Switch control circuit of vehicle front cabin cover lock and vehicle
By introducing a dual enable signal and driving circuit design into the switch control circuit of the front hatch lock of the vehicle, the problem of low safety in the prior art vehicle front hatch lock switch control is solved, and higher safety and reliability are achieved.
Patent Information
- Application Number
- CN202421906159.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The switch control of the existing vehicle front hatch lock is low, and it is easy to cause misunderstanding due to failure of a single drive switch or controller, reducing vehicle safety.
A switch control circuit for the front hatch lock of the vehicle is designed, and two enable signals are generated by the controller, which drives the first and second switch driving circuits respectively to ensure that the unlocking action of the front hatch lock of the vehicle is completed by the two driving circuits to avoid misunderstanding caused by a single point of failure.
Through this control circuit, misunderstandings caused by failure of a single drive switch or controller are avoided, and the safety of the front hatch lock of the vehicle is improved.
Smart Images
Figure CN222879471U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle control, in particular to a switch control circuit of a vehicle front hatch lock and a vehicle. Background Art
[0002] With the continuous evolution of automobile intelligence, electric configurations such as electric release door locks and electric suction door locks have appeared in car door locks. For electric vehicles, the front cabin space is relatively sufficient, and many models launched by OEMs are equipped with front cabin storage boxes. The traditional method of pulling the rope twice to unlock the front cabin lock requires opening the main driving door and then using force to pull the front cabin lock rope, which is inconvenient to use.
[0003] In the related art, an external power supply is used to provide power for the vehicle's front hood lock. In this method, the control chip outputs a control signal to enable the drive switch, and the unlocking and closing of the vehicle's front hood lock are determined by a single drive switch. When an unexpected failure such as a drive switch failure occurs, the vehicle's front hood lock is prone to malfunction and unlock, and the vehicle safety is reduced. Utility Model Content
[0004] In view of this, the utility model provides a switch control circuit of a vehicle hood lock and a vehicle, so as to solve the technical problem of low safety of the switch control of the existing vehicle hood lock.
[0005] The technical solution proposed by the utility model is as follows:
[0006] In a first aspect, the utility model provides a switch control circuit for a front hood lock of a vehicle, comprising: a controller, for generating a first enable signal and a second enable signal; a first switch drive circuit, wherein a control input end of the first switch drive circuit is connected to a first output end of the controller for receiving the first enable signal; a second switch drive circuit, wherein a control input end of the second switch drive circuit is connected to a second output end of the controller for receiving the second enable signal, a power input end of the second switch drive circuit is connected to an output end of the first switch drive circuit, and an output end of the second switch drive circuit is connected to a switch drive element of the front hood lock of the vehicle.
[0007] Optionally, the first switch driving circuit includes a high-side driving chip or a first relay.
[0008] Optionally, the second switch driving circuit includes an H-bridge driving chip or a second relay.
[0009] Optionally, the first switch driving circuit includes a high-side driving chip, and the second switch driving circuit includes an H-bridge driving chip. The control input end of the high-side driving chip is connected to the first output end of the controller, the control input end of the second switch driving circuit is connected to the second output end of the controller, the power input end of the H-bridge driving chip is connected to the output end of the high-side driving chip, and the output end of the H-bridge driving chip is connected to the switch driving component of the vehicle's front hood lock.
[0010] Optionally, a model of the high-side driver chip is TPS1HB08BQPWPRQ1.
[0011] Optionally, the model of the H-bridge driver chip is MPQ6612AGLE.
[0012] Optionally, the first switch drive circuit includes a first relay, and the second switch drive circuit includes a second relay, the control input end of the first relay is connected to the first output end of the controller, the normally closed end of the first relay is connected to the power supply output end, the normally open end of the first relay is connected to the normally closed end of the second relay, the control input end of the second relay is connected to the second output end of the controller, and the normally open end of the second relay is connected to the switch driver of the vehicle front hood lock.
[0013] Optionally, the switch control circuit of the vehicle hood lock further includes a trigger switch disposed outside the vehicle, and the trigger switch is connected to the controller.
[0014] Optionally, the switch driver is an unlocking motor of a vehicle hood lock.
[0015] A second aspect of the utility model provides a vehicle, comprising a switch control circuit of a vehicle hood lock as described in the first aspect of the utility model and any one of the first aspects.
[0016] It can be seen from the above technical solutions that the utility model has the following advantages:
[0017] The utility model provides a switch control circuit for a front hood lock of a vehicle and a vehicle. A first enabling signal and a second enabling signal are generated by a controller. When the first switch driving circuit receives the first enabling signal, the output end of the first driving circuit outputs a working voltage to the second switch driving circuit. After the second switch driving circuit is started, when the second enabling signal is received, the switch driving component of the front hood lock of the vehicle is controlled to work, so as to unlock the front hood lock of the vehicle. The unlocking of the front hood lock of the vehicle is driven by the cooperation of the first switch driving circuit and the second switch driving circuit, so as to avoid the front hood lock of the vehicle being mis-locked when unexpected failures such as single driving switch failure or controller failure occur, thereby improving the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly express the technical solution of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0019] Figure 1 It is a structural schematic diagram of a switch control circuit of a vehicle front hood lock in an embodiment of the utility model;
[0020] Figure 2 It is a structural schematic diagram of another switch control circuit of a vehicle front hood lock in an embodiment of the utility model;
[0021] Figure 3 It is a structural schematic diagram of a switch control circuit of a vehicle front hood lock in another embodiment of the utility model;
[0022] Figure 4 for Figure 3 A partial enlarged view of the middle A part;
[0023] Figure 5 for Figure 4 A partial enlarged view of the middle B part;
[0024] Figure 6 This is an application flow chart of the switch control circuit of the vehicle front hood lock in the embodiment of the utility model;
[0025] Figure 7 The present invention is a schematic structural diagram of a switch control circuit of a vehicle hood lock in another embodiment of the present invention.
[0026] Reference numerals:
[0027] 100 - controller; 200 - first switch driving circuit; 300 - second switch driving circuit; 400 - switch driving element; U27 - high-side driving chip; U21 - H-bridge driving chip; Relay1 - first relay; Relay2 - second relay. DETAILED DESCRIPTION
[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] In the description of the present invention, it should be noted that the terms "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0032] The embodiment of the utility model provides a switch control circuit of a vehicle front hood lock, which can be applied to various types of vehicles such as gasoline vehicles, gasoline-electric hybrid vehicles, electric vehicles, etc., and is particularly suitable for electric vehicles.
[0033] like Figure 1 As shown, the switch control circuit of the front hood lock of the vehicle includes: a controller 100, which is used to generate a first enable signal and a second enable signal; a first switch drive circuit 200, wherein the control input end of the first switch drive circuit 200 is connected to the first output end of the controller 100, and is used to receive the first enable signal; a second switch drive circuit 300, wherein the control input end of the second switch drive circuit 300 is connected to the second output end of the controller 100, and is used to receive the second enable signal, the power input end of the second switch drive circuit 300 is connected to the output end of the first switch drive circuit 200, and the output end of the second switch drive circuit 300 is connected to the switch drive member 400 of the front hood lock of the vehicle.
[0034] Specifically, the controller 100 may be a single-chip microcontroller unit (MCU) or a field programmable gate array (FPGA).
[0035] Exemplarily, the controller 100 uses a Renesas RH85 / U2A16 series MCU controller, model R7F702300EBBG.
[0036] The switch driving member 400 may be a driving motor or a cylinder.
[0037] It should be understood that when the front hood lock of the vehicle needs to be unlocked, the controller 100 generates the first enable signal and the second enable signal. The unlocking condition for the controller 100 to determine whether to generate the first enable signal and the second enable signal is to determine whether a correct key signal, mobile phone signal, voice signal or fingerprint signal or other identification signal is detected after receiving a trigger switch, a remote opening control command or a voice opening control command. For example, when a radio frequency signal emitted by a bound mobile phone or key is detected, it is determined that the authentication is successful and the first enable signal and the second enable signal are generated. The first enable signal and the second enable signal are output through the first output terminal and the second output terminal of the controller 100 respectively.
[0038] The first switch driving circuit 200 and the second switch driving circuit 300 may be driven by a switch chip or a relay.
[0039] When there is no need to open the hood lock, the controller 100 does not output the first enable signal and the second enable signal. The first switch drive circuit 200 does not output voltage due to not receiving the first enable signal, and the second switch drive circuit 300 does not work due to power failure, thereby preventing the second switch drive chip from accidentally driving externally due to abnormal status or failure of the controller 100, resulting in unexpected driving of the hood lock.
[0040] When the front hood lock needs to be opened, the first switch driving circuit 200 provides a working voltage to the power input terminal of the second switch driving circuit 300 after receiving the first enable signal, and the second switch driving circuit 300 is started. At the same time, the controller 100 outputs a second enable signal to the second switch driving circuit 300, controls the second switch driving circuit 300 to output as expected, and controls the switch driving member 400 of the front hood lock of the vehicle to perform the unlocking action.
[0041] The switch control circuit of the vehicle hood lock of the embodiment of the utility model generates a first enable signal and a second enable signal through the controller 100. When the first switch drive circuit 200 receives the first enable signal, the output end of the first drive circuit outputs a working voltage to the second switch drive circuit 300. After the second switch drive circuit 300 is started, when the second switch drive circuit 300 receives the second enable signal, it controls the switch drive member 400 of the vehicle hood lock to work and unlock the vehicle hood lock. The first switch drive circuit 200 and the second switch drive circuit 300 cooperate to drive the unlocking of the vehicle hood lock, thereby avoiding the situation in which the vehicle hood lock is mistakenly locked when a single drive switch fails or the controller 100 fails, etc., thereby improving the vehicle safety.
[0042] In some embodiments of the present invention, the first switch driving circuit 200 includes a high-side driving chip U27 or a first relay Relay1 , and the second switch driving circuit 300 includes an H-bridge driving chip U21 or a second relay Relay2 .
[0043] Furthermore, if Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the first switch driving circuit 200 includes a high side drive (HighSide Drive, HSD) chip, and the second switch driving circuit 300 includes an H-bridge driving chip U21. The control input end of the high side drive chip U27 is connected to the first output end of the controller 100, the control input end of the second switch driving circuit 300 is connected to the second output end of the controller 100, the power input end of the H-bridge driving chip U21 is connected to the output end of the high side drive chip U27, and the output end of the H-bridge driving chip U21 is connected to the switch driving component 400 of the vehicle front hood lock.
[0044] Specifically, the model of the high-side driver chip U27 is TPS1HB08BQPWPRQ1, and the model of the H-bridge driver chip U21 is MPQ6612AGLE.
[0045] Furthermore, the controller 100 uses an MCU controller, model R7F702300EBBG. The switch driver 400 is an unlocking motor of the vehicle front hood lock. The first output end of the MCU controller is the DO1 pin, and the second output end includes the DO1 pin, the DO2 pin and the DO3 pin.
[0046] In one example, the MCU controller and the high-side driver chip U27 may be powered by a vehicle external battery.
[0047] When the hood lock does not need to be opened, the DO1 pin of the MCU controller does not output the first enable signal, and the DO2 pin, DO3 pin and DO4 pin do not output the second enable signal. The high-side driver chip U27 does not output voltage because the EN pin does not receive the first enable signal, and the H-bridge driver chip U21 does not work when powered off, thereby preventing the H-bridge driver chip U21 from accidentally driving externally due to abnormal status or failure of the controller 100, resulting in unexpected driving of the hood lock.
[0048] When the front hood lock needs to be opened, the high-side driver chip U27 provides a working voltage to the power input terminal of the H-bridge driver chip U21 after receiving the first enable signal, and the H-bridge driver chip U21 starts. At the same time, the MCU outputs a second enable signal to the control input terminal of the H-bridge driver chip U21 through the DO2 pin, the DO3 pin, and the DO4 pin, controls the H-bridge driver chip U21 to output as expected, and controls the unlocking motor of the vehicle's front hood lock to perform the unlocking action.
[0049] In consideration of functional safety and driving safety, the embodiment of the utility model sets a high-side driver chip U27 to ensure that the H-bridge driver chip U21 is not powered when in a non-operating state, thereby preventing the front hood lock from being unlocked by mistake due to unexpected failure of the H-bridge driver chip U21. At the same time, the first switch driver circuit 200 and the second switch driver circuit 300 are both chip controlled, which is small in size and easy to control.
[0050] Furthermore, the switch control circuit of the vehicle hood lock also includes a trigger switch arranged outside the vehicle, and the trigger switch is connected to the controller 100 .
[0051] Specifically, the trigger switch can be a push switch or a touch switch. Taking the push switch as an example, when the trigger switch is pressed, the authentication action is triggered. When the correct key signal, mobile phone signal, voice signal, face information or fingerprint signal or other identification signal is detected, the authentication is successful, and the switch pressing request is responded to and the first enable signal and the second enable signal are output. If the authentication is unsuccessful, the switch pressing request will not be responded to.
[0052] An application flow of the switch control circuit of the vehicle front hood lock of the utility model embodiment is as follows Figure 6As shown, when the effective pressing of the trigger switch is detected, the authentication action is triggered. When the authentication is successful, the first enable signal and the second enable signal are output to drive the high-side driver chip U27 and the H-bridge driver chip U21 respectively, and the output feedback of the high-side driver chip U27 and the H-bridge driver chip U21 are detected respectively, and the operation status is fed back to the mobile phone or the key end. After the detection is correct, the front hood lock is driven to unlock through the H-bridge driver chip U21. After the front hood lock is unlocked, the output of the first enable signal and the second enable signal is stopped, and the output signals of the high-side driver chip U27 and the H-bridge driver chip U21 are judged to be normal through periodic detection, and the circuit is monitored to detect circuit abnormalities in time.
[0053] The embodiment of the utility model sets the trigger switch outside the vehicle, so that the front hood lock can be opened without the owner opening the door, which is convenient to operate. It can also cooperate with a variety of authentication methods such as key, mobile phone or voice to improve the diversity and security of authentication.
[0054] In some embodiments of the present invention, Figure 7 As shown, the first switch driving circuit 200 includes a first relay Relay1, and the second switch driving circuit 300 includes a second relay Relay2. The control input end of the first relay Relay1 is connected to the first output end of the controller 100, the normally closed end of the first relay Relay1 is connected to the power output end BAT, the normally open end of the first relay Relay1 is connected to the normally closed end of the second relay Relay2, the control input end of the second relay Relay2 is connected to the second output end of the controller 100, and the normally open end of the second relay Relay2 is connected to the switch driving component 400 of the vehicle front hood lock.
[0055] Specifically, the power output terminal BAT is an external power source such as a positive electrode of a battery. The first relay Relay1 and the second relay Relay2 can be solid relays, reed relays, polarized relays, etc. The controller 100 is an MCU controller, model R7F702300EBBG.
[0056] When the hood lock does not need to be opened, the DO1 pin of the controller 100 does not output the first enable signal, and the DO2 pin does not output the second enable signal. Since the first relay Relay1 does not receive the first enable signal, the switch is disconnected, so the normally open end and the normally closed end of the first relay Relay1 are not conductive, and the second relay Relay2 does not work due to no working voltage, and cannot control the unlocking electrolytic action, thereby preventing the second relay Relay2 from being accidentally driven externally due to abnormal status or failure of the controller 100, resulting in unexpected driving of the hood lock.
[0057] When the front hood lock needs to be opened, the DO1 pin of the controller 100 outputs the first enabling signal. After receiving the first enabling signal, the first relay Relay1 closes the switch, the normally open end and the normally closed end of the first relay Relay1 are turned on, and the power output end BAT increases the working voltage for the second relay Relay2. At the same time, the controller 100 outputs the second enabling signal to the second relay Relay2 through the DO2 pin, and the unlocking motor of the vehicle's front hood lock is controlled by the second relay Relay2 to move in an orderly manner, thereby opening the front hood lock.
[0058] According to the embodiment of the utility model, only when the first relay Relay1 is controlled to be turned on can the second relay Relay2 be logically controlled to be turned on, thereby controlling the operation of the unlocking motor to avoid false locking caused by failure of the controller 100 or malfunction of the second relay Relay2. At the same time, since both the first switch drive circuit 200 and the second switch circuit use relays, the circuit safety is better.
[0059] An embodiment of the utility model further provides a vehicle, comprising a switch control circuit of a vehicle hood lock according to any one of the above embodiments.
[0060] It should be understood that the vehicle of the present invention can be various types of vehicles, for example, it can be various purpose vehicles such as buses and trucks, and it can also be various energy-driven vehicles such as gasoline vehicles, hybrid vehicles, electric vehicles, etc.
[0061] A vehicle according to an embodiment of the utility model generates a first enable signal and a second enable signal through a controller 100. When the first switch drive circuit 200 receives the first enable signal, the output end of the first drive circuit outputs a working voltage to the second switch drive circuit 300. After the second switch drive circuit 300 is started, when the second switch drive circuit 300 receives the second enable signal, it controls the switch drive member 400 of the vehicle's front bonnet lock to work and unlock the vehicle's front bonnet lock. The first switch drive circuit 200 and the second switch drive circuit 300 cooperate to drive the unlocking of the vehicle's front bonnet lock, thereby avoiding the situation in which the vehicle's front bonnet lock is mistakenly locked when an unexpected failure such as a single drive switch failure or a controller 100 failure occurs, thereby improving vehicle safety.
[0062] Although example embodiments and their advantages have been described in detail, those skilled in the art may make various changes, substitutions and modifications to these embodiments without departing from the spirit of the present invention and the scope of protection defined by the appended claims, and such modifications and variations shall all fall within the scope defined by the appended claims.
Claims
1. A switch control circuit for a vehicle front hood lock, characterized in that: include: A controller (100), configured to generate a first enable signal and a second enable signal; A first switch driving circuit (200), wherein a control input terminal of the first switch driving circuit (200) is connected to a first output terminal of the controller (100) and is used to receive the first enable signal; A second switch drive circuit (300), wherein a control input end of the second switch drive circuit (300) is connected to a second output end of the controller (100) and is used to receive the second enable signal, a power input end of the second switch drive circuit (300) is connected to an output end of the first switch drive circuit (200), and an output end of the second switch drive circuit (300) is connected to a switch drive element (400) of a front hood lock of the vehicle.
2. The switch control circuit of the vehicle hood lock according to claim 1, characterized in that: The first switch driving circuit (200) comprises a high-side driving chip (U27) or a first relay (Relay1).
3. The switch control circuit of the vehicle hood lock according to claim 1, characterized in that: The second switch driving circuit (300) comprises an H-bridge driving chip (U21) or a second relay (Relay2).
4. The switch control circuit of the vehicle hood lock according to claim 1, characterized in that: The first switch drive circuit (200) comprises a high-side drive chip (U27), the second switch drive circuit (300) comprises an H-bridge drive chip (U21), the control input end of the high-side drive chip (U27) is connected to the first output end of the controller (100), the control input end of the second switch drive circuit (300) is connected to the second output end of the controller (100), the power input end of the H-bridge drive chip (U21) is connected to the output end of the high-side drive chip (U27), and the output end of the H-bridge drive chip (U21) is connected to a switch drive component (400) of a front hood lock of a vehicle.
5. The switch control circuit of the vehicle hood lock according to claim 4, characterized in that: The model of the high-side driver chip (U27) is TPS1HB08BQPWPRQ1.
6. The switch control circuit of the vehicle hood lock according to claim 4, characterized in that: The model of the H-bridge driver chip (U21) is MPQ6612AGLE.
7. The switch control circuit of the vehicle hood lock according to claim 1, characterized in that: The first switch drive circuit (200) comprises a first relay (Relay1), and the second switch drive circuit (300) comprises a second relay (Relay2); a control input end of the first relay (Relay1) is connected to a first output end of the controller (100), a normally closed end of the first relay (Relay1) is connected to a power supply output end, a normally open end of the first relay (Relay1) is connected to a normally closed end of the second relay (Relay2), a control input end of the second relay (Relay2) is connected to a second output end of the controller (100), and a normally open end of the second relay (Relay2) is connected to a switch drive element (400) of a front hood lock of a vehicle.
8. The switch control circuit of the vehicle hood lock according to claim 1, characterized in that: It also includes a trigger switch arranged outside the vehicle, and the trigger switch is connected to the controller (100).
9. The switch control circuit of the vehicle hood lock according to claim 1, characterized in that: The switch driving member (400) is an unlocking motor of a vehicle front hood lock.
10. A vehicle, characterized in that: A switch control circuit comprising a vehicle hood lock as described in any one of claims 1 to 9.