Drive control circuit and vehicle

Abstract

The invention discloses a driving control circuit and a vehicle, and relates to the technical field of vehicles. The driving control circuit comprises a driving module; the control module is connected with the input end of the driving module and is used for providing a control signal for the input end of the driving module in a fault-free state so as to control the output end of the driving module to output an enable signal or a disable signal; the switch module is connected with the output end of the driving module and the function module, and is used for conducting under the condition that the output end of the driving module outputs an enable signal to control the function module to be in a working state, and conducting off under the condition that the output end of the driving module outputs a non-enable signal to control the function module to be in a non-working state; and the self-locking module is connected with the output end of the driving module and is used for maintaining the output end of the driving module to output the enable signal under the condition that the output end of the driving module outputs the enable signal. According to the embodiment of the invention, when the control module of the vehicle is in the fault state, normal driving of a driver is facilitated.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular, relates to a drive control circuit and a vehicle. Background Art

[0002] With the development of science and technology, vehicles have gradually become a common means of transportation in people's lives.

[0003] In the related art, when the micro control unit (MCU) of the vehicle is in an abnormal or faulty state, functional modules such as the wiper motor and ignition switch of the vehicle stop working, causing the driver to be unable to drive normally. Summary of the invention

[0004] The embodiments of the present application provide a drive control circuit and a vehicle, which can help a driver to drive normally when a control module of the vehicle is in a fault state.

[0005] In a first aspect, an embodiment of the present application provides a drive control circuit, the drive control circuit comprising:

[0006] Driver module;

[0007] A control module connected to the input end of the driving module, and used to provide a control signal to the input end of the driving module in a fault-free state, so as to control the output end of the driving module to output an enable signal or a disable signal;

[0008] A switch module is connected to the output end of the driving module and the functional module, and is used to be turned on when the output end of the driving module outputs an enable signal to control the functional module to be in a working state, and is turned off when the output end of the driving module outputs a disable signal to control the functional module to be in a non-working state;

[0009] The self-locking module is connected to the output end of the driving module and is used to maintain the output end of the driving module outputting the enable signal when the output end of the driving module outputs the enable signal.

[0010] In some optional implementations of the first aspect, the input end of the driving module includes a first input end, the control signal includes a first control signal and a second control signal, when the first input end is connected to the first control signal, the output end of the driving module outputs an enable signal, and when the first input end is connected to the second control signal, the output end of the driving module outputs a disable signal;

[0011] The self-locking module is also connected to the first input end. When the output end of the driving module outputs an enable signal, the self-locking module controls the first input end to access the first control signal to maintain the output end of the driving module outputting the enable signal.

[0012] In some optional embodiments of the first aspect, the self-locking module includes a first switch submodule, a control end of the first switch submodule is connected to the output end of the driving module, and when the output end of the driving module outputs an enable signal, the first switch submodule is turned on to control the first input end to access the first control signal.

[0013] In some optional embodiments of the first aspect, the self-locking module further includes a voltage divider module, the voltage divider module and the first switch submodule are connected in series between the first power supply and the ground terminal, and the voltage divider node of the voltage divider module is connected to the first input terminal.

[0014] In some optional implementations of the first aspect, the first switch submodule includes a PNP transistor or a P-type MOS transistor;

[0015] And / or, the voltage dividing submodule includes a first resistor and a second resistor, the first resistor and the second resistor are connected in series, and the voltage dividing node is located between the first resistor and the second resistor.

[0016] In some optional implementations of the first aspect, the input end of the driving module includes a first input end, the control signal includes a first control signal and a second control signal, when the first input end is connected to the first control signal, the output end of the driving module outputs an enable signal, and when the first input end is connected to the second control signal, the output end of the driving module outputs a disable signal;

[0017] The drive control circuit also includes a lock clearing module connected between the control module and the first input terminal and used for controlling the first input terminal to access the second control signal.

[0018] In some optional implementations of the first aspect, the control module includes a first control end and a second control end, the first control end is connected to the first input end,

[0019] The unlocking module includes a second switch submodule, a control end of the second switch submodule is connected to a second control end, a first end of the second switch submodule is connected to the first input end, and a second end of the second switch submodule is connected to the ground end.

[0020] In some optional implementations of the first aspect, the second switch submodule includes an NPN transistor or an N-type MOS transistor.

[0021] In some optional implementations of the first aspect, the drive control circuit further includes a reset module, the reset module is connected between the control end and the ground end of the second switch submodule, and the reset module is used to provide a reset signal to the control end of the second switch submodule;

[0022] And / or, the drive control circuit further includes a first current limiting module, and the first current limiting module is connected between the second control end and the lock clearing module.

[0023] In some optional implementations of the first aspect, the reset module includes a third resistor, and / or the first current limiting module includes a fourth resistor.

[0024] In some optional embodiments of the first aspect, the input end of the driving module includes a first input end, the control module includes a first control end, the driving control circuit also includes a unidirectional conduction module, the unidirectional conduction module is connected between the first control end and the first input end, and the unidirectional conduction module is used to control the current to flow from the first control end to the first input end; the driving control circuit also includes a second current limiting module, and the second current limiting module is connected between the first control end and the unidirectional conduction module.

[0025] In some optional implementations of the first aspect, the unidirectional conduction module includes a diode, and / or the second current limiting module includes a fifth resistor.

[0026] In some optional embodiments of the first aspect, the switch module includes a relay.

[0027] Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a vehicle, the vehicle comprising a functional module and the drive control circuit of the first aspect, wherein the functional module is connected between the drive control circuit and a ground terminal.

[0028] According to the drive control circuit and vehicle provided by the embodiment of the present application, when the control module is in an abnormal or faulty state, the self-locking module can maintain the output of the drive module outputting the enable signal when the output of the drive module outputs the enable signal, so that the switch module is turned on under the control of the enable module, and then the function module can be controlled to be in a working state. That is to say, in the embodiment of the present application, when the control module is in an abnormal or faulty state, the driver can use the function module normally, which helps the driver to drive normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 is a structural schematic diagram of a drive control circuit provided in an embodiment of the present application;

[0031] Figure 2 is another structural schematic diagram of a drive control circuit provided in an embodiment of the present application;

[0032] Figure 3 It is a structural schematic diagram of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0035] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0036] In the related art, the microcontroller unit can control the driver chip to be in an enabled state or a disabled state through digital signals, and the driver chip can drive the operation and non-operation of functional modules such as the wiper motor and the ignition switch according to the control instructions issued by the microcontroller unit.

[0037] The inventors have found through extensive research that when the microcontroller unit is abnormal or faulty, the vehicle's wiper motor, ignition switch and other functional modules stop working, causing the driver to be unable to drive normally. For example, when the vehicle is driving on a rainy day, when the microcontroller unit is abnormal or faulty, it is impossible to ensure that the wiper motor is always in a working state. When the wiper motor is not working, the driver cannot see the road conditions in front of the vehicle clearly and cannot drive normally, which may affect driving safety.

[0038] In order to solve the problem in the related art that when the microcontroller unit of the vehicle is abnormal or fails, the functional modules such as the wiper motor and the ignition switch of the vehicle stop working, causing the driver to be unable to drive normally, the embodiment of the present application provides a drive control circuit and a vehicle. The drive control circuit provided by the embodiment of the present application is first introduced below.

[0039] Figure 1 A structural schematic diagram of a drive control circuit provided in an embodiment of the present application is shown.

[0040] like Figure 1 As shown, the driving control circuit 100 may include a driving module 10 , a control module 20 , a switch module 30 and a self-locking module 40 .

[0041] The driving module 10 may include a low-side driving chip and a high-side driving chip. The low-side driving chip may be a controllable switch added to the power supply terminal of the chip; the high-side driving chip may be a controllable switch added to the ground terminal of the chip.

[0042] Exemplarily, the driving module 10 may be a low-side driving chip of model number TLE 75602.

[0043] The low-side driver chip can be powered by two parts, one part is digital power supply, that is, the 5V voltage output by the power management integrated circuit (PowerManagement IC, PMIC) is powered, and the other part is chip analog power supply, that is, the first power supply Vi is powered. The first power supply Vi may include a vehicle-mounted battery. For example, Figure 2 As shown, the VDD terminal of the driving module 10 can be connected to a 5V voltage, and the VS terminal of the driving module 10 can be connected to a first power source Vi.

[0044] The control module 20 may be connected to the input end of the driving module 10. The control module 20 may be used to provide a control signal to the input end of the driving module 10 in a non-fault state, so as to control the output end of the driving module 10 to output an enable signal or a disable signal.

[0045] The control module 20 may be a micro control unit.

[0046] For example, the model of the control module 20 may be TC389, TC397, etc., of the TC3XX series. The VDDM terminal of the control module 20 may be connected to a voltage of 5V.

[0047] The switch module 30 can be electrically connected to the output end of the driving module 10 and the functional module 200. The switch module 30 can be used to be turned on when the output end of the driving module 10 outputs an enable signal to control the functional module 200 to be in a working state. The switch module 30 can also be used to be turned off when the output end of the driving module 10 outputs a non-enable signal to control the functional module 200 to be in a non-working state.

[0048] In some optional embodiments, such as Figure 2 As shown, the switch module 30 may be a relay K1. The relay K1 may include a coil and a contact disposed between the functional module 200 and the first power source Vi. One end of the coil is connected to the first power source Vi, the other end of the coil is connected to the output end of the driving module 10, one end of the contact is connected to the first power source Vi, and the other end of the contact is connected to the functional module 200. When the driving module 10 outputs an enable signal, the coil is energized, the contact is closed, and the functional module 200 is connected to the first power source Vi, so that the functional module 200 is in a working state. When the driving module 10 outputs an enable signal, the coil is de-energized, the contact is disconnected, and the functional module 200 is not connected to the first power source Vi, so that the functional module 200 is in a non-working state.

[0049] The functional module 200 may include a wiper motor and an ignition switch of the vehicle, etc. When the functional module 200 is a wiper motor, the functional module 200 may be in a working state for the wiper to perform a wiper action, and the functional module 200 may be in a non-working state for the wiper to stop performing a wiper action.

[0050] The enable signal may be a signal that can turn on the switch module 30. For example, the enable signal is a low level signal.

[0051] The disable signal may be a signal that can turn off the switch module 30. For example, the disable signal is a high level signal.

[0052] The self-locking module 30 can be connected to the output end of the driving module 10, and can be used to maintain the output end of the driving module 10 outputting the enable signal when the output end of the driving module 10 outputs the enable signal. Then the switch module 30 is turned on to control the functional module 200 to be in a working state.

[0053] It is understandable that, when the control module 20 is in an abnormal or faulty state, the self-locking module 40 can maintain the output terminal OUT of the driving module 10 outputting the enable signal when the output terminal OUT of the driving module 10 outputs the enable signal, so that the switch module 30 is turned on under the control of the enable module, and then the function module 200 can be controlled to be in a working state. That is to say, in the embodiment of the present application, when the control module 20 is in an abnormal or faulty state, the driver can use the function module 200 normally, which helps the driver to drive normally.

[0054] In some optional embodiments, such as Figure 2 As shown, the input end of the driving module 10 may include a first input end IN, the control signal may include a first control signal and a second control signal, and when the first input end IN is connected to the first control signal, the output end OUT of the driving module 10 outputs an enable signal, and when the first input end IN is connected to the second control signal, the output end OUT of the driving module 10 outputs a disable signal.

[0055] Optionally, the first control signal may be a high level signal, and the second control signal may be a low level signal.

[0056] Exemplarily, the driving module 10 is a low-side driving chip. When the first input terminal IN of the low-side driving chip outputs a low-level signal, the output terminal OUT of the low-side driving chip outputs a high-level signal. When the first input terminal IN of the low-side driving chip outputs a high-level signal, the output terminal OUT of the low-side driving chip outputs a low-level signal.

[0057] The self-locking module 40 can also be connected to the first input terminal IN. The self-locking module 40 can be used to control the first input terminal IN to access the first control signal when the output terminal OUT of the driving module 10 outputs the enable signal, so as to maintain the output terminal OUT of the driving module 10 outputting the enable signal. In this way, the control logic of the control circuit of the driving module 10 can be used to make the output terminal OUT of the driving module 10 maintain the output of the enable signal, so that the switch module 30 is turned on under the control of the enable module, and then the functional module 200 can be controlled to be in a working state.

[0058] In some optional embodiments, such as Figure 2 As shown, the self-locking module 40 may include a first switch submodule 41, and the control end of the first switch submodule 41 is connected to the output end OUT of the driving module 10. When the output end OUT of the driving module 10 outputs an enable signal, the first switch submodule 41 is turned on to control the first input end IN to access the first control signal.

[0059] Optionally, a first end of the first switch submodule 41 is connected to the first power source Vi, and a second end of the first switch submodule 41 is connected to the first input end IN of the driving module 10 .

[0060] Exemplarily, the first switch submodule 41 may include a PNP transistor or a P-type MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) tube, etc.

[0061] It is understandable that the cost of a PNP transistor is lower than that of a P-type MOS transistor. Therefore, when the first switch submodule 41 is a PNP transistor, the cost of the driving control circuit 100 can be reduced.

[0062] For example, Figure 2 As shown, the first switch submodule 41 may include a PNP transistor Q1. The base of the PNP transistor Q1 may be connected to the output terminal OUT of the driving module 10, the emitter of the PNP transistor Q1 may be connected to the first power supply Vi, and the collector of the PNP transistor Q1 may be connected to the first input terminal IN of the driving module 10. Among them, the control end of the first switch submodule 41 may be the base of the PNP transistor Q1, the first end of the first switch submodule 41 may be the emitter of the PNP transistor Q1, and the second end of the first switch submodule 41 may be the collector of the PNP transistor Q1.

[0063] In some optional embodiments, such as Figure 2As shown, the self-locking module 40 may further include a voltage dividing submodule 42, the voltage dividing submodule 42 and the first switch submodule 41 are connected in series between the first power source Vi and the ground terminal GND, and the voltage dividing node N1 of the voltage dividing submodule 42 is connected to the first input terminal IN.

[0064] In this embodiment, a voltage divider submodule 42 is provided between the first power source Vi and the ground terminal GND to avoid the problem that the voltage at the voltage dividing node N1 is too high, which causes the voltage connected to the first input terminal IN to be too high and thus damages the driving module 10, that is, to protect the driving module 10.

[0065] For example, the voltage dividing submodule 42 may include a first resistor R1 and a second resistor R2 , the first resistor R1 and the second resistor R2 are connected in series, and the voltage dividing node may be located between the first resistor R1 and the second resistor R2 .

[0066] The resistance values ​​of the first resistor R1 and the second resistor R2 can be set according to actual conditions and are not limited here. For example, the resistance value of the first resistor R1 can be 33KΩ, and the resistance value of the second resistor R2 can be 47KΩ.

[0067] It is understandable that the first resistor R1 is connected between the ground terminal GND and the first input terminal IN, and the first resistor R1 can also provide a signal of the ground terminal GND to the first output terminal OUT to reset the potential of the first input terminal IN. The larger the resistance of the first resistor R1, the more stable the potential of the first input terminal IN.

[0068] In some optional embodiments, such as Figure 2 As shown, the input end of the driving module 10 may include a first input end IN, the control signal may include a first control signal and a second control signal, when the first input end IN is connected to the first control signal, the output end OUT of the driving module 10 outputs an enable signal, and when the first input end IN is connected to the second control signal, the output end OUT of the driving module 10 outputs a disable signal;

[0069] The driving control circuit 100 may further include a lock clearing module 50 connected between the control module 20 and the first input terminal IN, and configured to control the first input terminal IN to receive the second control signal.

[0070] In this embodiment, by setting the unlocking module 50, the first input terminal IN of the control driving module 10 is connected to the second control signal, so that the output terminal OUT of the driving module 10 outputs a non-enable signal, thereby turning off the switch module 30, thereby controlling the functional module 200 to be in a non-working state.

[0071] Exemplarily, the unlocking module 50 connects a low level signal to the first input terminal IN of the driving module 10 so that the output terminal OUT of the driving module 10 outputs a high level signal, and then the relay K1 is turned off under the control of the high level signal, and the wiper motor is in a non-working state.

[0072] In some optional embodiments, such as Figure 2 As shown, the control module 20 may include a first control terminal COL1 and a second control terminal COL2, the first control terminal COL1 may be connected to the first input terminal IN, the unlocking module 50 may include a second switch submodule 51, the control end of the second switch submodule 51 is connected to the second control terminal COL2, the first end of the second switch submodule 51 is connected to the first input terminal IN, and the second end of the second switch submodule 51 is connected to the ground terminal GND.

[0073] Exemplarily, the second switch submodule 51 may include an NPN transistor or an N-type MOS transistor.

[0074] It is understandable that the cost of an NPN transistor is lower than that of an N-type MOS transistor. Therefore, when the second switch submodule 51 is an NPN transistor, the cost of the driving control circuit 100 can be reduced.

[0075] Exemplarily, the base of the NPN transistor Q2 is connected to the second control terminal COL2, the collector of the NPN transistor Q2 is connected to the first input terminal IN, and the emitter of the NPN transistor Q2 is connected to the ground terminal GND. Among them, the control end of the second switch submodule 51 can be the base of the NPN transistor Q2, the first end of the second switch submodule 51 can be the collector of the NPN transistor Q2, and the second end of the second switch submodule 51 can be the emitter of the NPN transistor Q2.

[0076] It should be noted that the priority of the unlocking module 50 is higher than that of the self-locking module 40. That is, when the self-locking module 40 outputs a high level signal and the unlocking module 50 outputs a low level signal, the signal connected to the first input terminal IN is a high level signal.

[0077] In some optional embodiments, such as Figure 2 As shown, the driving control circuit 100 may further include a reset module 60, which may be connected between the control end of the second switch submodule 51 and the ground end GND, and the reset module 60 may be used to provide a reset signal for the control end of the second switch submodule 51. In other words, the signal on the ground end GND may be transmitted to the control end of the second switch submodule 51 through the reset module 60 to reset the potential of the control end of the second switch submodule 51.

[0078] Optionally, the reset module 60 may include a third resistor R3. The resistance of the third resistor R3 may be set according to actual conditions and is not limited here. For example, the resistance of the third resistor R3 may be 10KΩ.

[0079] It is understandable that the greater the resistance of the third resistor R3 is, the more stable the potential of the control terminal of the second switch submodule 51 is.

[0080] In some optional embodiments, such as Figure 2 As shown, the drive control circuit 100 may further include a first current limiting module 70, and the first current limiting module 70 may be connected between the second control terminal COL2 and the clearing module 50. In this way, the current from the second control terminal COL2 to the clearing module 50 may be controlled by the first current limiting module 70, thereby helping to prevent the current flowing through the clearing module 50 from being too large, so as to protect the clearing module 50.

[0081] Optionally, the first current limiting module 70 may be connected between the second control terminal COL2 and the control terminal of the second switch submodule 51. The specific position of the first current limiting module 70 may be set according to actual conditions, and only needs to be between the second control terminal COL2 and the control terminal of the second switch submodule 51. Figure 2 As shown, the first current limiting module 70 can be located between the node N2 and the clearing module 50, or between the node N2 and the second control terminal COL2. It is understandable that when the first current limiting module 70 is located between the node N2 and the second control terminal COL2, the reset module 60 and the first current limiting module 70 can play a role of voltage division together.

[0082] For example, the first current limiting module 70 may include a fourth resistor R4. The resistance of the fourth resistor R4 may be set according to actual conditions and is not limited here. For example, the resistance of the fourth resistor R4 may be 1KΩ.

[0083] In some optional embodiments, such as Figure 2 As shown, the input end of the driving module 10 may include a first input end IN, the control module 20 may include a first control end COL1, and the driving control circuit 100 may further include a unidirectional conduction module 80, which may be connected between the first control end COL1 and the first input end IN, and the unidirectional conduction module 80 may be used to control the current to flow from the first control end COL1 to the first input end IN. In this way, the current can be prevented from flowing from the first input end IN to the first control end COL1, which helps to protect the control module 20.

[0084] Exemplarily, the unidirectional conduction module may include a diode D1. An anode of the diode D1 is connected to the first control terminal COL1, and a cathode of the diode D1 is connected to the first input terminal IN.

[0085] In some optional embodiments, such as Figure 2 As shown, the drive control circuit 100 further includes a second current limiting module 90, which is connected between the first control terminal COL1 and the unidirectional conduction module 80. In this way, the current from the first control terminal COL1 to the unidirectional conduction module 80 can be controlled by the second current limiting module 90, thereby helping to prevent the current flowing through the unidirectional conduction module 80 from being too large, so as to protect the unidirectional conduction module 80.

[0086] For example, the second current limiting module 90 may include a fifth resistor R5. The resistance of the fifth resistor R5 may be set according to actual conditions and is not limited here. The resistance of the fifth resistor R5 may be 1KΩ.

[0087] Optionally, the control signal may further include a third control signal and a fourth control signal, the control module 20 may further include a third control terminal GPIO and a fourth control terminal SPI2, the driving module 10 may further include a second input terminal IDLE and a third input terminal SPI1, the third control terminal GPIO is connected to the second input terminal IDLE, the fourth control terminal SPI2 is connected to the third input terminal SPI1, the second input terminal IDLE is used to access the first control signal or the second control signal output by the third control terminal GPIO, and the third input terminal SPI1 is used to access the third control signal or the fourth control signal input by the fourth control terminal SPI2. Among them, the third control signal may be a control signal for controlling the driving module 10 to output an enable signal, and the fourth control signal may be a control signal for controlling the driving module 10 to output a non-enable signal.

[0088] Table 1 shows a truth table between the output of the first control terminal COL1, the second control terminal COL2, the third control terminal GPIO, the first input terminal IN, the second input terminal IDLE and the output terminal OUT of the control module 20 in different modes.

[0089] Table 1

[0090] model COL1 IN COL2 GPIO IDLE OUT Default Mode 0 0 0 0 0 1 Normal Mode 0 / 1 0 / 1 0 1 1 1 / 0 Sleep Mode 0 0 0 0 0 1 Abnormal Mode 0 0 / 1 0 0 0 1 / 0

[0091] Among them, "0" in the table represents a low level signal, and "1" represents a high level signal. The default mode may be the default mode of the functional module 200. The normal mode may be a mode in which the MCU is in a non-fault state. The abnormal mode may be a mode in which the MCU is in a fault state. The sleep mode may be a mode in which the functional module 200 is in a non-working state.

[0092] Optionally, when both the first input terminal IN and the second input terminal IDLE are connected to the first control signal, the output state of the output terminal OUT of the driving module 10 can be controlled by the control signal received by the first input terminal IN or the third input terminal SPI1. For example, when both the first input terminal IN and the second input terminal IDLE are connected to high-level signals, the first input terminal IN is connected to a high-level signal or the third input terminal SPI1 is connected to a third control signal, and the output terminal OUT of the driving module 10 outputs a low-level signal. For another example, when both the first input terminal IN and the second input terminal IDLE are high-level signals, the third input terminal SPI1 is connected to a fourth control signal, and the output terminal OUT of the driving module 10 outputs a high-level signal.

[0093] When the first input terminal IN is connected to the first control signal and the second input terminal IDLE is connected to the second control signal, the vehicle can enter the limp home mode, and the output terminal OUT of the driving module 10 continuously outputs the enable signal. For example, when the first input terminal IN is connected to the high level signal and the second input terminal IDLE is connected to the high level signal, the output terminal OUT of the driving module 10 continuously outputs the low level signal.

[0094] In order to better understand the present application, the drive control circuit of the present application is illustrated below with reference to specific application scenarios.

[0095] Take the functional module 200 as an example, for example, Figure 2 As shown, when the MCU is in a fault-free state and the vehicle is in a normal mode, when the first control terminal COL1 outputs a high-level signal and the second control terminal COL2 outputs a low-level signal, the first input terminal IN is connected to a high-level signal, the second input terminal IDLE is connected to a low-level signal, the low-side driver chip outputs a low-level signal, the relay K1 is turned on, and the wiper motor is in a working state. Alternatively, when the third control terminal GPIO outputs a third control signal, the third input terminal SPI1 is connected to the third control signal, the low-side driver chip outputs a low-level signal, the relay K1 is turned on, and the wiper motor is in a working state.

[0096] When the first control terminal COL1 outputs a high level signal and the second control terminal COL2 outputs a high level signal, the first input terminal IN is connected to a high level signal, the second input terminal IDLE is connected to a high level signal, the low-side driver chip outputs a high level signal, the relay K1 is turned off, and the wiper motor is in a non-operating state. Alternatively, when the third control terminal GPIO outputs a fourth control signal, the third input terminal SPI1 is connected to the fourth control signal, the low-side driver chip outputs a high level signal, the relay K1 is turned off, and the wiper motor is in a non-operating state.

[0097] When the MCU is in a fault-free state and the vehicle switches to sleep mode, the entire vehicle and the loads in the vehicle are in a non-working state. If the wiper motor is in a working state, the first input terminal IN is a high-level signal, keeping the wiper motor in a running state. Before entering the sleep mode, the second control terminal COL2 switches from a low-level signal to a high-level signal, and the NPN transistor Q2 is turned on. The low-level signal of the ground terminal GND can be transmitted to the first input terminal IN through the NPN transistor Q2, so that the low-side driver chip outputs a high-level signal, the relay K1 is turned off, and the wiper motor is in a non-working state.

[0098] When the MCU is in a fault state, the first control terminal COL1, the second control terminal COL2 and the fourth control terminal SPI2 of the MCU are not controlled by the control module 20. If the wiper motor is in a running state (i.e., the output terminal OUT of the low-side driver chip outputs a low-level signal), the PNP transistor Q1 can be controlled to be turned on to provide a high-level signal to the first input terminal IN of the low-side driver chip, thereby maintaining the output terminal OUT of the low-side driver chip to output a low-level signal. At this time, the relay K1 is turned on, and the wiper motor remains in a working state; if the wiper motor is in a non-working state (i.e., the output terminal OUT of the low-side driver chip outputs a high-level signal), the relay K1 is turned off, and the wiper motor remains in a non-working state. That is to say, when the MCU is in a fault state, the wiper motor can maintain the current state, which helps the driver to see the road conditions in front of the vehicle clearly and drive normally, ensuring the driver's driving safety.

[0099] Based on the same inventive concept, the embodiment of the present application also provides a vehicle, the vehicle includes the drive control circuit as described in the above embodiment, so the vehicle provided by the embodiment of the present application has the beneficial effects described in the above embodiment. For example, the vehicle of the embodiment of the present application can be a fuel vehicle, a pure electric vehicle, or a hybrid vehicle, etc., and the embodiment of the present application does not specifically limit this.

[0100] like Figure 3 As shown, the vehicle 1000 provided in the embodiment of the present application may include a functional module 200 and a drive control circuit 100. The functional module 200 may be connected between the drive control circuit 100 and the ground terminal. According to the vehicle provided in the embodiment of the present application, in the case of an abnormal or faulty state of the control module, the self-locking module may maintain the output of the drive module outputting an enable signal at the output end of the drive module, so that the switch module is turned on under the control of the enable module, and the functional module can be controlled to be in a working state. That is to say, in the embodiment of the present application, in the case of an abnormal or faulty state of the control module, the driver can use the functional module normally, thus helping the driver to drive normally.

[0101] It should be noted that in the embodiments shown in the above figures, the resistor is represented by a single resistor, and the capacitor is represented by a single capacitor. In other embodiments, the resistor may be an integration of series, parallel or mixed resistors, and the capacitor may be an integration of series, parallel or mixed capacitors. The specific parameters of each device can be set according to actual needs, and this application does not limit this.

[0102] Herein, the term “connected” may refer to two components being directly connected or being connected via one or more other components.

[0103] In addition, in this article, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A drive control circuit, characterized in that: include: Driver module; A control module connected to the input end of the driving module, and used to provide a control signal to the input end of the driving module in a fault-free state, so as to control the output end of the driving module to output an enable signal or a disable signal; a switch module, connected to the output end of the driving module and the functional module, and configured to be turned on when the output end of the driving module outputs the enable signal, so as to control the functional module to be in a working state, and turned off when the output end of the driving module outputs the disable signal, so as to control the functional module to be in a non-working state; The self-locking module is connected to the output end of the driving module and is used to maintain the output end of the driving module outputting the enable signal when the output end of the driving module outputs the enable signal.

2. The drive control circuit according to claim 1, characterized in that: The input end of the driving module includes a first input end, the control signal includes a first control signal and a second control signal, when the first input end is connected to the first control signal, the output end of the driving module outputs the enable signal, and when the first input end is connected to the second control signal, the output end of the driving module outputs the disable signal; The self-locking module is also connected to the first input end. The self-locking module is used to control the first input end to access the first control signal when the output end of the driving module outputs the enable signal, so as to maintain the output end of the driving module outputting the enable signal.

3. The drive control circuit according to claim 2, characterized in that: The self-locking module includes a first switch submodule, a control end of which is connected to the output end of the driving module. When the output end of the driving module outputs the enable signal, the first switch submodule is turned on to control the first input end to access the first control signal.

4. The drive control circuit according to claim 3, characterized in that: The self-locking module further includes a voltage dividing submodule, wherein the voltage dividing submodule and the first switch submodule are connected in series between the first power supply and the ground terminal, and a voltage dividing node of the voltage dividing submodule is connected to the first input terminal.

5. The drive control circuit according to claim 4, characterized in that: The first switch submodule includes a PNP transistor or a P-type MOS transistor; And / or, the voltage dividing submodule includes a first resistor and a second resistor, the first resistor and the second resistor are connected in series, and the voltage dividing node is located between the first resistor and the second resistor.

6. The drive control circuit according to claim 1, characterized in that: The input end of the driving module includes a first input end, the control signal includes a first control signal and a second control signal, when the first input end is connected to the first control signal, the output end of the driving module outputs the enable signal, and when the first input end is connected to the second control signal, the output end of the driving module outputs the disable signal; The drive control circuit further includes a lock clearing module connected between the control module and the first input terminal and used for controlling the first input terminal to access the second control signal.

7. The drive control circuit according to claim 6, characterized in that: The control module includes a first control terminal and a second control terminal, wherein the first control terminal is connected to the first input terminal. The lock clearing module comprises a second switch submodule, a control end of the second switch submodule is connected to the second control end, a first end of the second switch submodule is connected to the first input end, and a second end of the second switch submodule is connected to the ground end.

8. The drive control circuit according to claim 7, characterized in that: The second switch submodule includes an NPN transistor or an N-type MOS transistor.

9. The drive control circuit according to claim 7, characterized in that: The drive control circuit further includes a reset module, the reset module is connected between the control terminal of the second switch submodule and the ground terminal, and the reset module is used to provide a reset signal to the control terminal of the second switch submodule; And / or, the drive control circuit further includes a first current limiting module, and the first current limiting module is connected between the second control end and the lock clearing module.

10. The drive control circuit according to claim 9, characterized in that: The reset module includes a third resistor, and / or the first current limiting module includes a fourth resistor.

11. The drive control circuit according to claim 1, characterized in that: The input end of the driving module includes a first input end, the control module includes a first control end, and the driving control circuit further includes a unidirectional conduction module, the unidirectional conduction module is connected between the first control end and the first input end, and the unidirectional conduction module is used to control the current to flow from the first control end to the first input end; The driving control circuit further includes a second current limiting module, which is connected between the first control end and the unidirectional conduction module.

12. The drive control circuit according to claim 11, characterized in that: The one-way conduction module includes a diode, and / or the second current limiting module includes a fifth resistor.

13. The drive control circuit according to claim 1, characterized in that: The switch module includes a relay.

14. A vehicle, characterized in that: It comprises a functional module and a driving control circuit as claimed in any one of claims 1 to 13, wherein the functional module is connected between the driving control circuit and a ground terminal.

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