Safety air bag electric control unit, vehicle door unlocking assembly and vehicle

Abstract

The utility model relates to a supplementary restraint system electric control unit, a car door unlocking assembly and a car, the supplementary restraint system electric control unit comprises a stand-by power supply, a controller and a motor control circuit, the stand-by power supply is respectively connected with a power supply end of the controller and a power supply input end of the motor control circuit so as to provide an input power supply; a first signal acquisition end of the controller is connected with the collision sensor, a second signal acquisition end of the controller is connected with a switch module of the door lock assembly, a first signal output end of the controller is connected with a signal input end of the motor control circuit, and a current output end of the motor control circuit is connected with a door lock motor of the door lock assembly. The emergency power supply in the safety air bag electric control unit is used for supplying power, then the motor control circuit is controlled to output the unlocking current to the door lock motor so as to unlock the door lock, the problem that an unlocking system cannot work due to power failure caused by automobile collision is solved, it is ensured that the automobile can be automatically unlocked after collision, and the safety of the automobile is improved. And the unlocking safety of the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of active automobile safety protection, in particular to an airbag electronic control unit, a door unlocking assembly and a vehicle. Background Art

[0002] Under the traditional electronic control unit (ECU) automobile architecture, the vehicle unlocking system includes the airbag electronic control unit, gateway, integrated controller (IBCM), and door lock motor. The airbag electronic control unit sends a collision signal to the (controller area network) CAN bus, and the gateway forwards it to the integrated controller (IBCM). After the integrated controller (IBCM) receives the signal, it drives the door lock motor to unlock by current. Under the automotive electronic and electrical architecture of the domain controller, the vehicle post-collision unlocking system is similar, consisting of the airbag electronic control unit, the central domain controller (CCU), the zone controller (ZCU) and the door lock motor. When a collision occurs, the airbag electronic control unit sends a collision signal to the (controller area network) CAN bus, and the central domain controller (CCU) forwards it to the zone controller (ZCU). After the zone controller (ZCU) receives the signal, it drives the door lock motor to unlock by current.

[0003] In the above solution, however, this technical solution cannot cope with the problem of power failure after a car collision. When a serious collision occurs in the car, causing the battery to fall off or the main power supply line of the front engine compartment to be open, the car can no longer normally supply power to the unlocking system controllers such as the integrated controller (IBCM) or the zone controller (ZCU) after the collision, resulting in power failure and the unlocking system cannot work. Utility Model Content

[0004] Based on this, it is necessary to provide an airbag electronic control unit, a door unlocking assembly and a vehicle to address the above-mentioned technical problems, so as to solve the problem that the existing technology cannot normally supply power to unlocking system controllers such as an integrated controller (IBCM) or a zone controller (ZCU), causing power outages and resulting in the unlocking system being unable to work.

[0005] In order to solve the above technical problems, the first aspect of an embodiment of the utility model provides an airbag electronic control unit, which includes a backup power supply, a controller and a motor control circuit. The backup power supply is respectively connected to the power supply end of the controller and the power input end of the motor control circuit, and the backup power supply provides input power for the controller and the motor control circuit respectively. The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

[0006] As one implementation manner, the motor control circuit includes an H-bridge circuit.

[0007] A second aspect of the embodiment of the utility model provides a vehicle door unlocking assembly, the vehicle door unlocking assembly includes a collision sensor, an airbag electronic control unit and a door lock assembly, the airbag electronic control unit includes a backup power supply, a controller and a motor control circuit, the door lock assembly includes a switch module, a door lock motor and an unlocking mechanism;

[0008] The backup power supply is connected to the power supply end of the controller and the power input end of the motor control circuit respectively, and the backup power supply provides input power to the controller and the motor control circuit respectively;

[0009] The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

[0010] As one implementation manner, the motor control circuit includes an H-bridge circuit.

[0011] As one embodiment, the door unlocking assembly also includes a gateway and an integrated controller, wherein the second signal output terminal of the controller is connected to the signal input terminal of the gateway, the signal output terminal of the gateway is connected to the signal input terminal of the integrated controller, and the current output terminal of the integrated controller is connected to the door lock motor of the door lock assembly.

[0012] As one embodiment, the door unlocking assembly further includes a central domain controller and a regional controller, wherein the third signal output terminal of the controller is connected to the signal input terminal of the central domain controller, the signal output terminal of the central domain controller is connected to the signal input terminal of the regional controller, and the current output terminal of the regional controller is connected to the door lock motor of the door lock assembly.

[0013] The third aspect of the utility model further provides a vehicle, the vehicle comprising a door unlocking assembly, the door unlocking assembly comprising a collision sensor, an airbag electronic control unit and a door lock assembly, the airbag electronic control unit comprising a backup power supply, a controller and a motor control circuit, the door lock assembly comprising a switch module, a door lock motor and an unlocking mechanism;

[0014] The backup power supply is connected to the power supply end of the controller and the power input end of the motor control circuit respectively, and the backup power supply provides input power to the controller and the motor control circuit respectively;

[0015] The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

[0016] As one implementation manner, the motor control circuit includes an H-bridge circuit.

[0017] As one embodiment, the door unlocking assembly also includes a gateway and an integrated controller, wherein the second signal output terminal of the controller is connected to the signal input terminal of the gateway, the signal output terminal of the gateway is connected to the signal input terminal of the integrated controller, and the current output terminal of the integrated controller is connected to the door lock motor of the door lock assembly.

[0018] As one embodiment, the door unlocking assembly further includes a central domain controller and a regional controller, wherein the third signal output terminal of the controller is connected to the signal input terminal of the central domain controller, the signal output terminal of the central domain controller is connected to the signal input terminal of the regional controller, and the current output terminal of the regional controller is connected to the door lock motor of the door lock assembly.

[0019] In summary, the utility model provides an airbag electronic control unit, a door unlocking assembly and a vehicle. The airbag electronic control unit includes a backup power supply, a controller and a motor control circuit. The backup power supply is respectively connected to the power supply end of the controller and the power input end of the motor control circuit. The backup power supply provides input power to the controller and the motor control circuit respectively. The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly. The present application utilizes the backup power supply in the airbag electronic control unit to provide input power to the controller and the motor control circuit respectively, and then controls the motor control circuit to output unlocking current to the door lock motor so as to unlock the door lock, which solves the problem that the unlocking system cannot work due to power outage after a serious collision of the car, ensures that the car can be automatically unlocked after a collision, and improves the unlocking safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural schematic diagram of an airbag electronic control unit provided by an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a vehicle door unlocking assembly provided by an embodiment of the utility model;

[0023] Figure 3 It is another structural schematic diagram of a vehicle door unlocking assembly provided by one embodiment of the utility model;

[0024] Figure 4 It is another structural schematic diagram of a vehicle door unlocking assembly provided by one embodiment of the utility model;

[0025] Figure 5 It is a structural schematic diagram of a vehicle provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Figure 1is a schematic structural diagram of an airbag electronic control unit according to an exemplary embodiment of the present application. Figure 1 As shown, the airbag electronic control unit includes a backup power supply, a controller and a motor control circuit. The backup power supply is respectively connected to the power supply end of the controller and the power input end of the motor control circuit. The backup power supply provides input power for the controller and the motor control circuit respectively. The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

[0030] In the embodiment of the present application, when a serious collision occurs in the car, causing the battery to fall off or the main power supply line of the front engine compartment to be open, the car can no longer normally supply power to the unlocking system controllers such as the integrated controller (IBCM) or the zone controller (ZCU) after the collision, resulting in a power outage and the unlocking system being unable to work. At this time, the backup power supply in the airbag electronic control unit has its own capacitor, so that it can work independently for a period of time after the power outage. Since the backup power supply is respectively connected to the controller and the motor control circuit, the backup power supply supplies power to the controller and the motor control circuit, thereby enabling the controller to maintain a working state in real time, and to perform real-time detection of whether the vehicle is currently in a collision, so as to improve the stability and reliability of the working state of the airbag electronic control unit provided in the embodiment of the present application. When the vehicle is powered off, the collision sensor collects an acceleration signal. Since the first signal acquisition end of the controller is connected to the collision sensor, the first signal acquisition end of the controller receives the acceleration signal fed back by the collision sensor, and determines whether the vehicle has collided based on the acceleration signal. If a collision occurs, the collision signal of the current collision is obtained. While the first signal acquisition end of the controller receives the collision signal, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly. The second signal acquisition end of the controller will receive the door lock status signal of the switch module in the door lock assembly. If the second signal acquisition end of the controller receives the door lock status signal indicating that the door lock is in a locked state, since the first signal output end of the controller is connected to the signal input end of the motor control circuit, the current output end of the motor control circuit is connected to the door lock state of the door lock assembly. The controller outputs an unlocking current to the door lock motor according to the current collision signal and the door lock status signal, so as to drive the door lock motor to drive the unlocking structure to unlock the door, thereby realizing controlling the door lock motor to drive the unlocking structure to unlock the door in the case of power failure. When the door is unlocked, the door lock status signal of the switch module will change from the locked state to the unlocked state, and will be fed back to the second signal acquisition end of the controller. The second signal acquisition end of the controller receives the door lock status signal of the unlocked state of the switch module. Since the output end of the controller is connected to the input end of the motor control circuit, the controller will control the bridge switch to let the motor control circuit (H-bridge circuit) stop outputting the unlocking current to avoid the motor idling, thereby ensuring that the vehicle is automatically unlocked after a collision and no longer works after unlocking.

[0031] In the embodiment of the present application, a corresponding collision sensor is provided in the vehicle to collect acceleration signals. When the controller (MCU) receives the acceleration signal from the collision sensor, it determines that a collision occurs at this time, and then obtains the collision signal. By providing a voltage sensor in the vehicle to collect a low-voltage power supply signal, it is possible to determine whether the vehicle is normally powered based on the low-voltage power supply signal. If the low-voltage power supply signal is less than a preset low-voltage power supply threshold, the vehicle cannot be normally powered, and then the airbag electronic control unit is powered by its own capacitor to perform door unlocking. If the low-voltage power supply signal is greater than the preset low-voltage power supply threshold, the vehicle is normally powered.

[0032] It should be noted that this application determines whether the vehicle is powered normally, and different measures can be adopted according to the actual situation, and this application does not make any limitation on this.

[0033] In the embodiment of the present application, the backup power supply in the airbag electronic control unit is generally equipped with a large-capacity capacitor, which can ensure that in the event of an external power supply failure, it can continue to work for about 500ms relying on the power stored in its own internal storage, and is used to send a collision signal and output an unlocking current, which can completely cover the time required for door unlocking after a collision, and completely avoid door unlocking failure caused by low-voltage power failure. In addition, since a vehicle generally has four doors, the controller (MCU) needs to have at least four output IO ports and four input switch quantities, and the rated voltage of the backup power supply needs to be greater than or equal to the locked-rotor voltage of the door lock motor, and the rated power needs to be greater than or equal to the power of the four door lock motors, that is, the requirements for the backup power supply are:

[0034] U2 ≥ U1

[0035] P≥4*I*U1

[0036] Among them, U1 is the locked-rotor voltage of the door lock motor, U2 is the rated voltage of the backup power supply, P is the rated power of the backup power supply, and I is the locked-rotor current of the door lock motor.

[0037] It should be noted that the rated voltage and rated power of the backup power supply here can be understood as the thresholds corresponding to the components maintaining normal working conditions. For example, assuming that the stall voltage of the door lock motor is 20V and the rated voltage of the backup power supply is 25V, then when the motor is blocked and cannot rotate normally, the rated voltage of the backup power supply of 25V is greater than the stall voltage of the door lock motor of 20V, and the motor will be considered to be in an abnormal state, so corresponding protection measures will be taken. For example, if the rated power of the backup power supply is 40W, then during normal operation, the system will maintain the power within the range of 40W and ensure that the power does not exceed 40W to ensure that the backup power supply can reliably provide power to the system, thereby solving the problem that the unlocking system cannot work due to power failure of the vehicle after a collision, ensuring that the car can be automatically unlocked after a collision, and effectively protecting the safety of passengers.

[0038] As an embodiment, the motor control circuit includes an H-bridge circuit.

[0039] In the embodiment of the present application, the motor control circuit is an H-bridge circuit, which is a typical DC motor control circuit. In the present application, the first signal output terminal of the controller is connected to the signal input terminal of the motor control circuit, and the current output terminal of the motor control circuit is connected to the door lock motor of the door lock assembly. The H-bridge circuit is controlled by the controller (MCU) so that the H-bridge circuit quickly outputs the unlocking current, thereby driving the door lock motor to rotate and driving the unlocking structure to unlock. The present application controls the H-bridge circuit through the controller MCU, so that the H-bridge circuit outputs the unlocking current with the advantages of high efficiency, wide speed adjustment range and wide applicability. It should be noted that the motor control circuit of the present application can be set according to actual conditions, such as an LC circuit, and the present application does not make any limitation on this.

[0040] In summary, the utility model provides an airbag electronic control unit, a door unlocking assembly and a vehicle. The airbag electronic control unit includes a backup power supply, a controller and a motor control circuit. The backup power supply is respectively connected to the power supply end of the controller and the power input end of the motor control circuit. The backup power supply provides input power to the controller and the motor control circuit respectively. The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly. The present application utilizes the backup power supply in the airbag electronic control unit to provide input power to the controller and the motor control circuit respectively, and then controls the motor control circuit to output unlocking current to the door lock motor so as to unlock the door lock, which solves the problem that the unlocking system cannot work due to power outage after a serious collision of the car, ensures that the car can be automatically unlocked after a collision, and improves the unlocking safety of the vehicle.

[0041] Figure 2 is a structural schematic diagram of a vehicle door unlocking assembly according to an exemplary embodiment of the present application. Figure 2 As shown, the door unlocking assembly includes a collision sensor, an airbag electronic control unit and a door lock assembly. The airbag electronic control unit includes a backup power supply, a controller and a motor control circuit. The door lock assembly includes a switch module, a door lock motor and an unlocking mechanism.

[0042] The backup power supply is connected to the power supply end of the controller and the power input end of the motor control circuit respectively, and the backup power supply provides input power to the controller and the motor control circuit respectively;

[0043] The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

[0044] In an embodiment of the present application, the door unlocking assembly includes a collision sensor, a door lock assembly and an airbag electronic control unit. The airbag electronic control unit includes a backup power supply, a controller and a motor control circuit. The door lock assembly includes a door lock motor, an unlocking mechanism and a switch module. The backup power supply is respectively connected to the power supply end of the controller and the power input end of the motor control circuit. The backup power supply provides input power to the controller and the motor control circuit respectively. Since the airbag electronic control unit has its own capacitor and has the characteristic of being able to work independently for a period of time after power failure, the airbag electronic control unit can continue to work for a period of time after power failure after a vehicle collision when powered by a backup battery. When the vehicle is powered off, the collision sensor collects the acceleration signal. Since the first signal acquisition end of the controller is connected to the collision sensor, the first signal acquisition end of the controller receives the acceleration signal fed back by the collision sensor, and determines whether the vehicle has collided based on the acceleration signal. If a collision occurs, the collision signal of the current collision is obtained. While the first signal acquisition end of the controller receives the collision signal, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly. The second signal acquisition end of the controller will receive the door lock status signal of the switch module in the door lock assembly. If the second signal acquisition end of the controller receives the door lock status signal indicating that the door lock is in a locked state, since the first signal acquisition end of the controller The signal output end is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly. The controller outputs the unlocking current to the door lock motor according to the current collision signal and the door lock status signal, so as to drive the door lock motor to drive the unlocking structure to unlock the door lock, thereby realizing controlling the door lock motor to drive the unlocking structure to unlock the door in the case of power failure. When the door is unlocked, the door lock status signal of the switch module will change from the locked state to the unlocked state, and will be fed back to the second signal acquisition end of the controller. The second signal acquisition end of the controller receives the door lock status signal of the unlocked state of the switch module. Since the output end of the controller is connected to the input end of the motor control circuit, the controller will control the bridge switch to let the motor control circuit (H-bridge circuit) stop outputting the unlocking current to avoid the motor idling, thereby ensuring that the vehicle is automatically unlocked after a collision and no longer works after unlocking.

[0045] In the embodiment of the present application, due to the signal interaction relationship between the collision sensor, the airbag electronic control unit and the door lock assembly, the controller (MCU) inside the airbag electronic control unit can control the motor control circuit (H-bridge circuit), thereby controlling the door lock motor through the motor control circuit, and the switch module is used to interact the switch signal with the airbag electronic control unit to complete information feedback. The door unlocking assembly in the embodiment of the utility model can realize wireless RF transmission of the collision signal, thereby avoiding power failure after a car collision, and the problem that the unlocking system cannot work due to power failure of controllers such as the integrated controller IBCM or the zone controller ZCU, thereby improving the unlocking efficiency of the vehicle.

[0046] In an actual application scenario of the present embodiment, such as an ordinary small family car, which generally has four doors, in this case, in order to improve the reliability of unlocking, the door unlocking assembly provided by the present embodiment can be used to control the state of each door relatively independently. To achieve this control process, it is necessary to set a corresponding number of door lock motors in the door unlocking assembly corresponding to the number of doors, so as to achieve accurate control of each door of the current vehicle through the door unlocking system of the present embodiment, so as to avoid the situation that a door lock cannot be unlocked due to deformation or damage of a certain door lock due to collision during the process of unlocking the door lock driven by a single door lock motor, and other doors can also be unlocked by other door locks, so that the unlocking process of each door of the current vehicle is relatively independent, thereby improving the survival rate of the driver or passengers when the vehicle collides. Of course, the present embodiment here only exemplifies an actual application scenario to illustrate the number of door lock motors, and does not mean that the present application is limited to this. The number of door lock motors can be adjusted according to the actual number of doors designed for the vehicle, and can be increased or decreased accordingly, and the present application does not limit this.

[0047] In one embodiment, the motor control circuit includes an H-bridge circuit.

[0048] In the embodiment of the present application, the motor control circuit is an H-bridge circuit, which is a typical DC motor control circuit. In the present application, the first signal output terminal of the controller is connected to the signal input terminal of the motor control circuit, and the current output terminal of the motor control circuit is connected to the door lock motor of the door lock assembly. The H-bridge circuit is controlled by the controller (MCU) so that the H-bridge circuit quickly outputs the unlocking current, thereby driving the door lock motor to rotate and driving the unlocking structure to unlock. The present application controls the H-bridge circuit through the controller MCU, so that the H-bridge circuit outputs the unlocking current with the advantages of high efficiency, wide speed adjustment range and wide applicability. It should be noted that the motor control circuit of the present application can be set according to actual conditions, such as an LC circuit, and the present application does not make any limitation on this.

[0049] In one embodiment, the vehicle door unlocking assembly also includes a gateway and an integrated controller, wherein the second signal output terminal of the controller is connected to the signal input terminal of the gateway, the signal output terminal of the gateway is connected to the signal input terminal of the integrated controller, and the current output terminal of the integrated controller is connected to the door lock motor of the door lock assembly.

[0050] In the present application embodiment, Figure 3 As shown, the second signal output end of the controller is connected to the signal input end of the gateway, the signal output end of the gateway is connected to the signal input end of the integrated controller, and the current output end of the integrated controller is connected to the door lock motor of the door lock assembly. When the car collides, if the controller (MCU) receives the collision signal and the integrated controller (IBCM) is not powered off, the vehicle can be unlocked directly through the integrated controller (IBCM), that is, the airbag electronic control unit sends the collision signal to the CAN line to obtain the collision bus signal, and the gateway forwards the collision bus signal to the integrated controller (IBCM). After receiving the collision bus signal, the integrated controller (IBCM) sends an unlocking current, thereby driving the unlocking motor to unlock the door; if the integrated controller (IBCM) is powered off, the airbag electronic control unit is used. The backup power supply in the airbag is used to power the motor control circuit, and the controller (MCU) in the airbag electronic control unit controls the motor control circuit to output the unlocking current to the door lock motor, thereby driving the door lock motor to drive the unlocking structure to unlock the door lock and realize door unlocking. When the door is unlocked, the door lock state signal of the switch module will change from the locked state to the unlocked state, and will be fed back to the controller (MCU). When the controller (MCU) receives the door lock state signal of the unlocked state of the switch module, it will control the bridge switch to make the motor control circuit (H-bridge circuit) stop outputting the unlocking current to avoid the motor idling, thereby ensuring that the vehicle is automatically unlocked after a collision and no longer works after unlocking, realizing that the door unlocking path remains in parallel, providing a redundant design for unlocking the car after a collision, which not only solves the problem of power failure and inability to unlock after a collision, but also improves the stability of the system.

[0051] In one embodiment, the vehicle door unlocking assembly also includes a central domain controller and a regional controller, wherein the third signal output terminal of the controller is connected to the signal input terminal of the central domain controller, the signal output terminal of the central domain controller is connected to the signal input terminal of the regional controller, and the current output terminal of the regional controller is connected to the door lock motor of the door lock assembly.

[0052] In the present application embodiment, Figure 4As shown, the third signal output terminal of the controller is connected to the signal input terminal of the central domain controller, the signal output terminal of the central domain controller is connected to the signal input terminal of the zone controller, and the current output terminal of the zone controller is connected to the door lock motor of the door lock assembly. When the car collides, if the controller (MCU) receives the collision signal and the zone controller (ZCU) is not powered off, the vehicle can be unlocked directly through the zone controller (ZCU). That is, the airbag electronic control unit sends the collision signal to the CAN line to obtain the collision bus signal, and the central domain controller (CCU) forwards the collision bus signal to the zone controller (ZCU). After receiving the collision bus signal, the zone controller (ZCU) sends an unlocking current, thereby driving the unlocking motor to unlock the door; if the zone controller (ZCU) is powered off, the backup power supply in the airbag electronic control unit is used to supply power, and the controller (MCU) in the airbag electronic control unit controls the motor control circuit to output the unlocking current to the door lock motor, thereby driving the door lock motor to drive the unlocking structure to unlock the door. When the door is unlocked, the door lock status signal of the switch module will change from locked state to unlocked state and will be fed back to the controller (MCU). When the controller (MCU) receives the door lock status signal of the unlocked state from the switch module, it will control the bridge switch to make the motor control circuit (H-bridge circuit) stop outputting the unlocking current to avoid the motor idling, thereby ensuring that the vehicle is automatically unlocked after a collision and no longer works after unlocking, and realizing that the door unlocking path remains in parallel, providing a redundant design for unlocking the car after a collision, which not only solves the problem of power failure and inability to unlock after a collision, but also improves the stability of the system.

[0053] In this embodiment, the collision sensor includes a front collision sensor and a side collision sensor. The front collision sensor collects the front acceleration signal of the vehicle when it has a frontal collision, and the side collision sensor is used to collect the side acceleration signal of the vehicle when it has a side collision. By obtaining acceleration signals in multiple collision directions, the stability and reliability of the door unlocking assembly are further improved, ensuring that the collision information can be stably obtained when the vehicle collides in different directions. In addition, the present application can set multiple collision sensors according to actual needs, such as a first collision sensor, a second collision sensor, a third collision sensor, etc., and the present application does not make any limitation on this.

[0054] It should be noted that the collision sensor is generally divided into a B-pillar side collision sensor and a front collision sensor, with a measuring range of 240g. The specific design can be based on actual needs, and this application does not impose any limitation on this.

[0055] Figure 5 FIG. 1 is a schematic block diagram of a vehicle according to an exemplary embodiment of the present application, as shown in FIG. Figure 5As shown, the vehicle includes the door unlocking assembly in the above embodiment, the door unlocking assembly includes a collision sensor, an airbag electronic control unit and a door lock assembly, the airbag electronic control unit includes a backup power supply, a controller and a motor control circuit, and the door lock assembly includes a switch module, a door lock motor and an unlocking mechanism;

[0056] The backup power supply is connected to the power supply end of the controller and the power input end of the motor control circuit respectively, and the backup power supply provides input power to the controller and the motor control circuit respectively;

[0057] The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

[0058] In one embodiment, the motor control circuit includes an H-bridge circuit.

[0059] In one embodiment, the vehicle door unlocking assembly also includes a gateway and an integrated controller, wherein the second signal output terminal of the controller is connected to the signal input terminal of the gateway, the signal output terminal of the gateway is connected to the signal input terminal of the integrated controller, and the current output terminal of the integrated controller is connected to the door lock motor of the door lock assembly.

[0060] In one embodiment, the door unlocking assembly further includes a central domain controller and a regional controller, wherein the third signal output terminal of the controller is connected to the signal input terminal of the central domain controller, the signal output terminal of the central domain controller is connected to the signal input terminal of the regional controller, and the current output terminal of the regional controller is connected to the door lock motor of the door lock assembly.

[0061] It should be noted that the implementation method of this vehicle embodiment is the same as the implementation method of the above-mentioned door unlocking assembly embodiment, and the vehicle in this embodiment has the same technical effect as the above-mentioned door unlocking assembly, which will not be repeated here.

[0062] In summary, the vehicle proposed in this application is judged by the airbag electronic control unit in the door unlocking assembly that the acceleration reaches the threshold value. When the vehicle should be unlocked, the airbag electronic control unit receives the switch signal of the door lock mechanism and judges whether the door lock is in a locked or unlocked state at this time. If it is in a locked state, it sends an unlocking current to the door unlocking motor to allow the door unlocking motor to unlock. Since the airbag electronic control unit has a backup power supply, the door can still be unlocked in the event of a power outage due to a vehicle collision, which solves the problem of being unable to unlock due to power outage after a collision, ensures that the car can be automatically unlocked after a collision, and effectively protects the safety of passengers.

[0063] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed. And each embodiment in this article is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0064] The embodiments described above are merely technical solutions of the present invention, rather than limitations thereof. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An airbag electronic control unit, characterized in that: The airbag electronic control unit includes a backup power supply, a controller and a motor control circuit. The backup power supply is respectively connected to the power supply end of the controller and the power input end of the motor control circuit. The backup power supply provides input power for the controller and the motor control circuit respectively. The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

2. The airbag electronic control unit according to claim 1, characterized in that: The motor control circuit includes an H-bridge circuit.

3. A vehicle door unlocking assembly, characterized in that: The door unlocking assembly includes a collision sensor, an airbag electronic control unit and a door lock assembly, wherein the airbag electronic control unit includes a backup power supply, a controller and a motor control circuit, and the door lock assembly includes a switch module, a door lock motor and an unlocking mechanism; The backup power supply is connected to the power supply end of the controller and the power input end of the motor control circuit respectively, and the backup power supply provides input power to the controller and the motor control circuit respectively; The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

4. The vehicle door unlocking assembly according to claim 3, characterized in that: The motor control circuit includes an H-bridge circuit.

5. The vehicle door unlocking assembly according to claim 3, characterized in that: The vehicle door unlocking assembly also includes a gateway and an integrated controller, wherein the second signal output end of the controller is connected to the signal input end of the gateway, the signal output end of the gateway is connected to the signal input end of the integrated controller, and the current output end of the integrated controller is connected to the door lock motor of the door lock assembly.

6. The vehicle door unlocking assembly according to claim 3, characterized in that: The door unlocking assembly also includes a central domain controller and a regional controller, wherein the third signal output end of the controller is connected to the signal input end of the central domain controller, the signal output end of the central domain controller is connected to the signal input end of the regional controller, and the current output end of the regional controller is connected to the door lock motor of the door lock assembly.

7. A vehicle, characterized in that: The vehicle includes a door unlocking assembly, which includes a collision sensor, an airbag electronic control unit and a door lock assembly, the airbag electronic control unit includes a backup power supply, a controller and a motor control circuit, and the door lock assembly includes a switch module, a door lock motor and an unlocking mechanism; The backup power supply is connected to the power supply end of the controller and the power input end of the motor control circuit respectively, and the backup power supply provides input power to the controller and the motor control circuit respectively; The first signal acquisition end of the controller is connected to the collision sensor, the second signal acquisition end of the controller is connected to the switch module of the door lock assembly, the first signal output end of the controller is connected to the signal input end of the motor control circuit, and the current output end of the motor control circuit is connected to the door lock motor of the door lock assembly.

8. The vehicle according to claim 7, characterized in that The motor control circuit includes an H-bridge circuit.

9. The vehicle according to claim 7, characterized in that The vehicle door unlocking assembly also includes a gateway and an integrated controller, wherein the second signal output end of the controller is connected to the signal input end of the gateway, the signal output end of the gateway is connected to the signal input end of the integrated controller, and the current output end of the integrated controller is connected to the door lock motor of the door lock assembly.

10. The vehicle according to claim 7, characterized in that The door unlocking assembly also includes a central domain controller and a regional controller, wherein the third signal output end of the controller is connected to the signal input end of the central domain controller, the signal output end of the central domain controller is connected to the signal input end of the regional controller, and the current output end of the regional controller is connected to the door lock motor of the door lock assembly.

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