CN118033450A - Fault diagnosis method and system of fuel cell automobile and fuel cell automobile - Google Patents

Abstract

The invention provides a fault diagnosis method and a system of a fuel cell automobile and the fuel cell automobile, and relates to the field of fault diagnosis control of fuel cell systems. The method has clear and definite progressive hierarchical relation when the fault diagnosis is carried out on the hydrogen storage system, can realize that the fault of the next hierarchy is triggered and restrained by the fault of the previous hierarchy, ensures that the fault is clearer and is easy to check, and solves the problems of disordered time sequence and low reliability when the fault diagnosis is carried out on the hydrogen storage system in the prior art.

Description

Fault diagnosis method and system of fuel cell automobile and fuel cell automobile

Technical Field

The present invention relates to the field of fault diagnosis and control of fuel cell systems, and in particular, to a fault diagnosis method and system for a fuel cell vehicle, and a fuel cell vehicle.

Background

The fuel cell automobile generates electricity through a built-in fuel cell system and drives the automobile to run by depending on the electricity, so that the working state of the fuel cell system needs to be monitored in real time in the running process, and the generated faults are diagnosed in time. The hydrogen storage system in the fuel cell system is used as an energy source, a high-pressure hydrogen cylinder and related components are arranged in the hydrogen storage system, and the hydrogen storage system is one of core components of the fuel cell system and has a higher safety level, so that the high-efficiency and reliable fault diagnosis of the hydrogen storage system is particularly critical in the running process of the fuel cell vehicle. Because the hydrogen storage system relates to various sensors, and different sensors correspond to different fault diagnosis logics, the problems of disordered diagnosis time sequence and low reliability of the hydrogen storage system in the prior art often occur when fault diagnosis is carried out.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a method and a system for diagnosing a fault of a fuel cell vehicle, wherein the method comprises performing fault diagnosis on a power supply voltage of a storage battery, performing fault diagnosis on power supply faults of a sensor circuit, a driving circuit and a communication circuit, performing fault diagnosis on operating states of the sensor circuit, the driving circuit and the communication circuit, and performing fault diagnosis on operating states of a hydrogen storage system corresponding to the sensor circuit, the driving circuit and the communication circuit; the method has clear and definite progressive hierarchical relation when the fault diagnosis is carried out on the hydrogen storage system, can realize that the fault of the next hierarchy is triggered and restrained by the fault of the previous hierarchy, ensures that the fault is clearer and is easy to check, and solves the problems of disordered time sequence and low reliability when the fault diagnosis is carried out on the hydrogen storage system in the prior art.

In a first aspect, an embodiment of the present invention provides a fault diagnosis method for a fuel cell vehicle, which is applied to a hydrogen storage system of the fuel cell vehicle, the method including:

when a diagnosis instruction is received, acquiring the power supply voltage of a storage battery of the fuel cell automobile, and judging whether the power supply voltage of the storage battery meets a preset first diagnosis condition or not;

When the power supply voltage of the storage battery meets the first diagnosis condition, respectively acquiring the power supply voltages of a sensor circuit, a driving circuit and a communication circuit of the fuel cell automobile, and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset second diagnosis condition;

When the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the second diagnosis conditions, respectively acquiring the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset third diagnosis conditions or not;

When the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the third diagnosis condition, respectively acquiring the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset fourth diagnosis condition;

And when the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the fourth diagnosis condition, the fault diagnosis of the fuel cell automobile is finished.

In one embodiment, determining whether the power supply voltages of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle satisfy the preset second diagnostic conditions, respectively, includes:

acquiring a power supply voltage threshold range corresponding to a sensor circuit, a driving circuit and a communication circuit in a second diagnosis condition;

And respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit are in the corresponding power supply voltage threshold ranges.

In one embodiment, determining whether the fault parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle satisfy the preset third diagnostic conditions, respectively, includes:

Acquiring a structural parameter threshold range corresponding to a sensor circuit, a driving circuit and a communication circuit in a third diagnosis condition;

And respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit are positioned in the corresponding structural parameter threshold range.

In one embodiment, determining whether the operating parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet the preset fourth diagnostic condition, respectively, includes:

Acquiring a threshold range of working parameters corresponding to a sensor circuit, a driving circuit and a communication circuit in a fourth diagnosis condition; the working parameter threshold range corresponding to the sensor circuit is used for judging the pressure fault and the hydrogen concentration fault of the sensor circuit; the threshold range of the working parameter corresponding to the driving circuit is used for judging the fault of the stoping current of the driving circuit; the working parameter threshold range corresponding to the communication circuit is used for judging the message overtime fault of the communication circuit;

And respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit are positioned in the corresponding working parameter threshold ranges.

In one embodiment, when the battery supply voltage does not meet the preset first diagnostic condition, the method further comprises:

The failure diagnosis process of the fuel cell vehicle is stopped, and a first failure code is generated.

In one embodiment, when the power supply voltages of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle do not satisfy the second diagnostic condition, the method further includes:

acquiring circuits which do not meet a second diagnosis condition in the sensor circuit, the driving circuit and the communication circuit;

The fault diagnosis process of the circuit is stopped and a second fault code is generated.

In one embodiment, when the operating voltages of the sensor circuit, the drive circuit, and the communication circuit of the fuel cell vehicle do not satisfy the third diagnostic condition, the method further comprises:

acquiring a circuit which does not meet a third diagnosis condition in the sensor circuit, the driving circuit and the communication circuit;

The fault diagnosis process of the circuit is stopped and a third fault code is generated.

In one embodiment, when the operating parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle do not satisfy the fourth diagnostic condition, the method further comprises:

acquiring a circuit which does not meet a fourth diagnosis condition in the sensor circuit, the driving circuit and the communication circuit;

The fault diagnosis process of the circuit is stopped and a fourth fault code is generated.

In a second aspect, an embodiment of the present invention further provides a fault diagnosis system for a fuel cell vehicle, the system being applied to a hydrogen storage system of the fuel cell vehicle, the system including:

The initialization module is used for acquiring the power supply voltage of the storage battery of the fuel cell automobile when the diagnosis instruction is received, and judging whether the power supply voltage of the storage battery meets a preset first diagnosis condition or not;

The first diagnosis module is used for respectively acquiring the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile when the power supply voltage of the storage battery meets the first diagnosis condition and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset second diagnosis condition;

The second diagnosis module is used for respectively acquiring structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile when the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet second diagnosis conditions, and respectively judging whether the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet preset third diagnosis conditions;

The third diagnosis module is used for respectively acquiring the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile when the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet third diagnosis conditions, and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet preset fourth diagnosis conditions;

and the fourth diagnosis module is used for ending the fault diagnosis of the fuel cell automobile when the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the fourth diagnosis condition.

In a third aspect, an embodiment of the present invention further provides a fuel cell vehicle, including: a hydrogen storage system and a control unit; wherein the control unit performs the above-mentioned failure diagnosis method of the fuel cell vehicle of the first aspect in the process of controlling the hydrogen storage system for failure diagnosis.

In a fourth aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, where the memory stores computer-executable instructions that can be executed by the processor, where the processor executes the computer-executable instructions to implement the fault diagnosis method of the fuel cell vehicle of any one of the first aspects.

In a fifth aspect, embodiments of the present invention further provide a computer-readable storage medium storing computer-executable instructions that, when invoked and executed by a processor, cause the processor to implement the fault diagnosis method for a fuel cell vehicle provided in the first aspect.

The invention provides a fault diagnosis method and system for a fuel cell automobile and the fuel cell automobile, wherein the method is used for carrying out fault diagnosis on a hydrogen storage system of the fuel cell automobile in the working period of the fuel cell automobile, acquiring the power supply voltage of a storage battery of the fuel cell automobile when a diagnosis instruction is received, and judging whether the power supply voltage of the storage battery meets a preset first diagnosis condition; when the power supply voltage of the storage battery meets the first diagnosis condition, respectively acquiring the power supply voltages of a sensor circuit, a driving circuit and a communication circuit of the fuel cell automobile, and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset second diagnosis condition; when the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the second diagnosis conditions, respectively acquiring the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset third diagnosis conditions or not; when the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the third diagnosis condition, respectively acquiring the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset fourth diagnosis condition; and when the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the fourth diagnosis condition, the fault diagnosis of the fuel cell automobile is finished. The method comprises the steps of performing fault diagnosis on power supply voltage of a storage battery, performing fault diagnosis on power supply faults of a sensor circuit, a driving circuit and a communication circuit, performing fault diagnosis on working states of the sensor circuit, the driving circuit and the communication circuit, and performing fault diagnosis on working states of a hydrogen storage system corresponding to the sensor circuit, the driving circuit and the communication circuit; the method has clear and definite progressive hierarchical relation when the fault diagnosis is carried out on the hydrogen storage system, can realize that the fault of the next hierarchy is triggered and restrained by the fault of the previous hierarchy, ensures that the fault is clearer and is easy to check, and solves the problems of disordered time sequence and low reliability when the fault diagnosis is carried out on the hydrogen storage system in the prior art.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of a fault diagnosis method of a fuel cell vehicle according to an embodiment of the present invention;

Fig. 2 is a flowchart for respectively judging whether the power supply voltages of a sensor circuit, a driving circuit and a communication circuit of the fuel cell automobile meet a preset second diagnosis condition in the fault diagnosis method of the fuel cell automobile according to the embodiment of the invention;

FIG. 3 is a flowchart of a method for diagnosing a fault of a fuel cell vehicle according to an embodiment of the present invention, wherein the method includes determining whether fault parameters of a sensor circuit, a driving circuit, and a communication circuit of the fuel cell vehicle meet a preset third diagnosis condition;

Fig. 4 is a flowchart of a fault diagnosis method for a fuel cell vehicle according to an embodiment of the present invention, where whether working parameters of a sensor circuit, a driving circuit, and a communication circuit of the fuel cell vehicle meet a preset fourth diagnosis condition is determined;

fig. 5 is a flowchart of a fault diagnosis method of a second fuel cell vehicle according to an embodiment of the present invention;

fig. 6 is a flowchart of a fault diagnosis method of a third fuel cell vehicle according to an embodiment of the present invention;

Fig. 7 is a flowchart of a fault diagnosis method of a fourth fuel cell vehicle according to an embodiment of the present invention;

fig. 8 is a flowchart of a fault diagnosis method of a fifth fuel cell vehicle according to an embodiment of the present invention;

fig. 9 is a flowchart of a fault diagnosis method of a sixth fuel cell vehicle according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a fault diagnosis system of a fuel cell vehicle according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a fuel cell vehicle according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Icon:

1010-initializing a module; 1020-a first diagnostic module; 1030-a second diagnostic module; 1040-a third diagnostic module; 1050-a fourth diagnostic module;

1110-a hydrogen storage system; 1120-a control unit;

a 101-processor; 102-memory; 103-bus; 104-communication interface.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The fuel cell automobile generates electricity through a built-in fuel cell system and drives the automobile to run by depending on the electricity, so that the working state of the fuel cell system needs to be monitored in real time in the running process, and the generated faults are diagnosed in time. The hydrogen storage system in the fuel cell system is used as an energy source, a high-pressure hydrogen cylinder and related components are arranged in the hydrogen storage system, and the hydrogen storage system is one of core components of the fuel cell system and has a higher safety level, so that the high-efficiency and reliable fault diagnosis of the hydrogen storage system is particularly critical in the running process of the fuel cell vehicle. Because the hydrogen storage system relates to various sensors, and different sensors correspond to different fault diagnosis logics, the problems of disordered diagnosis time sequence and low reliability of the hydrogen storage system in the prior art often occur when fault diagnosis is carried out. Based on the above, the invention provides a fault diagnosis method and system for a fuel cell automobile and the fuel cell automobile, the method comprises the steps of firstly carrying out fault diagnosis on power supply voltage of a storage battery, then carrying out fault diagnosis on power supply faults of a sensor circuit, a driving circuit and a communication circuit, then carrying out fault diagnosis on working states of the sensor circuit, the driving circuit and the communication circuit, and finally carrying out fault diagnosis on working states of a hydrogen storage system corresponding to the sensor circuit, the driving circuit and the communication circuit; therefore, the method has clear and definite progressive hierarchical relation when the fault diagnosis is carried out on the hydrogen storage system, can realize that the fault of the next hierarchy is triggered and restrained by the fault of the previous hierarchy, enables the fault to be clearer and easy to check, and solves the problems of disordered time sequence and low reliability when the fault diagnosis is carried out on the hydrogen storage system in the prior art.

For the sake of understanding the present embodiment, first, a method for diagnosing a fault of a fuel cell vehicle according to an embodiment of the present invention is described in detail, and the method is applied to a hydrogen storage system of a fuel cell vehicle, as shown in fig. 1, and includes:

Step S101, when a diagnosis command is received, a battery power supply voltage of the fuel cell vehicle is obtained, and it is determined whether the battery power supply voltage satisfies a preset first diagnosis condition.

The diagnostic command is usually executed after a start command of the fuel cell vehicle, and in a practical scenario, the diagnostic command may be set in the start command, and when the start command is triggered by a user, the diagnostic command may be triggered simultaneously. The storage battery supplies electricity for the whole vehicle of the fuel cell automobile, namely KL30 electricity. In a practical scenario the fuel cell car also comprises key electricity, i.e. KL15 electricity. The key power may also be used as a trigger condition for a diagnostic command to begin performing the fault diagnosis process when the KL15 is powered up. The fault diagnosis process firstly carries out fault diagnosis on the power supply voltage of the storage battery, namely carries out fault diagnosis on the KL30 voltage. And finally determining whether the power supply voltage of the storage battery meets the requirement or not by judging whether the power supply voltage of the storage battery meets the preset first diagnosis condition or not. The specific implementation process is implemented through a first diagnosis condition, and the first diagnosis condition in the actual scene can be a judgment condition of a related voltage threshold value or a judgment condition of a voltage threshold value range. When the first diagnostic condition is a judgment condition of the voltage threshold, the first diagnostic condition may be set not higher than the voltage threshold, or may be set not lower than the voltage threshold; when the first diagnostic condition is a judgment condition of a voltage threshold range, the first diagnostic condition may be set to satisfy the voltage threshold range.

Step S102, when the power supply voltage of the storage battery meets the first diagnosis condition, the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile are respectively obtained, and whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset second diagnosis condition is respectively judged.

When the power supply voltage of the storage battery meets a first diagnosis condition, the storage battery is normally powered, and corresponding fault detection is performed by using a related sensor circuit, a driving circuit and a communication circuit which are arranged in the hydrogen storage system. Firstly, fault diagnosis is carried out on the power supply voltages of the sensor circuit, the driving circuit and the communication circuit, the thought of the step is similar to the diagnosis process of the power supply voltage of the storage battery in the step S101, and the power supply voltages of the sensor circuit, the driving circuit and the communication circuit are respectively judged according to second diagnosis conditions. Specifically, step S102 is to diagnose the power supply of the sensor circuit, the driving circuit, and the communication circuit using the second diagnosis condition, and essentially to diagnose the fault of the relevant power supply voltage.

Step S103, when the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the second diagnosis conditions, respectively acquiring the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset third diagnosis conditions.

The power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the second diagnosis condition, which means that the power supply of the sensor circuit, the driving circuit and the communication circuit is normal, no power supply fault exists, and at the moment, the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile are obtained, and the structural parameters are subjected to fault diagnosis by utilizing the third diagnosis condition. Specifically, the structural parameters can be understood as initialization parameters of the sensor circuit, the driving circuit and the communication circuit, and whether the sensor circuit, the driving circuit and the communication circuit meet the initialization requirements is obtained through the structural parameters.

Step S104, when the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the third diagnosis condition, respectively acquiring the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset fourth diagnosis condition.

The power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the third diagnosis condition, which means that the initialization of the sensor circuit, the driving circuit and the communication circuit is normal, and no power supply fault exists. Specifically, the working parameters refer to related data collected by the sensor circuit, the driving circuit and the communication circuit, such as sensor data collected by the sensor circuit, driving response data collected by the driving circuit and communication message data collected by the communication circuit, whether the data meets the requirements corresponding to the fourth diagnosis condition or not.

In step S105, when the operating parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle satisfy the fourth diagnosis condition, the fault diagnosis of the fuel cell vehicle is ended.

When the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the fourth diagnosis condition, the working parameters of the sensor circuit, the driving circuit and the communication circuit meet the requirement of using functions, no faults exist, the fault diagnosis of the fuel cell automobile is finished, and the hydrogen storage system of the fuel cell automobile does not contain any faults.

In one embodiment, determining whether the power supply voltages of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle satisfy the preset second diagnostic conditions, respectively, includes:

step S201, obtaining a power supply voltage threshold range corresponding to the sensor circuit, the driving circuit, and the communication circuit in the second diagnosis condition.

It should be noted that, in the second diagnostic condition, the power supply voltage threshold ranges corresponding to the sensor circuit, the driving circuit and the communication circuit are different from each other, and the different power supply voltage threshold ranges correspond to the judgment requirements of the respective circuits.

Step S202, judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit are in the corresponding power supply voltage threshold ranges or not respectively.

In a practical scenario, the sensor circuit may be a circuit corresponding to 5V, 12V or other voltages, and whether the power supply fault exists or not is determined by judging whether the power supply voltage of the sensor circuit corresponding to different voltages is in a corresponding power supply voltage threshold range. The power supply voltage threshold range is the power supply requirement of the sensor circuit, and generally, when the power supply voltage of the sensor circuit is in the corresponding power supply voltage threshold range, the power supply of the sensor circuit can be considered to be normal. The drive circuit and the communication circuit are similar to the sensor circuit in judgment concept, and are not described herein.

In one embodiment, determining whether the fault parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet the preset third diagnostic conditions, respectively, includes:

Step S301, obtaining a structural parameter threshold range corresponding to the sensor circuit, the driving circuit, and the communication circuit in the third diagnostic condition.

In the third diagnosis condition, the threshold ranges of the structural parameters corresponding to the sensor circuit, the driving circuit and the communication circuit are different from each other, and the different threshold ranges of the structural parameters correspond to the judgment requirements of the respective circuits.

Step S302, whether the working parameters of the sensor circuit, the driving circuit and the communication circuit are located in the corresponding structural parameter threshold ranges is judged.

Whether the structural fault exists or not is determined by judging whether the structural parameter of the sensor circuit is located in the corresponding structural parameter threshold range. The structural parameter threshold range is the initialization requirement of the sensor circuit, and generally, when the structural parameter of the sensor circuit is located in the corresponding structural parameter threshold range, the sensor circuit can be considered to be initialized normally. The drive circuit and the communication circuit are similar to the sensor circuit in judgment concept, and are not described herein.

Through the steps, whether the sensor circuit, the driving circuit and the communication circuit meet related initialization requirements or not can be obtained, if not, the sensor circuit, the driving circuit and the communication circuit are considered to generate initialization faults; if the requirements are met, such faults are not triggered and the next fault diagnosis process is entered.

In one embodiment, determining whether the operating parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet the preset fourth diagnosis condition, as shown in fig. 4, includes:

Step S401, acquiring a threshold range of working parameters corresponding to a sensor circuit, a driving circuit and a communication circuit in a fourth diagnosis condition;

In the fourth diagnosis condition, the threshold ranges of the working parameters corresponding to the sensor circuit, the driving circuit and the communication circuit are different from each other, and the different threshold ranges of the working parameters correspond to the judgment requirements of the respective circuits. The working parameter threshold range corresponding to the sensor circuit is used for judging the pressure fault and the hydrogen concentration fault of the sensor circuit; the threshold range of the working parameter corresponding to the driving circuit is used for judging the fault of the stoping current of the driving circuit; the working parameter threshold range corresponding to the communication circuit is used for judging the message overtime fault of the communication circuit.

Step S402, judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit are located in the corresponding working parameter threshold ranges or not respectively.

And determining whether the structural fault exists by judging whether the working parameters of the sensor circuit are in the corresponding working parameter threshold value range. The working parameter threshold range is the data acquisition requirement of the sensor circuit, and generally, when the working parameter of the sensor circuit is positioned in the corresponding working parameter threshold range, the hydrogen storage system corresponding to the sensor circuit can be considered to work normally. The drive circuit and the communication circuit are similar to the sensor circuit in judgment concept, and are not described herein.

Through the steps, whether the sensor circuit, the driving circuit and the communication circuit meet relevant working requirements or not can be obtained, and if the sensor circuit, the driving circuit and the communication circuit are not met, the sensor circuit is considered to have faults corresponding to the hydrogen storage system. For example, when the data collected by the sensor circuit does not accord with the corresponding operating parameter threshold range, the sensor circuit indicates that the related element of the hydrogen storage system corresponding to the sensor circuit has faults; when the data collected by the driving circuit does not accord with the corresponding working parameter threshold range, the related driving circuit of the hydrogen storage system is indicated to have faults; and when the message data collected by the communication circuit does not accord with the corresponding working parameter threshold range, indicating that the communication circuit of the hydrogen storage system fails.

In the process of handling the failure, as shown in fig. 5, the failure diagnosis method of the fuel cell vehicle includes:

step S501, when a diagnosis instruction is received, acquiring the power supply voltage of a storage battery of the fuel cell automobile, and judging whether the power supply voltage of the storage battery meets a preset first diagnosis condition;

Step S502, when the battery power supply voltage does not meet the preset first diagnosis condition, stopping the fault diagnosis process of the fuel cell vehicle and generating a first fault code.

When the power supply of the storage battery fails, the fault diagnosis process of the fuel cell automobile is stopped, the fault diagnosis of the subsequent steps is stopped, and a first fault code is generated. The first fault code corresponds to a battery power failure, and a user can directly determine that the failure is the battery power failure through the first fault code.

In one embodiment, as shown in fig. 6, the fault diagnosis method of the fuel cell vehicle includes:

Step S601, when a diagnosis instruction is received, acquiring the power supply voltage of a storage battery of the fuel cell automobile, and judging whether the power supply voltage of the storage battery meets a preset first diagnosis condition;

Step S602, when the power supply voltage of the storage battery meets the first diagnosis condition, respectively acquiring the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset second diagnosis condition;

Step S603, when the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile do not meet the second diagnosis conditions, acquiring the circuits of the sensor circuit, the driving circuit and the communication circuit which do not meet the second diagnosis conditions;

In step S604, the fault diagnosis process of the circuit is stopped, and a second fault code is generated.

When the power supply of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile has faults, stopping the subsequent fault diagnosis process of the circuit corresponding to the faults, and generating a second fault code corresponding to the circuit. The second fault code corresponds to a power failure of the circuit, and a user can directly determine the circuit generating the power failure through the second fault code.

In one embodiment, as shown in fig. 7, the fault diagnosis method of the fuel cell vehicle includes:

step S701, when a diagnosis instruction is received, acquiring a storage battery power supply voltage of the fuel cell automobile, and judging whether the storage battery power supply voltage meets a preset first diagnosis condition;

Step S702, when the power supply voltage of the storage battery meets the first diagnosis condition, respectively acquiring the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset second diagnosis condition;

Step S703, when the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell vehicle meet the second diagnostic conditions, respectively obtaining the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell vehicle, and respectively judging whether the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell vehicle meet the preset third diagnostic conditions;

step S704, when the working voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile do not meet the third diagnosis condition, acquiring the circuits which do not meet the third diagnosis condition in the sensor circuit, the driving circuit and the communication circuit;

step S705, the fault diagnosis process of the circuit is stopped, and a third fault code is generated.

When the initialization of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile has faults, stopping the subsequent fault diagnosis process of the circuit corresponding to the faults, and generating a third fault code corresponding to the circuit. The third fault code corresponds to the initialization fault of the circuit, and the user can directly determine the circuit generating the initialization fault through the third fault code.

In one embodiment, as shown in fig. 8, the fault diagnosis method of the fuel cell vehicle includes:

Step S801, when a diagnosis instruction is received, acquiring a storage battery power supply voltage of the fuel cell automobile, and judging whether the storage battery power supply voltage meets a preset first diagnosis condition;

Step S802, when the power supply voltage of the storage battery meets the first diagnosis condition, respectively acquiring the power supply voltages of a sensor circuit, a driving circuit and a communication circuit of the fuel cell automobile, and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset second diagnosis condition;

Step S803, when the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the second diagnosis conditions, respectively acquiring the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset third diagnosis conditions;

Step S804, when the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the third diagnosis condition, respectively acquiring the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset fourth diagnosis condition;

Step S805, when the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile do not meet the fourth diagnosis condition, acquiring the circuit which does not meet the fourth diagnosis condition in the sensor circuit, the driving circuit and the communication circuit;

step S806, the fault diagnosis process of the circuit is stopped, and a fourth fault code is generated.

When the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile have faults, a fourth fault code corresponding to the circuit is generated. The fourth fault code is a fault corresponding to the circuit in the hydrogen storage system, and a user can directly determine related elements generating faults in the hydrogen storage system through the fourth fault code.

Specifically, the above-described process is described in its entirety by the failure diagnosis method of the fuel cell vehicle shown in fig. 9. Firstly, controlling the KL30 to be powered on; then judging whether the KL15 is powered on or not, or other power-on modes are available to wake up the fault diagnosis method. If yes, the diagnosis instruction is considered to be received, whether the KL30 power supply voltage meets the requirement is judged, and the specific implementation process is realized by judging whether the storage battery power supply voltage meets the preset first diagnosis condition. If not, reporting KL30 power failure and inhibiting other failures; if so, the subsequent steps are performed.

When the power supply voltage of the storage battery meets the first diagnosis condition, the power supply voltages of the 5V sensor circuit, the 12V sensor circuit, the driving circuit and the communication circuit are respectively obtained, whether the respective power supplies meet the requirements or not is respectively judged, and the specific implementation process is realized by judging whether the power supply voltages of the circuits meet the preset second diagnosis condition or not. If yes, executing the subsequent steps; if not, the related power supply fault is triggered, and the system fault related to the circuit is restrained.

When the second diagnosis condition is met, whether the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the related requirements or not is judged by acquiring the structural parameters of the sensor circuit, the driving circuit and the communication circuit. The specific implementation process is realized by judging whether the structural parameters of the circuit meet a preset third diagnosis condition. For example, for a 5V sensor circuit, if so, then the subsequent steps are performed; if not, a related structure fault is triggered and a system fault related to the circuit is suppressed. For example, in the case of a 5V sensor circuit, if it is determined that the 5V sensor circuit is not satisfactory, the 5V triggers a circuit failure of the sensor and suppresses a system failure associated with the sensor; the structural failure of other circuits is specifically shown in fig. 9, and will not be described again.

When the third diagnosis condition is met, whether the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the related requirements or not is judged by acquiring the working parameters of the sensor circuit, the driving circuit and the communication circuit. The specific implementation process is realized by judging whether the working parameters of the circuit meet the preset fourth diagnosis condition. For example, for a 5V sensor circuit, the high voltage, medium voltage and other operating parameters collected by such sensors are respectively judged to determine whether the corresponding high voltage faults, medium voltage faults and other faults exist; for a 12V sensor circuit, it may be determined whether there is a hydrogen concentration fault by determining the operating parameters collected by the hydrogen concentration sensor in such a sensor; for the driving circuit, whether a driving related fault exists or not can be determined by judging whether the driving recovery current meets the requirement or not; for the communication circuit, whether to trigger the overtime fault of the communication message can be determined by judging whether the overtime of the message meets the requirement.

According to the fault diagnosis method of the fuel cell automobile, the fault diagnosis is carried out on the power supply voltage of the storage battery, then the power supply faults of the sensor circuit, the driving circuit and the communication circuit are diagnosed, then the fault diagnosis is carried out on the working states of the sensor circuit, the driving circuit and the communication circuit, and finally the fault diagnosis is carried out on the working states of the hydrogen storage system corresponding to the sensor circuit, the driving circuit and the communication circuit. Therefore, the method has clear and definite progressive hierarchical relation when the fault diagnosis is carried out on the hydrogen storage system, can realize that the fault of the next hierarchy is triggered and restrained by the fault of the previous hierarchy, enables the fault to be clearer and easy to check, and solves the problems of disordered time sequence and low reliability when the fault diagnosis is carried out on the hydrogen storage system in the prior art.

For the fault diagnosis method of the fuel cell vehicle provided in the foregoing embodiment, the embodiment of the present invention provides a fault diagnosis system of the fuel cell vehicle, which is applied to a hydrogen storage system of the fuel cell vehicle, as shown in fig. 10, and includes:

an initialization module 1010, configured to obtain a battery power supply voltage of the fuel cell vehicle when a diagnostic instruction is received, and determine whether the battery power supply voltage meets a preset first diagnostic condition;

The first diagnostic module 1020 is configured to, when the power supply voltage of the storage battery meets a first diagnostic condition, respectively obtain the power supply voltages of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle, and respectively determine whether the power supply voltages of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet a preset second diagnostic condition;

The second diagnostic module 1030 is configured to, when the power supply voltages of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet the second diagnostic conditions, respectively obtain structural parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle, and respectively determine whether the structural parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet preset third diagnostic conditions;

The third diagnostic module 1040 is configured to, when structural parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet third diagnostic conditions, respectively obtain working parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle, and respectively determine whether the working parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet preset fourth diagnostic conditions;

The fourth diagnosing module 1050 is configured to end the fault diagnosis of the fuel cell vehicle when the operating parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle meet the fourth diagnosing condition.

The fault diagnosis system of the fuel cell automobile provided by the embodiment of the invention is characterized in that firstly, fault diagnosis is carried out on the power supply voltage of a storage battery, then the power supply faults of a sensor circuit, a driving circuit and a communication circuit are diagnosed, then the working states of the sensor circuit, the driving circuit and the communication circuit are subjected to fault diagnosis, and finally the working states of a hydrogen storage system corresponding to the sensor circuit, the driving circuit and the communication circuit are subjected to fault diagnosis; the fault diagnosis of the fuel cell automobile has clear and definite progressive hierarchical relation when the fault diagnosis is carried out on the hydrogen storage system, can realize that the fault of the next hierarchy is triggered and restrained by the fault of the previous hierarchy, ensures that the fault is clearer and is easy to be checked, and solves the problems of disordered time sequence and low reliability when the fault diagnosis is carried out on the hydrogen storage system in the prior art.

In one embodiment, the first diagnostic module 1020 is further configured to obtain a power supply voltage threshold range corresponding to the sensor circuit, the driving circuit, and the communication circuit in the second diagnostic condition; and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit are in the corresponding power supply voltage threshold ranges.

In one embodiment, the second diagnostic module 1030 is further configured to: acquiring a structural parameter threshold range corresponding to a sensor circuit, a driving circuit and a communication circuit in a third diagnosis condition; and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit are positioned in the corresponding structural parameter threshold range.

In one embodiment, the third diagnostic module 1040 is further configured to: acquiring a threshold range of working parameters corresponding to a sensor circuit, a driving circuit and a communication circuit in a fourth diagnosis condition; the working parameter threshold range corresponding to the sensor circuit is used for judging the pressure fault and the hydrogen concentration fault of the sensor circuit; the threshold range of the working parameter corresponding to the driving circuit is used for judging the fault of the stoping current of the driving circuit; the working parameter threshold range corresponding to the communication circuit is used for judging the message overtime fault of the communication circuit; and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit are positioned in the corresponding working parameter threshold ranges.

In one embodiment, the fault diagnosis system of a fuel cell vehicle further includes: a first fault handling module; when the power supply voltage of the storage battery does not meet a preset first diagnosis condition, the first fault processing module is used for: the failure diagnosis process of the fuel cell vehicle is stopped, and a first failure code is generated.

In one embodiment, the fault diagnosis system of a fuel cell vehicle further includes: a second fault handling module; when the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile do not meet the second diagnosis condition, the second fault processing module is used for: acquiring circuits which do not meet a second diagnosis condition in the sensor circuit, the driving circuit and the communication circuit; the fault diagnosis process of the circuit is stopped and a second fault code is generated.

In one embodiment, the fault diagnosis system of a fuel cell vehicle further includes: a third fault handling module; when the operating voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile do not meet the third diagnosis condition, the third fault processing module is used for: acquiring a circuit which does not meet a third diagnosis condition in the sensor circuit, the driving circuit and the communication circuit; the fault diagnosis process of the circuit is stopped and a third fault code is generated.

In one embodiment, the fault diagnosis system of a fuel cell vehicle further includes: a fourth fault handling module; when the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile do not meet the fourth diagnosis condition, the fourth fault processing module is further used for: acquiring a circuit which does not meet a fourth diagnosis condition in the sensor circuit, the driving circuit and the communication circuit; the fault diagnosis process of the circuit is stopped and a fourth fault code is generated.

The fault diagnosis system of the fuel cell automobile provided by the embodiment of the invention has the same implementation principle and technical effects as those of the embodiment of the method, and for the purposes of brief description, the corresponding contents in the embodiment of the method can be referred to for the parts of the embodiment of the device which are not mentioned.

An embodiment of the present invention provides a fuel cell vehicle, as shown in fig. 11, including: a hydrogen storage system 1110 and a control unit 1120; wherein the control unit 1120 performs the fault diagnosis method of the fuel cell vehicle mentioned in the above-described embodiment in the process of controlling the hydrogen storage system 1110 for fault diagnosis.

The embodiment also provides an electronic device, the structural schematic diagram of which is shown in fig. 12, the device includes a processor 101 and a memory 102; the memory 102 is configured to store one or more computer instructions, where the one or more computer instructions are executed by the processor to implement the above-described fault diagnosis method for a fuel cell vehicle.

The electronic device shown in fig. 12 further comprises a bus 103 and a communication interface 104, the processor 101, the communication interface 104 and the memory 102 being connected by the bus 103.

The memory 102 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. Bus 103 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 12, but not only one bus or type of bus.

The communication interface 104 is configured to connect with at least one user terminal and other network units through a network interface, and send the encapsulated IPv4 message or the IPv4 message to the user terminal through the network interface.

The processor 101 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 101 or instructions in the form of software. The processor 101 may be a general-purpose processor, including a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), and the like; but may also be a digital signal Processor (DIGITAL SIGNAL Processor, DSP), application Specific Integrated Circuit (ASIC), field-Programmable gate array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps and logic blocks of the disclosure in the embodiments of the disclosure may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present disclosure may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 102, and the processor 101 reads information in the memory 102, and in combination with its hardware, performs the steps of the method of the previous embodiment.

The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of the preceding embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, indirect coupling or communication connection of devices or units, electrical, mechanical, or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A fault diagnosis method of a fuel cell vehicle, the method being applied to a hydrogen storage system of a fuel cell vehicle, the method comprising:

When a diagnosis instruction is received, acquiring the power supply voltage of a storage battery of the fuel cell automobile, and judging whether the power supply voltage of the storage battery meets a preset first diagnosis condition or not;

When the power supply voltage of the storage battery meets the first diagnosis condition, respectively acquiring the power supply voltages of a sensor circuit, a driving circuit and a communication circuit of the fuel cell automobile, and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet a preset second diagnosis condition;

When the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the second diagnosis conditions, respectively acquiring structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet preset third diagnosis conditions or not;

When the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the third diagnosis condition, respectively acquiring the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile, and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet a preset fourth diagnosis condition;

And when the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the fourth diagnosis condition, the fault diagnosis of the fuel cell automobile is finished.

2. The fault diagnosis method of a fuel cell vehicle according to claim 1, wherein determining whether or not the power supply voltages of the sensor circuit, the drive circuit, and the communication circuit of the fuel cell vehicle satisfy preset second diagnosis conditions, respectively, comprises:

Acquiring a power supply voltage threshold range corresponding to the sensor circuit, the driving circuit and the communication circuit in the second diagnosis condition;

and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit are in the corresponding power supply voltage threshold ranges.

3. The fault diagnosis method of a fuel cell vehicle according to claim 1, wherein determining whether the fault parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle satisfy preset third diagnosis conditions, respectively, comprises:

acquiring a structural parameter threshold range corresponding to the sensor circuit, the driving circuit and the communication circuit in the third diagnosis condition;

And respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit are positioned in the corresponding structural parameter threshold range.

4. The fault diagnosis method of a fuel cell vehicle according to claim 1, wherein determining whether the operating parameters of the sensor circuit, the driving circuit, and the communication circuit of the fuel cell vehicle satisfy preset fourth diagnosis conditions, respectively, comprises:

Acquiring working parameter threshold ranges corresponding to the sensor circuit, the driving circuit and the communication circuit in the fourth diagnosis condition; the working parameter threshold range corresponding to the sensor circuit is used for judging the pressure fault and the hydrogen concentration fault of the sensor circuit; the working parameter threshold range corresponding to the driving circuit is used for judging the fault of the recovery current of the driving circuit; the working parameter threshold range corresponding to the communication circuit is used for judging the overtime fault of the message of the communication circuit;

and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit are positioned in the corresponding working parameter threshold ranges.

5. The fault diagnosis method of a fuel cell vehicle according to claim 1, characterized in that when the battery power supply voltage does not satisfy a preset first diagnosis condition, the method further comprises:

and stopping the fault diagnosis process of the fuel cell automobile and generating a first fault code.

6. The fault diagnosis method of a fuel cell vehicle according to claim 1 or 2, characterized in that when the power supply voltages of the sensor circuit, the drive circuit, the communication circuit of the fuel cell vehicle do not satisfy the second diagnosis condition, the method further comprises:

Acquiring circuits which do not meet the second diagnosis condition in the sensor circuit, the driving circuit and the communication circuit;

and stopping the fault diagnosis process of the circuit and generating a second fault code.

7. The fault diagnosis method of a fuel cell vehicle according to claim 1 or 3, characterized in that when the operating voltages of the sensor circuit, the drive circuit, the communication circuit of the fuel cell vehicle do not satisfy the third diagnosis condition, the method further comprises:

Acquiring a circuit which does not meet the third diagnosis condition in the sensor circuit, the driving circuit and the communication circuit;

And stopping the fault diagnosis process of the circuit and generating a third fault code.

8. The fault diagnosis method of a fuel cell vehicle according to claim 1 or 4, characterized in that when the operation data of the sensor circuit, the driving circuit, the communication circuit of the fuel cell vehicle does not satisfy the fourth diagnosis condition, the method further comprises:

acquiring circuits which do not meet the fourth diagnosis condition in the sensor circuit, the driving circuit and the communication circuit;

and stopping the fault diagnosis process of the circuit and generating a fourth fault code.

9. A fault diagnosis system of a fuel cell vehicle, the system being applied to a hydrogen storage system of a fuel cell vehicle, the system comprising:

The initialization module is used for acquiring the power supply voltage of the storage battery of the fuel cell automobile when a diagnosis instruction is received, and judging whether the power supply voltage of the storage battery meets a preset first diagnosis condition or not;

the first diagnosis module is used for respectively acquiring the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile when the power supply voltage of the storage battery meets the first diagnosis condition, and respectively judging whether the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the preset second diagnosis condition;

The second diagnosis module is used for respectively acquiring structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile when the power supply voltages of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the second diagnosis conditions, and respectively judging whether the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet preset third diagnosis conditions;

The third diagnosis module is used for respectively acquiring the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile when the structural parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the third diagnosis conditions, and respectively judging whether the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet preset fourth diagnosis conditions;

And the fourth diagnosis module is used for ending the fault diagnosis of the fuel cell automobile when the working parameters of the sensor circuit, the driving circuit and the communication circuit of the fuel cell automobile meet the fourth diagnosis condition.

10. A fuel cell vehicle, comprising at least: a hydrogen storage system and a control unit; wherein the control unit performs the failure diagnosis method of the fuel cell vehicle according to any one of the above claims 1 to 8 in the process of controlling the hydrogen storage system for failure diagnosis.