Collision unlock controller for a vehicle

Abstract

The application discloses a collision unlocking controller and a vehicle. The collision unlocking controller is applied to the vehicle. The vehicle further comprises a door lock, a motor and a region controller. The motor is used to drive the door lock to be unlocked or locked. The collision unlocking controller comprises a control circuit and a drive channel selection circuit. The collision unlocking controller is configured to: in response to not receiving a collision signal of the vehicle, the control circuit outputs a first control signal, and the drive channel selection circuit is controlled by the first control signal to turn on a drive loop of the region controller for driving the motor based on a drive signal output by the region controller; and in response to receiving the collision signal, the control circuit outputs a second control signal, and the drive channel selection circuit is controlled by the second control signal to turn off the drive loop. In this way, the collision unlocking controller and the region controller cannot influence each other when the vehicle collides, and the safety hazard is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle collision protection technology, and in particular to a collision unlocking controller and a vehicle. Background Technology

[0002] With the continuous improvement of automotive active and passive safety systems, the emergency unlocking function of door locks in vehicle collision scenarios has become a critical safety requirement. When a vehicle is involved in a collision, the door lock motor must be quickly activated to unlock the central locking and child locks, ensuring the safe evacuation of occupants. In related technologies, the door lock motor is connected to two control units: one is the vehicle body area controller responsible for door lock control under normal driving conditions, and the other is the collision unlocking controller that responds to collision signals and performs emergency unlocking in the event of a collision.

[0003] The hardware architecture of two control units sharing the same door lock motor has an inherent flaw: the two controllers output drive signals independently, which easily leads to drive timing conflicts. If the door lock motor is driven forward by the output signal of the body area controller, and the collision unlock controller simultaneously outputs a reverse drive signal, it will directly cause a power supply short circuit to ground fault. At the same time, when a collision occurs, the drive signal of the body area controller will cause electrical interference to the emergency unlock command of the collision unlock controller, which may cause the collision unlock command to fail and the door lock to fail to respond to the unlocking action in time. Both of these types of faults will hinder the evacuation of passengers after a collision, posing a significant driving safety hazard. Summary of the Invention

[0004] This application provides a collision unlocking controller and a vehicle, which can ensure that the collision unlocking controller and the area controller do not interfere with each other when a vehicle collision occurs, thereby reducing safety hazards.

[0005] In a first aspect, embodiments of this application provide a collision unlocking controller applied to a vehicle. The vehicle further includes a door lock, a motor, and a zone controller. The motor is electrically connected to the zone controller and the collision unlocking controller, and is used to drive the door lock to unlock or lock. The collision unlocking controller includes a control circuit and a drive channel selection circuit, the drive channel selection circuit being electrically connected to the zone controller, the control circuit, and the motor, respectively. The collision unlocking controller is configured to: in response to not receiving a collision signal from the vehicle, the control circuit outputs a first control signal, and the drive channel selection circuit is controlled by the first control signal to conduct the drive circuit of the zone controller driving the motor, so as to drive the motor based on the drive signal output by the zone controller; in response to receiving a collision signal, the control circuit outputs a second control signal, and the drive channel selection circuit is controlled by the second control signal to turn off the drive circuit.

[0006] In one or more embodiments, a first end of the motor is electrically connected to a first node via a region controller and a collision unlocking controller, and a second end of the motor is electrically connected to a second node via a region controller and a collision unlocking controller. The drive signal includes a first sub-drive signal and a second sub-drive signal, wherein the first sub-drive signal and the second sub-drive signal are different signals. The drive channel selection circuit includes a first switch circuit and a second switch circuit. The first switch circuit is electrically connected to the region controller, the control circuit, and the first node, respectively, and the second switch circuit is electrically connected to the region controller, the control circuit, and the second node, respectively. The drive channel selection circuit is configured to: respond to a first control signal, the first switch circuit and the second switch circuit are in a conducting state to conduct the drive loop, so that the first sub-drive signal acts on the first node and the second sub-drive signal acts on the second node, thereby driving the motor based on the drive signal; respond to a second control signal, the first switch circuit and the second switch circuit are in a turning-off state to turn off the drive loop.

[0007] In one or more embodiments, the first switching circuit includes a first switching element and a second switching element; both the first and second switching elements are electrically connected to the area controller and the first node, respectively; the first switching circuit is configured to: in response to a first control signal and a first sub-drive signal being at a first level signal, the first switching element is turned on and the second switching element is turned off; in response to a first control signal and a first sub-drive signal being at a second level signal, the first switching element is turned off and the second switching element is turned on; in response to a second control signal, both the first and second switching elements are turned off; wherein, the on state of one of the first and second switching elements corresponds to the first switching circuit being in an on state, and the off state of both the first and second switching elements corresponds to the first switching circuit being in an off state.

[0008] In one or more embodiments, the first switching circuit further includes a third switching element and a fourth switching element; the fourth switching element is electrically connected to the control circuit, the third switching element, the second switching element, and the first power supply, respectively; the third switching element is electrically connected to the first switching element; the first switching circuit is configured such that: when the fourth switching element is turned off in response to a first control signal, the third switching element is turned on in response to the voltage of the first power supply; the first switching element is turned on in response to a first sub-drive signal being a first level signal or turned off in response to a second level signal; the second switching element is turned off in response to a first sub-drive signal being a first level signal or turned on in response to a second level signal; when the fourth switching element is turned on in response to a second control signal, the third switching element is turned off in response to the fourth switching element being turned on; the first switching element is turned off in response to the third switching element being turned off; and the second switching element is turned off in response to the fourth switching element being turned on.

[0009] In one or more embodiments, the first switching element is a PMOS transistor, and the second, third, and fourth switching elements are NMOS transistors; the gate of the fourth switching element is electrically connected to a control circuit, the source of the fourth switching element and the source of the third switching element are both grounded, the drain of the fourth switching element is electrically connected to the gate of the third switching element, the gate of the second switching element, and a first power supply, the drain of the third switching element is electrically connected to the gate of the first switching element, the source of the first switching element and the drain of the second switching element are both electrically connected to a region controller, and the drain of the first switching element and the source of the second switching element are both electrically connected to a first node.

[0010] In one or more embodiments, the first switching circuit further includes a first resistor and a second resistor; the first resistor is electrically connected between the gate and source of the first switching element, and the second resistor is electrically connected between the first power supply and the drain of the fourth switching element.

[0011] In one or more embodiments, the second switching circuit includes a fifth switching element and a sixth switching element; both the fifth and sixth switching elements are electrically connected to the area controller and the second node, respectively; the second switching circuit is configured to: in response to a first control signal and a second sub-drive signal being at a first level signal, the fifth switching element is turned on and the sixth switching element is turned off; in response to a first control signal and a second sub-drive signal being at a second level signal, the fifth switching element is turned off and the sixth switching element is turned on; in response to a second control signal, both the fifth and sixth switching elements are turned off; wherein, the turning on of one of the fifth and sixth switching elements corresponds to the second switching circuit being in a conducting state, and the turning off of both the fifth and sixth switching elements corresponds to the second switching circuit being in a turning-off state.

[0012] In one or more embodiments, the second switching circuit further includes a seventh switching element and an eighth switching element; the eighth switching element is electrically connected to the control circuit, the seventh switching element, the sixth switching element, and the first power supply, respectively, and the seventh switching element is electrically connected to the fifth switching element; the second switching circuit is configured such that: when the eighth switching element is turned off in response to a first control signal, the seventh switching element is turned on in response to the voltage of the first power supply, the fifth switching element is turned on or turned off in response to the second sub-drive signal being a first level signal, and the sixth switching element is turned off or turned on in response to the second sub-drive signal being a first level signal; when the eighth switching element is turned on in response to the second control signal, the seventh switching element is turned off in response to the eighth switching element being turned on, the fifth switching element is turned off in response to the seventh switching element being turned off, and the sixth switching element is turned off in response to the eighth switching element being turned on.

[0013] In one or more embodiments, the fifth switching element is a PMOS transistor, and the sixth, seventh, and eighth switching elements are NMOS transistors; the gate of the eighth switching element is electrically connected to a control circuit, the source of the eighth switching element and the source of the seventh switching element are both grounded, the drain of the eighth switching element is electrically connected to the gate of the seventh switching element, the gate of the sixth switching element and a first power supply, the drain of the seventh switching element is electrically connected to the gate of the fifth switching element, the source of the fifth switching element and the drain of the sixth switching element are both electrically connected to a region controller, and the drain of the fifth switching element and the source of the sixth switching element are both electrically connected to a second node.

[0014] In one or more embodiments, the second switching circuit further includes a third resistor and a fourth resistor; the third resistor is electrically connected between the gate and source of the fifth switching element, and the fourth resistor is electrically connected between the first power supply and the drain of the eighth switching element.

[0015] Secondly, embodiments of this application provide a vehicle, including a door lock, a motor, a zone controller, and a collision unlocking controller as described in the first aspect; the motor is electrically connected to the zone controller and the collision unlocking controller, and the motor is controlled by the zone controller or the collision unlocking controller to drive the door lock to unlock or lock, wherein the zone controller is used to control the motor when the vehicle does not collide, and the collision unlocking controller is used to control the motor when the vehicle collides.

[0016] The beneficial effects of this application are as follows: This application discloses a collision unlocking controller for vehicles. The vehicle is equipped with a door lock, a motor, and a zone controller for implementing conventional door lock control. The motor is electrically connected to both the zone controller and the collision unlocking controller, and can unlock or lock the door lock by rotating it. The collision unlocking controller includes a control circuit and a drive channel selection circuit, which is electrically connected to the zone controller, the control circuit, and the motor. When no vehicle collision signal is received, the control circuit outputs a first control signal, causing the drive channel selection circuit to connect the drive circuit from the zone controller to the motor. At this time, the motor responds normally to the drive command of the zone controller and performs conventional locking or unlocking operations. When a collision signal is triggered, the control circuit immediately outputs a second control signal, forcing the drive channel selection circuit to shut off the drive circuit, thereby cutting off the control path of the zone controller to the motor at the physical layer. Through this mechanism, the drive signal of the area controller is completely isolated after a collision and cannot be transmitted to the motor. This not only eliminates the potential short circuit to ground fault that may occur when the area controller outputs its own emergency drive signal at the same time, but also eliminates the electrical crosstalk path between the area controller's signal and the emergency unlocking command. This ensures that the collision unlocking controller can independently and reliably drive the motor to perform the unlocking action, thereby effectively reducing the driving safety hazards caused by obstructed evacuation of passengers. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are not intended to limit the embodiments, and elements having the same reference numerals in the drawings are designated as similar elements.

[0018] Figure 1 This is an illustration of the vehicle provided in the embodiments of this application. Figure 1 ; Figure 2 This is an illustration of the vehicle provided in the embodiments of this application. Figure 2 ; Figure 3 This is an illustration of the vehicle provided in the embodiments of this application. Figure 3 ; Figure 4 This is an illustration of the vehicle provided in the embodiments of this application. Figure 4 ; Figure 5 This is an illustration of the vehicle provided in the embodiments of this application. Figure 5 . Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described clearly and in detail below with reference to the accompanying drawings. Obviously, the embodiments in this application are only some embodiments, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0020] It should be noted that when an element is described as "connected" to another element, it can be directly connected to the other element, or there can be one or more intermediate elements between them.

[0021] Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0022] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the vehicle's components provided in an embodiment of this application. Vehicle 1000 refers to a motor vehicle equipped with automatic door lock 300 control function. Figure 1 As shown, vehicle 1000 includes collision unlock controller 100, area controller 200, door lock 300 and motor M1.

[0023] The collision unlock controller 100 is an electronic control unit specifically designed to perform emergency unlocking functions in the event of a collision involving the vehicle 1000. Under normal driving conditions, the collision unlock controller 100 is in standby mode. Upon receiving a collision signal from a collision sensor (such as an airbag controller), it is activated and takes over control of the motor M1. The function of the collision unlock controller 100 is to take over or intervene in control of the motor M1 upon receiving a collision signal, ensuring that the door locks 300 can be forcibly unlocked in an emergency, thus guaranteeing the evacuation safety of the occupants.

[0024] The area controller 200 refers to the control unit in the vehicle 1000 responsible for managing the vehicle's electronic functions under normal driving conditions. Specifically, in a non-collision state (i.e., when the vehicle is not in a collision), the area controller 200 is responsible for outputting drive signals according to user instructions (such as remote unlocking, in-vehicle buttons, etc.) to control the motor M1 to perform the normal unlocking or locking actions of the door lock 300.

[0025] The door lock 300 refers to the mechanical actuator installed on the door of the vehicle 1000 for physically locking or unlocking the door. The state (locked or unlocked) of the door lock 300 is directly driven by the operation of the motor M1.

[0026] Motor M1 is electrically connected to both the area controller 200 and the collision unlocking controller 100. Motor M1 is controlled by either the area controller 200 or the collision unlocking controller 100 to drive the door lock 300 to unlock or lock. The area controller 200 controls motor M1 when no collision occurs in the vehicle 1000, while the collision unlocking controller 100 controls motor M1 when a collision occurs in the vehicle 1000. Specifically, motor M1 is the power actuator of the door lock 300, typically employing a DC motor actuator. Motor M1 changes its rotation direction by altering the polarity of its input power supply, thereby driving the door lock 300 to perform unlocking or locking actions. In the vehicle 1000, motor M1 is electrically connected to both the area controller 200 and the collision unlocking controller 100, forming a dual control path: under normal operating conditions, motor M1 is controlled by the drive signal output by the area controller 200; under collision conditions, motor M1 is controlled by the drive signal output by the collision unlocking controller 100 to achieve an emergency unlocking function.

[0027] The collision unlocking controller 100 includes a control circuit 110 and a drive channel selection circuit 120. The drive channel selection circuit 120 is electrically connected to the area controller 200, the control circuit 110, and the motor M1, respectively.

[0028] The collision unlock controller 100 is configured such that: in response to not receiving a collision signal from the vehicle 1000, the control circuit 110 outputs a first control signal, and the drive channel selection circuit 120 is controlled by the first control signal to turn on the drive circuit of the area controller 200 drive motor M1 to drive motor M1 based on the drive signal output by the area controller 200; in response to receiving a collision signal, the control circuit 110 outputs a second control signal, and the drive channel selection circuit 120 is controlled by the second control signal to turn off the drive circuit.

[0029] The collision signal is usually sent by the airbag controller (ACU) or a dedicated collision sensor via hardwire or vehicle network (such as CAN, LIN), indicating that the vehicle has experienced a collision event sufficient to trigger the safety restraint system.

[0030] Under normal operating conditions where no collision signal is received, control circuit 110 outputs a first control signal (e.g., a level signal). This first control signal is sent to the control terminal of drive channel selection circuit 120. The input terminal of drive channel selection circuit 120 is connected to the drive output port of area controller 200, and the output terminal is connected to the power supply terminal of motor M1. Controlled by the first control signal, drive channel selection circuit 120 conducts the drive circuit, that is, establishes a low-impedance electrical connection between area controller 200 and motor M1, so that the positive or negative drive signal (used for locking or unlocking commands) output by area controller 200 can be transmitted to motor M1 without obstruction. Motor M1 responds to the normal body control commands of area controller 200 accordingly, and performs door locking or unlocking actions.

[0031] In the event of a collision upon receiving a collision signal: the control circuit 110 immediately cancels the first control signal and outputs a second control signal (e.g., a signal with a different level than the first control signal). This second control signal acts on the drive channel selection circuit 120, causing it to shut down the drive circuit, i.e., disconnecting the electrical connection between the area controller 200 and the motor M1, physically cutting off the drive circuit. At this time, regardless of the drive level output by the area controller 200, it cannot be transmitted to the motor M1, thus completely isolating the drive output of the area controller 200 at the hardware level.

[0032] Through the above configuration, the collision unlock controller 100 achieves dual safety objectives: First, at the moment of a collision, by forcibly cutting off the drive path of the area controller 200, it fundamentally prevents the area controller 200 and the collision unlock controller 100 from simultaneously outputting signals of opposite polarity, thus eliminating the occurrence of power supply short circuit faults; Second, since the output terminal of the area controller 200 is isolated by the drive channel selection circuit 120, any electrical noise, surges, or residual drive voltage generated by it cannot be coupled to the motor M1 terminal, thereby preventing electrical crosstalk to the emergency drive command of the collision unlock controller 100 itself. This ensures that the collision unlock controller 100 can independently and cleanly apply the unlock drive signal to the motor M1, guaranteeing the reliable execution of the emergency unlock action, thereby effectively reducing the driving safety hazards caused by obstructed evacuation of passengers.

[0033] In some embodiments, such as Figure 2 As shown, the first end of motor M1 is electrically connected to the area controller 200 and the collision unlock controller 100 at the first node P1, and the second end of motor M1 is electrically connected to the area controller 200 and the collision unlock controller 100 at the second node P2.

[0034] The drive signal includes a first sub-drive signal and a second sub-drive signal, which are different signals. For example, the first sub-drive signal is a high-level signal and the second sub-drive signal is a low-level signal, or vice versa. This signal difference creates the necessary potential difference across the two ends of the motor M1, thereby forming a drive current loop and precisely controlling the motor M1 to perform forward or reverse rotation.

[0035] The drive channel selection circuit 120 includes a first switch circuit 121 and a second switch circuit 122. The first switch circuit 121 is electrically connected to the area controller 200, the control circuit 110 and the first node P1, respectively. The second switch circuit 122 is electrically connected to the area controller 200, the control circuit 110 and the second node P2, respectively.

[0036] The drive channel selection circuit 120 is configured such that, in response to a first control signal, the first switch circuit 121 and the second switch circuit 122 are in an on state to conduct the drive circuit, so that the first sub-drive signal acts on the first node P1 and the second sub-drive signal acts on the second node P2, thereby driving the motor M1 based on the drive signal; in response to a second control signal, the first switch circuit 121 and the second switch circuit 122 are in an off state to turn off the drive circuit.

[0037] Specifically, motor M1 adopts a dual-end drive method, that is, the forward and reverse rotation is controlled by changing the voltage polarity between its first and second ends, thereby driving the door lock 300 to perform unlocking or locking actions. Specifically, the first end of motor M1 is electrically connected to the first drive output terminal of area controller 200 and the first drive output terminal of collision unlock controller 100 simultaneously through the first node P1; the second end of motor M1 is electrically connected to the second drive output terminal of area controller 200 and the second drive output terminal of collision unlock controller 100 simultaneously through the second node P2. The drive signal output by area controller 200 consists of a first sub-drive signal and a second sub-drive signal. When the first sub-drive signal is a first level signal (e.g., a high level signal) and the second sub-drive signal is a second level signal (e.g., a low level signal), motor M1 rotates in the forward direction; otherwise, it rotates in the reverse direction. The drive channel selection circuit 120 is not simply connected in series on a single line, but adopts a dual-path symmetrical topology, which specifically includes a first switch circuit 121 and a second switch circuit 122. The first switch circuit 121 is connected in series between the first drive output terminal of the area controller 200 and the first node P1, and is used to control the on / off state of the path; the second switch circuit 122 is connected in series between the second drive output terminal of the area controller 200 and the second node P2, and is used to independently control the on / off state of the path. The control terminals of the first switch circuit 121 and the second switch circuit 122 are both electrically connected to the output terminal of the control circuit 110.

[0038] Based on the above circuit connections, the detailed logic configuration of the drive channel selection circuit 120 is as follows: (1) On-state (in response to the first control signal): When the control circuit 110 does not receive a collision signal, it outputs the first control signal, which simultaneously enables the controlled terminals of the first switch circuit 121 and the second switch circuit 122. At this time, the first switch circuit 121 and the second switch circuit 122 respectively establish bidirectional low-impedance paths from the first drive output terminal of the area controller 200 to the first node P1 and from the second drive output terminal to the second node P2. The first sub-drive signal and the second sub-drive signal output by the area controller 200 can thus be applied completely and without loss to the first and second terminals of the motor M1, forming a complete differential drive circuit. The motor M1 executes the forward or reverse rotation commanded by the area controller 200 according to the voltage difference and polarity between the two terminals.

[0039] (2) Off State (in response to the second control signal): When the control circuit 110 receives a valid collision signal, it outputs a second control signal. The second control signal acts simultaneously on the controlled terminals of the first switching circuit 121 and the second switching circuit 122, causing them to synchronously switch to the high-impedance off state. At this time, the path from the first drive output terminal of the area controller 200 to the first node P1 and the path from the second drive output terminal to the second node P2 are both physically cut off. This dual-path synchronous off strategy ensures that both ends of the motor M1 are completely electrically isolated from the area controller 200. Thus, even if the area controller 200 continues to output any level combination after the collision (including but not limited to positive and negative drive voltages, floating or high impedance state), the signal cannot be coupled to the motor M1 terminal through any node, thereby ensuring that the emergency unlocking differential drive signal output by the collision unlocking controller 100 to the first node P1 and the second node P2 is not affected by any external source, realizing a clean and reliable door lock emergency drive.

[0040] Through the symmetrical design and synchronous control strategy of the dual-switch circuit described above, this configuration achieves redundant isolation of the fully differential drive path at the circuit level, combining high anti-interference capability and fault tolerance, providing a solid hardware foundation for millisecond-level reliable response to emergency unlocking under collision conditions.

[0041] In some embodiments, such as Figure 3 As shown, the first switching circuit 121 includes a first switching element Q1 and a second switching element Q2. Both the first switching element Q1 and the second switching element Q2 are electrically connected to the area controller 200 and the first node P1, respectively.

[0042] The first switching circuit 121 is configured to: in response to a first control signal and a first sub-drive signal being at a first level, turn on the first switching element Q1 and turn off the second switching element Q2; in response to a second level signal, turn off the first switching element Q1 and turn on the second switching element Q2; in response to a second control signal, turn off both the first switching element Q1 and the second switching element Q2; wherein, the conduction of one of the first switching element Q1 and the second switching element Q2 corresponds to the first switching circuit 121 being in a conducting state, and the turn-off of both the first switching element Q1 and the second switching element Q2 corresponds to the first switching circuit 121 being in a turning-off state.

[0043] In this circuit, the first switching element Q1 and the second switching element Q2 are two independent electronic switching devices (such as MOSFET, IGBT, or relay). The first switching element Q1 and the second switching element Q2 perform complementary conduction tasks in the circuit. By alternately conducting, they change the level state of the first node P1, thereby controlling the running direction of the motor M1 (such as forward or reverse rotation).

[0044] Under normal operating conditions: When the collision unlock controller 100 does not receive a collision signal, the control circuit 110 outputs a first control signal (effective enable level) to the control input terminal of the first switching circuit 121. The first control signal is logically combined with the first sub-drive signal itself to drive the first switching element Q1 and the second switching element Q2. Specifically: Upon receiving the first control signal, if the first sub-drive signal is a first-level signal (e.g., high level), the combinational logic causes the first switching element Q1 to meet the conduction condition, while the second switching element Q2 does not meet the conduction condition. Thus, the first switching element Q1 is turned on, and the second switching element Q2 is turned off. At this time, the first-level signal is transmitted to the first node P1 via the low-impedance path of the first switching element Q1, driving the motor M1 to perform operation in the first direction (e.g., forward).

[0045] Upon receiving the first control signal, if the first sub-drive signal is a second-level signal (e.g., low level), the combinational logic flips, causing the first switching element Q1 to turn off and the second switching element Q2 to turn on. At this time, the second-level signal is transmitted to the first node P1 via the low-impedance path of the second switching element Q2, driving the motor M1 to perform operation in the second direction (e.g., reverse).

[0046] In a collision scenario: Upon receiving a valid collision signal, the control circuit 110 immediately outputs a second control signal (either an invalid enable level or a forced shutdown level). This signal directly forces the first switching element Q1 and the second switching element Q2 to meet the cutoff condition. Regardless of the current level of the first sub-drive signal, both the first switching element Q1 and the second switching element Q2 synchronously switch to a high-impedance shutdown state. At this time, all electrical paths between the first drive output terminal of the area controller 200 and the first node P1 are physically severed.

[0047] In some embodiments, please continue to refer to Figure 3 The second switching circuit 122 includes a fifth switching element Q5 and a sixth switching element Q6. Both the fifth switching element Q5 and the sixth switching element Q6 are electrically connected to the area controller 200 and the second node P2, respectively.

[0048] The second switching circuit 122 is configured such that: in response to the first control signal and the second sub-drive signal being at a first level signal, the fifth switching element Q5 is turned on and the sixth switching element Q6 is turned off; in response to the first control signal and the second sub-drive signal being at a second level signal, the fifth switching element Q5 is turned off and the sixth switching element Q6 is turned on; in response to the second control signal, both the fifth switching element Q5 and the sixth switching element Q6 are turned off; wherein, the turning on of one of the fifth switching element Q5 and the sixth switching element Q6 corresponds to the second switching circuit 122 being in a conducting state, and the turning off of both the fifth switching element Q5 and the sixth switching element Q6 corresponds to the second switching circuit 122 being in a turning off state.

[0049] In this circuit, the fifth switching element Q5 and the sixth switching element Q6 are two independent electronic switching devices (such as MOSFETs, IGBTs, or relays). The fifth switching element Q5 and the sixth switching element Q6 perform complementary conduction tasks in the circuit. By alternately conducting, they change the level state of the second node P2, thereby controlling the running direction of the motor M1 (such as forward or reverse rotation).

[0050] Under normal operating conditions: When the collision unlock controller 100 does not receive a collision signal, the control circuit 110 outputs a first control signal (effective enable level) to the control input terminal of the second switching circuit 122. The first control signal is logically combined with the second sub-drive signal to drive the fifth switching element Q5 and the sixth switching element Q6. Specifically: Upon receiving the first control signal, if the second sub-drive signal is a second-level signal, the combinational logic causes the fifth switch element Q5 to not meet the conduction condition, while the sixth switch element Q6 meets the conduction condition. Therefore, the fifth switch element Q5 is turned off, and the sixth switch element Q6 is turned on. At this time, the second-level signal is transmitted to the second node P2 via the low-impedance path of the sixth switch element Q6. Simultaneously, the first sub-drive signal is a first-level signal, which is transmitted to the first node P1 via the low-impedance path of the first switch element Q1. Thus, the necessary potential difference is established between the two ends of motor M1 (the first node P1 and the second node P2, respectively), forming a drive current loop, driving motor M1 to perform operation in the first direction.

[0051] Upon receiving the first control signal, if the second sub-drive signal is a first-level signal, the combinational logic flips, causing the fifth switch element Q5 to turn on and the sixth switch element Q6 to turn off. At this time, the first-level signal is transmitted to the second node P2 via the low-impedance path of the fifth switch element Q5. Simultaneously, the first sub-drive signal is a second-level signal, which is transmitted to the first node P1 via the low-impedance path of the second switch element Q2. Thus, the necessary potential difference is established across the two ends of motor M1, forming a drive current loop, driving motor M1 to operate in the second direction.

[0052] In a collision scenario: Upon receiving a valid collision signal, the control circuit 110 immediately outputs a second control signal (either an invalid enable level or a forced shutdown level). This signal directly forces the fifth switch element Q5 and the sixth switch element Q6 to meet the cutoff condition. Regardless of the current level of the second sub-drive signal, both the fifth switch element Q5 and the sixth switch element Q6 synchronously switch to the high-impedance shutdown state. At this time, all electrical paths between the second drive output terminal of the area controller 200 and the second node P2 are physically severed.

[0053] In some embodiments, such as Figure 4 As shown, the first switching circuit 121 also includes a third switching element Q3 and a fourth switching element Q4. The fourth switching element Q4 is electrically connected to the control circuit 110, the third switching element Q3, the second switching element Q2 and the first power supply V1, respectively. The third switching element Q3 is electrically connected to the first switching element Q1.

[0054] The first switching circuit 121 is configured such that: when the fourth switching element Q4 is turned off in response to the first control signal, the third switching element Q3 is turned on in response to the voltage of the first power supply V1 (typically a low-voltage regulated power supply, such as +12V logic level); the first switching element Q1 is turned on in response to the first sub-drive signal being a first level signal or turned off in response to the first sub-drive signal being a second level signal; the second switching element Q2 is turned off in response to the first sub-drive signal being a first level signal or turned on in response to the first sub-drive signal being a second level signal; when the fourth switching element Q4 is turned on in response to the second control signal, the third switching element Q3 is turned off in response to the fourth switching element Q4 being turned on; the first switching element Q1 is turned off in response to the third switching element Q3 being turned off; and the second switching element Q2 is turned off in response to the fourth switching element Q4 being turned on.

[0055] Specifically, under normal operating conditions, when the control circuit 110 outputs the first control signal: The fourth switching element Q4 is turned off in response to the first control signal. Since the fourth switching element Q4 is off, the first power supply V1 drives the third switching element Q3 to turn on. After the third switching element Q3 turns on, whether the first switching element Q1 turns on depends on the level of the first sub-driving signal: if the first sub-driving signal is a first-level signal, then the first switching element Q1 meets the turn-on condition and turns on, and the first sub-driving signal is transmitted to the first node P1 through the low impedance of the first switching element Q1; if the first sub-driving signal is a second-level signal, then the first switching element Q1 does not meet the turn-on condition and turns off.

[0056] At the same time, the fourth switching element Q4 is turned off, and the first power supply V1 is applied to the second switching element Q2. At this time, whether the second switching element Q2 is turned on or off depends on the level of the first sub-driving signal: if the first sub-driving signal is a first level signal, the second switching element Q2 does not meet the turn-on condition and is turned off; if the first sub-driving signal is a second level signal, the second switching element Q2 meets the turn-on condition and is turned on, and the first sub-driving signal is transmitted to the first node P1 through the low resistance of the second switching element Q2.

[0057] Under collision conditions, when the control circuit 110 receives a valid collision signal and outputs a second control signal, the fourth switching element Q4 turns on in response to the second control signal. After the fourth switching element Q4 turns on, both the second switching element Q2 and the third switching element Q3 turn off. At the same time, after the third switching element Q3 turns off, the first switching element Q1 does not meet the conduction condition and turns off.

[0058] In some embodiments, please continue to refer to Figure 4 The second switching circuit 122 also includes a seventh switching element Q7 and an eighth switching element Q8. The eighth switching element Q8 is electrically connected to the control circuit 110, the seventh switching element Q7, the sixth switching element Q6 and the first power supply V1, respectively. The seventh switching element Q7 is electrically connected to the fifth switching element Q5.

[0059] The second switching circuit 122 is configured such that: when the eighth switching element Q8 is turned off in response to the first control signal, the seventh switching element Q7 is turned on in response to the voltage of the first power supply V1, the fifth switching element Q5 is turned on in response to the second sub-drive signal being a first level signal or turned off in response to the second sub-drive signal being a second level signal, and the sixth switching element Q6 is turned off in response to the second sub-drive signal being a first level signal or turned on in response to the second sub-drive signal being a second level signal; when the eighth switching element Q8 is turned on in response to the second control signal, the seventh switching element Q7 is turned off in response to the eighth switching element Q8 being turned on, the fifth switching element Q5 is turned off in response to the seventh switching element Q7 being turned off, and the sixth switching element Q6 is turned off in response to the eighth switching element Q8 being turned on.

[0060] Specifically, under normal operating conditions, when the control circuit 110 outputs the first control signal: The eighth switching element Q8 is turned off in response to the first control signal. Since the eighth switching element Q8 is off, the first power supply V1 drives the seventh switching element Q7 to turn on. After the seventh switching element Q7 turns on, whether the fifth switching element Q5 turns on depends on the level of the second sub-driving signal: if the second sub-driving signal is a first-level signal, then the fifth switching element Q5 meets the turn-on condition and turns on, and the second sub-driving signal is transmitted to the second node P2 through the low impedance of the fifth switching element Q5; if the second sub-driving signal is a second-level signal, then the fifth switching element Q5 does not meet the turn-on condition and turns off.

[0061] At the same time, the eighth switch element Q8 is turned off, and the first power supply V1 is applied to the sixth switch element Q6. At this time, whether the sixth switch element Q6 is turned on or off depends on the level of the second sub-drive signal: if the second sub-drive signal is a first level signal, the sixth switch element Q6 does not meet the turn-on condition and is turned off; if the second sub-drive signal is a second level signal, the sixth switch element Q6 meets the turn-on condition and is turned on, and the second sub-drive signal is transmitted to the second node P2 through the low resistance of the sixth switch element Q6.

[0062] In a collision scenario, when the control circuit 110 receives a valid collision signal and outputs a second control signal, the eighth switching element Q8 turns on in response to the second control signal. After the eighth switching element Q8 turns on, both the sixth switching element Q6 and the seventh switching element Q7 turn off. Simultaneously, after the seventh switching element Q7 turns off, the fifth switching element Q5 does not meet the conduction condition and turns off.

[0063] Figure 5 An exemplary circuit implementation of the collision unlock controller 100 is shown. For example... Figure 5 As shown, the first switching element Q1 is a PMOS transistor, and the second switching element Q2, the third switching element Q3 and the fourth switching element Q4 are NMOS transistors.

[0064] The gate of the fourth switching element Q4 is electrically connected to the control circuit 110. The source of the fourth switching element Q4 and the source of the third switching element Q3 are both grounded to GND. The drain of the fourth switching element Q4 is electrically connected to the gate of the third switching element Q3, the gate of the second switching element Q2, and the first power supply V1. The drain of the third switching element Q3 is electrically connected to the gate of the first switching element Q1. The source of the first switching element Q1 and the drain of the second switching element Q2 are both electrically connected to the area controller 200. The drain of the first switching element Q1 and the source of the second switching element Q2 are both electrically connected to the first node P1.

[0065] The first switching circuit 121 also includes a first resistor R1 and a second resistor R2.

[0066] The first resistor R1 is electrically connected between the gate and source of the first switching element Q1, and the second resistor R2 is electrically connected between the first power supply V1 and the drain of the fourth switching element Q4.

[0067] The fifth switching element Q5 is a PMOS transistor, and the sixth, seventh, and eighth switching elements Q6, Q7, and Q8 are NMOS transistors.

[0068] The gate of the eighth switching element Q8 is electrically connected to the control circuit 110. The source of the eighth switching element Q8 and the source of the seventh switching element Q7 are both grounded to GND. The drain of the eighth switching element Q8 is electrically connected to the gate of the seventh switching element Q7, the gate of the sixth switching element Q6, and the first power supply V1. The drain of the seventh switching element Q7 is electrically connected to the gate of the fifth switching element Q5. The source of the fifth switching element Q5 and the drain of the sixth switching element Q6 are both electrically connected to the area controller 200. The drain of the fifth switching element Q5 and the source of the sixth switching element Q6 are both electrically connected to the second node P2.

[0069] The second switching circuit 122 also includes a third resistor R3 and a fourth resistor R4.

[0070] The third resistor R3 is electrically connected between the gate and source of the fifth switching element Q5, and the fourth resistor R4 is electrically connected between the first power supply V1 and the drain of the eighth switching element Q8.

[0071] The following are Figure 5 The principle of the circuit structure shown will be explained. Taking the example of a first power supply V1 of 12V, a first control signal of low level, a second control signal of high level, a first level signal corresponding to 12V high level, a second level signal corresponding to 0V low level, a positive terminal of motor M1 electrically connected to the first node P1, and a negative terminal of motor M1 electrically connected to the second node P2.

[0072] 1. The vehicle is in normal operating condition (no collision has occurred). The control circuit 110 outputs a low-level signal, and the fourth switching element Q4 and the eighth switching element Q8 remain off.

[0073] When the fourth switch element Q4 is off, the first power supply V1 pulls up the gates of the third switch element Q3 and the second switch element Q2 through the second resistor R2, turning on the third switch element Q3. When the eighth switch element Q8 is off, the first power supply V1 pulls up the gates of the seventh switch element Q7 and the sixth switch element Q6 through the fourth resistor R4, turning on the seventh switch element Q7. The circuit enters a controllable drive state, relying on two directional voltage levels to achieve forward and reverse rotation of the motor. (1) When the motor is rotating forward, the first sub-drive signal is 12V and the second sub-drive signal is 0V.

[0074] The third switching element Q3 turns on, pulling the gate of the first switching element Q1 to ground potential; the source potential of the first switching element Q1 is 12V, and the gate-source voltage VGS of the first switching element Q1 is -12V, which satisfies the PMOS turn-on condition, so the first switching element Q1 turns on, and the first node P1 (i.e. the positive terminal of motor M1) is 12V.

[0075] When the seventh switching element Q7 is turned on, it pulls the gate of the fifth switching element Q5 to ground. The source potential of the fifth switching element Q5 is 0V, and the gate-source voltage VGS of the fifth switching element Q5 is 0V, so the fifth switching element Q5 is turned off. The gate of the sixth switching element Q6 is pulled up to 12V. Relying on its own diode, the source potential of the sixth switching element Q6 follows the drain potential to 0V, and the gate-source voltage VGS of the sixth switching element Q6 is approximately 12V, which satisfies the NMOS turn-on condition. The sixth switching element Q6 is turned on, and the second node P2 (i.e., the negative terminal of motor M1) is 0V.

[0076] Therefore, motor M1 rotates in the forward direction.

[0077] (2) When the motor reverses, the first sub-drive signal is 0V and the second sub-drive signal is 12V.

[0078] The third switching element Q3 turns on, pulling the gate of the first switching element Q1 to ground. The source potential of the first switching element Q1 is 0V, and the gate-source voltage VGS of the first switching element Q1 is 0V, so the first switching element Q1 is turned off. The gate of the second switching element Q2 is pulled up to 12V. Relying on the body diode, the source potential of the second switching element Q2 follows the drain potential to 0V, and the gate-source voltage VGS of the second switching element Q2 is ≈12V. When the second switching element Q2 turns on, the first node P1 (i.e., the positive terminal of motor M1) is 0V.

[0079] When the seventh switching element Q7 is turned on, it pulls the gate of the fifth switching element Q5 to ground potential. The source potential of the fifth switching element Q5 is 12V, and the gate-source voltage VGS of the fifth switching element Q5 is -12V, which satisfies the PMOS turn-on condition. The fifth switching element Q5 is turned on, and the second node P2 (i.e., the negative terminal of motor M1) is 12V.

[0080] As a result, motor M1 reverses direction.

[0081] 2. Collision emergency mode (collision unlock controller 100 receives a collision signal) The control circuit 110 immediately outputs a high-level signal, and the fourth switching element Q4 and the eighth switching element Q8 are simultaneously turned on.

[0082] After the fourth switching element Q4 is turned on, the gates of the third switching element Q3 and the second switching element Q2 are short-circuited to ground through the fourth switching element Q4, and the third switching element Q3 and the second switching element Q2 are turned off; the gate of the first switching element Q1 is pulled up to the source potential through the first resistor R1, the gate-source voltage VGS of the first switching element Q1 is 0V, the first switching element Q1 is reliably turned off, and the drive path from the area controller 200 to the first node P1 is cut off.

[0083] After the eighth switching element Q8 is turned on, the gates of the seventh switching element Q7 and the sixth switching element Q6 are short-circuited to ground through the eighth switching element Q8, and the sixth switching element Q6 and the seventh switching element Q7 are turned off; the gate of the fifth switching element Q5 is pulled up to the source potential through the third resistor R3, the gate-source voltage VGS of the fifth switching element Q5 is 0V, the fifth switching element Q5 is reliably turned off, and the drive path from the area controller 200 to the second node P2 is cut off.

[0084] Regardless of the drive level being output by the area controller 200 at the moment of the collision, the first switch circuit 121 and the second switch circuit 122 are simultaneously turned off, isolating the vehicle area controller 200 from the motor terminals P1 and P2. The area controller 200 can no longer drive the door lock motor M1, eliminating the risk of conflict between the area controller 200's drive signal and the collision unlock controller 100's output signal, preventing a short circuit caused by bidirectional drive, and simultaneously preventing interference from the area controller 200's signal to the collision unlock controller 100, ensuring reliable execution of the emergency unlock function.

[0085] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

[0086] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A collision unlocking controller, characterized in that, Applied to a vehicle, the vehicle further includes a door lock, a motor, and a zone controller. The motor is electrically connected to the zone controller and the collision unlocking controller. The motor is used to drive the door lock to unlock or lock. The collision unlocking controller includes: The control circuit and the drive channel selection circuit are respectively electrically connected to the area controller, the control circuit and the motor; The collision unlock controller is configured as follows: In response to the absence of a collision signal from the vehicle, the control circuit outputs a first control signal, and the drive channel selection circuit is controlled by the first control signal to activate the drive circuit of the area controller driving the motor, so as to drive the motor based on the drive signal output by the area controller. In response to receiving the collision signal, the control circuit outputs a second control signal, and the drive channel selection circuit is controlled by the second control signal to shut down the drive circuit.

2. The collision unlocking controller according to claim 1, characterized in that, The first end of the motor is electrically connected to the area controller and the collision unlocking controller at a first node, and the second end of the motor is electrically connected to the area controller and the collision unlocking controller at a second node; The driving signal includes a first sub-driving signal and a second sub-driving signal, wherein the first sub-driving signal and the second sub-driving signal are different signals; The drive channel selection circuit includes a first switch circuit and a second switch circuit. The first switch circuit is electrically connected to the area controller, the control circuit and the first node, respectively. The second switch circuit is electrically connected to the area controller, the control circuit and the second node, respectively. The drive channel selection circuit is configured as follows: In response to the first control signal, the first switching circuit and the second switching circuit are in the on state to turn on the drive circuit, so that the first sub-drive signal acts on the first node and the second sub-drive signal acts on the second node, thereby driving the motor based on the drive signal; In response to the second control signal, the first switching circuit and the second switching circuit are in the off state to shut down the drive circuit.

3. The collision unlocking controller according to claim 2, characterized in that, The first switching circuit includes a first switching element and a second switching element; Both the first switching element and the second switching element are electrically connected to the area controller and the first node, respectively; The first switching circuit is configured as follows: In response to the first control signal and the first sub-drive signal being at a first level signal, the first switching element is turned on and the second switching element is turned off. In response to the first control signal and the first sub-drive signal being at the second level, the first switching element is turned off and the second switching element is turned on. In response to the second control signal, both the first switching element and the second switching element are turned off; Wherein, if one of the first switching element and the second switching element is turned on, the first switching circuit is in the on state; if both the first switching element and the second switching element are turned off, the first switching circuit is in the off state.

4. The collision unlocking controller according to claim 3, characterized in that, The first switching circuit further includes a third switching element and a fourth switching element; The fourth switching element is electrically connected to the control circuit, the third switching element, the second switching element, and the first power supply, respectively; the third switching element is electrically connected to the first switching element. The first switching circuit is configured as follows: When the fourth switching element is turned off in response to the first control signal, the third switching element is turned on in response to the voltage of the first power supply, the first switching element is turned on in response to the first sub-drive signal being the first level signal or turned off in response to the first sub-drive signal being the second level signal, and the second switching element is turned off in response to the first sub-drive signal being the first level signal or turned on in response to the first sub-drive signal being the second level signal. When the fourth switching element is turned on in response to the second control signal, the third switching element is turned off in response to the fourth switching element being turned on, the first switching element is turned off in response to the third switching element being turned off, and the second switching element is turned off in response to the fourth switching element being turned on.

5. The collision unlocking controller according to claim 4, characterized in that, The first switching element is a PMOS transistor, and the second, third, and fourth switching elements are NMOS transistors; The gate of the fourth switching element is electrically connected to the control circuit. The source of the fourth switching element and the source of the third switching element are both grounded. The drain of the fourth switching element is electrically connected to the gate of the third switching element, the gate of the second switching element, and the first power supply. The drain of the third switching element is electrically connected to the gate of the first switching element. The source of the first switching element and the drain of the second switching element are both electrically connected to the area controller. The drain of the first switching element and the source of the second switching element are both electrically connected to the first node.

6. The collision unlocking controller according to claim 5, characterized in that, The first switching circuit also includes a first resistor and a second resistor; The first resistor is electrically connected between the gate and source of the first switching element, and the second resistor is electrically connected between the first power supply and the drain of the fourth switching element.

7. The collision unlocking controller according to claim 2, characterized in that, The second switching circuit includes a fifth switching element and a sixth switching element; The fifth and sixth switching elements are respectively electrically connected to the area controller and the second node; The second switching circuit is configured as follows: In response to the first control signal and the second sub-drive signal being at the first level signal, the fifth switching element is turned on and the sixth switching element is turned off; In response to the first control signal and the second sub-drive signal being at the second level, the fifth switching element is turned off and the sixth switching element is turned on; In response to the second control signal, both the fifth and sixth switching elements are turned off; Wherein, if one of the fifth and sixth switching elements is turned on, the second switching circuit is in the on state; if both the fifth and sixth switching elements are turned off, the second switching circuit is in the off state.

8. The collision unlocking controller according to claim 7, characterized in that, The second switching circuit also includes a seventh switching element and an eighth switching element; The eighth switching element is electrically connected to the control circuit, the seventh switching element, the sixth switching element, and the first power supply, respectively; the seventh switching element is electrically connected to the fifth switching element. The second switching circuit is configured as follows: When the eighth switching element is turned off in response to the first control signal, the seventh switching element is turned on in response to the voltage of the first power supply, the fifth switching element is turned on in response to the second sub-drive signal being the first level signal or turned off in response to the second sub-drive signal being the second level signal, and the sixth switching element is turned off in response to the second sub-drive signal being the first level signal or turned on in response to the second sub-drive signal being the second level signal; When the eighth switching element is turned on in response to the second control signal, the seventh switching element is turned off in response to the eighth switching element being turned on, the fifth switching element is turned off in response to the seventh switching element being turned off, and the sixth switching element is turned off in response to the eighth switching element being turned on.

9. The collision unlocking controller according to claim 8, characterized in that, The fifth switching element is a PMOS transistor, and the sixth, seventh, and eighth switching elements are NMOS transistors; The gate of the eighth switching element is electrically connected to the control circuit. The source of the eighth switching element and the source of the seventh switching element are both grounded. The drain of the eighth switching element is electrically connected to the gate of the seventh switching element, the gate of the sixth switching element, and the first power supply. The drain of the seventh switching element is electrically connected to the gate of the fifth switching element. The source of the fifth switching element and the drain of the sixth switching element are both electrically connected to the area controller. The drain of the fifth switching element and the source of the sixth switching element are both electrically connected to the second node.

10. The collision unlocking controller according to claim 9, characterized in that, The second switching circuit also includes a third resistor and a fourth resistor; The third resistor is electrically connected between the gate and source of the fifth switching element, and the fourth resistor is electrically connected between the first power supply and the drain of the eighth switching element.

11. A vehicle, characterized in that, Includes door locks, motors, area controllers, and collision unlocking controllers as described in any one of claims 1-10; The motor is electrically connected to the area controller and the collision unlocking controller. The motor is controlled by the area controller or the collision unlocking controller to drive the door lock to unlock or lock. The area controller is used to control the motor when the vehicle does not collide, and the collision unlocking controller is used to control the motor when the vehicle collides.

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