CN115817389A - Vehicle power module resetting device, method and system and vehicle - Google Patents
Vehicle power module resetting device, method and system and vehicle Download PDFInfo
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Abstract
The application relates to a vehicle power module resetting device, a method, a system and a vehicle, comprising a vehicle power module resetting device, wherein the device comprises a power module, a control module, a resetting 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 with the output end of the power supply module; the output end of the control module is connected with the input end of the detection arbitration module; the output end of the detection arbitration module is connected with the input end of the reset module; the output end of the reset module is connected with the enable end of the power module; the detection arbitration module is used for detecting whether the power supply module has power supply output faults or not; the reset module is used for resetting the power supply module. According to the technical scheme of the application, the power supply module is reset under the condition that the power supply output of the power supply module is abnormal, and the micro control unit is prevented from being reset by mistake.
Description
Technical Field
The application relates to the technical field of power supplies, in particular to a vehicle power supply module resetting device, method and system and a vehicle.
Background
There are many Electronic Control Units (ECUs) in current automobiles. For example, an engine electronic control system is responsible for ignition and oil injection of an engine, an electronic stabilizing system is responsible for braking, anti-locking, parking and the like of an automobile, an electronic steering system provides steering assistance, and other windows, lamps, locks, safety airbags and the like can not be separated from the electronic control system. For electronic products, the most important is power supply, and whether the power supply of a Micro Controller Unit (MCU) is stable or not directly affects the reliability and safety of the whole electronic control system. The current MCU power supply technical scheme is realized by a power supply chip.
Fig. 1 shows a schematic structural diagram of a control module power supply device in the prior art, and as shown in fig. 1, the scheme monitors a power state through a PGOOD pin of a power supply and Serial Peripheral Interface (SPI) communication. When the power module breaks down, the PGOOD pin outputs a low level, the MCU detects the low level, receives the power module fault information, then accesses the detailed fault information of the power module through the SPI communication, and makes corresponding fault processing through the SPI interface. However, when the power supply output fault of the power supply module occurs, the power supply of the control module is abnormal, the fault cannot be correspondingly processed, and the whole system is always in an abnormal state.
Fig. 2 shows a schematic structural diagram of another control module power supply device in the prior art, and as shown in fig. 2, the scheme directly monitors the power state through a PGOOD pin of a power module. When the power module breaks down, the output of the PGOOD pin is low, the MCU is directly reset, and the MCU fault caused by abnormal power supply output of the power module is prevented. However, in the case of a power output failure of the power module, the power module cannot be reset, which causes the whole system to be in an abnormal state.
Disclosure of Invention
In view of this, the present application provides a vehicle power module resetting device, method, system and vehicle, which at least achieve resetting of a power module and prevent a micro control unit from being reset by mistake when power supply output of the power module is abnormal.
According to an aspect of the present application, there is provided a vehicle power module resetting device, including: the device comprises 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 with the output end of the power supply module; the output end of the control module is connected with the input end of the detection arbitration module; the output end of the detection arbitration module is connected with the input end of the reset module; the output end of the reset module is connected with the enable end of the power module;
the power supply module is used for supplying power to the control module; the control module is used for controlling the vehicle; the detection arbitration module is used for detecting whether the power supply module has power supply output faults or not; the reset module is used for resetting the power supply module under the condition that the power supply module has power supply output faults.
Further, the detection arbitration module is further configured to instruct the reset module to generate a reset signal for resetting the power module when the power module has a power output failure; the detection arbitration module comprises an arbitration unit and a first level reversal unit; the output end of the power supply module and the output end of the control module are respectively connected with the input end of the arbitration unit; the input end of the first level inversion unit is connected with the output end of the arbitration unit; the arbitration unit is used for indicating the power supply module to have power supply output fault under the condition of outputting low level; the first level inversion unit outputs a high level opposite to the low level; the high level is used for indicating the reset module to generate the reset signal.
Furthermore, the arbitration unit comprises a first resistor, a second resistor and a first target triode; the base electrode of the first target triode is connected with the power state pin of the power module through the first resistor; the base electrode of the first target triode is connected with the state pin of the control module through the second resistor; the first target triode is used for outputting the low level under a first condition, wherein the first condition is that the power state pin of the power module outputs the low level, the state pin of the control module outputs the low level, and the first target triode is not conducted.
Further, the first level inversion unit includes a second target triode, a third target triode and a fourth target triode; the base electrode of the second target triode is connected with the emitter electrode of the first target triode through a resistor; the base electrode of the third target triode is connected with the collector electrode of the second target triode through a resistor; the base electrode of the fourth target triode is connected with the collector electrode of the third target triode; the first level inversion unit is configured to output the high level under a second condition that the second target transistor is not turned on, the third target transistor is turned on, and the fourth target transistor is turned on.
Further, the reset module comprises a reset signal generating unit and a second level inversion unit; the input end of the reset signal generating unit is connected with the output end of the first level inversion unit; the input end of the second level inversion unit is connected with the output end of the reset signal generation unit; the reset signal generating unit is used for generating the reset signal under the condition that the power supply module has power supply output failure; the second level inversion unit is configured to output an inversion signal having the same frequency as the reset signal and an opposite amplitude, where the inversion signal is used to instruct the power module to reset.
Further, the reset signal generating unit includes a capacitor and a comparator; the positive terminal of the comparator is connected with the output terminal of the first level inversion unit; the negative end of the comparator is connected with one end of the capacitor; the other end of the capacitor is grounded; the capacitor is used for adjusting the voltage of the negative terminal of the comparator;
the comparator is configured to compare an output voltage of the first level inverting unit with a negative terminal voltage of the comparator, and to output a square wave signal when the output voltage of the first level inverting unit is greater than the negative terminal voltage of the comparator, and to use the square wave signal as the reset signal.
Further, the second level inversion unit includes a fifth target transistor; the base electrode of the fifth target triode is connected with the output end of the reset signal generating unit through a resistor; the collector of the fifth target triode is connected with the enable end of the power supply module; an emitter of the fifth target triode is grounded; the fifth target transistor is configured to output the inverted signal.
Furthermore, the device also comprises a wake-up module, wherein the output end of the wake-up module is respectively connected with the enabling end of the power module and the output end of the reset module; the awakening module is used for starting the reset module.
According to another aspect of the present application, there is provided a method for resetting a vehicle power module, the method being applied to the vehicle power module resetting device, the method including: acquiring the state of the power supply module based on the detection arbitration module; generating a reset signal based on a reset module under the condition that the state indicates that the power supply module has a power supply output fault; resetting the power module based on the reset signal; the reset power module is used for supplying power to the control module, and the control module is used for controlling the vehicle.
According to another aspect of the present application, a vehicle power module resetting system is provided, which comprises the vehicle power module resetting device.
According to another aspect of the present application, there is provided a vehicle including the vehicle power module resetting system described above.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
The application has the following beneficial effects:
according to the embodiment of the application, whether the power supply module has a power supply 5 output fault or not is detected by the detection arbitration module, the reset module is used for resetting the power supply module under the condition that the power supply module has the power supply output fault, so that the power supply module is reset under the condition that the power supply module has abnormal power supply output, and the micro control unit is prevented from being reset by mistake.
Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.
Fig. 1 shows a schematic structural diagram of a control module power supply device.
Fig. 2 shows a first structural diagram of a control module power supply device.
Fig. 3 shows a schematic structural diagram of a vehicle power module resetting device.
Fig. 4 shows a first structural schematic diagram of a vehicle power module resetting device.
Fig. 5 shows a schematic structural diagram of a vehicle power module resetting device.
Fig. 6 shows a waveform diagram of a reset signal.
Fig. 7 shows a waveform diagram of a reset signal.
FIG. 8 illustrates a flow chart of a method of resetting a vehicle power module.
Detailed Description
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" with respect to 5 is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
Fig. 3 shows a schematic structural diagram of a vehicle power module resetting device. As shown in fig. 3, the above apparatus includes: the device comprises 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 with the output end of the power supply module; the output end of the control module is connected with the input end of the detection arbitration module; the output end of the detection arbitration module is connected with the input end of the reset module; the output end of the reset module is connected with the enable end of the power module;
the power supply module is used for supplying power to the control module;
the control module is used for controlling the vehicle;
the detection arbitration module is used for detecting whether the power supply module has power supply output faults or not;
the reset module is used for resetting the power supply module under the condition that the power supply module has power supply output faults.
In an alternative embodiment, as shown in fig. 3, the apparatus may further include a vehicle-mounted battery and a wake-up module, where an output end of the vehicle-mounted battery is respectively connected to an input end of the wake-up module and an input end of the power module. The control module may be a Micro Controller Unit (MCU), the reset module and the detection arbitration module may be circuits built by discrete devices, and the connection may be achieved by electrical connection. As shown in fig. 3, the VCC terminal of the power module is a voltage output terminal, the power module supplies power to the control module through the VCC terminal, and the control module can also access detailed fault information of the power module through SPI communication and process faults responding through SPI. The PGOOD pin of the power module is a power state pin, the PGOOD pin outputs a low level when the power module fails, the port pin of the control module is a state pin of the control module, and the port pin outputs a low level when the control module fails.
In an optional embodiment, the detection arbitration module is further configured to instruct the reset module to generate a reset signal for resetting the power module in case of a power output failure of the power module; fig. 4 is a schematic structural diagram of a vehicle power module resetting device, as shown in fig. 4, the detection arbitration module includes an arbitration unit and a first level inversion unit;
the output end of the power supply module and the output end of the control module are respectively connected with the input end of the arbitration unit; the input end of the first level inversion unit is connected with the output end of the arbitration unit 5;
the arbitration unit is used for indicating the power supply module to have power supply output fault under the condition of outputting low level;
the first level inversion unit outputs a high level opposite to the low level; the high level is used for indicating the reset module to generate the reset signal.
In an optional embodiment, the arbitration unit includes a first resistor, a second resistor, and a first target transistor;
the base electrode of the first target triode is connected with the power state pin of the power module through the first resistor; the base electrode of the first target triode is connected with the state pin of the control module through the second resistor;
the first target triode is used for outputting the low level under a first condition, wherein the first condition is that the power state pin of the power module outputs the low level, the state pin of the control module outputs the low level, and the first target triode is not conducted.
Specifically, the connection may be implemented by an electrical connection, and the arbitration unit and the first level inversion unit may be circuits built by discrete devices. Fig. 5 is a second schematic structural diagram of a 0 vehicle power module resetting apparatus, as shown in fig. 5, the first resistor may be represented by R1, the value of R1 may be 10K Ω, the second resistor may be represented by R2, the value of R2 may be 10K Ω, the first target transistor may be represented by Q1, and specifically, the first target transistor may be an NPN transistor, the emitter of the first target transistor may be grounded through a resistor R3, the value of R3 may be 47K Ω, the power status pin of the power module may be a PGOOD pin, the status pin of the control module may be a port pin, the base voltage of the first target transistor may be VOUT1, the emitter voltage of the first target transistor may be VOUT2, the PGOOD pin may output a low level in the case of a failure of the power module, and the st pin may output a low level in the case of a failure of the control module. And if the power supply module has a power supply output fault, the PGOOD pin and the port pin output a low level at the same time, at this time, the first target triode Q1 is not turned on, and the arbitration unit outputs a low level, that is, VOUT2 is a low level.
In an alternative embodiment, when the power module fails but the failure is a non-power-supply output failure, the PGOOD pin outputs a low level, the port pin outputs a high level, and when neither the power module nor the control module fails, the PGOOD pin and the port pin output a high level at the same time, and in both cases, the output of the arbitration unit is a high level, that is, VOUT2 is a high level. By judging the level output condition of the power state pin of the power module and the state pin of the control module at the same time, the power supply output fault of the power module can be determined only when the output levels of the power state pin of the power module and the state pin of the control module meet the conditions at the same time.
In an optional embodiment, the first level inversion unit includes a second target transistor, a third target transistor, and a fourth target transistor;
the base electrode of the second target triode is connected with the emitter electrode of the first target triode through a resistor; the base electrode of the third target triode is connected with the collector electrode of the second target triode through a resistor; the base electrode of the fourth target triode is connected with the collector electrode of the third target triode; as shown in fig. 3, the second target transistor may be represented by Q2, the third target transistor may be represented by Q3, the fourth target transistor may be represented by Q4, the second target transistor may be an NPN transistor, the third target transistor may be an NPN transistor, the fourth target transistor may be a PNP transistor, the base of the second target transistor may be connected to the emitter of the first target transistor through a resistor R4, the emitter and the base of the second target transistor may be connected to each other through a resistor R5, the collector voltage of the second target transistor may be represented by VOUT3, the base of the third target transistor may be connected to the collector of the second target transistor through a resistor R7, the base of the third target transistor may be connected to the emitter of the third target transistor through a resistor R8, R10 and R11 are divider resistors, and the voltage of node one may be referred to as VOUT4.
The first level inversion unit is configured to output the high level under a second condition that the second target transistor is not turned on, the third target transistor is turned on, and the fourth target transistor is turned on.
Specifically, the connection can be realized through electric connection, the second condition is the condition that the power supply output fault occurs to the power supply module, and the resistance of R4 to R11 is reasonably set, so that Q2 is not conducted, VOUT3 is a high level, Q3 and Q4 are conducted, and VOUT4 is a high level. The resistance of R4 may be selected to be 10K Ω, the resistance of R5 may be selected to be 47K Ω, the resistance of R6 may be selected to be 100K Ω, the resistance of R7 may be selected to be 10K Ω, the resistance of R8 may be selected to be 47K Ω, the resistance of R9 may be selected to be 10K Ω, the resistance of R10 may be selected to be 10K Ω, and the resistance of R11 may be selected to be 20K Ω.
In an optional embodiment, when the fault of the power module is not a power supply output fault, the output voltages of PGOOD and port are not all at a low level, VOUT1 is at a high level, at this time, Q1 is turned on, Q2 is turned on, VOUT3 is at a low level, Q3 is not turned on, Q4 is not turned on, and VOUT4 is at a low level.
In an alternative embodiment, as shown in fig. 2, 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 with the output end of the first level inversion unit; the input end of the second level inversion unit is connected with the output end of the reset signal generation unit;
the reset signal generating unit is used for generating the reset signal under the condition that the power supply module has power supply output failure;
the second level inversion unit is configured to output an inversion signal having the same frequency as the reset signal and an opposite amplitude, where the inversion signal is used to instruct the power module to reset.
The reset signal generating unit and the second level inversion unit may be circuits built by discrete devices. In an alternative embodiment, the reset signal generating unit includes a capacitor and a comparator; the positive terminal of the comparator is connected with the output terminal of the first level inversion unit; the negative end of the comparator is connected with one end of the capacitor; the other end of the capacitor is grounded;
the capacitor is used for adjusting the voltage of the negative terminal of the comparator. The connection may be made by an electrical connection. As shown in fig. 3, the capacitor may be represented by C1, the comparator may be represented by U1, the positive terminal voltage of the comparator may be represented by VOUT4, the negative terminal voltage of the comparator may be represented by VC1, the wake-up source voltage may be represented by V-wakeup, and the output voltage of the comparator may be represented by VOUT5.
The comparator is configured to compare an output voltage of the first level-reversing unit with a negative terminal voltage of the comparator, and output a square wave signal when the output voltage of the first level-reversing unit is greater than the negative terminal voltage of the comparator, and use the square wave signal as the reset signal.
Specifically, under the condition that the power supply output fault occurs to the power supply module, the output of the PGOOD and the port pin are both low level, VOUT4 is high level, the positive terminal voltage VOUT4 of the comparator U1 is higher than the negative terminal voltage VC1, VOUT5 is high level, the divided voltage VOUT4 is smaller than V-wakeup by reasonably setting the resistance values of R10, R11, and R13, the negative terminal of the comparator is charged to C1 through R14 by VOUT5, and the maximum value of the negative terminal voltage VC1 of the comparator can reach V-wakeup, so when the negative terminal voltage VC1 of the comparator U1 is greater than the positive terminal voltage VOUT4, VOUT5 is output as low level by the comparator U1. At this time, the positive terminal voltage VOUT4 of the comparator U1 is the divided voltage value of R10 and R11, the negative terminal voltage VC1 of the comparator U1 is discharged from C1 through R14, R12, and R13 and slowly decreases, and when the negative terminal voltage VC1 of the comparator U1 is smaller than the positive terminal voltage VOUT4, the output VOUT5 of the comparator U1 is again at a high level, so that a reset square wave is generated. Fig. 6 shows a waveform diagram of a reset signal, and the output VOUT5 of the comparator U1 is a reset square wave, which is shown in fig. 6.
Under the condition that the fault of the power module is not a power supply output fault, the output voltages of PGOOD and PORST are not all low level, VOUT1 is high level, at the moment, Q1 is conducted, Q2 is conducted, VOUT3 is low level, Q3 is not conducted, Q4 is not conducted, VOUT4 is low level, at the moment, no pressure difference exists between the positive end and the negative end of the comparator U1, and VOUT5 output by the U1 is low level.
In a specific embodiment, the second level inversion unit includes a fifth target transistor; the base electrode of the fifth target triode is connected with the output end of the reset signal generating unit through a resistor; the collector of the fifth target triode is connected with the enable end of the power supply module; an emitter of the fifth target triode is grounded; the fifth target transistor is configured to output the inverted signal.
Specifically, the connection may be implemented by an electrical connection, as shown in fig. 5, the fifth target transistor may be denoted as Q5, the output terminal of the reset signal generation unit is the output terminal of the comparator U1, a base of the fifth target transistor is connected to the output terminal of the comparator U1 through a resistor R15, the base of the fifth target transistor is connected to an emitter of the fifth target transistor through a resistor R16, R17 and R18 are voltage dividing resistors, and the voltage of the node 2 is denoted as VOUT6. Under the condition that the power supply output fault occurs to the power supply module, the output of the PGOOD and the port pin are both low level, Q1 is not conducted, Q2 is not conducted, VOUT3 is high level, Q3 is conducted, Q4 is conducted, VOUT4 is high level, VOUT5 is output as 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 as VOUT5 and the opposite amplitude, at this time, the power supply module is reset, until the power supply module recovers to be normal, when PGOOD is pulled up again, the reset square wave stops being generated, the system recovers to be normal, the waveform of VOUT6 is shown in fig. 6, the resistance of R15 may be selected to be 15K Ω, the resistance of R16 may be selected to be 45K Ω, the resistance of R17 may be selected to be 45K Ω, and the resistance of R18 may be selected to be 15K Ω.
Under the circumstances that the trouble that above-mentioned power module appeared is not the power supply output trouble, PGOOD and PORST's output voltage is the low level inadequately, and Q1 switches on, and Q2 switches on, and VOUT3 output is the low level, and Q3 does not switch on, and Q4 does not switch on, and VOUT4 output is the low level, and VOUT5 output is the low level, and when VOUT5 output is the low level, Q5 does not switch on, and VOUT6 outputs the high level, and power module can not reset this moment. Fig. 7 shows a waveform diagram of a reset signal, where VOUT1, VOUT4, VIC1, VOUT5, VOUT6 have waveforms as shown in fig. 7 in the case where the power module fails and is not a power supply output fault.
In an optional embodiment, the apparatus further includes a wake-up module, and an output end of the wake-up module is respectively connected to an enable end of the power module and an output end of the reset module; the awakening module is used for starting the reset module. The device can prevent the power module from being reset by mistake when the power module is in normal dormancy by selecting the pull-up power supply of the reset module as the wake-up source voltage.
Fig. 8 is a flowchart illustrating a method for resetting a vehicle power module, and an embodiment of the present application further provides a method for resetting a vehicle power module, where the method is applied to the vehicle power module resetting device, and as shown in fig. 8, the method includes:
s501, acquiring the state of a power supply module based on a detection arbitration module;
specifically, the detection arbitration module detects that a PGOOD pin of the power module outputs a low level and a port pin of the control module outputs a low level, and determines that the power module has a power supply output fault.
S503, under the condition that the state indicates that the power supply module has a power supply output fault, generating a reset signal based on a reset module;
specifically, when the state indicates that the power supply module has a power supply output fault, the detection arbitration module outputs a high level, the high level indicates that the reset module generates a reset signal, and the reset signal is a square wave signal.
S505, resetting the power supply module based on the reset signal; the reset power module is used for supplying power to the control module, and the control module is used for controlling the vehicle.
Specifically, the power module resets after receiving a reset signal until the power module operates normally.
The embodiment of the application also provides a vehicle power module resetting system which comprises the vehicle power module resetting device.
The embodiment of the application also provides a vehicle, and the vehicle comprises the vehicle power module resetting system.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (11)
1. A vehicle power module resetting apparatus, characterized in that the apparatus comprises: the device comprises 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 with the output end of the power supply module; the output end of the control module is connected with the input end of the detection arbitration module; the output end of the detection arbitration module is connected with the input end of the reset module; the output end of the reset module is connected with the enable end of the power supply module;
the power supply module is used for supplying power to the control module;
the control module is used for controlling a vehicle;
the detection arbitration module is used for detecting whether the power supply module has power supply output faults or not;
the reset module is used for resetting the power supply module under the condition that the power supply module has power supply output faults.
2. The apparatus of claim 1, wherein the detection arbitration module is further configured to instruct the reset module to generate a reset signal for resetting the power module in case of a power output failure of the power module; the detection arbitration module comprises an arbitration unit and a first level reversal unit;
the output end of the power supply module and the output end of the control module are respectively connected with the input end of the arbitration unit; the input end of the first level inversion unit is connected with the output end of the arbitration unit;
the arbitration unit is used for indicating the power supply module to have power supply output fault under the condition of outputting low level;
the first level inversion unit is used for outputting a high level opposite to the low level; the high level is used for instructing the reset module to generate the reset signal.
3. The apparatus of claim 2, wherein the arbitration unit comprises a first resistor, a second resistor, and a first target transistor;
the base electrode of the first target triode is connected with the power state pin of the power module through the first resistor; the base electrode of the first target triode is connected with the state pin of the control module through the second resistor;
the first target triode is used for outputting the low level under a first condition, and the first condition is that the power state pin of the power module outputs the low level, the state pin of the control module outputs the low level, and the first target triode is not conducted.
4. The apparatus of claim 2, wherein the first level inversion unit comprises a second target transistor, a third target transistor, and a fourth target transistor;
the base electrode of the second target triode is connected with the emitter electrode of the first target triode through a resistor; the base electrode of the third target triode is connected with the collector electrode of the second target triode through a resistor; the base electrode of the fourth target triode is connected with the collector electrode of the third target triode;
the first level inversion unit is configured to output the high level under a second condition, where the second condition is that the second target triode is not turned on, the third target triode is turned on, and the fourth target triode is turned on.
5. The apparatus of claim 2, wherein the reset module comprises a reset signal generating unit and a second level inverting unit;
the input end of the reset signal generating unit is connected with the output end of the first level inversion unit; the input end of the second level inversion unit is connected with the output end of the reset signal generation unit;
the reset signal generating unit is used for generating the reset signal under the condition that the power supply output fault occurs to the power supply module;
the second level inversion unit is used for outputting an inversion signal which has the same frequency as the reset signal and is opposite in amplitude, and the inversion signal is used for indicating the power supply module to reset.
6. The apparatus of claim 5, wherein the reset signal generating unit comprises a capacitor and a comparator; the positive end of the comparator is connected with the output end of the first level inversion unit; the negative end of the comparator is connected with one end of the capacitor; the other end of the capacitor is grounded;
the capacitor is used for adjusting the voltage of the negative terminal of the comparator;
the comparator is used for comparing the output voltage of the first level inversion unit with the negative terminal voltage of the comparator, and outputting a square wave signal under the condition that the output voltage of the first level inversion unit is greater than the negative terminal voltage of the comparator, and taking the square wave signal as the reset signal.
7. The apparatus of claim 5, wherein the second level inversion unit comprises a fifth target transistor; the base electrode of the fifth target triode is connected with the output end of the reset signal generating unit through a resistor; the collector of the fifth target triode is connected with the enable end of the power supply module; an emitter of the fifth target triode is grounded;
the fifth target triode is used for outputting the reverse signal.
8. The device of claim 1, further comprising a wake-up module, wherein an output terminal of the wake-up module is connected to the enable terminal of the power module and the output terminal of the reset module respectively; the awakening module is used for starting the reset module.
9. A method for resetting a vehicle power supply module, which is applied to the vehicle power supply module resetting device according to any one of claims 1 to 8, characterized by comprising:
acquiring the state of the power supply module based on the detection arbitration module;
generating a reset signal based on a reset module under the condition that the state indicates that the power supply module has a power supply output fault;
resetting the power module based on the reset signal; the reset power module is used for supplying power to the control module, and the control module is used for controlling the vehicle.
10. A vehicle power module resetting system, characterized in that the system comprises a vehicle power module resetting device according to any one of claims 1 to 8.
11. A vehicle characterized in that the vehicle includes the vehicle power module resetting system of claim 10.
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| CN202211529915.2A CN115817389A (en) | 2022-11-30 | 2022-11-30 | Vehicle power module resetting device, method and system and vehicle |
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| CN202211529915.2A CN115817389A (en) | 2022-11-30 | 2022-11-30 | Vehicle power module resetting device, method and system and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101867175A (en) * | 2010-04-23 | 2010-10-20 | 福建新大陆通信科技股份有限公司 | Shutdown circuit of GPS vehicle-mounted position system with function of remote multi-domain automatic shutdown |
| CN107180614A (en) * | 2017-06-26 | 2017-09-19 | 奇瑞汽车股份有限公司 | Vehicle-carrying display screen automatic recovery system, control method and back of the body optical detection circuit |
| CN113113894A (en) * | 2021-05-12 | 2021-07-13 | 天合光能股份有限公司 | Power failure detection and power supply protection circuit |
| US20210305897A1 (en) * | 2020-03-25 | 2021-09-30 | Rohm Co., Ltd. | Power supply controller |
| CN114690876A (en) * | 2022-03-17 | 2022-07-01 | 中汽创智科技有限公司 | System state monitoring reset circuit |
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2022
- 2022-11-30 CN CN202211529915.2A patent/CN115817389A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867175A (en) * | 2010-04-23 | 2010-10-20 | 福建新大陆通信科技股份有限公司 | Shutdown circuit of GPS vehicle-mounted position system with function of remote multi-domain automatic shutdown |
| CN107180614A (en) * | 2017-06-26 | 2017-09-19 | 奇瑞汽车股份有限公司 | Vehicle-carrying display screen automatic recovery system, control method and back of the body optical detection circuit |
| US20210305897A1 (en) * | 2020-03-25 | 2021-09-30 | Rohm Co., Ltd. | Power supply controller |
| CN113113894A (en) * | 2021-05-12 | 2021-07-13 | 天合光能股份有限公司 | Power failure detection and power supply protection circuit |
| CN114690876A (en) * | 2022-03-17 | 2022-07-01 | 中汽创智科技有限公司 | System state monitoring reset circuit |
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