Vehicle door unlocking method and system used after vehicle collision power failure

Abstract

The invention relates to the technical field of automobiles, in particular to a vehicle door unlocking method and system used after vehicle collision power failure. The vehicle door unlocking method used after vehicle collision and power failure comprises the following steps that S1, a controller continuously detects a power supply voltage value of a storage battery power source, and when the power supply voltage value cannot reach a system failure critical value, an electric quantity release switch of a capacitor bank power supply module is turned on; s2, the capacitor bank power supply module supplies power to a controller and a door lock motor; and S3, the controller drives a rotor of a door lock motor to rotate, vehicle door unlocking is completed, and vehicle door unlocking can be achieved under the condition that power supply of the controller is cut off.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a method and system for unlocking vehicle doors after power failure during a vehicle collision. Background Art

[0002] If a collision occurs while the vehicle is in motion, the vehicle's battery power may be cut off for various reasons (e.g., a severe collision that causes the power output to be passively cut off, or the vehicle actively shuts off for safety reasons). In this case, the door lock system loses power due to a loss of power input, and the controller loses power and cannot unlock, affecting occupants' escape and external rescue efforts.

[0003] The current solution to the problem of doors not unlocking properly due to a power outage after a collision is to use a backup battery as the unlocking output or to strengthen the structural safety of the vehicle's battery and battery power circuit. However, this approach significantly increases structural costs. Furthermore, in severe collision scenarios where power outages are implemented to prevent leakage and greater damage (such as vehicle fires), door unlocking may be affected by factors such as unlocking time and force, resulting in unsuccessful unlocking. Summary of the Invention

[0004] The present invention aims to provide a method and system for unlocking vehicle doors after power failure due to a vehicle collision, which can achieve vehicle door unlocking when the power supply to the controller is cut off.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: In a first aspect, the present invention provides a method for unlocking a vehicle door after a power outage due to a vehicle collision, comprising the following steps: S1: The controller continuously detects the supply voltage of the battery power supply. When the supply voltage fails to reach the critical value of system failure, the power release switch of the capacitor bank power supply module is turned on. S2: The capacitor bank power supply module supplies power to the controller and door lock motor; S3: The controller drives the rotor of the door lock motor to rotate, completing the door unlocking.

[0006] By implementing this technical solution, when the system is operating normally, the battery power supply charges the capacitor bank power module and maintains normal controller operation. If a vehicle collision occurs and the battery power is cut off, the controller detects a power outage and opens the capacitor bank power supply module's charge release switch, rapidly discharging the capacitor bank's charge to the controller and door lock motor. Once the DCU controller determines that the capacitor charge has been discharged and the system voltage has returned to normal, it immediately controls the motor to unlock via control link C, completing the door unlocking process. This process allows the door to be unlocked even when the controller power is cut off.

[0007] Optionally, the step S1 further includes: when the power supply voltage value is normal, the battery power supply continuously supplies power to the controller and the door lock motor, and charges the capacitor group power supply module.

[0008] Optionally, the controller detects the supply voltage value through an A / D converter.

[0009] Optionally, the battery power supply is a 12V voltage supply.

[0010] Optionally, there are two or four door lock motors.

[0011] Optionally, the controller adopts one of CPU, MCU, ARM architecture controller, CPLD, FPGA, and new energy vehicle controller.

[0012] In a second aspect, the present invention provides a vehicle door unlocking system after a power outage due to a vehicle collision, which is used to implement a vehicle door unlocking method after a power outage due to a vehicle collision as described in any one of the first aspects, including: a controller, a battery power supply, a capacitor group power supply module and multiple door lock motors; the controller is respectively communicated with the capacitor group power supply module and the multiple door lock motors, the battery power supply is respectively electrically connected to the controller, the capacitor group power supply module and the multiple door lock motors, and the capacitor group power supply module is respectively electrically connected to the controller and the multiple door lock motors.

[0013] In summary, the present invention has at least the following beneficial technical effects: 1. Solved the problem of instantaneous failure of the controller when the controller-battery power output is disconnected.

[0014] 2. The capacitor group power supply module is used for independent power supply. When the battery power is disconnected, the controller can actively switch to the capacitor power supply mode to maintain the normal operation of the controller for a period of time.

[0015] 3. Solved the problem that the vehicle cannot be unlocked when the battery power output is disconnected due to a serious collision and the vehicle power-related management module actively or abnormally shuts down the battery power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic block diagram of a first process of a method for unlocking a vehicle door after a power outage due to a vehicle collision according to an embodiment of the present invention; Figure 2 This is a schematic block diagram of a second process of a method for unlocking a vehicle door after a power outage due to a vehicle collision according to an embodiment of the present invention; Figure 3 This is a schematic block diagram of the structure of a door unlocking system for a vehicle after a power outage due to a vehicle collision according to an embodiment of the present invention; Figure 4 This is a technical rendering.

[0017] Explanation of the accompanying symbols: 1. Controller; 2. Battery power supply; 3. Capacitor bank power supply module; 4. Door lock motor. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The terms used in the following embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include plural expressions, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in the present invention refers to and includes any or all possible combinations of one or more of the listed items. The term "exemplary" means "used as an example, embodiment or illustrative", and any embodiment described here as "exemplary" is not necessarily interpreted as being superior to or better than other embodiments. The terms "first" and "second" are used for descriptive purposes only and are not to be understood as implying or suggesting relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0020] An embodiment of the present invention provides a method for unlocking vehicle doors after power failure due to a vehicle collision.

[0021] refer to Figure 1 A method and system for unlocking a vehicle door after a power outage due to a vehicle collision, comprising the following steps: S1: The controller 1 continuously detects the supply voltage value of the battery power supply 2. When the supply voltage value fails to reach the critical value of the system failure, the power release switch of the capacitor bank power supply module 3 is turned on.

[0022] When the vehicle is not involved in a collision, the system is operating normally. Battery power supply 2 continuously supplies power to controller 1 and door lock motor 4, and charges capacitor bank power module 3. At this point, controller 1 detects a normal supply voltage via the A / D converter, and controller 1 operates normally. Under its control, controller 1 can normally drive the driving end of door lock motor 4 to rotate and unlock the vehicle door.

[0023] When the vehicle collides and the power is cut off, the battery power supply 2 is cut off or the supply voltage value cannot reach the system failure critical value. The battery power supply 2 cannot continuously supply power to the controller 1 and the door lock motor 4. The controller 1 cannot normally drive the driving end of the door lock motor 4 to rotate and unlock the vehicle door. The controller 1 turns on the power release switch of the capacitor group power supply module 3.

[0024] Specifically, the controller 1 uses the power supply voltage value as the judgment condition for the power-off state when the collision occurs, that is, when the power supply voltage value collected by the A / D converter drops to the MCU reset voltage value of the controller 1, the system is in the power-off state. Figure 3 , link A is cut off, and the controller 1 determines that a power outage occurs, and opens the power release switch of the capacitor bank power supply module 3 by controlling link D.

[0025] Battery power supply 2 is powered by a 12V voltage. It should be understood that battery power supply 2 can also be powered by voltages of other strengths; this is merely an example. Controller 1 can include a CPU (central processing unit), an MCU (microcontroller unit), an ARM architecture controller, a CPLD (complex programmable logic device), an FPGA (field programmable gate array), or a new energy vehicle controller (including an integrated controller integrating a vehicle control unit (VCU), an engine control unit (ECU), a motor control unit (MCU), and a battery management system (BMS)). In this application, controller 1 is a DCU controller.

[0026] Generally speaking, each vehicle door has one door lock motor 4. A two-door vehicle has two door lock motors 4, and a four-door vehicle has four door lock motors 4. The number of door lock motors 4 can be determined based on actual conditions. In the embodiment of the present application, the number of door lock motors 4 is four. In other embodiments, the number of door lock motors 4 can also be two.

[0027] S2: The capacitor bank power supply module 3 supplies power to the controller 1 and the door lock motor 4.

[0028] Reference Figure 2 After controller 1 turns on the power release switch of capacitor bank power supply module 3, the capacitor power in capacitor bank power supply module 3 is quickly released to controller 1 and the four door lock motors 4 via link B, thus providing power to controller 1 and the four door lock motors 4. At this point, capacitor bank power supply module 3 raises the voltage of controller 1 to the supply voltage value within 1ms.

[0029] S3: The controller 1 drives the rotor of the door lock motor 4 to rotate, completing the unlocking of the vehicle door.

[0030] refer to Figure 2When the DCU controller determines that the capacitor charge is released and the system voltage returns to normal, the controller 1 immediately executes the unlocking logic and controls the driving end of the door lock motor 4 to rotate in the unlocking direction through the control link C to complete the door unlocking within the required time.

[0031] An embodiment of the present invention further provides a vehicle door unlocking system for use after a vehicle crashes and loses power.

[0032] refer to Figure 3 A vehicle door unlocking system after power failure due to a vehicle collision includes: a controller 1, a battery power supply 2, a capacitor group power supply module 3 and multiple door lock motors 4.

[0033] The controller 1 is respectively connected to the capacitor bank power supply module 3 and the multiple door lock motors 4. The battery power supply 2 is respectively connected to the controller 1, the capacitor bank power supply module 3 and the multiple door lock motors 4. The capacitor bank power supply module 3 is respectively connected to the controller 1 and the multiple door lock motors 4.

[0034] By using an external capacitor bank power supply module 3, the system maintains normal operation even when the battery power supply 2 output is disconnected. Therefore, in the event of a vehicle collision, unlocking can be performed regardless of whether the vehicle battery is functioning properly. This improves the reliability of unlocking during a collision.

[0035] Technical effects such as Figure 4 As shown in the figure. Pink curve: front door lock unlocking drive line; green curve: rear door lock unlocking drive line; blue curve: DCU power supply voltage; yellow curve: DCU power supply voltage.

[0036] The various variations and specific examples of the method for unlocking a door after a power outage due to a vehicle collision provided in the above-mentioned embodiment are applicable to the door unlocking system for unlocking a door after a power outage due to a vehicle collision in this embodiment. Through the above-mentioned detailed description of the method for unlocking a door after a power outage due to a vehicle collision, those skilled in the art can clearly understand the implementation method of the door unlocking system for unlocking a door after a power outage due to a vehicle collision in this embodiment. For the sake of brevity of the specification, it will not be described in detail here.

[0037] As described above, the above embodiments are only used to provide a detailed introduction to the technical solutions of the present invention. However, the description of the above embodiments is only used to help understand the method and core concept of the present invention and should not be understood as limiting the present invention. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for unlocking a vehicle door after a power outage due to a vehicle collision, characterized in that: The following steps are involved: S1: The controller (1) continuously detects the supply voltage value of the battery power supply (2), and when the supply voltage value fails to reach the critical value of system failure, the power release switch of the capacitor bank power supply module (3) is turned on; S2: The capacitor group power supply module (3) supplies power to the controller (1) and the door lock motor (4); S3: The controller (1) drives the rotor of the door lock motor (4) to rotate, thereby unlocking the vehicle door.

2. A method for unlocking a vehicle door after a power outage due to a vehicle collision as claimed in claim 1, characterized in that: The step S1 further includes: when the power supply voltage value is normal, the battery power supply (2) continuously supplies power to the controller (1) and the door lock motor (4), and charges the capacitor group power supply module (3).

3. The method for unlocking a vehicle door after a power outage due to a vehicle collision as claimed in claim 1, characterized in that: The controller (1) detects the power supply voltage value through an A / D converter.

4. The method for unlocking a vehicle door after a power outage due to a vehicle collision as claimed in claim 1, characterized in that: The battery power supply (2) is powered by a 12V voltage.

5. The method for unlocking a vehicle door after a power outage due to a vehicle collision as claimed in claim 1, characterized in that: There are two or four door lock motors (4).

6. The method for unlocking a vehicle door after a power outage due to a vehicle collision as claimed in claim 1, characterized in that: The controller (1) adopts one of CPU, MCU, ARM architecture controller, CPLD, FPGA, and new energy vehicle controller.

7. A door unlocking system for a vehicle after a power outage due to a collision, characterized in that: A method for unlocking a vehicle door after a power outage due to a vehicle collision as claimed in any one of claims 1 to 6, comprising: a controller (1), a battery power supply (2), a capacitor group power supply module (3) and a plurality of door lock motors (4); the controller (1) is respectively connected to the capacitor group power supply module (3) and the plurality of door lock motors (4) for communication; the battery power supply (2) is respectively connected to the controller (1), the capacitor group power supply module (3) and the plurality of door lock motors (4); and the capacitor group power supply module (3) is respectively connected to the controller (1) and the plurality of door lock motors (4).

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