hardware timer reaches a preset duration threshold, the post-collision suppression state is released and the electric opening function is restored. The method for smoothly opening the electric sliding door after a collision further includes: If the seatbelt is detected not being released during the post-collision suppression state or before the electric opening function is restored, the electric function is delayed or a voice prompt is issued.

16. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, After responding to a vehicle collision signal and controlling the electric sliding door to enter a post-collision suppression state with sustained power supply, the method for smoothly opening the electric sliding door after a collision further includes: When the vehicle collision signal is detected, the current suppression status of the door and the estimated recovery time are sent to the cloud.

17. The method for smoothly opening an electric sliding door after a collision as described in claim 1, characterized in that, After responding to a vehicle collision signal and controlling the electric sliding door to enter a post-collision suppression state with sustained power supply, the method for smoothly opening the electric sliding door after a collision further includes: Determine whether the current vehicle is undergoing an OTA upgrade. When the vehicle is currently undergoing an OTA upgrade, if a safety default mode is forcibly executed, the safety default mode is to maintain the post-collision suppression state until the upgrade is completed or manual intervention is required.

18. A device for smoothly opening an electric sliding door after a collision, characterized in that, The device for smoothly opening the electric sliding door after a collision includes: The suppression state control module is used to control the electric sliding door to enter a post-collision suppression state that maintains power supply in response to a vehicle collision signal. The timing module is used to block the door opening command and start a hardware timer to keep track of the time in the post-collision suppression state; The recovery module is used to release the post-collision suppression state and restore the electric start function when the cumulative timing time of the hardware timer reaches a preset duration threshold.

19. A device for smoothly opening an electric sliding door after a collision, characterized in that, The device for smoothly opening an electric sliding door after a collision includes: a memory, a processor, and an electric sliding door smooth opening program stored in the memory and executable on the processor, wherein the electric sliding door smooth opening program is configured to implement the steps of the electric sliding door smooth opening method as described in any one of claims 1 to 17.

20. A storage medium, characterized in that, The storage medium stores a program for the smooth opening of an electric sliding door after a collision. When the processor executes the program for the smooth opening of an electric sliding door after a collision, it implements the steps of the method for the smooth opening of an electric sliding door after a collision as described in any one of claims 1 to 17.

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