A vehicle power module reset device, method, system and vehicle

Abstract

The present application relates to a vehicle power module reset device, method, system and vehicle, including a vehicle power module reset device, the device including a power module, a control module, a reset module and a detection arbitration module; the input end of the control module and the input end of the detection arbitration module are respectively connected to the output end of the power module; the output end of the control module is connected to the input end of the detection arbitration module; the output end of the detection arbitration module is connected to the input end of the reset module; the output end of the reset module is connected to the enable end of the power module; the detection arbitration module is used to detect whether the power module has a power supply output failure; the reset module is used to reset the power module. According to the technical solution of the present application, the power module is reset in the case of abnormal power supply output of the power module, and the microcontroller unit is prevented from resetting by mistake.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a vehicle power module resetting device, method, system and vehicle. Background Art

[0002] There are many electronic control units (ECUs) in current cars. For example, the engine electronic control system is responsible for the engine ignition and fuel injection, the electronic stability system is responsible for the car's braking, anti-lock, parking, etc., the electronic steering system provides steering assistance, and other windows, lights, locks, airbags, etc. are inseparable from the electronic control system. For electronic products, the most important thing is power supply. Whether the power supply of the microcontroller unit (MCU) is stable or not directly affects the reliability and safety of the entire electronic control system. The current MCU power supply technology solutions are all implemented through power chips.

[0003] Figure 1 A schematic diagram of the structure of a control module power supply device in the prior art is shown. Figure 1 As shown in the figure, this solution monitors the power status through the PGOOD pin of the power supply and the serial peripheral interface (SPI) communication. When the power module fails, the PGOOD pin outputs a low level, the MCU detects the low level, receives the power module fault information, and then accesses the detailed fault information of the power module through SPI communication, and makes corresponding fault processing through the SPI interface. However, when the power module power output fails, the control module power supply is abnormal, and the fault cannot be processed accordingly, and the entire system will remain in an abnormal state.

[0004] Figure 2 A schematic diagram showing the structure of another control module power supply device in the prior art is shown. Figure 2 As shown in the figure, this solution directly monitors the power status through the PGOOD pin of the power module. When the power module fails, the PGOOD pin outputs low, directly resetting the MCU to prevent MCU failure caused by abnormal power output of the power module. However, this solution will cause the MCU to be reset incorrectly in the case of a power output failure other than the power module, and in the case of a power output failure of the power module, the power module cannot be reset, causing the entire system to be in an abnormal state. Summary of the invention

[0005] In view of this, the present application proposes a vehicle power module reset device, method, system and vehicle, which at least achieves resetting the power module when the power supply output of the power module is abnormal, and prevents the microcontroller unit from resetting by mistake.

[0006] According to one aspect of the present application, a vehicle power module reset device is provided, the device comprising: a power module, a control module, a reset module and a detection arbitration module; the input end of the control module and the input end of the detection arbitration module are respectively connected to the output end of the power module; the output end of the control module is connected to the input end of the detection arbitration module; the output end of the detection arbitration module is connected to the input end of the reset module; the output end of the reset module is connected to the enable end of the power module;

[0007] The power supply module is used to supply power to the control module; the control module is used to control the vehicle; the detection arbitration module is used to detect whether the power supply module has a power supply output failure; the reset module is used to reset the power supply module in the event of a power supply output failure.

[0008] Furthermore, the above-mentioned detection arbitration module is also used to instruct the above-mentioned reset module to generate a reset signal for resetting the above-mentioned power supply module when a power supply output failure occurs in the above-mentioned power supply module; the above-mentioned detection arbitration module includes an arbitration unit and a first level reversal unit; the output end of the above-mentioned power supply module and the output end of the above-mentioned control module are respectively connected to the input end of the above-mentioned arbitration unit; the input end of the above-mentioned first level reversal unit is connected to the output end of the above-mentioned arbitration unit; the above-mentioned arbitration unit is used to indicate that the above-mentioned power supply module has a power supply output failure when outputting a low level; the above-mentioned first level reversal unit is used to output a high level opposite to the above-mentioned low level; the above-mentioned high level is used to instruct the above-mentioned reset module to generate the above-mentioned reset signal.

[0009] Furthermore, the arbitration unit includes a first resistor, a second resistor and a first target transistor; the base of the first target transistor is connected to the power status pin of the power module through the first resistor; the base of the first target transistor is connected to the status pin of the control module through the second resistor; the first target transistor is used to output the low level in a first situation, and the first situation is that the power status pin of the power module outputs a low level, the status pin of the control module outputs a low level, and the first target transistor is not conducting.

[0010] Furthermore, the first level reversal unit includes a second target transistor, a third target transistor and a fourth target transistor; the base of the second target transistor is connected to the emitter of the first target transistor through a resistor; the base of the third target transistor is connected to the collector of the second target transistor through a resistor; the base of the fourth target transistor is connected to the collector of the third target transistor; the first level reversal unit is used to output the high level in a second situation, and the second situation is that the second target transistor is not turned on, the third target transistor is turned on, and the fourth target transistor is turned on.

[0011] Furthermore, the reset module includes a reset signal generating unit and a second level reversal unit; the input end of the reset signal generating unit is connected to the output end of the first level reversal unit; the input end of the second level reversal unit is connected to the output end of the reset signal generating unit; the reset signal generating unit is used to generate the reset signal in the event of a power supply output failure in the power supply module; the second level reversal unit is used to output a reverse signal with the same frequency and opposite amplitude as the reset signal, and the reverse signal is used to instruct the power supply module to reset.

[0012] Furthermore, the reset signal generating unit includes a capacitor and a comparator; the positive end of the comparator is connected to the output end of the first level inverting unit; the negative end of the comparator is connected to one end of the capacitor; the other end of the capacitor is grounded; the capacitor is used to adjust the negative end voltage of the comparator;

[0013] The comparator is used to compare the output voltage of the first level inversion unit and the negative terminal voltage of the comparator, and to output a square wave signal when the output voltage of the first level inversion unit is greater than the negative terminal voltage of the comparator, and use the square wave signal as the reset signal.

[0014] Furthermore, the above-mentioned second level reverse unit includes a fifth target transistor; the base of the above-mentioned fifth target transistor is connected to the output end of the above-mentioned reset signal generating unit through a resistor; the collector of the above-mentioned fifth target transistor is connected to the enable end of the above-mentioned power module; the emitter of the above-mentioned fifth target transistor is grounded; the above-mentioned fifth target transistor is used to output the above-mentioned reverse signal.

[0015] Furthermore, the above-mentioned device also includes a wake-up module, and the output end of the above-mentioned wake-up module is respectively connected to the enable end of the above-mentioned power module and the output end of the above-mentioned reset module; the above-mentioned wake-up module is used to start the above-mentioned reset module.

[0016] According to another aspect of the present application, a method for resetting a vehicle power module is provided, and the method is applied to the above-mentioned vehicle power module resetting device, and the method includes: obtaining the status of the power module based on a detection arbitration module; generating a reset signal based on a reset module when the above-mentioned status indicates that the above-mentioned power module has a power supply output failure; resetting the above-mentioned power module based on the above-mentioned reset signal; the above-mentioned reset power module is used to power a control module, and the above-mentioned control module is used to control the vehicle.

[0017] According to another aspect of the present application, a vehicle power module reset system is provided, and the system includes the vehicle power module reset device described above.

[0018] According to another aspect of the present application, a vehicle is provided, and the vehicle includes the above-mentioned vehicle power module reset system.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

[0020] Implementing this application has the following beneficial effects:

[0021] The embodiment of the present application utilizes a detection arbitration module to detect whether the power supply module has a power supply output failure, and a reset module is used to reset the power supply module when the power supply module has a power supply output failure, thereby resetting the power supply module when the power supply output of the power supply module is abnormal and preventing the microcontroller from being reset incorrectly.

[0022] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 A schematic structural diagram of a control module power supply device is shown.

[0025] Figure 2 A schematic diagram showing the structure of a control module power supply device Figure 1 .

[0026] Figure 3 A structural schematic diagram of a vehicle power module resetting device is shown.

[0027] Figure 4 A schematic diagram showing the structure of a vehicle power module reset device Figure 1 .

[0028] Figure 5 A schematic diagram showing the structure of a vehicle power module reset device Figure 2 .

[0029] Figure 6 A waveform diagram of a reset signal is shown.

[0030] Figure 7 A waveform showing a reset signal Figure 1 .

[0031] Figure 8 A flow chart showing a method for resetting a vehicle power module. DETAILED DESCRIPTION

[0032] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0033] The word "exemplary" is used exclusively herein to mean "serving as an example, example, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0034] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0035] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0036] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0037] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0038] Figure 3 FIG. 1 is a schematic diagram showing the structure of a vehicle power module reset device. Figure 3 As shown, the above device includes: a power module, a control module, a reset module and a detection arbitration module;

[0039] The input end of the control module and the input end of the detection arbitration module are respectively connected to the output end of the power module; the output end of the control module is connected to the input end of the detection arbitration module; the output end of the detection arbitration module is connected to the input end of the reset module; the output end of the reset module is connected to the enable end of the power module;

[0040] The power supply module is used to supply power to the control module;

[0041] The control module is used to control the vehicle;

[0042] The detection arbitration module is used to detect whether the power supply module has a power supply output failure;

[0043] The reset module is used to reset the power module when a power output failure occurs in the power module.

[0044] In an optional embodiment, if Figure 3 The above device may also include a vehicle battery and a wake-up module, wherein the output end of the vehicle battery is respectively connected to the input end of the wake-up module and the input end of the power module. The above control module may be a microcontroller unit (MCU), the above reset module and the above detection arbitration module may be circuits constructed by discrete devices, and the above connection may be achieved by electrical connection. Figure 3 As shown, the VCC terminal of the power module is a voltage output terminal, and the power module supplies power to the control module through the VCC terminal. The control module can also access the detailed fault information of the power module through SPI communication, and make a corresponding fault processing through SPI. The PGOOD pin of the power module is a power status pin. In the case of a fault in the power module, the PGOOD pin outputs a low level. The PORST pin of the control module is a status pin of the control module. In the case of a fault in the control module, the PORST pin outputs a low level.

[0045] In an optional embodiment, the detection arbitration module is further used to instruct the reset module to generate a reset signal for resetting the power module when a power output failure occurs in the power module; Figure 4 A schematic diagram showing the structure of a vehicle power module reset device Figure 2 ,like Figure 4 As shown, the above detection arbitration module includes an arbitration unit and a first level reversal unit;

[0046] The output end of the power module and the output end of the control module are connected to the input end of the arbitration unit respectively; the input end of the first level inversion unit is connected to the output end of the arbitration unit;

[0047] The arbitration unit is used to indicate that a power supply output failure occurs in the power module when the output is low level;

[0048] The first level inverting unit is used to output a high level opposite to the low level; the high level is used to instruct the reset module to generate the reset signal.

[0049] In an optional embodiment, the arbitration unit includes a first resistor, a second resistor and a first target transistor;

[0050] The base of the first target transistor is connected to the power state pin of the power module through the first resistor; the base of the first target transistor is connected to the state pin of the control module through the second resistor;

[0051] The first target transistor is used to output the low level in a first situation, wherein the power state pin of the power module outputs a low level, the state pin of the control module outputs a low level, and the first target transistor is not conducting.

[0052] Specifically, the connection may be realized through electrical connection, and the arbitration unit and the first level inversion unit may be circuits constructed by discrete devices. Figure 5 A schematic diagram showing the structure of a vehicle power module reset device Figure 2 ,like Figure 5 As shown, the first resistor can be represented by R1, and the value of R1 can be 10KΩ, the second resistor can be represented by R2, and the value of R2 can be 10KΩ, the first target transistor can be represented by Q1, specifically, the first target transistor can be an NPN transistor, the emitter of the first target transistor can be grounded through a resistor R3, and the value of R3 can be 47KΩ, the power state pin of the power module is the PGOOD pin, and the state pin of the control module is the PORST pin. The base voltage of the first target transistor is used as VOUT1, and the emitter voltage of the first target transistor is used as VOUT2. In the case of a power module failure, the PGOOD pin will output a low level, and in the case of a control module failure, the PORST pin will output a low level. If and only if the power module fails to output power, the PGOOD pin and the PORST pin will output a low level at the same time, at this time, the first target transistor Q1 is not turned on, and the arbitration unit outputs a low level, that is, VOUT2 is a low level.

[0053] In an optional embodiment, when the power module fails but the failure is not a power output failure, the PGOOD pin outputs a low level, the PORST pin outputs a high level, and when neither the power module nor the control module fails, the PGOOD pin and the PORST pin simultaneously output a high level. In both cases, the output of the arbitration unit is a high level, that is, VOUT2 is a high level. By simultaneously judging the level output conditions of the power status pin of the power module and the status pin of the control module, it is achieved that only when the output levels of the power status pin of the power module and the status pin of the control module meet the conditions at the same time, it can be determined that the power module has a power output failure.

[0054] In an optional embodiment, the first level inversion unit includes a second target triode, a third target triode and a fourth target triode;

[0055] The base of the second target transistor is connected to the emitter of the first target transistor through a resistor; the base of the third target transistor is connected to the collector of the second target transistor through a resistor; the base of the fourth target transistor is connected to the collector of the third target transistor; Figure 3 As shown, the second target transistor can be represented by Q2, the third target transistor can be represented by Q3, the fourth target transistor can be represented by Q4, the second target transistor can be an NPN transistor, the third target transistor can be an NPN transistor, and the fourth target transistor can be a PNP transistor. The base of the second target transistor can be connected to the emitter of the first target transistor through a resistor R4, and the emitter and base of the second target transistor can be connected through a resistor R5. The collector voltage of the second target transistor is represented by VOUT3, the base of the third target transistor can be connected to the collector of the second target transistor through a resistor R7, and the base of the third target transistor can be connected to the emitter of the third target transistor through a resistor R8. R10 and R11 are voltage-dividing resistors, and the voltage of node one is taken as VOUT4.

[0056] The first level inverting unit is used to output the high level in a second situation, where the second situation is that the second target transistor is not turned on, the third target transistor is turned on, and the fourth target transistor is turned on.

[0057] Specifically, the above connection can be realized by electrical connection. The above second situation is the situation that the above power module has a power supply output failure. By reasonably setting the resistance of R4-R11, in the above second situation, Q2 is not turned on, VOUT3 is at a high level, Q3 and Q4 are turned on, and VOUT4 is at a high level. The resistance of R4 can be selected as 10KΩ, the resistance of R5 can be selected as 47KΩ, the resistance of R6 can be selected as 100KΩ, the resistance of R7 can be selected as 10KΩ, the resistance of R8 can be selected as 47KΩ, the resistance of R9 can be selected as 10KΩ, the resistance of R10 can be selected as 10KΩ, and the resistance of R11 can be selected as 20KΩ.

[0058] In an optional embodiment, when the fault of the above-mentioned power supply module is not a power supply output fault, the output voltages of PGOOD and PORST are not all low levels, VOUT1 is high level, at this time Q1 is turned on, Q2 is turned on, VOUT3 output is low level, Q3 is not turned on, Q4 is not turned on, and VOUT4 is low level.

[0059] In an optional embodiment, if Figure 2 As shown, the above reset module includes a reset signal generating unit and a second level inverting unit;

[0060] The input end of the reset signal generating unit is connected to the output end of the first level inverting unit; the input end of the second level inverting unit is connected to the output end of the reset signal generating unit;

[0061] The reset signal generating unit is used to generate the reset signal in case of a power supply output failure in the power supply module;

[0062] The second level inversion unit is used to output an inversion signal having the same frequency as the reset signal and an opposite amplitude, and the inversion signal is used to instruct the power module to reset.

[0063] The reset signal generating unit and the second level inverting unit may be circuits constructed by discrete devices. In an optional embodiment, the reset signal generating unit includes a capacitor and a comparator; the positive end of the comparator is connected to the output end of the first level inverting unit; the negative end of the comparator is connected to one end of the capacitor; the other end of the capacitor is grounded;

[0064] The capacitor is used to adjust the negative terminal voltage of the comparator. The connection can be realized by electrical connection. Figure 3As shown, the above-mentioned capacitor can be represented by C1, the above-mentioned comparator can be represented by U1, the positive terminal voltage of the above-mentioned comparator is the output voltage of the above-mentioned first level inverting unit, that is, VOUT4, the negative terminal voltage of the above-mentioned comparator can be represented as VC1, the wake-up source voltage can be represented as V-wakeup, and the output voltage of the above-mentioned comparator can be represented as VOUT5.

[0065] The comparator is used to compare the output voltage of the first level inversion unit and the negative terminal voltage of the comparator, and to output a square wave signal when the output voltage of the first level inversion unit is greater than the negative terminal voltage of the comparator, and use the square wave signal as the reset signal.

[0066] Specifically, in the event of a power supply output failure in the power module, the outputs of the PGOOD and PORST pins are both low, VOUT4 is high, the positive terminal voltage VOUT4 of the comparator U1 is higher than the negative terminal voltage VC1, and VOUT5 is high. By reasonably setting the resistance values ​​of R10, R11, and R13, the divided voltage VOUT4 is smaller than V-wakeup. The negative terminal of the comparator is charged by VOUT5 through R14 to C1, and the maximum value of the negative terminal voltage VC1 of the comparator can reach V-wakeup. Therefore, when the negative terminal voltage VC1 of the comparator U1 is greater than the positive terminal voltage VOUT4, the comparator U1 outputs VOUT5 as a low level. At this time, the positive terminal voltage VOUT4 of the above-mentioned comparator U1 is the divided voltage value of R10 and R11, and the negative terminal voltage VC1 of the above-mentioned comparator U1 is discharged by C1 through R14, R12, and R13 and slowly decreases. When the negative terminal voltage VC1 of the above-mentioned comparator U1 is less than the positive terminal voltage VOUT4, the output VOUT5 of the above-mentioned comparator U1 is high level again, which will generate a reset square wave. Figure 6 A waveform diagram of a reset signal is shown. The output VOUT5 of the comparator U1 is a reset square wave. Figure 6 shown.

[0067] When the fault of the power module is not a power supply output fault, the output voltages of PGOOD and PORST are not all low, VOUT1 is high, then Q1 is turned on, Q2 is turned on, VOUT3 output is low, Q3 is not turned on, Q4 is not turned on, VOUT4 is low, at this time there is no voltage difference between the positive and negative ends of the comparator U1, and the U1 output VOUT5 is low.

[0068] In a specific embodiment, the second level reverse unit includes a fifth target transistor; the base of the fifth target transistor is connected to the output end of the reset signal generating unit through a resistor; the collector of the fifth target transistor is connected to the enable end of the power module; the emitter of the fifth target transistor is grounded; and the fifth target transistor is used to output the reverse signal.

[0069] Specifically, the above connection can be achieved through electrical connection, such as Figure 5 As shown, the fifth target transistor can be represented as Q5, the output end of the reset signal generating unit is the output end of the comparator U1, the base of the fifth target transistor is connected to the output end of the comparator U1 through a resistor R15, the base of the fifth target transistor is connected to the emitter of the fifth target transistor through a resistor R16, R17 and R18 are voltage dividing resistors, and the voltage of node 2 is used as VOUT6. In the case of a power supply output failure in the above power module, the outputs of the PGOOD and PORST pins are both low, Q1 is not conducting, Q2 is not conducting, VOUT3 outputs a high level, Q3 is conducting, Q4 is conducting, VOUT4 outputs a high level, and VOUT5 outputs a reset square wave. By reasonably setting the resistance values ​​of R15, R16, R17, and R18, VOUT6 outputs a square wave with the same frequency and opposite amplitude as VOUT5. At this time, the power module will be reset until the power module returns to normal. When PGOOD is pulled high again, the reset square wave stops generating, and the system returns to normal. The waveform of VOUT6 is as follows: Figure 6 As shown, the resistance of R15 can be selected as 15KΩ, the resistance of R16 can be selected as 45KΩ, the resistance of R17 can be selected as 45KΩ, and the resistance of R18 can be selected as 15KΩ.

[0070] When the fault of the above power module is not a power supply output fault, the output voltages of PGOOD and PORST are not all low, Q1 is turned on, Q2 is turned on, VOUT3 outputs a low level, Q3 is not turned on, Q4 is not turned on, VOUT4 outputs a low level, VOUT5 outputs a low level, when VOUT5 outputs a low level, Q5 is not turned on, VOUT6 outputs a high level, and the power module will not be reset. Figure 7 A waveform showing a reset signal Figure 1 , when the fault of the power module is not a power supply output fault, the waveforms of VOUT1, VOUT4, VIC1, VOUT5, and VOUT6 are as follows: Figure 7 shown.

[0071] In an optional embodiment, the device further includes a wake-up module, the output end of which is respectively connected to the enable end of the power module and the output end of the reset module; the wake-up module is used to start the reset module. By selecting the pull-up power supply of the reset module as the wake-up source voltage, the device can be prevented from resetting the power module by mistake when the power module is in normal sleep mode.

[0072] Figure 8 A flow chart of a method for resetting a vehicle power module is shown. The embodiment of the present application also provides a method for resetting a vehicle power module. The method is applied to the above-mentioned vehicle power module resetting device, such as Figure 8 As shown, the above method includes:

[0073] S501. Acquire the status of the power module based on the detection arbitration module;

[0074] Specifically, the detection arbitration module detects that the PGOOD pin of the power module outputs a low level and the PORST pin of the control module outputs a low level, and determines that a power supply output failure occurs in the power module.

[0075] S503. In the case where the above state indicates that the power supply module has a power supply output failure, a reset signal is generated based on the reset module;

[0076] Specifically, when the state indicates that the power supply module has a power supply output failure, the detection arbitration module outputs a high level, and the high level instructs the reset module to generate a reset signal, and the reset signal is a square wave signal.

[0077] S505. Based on the reset signal, the power module is reset; the reset power module is used to supply power to the control module, and the control module is used to control the vehicle.

[0078] Specifically, after receiving the reset signal, the power module is reset until the power module works normally.

[0079] An embodiment of the present application also provides a vehicle power module reset system, the system comprising the vehicle power module reset device.

[0080] An embodiment of the present application also provides a vehicle, which includes the above-mentioned vehicle power module reset system.

[0081] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A vehicle power module reset device, characterized in that: The device comprises: a power supply module, a control module, a reset module and a detection arbitration module; The input end of the control module and the input end of the detection arbitration module are respectively connected to the output end of the power module; the output end of the control module is connected to the input end of the detection arbitration module; the output end of the detection arbitration module is connected to the input end of the reset module; the output end of the reset module is connected to the enable end of the power module; The power module is used to supply power to the control module; The control module is used to control the vehicle; The detection arbitration module is used to detect whether the power supply module has a power supply output failure; The reset module is used to reset the power module when a power output failure occurs in the power module; The detection arbitration module is further used to output a high level when both the power state pin of the power module and the state pin of the control module output a low level, and to output a low level when neither the power state pin of the power module nor the state pin of the control module outputs a low level, and the high level output by the detection arbitration module is used to instruct the reset module to generate the reset signal; the detection arbitration module includes an arbitration unit and a first level inversion unit; The output end of the power module and the output end of the control module are respectively connected to the input end of the arbitration unit; the input end of the first level inversion unit is connected to the output end of the arbitration unit; The arbitration unit is used to indicate that the power supply module has a power supply output failure when outputting a low level; The first level inverting unit is used to output a high level opposite to the low level; the high level is used to instruct the reset module to generate the reset signal.

2. The device according to claim 1, characterized in that The arbitration unit includes a first resistor, a second resistor and a first target transistor; The base of the first target transistor is connected to the power state pin of the power module through the first resistor; the base of the first target transistor is connected to the state pin of the control module through the second resistor; The first target transistor is used to output the low level in a first situation, where the power status pin of the power module outputs a low level, the status pin of the control module outputs a low level, and the first target transistor is not conducting.

3. The device according to claim 1, characterized in that The first level inversion unit includes a second target triode, a third target triode and a fourth target triode; The base of the second target transistor is connected to the emitter of the first target transistor through a resistor; the base of the third target transistor is connected to the collector of the second target transistor through a resistor; the base of the fourth target transistor is connected to the collector of the third target transistor; The first level inverting unit is used for outputting the high level in a second situation, where the second situation is a situation where the second target transistor is not turned on, the third target transistor is turned on, and the fourth target transistor is turned on.

4. The device according to claim 1, characterized in that The reset module includes a reset signal generating unit and a second level inverting unit; The input end of the reset signal generating unit is connected to the output end of the first level inverting unit; the input end of the second level inverting unit is connected to the output end of the reset signal generating unit; The reset signal generating unit is used to generate the reset signal when a power supply output failure occurs in the power supply module; The second level inversion unit is used to output an inversion signal having the same frequency as the reset signal and an opposite amplitude, and the inversion signal is used to instruct the power module to reset.

5. The device according to claim 4, characterized in that The reset signal generating unit comprises a capacitor and a comparator; the positive end of the comparator is connected to the output end of the first level inverting unit; the negative end of the comparator is connected to one end of the capacitor; the other end of the capacitor is grounded; The capacitor is used to adjust the negative terminal voltage of the comparator; The comparator is used to compare the output voltage of the first level inversion unit and the negative terminal voltage of the comparator, and to output a square wave signal when the output voltage of the first level inversion unit is greater than the negative terminal voltage of the comparator, and use the square wave signal as the reset signal.

6. The device according to claim 4, characterized in that The second level inversion unit includes a fifth target transistor; the base of the fifth target transistor is connected to the output end of the reset signal generating unit through a resistor; the collector of the fifth target transistor is connected to the enable end of the power module; the emitter of the fifth target transistor is grounded; The fifth target transistor is used to output the reverse signal.

7. The device according to claim 1, characterized in that The device also includes a wake-up module, the output end of which is connected to the enable end of the power module and the output end of the reset module respectively; the wake-up module is used to start the reset module.

8. A method for resetting a vehicle power module, the method being applied to the vehicle power module resetting device according to any one of claims 1 to 7, characterized in that: The method comprises: Acquiring the state of the power module based on the detection arbitration module; When the state indicates that the power supply module has a power output failure, a reset signal is generated based on a reset module; Based on the reset signal, the power module is reset; the reset power module is used to supply power to the control module, and the control module is used to control the vehicle.

9. A vehicle power module reset system, characterized in that: The system comprises the vehicle power module resetting device according to any one of claims 1 to 7.

10. A vehicle, characterized in that: The vehicle includes the vehicle power module reset system of claim 9.

Images