Vehicle power-off unlocking standby device

Abstract

The invention discloses a vehicle power-off unlocking standby device. The vehicle power-off unlocking standby device is additionally arranged between an original vehicle BCM system and an ACTR module. The problem that the vehicle cannot be automatically unlocked under the condition that the current vehicle unlocking controller BCM is powered off or cannot work normally is solved, so that normal unlocking of the vehicle door can still be ensured under the condition that the vehicle unlocking controller BCM is powered off or cannot work normally.

Description

Technical Field

[0001] The invention relates to the technical field of automobiles, and in particular to a backup device for unlocking a vehicle when power is cut off. Background Art

[0002] At present, most cars have a collision unlocking function, that is, after a vehicle collision, the door is automatically unlocked to facilitate escape and rescue. Usually, the vehicle collision unlocking is that after the BCM receives the collision signal sent by the ACU, it drives the ACTR to execute the vehicle door unlocking.

[0003] Generally, when a vehicle is involved in a minor collision, the vehicle will not lose power and the door unlocking can be performed more reliably. However, in some serious collisions, the vehicle will lose power due to the breakage of the wiring harness and the detachment of the battery terminals, causing the vehicle's BCM system to fail to work properly and thus failing to unlock the door, thus hindering the escape of the driver and passengers and external rescue, and creating a great obstacle to escape and rescue. Summary of the invention

[0004] The present invention aims to provide a vehicle power-off unlocking backup device, which is used to solve the problem that the vehicle door lock cannot be automatically unlocked due to the vehicle BCM system not working properly.

[0005] To achieve the above object, the present invention adopts the following technical solutions: The vehicle power-off unlocking standby device of the present invention is added between the original vehicle BCM system and the ACTR module; the vehicle power-off unlocking standby device comprises a controller A, a charging module B, a backup battery C, a dual-circuit normally closed relay D, a normally open relay E, a unidirectional conducting diode H, and a unidirectional conducting diode J; The power input terminal of the original vehicle BCM system is connected to the vehicle power-off judgment input terminal of the controller A, and is connected to the power input terminal of the controller A through the unidirectional conducting diode H, and is also connected to the coil of the dual-circuit normally closed relay D; The enabling end of the original vehicle BCM system is connected to the enabling end of the controller A through the unidirectional conducting diode J; The power output end of the backup battery C is connected to a contact of the dual-circuit normally closed relay D; when the power input end of the original vehicle BCM system is powered off, the dual-circuit normally closed relay D is closed, and the backup battery C is discharged to the outside to provide power for the controller A. At the same time, the normally open relay E connected to a contact of the dual-circuit normally closed relay D is closed to provide an enable signal to the enable end of the controller A. When the controller A determines that the vehicle is powered off through the vehicle power-off judgment input end, it drives the ACTR module to unlock the vehicle; When the power input end of the original vehicle's BCM system is energized, the dual-circuit normally closed relay D is disconnected, cutting off the external discharge of the backup battery C, and the normally open relay E connected to one contact of the dual-circuit normally closed relay D is disconnected. The enable end of the original vehicle's BCM system provides an enable signal to the enable end of the controller A through the unidirectional conducting diode J; at the same time, controller A replenishes the backup battery through the charging module B.

[0006] Furthermore, an indicator light G is provided to indicate the working status of the vehicle power-off unlocking device and whether maintenance is required.

[0007] Further, it is installed in a single or multiple vehicle doors.

[0008] Further, controller A is activated or deactivated via an external switch or the vehicle CAN bus.

[0009] The advantages of the present invention are: Firstly, the problem that the vehicle cannot be automatically unlocked when the vehicle unlocking controller BCM is powered off or cannot work normally is solved, so that the vehicle door can still be unlocked normally when the vehicle unlocking controller BCM is powered off or cannot work normally.

[0010] Secondly, the vehicle power-off unlocking device described in the present invention is small in size and simple in circuit, and can be independently arranged for a single door or multiple doors without affecting each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Logic circuit diagram of the method of the present invention. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] like Figure 1 The figure shows the logic circuit diagram of the vehicle power-off unlocking standby device of the present invention. The vehicle power-off unlocking standby device of the present invention is installed between the original vehicle BCM system and the ACTR module to drive the vehicle door lock to unlock when the vehicle is powered off.

[0014] The vehicle power-off unlocking backup device includes a controller A, a charging module B, a backup battery C, a dual-circuit normally closed relay D, a normally open relay E, a unidirectional conducting diode H, and a unidirectional conducting diode J.

[0015] The power input terminal B+ of the original vehicle BCM system is connected to the vehicle power-off judgment input terminal SIG (pin 4) of the controller A, and is connected to the power input terminal B+ (pin 1) of the controller A through the unidirectional conducting diode H, and is also connected to the coil of the dual-circuit normally closed relay D. In order to expand the scope of action of the vehicle power-off unlocking device of the present invention, the power supply position of the vehicle power-off unlocking device of the present invention should be installed as close as possible to the power input terminal B+ of the original vehicle BCM system.

[0016] The vehicle power failure judgment signal input terminal SIG (pin 4) of controller A is effective at low level. That is, when the power input terminal B+ of the original vehicle BCM system is powered, the vehicle power failure judgment signal input terminal SIG (pin 4) of controller A will be high level, which can be judged that the vehicle is not powered off. When the power input terminal B+ of the original vehicle BCM system is powered off, the vehicle power failure judgment signal input terminal SIG (pin 4) of controller A will be low level, which can be judged that the vehicle is powered off.

[0017] The first terminal and the second terminal of the two-way normally closed relay D are connected in parallel to the coil of the normally open relay E. The third terminal of the two-way normally closed relay D is connected to the power output terminal of the backup battery C; the fourth terminal of the two-way normally closed relay D is connected to the first terminal of the normally open relay E, and is also connected to the power input terminal B+ (pin 1) of the controller A. The second terminal of the normally open relay E is connected to the enable terminal IGN (pin 2) of the controller A.

[0018] The enable terminal IGN of the original vehicle BCM system is connected to the enable terminal IGN (pin 2) of the controller A through the unidirectional conducting diode J.

[0019] When the power input terminal B+ of the original vehicle BCM system is not powered off (powered), the power input terminal B+ of the original vehicle BCM system is connected to the coil of the two-way normally closed relay D, causing the two-way normally closed relay D to be disconnected. The normally open relay E connected to the two-way normally closed relay D is also in a disconnected state. At this time, the backup battery C cannot supply power to the power input terminal B+ (pin 1) and the enable terminal IGN (pin 2) of the controller A. Instead, the power input terminal B+ of the original vehicle BCM system supplies power to the power input terminal B+ (pin 1) of the controller A through the unidirectional conduction diode H, and the enable terminal IGN of the original vehicle BCM system is connected to the enable terminal IGN (pin 2) of the controller A through the unidirectional conduction diode J, providing an enable signal for the enable terminal IGN (pin 2) of the controller A. The controller A provides supplementary power to the backup battery through the charging module B.

[0020] When the power input terminal B+ of the original vehicle BCM system is powered off, the enable terminal IGN of the original vehicle BCM system is not necessarily powered off, but the two-way normally closed relay D is reset due to the power input terminal B+ of the original vehicle BCM system, so that the backup battery C starts to discharge to the outside. At this time, the backup battery C is connected to the power input terminal B+ (pin 1) of the controller A through the two-way normally closed relay D. The controller A is powered by the backup battery C so that the controller A can continue to work. At the same time, the backup battery C is connected to the coil of the normally open relay E through the two-way normally closed relay D, so that the normally open relay E is closed, thereby powering the enable terminal IGN (pin 2) of the controller A, so that the controller A can act. Then, according to the settings of the controller, the ACTR module is driven to unlock the vehicle, so that the vehicle door lock can still be driven to unlock when the whole vehicle is powered off.

[0021] At the same time, the vehicle power-off unlocking standby device of the present invention also has an indicator light G for indicating the working state of the vehicle power-off unlocking device and whether it needs maintenance. After the controller A is powered on, it can indicate whether it works normally or needs maintenance.

[0022] Since the vehicle power-off unlocking backup device of the present invention has a simple circuit and a small size, it can be installed in a single or multiple doors. For example, if the device is installed only in the driver's door, the driver's door can be automatically unlocked when the whole vehicle is powered off. If the device is installed in all four doors, all doors can be automatically unlocked after the whole vehicle is powered off, thereby improving the efficiency of rescue and escape.

[0023] To ensure the reliability of this function, the vehicle power-off unlocking backup device of the present invention can use two or more relays for redundancy design; and the controller A only performs one-way unlocking drive, and does not perform locking drive.

[0024] In order to facilitate production assembly and after-sales maintenance, the vehicle power-off unlocking standby device of the present invention can be controlled to enable or disable the system through an external switch F or a CAN bus.

[0025] Compared with the prior art, which can only unlock the door when the vehicle is powered on, the vehicle power-off unlocking backup device of the present invention improves the technical solution, and can still unlock the door when the original vehicle controller (BCM) that controls vehicle unlocking is powered off due to a serious collision or a break in the original vehicle wiring harness. The present invention expands the application scenarios, realizes the core function of unlocking even in the case of power failure, solves the core safety demands of users, and provides a reliable escape and rescue device.

[0026] The present invention uses a controller A and a logic circuit composed of conventional electrical components such as a charging module B, a backup battery C, a dual-circuit normally closed relay D, a normally open relay E, a unidirectional forward diode H, a unidirectional forward diode J, etc. When the vehicle is powered normally and no power outage occurs, the system can execute the system working state and replenish the backup battery. After determining that a power outage occurs, the backup battery can be automatically started to supply power to ensure that the vehicle door lock is opened.

[0027] The vehicle power-off unlocking standby device of the present invention also has a power-on self-test function and outputs a self-test result, so that the user can judge whether the system is working normally or whether maintenance is needed.

Claims

1. A vehicle power-off unlocking backup device, characterized in that: The vehicle power-off unlocking backup device is added between the original vehicle BCM system and the ACTR module; the vehicle power-off unlocking backup device includes a controller A, a charging module B, a backup battery C, a dual-circuit normally closed relay D, a normally open relay E, a unidirectional conducting diode H, and a unidirectional conducting diode J; The power input terminal of the original vehicle BCM system is connected to the vehicle power-off judgment input terminal of the controller A, and is connected to the power input terminal of the controller A through the unidirectional conducting diode H, and is also connected to the coil of the dual-circuit normally closed relay D; The enabling end of the original vehicle BCM system is connected to the enabling end of the controller A through the unidirectional conducting diode J; The power output end of the backup battery C is connected to a contact of the dual-circuit normally closed relay D; when the power input end of the original vehicle BCM system is powered off, the dual-circuit normally closed relay D is closed, and the backup battery C is discharged to the outside to provide power for the controller A. At the same time, the normally open relay E connected to a contact of the dual-circuit normally closed relay D is closed to provide an enable signal to the enable end of the controller A. When the controller A determines that the vehicle is powered off through the vehicle power-off judgment input end, it drives the ACTR module to unlock the vehicle; When the power input end of the original vehicle's BCM system is energized, the dual-circuit normally closed relay D is disconnected, cutting off the external discharge of the backup battery C, and the normally open relay E connected to one contact of the dual-circuit normally closed relay D is disconnected. The enable end of the original vehicle's BCM system provides an enable signal to the enable end of the controller A through the unidirectional conducting diode J; at the same time, controller A replenishes the backup battery through the charging module B.

2. A vehicle power-off unlocking backup device according to claim 1, characterized in that: An indicator light G is provided to indicate the working status of the vehicle power-off unlocking device and whether maintenance is required.

3. A vehicle power-off unlocking backup device according to claim 1, characterized in that: Installed in single or multiple doors.

4. A vehicle power-off unlocking backup device according to claim 1, characterized in that: Activate or deactivate controller A via an external switch or the vehicle CAN bus.

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