CN116130707B - Control method of fuel cell system apparatus and fuel cell system - Google Patents

Abstract

This application discloses a control method and device of a fuel cell system and a fuel cell system, which belongs to the technical field of fuel cells. The fuel cell system includes a stack, an anode gas supply mechanism, an anode exhaust mechanism and an anode gas circulation device. The method includes: when it is determined that the fuel cell system is in the start-up stage, controlling the anode gas supply mechanism to supply the gas according to the first gas supply rate. The anode gas inlet of the stack inputs hydrogen, controls the anode exhaust mechanism to discharge nitrogen from the anode gas outlet of the stack according to the first exhaust rate, and controls the anode gas circulation device to control the anode gas circulation of the stack according to the target gas circulation flow rate; When it is determined that the start-up phase is over, the anode gas supply mechanism is controlled to input hydrogen into the anode gas inlet of the stack according to the second gas supply rate, and the anode exhaust mechanism is controlled to supply hydrogen to the anode gas outlet of the stack according to the second exhaust rate. Nitrogen is vented. This method can protect the membrane electrode from high potential corrosion.

Description

Control method, device and fuel cell system of fuel cell system

Technical field

The present application belongs to the technical field of fuel cells, and in particular relates to a control method and device of a fuel cell system and a fuel cell system.

Background technique

Proton Exchange Membrane Fuel Cell (PEMFC) is a clean and efficient new energy power generation device due to its environmental friendliness, high energy conversion rate and rapid response.

When the fuel cell is not started, the gases in the anode and cathode of the battery are in an inert state where electrochemical reactions do not occur. When the fuel cell is started, the battery is in an active state with the anode containing hydrogen and the cathode containing oxygen. To start from the inert state to the active state, it is necessary to Avoid a state where the battery cell voltage is too high to prevent the membrane electrode of the fuel cell from being corroded by high potential, which will affect the performance and life of the fuel cell.

At present, the fuel cell is usually controlled to start from an inert state to an active state during the startup step by directly purging the gas in the anode and cathode. Related technologies use higher anode pressure to speed up the gas purge speed to reduce the unit voltage. Excessively high state time, but higher anode pressure may cause potential impact on the fuel cell stack and also affect fuel cell performance and life.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a fuel cell system control method, device and fuel cell system, which can prevent the membrane electrode of the fuel cell from being corroded by high potential during the startup process of the fuel cell from an inert shutdown state to an active operating state, and improve the efficiency of the fuel cell system. Fuel cell performance life.

In a first aspect, this application provides a control method for a fuel cell system. The fuel cell system includes a stack, an anode gas supply mechanism, an anode exhaust mechanism and an anode gas circulation device. The method includes:

When it is determined that the fuel cell system is in the startup stage, the anode gas supply mechanism is controlled to input hydrogen gas to the anode gas inlet of the stack according to a first gas supply rate, and the anode exhaust mechanism is controlled to input hydrogen gas according to the first gas supply rate. The gas rate discharges nitrogen from the anode gas outlet of the stack, and controls the anode gas circulation device to control the anode gas circulation of the stack according to the target gas circulation flow rate;

When it is determined that the start-up phase is over, the anode gas supply mechanism is controlled to input hydrogen into the anode gas inlet of the stack at a second gas supply rate, and the anode exhaust mechanism is controlled at a second exhaust rate. Discharge nitrogen from the anode gas outlet of the stack;

Wherein, the first air supply rate is less than the second air supply rate, and the first exhaust rate is less than the second exhaust rate.

According to the control method of the fuel cell system of the present application, during the startup process of the fuel cell from the inert shutdown state to the active operation state, the speed of hydrogen filling in the anode is reduced, the stack anode gas circulation volume is increased, and the stack anode gas circulation volume is reduced. The difference in reactant concentration in the overall flow field effectively prevents the membrane electrode of the fuel cell from being corroded by high potential and improves the performance and life of the fuel cell.

According to an embodiment of the present application, determining the end of the startup phase includes:

When it is determined that the voltage of the electric stack reaches the target voltage threshold, control the electric stack to operate in a constant voltage output mode;

When it is determined that the current of the stack operating in the constant voltage output mode reaches the target current threshold, it is determined that the start-up phase ends.

According to an embodiment of the present application, the target voltage threshold is 0.82 volts per cell to 0.85 volts per cell, and the target current threshold is 0.01 amps per square centimeter to 0.2 amps per square centimeter.

According to an embodiment of the present application, the ratio of the first air supply rate and the second air supply rate is 2%-20%.

According to an embodiment of the present application, the ratio of the first exhaust rate and the second exhaust rate is 2%-20%.

In a second aspect, this application provides a control device for a fuel cell system. The fuel cell system includes a stack, an anode gas supply mechanism, an anode exhaust mechanism and an anode gas circulation device. The device includes:

A first control module, configured to control the anode gas supply mechanism to input hydrogen gas to the anode gas inlet of the stack according to a first gas supply rate when it is determined that the fuel cell system is in the startup stage, and control the anode The exhaust mechanism exhausts the nitrogen from the anode gas outlet of the stack according to a first exhaust rate, and controls the anode gas circulation device to control the anode gas circulation of the stack according to the target gas circulation flow rate;

A second control module, configured to control the anode gas supply mechanism to input hydrogen gas to the anode gas inlet of the stack according to a second gas supply rate, and to control the anode exhaust when it is determined that the start-up phase is over. The mechanism discharges the nitrogen from the anode gas outlet of the stack according to the second exhaust rate;

Wherein, the first air supply rate is less than the second air supply rate, and the first exhaust rate is less than the second exhaust rate.

According to the control device of the fuel cell system of the present application, during the startup process of the fuel cell from the inert shutdown state to the active operating state, the speed of hydrogen filling in the anode is reduced, the amount of stack anode gas circulation is increased, and the stack anode gas circulation volume is reduced. The difference in reactant concentration in the overall flow field effectively prevents the membrane electrode of the fuel cell from being corroded by high potential and improves the performance and life of the fuel cell.

In a third aspect, this application provides a fuel cell system, including:

electric pile;

An anode gas supply mechanism, the anode gas supply mechanism is connected to the anode gas inlet of the electric stack, and the anode gas supply mechanism is used to input hydrogen into the anode gas inlet of the electric stack;

An anode exhaust mechanism, the anode exhaust mechanism is connected to the anode gas outlet of the stack, and the anode exhaust mechanism is used to discharge nitrogen from the anode gas outlet of the stack;

An anode gas circulation device, the anode gas circulation device is connected to the anode gas inlet of the electric stack, and the anode gas circulation device is used to control the anode gas circulation of the electric stack;

A controller, the controller is electrically connected to the anode gas supply mechanism, the anode exhaust mechanism and the anode gas circulation device, and the controller is used for the control method of the fuel cell system based on the first aspect, Control the operation of the anode gas supply mechanism, the anode exhaust mechanism and the anode gas circulation device.

According to the fuel cell system of the present application, during the startup process of the fuel cell from an inert shutdown state to an active operating state, the rate at which the anode is filled with hydrogen is reduced, the stack anode gas circulation volume is increased, and the overall stack anode flow field is reduced. The difference in reactant concentration effectively prevents the membrane electrode of the fuel cell from being corroded by high potential and improves the performance and life of the fuel cell.

In a fourth aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the following is implemented: The control method of the fuel cell system described in the above first aspect.

In a fifth aspect, the present application provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the control method of the fuel cell system as described in the first aspect is implemented. .

In a sixth aspect, the present application provides a computer program product, including a computer program that, when executed by a processor, implements the control method of a fuel cell system as described in the first aspect.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

Figure 1 is one of the schematic flow diagrams of a control method of a fuel cell system provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of a fuel cell system provided by an embodiment of the present application;

Figure 3 is a second schematic flowchart of the control method of the fuel cell system provided by the embodiment of the present application;

Figure 4 is a schematic structural diagram of a control device of a fuel cell system provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Reference signs:

Electric stack 210, hydrogen supply valve 220, nitrogen discharge valve 230, hydrogen circulation pump 240, steam water separator 250, drain valve 251, one-way valve 260.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the figures so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in orders other than those illustrated or described herein, and that "first," "second," etc. are distinguished Objects are usually of one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

The fuel cell system control method, fuel cell system control device, fuel cell system, electronic equipment and readable storage medium provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios.

Among them, the control method of the fuel cell system can be applied to the terminal, and can be specifically executed by hardware or software in the terminal.

The terminal includes, but is not limited to, a portable communication device such as a mobile phone or tablet computer having a touch-sensitive surface (eg, a touch screen display and/or a touch pad). It should also be understood that in certain embodiments, the terminal may not be a portable communication device, but rather a desktop computer having a touch-sensitive surface (eg, a touch screen display and/or a touch pad).

In various embodiments below, a terminal including a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

The embodiment of the present application provides a control method for a fuel cell system. The execution subject of the control method of the fuel cell system may be an electronic device or a functional module or functional entity in the electronic device that can implement the control method of the fuel cell system. This application implements The electronic devices mentioned in the examples include but are not limited to mobile phones, tablets, computers, cameras, wearable devices, etc. The following uses electronic devices as execution subjects as an example to describe the control method of the fuel cell system provided by the embodiment of the present application.

The fuel cell system provided by the embodiment of the present application includes a stack 210, an anode gas supply mechanism, an anode exhaust mechanism, and an anode gas circulation device.

The anode gas supply mechanism is used to input hydrogen gas into the anode gas inlet of the stack 210 , the anode exhaust mechanism is used to discharge nitrogen from the anode gas outlet of the stack 210 , and the anode gas circulation device is used to control the anode gas circulation of the stack 210 .

As shown in Figure 2, the anode gas supply mechanism can be a hydrogen supply valve 220. The hydrogen supply valve 220 is opened and hydrogen is input to the anode gas inlet of the stack 210. The anode exhaust mechanism can be a nitrogen discharge valve 230. The nitrogen discharge valve 230 is opened. , discharge the nitrogen from the anode gas outlet of the stack 210.

The anode gas circulation device can be a hydrogen circulation pump 240. The hydrogen circulation pump 240 is connected between the anode gas inlet of the stack 210 and the anode gas outlet of the stack 210. The hydrogen circulation pump 240 can control the gas circulation at the anode end of the stack 210. .

The fuel cell system is in the startup stage. The stack 210 of the fuel cell system starts from an inert state where the gases in the anode and cathode do not undergo electrochemical reaction, to an active state where the anode contains hydrogen and the cathode contains oxygen.

It should be noted that in the inert state, the gases in the anode and cathode of the stack 210 can be a combination of hydrogen/nitrogen, nitrogen/nitrogen, nitrogen/air or air/air, and the process of starting from the inert state to the active state is During the startup phase, the gases in the anode and cathode of the stack 210 are replaced by a combination of hydrogen/oxygen or hydrogen/air. During the startup phase, the membrane electrodes of the fuel cell system are susceptible to abnormally high potential corrosion, which affects the performance and life of the fuel cell.

As shown in FIG. 1 , the control method of the fuel cell system according to the embodiment of the present application includes: step 110 and step 120 .

Step 110: When it is determined that the fuel cell system is in the startup stage, control the anode gas supply mechanism to input hydrogen gas to the anode gas inlet of the stack 210 according to the first gas supply rate, and control the anode exhaust mechanism to discharge the electricity according to the first exhaust rate. The nitrogen gas from the anode gas outlet of the stack 210 is discharged, and the anode gas circulation device is controlled to control the anode gas circulation of the stack 210 according to the target gas circulation flow rate.

The target gas circulation flow rate can be the maximum gas circulation flow rate allowed by the anode gas circulation device. Controlling the anode gas circulation device to control the anode gas circulation of the stack 210 according to the target gas circulation flow rate can increase the anode gas circulation amount and reduce the power consumption. The overall hydrogen concentration difference in the anode flow field of stack 210.

Step 120: When it is determined that the start-up phase is over, control the anode gas supply mechanism to input hydrogen into the anode gas inlet of the stack 210 according to the second gas supply rate, and control the anode exhaust mechanism to drain the stack 210 according to the second exhaust rate. The nitrogen gas is discharged from the anode gas outlet.

Wherein, the first air supply rate is lower than the second air supply rate, and the first exhaust rate is lower than the second exhaust rate.

The first air supply rate and the first air supply rate used in the startup stage are slower air supply rates and air supply rates than the second air supply rate and the second exhaust rate used in the normal operation stage after the startup stage. gas rate.

In this embodiment, during the startup phase, the anode gas supply mechanism is controlled to input hydrogen into the anode gas inlet of the stack 210 according to the first gas supply rate, and the anode exhaust mechanism is controlled to supply the anode gas of the stack 210 according to the first exhaust rate. The nitrogen at the outlet is discharged, reducing the speed at which the anode of the stack 210 is filled with hydrogen. The anode gas circulation device controls the anode gas circulation of the stack 210 according to the target gas circulation flow rate, and increases the anode gas circulation amount of the stack 210, so that the anode of the stack 210 The difference in hydrogen concentration in the overall flow field is minimized by achieving a simultaneous increase in the overall hydrogen concentration in the anode flow field of the stack 210 .

It should be noted that the change in fuel cell electrode potential depends on the change in reactant concentration. The smaller the change in reactant concentration, the smaller the change in electrode potential.

In the related art, higher anode pressure is used to speed up the gas purge speed to reduce the time in which the unit voltage is in an excessively high state. However, higher anode pressure will lead to drastic changes in reactant concentration, causing serious damage to the fuel cell stack 210. The impact of potential impact affects the performance and life of the fuel cell.

In the embodiment of the present application, a relatively mild method of active gas replacement is used, and a relatively slow first gas supply rate and a first gas supply rate are used for charging control during the startup phase to reduce the rate at which the anode of the stack 210 is filled with hydrogen. Use the target gas circulation flow rate for gas circulation control and increase the anode gas circulation amount of the stack 210 to minimize the difference in reactant concentration in the overall anode flow field of the stack 210 and the overall potential difference is small, which can effectively avoid the potential in the active area. Differential corrosion of membrane electrodes.

According to the control method of the fuel cell system provided by the embodiment of the present application, during the startup process of the fuel cell from the inert shutdown state to the active operation state, the rate at which the anode is charged with hydrogen gas is increased, the amount of anode gas circulation in the stack 210 is reduced, and the The overall reactant concentration difference in the anode flow field of the small stack 210 effectively prevents the membrane electrode of the fuel cell from being corroded by high potential and improves the performance and life of the fuel cell.

In some embodiments, step 120, determining the end of the startup phase, may include:

When it is determined that the voltage of the stack 210 reaches the target voltage threshold, control the stack 210 to operate in a constant voltage output mode;

When it is determined that the current of the stack 210 operating in the constant voltage output mode reaches the target current threshold, it is determined that the start-up phase ends.

In this embodiment, when the stack 210 of the fuel cell system is started from the inert state to the active state, the voltage of the stack 210 gradually increases. When it is determined that the voltage of the stack 210 reaches the target voltage threshold, the stack 210 is controlled according to In constant voltage output mode operation, the voltage of the stack 210 is constant.

The stack 210 operates in the constant voltage output mode, and the current of the stack 210 gradually increases. When it is determined that the current of the stack 210 reaches the target current threshold, it is determined that the startup phase of the fuel cell system is over and the fuel cell system is in a normal operating phase.

In actual implementation, after it is determined that the startup phase is over and the operation phase is entered, the anode gas supply mechanism of the fuel cell system inputs hydrogen to the anode gas inlet of the stack 210 according to the second gas supply rate, and the anode exhaust mechanism supplies hydrogen gas according to the second exhaust rate. The nitrogen gas from the anode gas outlet of the stack 210 is discharged.

Compared with the first air supply rate and the first air supply rate used in the startup stage, the second air supply rate and the second air supply rate used in the operation stage are faster air supply rates and air supply rates, which can effectively Increase the reaction rate of the stack 210.

A specific embodiment is introduced below.

As shown in Figure 3, start the fuel cell system.

The hydrogen circulation pump 240 of the fuel cell system is controlled to operate at the maximum speed to increase the amount of anode gas circulation in the stack 210.

The hydrogen supply valve 220 is controlled to provide hydrogen gas to the anode of the stack 210 according to the first gas supply rate, and the hydrogen supply valve 220 replenishes a small amount of hydrogen. The nitrogen exhaust valve 230 is controlled to remove the gas from the anode of the stack 210 according to the first exhaust rate. The nitrogen valve 230 exhausts a small amount of gas to reduce the rate at which the anode is charged with hydrogen.

When it is determined that the voltage reaches the threshold, the stack 210 is controlled to operate in the constant voltage output mode; when it is determined that the current reaches the threshold, the nitrogen exhaust valve 230 is controlled to drain the gas from the anode of the stack 210 according to the second exhaust rate. After elimination, the hydrogen supply valve 220 is controlled to provide hydrogen to the anode of the stack 210 according to the second gas supply rate, the nitrogen discharge valve 230 discharges nitrogen normally, the hydrogen supply valve 220 supplies hydrogen normally, the startup phase is completed, and the fuel cell system operates normally.

In this embodiment, during the startup phase, the rate at which the anode is charged with hydrogen is reduced, the anode gas circulation volume of the stack 210 is increased, and the overall reactant concentration difference in the anode flow field of the stack 210 is reduced, effectively preventing the membrane electrode of the fuel cell from being subjected to high stress. Potential corrosion improves the performance and life of the fuel cell. During the operation phase, the rate at which the anode is filled with hydrogen is adjusted to increase the reaction rate of the stack 210.

In some embodiments, the target voltage threshold may be 0.82 volts/cell to 0.85 volts/cell.

For example, the target voltage threshold may be 0.83 volts/cell. During the startup phase, when it is determined that the voltage of the stack 210 has increased to 0.83 volts/cell, the stack 210 is controlled to operate in a constant voltage output mode.

In some embodiments, the target current threshold may be 0.01 amps per square centimeter to 0.2 amps per square centimeter.

For example, the target current threshold may be 0.05 ampere per square centimeter (A/cm ² ), the stack 210 operates in the constant voltage output mode, and the current of the stack 210 gradually increases to 0.05 A/cm ² to determine the end of the startup phase.

In some embodiments, the ratio of the first air supply rate to the second air supply rate is 2%-20%.

In this embodiment, the first gas supply rate is used in the startup phase to perform trace hydrogen supplementation, and the second gas supply rate is used in the normal phase to perform normal hydrogen supplementation. The trace hydrogen supplementation rate is 2%-20% of the normal hydrogen supplementation rate. It is ensured that the anode is charged with hydrogen slowly during the startup phase, and the difference in reactant concentration in the overall anode flow field of the stack 210 is reduced.

In some embodiments, the ratio of the first exhaust rate to the second exhaust rate is 2%-20%.

In this embodiment, the first exhaust rate is used in the startup stage to perform trace nitrogen discharge, and the second exhaust rate is used in the normal stage to perform normal nitrogen discharge. The trace nitrogen discharge rate is 2%-20% of the normal nitrogen discharge rate. This ensures that the anode discharges nitrogen slowly during the startup phase, thereby reducing the overall reactant concentration difference in the anode flow field of the stack 210.

For the control method of the fuel cell system provided by the embodiment of the present application, the execution subject may be a control device of the fuel cell system. In the embodiment of the present application, the control device of the fuel cell system executes the control method of the fuel cell system as an example to illustrate the control device of the fuel cell system provided by the embodiment of the present application.

An embodiment of the present application also provides a control device for a fuel cell system. The fuel cell system includes a stack 210, an anode gas supply mechanism, an anode exhaust mechanism, and an anode gas circulation device.

As shown in Figure 4, the control device of the fuel cell system includes:

The first control module 410 is used to control the anode gas supply mechanism to input hydrogen gas to the anode gas inlet of the stack 210 according to the first gas supply rate, and control the anode exhaust mechanism according to the first gas supply rate when it is determined that the fuel cell system is in the startup stage. The exhaust rate discharges nitrogen from the anode gas outlet of the stack 210, and controls the anode gas circulation device to control the anode gas circulation of the stack 210 according to the target gas circulation flow rate;

The second control module 420 is used to control the anode gas supply mechanism to input hydrogen gas to the anode gas inlet of the stack 210 according to the second gas supply rate, and to control the anode exhaust mechanism according to the second exhaust rate when the start-up phase is determined to be over. The nitrogen gas from the anode gas outlet of the stack 210 is discharged at a rate;

Wherein, the first air supply rate is lower than the second air supply rate, and the first exhaust rate is lower than the second exhaust rate.

According to the control device of the fuel cell system provided by the embodiment of the present application, during the startup process of the fuel cell from the inert shutdown state to the active operation state, the speed of hydrogen filling in the anode is reduced, the amount of anode gas circulation in the stack 210 is increased, and the amount of hydrogen gas circulated in the anode is reduced. The overall reactant concentration difference in the anode flow field of the small stack 210 effectively prevents the membrane electrode of the fuel cell from being corroded by high potential and improves the performance and life of the fuel cell.

In some embodiments, the second control module 420 is configured to control the stack 210 to operate in a constant voltage output mode when it is determined that the voltage of the stack 210 reaches the target voltage threshold;

When it is determined that the current of the stack 210 operating in the constant voltage output mode reaches the target current threshold, it is determined that the start-up phase ends.

In some embodiments, the target voltage threshold is 0.82 volts per cell to 0.85 volts per cell, and the target current threshold is 0.01 amps per square centimeter to 0.2 amps per square centimeter.

In some embodiments, the ratio of the first air supply rate to the second air supply rate is 2%-20%.

In some embodiments, the ratio of the first exhaust rate to the second exhaust rate is 2%-20%.

The control device of the fuel cell system in the embodiment of the present application may be an electronic device or a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than the terminal. For example, the electronic device may be a mobile phone, a tablet computer, a notebook computer, a handheld computer, a vehicle-mounted electronic device, a mobile Internet device (MID), or augmented reality (AR)/virtual reality (VR). ) equipment, robots, wearable devices, ultra-mobile personal computers (UMPC), netbooks or personal digital assistants (PDA), etc., and can also be servers, network attached storage (Network Attached Storage, NAS), etc. ), personal computer (PC), television (TV), teller machine or self-service machine, etc., the embodiments of this application are not specifically limited.

The control device of the fuel cell system in the embodiment of the present application may be a device with an operating system. The operating system may be an Android operating system, an IOS operating system, or other possible operating systems, which are not specifically limited in the embodiments of this application.

The control device of the fuel cell system provided by the embodiment of the present application can implement each process implemented by the method embodiment of Figure 1 or Figure 3. To avoid repetition, the details will not be described here.

Embodiments of the present application provide a fuel cell system, including: a stack 210, an anode gas supply mechanism, an anode exhaust mechanism, an anode gas circulation device and a controller.

The anode gas supply mechanism is connected to the anode gas inlet of the stack 210 , and is used to input hydrogen gas into the anode gas inlet of the stack 210 .

The anode exhaust mechanism is connected to the anode gas outlet of the stack 210, and is used to discharge nitrogen from the anode gas outlet of the stack 210.

The anode gas circulation device is connected to the anode gas inlet of the stack 210, and is used to control the anode gas circulation of the stack 210.

The controller is electrically connected to the anode gas supply mechanism, the anode exhaust mechanism and the anode gas circulation device. The controller is used to control the operation of the anode gas supply mechanism, the anode exhaust mechanism and the anode gas circulation device based on the above control method of the fuel cell system.

As shown in Figure 2, the anode gas supply mechanism can be a hydrogen supply valve 220. The hydrogen supply valve 220 is opened and hydrogen is input to the anode gas inlet of the stack 210. The anode exhaust mechanism can be a nitrogen discharge valve 230. The nitrogen discharge valve 230 is opened. , discharge the nitrogen from the anode gas outlet of the stack 210 .

The anode gas circulation device can be a hydrogen circulation pump 240. The hydrogen circulation pump 240 is connected between the anode gas inlet of the stack 210 and the anode gas outlet of the stack 210. The hydrogen circulation pump 240 can control the gas circulation at the anode end of the stack 210. .

A specific embodiment is introduced below.

As shown in Figure 3, start the fuel cell system.

The hydrogen circulation pump 240 of the fuel cell system is controlled to operate at the maximum speed to increase the amount of anode gas circulation in the stack 210.

The hydrogen supply valve 220 is controlled to provide hydrogen gas to the anode of the stack 210 according to the first gas supply rate, and the hydrogen supply valve 220 replenishes a small amount of hydrogen. The nitrogen exhaust valve 230 is controlled to remove the gas from the anode of the stack 210 according to the first exhaust rate. The nitrogen valve 230 exhausts a small amount of gas to reduce the rate at which the anode is charged with hydrogen.

When it is determined that the voltage reaches the threshold, the stack 210 is controlled to operate in the constant voltage output mode; when it is determined that the current reaches the threshold, the nitrogen exhaust valve 230 is controlled to drain the gas from the anode of the stack 210 according to the second exhaust rate. After elimination, the hydrogen supply valve 220 is controlled to provide hydrogen to the anode of the stack 210 according to the second gas supply rate, the nitrogen discharge valve 230 discharges nitrogen normally, the hydrogen supply valve 220 supplies hydrogen normally, the startup phase is completed, and the fuel cell system operates normally.

According to the fuel cell system provided by the embodiment of the present application, during the startup process of the fuel cell from the inert shutdown state to the active operating state, the rate at which the anode is filled with hydrogen gas is reduced, the amount of anode gas circulation in the stack 210 is increased, and the amount of the anode gas circulated in the stack is reduced. The overall reactant concentration difference in the 210 anode flow field effectively prevents the membrane electrode of the fuel cell from being corroded by high potential and improves the performance and life of the fuel cell.

In some embodiments, the fuel cell system further includes: a steam-water separator 250 and a one-way valve 260.

The steam-water separator 250 is provided with a drain valve 251. The anode gas outlet of the stack 210 is connected to the input end of the steam-water separator 250. The first output end of the steam-water separator 250 is connected to the input end of the anode exhaust mechanism. The steam-water separator 250 The second output end of the one-way valve 260 is connected to the input end of the one-way valve 260, the output end of the one-way valve 260 is connected to the first input end of the anode gas circulation device, the anode gas supply mechanism is connected to the second input end of the anode gas circulation device, The output end of the anode gas circulation device is connected to the anode gas inlet of the stack 210 .

Among them, the steam-water separator 250 is used to separate the moisture in the exhaust gas from the anode gas outlet, and discharge the accumulated moisture from the drain valve 251.

In this embodiment, hydrogen passes through the hydrogen supply valve 220 and the hydrogen circulation pump 240 in sequence, and enters the anode gas inlet of the stack 210. After the gas discharged from the anode gas outlet of the stack 210 is separated by the steam-water separator 250 to remove moisture, part of it passes through The one-way valve 260 enters the hydrogen circulation pump 240 and participates in the gas circulation of the anode of the stack 210, and the other part is discharged through the nitrogen discharge valve 230.

In some embodiments, as shown in Figure 5, this embodiment of the present application also provides an electronic device 500, including a processor 501, a memory 502, and a computer program stored on the memory 502 and executable on the processor 501. When the program is executed by the processor 501, each process of the above-mentioned fuel cell system control method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, the details will not be described here.

It should be noted that the electronic devices in the embodiments of the present application include the above-mentioned mobile electronic devices and non-mobile electronic devices.

Embodiments of the present application also provide a non-transitory computer-readable storage medium. A computer program is stored on the non-transitory computer-readable storage medium. When the computer program is executed by a processor, the control method embodiment of the above fuel cell system is implemented. Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.

Wherein, the processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application also provides a computer program product, including a computer program, which implements the above control method of the fuel cell system when executed by a processor.

Wherein, the processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above control method of the fuel cell system. Each process of the embodiment can achieve the same technical effect, so to avoid repetition, it will not be described again here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-a-chip or system-on-chip, etc.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. It is common skill in the art to people

Inspired by this application, and without departing from the purpose of this application and the scope protected by the claims, the author can also make many forms, all of which fall within the protection of this application.

In the description of this specification, reference is made to the terms "one embodiment," "some embodiments," "illustrative embodiments,"

Descriptions of "examples," "specific examples," or "some examples" or the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this manual, the above

Schematic representations of the terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art will understand that without departing from the

Various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purposes of the application, and the scope of the application is defined by the claims and their equivalents.

Claims (11)

1. A control method for a fuel cell system, characterized in that the fuel cell system includes a stack, an anode gas supply mechanism, an anode exhaust mechanism and an anode gas circulation device, and the method includes: When it is determined that the fuel cell system is in the startup stage, the anode gas supply mechanism is controlled to input hydrogen gas to the anode gas inlet of the stack according to a first gas supply rate, and the anode exhaust mechanism is controlled to input hydrogen gas according to the first gas supply rate. The gas rate discharges nitrogen from the anode gas outlet of the stack, and controls the anode gas circulation device to control the anode gas circulation of the stack according to the target gas circulation flow rate; When it is determined that the start-up phase is over, the anode gas supply mechanism is controlled to input hydrogen into the anode gas inlet of the stack at a second gas supply rate, and the anode exhaust mechanism is controlled at a second exhaust rate. Discharge nitrogen from the anode gas outlet of the stack; Wherein, the first gas supply rate is less than the second gas supply rate, the first exhaust rate is less than the second exhaust rate, and the target gas circulation flow is allowed by the anode gas circulation device. Maximum gas circulation flow. 2. The control method of a fuel cell system according to claim 1, wherein determining the end of the startup phase includes: When it is determined that the voltage of the electric stack reaches the target voltage threshold, control the electric stack to operate in a constant voltage output mode; When it is determined that the current of the stack operating in the constant voltage output mode reaches the target current threshold, it is determined that the start-up phase ends. 3. The control method of the fuel cell system according to claim 2, wherein the target voltage threshold is 0.82 volts per cell - 0.85 volts per cell, and the target current threshold is 0.01 amperes per square centimeter - 0.2 amps per square centimeter. 4. The control method of the fuel cell system according to any one of claims 1 to 3, characterized in that the ratio of the first air supply rate to the second air supply rate is 2%-20%. 5. The control method of the fuel cell system according to any one of claims 1 to 3, characterized in that the ratio of the first exhaust rate and the second exhaust rate is 2%-20%. 6. A control device for a fuel cell system, characterized in that the fuel cell system includes a stack, an anode gas supply mechanism, an anode exhaust mechanism and an anode gas circulation device, and the device includes: A first control module, configured to control the anode gas supply mechanism to input hydrogen gas to the anode gas inlet of the stack according to a first gas supply rate when it is determined that the fuel cell system is in the startup stage, and control the anode The exhaust mechanism exhausts the nitrogen from the anode gas outlet of the stack according to a first exhaust rate, and controls the anode gas circulation device to control the anode gas circulation of the stack according to the target gas circulation flow rate; A second control module, configured to control the anode gas supply mechanism to input hydrogen gas to the anode gas inlet of the stack according to a second gas supply rate, and to control the anode exhaust when it is determined that the start-up phase is over. The mechanism discharges the nitrogen from the anode gas outlet of the stack according to the second exhaust rate; Wherein, the first gas supply rate is less than the second gas supply rate, the first exhaust rate is less than the second exhaust rate, and the target gas circulation flow is allowed by the anode gas circulation device. Maximum gas circulation flow. 7. A fuel cell system, characterized by comprising: electric pile; An anode gas supply mechanism, the anode gas supply mechanism is connected to the anode gas inlet of the electric stack, and the anode gas supply mechanism is used to input hydrogen into the anode gas inlet of the electric stack; An anode exhaust mechanism, the anode exhaust mechanism is connected to the anode gas outlet of the stack, and the anode exhaust mechanism is used to discharge nitrogen from the anode gas outlet of the stack; An anode gas circulation device, the anode gas circulation device is connected to the anode gas inlet of the electric stack, and the anode gas circulation device is used to control the anode gas circulation of the electric pile; A controller, the controller is electrically connected to the anode gas supply mechanism, the anode exhaust mechanism and the anode gas circulation device, and the controller is used in the fuel cell system according to any one of claims 1 to 5 The control method controls the operation of the anode gas supply mechanism, the anode exhaust mechanism and the anode gas circulation device. 8. The fuel cell system according to claim 7, further comprising: a steam-water separator and a one-way valve, the steam-water separator is provided with a drain valve, and the anode gas outlet of the stack is connected to the steam-water The input end of the separator is connected, the first output end of the steam-water separator is connected with the input end of the anode exhaust mechanism, and the second output end of the steam-water separator is connected with the input end of the one-way valve, The output end of the one-way valve is connected to the first input end of the anode gas circulation device, the anode gas supply mechanism is connected to the second input end of the anode gas circulation device, and the output of the anode gas circulation device The end is connected to the anode gas inlet of the stack. 9. An electronic device, including a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that when the processor executes the program, it implements any one of claims 1-5 The control method of the fuel cell system described in the item. 10. A non-transitory computer-readable storage medium with a computer program stored thereon, characterized in that when the computer program is executed by a processor, the control of the fuel cell system according to any one of claims 1-5 is implemented. method. 11. A computer program product, comprising a computer program, characterized in that when the computer program is executed by a processor, the control method of the fuel cell system according to any one of claims 1 to 5 is implemented.