WO2024056002A1

WO2024056002A1 - Abnormality handling method and system for hydrogen circulation pump, and electronic device

Info

Publication number: WO2024056002A1
Application number: PCT/CN2023/118633
Authority: WO
Inventors: 贺军成; 杨奕; 袁磊; 崔天宇
Original assignee: 未势能源科技有限公司
Priority date: 2022-09-14
Filing date: 2023-09-13
Publication date: 2024-03-21
Also published as: CN117747874A

Abstract

An abnormality handling method and system for a hydrogen circulation pump, and an electronic device, relating to the field of fuel cell system control. The method comprises: during a start self-test of a fuel cell system, determining whether a fault code is present; if no fault code is present, starting the fuel cell system, and acquiring the rotation speed value of a hydrogen circulation pump in real time; and when the rotation speed value of the hydrogen circulation pump is less than a preset rotation speed threshold, determining a first opening strategy of an anode hydrogen discharge valve in the fuel cell system according to a rotation speed difference between the rotation speed value of the hydrogen circulation pump and the rotation speed threshold, and controlling the operation of the fuel cell system by using the first opening strategy. According to the method, opening strategies of hydrogen discharge components in a fuel cell system are determined by using a rotation speed value of a hydrogen circulation pump, so that corresponding fault operation modes can be set according to the different opening strategies; and when an abnormality occurs in the hydrogen circulation pump, the corresponding fault operation mode of the hydrogen circulation pump can be directly and automatically invoked, so that the problem of unreasonable control in the prior art is solved.

Description

Abnormal handling method, system and electronic equipment of hydrogen circulation pump

Cross-references to related applications

This disclosure requests the priority of the Chinese patent application with application number 202211117712.2 and titled "Abnormality Handling Method, System and Electronic Equipment for Hydrogen Circulation Pump" submitted to the State Intellectual Property Office of China on September 14, 2022. The entire content of this application is approved by This reference is incorporated into this disclosure.

Technical field

The present disclosure relates to the field of fuel cell system control, and in particular, to an abnormality handling method, system and electronic equipment for a hydrogen circulation pump.

Background technique

Fuel cell systems are generally equipped with an anode circulation device. The hydrogen circulation pump is a common hydrogen circulation device at the anode and is a high-loss component in the fuel cell system. Once the hydrogen circulation pump gets stuck or the speed cannot meet the set requirements, it will directly cause the fuel cell system to shut down, which poses serious safety risks in fuel cell vehicles or other application scenarios.

At the same time, after the fuel cell system is shut down abnormally, the liquid water generated cannot be discharged in time, which will cause the fuel cell stack to be flooded, causing the stack to have a single low problem, causing irreversible damage to the stack and reducing its service life.

To sum up, the hydrogen circulation pump in the prior art still has the problem of unreasonable control in the process of handling abnormal situations.

Contents of the invention

In view of this, the purpose of the present disclosure is to provide a method, system and electronic equipment for abnormality handling of a hydrogen circulation pump. The method uses the rotation speed value of the hydrogen circulation pump to judge the operating status of the hydrogen circulation pump and determine the various components in the fuel cell system. The opening strategy of similar hydrogen exhaust components can be used to set corresponding fault operation modes according to different opening strategies; when an abnormality occurs in the hydrogen circulation pump, its corresponding fault operation mode can be directly and automatically called, thereby solving the control problems existing in the existing technology. Unreasonable question.

In a first aspect, an embodiment of the present disclosure provides a method for handling an abnormality of a hydrogen circulation pump, where the hydrogen circulation pump is applied to a fuel cell system; the method comprises:

When the fuel cell system starts self-test, determine whether there is a fault code;

If there is no fault code, start the fuel cell system and obtain the speed value of the hydrogen circulation pump in real time;

When the speed value of the hydrogen circulation pump is less than the preset speed threshold, the first opening strategy of the anode hydrogen exhaust valve in the fuel cell system is determined based on the speed difference between the speed value of the hydrogen circulation pump and the speed threshold; wherein, the first The greater the speed difference in the opening strategy, the shorter the closing time of the anode hydrogen exhaust valve;

The operation of the fuel cell system is controlled using the first start-up strategy.

In one embodiment, when the speed value of the hydrogen circulation pump is not less than the preset speed threshold, the operation of the fuel cell system is controlled according to the preset second start-up strategy; wherein, in the second start-up strategy, the anode discharges hydrogen The opening time and closing time of the valve are fixed values.

In one embodiment, in the first opening strategy, the opening time of the anode hydrogen exhaust valve is 0.5 s; for every 5% increase in the rotational speed difference, the closing time of the anode hydrogen exhaust valve is reduced by 1 s;

In the second opening strategy, in the second opening strategy, the opening time of the anode hydrogen exhaust valve is 0.5s; the closing time of the anode hydrogen exhaust valve is 10s.

In one embodiment, when the fuel cell system starts self-test, the step of determining whether there is a fault code includes:

When the fuel cell system receives the power-on command, initialize the FCU controller of the fuel cell system;

Obtain the shutdown data of the fuel cell system from the storage unit of the FCU controller, and determine whether there is a shutdown fault code in the fuel cell system from the shutdown data.

In one implementation, if a fault code exists, the method includes:

Determine the water removal strategy of the fuel cell system based on the content of the fault code; the water removal strategy includes: controlling the flow parameters of the cathode air valve and anode hydrogen exhaust valve in the fuel cell system;

The water removal strategy is used to control the fuel cell system to perform a water removal purge operation.

In one embodiment, in the water removal strategy, the air side flow rate of the cathode air valve of the fuel cell system is not less than 50g/s, and the water removal time is not less than 5s;

The opening frequency of the anode hydrogen exhaust valve of the fuel cell system should be increased by at least 0.5 times the original opening frequency; the speed of the hydrogen circulation pump should not be less than 1,000 rpm.

In one embodiment, after using the water removal strategy to control the fuel cell system to perform a water removal purge operation, the method further includes:

Clear fault codes;

After the fuel cell system completes the water removal and purging operation, start the fuel cell system and obtain the speed value of the hydrogen circulation pump in real time.

Use the moisture sensor in the fuel cell system to obtain the moisture parameters at the stack in the fuel cell system in real time;

When the moisture parameter is lower than the preset moisture threshold and the fault code is cleared, the fuel cell system is started and the speed value of the hydrogen circulation pump is obtained in real time.

In a second aspect, embodiments of the present disclosure also provide an abnormality handling system for a hydrogen circulation pump. The hydrogen circulation pump is used in a fuel cell system; the system includes:

The self-test module is used to determine whether there is a fault code when the fuel cell system starts self-test;

The startup module is used to start the fuel cell system if there is no fault code and obtain the speed value of the hydrogen circulation pump in real time;

The first opening strategy determination module is used to determine the speed of the anode hydrogen exhaust valve in the fuel cell system based on the speed difference between the speed of the hydrogen circulation pump and the speed threshold when the speed of the hydrogen circulation pump is less than the preset speed threshold. The first opening strategy; wherein, the greater the rotation speed difference in the first opening strategy, the shorter the closing time of the anode hydrogen exhaust valve;

A control module used to control the operation of the fuel cell system using the first start-up strategy.

In a third aspect, an embodiment of the present disclosure further provides an electronic device, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement any one of the hydrogen circulation pump abnormality handling methods provided in the first aspect.

In a fourth aspect, embodiments of the present disclosure also provide a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by the processor, the computer-executable instructions cause the processor to Implement the abnormality handling method of the hydrogen circulation pump provided in any one of the first aspects.

Embodiments of the present disclosure provide an abnormality handling method, system and electronic equipment for a hydrogen circulation pump. The hydrogen circulation pump is used in a fuel cell system. The fuel cell system in actual scenarios can be used in fuel cell vehicles; in the case of hydrogen During the control process of the circulation pump, when the fuel cell system starts self-test, it is judged whether there is a fault code; if there is no fault code, the fuel cell system is started and the speed value of the hydrogen circulation pump is obtained in real time; when the speed value of the hydrogen circulation pump When the value is less than the preset speed threshold, the first opening strategy of the anode hydrogen exhaust valve in the fuel cell system is determined based on the speed difference between the speed value of the hydrogen circulation pump and the speed threshold; wherein, the speed difference in the first opening strategy The larger the value, the shorter the closing time of the anode hydrogen exhaust valve; finally, the first opening strategy is used to control the operation of the fuel cell system. This method uses the speed value of the hydrogen circulation pump to judge the operating status of the hydrogen circulation pump and determine the opening strategies of various hydrogen discharge components in the fuel cell system, so that corresponding fault operation modes can be set according to different opening strategies; when the hydrogen circulation When an abnormality occurs in the pump, its corresponding fault operation mode can be directly and automatically called, thus solving the problem of unreasonable control existing in the existing technology.

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

In order to make the above-mentioned objects, features and advantages of the present disclosure more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings.

Description of drawings

In order to more clearly explain the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description picture These are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic flow chart of an abnormality handling method for a hydrogen circulation pump provided by an embodiment of the present disclosure;

Figure 2 is a schematic flowchart of the corresponding operating mode in an abnormality handling method for a hydrogen circulation pump provided by an embodiment of the present disclosure;

Figure 3 is a schematic flowchart of step S101 in an abnormality handling method for a hydrogen circulation pump provided by an embodiment of the present disclosure;

Figure 4 is a schematic flow chart when a fault code exists in an abnormality handling method for a hydrogen circulation pump provided by an embodiment of the present disclosure;

Figure 5 is a schematic flow chart after using a water removal strategy to control the fuel cell system to perform a water removal and purge operation in the abnormality handling method of the hydrogen circulation pump provided by the embodiment of the present disclosure;

Figure 6 is another schematic flow diagram after using a water removal strategy to control the fuel cell system to perform a water removal and purge operation in the abnormality handling method of a hydrogen circulation pump provided by an embodiment of the present disclosure;

Figure 7 is a schematic flowchart of the corresponding operating mode when a fault code exists in the abnormality handling method of a hydrogen circulation pump provided by an embodiment of the present disclosure;

Figure 8 is a schematic structural diagram of an abnormality handling system for a hydrogen circulation pump provided by an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.

icon:
810-Self-check module; 820-Start-up module; 830-First start-up strategy determination module; 840-Control module;
100-electronic equipment; 50-processor; 51-memory; 52-bus; 53-communication interface.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the present disclosure will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of them. Embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this disclosure.

Fuel cell systems are generally equipped with an anode circulation device. The hydrogen circulation pump serves as a circulation device for hydrogen at the anode and is a high-loss component in the fuel cell system. Once the hydrogen circulation pump gets stuck or the speed cannot meet the set requirements, it will directly cause the fuel cell system to shut down, which poses serious safety risks in fuel cell vehicles or other application scenarios. In specific scenarios, fuel cell vehicles with this type of fuel cell system will suffer from insufficient power of the entire vehicle when the hydrogen circulation pump is abnormal. In severe cases, the vehicle may stall, seriously affecting driving safety. Once this problem occurs, the hydrogen circulation pump can only be replaced with a new one, and the replacement process can only be achieved through repair.

At the same time, after the fuel cell system is shut down abnormally, the liquid water generated cannot be discharged in time, which will cause the fuel cell stack to be flooded, causing the stack to have a single low problem, causing irreversible damage to the stack and reducing its use life. When the fuel cell system shuts down abnormally, it is usually necessary to contact maintenance personnel to purge the liquid water for maintenance, which takes a long time.

To sum up, the hydrogen circulation pump in the prior art still has the problem of unreasonable control in the process of handling abnormal situations. Based on this, the present disclosure provides an abnormality handling method, system and electronic equipment for a hydrogen circulation pump. This method uses the rotation speed value of the hydrogen circulation pump to judge the operating status of the hydrogen circulation pump and determine various types of emissions in the fuel cell system. The opening strategy of the hydrogen component can set the corresponding fault operation mode according to different opening strategies; when the hydrogen circulation pump is abnormal, its corresponding fault operation mode can be directly and automatically called, thus solving the unreasonable control existing in the existing technology. The problem.

In order to facilitate understanding of this embodiment, a method for handling abnormality of a hydrogen circulation pump disclosed in an embodiment of the present disclosure is first introduced in detail. The hydrogen circulation pump is used in a fuel cell system; as shown in Figure 1, the method includes:

Step S101: When the fuel cell system starts self-test, determine whether there is a fault code.

During the startup process of the fuel cell system, a self-test process is required to check the working status of each component of the fuel cell system, and at the same time, detect whether any abnormal conditions occurred before the last shutdown. After the fuel cell system shuts down abnormally, the liquid water inside the stack is not discharged. When the fuel cell system is subsequently turned on, the liquid water accumulates inside the fuel cell system and causes damage to the stack. Therefore, when the fuel cell system shuts down abnormally, , a corresponding fault code will be generated to indicate that the fuel cell system has experienced an abnormal shutdown.

Step S102, if there is no fault code, start the fuel cell system and obtain the speed value of the hydrogen circulation pump in real time.

If there is no fault code, it means that the fuel cell system self-test result is normal. At this time, the fuel cell system is started and the operating status of the hydrogen circulation pump is monitored in real time. The monitoring process is realized by using the rotational speed value of the hydrogen circulation pump. When the hydrogen circulation pump is stuck, its rotational speed will inevitably be affected, causing the rotational speed to fail to meet the usage requirements. Therefore, the rotational speed value of the hydrogen circulation pump can be obtained in real time. Judge the working status of the hydrogen circulation pump.

Step S103, when the speed value of the hydrogen circulation pump is less than the preset speed threshold, the first opening strategy of the anode hydrogen exhaust valve in the fuel cell system is determined based on the speed difference between the speed value of the hydrogen circulation pump and the speed threshold; wherein , the greater the speed difference in the first opening strategy, the shorter the closing time of the anode hydrogen exhaust valve.

The preset speed threshold represents the minimum speed of the hydrogen circulation pump in its normal working state. If it is less than the speed threshold, it indicates that the hydrogen circulation pump is stuck, causing the speed to fail to meet the predetermined requirements. Therefore, when the speed of the hydrogen circulation pump is less than the preset speed threshold, it is necessary to increase the degree of hydrogen discharge by increasing the opening frequency and single opening time of the anode hydrogen discharge valve to increase the flow of hydrogen flowing through the stack to meet the requirements System hydrogen supply requirements.

The specific implementation process is to determine the first opening strategy of the anode hydrogen discharge valve in the fuel cell system based on the speed difference between the speed value of the hydrogen circulation pump and the speed threshold. Under the first opening strategy, the degree of hydrogen discharge can be increased, so that The flow of hydrogen through the stack increases.

Step S104: Use the first start-up strategy to control the operation of the fuel cell system.

The greater the speed difference in the first opening strategy, the shorter the closing time of the anode hydrogen exhaust valve. That is to say, the greater the speed deviation of the hydrogen circulation pump, the higher the opening frequency of the anode hydrogen exhaust valve. By increasing the hydrogen discharge frequency of the anode hydrogen discharge valve, excess water and impurity gases in the anode flow channel are discharged.

After the fuel cell system starts the self-test, if the speed value of the hydrogen circulation pump is not less than the preset speed threshold, it indicates that the hydrogen circulation pump is in normal working condition, and the second opening strategy is used to maintain the normal operation of the fuel cell system. In the second opening strategy at this time, the opening time and closing time of the anode hydrogen exhaust valve are both fixed values. The nitrogen discharge process and drainage process of the anode are both in normal operation, and the anode hydrogen discharge valve is opened at a fixed frequency.

In a specific application scenario, when the speed deviation between the hydrogen circulation pump speed and the speed threshold exceeds 2.5%, the hydrogen circulation pump is considered to be operating abnormally. In the first opening strategy, the opening time of the anode hydrogen exhaust valve is 0.5s; for every 5% increase in the speed difference, the closing time of the anode hydrogen exhaust valve is reduced by 1s; in the second opening strategy, in the second opening strategy, the anode The opening time of the hydrogen exhaust valve is 0.5s; the closing time of the anode hydrogen exhaust valve is 10s.

Two operating modes can be set during actual operation, as shown in Figure 2. After the fuel cell system is turned on and completes self-test, it operates normally and determines whether the hydrogen circulation pump is working normally. If the hydrogen circulation pump is in normal working condition, the fuel cell system operation mode 1 is controlled. In this mode, the anode nitrogen discharge and drainage are in normal operation, and the anode hydrogen discharge valve is opened at a fixed frequency. For example, the hydrogen exhaust valve opens for 0.5s and closes for 10s.

If the hydrogen circulation pump is in an abnormal working state, the fuel cell system operation mode 2 is controlled, and the opening frequency of the anode hydrogen exhaust valve in this mode increases. For example, when the hydrogen circulation pump speed decreases by 5%, the hydrogen discharge valve opens for 0.5s and closes for 9s; when the hydrogen circulation pump speed decreases by 10%, the hydrogen discharge valve opens for 0.5s and closes for 8s; when the hydrogen circulation pump speed decreases by 100%, the hydrogen discharge valve opens for 0.5s and closes for 8s. The hydrogen valve opens for 0.5s and closes for 5s.

In some implementations of fuel cell vehicles, when starting the fuel cell system, relevant starting commands are sent to the fuel cell system through the vehicle-related controller to implement the starting self-test process. Specifically, when the fuel cell system starts self-test, step S101 of determining whether there is a fault code, as shown in Figure 3, includes:

Step S301: When the fuel cell system receives a power-on command, the FCU controller of the fuel cell system is initialized.

The fuel cell controller (Fuel-cell Control Unit, FCU) is the core control component of a fuel cell vehicle. It is responsible for processing driver input and system operating status signals, such as power demand, system status, vehicle signal input, and fault diagnosis. , fuel cell temperature and current, etc. Control decisions and calculations are made through these signals, and control instructions are output to each component control unit. The operating conditions of the vehicle basically determine the functions that the controller should implement.

Step S302: Obtain the shutdown data of the fuel cell system from the storage unit of the FCU controller, and determine whether there is a shutdown fault code in the fuel cell system from the shutdown data.

When the vehicle gives the fuel cell system a start command, the FCU controller controls the fuel cell system to perform a power-on self-check. This type of FCU controller has the function of latching the last shutdown status. When the FCU receives the startup command of the vehicle, it will determine from the shutdown data stored in the storage unit whether it contains the shutdown fault code generated when the last shutdown was abnormal.

For the problem that the fuel cell system is not purged when it is shut down abnormally, the water removal and purging work should be carried out before the fuel cell system is turned on. After the water is removed, the power load can be started, so as to avoid the single unit caused by flooding. Low question. In one implementation, if a fault code exists, as shown in Figure 4, the method includes:

Step S401, determine the water removal strategy of the fuel cell system according to the content of the fault code; wherein the water removal strategy includes: controlling the flow parameters of the cathode air valve and the anode hydrogen exhaust valve in the fuel cell system.

When the FCU receives the startup command of the entire vehicle, it will obtain the shutdown fault code generated when the last shutdown was abnormal from the shutdown data stored in the storage unit, and then determine the water removal strategy based on the content of the fault code. The fault code can correspond to data such as the water output of the fuel cell system, so that the water output can be used to determine the flow parameters of the cathode air valve and anode hydrogen drain valve in the fuel cell system, and then complete the drainage process.

Step S402: Use the water removal strategy to control the fuel cell system to perform a water removal purge operation.

For example, the previous shutdown of the fuel cell system was due to an emergency shutdown of the fuel cell system due to an abnormality in the insulation of the entire vehicle, and the shutdown and purge process was not performed. When the maintenance engineer handles the vehicle insulation problem and controls the fuel cell system to start up, the FCU can determine whether to perform the startup water removal process based on the stored shutdown data. In the water removal strategy, the air side flow rate of the cathode air valve of the fuel cell system is not less than 50g/s, and the water removal time is not less than 5s; the opening frequency of the anode hydrogen exhaust valve of the fuel cell system is at least increased by 0.5 of the original opening frequency. times; the speed of the hydrogen circulation pump is not less than 1000rpm.

The fuel cell system can be started after the water removal is completed. Therefore, in one embodiment, after the water removal strategy is used to control the fuel cell system to perform a water removal purge operation, as shown in Figure 5, the method also includes:

Step S501, clear the fault code.

Since the water removal operation is completed, the fault code can be cleared to indicate that the problem of accumulation of liquid water in the stack caused by abnormal shutdown has been resolved.

Step S502: After the fuel cell system completes the water removal and purging operation, start the fuel cell system and obtain the rotational speed value of the hydrogen circulation pump in real time.

This step corresponds to step S102 in the above embodiment, that is, if there is no fault code, the fuel cell system is started, and the rotational speed value of the hydrogen circulation pump is obtained in real time to complete subsequent steps.

In actual scenarios, when using the water removal strategy to control the fuel cell system to perform water removal and purging, it is necessary to monitor the moisture at the anode in the fuel cell system in real time, thereby further improving the control accuracy. Specifically, in one embodiment, after the water removal strategy is used to control the fuel cell system to perform a water removal purge operation, as shown in Figure 6, the method further includes:

Step S601: Use the moisture sensor in the fuel cell system to obtain the water at the stack in the fuel cell system in real time. sub-parameters.

Through the relevant moisture sensor installed at the stack in the fuel cell system, the moisture parameters at the stack in the fuel cell system can be obtained in real time. Specifically, it can be read directly through the relevant data reading interface.

Step S602: When the moisture parameter is lower than the preset moisture threshold and the fault code is cleared, the fuel cell system is started and the rotational speed value of the hydrogen circulation pump is obtained in real time.

When the moisture parameter is lower than the preset moisture threshold, it indicates that the moisture removal is complete, which can be used as the basis for the fuel cell system to complete the water removal and purge operation. Then clear the fault code to indicate that the stack liquid water accumulation problem caused by abnormal shutdown has been solved; then start the fuel cell system and obtain the speed value of the hydrogen circulation pump in real time to complete the subsequent steps.

Specifically, when there is a fault code in the above-mentioned abnormal handling method of the hydrogen circulation pump, the corresponding operating mode can be set, as shown in the flow diagram of the operating mode in Figure 7. For the problem of failure to purge caused by abnormal shutdown of the fuel cell system, the fault code stored in the relevant storage unit of the fuel cell system is used to detect the fault code during power-on self-test. If there is a fault code, execute the water removal and purge mode, so that the water removal and purging work is performed before the fuel cell system is started, and the power is loaded after the water is removed, thereby avoiding the single low problem caused by flooding; if If there is no fault code, the normal startup mode will be executed and the fuel cell system will be controlled to complete startup.

It can be seen that the above-mentioned startup control method of the fuel cell system provided by the embodiment of the present disclosure controls the DC converter to connect the fuel cell stack to the power when the operating voltage of the DC converter does not meet its operating characteristics during the startup process of the fuel cell system. The load end of the battery is coupled and connected. At this time, the fuel cell stack directly uses the voltage to power the vehicle load, causing the voltage of the fuel cell stack to drop until the voltage difference between the fuel cell stack voltage and the power battery voltage meets the operating requirements of the DC converter. Start the vehicle after meeting the characteristic conditions. This method solves the voltage matching problem between the fuel cell stack and the power battery without reducing the voltage of the fuel cell stack. At the same time, it can simplify the relevant boost circuit on the output side of the power battery and reduce vehicle manufacturing costs.

Regarding the abnormality handling method of a hydrogen circulation pump provided in the foregoing embodiments, embodiments of the present disclosure provide an anomaly handling system for a hydrogen circulation pump. The hydrogen circulation pump is used in a fuel cell system; as shown in Figure 8, the system includes:

The self-test module 810 is used to determine whether there is a fault code when the fuel cell system starts self-test;

The startup module 820 is used to start the fuel cell system if there is no fault code, and obtain the speed value of the hydrogen circulation pump in real time;

The first opening strategy determination module 830 is used to determine the anode hydrogen exhaust valve in the fuel cell system based on the speed difference between the speed of the hydrogen circulation pump and the speed threshold when the speed of the hydrogen circulation pump is less than the preset speed threshold. The first opening strategy; wherein, the greater the rotation speed difference in the first opening strategy, the shorter the closing time of the anode hydrogen exhaust valve;

The control module 840 is used to control the operation of the fuel cell system using the first start-up strategy.

The abnormality handling system of the hydrogen circulation pump provided by the embodiment of the present disclosure can use the rotation speed value of the hydrogen circulation pump to The operating status of the circulation pump is judged to determine the opening strategy of various hydrogen discharge components in the fuel cell system, so that the corresponding fault operation mode can be set according to different opening strategies; when the hydrogen circulation pump is abnormal, its corresponding function can be directly and automatically called. fault operation mode, thereby solving the problem of unreasonable control existing in the existing technology.

In one embodiment, the abnormality handling system of the hydrogen circulation pump further includes: a second opening strategy determination module; the second opening strategy determination module is used to: when the rotational speed value of the hydrogen circulation pump is not less than a preset rotational speed threshold, then The operation of the fuel cell system is controlled according to a preset second opening strategy; in the second opening strategy, the opening time and closing time of the anode hydrogen exhaust valve are both fixed values.

In one embodiment, in the first opening strategy of the first opening strategy determination module 830, the opening time of the anode hydrogen exhaust valve is 0.5s; every time the rotation speed difference increases by 5%, the closing time of the anode hydrogen exhaust valve Decrease by 1s; in the second opening strategy of the second opening strategy determination module, in the second opening strategy, the opening time of the anode hydrogen exhaust valve is 0.5s; the closing time of the anode hydrogen exhaust valve is 10s.

In one embodiment, the self-test module 810 is also used to: initialize the FCU controller of the fuel cell system when the fuel cell system receives a power-on command; obtain the shutdown data of the fuel cell system from the storage unit of the FCU controller, And determine whether there is a shutdown fault code in the fuel cell system from the shutdown data.

In one embodiment, the abnormality handling system of the hydrogen circulation pump further includes:

The water removal strategy determination module is used to: if there is a fault code, determine the water removal strategy of the fuel cell system based on the content of the fault code; wherein the water removal strategy includes: controlling the cathode air valve and the anode hydrogen exhaust valve in the fuel cell system flow parameters;

A water removal purge execution module is used to control the fuel cell system to perform a water removal purge operation using a water removal strategy.

In one embodiment, in the water removal strategy of the water removal strategy determination module, the air side flow rate of the cathode air valve of the fuel cell system is not less than 50g/s, and the water removal time is not less than 5s; the anode exhaust of the fuel cell system is The opening frequency of the hydrogen valve should be increased by at least 0.5 times the original opening frequency; the speed of the hydrogen circulation pump should not be less than 1000 rpm.

In one embodiment, the water removal purge execution module is also used to: clear the fault code; after the fuel cell system completes the water removal purge operation, start the fuel cell system and obtain the rotation speed value of the hydrogen circulation pump in real time.

The moisture parameter acquisition module is used to use the moisture sensor in the fuel cell system to obtain the moisture parameters at the stack in the fuel cell system in real time;

The moisture parameter control module is used to start the fuel cell system and obtain the speed value of the hydrogen circulation pump in real time when the fault code is cleared when the moisture parameter is lower than the preset moisture threshold.

The implementation principle and technical effects of the abnormality handling system for hydrogen circulating pumps provided by the embodiments of the present disclosure are the same as those of the aforementioned abnormality handling method embodiments for hydrogen circulating pumps. For the sake of brief description, the parts not mentioned in the device embodiments are not mentioned. Please refer to the corresponding content in the foregoing method embodiments.

An embodiment of the present disclosure provides an electronic device. Specifically, the electronic device includes a processor and a storage device; a computer program is stored on the storage device, and the computer program executes any of the methods of the above embodiments when run by the processor. .

Figure 9 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure. The electronic device 100 includes: a processor 50, a memory 51, a bus 52 and a communication interface 53. The processor 50, the communication interface 53 and the memory 51 pass through the bus 52 Connection; The processor 50 is used to execute executable modules stored in the memory 51, such as a computer program.

Among them, the memory 51 may include high-speed random access memory (RAM, Random Access Memory), and may also include non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 53 (which can be wired or wireless), and the Internet, wide area network, local network, metropolitan area network, etc. can be used.

The bus 52 may be an ISA bus, a PCI bus, an EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one bidirectional arrow is used in Figure 9, but it does not mean that there is only one bus or one type of bus.

The memory 51 is used to store the program, and the processor 50 executes the program after receiving the execution instruction. The method executed by the device for stream process definition disclosed in any of the embodiments of the present disclosure can be applied to the processor 50, Or implemented by processor 50.

The processor 50 may be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor 50 . The above-mentioned processor 50 can be a general-purpose processor, including a central processing unit (Central Processing Unit, referred to as CPU), a network processor (Network Processor, referred to as NP), etc.; it can also be a digital signal processor (Digital Signal Processing, referred to as DSP). ), application specific integrated circuit (Application Specific Inegrated Circuit, ASIC for short), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Each disclosed method, step and logical block diagram in the embodiment of the present disclosure can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present disclosure can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory 51. The processor 50 reads the information in the memory 51 and completes the steps of the above method in combination with its hardware.

The computer program product of the readable storage medium provided by the embodiment of the present disclosure includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method in the previous method embodiment. For specific implementation, please refer to the aforementioned method. The embodiments will not be described again here.

Functions may be stored in a computer-readable storage medium when implemented in the form of software functional units and sold or used as independent products. Based on this understanding, the technical solution of the present disclosure is essentially or contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present disclosure. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code. .

Finally, it should be noted that the above embodiments are only specific implementations of the present disclosure, and are used to illustrate the technical solutions of the present disclosure, but not to limit them. The protection scope of the present disclosure is not limited thereto. Although referring to the foregoing embodiments The present disclosure has been described in detail. Those of ordinary skill in the art should understand that any person familiar with the technical field can still modify or modify the technical solutions recorded in the foregoing embodiments within the technical scope disclosed in the present disclosure. It is easy to think of changes, or equivalent substitutions of some of the technical features; and these modifications, changes or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and shall be covered by the protection of the present disclosure. within the range. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Industrial applicability

The present disclosure provides an abnormality handling method, system and electronic equipment for a hydrogen circulation pump, relating to the field of fuel cell system control. This method determines whether there is a fault code when the fuel cell system starts self-test; if there is no fault code, then Start the fuel cell system and obtain the speed value of the hydrogen circulation pump in real time; when the speed value of the hydrogen circulation pump is less than the preset speed threshold, the fuel cell system is determined based on the speed difference between the speed value of the hydrogen circulation pump and the speed threshold. The first opening strategy of the anode hydrogen discharge valve is used, and the first opening strategy is used to control the operation of the fuel cell system; this method uses the speed value of the hydrogen circulation pump to determine the opening strategy of various hydrogen discharge components in the fuel cell system, so that the operation of the fuel cell system can be controlled according to the first opening strategy. Different opening strategies set corresponding fault operation modes; when the hydrogen circulation pump is abnormal, its corresponding fault operation mode can be directly and automatically called, thus solving the problem of unreasonable control existing in the existing technology.

In addition, it can be understood that the abnormality handling method, system and electronic equipment of the hydrogen circulation pump of the present disclosure are reproducible and can be used in a variety of industrial applications. For example, the hydrogen circulation pump abnormality handling method, system and electronic equipment of the present disclosure can be used in the field of fuel cell system control.

Claims

A method for handling abnormality of a hydrogen circulation pump, characterized in that the hydrogen circulation pump is used in a fuel cell system; the method includes:

When the fuel cell system starts self-test, determine whether there is a fault code;

If there is no fault code, start the fuel cell system and obtain the rotation speed value of the hydrogen circulation pump in real time;

When the rotational speed of the hydrogen circulation pump is less than the preset rotational speed threshold, the third position of the anode hydrogen exhaust valve in the fuel cell system is determined based on the rotational speed difference between the rotational speed of the hydrogen circulation pump and the rotational speed threshold. An opening strategy; wherein, the greater the rotation speed difference in the first opening strategy, the smaller the closing duration of the anode hydrogen exhaust valve;

The operation of the fuel cell system is controlled using the first start-up strategy.
The abnormality handling method of a hydrogen circulation pump according to claim 1, characterized in that when the rotation speed of the hydrogen circulation pump is not less than a preset rotation speed threshold, the fuel is controlled according to a preset second opening strategy. Operation of the battery system; wherein, in the second opening strategy, the opening time and closing time of the anode hydrogen exhaust valve are both fixed values.
The abnormality handling method of a hydrogen circulation pump according to claim 2, characterized in that in the first opening strategy, the opening time of the anode hydrogen exhaust valve is 0.5s; the rotational speed difference increases every 5 %, the closing time of the anode hydrogen exhaust valve is reduced by 1s;

In the second opening strategy, in the second opening strategy, the opening time of the anode hydrogen exhaust valve is 0.5s; the closing time of the anode hydrogen exhaust valve is 10s.
The abnormality handling method of a hydrogen circulation pump according to claim 1, characterized in that when the fuel cell system starts self-test, the step of determining whether there is a fault code includes:

When the fuel cell system receives a power-on command, initialize the FCU controller of the fuel cell system;

Obtain the shutdown data of the fuel cell system from the storage unit of the FCU controller, and determine whether there is a shutdown fault code in the fuel cell system from the shutdown data.
The abnormality handling method of a hydrogen circulation pump according to claim 1, characterized in that if a fault code exists, the method includes:

Determine the water removal strategy of the fuel cell system according to the content of the fault code; wherein the water removal strategy includes: controlling the flow parameters of the cathode air valve and the anode hydrogen exhaust valve in the fuel cell system;

The water removal strategy is used to control the fuel cell system to perform a water removal purge operation.
The abnormality handling method of a hydrogen circulation pump according to claim 5, characterized in that in the water removal strategy, the air side flow rate of the cathode air valve of the fuel cell system is not less than 50g/s, and the water removal time is not less than 50g/s. less than 5s;

The opening frequency of the anode hydrogen exhaust valve of the fuel cell system is increased by at least 0.5 times of the original opening frequency; the rotation speed of the hydrogen circulation pump is not less than 1000 rpm.
The abnormality handling method of a hydrogen circulation pump according to claim 5, characterized in that after using the water removal strategy to control the fuel cell system to perform a water removal purge operation, the method further includes:

Clear the trouble code;

After the fuel cell system completes the water removal and purging operation, start the fuel cell system and obtain the rotational speed value of the hydrogen circulation pump in real time.
The abnormality handling method of a hydrogen circulation pump according to claim 5, characterized in that after using the water removal strategy to control the fuel cell system to perform a water removal purge operation, the method further includes:

Utilize the moisture sensor in the fuel cell system to obtain the moisture parameters at the stack in the fuel cell system in real time;

When the moisture parameter is lower than the preset moisture threshold and the fault code is cleared, the fuel cell system is started and the rotational speed value of the hydrogen circulation pump is obtained in real time.
An abnormality handling system for a hydrogen circulation pump, characterized in that the hydrogen circulation pump is used in a fuel cell system; the system includes:

A self-test module, used to determine whether there is a fault code when the fuel cell system starts self-test;

A start module, used to start the fuel cell system if there is no fault code, and obtain the rotation speed value of the hydrogen circulation pump in real time;

A first opening strategy determination module, configured to determine the fuel cell based on the speed difference between the speed of the hydrogen circulation pump and the speed threshold when the speed of the hydrogen circulation pump is less than the preset speed threshold. The first opening strategy of the anode hydrogen exhaust valve in the system; wherein, the greater the rotation speed difference in the first opening strategy, the smaller the closing time of the anode hydrogen exhaust valve;

A control module configured to control the operation of the fuel cell system using the first start-up strategy.
An electronic device, characterized in that it includes a processor and a memory, the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement claims 1 to 8. The abnormality handling method of the hydrogen circulation pump described in any one of 8.