Automobile door lock control system and automobile

Abstract

The invention discloses an automobile door lock control system and a vehicle, the automobile door lock control system comprises an automobile body left and right area controller and a central control circuit, the automobile body left and right area controller is connected with a safety air bag ECU of the vehicle, a CAN bus and a motor of an automobile door lock; the controller is configured to control the motor to open an automobile door lock according to a detection signal of the safety air bag ECU and a message of the CAN bus; and the central control circuit is connected with the safety air bag ECU, the CAN bus and the motor, and is configured to control the motor to open an automobile door lock according to the detection signal and the message. According to the automobile door lock control system and the automobile provided by the embodiment of the invention, compared with an existing automobile door lock control system, the central control circuit is newly added as redundancy control, when unlocking is needed but the automobile body left and right domain controllers cannot be normally unlocked, forced unlocking can be performed through the central control circuit, so that emergency and forced unlocking of the automobile door lock after collision is not affected, and the safety of the automobile door lock is improved. The unlocking reliability of the automobile door lock under the dangerous condition can be improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle safety assistance technology, and more specifically, to an automobile door lock control system and a vehicle. Background Art

[0002] At present, car door locks are generally controlled by left and right domain controllers. However, since the left and right domain controllers are located in front of the driver and co-driver seats, respectively, and are relatively close to the front and side of the car, when a car collides, the violent impact is likely to cause functional failures in the left and right domain controllers, resulting in individual doors or all doors not being unlocked normally, posing a safety hazard. Summary of the invention

[0003] Embodiments of the present application provide a vehicle door lock control system and a vehicle.

[0004] The automobile door lock control system of the embodiment of the present application includes:

[0005] The left and right domain controllers of the vehicle body are connected to the airbag ECU, the CAN bus and the motor of the car door lock of the vehicle, and are configured to control the motor to open the car door lock according to the detection signal of the airbag ECU and the message of the CAN bus;

[0006] A central control circuit is connected to the airbag ECU, the CAN bus and the motor, and is configured to control the motor to open the vehicle door lock according to the detection signal and the message.

[0007] The automobile door lock control system provided in the embodiment of the present application is compared to the existing automobile door lock control system. The automobile door lock control system of the embodiment of the present application adds a central control circuit as a redundant control. When unlocking is required but the left and right domain controllers of the vehicle body cannot unlock normally, the central control circuit can be used to force unlocking, thereby not affecting the emergency and forced unlocking of the automobile door lock after a collision, and can improve the reliability of unlocking the automobile door lock in dangerous situations.

[0008] In some embodiments, the vehicle includes a hidden door handle, and the left and right domain controllers of the vehicle body are configured to control the motor to drive the door handle to extend according to the detection signal of the airbag ECU and the message of the CAN bus;

[0009] The central control circuit is configured to control the motor to drive the door handle to extend according to the detection signal and the message.

[0010] In this way, for vehicles with hidden door handles, the door handles can be extended while controlling the car door lock, further facilitating the opening of the door.

[0011] In some embodiments, the central control circuit includes:

[0012] A high-side switch group, wherein the high-side switch group connects a driving power source and the motor;

[0013] A low-side switch group, wherein the low-side switch group connects the motor and ground;

[0014] A microcontroller is provided, wherein the microcontroller is connected to the high-side switch group and the low-side switch group, and controls the high-side switch group to connect the driving power supply and the motor, and the low-side switch group to connect the motor and the ground.

[0015] In this way, the high-side switch group and the low-side switch group can be controlled by the microcontroller to open the car door lock.

[0016] In some embodiments, the high-side switch group includes:

[0017] A first switch, the first switch comprising a first control end, a first inflow end connected to the driving power supply, and a first outflow end connected to the motor;

[0018] A first voltage divider circuit is connected between the driving power supply and the first control terminal, and the first voltage divider circuit is connected in parallel between the first control terminal and the first inflow terminal;

[0019] A first transistor includes a first base connected to the microcontroller, a first collector connected to the first voltage divider circuit, and a grounded first emitter.

[0020] In this way, the microcontroller can control the on and off of the first switch by inputting a high level to the first transistor, thereby unlocking the car door lock.

[0021] In some embodiments, the high-side switch group further includes:

[0022] A first voltage-stabilizing diode, wherein a first anode of the first voltage-stabilizing diode is connected to the first control end, and a first cathode of the first voltage-stabilizing diode is connected to the first inflow end.

[0023] In this way, the first voltage regulator diode is used to protect the first switch, preventing the voltage applied between the first control terminal and the first inflow terminal of the first switch from exceeding the specification and damaging the first switch.

[0024] In some embodiments, the low side switch group includes:

[0025] a second switch, the second switch comprising a second control terminal, a second inflow terminal connected to the motor, and a second outflow terminal connected to the ground;

[0026] A second voltage-dividing circuit is connected between the motor and the second control end, and the second voltage-dividing circuit is connected in parallel between the second control end and the second inflow end;

[0027] The second transistor comprises a second base connected to the microcontroller, a second collector connected to the voltage divider circuit and a grounded second emitter.

[0028] In this way, the microcontroller can control the on and off of the second switch by inputting a high level to the second transistor, so as to form a complete unlocking drive circuit.

[0029] In some embodiments, the low-side switch group further includes:

[0030] A second voltage-stabilizing diode, wherein a second anode of the second voltage-stabilizing diode is connected to the second control end, and a second cathode of the second voltage-stabilizing diode is connected to the second inflow end.

[0031] In this way, the second voltage regulator diode is used to protect the second switch, preventing the voltage applied between the second control terminal and the second inflow terminal of the second switch from exceeding the specification and damaging the second switch.

[0032] In some embodiments, the microcontroller is configured to control the high-side switch group and the low-side switch group to open so as to control the motor to open the car door lock when it is determined according to the message that the collision intensity reaches a preset intensity.

[0033] In this way, the car door lock control system can control the car door lock to open when it is hit and the collision intensity reaches a preset intensity.

[0034] In some embodiments, the microcontroller is configured to control the high-side switch group and the low-side switch group to open so as to control the motor to open the car door lock when it is determined that the collision intensity reaches a preset intensity according to the detection signal.

[0035] In this way, the car door lock control system can control the car door lock to open when the detection signal changes and the collision intensity reaches a preset intensity.

[0036] In some embodiments, the microcontroller is configured to control the high-side switch group and the low-side switch group to control the motor to open the vehicle door lock when the left and right domain controllers of the vehicle body fail to unlock.

[0037] In this way, the car door lock control system can control the car door lock to open in other situations where the car door lock needs to be opened but is not opened normally.

[0038] In some embodiments, the microcontroller is configured to determine that the unlocking of the left and right domain controllers of the vehicle body has failed when receiving a message for unlocking the vehicle doors and not receiving a message for unlocking the left and right domains of the vehicle doors.

[0039] In this way, the car door lock control system can control the car door lock to be opened in other situations where the car door lock needs to be opened but no unlocked door message is received.

[0040] In some embodiments, the microcontroller is configured to determine that the vehicle body left and right domain controllers have failed to unlock when a vehicle body left and right domain fault message is received or the unlocking time exceeds a preset time.

[0041] In this way, the car door lock control system can determine that the left and right domain controllers of the car body have failed to unlock when the car door lock needs to be opened but the left and right domains of the car body fail or the unlocking time is too long.

[0042] A vehicle according to another embodiment of the present application includes any of the above-mentioned vehicle door lock control systems.

[0043] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0045] Figure 1 It is a module schematic diagram of a vehicle door lock control system of a vehicle according to an embodiment of the present application;

[0046] Figure 2 It is a module schematic diagram of a central control switch of a vehicle door lock control system of an embodiment of the present application;

[0047] Figure 3 is a circuit diagram of a high-side switch group of a vehicle door lock control system of a vehicle according to an embodiment of the present application;

[0048] Figure 4 is a circuit diagram of a low-side switch group of a vehicle door lock control system of a vehicle according to an embodiment of the present application;

[0049] Figure 5 It is a flowchart of a control method of a vehicle door lock control system of a vehicle according to an embodiment of the present application.

[0050] Description of the main component symbols: vehicle 1000, automobile door lock control system 100, left and right domain controllers of the vehicle body 10, central control circuit 20, high-side switch group 21, first switch 211, first voltage divider circuit 212, first transistor 213, first voltage regulator diode 214, first anti-reverse diode 215, low-side switch group 22, second switch 221, second voltage divider circuit 222, second transistor 223, second voltage regulator diode 224, first anti-reverse diode 225, microcontroller 23, airbag ECU 200, CAN bus 300, motor 400, automobile door lock 500, door handle 600, driving power supply 700. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is 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 limiting the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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 directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] The disclosure herein provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described herein. Of course, they are merely examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art may appreciate the application of other processes and / or the use of other materials.

[0055] With the popularity of cars and the increase in the frequency of use, the problem of car door locks not being able to be opened has attracted increasing attention. In particular, the widespread use of hidden door handles has also brought about a potential safety hazard. When a vehicle crashes, if the hidden door handle cannot be extended in time, it will be difficult for people outside the car to open the door, which will seriously endanger the safety of passengers.

[0056] At present, car door locks are generally controlled by left and right domain controllers. However, since the left and right domain controllers are located in front of the driver and co-driver seats, respectively, and are relatively close to the front and side of the car, when a car collides, the violent impact is likely to cause functional failures in the left and right domain controllers, resulting in individual doors or all doors not being unlocked normally, posing a safety hazard.

[0057] See also Figure 1A vehicle 1000 according to an embodiment of the present application includes a car door lock control system 100, including left and right domain controllers 10 of the vehicle body and a central control circuit 20. The left and right domain controllers 10 of the vehicle body are connected to the airbag ECU 200, the CAN bus ECU 300 and the motor 400 of the car door lock 500 of the vehicle 1000, and are configured to control the motor 400 to open the car door lock 500 according to the detection signal of the airbag ECU 200 and the message of the CAN bus ECU 300; the central control circuit 20 is connected to the airbag ECU 200, the CAN bus ECU 300 and the motor 400, and is configured to control the motor 400 to open the car door lock 500 according to the detection signal and the message.

[0058] The automobile door lock control system 100 provided in the embodiment of the present application is compared to the existing automobile door lock control system 100. The automobile door lock control system 100 of the embodiment of the present application adds a central control circuit 20 as redundant control. When unlocking is required but the left and right domain controllers 10 of the vehicle body cannot unlock normally, the central control circuit 20 can be used to force unlocking, thereby not affecting the emergency and forced unlocking of the automobile door lock 500 after a collision, and can improve the reliability of unlocking the automobile door lock 500 in dangerous situations.

[0059] Furthermore, the central control circuit 20 is located in the center of the cockpit, and it is generally difficult to cause direct damage to the components of the central control circuit 20 when the vehicle 1000 collides, which can further improve the reliability of unlocking the car door lock 500 in dangerous situations. In addition, the central control circuit 20 itself is one of the car parts, and the function of the part itself is simple, and the addition of redundant door lock control will not have a great impact on the original function.

[0060] Specifically, the left and right domain controllers 10 of the vehicle body are important components of the automotive electrical and electronic architecture (EEA), and they are responsible for controlling the electrical and electronic systems on the left and right sides of the vehicle body.

[0061] Airbag ECU200 is an electronic control unit used to detect collision acceleration signals and control the airbag detonation time. It is an important module of the automobile passive safety system and plays an important role in protecting the personal safety of passengers. Airbag ECU200 usually accurately calculates, processes and judges the information input by the air flow meter and various sensors based on built-in programs and data, and then outputs instructions to control the detonation time of the airbag to ensure that the passengers can be protected quickly and accurately when a collision occurs.

[0062] CAN bus ECU300 refers to Controller Area Network (CAN), which is a serial bus communication protocol for data communication. It was originally developed by BOSCH in Germany and is widely used in communication between automotive electronic control units (ECUs). With the development of technology, CAN bus ECU300 is no longer limited to the automotive field, but has also been widely used in many fields such as ships, trains, aviation, machinery and medical equipment.

[0063] In the embodiment of the present application, after the car is hit, the airbag ECU 200 generates a collision signal, which is simultaneously output to the left and right domain controllers 10 and the central control circuit 20 for detection. The central control circuit 20 determines whether to force the door to open based on the received signal and message.

[0064] In the embodiment of the present application, the motor 400 is arranged in the car door lock 500, and the car door lock control system 100 also includes a driver IC. The left and right domain controllers 10 of the vehicle body control the motor 400 through the driver IC to drive the car door lock 500 to open.

[0065] In some embodiments, the vehicle 1000 includes a hidden door handle 600, and the left and right domain controllers 10 of the vehicle body are configured to control the motor 400 to drive the door handle 600 to extend according to the detection signal of the airbag ECU 200 and the message of the CAN bus ECU 300;

[0066] The central control circuit 20 is configured to control the motor 400 to drive the door handle 600 to extend according to the detection signal and the message.

[0067] In this way, for a vehicle 1000 with a hidden door handle 600, the door handle 600 can be controlled to extend while controlling the vehicle door lock 500, further facilitating the opening of the door.

[0068] Specifically, in the embodiment of the present application, the vehicle 1000 includes a hidden door handle 600, and the airbag ECU 200 generates a collision signal, which is simultaneously output to the left and right domain controllers 10 and the central control circuit 20 for detection. The central control circuit 20 determines whether to control the motor 400 to force the door handle 600 to extend according to the received signal and message.

[0069] In an embodiment of the present application, the motor 400 that drives the door handle 600 to extend and the motor 400 that drives the car door lock 500 can be the same, and the motor 400 is arranged in the car door lock 500. In other embodiments, different motors 400 can also be arranged to drive the door handle 600 and drive the car door lock 500, wherein the motor 400 for driving the car door lock 500 to extend is arranged in the car door lock 500, and the motor 400 for driving the door handle 600 to extend is arranged in the door handle 600.

[0070] In other embodiments, if the vehicle 1000 does not have a hidden door handle 600, the control of the door handle 600 may be canceled according to actual conditions.

[0071] See also Figure 2 In some embodiments, the central control circuit 20 includes a high-side switch group 21, a low-side switch group 22 and a microcontroller 23. The high-side switch group 21 connects the driving power supply 700 and the motor 400; the low-side switch group 22 connects the motor 400 and the ground; the microcontroller 23 connects the high-side switch group 21 and the low-side switch group 22, and controls the high-side switch group 21 to connect the driving power supply 700 and the motor 400, and the low-side switch group 22 to connect the motor 400 and the ground.

[0072] In this way, the high-side switch group 21 and the low-side switch group 22 can be controlled by the microcontroller 23 to open the car door lock 500 .

[0073] Specifically, the high-side switch group 21 is an electronic component group used to control the on-off of the load. Its main feature is to connect the positive end (i.e., the high potential end) of the circuit to the load, and to control the load current by controlling the on-off of the switch element.

[0074] The low side switch group 22 mainly controls the load circuit by controlling the on and off of the transistor. Specifically, the low side switch group 22 is characterized in that the transistor is grounded, that is, the transistor is located between the load and the ground, and the on and off between the load circuit and the ground is controlled by controlling the switching state of the transistor.

[0075] In the embodiment of the present application, when the central control circuit 20 unlocks the vehicle door, the high-side switch group 21 and the low-side switch group 22 are opened at the same time, and the power passes through the high-side switch group 21 to drive the door lock motor 400 to rotate, and then flows through the low-side switch group 22 and enters the ground, forming a complete unlocking drive circuit.

[0076] See also Figure 3In some embodiments, the high-side switch group 21 includes a first switch 211, a first voltage divider circuit 212 and a first transistor 213, the first switch 211 includes a first control end, a first inflow end connected to the driving power supply 700 and a first outflow end connected to the motor 400; it is connected between the driving power supply 700 and the first control end, and the first voltage divider circuit 212 is connected in parallel between the first control end and the first inflow end; the first transistor 213 includes a first base connected to the microcontroller 23, a first collector connected to the first voltage divider circuit 212 and a first emitter connected to the ground.

[0077] In this way, the microcontroller 23 can control the on and off of the first switch 211 by inputting a high level to the first transistor 213 , thereby unlocking the car door lock 500 .

[0078] Specifically, in the embodiment of the present application, the first switch 211 is a PMOS tube, which is a type of metal-oxide semiconductor field effect transistor. The PMOS tube is mainly used as a switching element or amplifier in an electronic circuit. The voltage difference between its output voltage and input voltage is small, and it works stably when the input power supply voltage is higher than the output power supply voltage, and has a low reverse leakage current. The first switch 211 is used as a power channel switch. The PMOS is a high-power device that can pass 100A current.

[0079] The first voltage divider circuit 212 includes a plurality of resistors and a plurality of capacitors, wherein the resistors play the role of current limiting and voltage dividing, and the capacitors play the role of filtering and energy storage. Specifically, the number of resistors and capacitors can be selected according to actual needs. In the embodiment of the present application, the first voltage divider circuit 212 includes a first resistor, one end of the first resistor is connected to the first control end and the first collector, and the other end is connected to the first inflow end and the first power supply.

[0080] The first transistor 213 is used to control the opening and closing of the first switch 211. When the door needs to be opened forcibly, the microcontroller 23 will input a high level to the first base of the first transistor 213. At this time, the first transistor 213 is turned on. Since the first emitter is grounded, the voltage at the first collector is 0. Further, since the voltage across the first switch 211 is obtained by dividing the voltage of the first resistor, and the driving power supply 700 is 12V, a voltage of 12V is formed across the first resistor, which is greater than the turn-on voltage of the first switch 211, thereby turning on the first switch 211. When the door does not need to be opened forcibly, the microcontroller 23 will input a low level to the first base of the first transistor 213. At this time, the first transistor 213 cannot be turned on. Therefore, the voltage at the first collector is 12V, so that the voltage of the first control terminal and the first inflow terminal of the first switch 211 is substantially equal, and then the first switch 211 is turned off.

[0081] Furthermore, the high-side switch group 21 also includes a first anti-reverse diode 215, and the number of the first anti-reverse diodes 215 is multiple. One end of each first anti-reverse diode 215 is connected to the first switch 211, and the other end is connected to the motor 400 of any car door lock 500 or door handle 600.

[0082] In an embodiment of the present application, the first switch 211 needs to control multiple car door locks 500 and door handles 600 at the same time. Therefore, a first anti-reverse diode 215 needs to be added to each unlocking circuit to avoid the driving signal generated when controlling the car door lock 500 or the door handle 600 under normal circumstances affecting other car door locks 500 or door handles 600 that do not need to be activated.

[0083] In some embodiments, the high-side switch group 21 further includes a first zener diode 214 , a first anode of the first zener diode 214 is connected to the first control terminal, and a first cathode of the first zener diode 214 is connected to the first inflow terminal.

[0084] In this way, the first voltage regulator diode 214 is used to protect the first switch 211 , preventing the voltage applied between the first control terminal and the first inflow terminal of the first switch 211 from exceeding the specification and damaging the first switch 211 .

[0085] Specifically, a Zener diode, also known as a Zener diode or a reverse breakdown diode, is a semiconductor diode with special functions. Unlike ordinary diodes, a Zener diode is designed to work in a reverse breakdown state, but its breakdown is reversible, and in this state, it can exhibit a stable voltage characteristic, that is, when the current passing through it changes within a certain range, the voltage across its two ends can remain basically unchanged.

[0086] In the embodiment of the present application, the first voltage zener diode 214 is connected to both ends of the first switch 211 , and is mainly used to protect the first switch 211 , preventing the voltage applied to the first switch 211 from exceeding the specification and damaging the first switch 211 .

[0087] See also Figure 4 In some embodiments, the low-side switch group 22 includes a second switch 221, a second voltage divider circuit 222 and a second transistor 223, the second switch 221 includes a second control end, a second inflow end connected to the motor 400 and a second outflow end connected to the ground; it is connected between the motor 400 and the second control end, and the second voltage divider circuit 222 is connected in parallel between the second control end and the second inflow end; the second transistor 223 includes a second base connected to the microcontroller 23, a second collector connected to the voltage divider circuit and a second emitter connected to the ground.

[0088] In this way, the microcontroller 23 can control the on and off of the second switch 221 by inputting a high level to the second triode 223 , so as to form a complete unlocking driving loop.

[0089] Specifically, in the embodiment of the present application, the second switch 221 is a PMOS tube, and the second switch 221 is used as a power channel switch. The PMOS is a high-power device and can pass a current of 100A.

[0090] The second voltage divider circuit 222 includes a plurality of resistors and a plurality of capacitors, wherein the resistors play the role of current limiting and voltage dividing, and the capacitors play the role of filtering and energy storage. Specifically, the number of resistors and capacitors can be selected according to actual needs. In the embodiment of the present application, the second voltage divider circuit 222 includes a second resistor, one end of the second resistor is connected to the second control end and the second collector, and the other end is connected to the second inflow end and the second power supply.

[0091] The second triode 223 is used to control the opening and closing of the second switch 221. When the door needs to be opened forcibly, the microcontroller 23 will input a high level to the second base of the second triode 223. At this time, the second triode 223 is turned on. Since the second emitter is grounded, the voltage at the second collector is 0. Further, since the voltage across the second switch 221 is obtained by voltage division of the second resistor, and the driving power supply 700 is 12V, a voltage of 12V is formed across the second resistor, which is greater than the turn-on voltage of the second switch 221, thereby turning on the second switch 221. When the door does not need to be opened forcibly, the microcontroller 23 will input a low level to the second base of the second triode 223. At this time, the second triode 223 cannot be turned on. Therefore, the voltage at the second collector is 12V, so that the voltage of the second control terminal and the second inflow terminal of the second switch 221 is substantially equal, and then the second switch 221 is turned off.

[0092] Furthermore, the low-side switch group 22 also includes a second anti-reverse diode 225, and the number of the second anti-reverse diodes 225 is multiple. One end of each second anti-reverse diode 225 is connected to the first switch 211, and the other end is connected to the motor 400 of any car door lock 500 or door handle 600.

[0093] In an embodiment of the present application, the second switch 221 needs to control multiple car door locks 500 and door handles 600 at the same time. Therefore, a second anti-reverse diode 225 needs to be added to each unlocking circuit to avoid the driving signal generated when controlling the car door lock 500 or the door handle 600 under normal circumstances affecting other car door locks 500 or door handles 600 that do not need to be activated.

[0094] In some embodiments, the low-side switch group 22 further includes a second zener diode 224 , a second anode of the second zener diode 224 is connected to the second control terminal, and a second cathode of the second zener diode 224 is connected to the second inflow terminal.

[0095] In this way, the second voltage zener diode 224 is used to protect the second switch 221 , preventing the voltage applied between the second control terminal and the second inflow terminal of the second switch 221 from exceeding the specification and damaging the second switch 221 .

[0096] Specifically, in the embodiment of the present application, the second voltage zener diode 224 is connected to both ends of the second switch 221 , and is mainly used to protect the second switch 221 , preventing the voltage applied to the second switch 221 from exceeding the specification and damaging the second switch 221 .

[0097] See also Figure 5 In some embodiments, the microcontroller 23 is configured to control the high-side switch group 21 and the low-side switch group 22 to open so as to control the motor 400 to open the car door lock 500 when it is determined according to the message that the collision intensity reaches a preset intensity.

[0098] In this way, the vehicle door lock control system 100 can control the vehicle door lock 500 to open when a collision occurs and the collision intensity reaches a preset intensity.

[0099] Specifically, in the embodiment of the present application, after the vehicle 1000 is powered on, the central control circuit 20 is powered on, and the high-side switch group 21 and the low-side switch group 22 are closed by default; at this time, the central control circuit 20 detects the status of the message and collision signal of the CAN bus ECU300 in real time.

[0100] After the vehicle 1000 is hit by a collision, a collision signal is generated and transmitted to the left and right domain controllers 10 of the vehicle body, and a message is generated through the CAN bus ECU 300 and transmitted to the central control circuit 20. After the central control circuit 20 detects a valid message, it will determine whether the collision intensity reaches the preset intensity. If it reaches the preset intensity, the central control circuit 20 will directly control the high-side switch group 21 and the low-side switch group 22 to open to drive the door to unlock.

[0101] Furthermore, after the central control circuit 20 continues to unlock, it needs to be powered off and then powered on again to restore to the default state.

[0102] In some embodiments, the microcontroller 23 is configured to control the high-side switch group 21 and the low-side switch group 22 to open so as to control the motor 400 to open the car door lock 500 when it is determined that the collision intensity reaches a preset intensity according to the detection signal.

[0103] In this way, the automobile door lock control system 100 can control the automobile door lock 500 to open when the detection signal changes and the collision intensity reaches a preset intensity.

[0104] Specifically, in the embodiment of the present application, after the central control circuit 20 monitors the change of the collision signal in the message, it will determine whether the collision intensity reaches the set preset intensity. If it reaches it, the central control circuit 20 will directly control the high-side switch group 21 and the low-side switch group 22 to open to drive the car door to unlock.

[0105] In an embodiment of the present application, the central control circuit 20 performs redundant collision detection, that is, simultaneously detects the collision intensity in the collision signal in the message and the collision intensity when the collision signal changes. At this time, as long as one of them reaches the preset intensity, the central control circuit 20 will directly control the high-side switch group 21 and the low-side switch group 22 to open to drive the door to unlock, and the unlocking action will be performed.

[0106] In some embodiments, the microcontroller 23 is configured to control the high-side switch group 21 and the low-side switch group 22 to open so as to control the motor 400 to open the vehicle door lock 500 when the vehicle body left and right domain controllers 10 fail to unlock.

[0107] In this way, the car door lock control system can control the car door lock to open in other situations where the car door lock needs to be opened but is not opened normally.

[0108] Specifically, in an embodiment of the present application, when the vehicle 1000 is in normal use, after detecting a message request to unlock the door, if the left and right domain controllers 10 of the vehicle body fail to unlock, the microcontroller 23 can control the motor 400 to open the car door lock 500 to avoid the situation where the left and right domain controllers 10 of the vehicle body cannot open the door normally, resulting in people being trapped.

[0109] In some embodiments, the microcontroller 23 is configured to determine whether the vehicle body left and right domain controllers 10 have failed to unlock when receiving a door unlock message and not receiving a door unlock message from the left and right domains.

[0110] In this way, the vehicle door lock control system can determine whether the vehicle body left and right domain controllers 10 fail to unlock when the vehicle door lock needs to be opened but no unlocked door message is received.

[0111] Specifically, in the embodiment of the present application, when the vehicle 1000 is in normal use, after detecting the message demand for unlocking the door, the central control circuit 20 will continue to detect whether the left and right domain controllers 10 of the vehicle body have a corresponding unlocked door message output; if there is a message output, no action is required; if there is no message output, it is necessary to determine whether the left and right domain controllers 10 of the vehicle body have failed to unlock, so as to avoid the situation where the left and right domain controllers 10 of the vehicle body cannot open the door normally, resulting in people being trapped.

[0112] In some embodiments, the microcontroller 23 is configured to determine that the vehicle body left and right domain controller 10 has failed to unlock when receiving a vehicle body left and right domain fault message or the unlocking time exceeds a preset time.

[0113] In this way, the car door lock control system can control the car door lock to open in other situations where the car door lock needs to be opened but a fault occurs in the left or right domain of the car body or the unlocking time is too long.

[0114] Specifically, in the embodiment of the present application, when the vehicle 1000 is in normal use, after detecting the message requirement for unlocking the door, if the central control circuit 20 does not receive the door unlocking message, the central control circuit 20 will detect whether a fault code is issued by the left and right domain controllers 10 of the vehicle body. If a fault code of the left and right domain controllers 10 of the vehicle body is received or the unlocking time is overtime, it is determined that the left and right domain controllers 10 of the vehicle body have failed to unlock, and the microcontroller 23 will control the high-side switch group 21 and the low-side switch group 22 to open, driving the door to unlock.

[0115] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0116] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, unless otherwise clearly and specifically defined.

[0117] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A car door lock control system, characterized in that: include: The left and right domain controllers of the vehicle body are connected to the airbag ECU, the CAN bus and the motor of the car door lock of the vehicle, and are configured to control the motor to open the car door lock according to the detection signal of the airbag ECU and the message of the CAN bus; A central control circuit is connected to the airbag ECU, the CAN bus and the motor, and is configured to control the motor to open the vehicle door lock according to the detection signal and the message.

2. The automobile door lock control system according to claim 1, characterized in that: The vehicle includes a hidden door handle, and the left and right domain controllers of the vehicle body are configured to control the motor to drive the door handle to extend according to the detection signal of the airbag ECU and the message of the CAN bus; The central control circuit is configured to control the motor to drive the door handle to extend according to the detection signal and the message.

3. The automobile door lock control system according to claim 1, characterized in that: The central control circuit comprises: A high side switch group, wherein the high side switch group connects a driving power source and the motor; A low-side switch group, wherein the low-side switch group connects the motor and ground; A microcontroller is provided, wherein the microcontroller is connected to the high-side switch group and the low-side switch group, and controls the high-side switch group to connect the driving power supply and the motor, and the low-side switch group to connect the motor and the ground.

4. The automobile door lock control system according to claim 3, characterized in that: The high side switch group comprises: A first switch, the first switch comprising a first control end, a first inflow end connected to the driving power supply, and a first outflow end connected to the motor; A first voltage divider circuit is connected between the driving power supply and the first control terminal, and the first voltage divider circuit is connected in parallel between the first control terminal and the first inflow terminal; A first transistor includes a first base connected to the microcontroller, a first collector connected to the first voltage divider circuit, and a grounded first emitter.

5. The automobile door lock control system according to claim 4, characterized in that: The high side switch group further comprises: A first voltage-stabilizing diode, wherein a first anode of the first voltage-stabilizing diode is connected to the first control end, and a first cathode of the first voltage-stabilizing diode is connected to the first inflow end.

6. The automobile door lock control system according to claim 3, characterized in that: The low side switch group comprises: a second switch, the second switch comprising a second control terminal, a second inflow terminal connected to the motor, and a second outflow terminal connected to the ground; a second voltage-dividing circuit connected between the motor and the second control end, and the second voltage-dividing circuit is connected in parallel between the second control end and the second inflow end; The second transistor includes a second base connected to the microcontroller, a second collector connected to the voltage divider circuit, and a grounded second emitter.

7. The automobile door lock control system according to claim 6, characterized in that: The low side switch group further comprises: A second voltage-stabilizing diode, wherein a second anode of the second voltage-stabilizing diode is connected to the second control end, and a second cathode of the second voltage-stabilizing diode is connected to the second inflow end.

8. The automobile door lock control system according to claim 3, characterized in that: The microcontroller is configured to control the high-side switch group and the low-side switch group to open so as to control the motor to open the car door lock when it is determined according to the message that the collision intensity reaches a preset intensity.

9. The automobile door lock control system according to claim 3, characterized in that: The microcontroller is configured to control the high-side switch group and the low-side switch group to open so as to control the motor to open the vehicle door lock when it is determined according to the detection signal that the collision intensity reaches a preset intensity.

10. The automobile door lock control system according to claim 3, characterized in that: The microcontroller is configured to control the high-side switch group and the low-side switch group to control the motor to open the vehicle door lock when the left and right domain controllers of the vehicle body fail to unlock.

11. The automobile door lock control system according to claim 10, characterized in that: The microcontroller is configured to determine whether the vehicle body left and right domain controllers have failed to unlock when receiving a message for unlocking the vehicle doors and not receiving a message for unlocking the vehicle doors in the left and right domains.

12. The automobile door lock control system according to claim 11, characterized in that: The microcontroller is configured to determine that the unlocking of the left and right domain controllers of the vehicle body fails when a vehicle body left and right domain fault message is received or the unlocking time exceeds a preset time.

13. A vehicle, characterized in that: The invention comprises the automobile door lock control system as described in any one of claims 1 to 12.

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